1d9e397b599b13d642138480a28c14db7a136bf0Adam Langley#!/usr/bin/env perl 2d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# 3d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# ==================================================================== 4d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# Written by Andy Polyakov <appro@openssl.org> for the OpenSSL 5d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# project. The module is, however, dual licensed under OpenSSL and 6d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# CRYPTOGAMS licenses depending on where you obtain it. For further 7d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# details see http://www.openssl.org/~appro/cryptogams/. 8d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# ==================================================================== 9d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# 10d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# March, May, June 2010 11d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# 12d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# The module implements "4-bit" GCM GHASH function and underlying 13d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# single multiplication operation in GF(2^128). "4-bit" means that it 14d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# uses 256 bytes per-key table [+64/128 bytes fixed table]. It has two 15d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# code paths: vanilla x86 and vanilla SSE. Former will be executed on 16d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# 486 and Pentium, latter on all others. SSE GHASH features so called 17d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# "528B" variant of "4-bit" method utilizing additional 256+16 bytes 18d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# of per-key storage [+512 bytes shared table]. Performance results 19d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# are for streamed GHASH subroutine and are expressed in cycles per 20d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# processed byte, less is better: 21d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# 22d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# gcc 2.95.3(*) SSE assembler x86 assembler 23d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# 24d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# Pentium 105/111(**) - 50 25d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# PIII 68 /75 12.2 24 26d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# P4 125/125 17.8 84(***) 27d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# Opteron 66 /70 10.1 30 28d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# Core2 54 /67 8.4 18 29d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# Atom 105/105 16.8 53 30d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# VIA Nano 69 /71 13.0 27 31d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# 32d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# (*) gcc 3.4.x was observed to generate few percent slower code, 33d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# which is one of reasons why 2.95.3 results were chosen, 34d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# another reason is lack of 3.4.x results for older CPUs; 35d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# comparison with SSE results is not completely fair, because C 36d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# results are for vanilla "256B" implementation, while 37d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# assembler results are for "528B";-) 38d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# (**) second number is result for code compiled with -fPIC flag, 39d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# which is actually more relevant, because assembler code is 40d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# position-independent; 41d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# (***) see comment in non-MMX routine for further details; 42d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# 43d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# To summarize, it's >2-5 times faster than gcc-generated code. To 44d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# anchor it to something else SHA1 assembler processes one byte in 45d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# ~7 cycles on contemporary x86 cores. As for choice of MMX/SSE 46d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# in particular, see comment at the end of the file... 47d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 48d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# May 2010 49d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# 50d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# Add PCLMULQDQ version performing at 2.10 cycles per processed byte. 51d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# The question is how close is it to theoretical limit? The pclmulqdq 52d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# instruction latency appears to be 14 cycles and there can't be more 53d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# than 2 of them executing at any given time. This means that single 54d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# Karatsuba multiplication would take 28 cycles *plus* few cycles for 55d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# pre- and post-processing. Then multiplication has to be followed by 56d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# modulo-reduction. Given that aggregated reduction method [see 57d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# "Carry-less Multiplication and Its Usage for Computing the GCM Mode" 58d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# white paper by Intel] allows you to perform reduction only once in 59d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# a while we can assume that asymptotic performance can be estimated 60d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# as (28+Tmod/Naggr)/16, where Tmod is time to perform reduction 61d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# and Naggr is the aggregation factor. 62d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# 63d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# Before we proceed to this implementation let's have closer look at 64d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# the best-performing code suggested by Intel in their white paper. 65d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# By tracing inter-register dependencies Tmod is estimated as ~19 66d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# cycles and Naggr chosen by Intel is 4, resulting in 2.05 cycles per 67d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# processed byte. As implied, this is quite optimistic estimate, 68d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# because it does not account for Karatsuba pre- and post-processing, 69d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# which for a single multiplication is ~5 cycles. Unfortunately Intel 70d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# does not provide performance data for GHASH alone. But benchmarking 71d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# AES_GCM_encrypt ripped out of Fig. 15 of the white paper with aadt 72d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# alone resulted in 2.46 cycles per byte of out 16KB buffer. Note that 73d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# the result accounts even for pre-computing of degrees of the hash 74d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# key H, but its portion is negligible at 16KB buffer size. 75d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# 76d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# Moving on to the implementation in question. Tmod is estimated as 77d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# ~13 cycles and Naggr is 2, giving asymptotic performance of ... 78d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# 2.16. How is it possible that measured performance is better than 79d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# optimistic theoretical estimate? There is one thing Intel failed 80d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# to recognize. By serializing GHASH with CTR in same subroutine 81d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# former's performance is really limited to above (Tmul + Tmod/Naggr) 82d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# equation. But if GHASH procedure is detached, the modulo-reduction 83d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# can be interleaved with Naggr-1 multiplications at instruction level 84d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# and under ideal conditions even disappear from the equation. So that 85d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# optimistic theoretical estimate for this implementation is ... 86d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# 28/16=1.75, and not 2.16. Well, it's probably way too optimistic, 87d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# at least for such small Naggr. I'd argue that (28+Tproc/Naggr), 88d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# where Tproc is time required for Karatsuba pre- and post-processing, 89d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# is more realistic estimate. In this case it gives ... 1.91 cycles. 90d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# Or in other words, depending on how well we can interleave reduction 91d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# and one of the two multiplications the performance should be betwen 92d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# 1.91 and 2.16. As already mentioned, this implementation processes 93d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# one byte out of 8KB buffer in 2.10 cycles, while x86_64 counterpart 94d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# - in 2.02. x86_64 performance is better, because larger register 95d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# bank allows to interleave reduction and multiplication better. 96d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# 97d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# Does it make sense to increase Naggr? To start with it's virtually 98d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# impossible in 32-bit mode, because of limited register bank 99d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# capacity. Otherwise improvement has to be weighed agiainst slower 100d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# setup, as well as code size and complexity increase. As even 101d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# optimistic estimate doesn't promise 30% performance improvement, 102d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# there are currently no plans to increase Naggr. 103d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# 104d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# Special thanks to David Woodhouse <dwmw2@infradead.org> for 105d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# providing access to a Westmere-based system on behalf of Intel 106d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# Open Source Technology Centre. 107d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 108d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# January 2010 109d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# 110d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# Tweaked to optimize transitions between integer and FP operations 111d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# on same XMM register, PCLMULQDQ subroutine was measured to process 112d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# one byte in 2.07 cycles on Sandy Bridge, and in 2.12 - on Westmere. 113d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# The minor regression on Westmere is outweighed by ~15% improvement 114d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# on Sandy Bridge. Strangely enough attempt to modify 64-bit code in 115d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# similar manner resulted in almost 20% degradation on Sandy Bridge, 116d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# where original 64-bit code processes one byte in 1.95 cycles. 117d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 118d9e397b599b13d642138480a28c14db7a136bf0Adam Langley##################################################################### 119d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# For reference, AMD Bulldozer processes one byte in 1.98 cycles in 120d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# 32-bit mode and 1.89 in 64-bit. 121d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 122d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# February 2013 123d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# 124d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# Overhaul: aggregate Karatsuba post-processing, improve ILP in 125d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# reduction_alg9. Resulting performance is 1.96 cycles per byte on 126d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# Westmere, 1.95 - on Sandy/Ivy Bridge, 1.76 - on Bulldozer. 127d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 128d9e397b599b13d642138480a28c14db7a136bf0Adam Langley$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1; 129d9e397b599b13d642138480a28c14db7a136bf0Adam Langleypush(@INC,"${dir}","${dir}../../perlasm"); 130d9e397b599b13d642138480a28c14db7a136bf0Adam Langleyrequire "x86asm.pl"; 131d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 132d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&asm_init($ARGV[0],"ghash-x86.pl",$x86only = $ARGV[$#ARGV] eq "386"); 133d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 134e9ada863a7b3e81f5d2b1e3bdd2305da902a87f5Adam Langley$sse2=0; 135e9ada863a7b3e81f5d2b1e3bdd2305da902a87f5Adam Langleyfor (@ARGV) { $sse2=1 if (/-DOPENSSL_IA32_SSE2/); } 136d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 137d9e397b599b13d642138480a28c14db7a136bf0Adam Langley($Zhh,$Zhl,$Zlh,$Zll) = ("ebp","edx","ecx","ebx"); 138d9e397b599b13d642138480a28c14db7a136bf0Adam Langley$inp = "edi"; 139d9e397b599b13d642138480a28c14db7a136bf0Adam Langley$Htbl = "esi"; 140d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 141d9e397b599b13d642138480a28c14db7a136bf0Adam Langley$unroll = 0; # Affects x86 loop. Folded loop performs ~7% worse 142d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # than unrolled, which has to be weighted against 143d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # 2.5x x86-specific code size reduction. 144d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 145d9e397b599b13d642138480a28c14db7a136bf0Adam Langleysub x86_loop { 146d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my $off = shift; 147d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my $rem = "eax"; 148d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 149d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Zhh,&DWP(4,$Htbl,$Zll)); 150d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Zhl,&DWP(0,$Htbl,$Zll)); 151d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Zlh,&DWP(12,$Htbl,$Zll)); 152d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Zll,&DWP(8,$Htbl,$Zll)); 153d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ($rem,$rem); # avoid partial register stalls on PIII 154d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 155d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # shrd practically kills P4, 2.5x deterioration, but P4 has 156d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # MMX code-path to execute. shrd runs tad faster [than twice 157d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # the shifts, move's and or's] on pre-MMX Pentium (as well as 158d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # PIII and Core2), *but* minimizes code size, spares register 159d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # and thus allows to fold the loop... 160d9e397b599b13d642138480a28c14db7a136bf0Adam Langley if (!$unroll) { 161d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my $cnt = $inp; 162d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($cnt,15); 163d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &jmp (&label("x86_loop")); 164d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &set_label("x86_loop",16); 165d9e397b599b13d642138480a28c14db7a136bf0Adam Langley for($i=1;$i<=2;$i++) { 166d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&LB($rem),&LB($Zll)); 167d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shrd ($Zll,$Zlh,4); 168d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &and (&LB($rem),0xf); 169d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shrd ($Zlh,$Zhl,4); 170d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shrd ($Zhl,$Zhh,4); 171d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shr ($Zhh,4); 172d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ($Zhh,&DWP($off+16,"esp",$rem,4)); 173d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 174d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&LB($rem),&BP($off,"esp",$cnt)); 175d9e397b599b13d642138480a28c14db7a136bf0Adam Langley if ($i&1) { 176d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &and (&LB($rem),0xf0); 177d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } else { 178d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shl (&LB($rem),4); 179d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 180d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 181d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ($Zll,&DWP(8,$Htbl,$rem)); 182d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ($Zlh,&DWP(12,$Htbl,$rem)); 183d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ($Zhl,&DWP(0,$Htbl,$rem)); 184d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ($Zhh,&DWP(4,$Htbl,$rem)); 185d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 186d9e397b599b13d642138480a28c14db7a136bf0Adam Langley if ($i&1) { 187d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &dec ($cnt); 188d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &js (&label("x86_break")); 189d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } else { 190d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &jmp (&label("x86_loop")); 191d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 192d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 193d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &set_label("x86_break",16); 194d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } else { 195d9e397b599b13d642138480a28c14db7a136bf0Adam Langley for($i=1;$i<32;$i++) { 196d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &comment($i); 197d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&LB($rem),&LB($Zll)); 198d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shrd ($Zll,$Zlh,4); 199d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &and (&LB($rem),0xf); 200d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shrd ($Zlh,$Zhl,4); 201d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shrd ($Zhl,$Zhh,4); 202d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shr ($Zhh,4); 203d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ($Zhh,&DWP($off+16,"esp",$rem,4)); 204d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 205d9e397b599b13d642138480a28c14db7a136bf0Adam Langley if ($i&1) { 206d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&LB($rem),&BP($off+15-($i>>1),"esp")); 207d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &and (&LB($rem),0xf0); 208d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } else { 209d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&LB($rem),&BP($off+15-($i>>1),"esp")); 210d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shl (&LB($rem),4); 211d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 212d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 213d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ($Zll,&DWP(8,$Htbl,$rem)); 214d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ($Zlh,&DWP(12,$Htbl,$rem)); 215d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ($Zhl,&DWP(0,$Htbl,$rem)); 216d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ($Zhh,&DWP(4,$Htbl,$rem)); 217d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 218d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 219d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &bswap ($Zll); 220d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &bswap ($Zlh); 221d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &bswap ($Zhl); 222d9e397b599b13d642138480a28c14db7a136bf0Adam Langley if (!$x86only) { 223d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &bswap ($Zhh); 224d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } else { 225d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ("eax",$Zhh); 226d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &bswap ("eax"); 227d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Zhh,"eax"); 228d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 229d9e397b599b13d642138480a28c14db7a136bf0Adam Langley} 230d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 231d9e397b599b13d642138480a28c14db7a136bf0Adam Langleyif ($unroll) { 232d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &function_begin_B("_x86_gmult_4bit_inner"); 233d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &x86_loop(4); 234d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &ret (); 235d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &function_end_B("_x86_gmult_4bit_inner"); 236d9e397b599b13d642138480a28c14db7a136bf0Adam Langley} 237d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 238d9e397b599b13d642138480a28c14db7a136bf0Adam Langleysub deposit_rem_4bit { 239d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my $bias = shift; 240d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 241d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP($bias+0, "esp"),0x0000<<16); 242d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP($bias+4, "esp"),0x1C20<<16); 243d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP($bias+8, "esp"),0x3840<<16); 244d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP($bias+12,"esp"),0x2460<<16); 245d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP($bias+16,"esp"),0x7080<<16); 246d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP($bias+20,"esp"),0x6CA0<<16); 247d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP($bias+24,"esp"),0x48C0<<16); 248d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP($bias+28,"esp"),0x54E0<<16); 249d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP($bias+32,"esp"),0xE100<<16); 250d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP($bias+36,"esp"),0xFD20<<16); 251d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP($bias+40,"esp"),0xD940<<16); 252d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP($bias+44,"esp"),0xC560<<16); 253d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP($bias+48,"esp"),0x9180<<16); 254d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP($bias+52,"esp"),0x8DA0<<16); 255d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP($bias+56,"esp"),0xA9C0<<16); 256d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP($bias+60,"esp"),0xB5E0<<16); 257d9e397b599b13d642138480a28c14db7a136bf0Adam Langley} 258d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 259d9e397b599b13d642138480a28c14db7a136bf0Adam Langley$suffix = $x86only ? "" : "_x86"; 260d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 261d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_begin("gcm_gmult_4bit".$suffix); 262d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &stack_push(16+4+1); # +1 for stack alignment 263d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($inp,&wparam(0)); # load Xi 264d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Htbl,&wparam(1)); # load Htable 265d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 266d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Zhh,&DWP(0,$inp)); # load Xi[16] 267d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Zhl,&DWP(4,$inp)); 268d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Zlh,&DWP(8,$inp)); 269d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Zll,&DWP(12,$inp)); 270d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 271d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &deposit_rem_4bit(16); 272d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 273d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(0,"esp"),$Zhh); # copy Xi[16] on stack 274d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(4,"esp"),$Zhl); 275d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(8,"esp"),$Zlh); 276d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(12,"esp"),$Zll); 277d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shr ($Zll,20); 278d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &and ($Zll,0xf0); 279d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 280d9e397b599b13d642138480a28c14db7a136bf0Adam Langley if ($unroll) { 281d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &call ("_x86_gmult_4bit_inner"); 282d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } else { 283d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &x86_loop(0); 284d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($inp,&wparam(0)); 285d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 286d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 287d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(12,$inp),$Zll); 288d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(8,$inp),$Zlh); 289d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(4,$inp),$Zhl); 290d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(0,$inp),$Zhh); 291d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &stack_pop(16+4+1); 292d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_end("gcm_gmult_4bit".$suffix); 293d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 294d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_begin("gcm_ghash_4bit".$suffix); 295d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &stack_push(16+4+1); # +1 for 64-bit alignment 296d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Zll,&wparam(0)); # load Xi 297d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Htbl,&wparam(1)); # load Htable 298d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($inp,&wparam(2)); # load in 299d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ("ecx",&wparam(3)); # load len 300d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &add ("ecx",$inp); 301d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&wparam(3),"ecx"); 302d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 303d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Zhh,&DWP(0,$Zll)); # load Xi[16] 304d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Zhl,&DWP(4,$Zll)); 305d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Zlh,&DWP(8,$Zll)); 306d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Zll,&DWP(12,$Zll)); 307d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 308d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &deposit_rem_4bit(16); 309d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 310d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &set_label("x86_outer_loop",16); 311d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ($Zll,&DWP(12,$inp)); # xor with input 312d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ($Zlh,&DWP(8,$inp)); 313d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ($Zhl,&DWP(4,$inp)); 314d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ($Zhh,&DWP(0,$inp)); 315d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(12,"esp"),$Zll); # dump it on stack 316d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(8,"esp"),$Zlh); 317d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(4,"esp"),$Zhl); 318d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(0,"esp"),$Zhh); 319d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 320d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shr ($Zll,20); 321d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &and ($Zll,0xf0); 322d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 323d9e397b599b13d642138480a28c14db7a136bf0Adam Langley if ($unroll) { 324d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &call ("_x86_gmult_4bit_inner"); 325d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } else { 326d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &x86_loop(0); 327d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($inp,&wparam(2)); 328d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 329d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &lea ($inp,&DWP(16,$inp)); 330d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &cmp ($inp,&wparam(3)); 331d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&wparam(2),$inp) if (!$unroll); 332d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &jb (&label("x86_outer_loop")); 333d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 334d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($inp,&wparam(0)); # load Xi 335d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(12,$inp),$Zll); 336d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(8,$inp),$Zlh); 337d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(4,$inp),$Zhl); 338d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(0,$inp),$Zhh); 339d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &stack_pop(16+4+1); 340d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_end("gcm_ghash_4bit".$suffix); 341d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 342d9e397b599b13d642138480a28c14db7a136bf0Adam Langleyif (!$x86only) {{{ 343d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 344d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&static_label("rem_4bit"); 345d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 346d9e397b599b13d642138480a28c14db7a136bf0Adam Langleyif (!$sse2) {{ # pure-MMX "May" version... 347d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 348d9e397b599b13d642138480a28c14db7a136bf0Adam Langley$S=12; # shift factor for rem_4bit 349d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 350d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_begin_B("_mmx_gmult_4bit_inner"); 351d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# MMX version performs 3.5 times better on P4 (see comment in non-MMX 352d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# routine for further details), 100% better on Opteron, ~70% better 353d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# on Core2 and PIII... In other words effort is considered to be well 354d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# spent... Since initial release the loop was unrolled in order to 355d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# "liberate" register previously used as loop counter. Instead it's 356d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# used to optimize critical path in 'Z.hi ^= rem_4bit[Z.lo&0xf]'. 357d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# The path involves move of Z.lo from MMX to integer register, 358d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# effective address calculation and finally merge of value to Z.hi. 359d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# Reference to rem_4bit is scheduled so late that I had to >>4 360d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# rem_4bit elements. This resulted in 20-45% procent improvement 361d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# on contemporary �-archs. 362d9e397b599b13d642138480a28c14db7a136bf0Adam Langley{ 363d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my $cnt; 364d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my $rem_4bit = "eax"; 365d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my @rem = ($Zhh,$Zll); 366d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my $nhi = $Zhl; 367d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my $nlo = $Zlh; 368d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 369d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my ($Zlo,$Zhi) = ("mm0","mm1"); 370d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my $tmp = "mm2"; 371d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 372d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ($nlo,$nlo); # avoid partial register stalls on PIII 373d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($nhi,$Zll); 374d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&LB($nlo),&LB($nhi)); 375d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shl (&LB($nlo),4); 376d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &and ($nhi,0xf0); 377d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq ($Zlo,&QWP(8,$Htbl,$nlo)); 378d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq ($Zhi,&QWP(0,$Htbl,$nlo)); 379d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movd ($rem[0],$Zlo); 380d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 381d9e397b599b13d642138480a28c14db7a136bf0Adam Langley for ($cnt=28;$cnt>=-2;$cnt--) { 382d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my $odd = $cnt&1; 383d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my $nix = $odd ? $nlo : $nhi; 384d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 385d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shl (&LB($nlo),4) if ($odd); 386d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Zlo,4); 387d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq ($tmp,$Zhi); 388d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Zhi,4); 389d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zlo,&QWP(8,$Htbl,$nix)); 390d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&LB($nlo),&BP($cnt/2,$inp)) if (!$odd && $cnt>=0); 391d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psllq ($tmp,60); 392d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &and ($nhi,0xf0) if ($odd); 393d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zhi,&QWP(0,$rem_4bit,$rem[1],8)) if ($cnt<28); 394d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &and ($rem[0],0xf); 395d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zhi,&QWP(0,$Htbl,$nix)); 396d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($nhi,$nlo) if (!$odd && $cnt>=0); 397d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movd ($rem[1],$Zlo); 398d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zlo,$tmp); 399d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 400d9e397b599b13d642138480a28c14db7a136bf0Adam Langley push (@rem,shift(@rem)); # "rotate" registers 401d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 402d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 403d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($inp,&DWP(4,$rem_4bit,$rem[1],8)); # last rem_4bit[rem] 404d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 405d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Zlo,32); # lower part of Zlo is already there 406d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movd ($Zhl,$Zhi); 407d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Zhi,32); 408d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movd ($Zlh,$Zlo); 409d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movd ($Zhh,$Zhi); 410d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shl ($inp,4); # compensate for rem_4bit[i] being >>4 411d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 412d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &bswap ($Zll); 413d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &bswap ($Zhl); 414d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &bswap ($Zlh); 415d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ($Zhh,$inp); 416d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &bswap ($Zhh); 417d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 418d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &ret (); 419d9e397b599b13d642138480a28c14db7a136bf0Adam Langley} 420d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_end_B("_mmx_gmult_4bit_inner"); 421d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 422d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_begin("gcm_gmult_4bit_mmx"); 423d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($inp,&wparam(0)); # load Xi 424d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Htbl,&wparam(1)); # load Htable 425d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 426d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &call (&label("pic_point")); 427d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &set_label("pic_point"); 428d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &blindpop("eax"); 429d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &lea ("eax",&DWP(&label("rem_4bit")."-".&label("pic_point"),"eax")); 430d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 431d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movz ($Zll,&BP(15,$inp)); 432d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 433d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &call ("_mmx_gmult_4bit_inner"); 434d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 435d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($inp,&wparam(0)); # load Xi 436d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &emms (); 437d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(12,$inp),$Zll); 438d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(4,$inp),$Zhl); 439d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(8,$inp),$Zlh); 440d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(0,$inp),$Zhh); 441d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_end("gcm_gmult_4bit_mmx"); 442d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 443d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# Streamed version performs 20% better on P4, 7% on Opteron, 444d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# 10% on Core2 and PIII... 445d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_begin("gcm_ghash_4bit_mmx"); 446d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Zhh,&wparam(0)); # load Xi 447d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Htbl,&wparam(1)); # load Htable 448d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($inp,&wparam(2)); # load in 449d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Zlh,&wparam(3)); # load len 450d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 451d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &call (&label("pic_point")); 452d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &set_label("pic_point"); 453d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &blindpop("eax"); 454d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &lea ("eax",&DWP(&label("rem_4bit")."-".&label("pic_point"),"eax")); 455d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 456d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &add ($Zlh,$inp); 457d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&wparam(3),$Zlh); # len to point at the end of input 458d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &stack_push(4+1); # +1 for stack alignment 459d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 460d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Zll,&DWP(12,$Zhh)); # load Xi[16] 461d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Zhl,&DWP(4,$Zhh)); 462d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Zlh,&DWP(8,$Zhh)); 463d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Zhh,&DWP(0,$Zhh)); 464d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &jmp (&label("mmx_outer_loop")); 465d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 466d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &set_label("mmx_outer_loop",16); 467d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ($Zll,&DWP(12,$inp)); 468d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ($Zhl,&DWP(4,$inp)); 469d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ($Zlh,&DWP(8,$inp)); 470d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ($Zhh,&DWP(0,$inp)); 471d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&wparam(2),$inp); 472d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(12,"esp"),$Zll); 473d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(4,"esp"),$Zhl); 474d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(8,"esp"),$Zlh); 475d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(0,"esp"),$Zhh); 476d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 477d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($inp,"esp"); 478d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shr ($Zll,24); 479d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 480d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &call ("_mmx_gmult_4bit_inner"); 481d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 482d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($inp,&wparam(2)); 483d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &lea ($inp,&DWP(16,$inp)); 484d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &cmp ($inp,&wparam(3)); 485d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &jb (&label("mmx_outer_loop")); 486d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 487d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($inp,&wparam(0)); # load Xi 488d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &emms (); 489d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(12,$inp),$Zll); 490d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(4,$inp),$Zhl); 491d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(8,$inp),$Zlh); 492d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(0,$inp),$Zhh); 493d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 494d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &stack_pop(4+1); 495d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_end("gcm_ghash_4bit_mmx"); 496d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 497d9e397b599b13d642138480a28c14db7a136bf0Adam Langley}} else {{ # "June" MMX version... 498d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # ... has slower "April" gcm_gmult_4bit_mmx with folded 499d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # loop. This is done to conserve code size... 500d9e397b599b13d642138480a28c14db7a136bf0Adam Langley$S=16; # shift factor for rem_4bit 501d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 502d9e397b599b13d642138480a28c14db7a136bf0Adam Langleysub mmx_loop() { 503d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# MMX version performs 2.8 times better on P4 (see comment in non-MMX 504d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# routine for further details), 40% better on Opteron and Core2, 50% 505d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# better on PIII... In other words effort is considered to be well 506d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# spent... 507d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my $inp = shift; 508d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my $rem_4bit = shift; 509d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my $cnt = $Zhh; 510d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my $nhi = $Zhl; 511d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my $nlo = $Zlh; 512d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my $rem = $Zll; 513d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 514d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my ($Zlo,$Zhi) = ("mm0","mm1"); 515d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my $tmp = "mm2"; 516d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 517d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ($nlo,$nlo); # avoid partial register stalls on PIII 518d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($nhi,$Zll); 519d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&LB($nlo),&LB($nhi)); 520d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($cnt,14); 521d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shl (&LB($nlo),4); 522d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &and ($nhi,0xf0); 523d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq ($Zlo,&QWP(8,$Htbl,$nlo)); 524d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq ($Zhi,&QWP(0,$Htbl,$nlo)); 525d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movd ($rem,$Zlo); 526d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &jmp (&label("mmx_loop")); 527d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 528d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &set_label("mmx_loop",16); 529d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Zlo,4); 530d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &and ($rem,0xf); 531d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq ($tmp,$Zhi); 532d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Zhi,4); 533d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zlo,&QWP(8,$Htbl,$nhi)); 534d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&LB($nlo),&BP(0,$inp,$cnt)); 535d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psllq ($tmp,60); 536d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zhi,&QWP(0,$rem_4bit,$rem,8)); 537d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &dec ($cnt); 538d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movd ($rem,$Zlo); 539d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zhi,&QWP(0,$Htbl,$nhi)); 540d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($nhi,$nlo); 541d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zlo,$tmp); 542d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &js (&label("mmx_break")); 543d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 544d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shl (&LB($nlo),4); 545d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &and ($rem,0xf); 546d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Zlo,4); 547d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &and ($nhi,0xf0); 548d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq ($tmp,$Zhi); 549d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Zhi,4); 550d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zlo,&QWP(8,$Htbl,$nlo)); 551d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psllq ($tmp,60); 552d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zhi,&QWP(0,$rem_4bit,$rem,8)); 553d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movd ($rem,$Zlo); 554d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zhi,&QWP(0,$Htbl,$nlo)); 555d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zlo,$tmp); 556d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &jmp (&label("mmx_loop")); 557d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 558d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &set_label("mmx_break",16); 559d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shl (&LB($nlo),4); 560d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &and ($rem,0xf); 561d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Zlo,4); 562d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &and ($nhi,0xf0); 563d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq ($tmp,$Zhi); 564d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Zhi,4); 565d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zlo,&QWP(8,$Htbl,$nlo)); 566d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psllq ($tmp,60); 567d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zhi,&QWP(0,$rem_4bit,$rem,8)); 568d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movd ($rem,$Zlo); 569d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zhi,&QWP(0,$Htbl,$nlo)); 570d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zlo,$tmp); 571d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 572d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Zlo,4); 573d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &and ($rem,0xf); 574d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq ($tmp,$Zhi); 575d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Zhi,4); 576d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zlo,&QWP(8,$Htbl,$nhi)); 577d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psllq ($tmp,60); 578d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zhi,&QWP(0,$rem_4bit,$rem,8)); 579d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movd ($rem,$Zlo); 580d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zhi,&QWP(0,$Htbl,$nhi)); 581d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zlo,$tmp); 582d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 583d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Zlo,32); # lower part of Zlo is already there 584d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movd ($Zhl,$Zhi); 585d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Zhi,32); 586d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movd ($Zlh,$Zlo); 587d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movd ($Zhh,$Zhi); 588d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 589d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &bswap ($Zll); 590d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &bswap ($Zhl); 591d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &bswap ($Zlh); 592d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &bswap ($Zhh); 593d9e397b599b13d642138480a28c14db7a136bf0Adam Langley} 594d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 595d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_begin("gcm_gmult_4bit_mmx"); 596d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($inp,&wparam(0)); # load Xi 597d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Htbl,&wparam(1)); # load Htable 598d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 599d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &call (&label("pic_point")); 600d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &set_label("pic_point"); 601d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &blindpop("eax"); 602d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &lea ("eax",&DWP(&label("rem_4bit")."-".&label("pic_point"),"eax")); 603d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 604d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movz ($Zll,&BP(15,$inp)); 605d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 606d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mmx_loop($inp,"eax"); 607d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 608d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &emms (); 609d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(12,$inp),$Zll); 610d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(4,$inp),$Zhl); 611d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(8,$inp),$Zlh); 612d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(0,$inp),$Zhh); 613d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_end("gcm_gmult_4bit_mmx"); 614d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 615d9e397b599b13d642138480a28c14db7a136bf0Adam Langley###################################################################### 616d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# Below subroutine is "528B" variant of "4-bit" GCM GHASH function 617d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# (see gcm128.c for details). It provides further 20-40% performance 618d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# improvement over above mentioned "May" version. 619d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 620d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&static_label("rem_8bit"); 621d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 622d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_begin("gcm_ghash_4bit_mmx"); 623d9e397b599b13d642138480a28c14db7a136bf0Adam Langley{ my ($Zlo,$Zhi) = ("mm7","mm6"); 624d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my $rem_8bit = "esi"; 625d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my $Htbl = "ebx"; 626d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 627d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # parameter block 628d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ("eax",&wparam(0)); # Xi 629d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ("ebx",&wparam(1)); # Htable 630d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ("ecx",&wparam(2)); # inp 631d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ("edx",&wparam(3)); # len 632d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ("ebp","esp"); # original %esp 633d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &call (&label("pic_point")); 634d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &set_label ("pic_point"); 635d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &blindpop ($rem_8bit); 636d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &lea ($rem_8bit,&DWP(&label("rem_8bit")."-".&label("pic_point"),$rem_8bit)); 637d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 638d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &sub ("esp",512+16+16); # allocate stack frame... 639d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &and ("esp",-64); # ...and align it 640d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &sub ("esp",16); # place for (u8)(H[]<<4) 641d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 642d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &add ("edx","ecx"); # pointer to the end of input 643d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(528+16+0,"esp"),"eax"); # save Xi 644d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(528+16+8,"esp"),"edx"); # save inp+len 645d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(528+16+12,"esp"),"ebp"); # save original %esp 646d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 647d9e397b599b13d642138480a28c14db7a136bf0Adam Langley { my @lo = ("mm0","mm1","mm2"); 648d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my @hi = ("mm3","mm4","mm5"); 649d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my @tmp = ("mm6","mm7"); 650d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my ($off1,$off2,$i) = (0,0,); 651d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 652d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &add ($Htbl,128); # optimize for size 653d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &lea ("edi",&DWP(16+128,"esp")); 654d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &lea ("ebp",&DWP(16+256+128,"esp")); 655d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 656d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # decompose Htable (low and high parts are kept separately), 657d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # generate Htable[]>>4, (u8)(Htable[]<<4), save to stack... 658d9e397b599b13d642138480a28c14db7a136bf0Adam Langley for ($i=0;$i<18;$i++) { 659d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 660d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ("edx",&DWP(16*$i+8-128,$Htbl)) if ($i<16); 661d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq ($lo[0],&QWP(16*$i+8-128,$Htbl)) if ($i<16); 662d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psllq ($tmp[1],60) if ($i>1); 663d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq ($hi[0],&QWP(16*$i+0-128,$Htbl)) if ($i<16); 664d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &por ($lo[2],$tmp[1]) if ($i>1); 665d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq (&QWP($off1-128,"edi"),$lo[1]) if ($i>0 && $i<17); 666d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($lo[1],4) if ($i>0 && $i<17); 667d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq (&QWP($off1,"edi"),$hi[1]) if ($i>0 && $i<17); 668d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq ($tmp[0],$hi[1]) if ($i>0 && $i<17); 669d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq (&QWP($off2-128,"ebp"),$lo[2]) if ($i>1); 670d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($hi[1],4) if ($i>0 && $i<17); 671d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq (&QWP($off2,"ebp"),$hi[2]) if ($i>1); 672d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shl ("edx",4) if ($i<16); 673d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&BP($i,"esp"),&LB("edx")) if ($i<16); 674d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 675d9e397b599b13d642138480a28c14db7a136bf0Adam Langley unshift (@lo,pop(@lo)); # "rotate" registers 676d9e397b599b13d642138480a28c14db7a136bf0Adam Langley unshift (@hi,pop(@hi)); 677d9e397b599b13d642138480a28c14db7a136bf0Adam Langley unshift (@tmp,pop(@tmp)); 678d9e397b599b13d642138480a28c14db7a136bf0Adam Langley $off1 += 8 if ($i>0); 679d9e397b599b13d642138480a28c14db7a136bf0Adam Langley $off2 += 8 if ($i>1); 680d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 681d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 682d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 683d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq ($Zhi,&QWP(0,"eax")); 684d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ("ebx",&DWP(8,"eax")); 685d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ("edx",&DWP(12,"eax")); # load Xi 686d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 687d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&set_label("outer",16); 688d9e397b599b13d642138480a28c14db7a136bf0Adam Langley { my $nlo = "eax"; 689d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my $dat = "edx"; 690d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my @nhi = ("edi","ebp"); 691d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my @rem = ("ebx","ecx"); 692d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my @red = ("mm0","mm1","mm2"); 693d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my $tmp = "mm3"; 694d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 695d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ($dat,&DWP(12,"ecx")); # merge input data 696d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ("ebx",&DWP(8,"ecx")); 697d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zhi,&QWP(0,"ecx")); 698d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &lea ("ecx",&DWP(16,"ecx")); # inp+=16 699d9e397b599b13d642138480a28c14db7a136bf0Adam Langley #&mov (&DWP(528+12,"esp"),$dat); # save inp^Xi 700d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(528+8,"esp"),"ebx"); 701d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq (&QWP(528+0,"esp"),$Zhi); 702d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(528+16+4,"esp"),"ecx"); # save inp 703d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 704d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ($nlo,$nlo); 705d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &rol ($dat,8); 706d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&LB($nlo),&LB($dat)); 707d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($nhi[1],$nlo); 708d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &and (&LB($nlo),0x0f); 709d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shr ($nhi[1],4); 710d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($red[0],$red[0]); 711d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &rol ($dat,8); # next byte 712d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($red[1],$red[1]); 713d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($red[2],$red[2]); 714d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 715d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # Just like in "May" verson modulo-schedule for critical path in 716d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # 'Z.hi ^= rem_8bit[Z.lo&0xff^((u8)H[nhi]<<4)]<<48'. Final 'pxor' 717d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # is scheduled so late that rem_8bit[] has to be shifted *right* 718d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # by 16, which is why last argument to pinsrw is 2, which 719d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # corresponds to <<32=<<48>>16... 720d9e397b599b13d642138480a28c14db7a136bf0Adam Langley for ($j=11,$i=0;$i<15;$i++) { 721d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 722d9e397b599b13d642138480a28c14db7a136bf0Adam Langley if ($i>0) { 723d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zlo,&QWP(16,"esp",$nlo,8)); # Z^=H[nlo] 724d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &rol ($dat,8); # next byte 725d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zhi,&QWP(16+128,"esp",$nlo,8)); 726d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 727d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zlo,$tmp); 728d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zhi,&QWP(16+256+128,"esp",$nhi[0],8)); 729d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor (&LB($rem[1]),&BP(0,"esp",$nhi[0])); # rem^(H[nhi]<<4) 730d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } else { 731d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq ($Zlo,&QWP(16,"esp",$nlo,8)); 732d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq ($Zhi,&QWP(16+128,"esp",$nlo,8)); 733d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 734d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 735d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&LB($nlo),&LB($dat)); 736d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($dat,&DWP(528+$j,"esp")) if (--$j%4==0); 737d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 738d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movd ($rem[0],$Zlo); 739d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movz ($rem[1],&LB($rem[1])) if ($i>0); 740d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Zlo,8); # Z>>=8 741d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 742d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq ($tmp,$Zhi); 743d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($nhi[0],$nlo); 744d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Zhi,8); 745d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 746d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zlo,&QWP(16+256+0,"esp",$nhi[1],8)); # Z^=H[nhi]>>4 747d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &and (&LB($nlo),0x0f); 748d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psllq ($tmp,56); 749d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 750d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zhi,$red[1]) if ($i>1); 751d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shr ($nhi[0],4); 752d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pinsrw ($red[0],&WP(0,$rem_8bit,$rem[1],2),2) if ($i>0); 753d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 754d9e397b599b13d642138480a28c14db7a136bf0Adam Langley unshift (@red,pop(@red)); # "rotate" registers 755d9e397b599b13d642138480a28c14db7a136bf0Adam Langley unshift (@rem,pop(@rem)); 756d9e397b599b13d642138480a28c14db7a136bf0Adam Langley unshift (@nhi,pop(@nhi)); 757d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 758d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 759d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zlo,&QWP(16,"esp",$nlo,8)); # Z^=H[nlo] 760d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zhi,&QWP(16+128,"esp",$nlo,8)); 761d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor (&LB($rem[1]),&BP(0,"esp",$nhi[0])); # rem^(H[nhi]<<4) 762d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 763d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zlo,$tmp); 764d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zhi,&QWP(16+256+128,"esp",$nhi[0],8)); 765d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movz ($rem[1],&LB($rem[1])); 766d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 767d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($red[2],$red[2]); # clear 2nd word 768d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psllq ($red[1],4); 769d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 770d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movd ($rem[0],$Zlo); 771d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Zlo,4); # Z>>=4 772d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 773d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq ($tmp,$Zhi); 774d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Zhi,4); 775d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shl ($rem[0],4); # rem<<4 776d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 777d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zlo,&QWP(16,"esp",$nhi[1],8)); # Z^=H[nhi] 778d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psllq ($tmp,60); 779d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movz ($rem[0],&LB($rem[0])); 780d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 781d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zlo,$tmp); 782d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zhi,&QWP(16+128,"esp",$nhi[1],8)); 783d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 784d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pinsrw ($red[0],&WP(0,$rem_8bit,$rem[1],2),2); 785d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zhi,$red[1]); 786d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 787d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movd ($dat,$Zlo); 788d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pinsrw ($red[2],&WP(0,$rem_8bit,$rem[0],2),3); # last is <<48 789d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 790d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psllq ($red[0],12); # correct by <<16>>4 791d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zhi,$red[0]); 792d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Zlo,32); 793d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zhi,$red[2]); 794d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 795d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ("ecx",&DWP(528+16+4,"esp")); # restore inp 796d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movd ("ebx",$Zlo); 797d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq ($tmp,$Zhi); # 01234567 798d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psllw ($Zhi,8); # 1.3.5.7. 799d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlw ($tmp,8); # .0.2.4.6 800d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &por ($Zhi,$tmp); # 10325476 801d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &bswap ($dat); 802d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufw ($Zhi,$Zhi,0b00011011); # 76543210 803d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &bswap ("ebx"); 804d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 805d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &cmp ("ecx",&DWP(528+16+8,"esp")); # are we done? 806d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &jne (&label("outer")); 807d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 808d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 809d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ("eax",&DWP(528+16+0,"esp")); # restore Xi 810d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(12,"eax"),"edx"); 811d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(8,"eax"),"ebx"); 812d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq (&QWP(0,"eax"),$Zhi); 813d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 814d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ("esp",&DWP(528+16+12,"esp")); # restore original %esp 815d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &emms (); 816d9e397b599b13d642138480a28c14db7a136bf0Adam Langley} 817d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_end("gcm_ghash_4bit_mmx"); 818d9e397b599b13d642138480a28c14db7a136bf0Adam Langley}} 819d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 820d9e397b599b13d642138480a28c14db7a136bf0Adam Langleyif ($sse2) {{ 821d9e397b599b13d642138480a28c14db7a136bf0Adam Langley###################################################################### 822d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# PCLMULQDQ version. 823d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 824d9e397b599b13d642138480a28c14db7a136bf0Adam Langley$Xip="eax"; 825d9e397b599b13d642138480a28c14db7a136bf0Adam Langley$Htbl="edx"; 826d9e397b599b13d642138480a28c14db7a136bf0Adam Langley$const="ecx"; 827d9e397b599b13d642138480a28c14db7a136bf0Adam Langley$inp="esi"; 828d9e397b599b13d642138480a28c14db7a136bf0Adam Langley$len="ebx"; 829d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 830d9e397b599b13d642138480a28c14db7a136bf0Adam Langley($Xi,$Xhi)=("xmm0","xmm1"); $Hkey="xmm2"; 831d9e397b599b13d642138480a28c14db7a136bf0Adam Langley($T1,$T2,$T3)=("xmm3","xmm4","xmm5"); 832d9e397b599b13d642138480a28c14db7a136bf0Adam Langley($Xn,$Xhn)=("xmm6","xmm7"); 833d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 834d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&static_label("bswap"); 835d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 836d9e397b599b13d642138480a28c14db7a136bf0Adam Langleysub clmul64x64_T2 { # minimal "register" pressure 837d9e397b599b13d642138480a28c14db7a136bf0Adam Langleymy ($Xhi,$Xi,$Hkey,$HK)=@_; 838d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 839d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($Xhi,$Xi); # 840d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufd ($T1,$Xi,0b01001110); 841d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufd ($T2,$Hkey,0b01001110) if (!defined($HK)); 842d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T1,$Xi); # 843d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T2,$Hkey) if (!defined($HK)); 844d9e397b599b13d642138480a28c14db7a136bf0Adam Langley $HK=$T2 if (!defined($HK)); 845d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 846d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pclmulqdq ($Xi,$Hkey,0x00); ####### 847d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pclmulqdq ($Xhi,$Hkey,0x11); ####### 848d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pclmulqdq ($T1,$HK,0x00); ####### 849d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xorps ($T1,$Xi); # 850d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xorps ($T1,$Xhi); # 851d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 852d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T2,$T1); # 853d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrldq ($T1,8); 854d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pslldq ($T2,8); # 855d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xhi,$T1); 856d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$T2); # 857d9e397b599b13d642138480a28c14db7a136bf0Adam Langley} 858d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 859d9e397b599b13d642138480a28c14db7a136bf0Adam Langleysub clmul64x64_T3 { 860d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# Even though this subroutine offers visually better ILP, it 861d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# was empirically found to be a tad slower than above version. 862d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# At least in gcm_ghash_clmul context. But it's just as well, 863d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# because loop modulo-scheduling is possible only thanks to 864d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# minimized "register" pressure... 865d9e397b599b13d642138480a28c14db7a136bf0Adam Langleymy ($Xhi,$Xi,$Hkey)=@_; 866d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 867d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T1,$Xi); # 868d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($Xhi,$Xi); 869d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pclmulqdq ($Xi,$Hkey,0x00); ####### 870d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pclmulqdq ($Xhi,$Hkey,0x11); ####### 871d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufd ($T2,$T1,0b01001110); # 872d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufd ($T3,$Hkey,0b01001110); 873d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T2,$T1); # 874d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T3,$Hkey); 875d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pclmulqdq ($T2,$T3,0x00); ####### 876d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T2,$Xi); # 877d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T2,$Xhi); # 878d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 879d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T3,$T2); # 880d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrldq ($T2,8); 881d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pslldq ($T3,8); # 882d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xhi,$T2); 883d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$T3); # 884d9e397b599b13d642138480a28c14db7a136bf0Adam Langley} 885d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 886d9e397b599b13d642138480a28c14db7a136bf0Adam Langleyif (1) { # Algorithm 9 with <<1 twist. 887d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # Reduction is shorter and uses only two 888d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # temporary registers, which makes it better 889d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # candidate for interleaving with 64x64 890d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # multiplication. Pre-modulo-scheduled loop 891d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # was found to be ~20% faster than Algorithm 5 892d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # below. Algorithm 9 was therefore chosen for 893d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # further optimization... 894d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 895d9e397b599b13d642138480a28c14db7a136bf0Adam Langleysub reduction_alg9 { # 17/11 times faster than Intel version 896d9e397b599b13d642138480a28c14db7a136bf0Adam Langleymy ($Xhi,$Xi) = @_; 897d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 898d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # 1st phase 899d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T2,$Xi); # 900d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T1,$Xi); 901d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psllq ($Xi,5); 902d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T1,$Xi); # 903d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psllq ($Xi,1); 904d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$T1); # 905d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psllq ($Xi,57); # 906d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T1,$Xi); # 907d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pslldq ($Xi,8); 908d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrldq ($T1,8); # 909d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$T2); 910d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xhi,$T1); # 911d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 912d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # 2nd phase 913d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T2,$Xi); 914d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Xi,1); 915d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xhi,$T2); # 916d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T2,$Xi); 917d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Xi,5); 918d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$T2); # 919d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Xi,1); # 920d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$Xhi) # 921d9e397b599b13d642138480a28c14db7a136bf0Adam Langley} 922d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 923d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_begin_B("gcm_init_clmul"); 924d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Htbl,&wparam(0)); 925d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Xip,&wparam(1)); 926d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 927d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &call (&label("pic")); 928d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&set_label("pic"); 929d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &blindpop ($const); 930d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &lea ($const,&DWP(&label("bswap")."-".&label("pic"),$const)); 931d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 932d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($Hkey,&QWP(0,$Xip)); 933d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufd ($Hkey,$Hkey,0b01001110);# dword swap 934d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 935d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # <<1 twist 936d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufd ($T2,$Hkey,0b11111111); # broadcast uppermost dword 937d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T1,$Hkey); 938d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psllq ($Hkey,1); 939d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T3,$T3); # 940d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($T1,63); 941d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pcmpgtd ($T3,$T2); # broadcast carry bit 942d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pslldq ($T1,8); 943d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &por ($Hkey,$T1); # H<<=1 944d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 945d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # magic reduction 946d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pand ($T3,&QWP(16,$const)); # 0x1c2_polynomial 947d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Hkey,$T3); # if(carry) H^=0x1c2_polynomial 948d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 949d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # calculate H^2 950d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($Xi,$Hkey); 951d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &clmul64x64_T2 ($Xhi,$Xi,$Hkey); 952d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &reduction_alg9 ($Xhi,$Xi); 953d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 954d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufd ($T1,$Hkey,0b01001110); 955d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufd ($T2,$Xi,0b01001110); 956d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T1,$Hkey); # Karatsuba pre-processing 957d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu (&QWP(0,$Htbl),$Hkey); # save H 958d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T2,$Xi); # Karatsuba pre-processing 959d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu (&QWP(16,$Htbl),$Xi); # save H^2 960d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &palignr ($T2,$T1,8); # low part is H.lo^H.hi 961d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu (&QWP(32,$Htbl),$T2); # save Karatsuba "salt" 962d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 963d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &ret (); 964d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_end_B("gcm_init_clmul"); 965d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 966d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_begin_B("gcm_gmult_clmul"); 967d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Xip,&wparam(0)); 968d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Htbl,&wparam(1)); 969d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 970d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &call (&label("pic")); 971d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&set_label("pic"); 972d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &blindpop ($const); 973d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &lea ($const,&DWP(&label("bswap")."-".&label("pic"),$const)); 974d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 975d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($Xi,&QWP(0,$Xip)); 976d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T3,&QWP(0,$const)); 977d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movups ($Hkey,&QWP(0,$Htbl)); 978d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufb ($Xi,$T3); 979d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movups ($T2,&QWP(32,$Htbl)); 980d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 981d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &clmul64x64_T2 ($Xhi,$Xi,$Hkey,$T2); 982d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &reduction_alg9 ($Xhi,$Xi); 983d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 984d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufb ($Xi,$T3); 985d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu (&QWP(0,$Xip),$Xi); 986d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 987d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &ret (); 988d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_end_B("gcm_gmult_clmul"); 989d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 990d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_begin("gcm_ghash_clmul"); 991d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Xip,&wparam(0)); 992d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Htbl,&wparam(1)); 993d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($inp,&wparam(2)); 994d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($len,&wparam(3)); 995d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 996d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &call (&label("pic")); 997d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&set_label("pic"); 998d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &blindpop ($const); 999d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &lea ($const,&DWP(&label("bswap")."-".&label("pic"),$const)); 1000d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1001d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($Xi,&QWP(0,$Xip)); 1002d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T3,&QWP(0,$const)); 1003d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($Hkey,&QWP(0,$Htbl)); 1004d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufb ($Xi,$T3); 1005d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1006d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &sub ($len,0x10); 1007d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &jz (&label("odd_tail")); 1008d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1009d9e397b599b13d642138480a28c14db7a136bf0Adam Langley ####### 1010d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # Xi+2 =[H*(Ii+1 + Xi+1)] mod P = 1011d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # [(H*Ii+1) + (H*Xi+1)] mod P = 1012d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # [(H*Ii+1) + H^2*(Ii+Xi)] mod P 1013d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # 1014d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($T1,&QWP(0,$inp)); # Ii 1015d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($Xn,&QWP(16,$inp)); # Ii+1 1016d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufb ($T1,$T3); 1017d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufb ($Xn,$T3); 1018d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($T3,&QWP(32,$Htbl)); 1019d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$T1); # Ii+Xi 1020d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1021d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufd ($T1,$Xn,0b01001110); # H*Ii+1 1022d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($Xhn,$Xn); 1023d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T1,$Xn); # 1024d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &lea ($inp,&DWP(32,$inp)); # i+=2 1025d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1026d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pclmulqdq ($Xn,$Hkey,0x00); ####### 1027d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pclmulqdq ($Xhn,$Hkey,0x11); ####### 1028d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pclmulqdq ($T1,$T3,0x00); ####### 1029d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movups ($Hkey,&QWP(16,$Htbl)); # load H^2 1030d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &nop (); 1031d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1032d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &sub ($len,0x20); 1033d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &jbe (&label("even_tail")); 1034d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &jmp (&label("mod_loop")); 1035d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1036d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&set_label("mod_loop",32); 1037d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufd ($T2,$Xi,0b01001110); # H^2*(Ii+Xi) 1038d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($Xhi,$Xi); 1039d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T2,$Xi); # 1040d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &nop (); 1041d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1042d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pclmulqdq ($Xi,$Hkey,0x00); ####### 1043d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pclmulqdq ($Xhi,$Hkey,0x11); ####### 1044d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pclmulqdq ($T2,$T3,0x10); ####### 1045d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movups ($Hkey,&QWP(0,$Htbl)); # load H 1046d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1047d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xorps ($Xi,$Xn); # (H*Ii+1) + H^2*(Ii+Xi) 1048d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T3,&QWP(0,$const)); 1049d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xorps ($Xhi,$Xhn); 1050d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($Xhn,&QWP(0,$inp)); # Ii 1051d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T1,$Xi); # aggregated Karatsuba post-processing 1052d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($Xn,&QWP(16,$inp)); # Ii+1 1053d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T1,$Xhi); # 1054d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1055d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufb ($Xhn,$T3); 1056d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T2,$T1); # 1057d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1058d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T1,$T2); # 1059d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrldq ($T2,8); 1060d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pslldq ($T1,8); # 1061d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xhi,$T2); 1062d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$T1); # 1063d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufb ($Xn,$T3); 1064d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xhi,$Xhn); # "Ii+Xi", consume early 1065d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1066d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($Xhn,$Xn); #&clmul64x64_TX ($Xhn,$Xn,$Hkey); H*Ii+1 1067d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T2,$Xi); #&reduction_alg9($Xhi,$Xi); 1st phase 1068d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T1,$Xi); 1069d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psllq ($Xi,5); 1070d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T1,$Xi); # 1071d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psllq ($Xi,1); 1072d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$T1); # 1073d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pclmulqdq ($Xn,$Hkey,0x00); ####### 1074d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movups ($T3,&QWP(32,$Htbl)); 1075d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psllq ($Xi,57); # 1076d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T1,$Xi); # 1077d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pslldq ($Xi,8); 1078d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrldq ($T1,8); # 1079d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$T2); 1080d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xhi,$T1); # 1081d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufd ($T1,$Xhn,0b01001110); 1082d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T2,$Xi); # 2nd phase 1083d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Xi,1); 1084d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T1,$Xhn); 1085d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xhi,$T2); # 1086d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pclmulqdq ($Xhn,$Hkey,0x11); ####### 1087d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movups ($Hkey,&QWP(16,$Htbl)); # load H^2 1088d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T2,$Xi); 1089d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Xi,5); 1090d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$T2); # 1091d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Xi,1); # 1092d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$Xhi) # 1093d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pclmulqdq ($T1,$T3,0x00); ####### 1094d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1095d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &lea ($inp,&DWP(32,$inp)); 1096d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &sub ($len,0x20); 1097d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &ja (&label("mod_loop")); 1098d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1099d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&set_label("even_tail"); 1100d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufd ($T2,$Xi,0b01001110); # H^2*(Ii+Xi) 1101d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($Xhi,$Xi); 1102d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T2,$Xi); # 1103d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1104d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pclmulqdq ($Xi,$Hkey,0x00); ####### 1105d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pclmulqdq ($Xhi,$Hkey,0x11); ####### 1106d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pclmulqdq ($T2,$T3,0x10); ####### 1107d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T3,&QWP(0,$const)); 1108d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1109d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xorps ($Xi,$Xn); # (H*Ii+1) + H^2*(Ii+Xi) 1110d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xorps ($Xhi,$Xhn); 1111d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T1,$Xi); # aggregated Karatsuba post-processing 1112d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T1,$Xhi); # 1113d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1114d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T2,$T1); # 1115d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1116d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T1,$T2); # 1117d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrldq ($T2,8); 1118d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pslldq ($T1,8); # 1119d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xhi,$T2); 1120d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$T1); # 1121d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1122d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &reduction_alg9 ($Xhi,$Xi); 1123d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1124d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &test ($len,$len); 1125d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &jnz (&label("done")); 1126d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1127d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movups ($Hkey,&QWP(0,$Htbl)); # load H 1128d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&set_label("odd_tail"); 1129d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($T1,&QWP(0,$inp)); # Ii 1130d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufb ($T1,$T3); 1131d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$T1); # Ii+Xi 1132d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1133d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &clmul64x64_T2 ($Xhi,$Xi,$Hkey); # H*(Ii+Xi) 1134d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &reduction_alg9 ($Xhi,$Xi); 1135d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1136d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&set_label("done"); 1137d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufb ($Xi,$T3); 1138d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu (&QWP(0,$Xip),$Xi); 1139d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_end("gcm_ghash_clmul"); 1140d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1141d9e397b599b13d642138480a28c14db7a136bf0Adam Langley} else { # Algorith 5. Kept for reference purposes. 1142d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1143d9e397b599b13d642138480a28c14db7a136bf0Adam Langleysub reduction_alg5 { # 19/16 times faster than Intel version 1144d9e397b599b13d642138480a28c14db7a136bf0Adam Langleymy ($Xhi,$Xi)=@_; 1145d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1146d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # <<1 1147d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T1,$Xi); # 1148d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T2,$Xhi); 1149d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pslld ($Xi,1); 1150d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pslld ($Xhi,1); # 1151d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrld ($T1,31); 1152d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrld ($T2,31); # 1153d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T3,$T1); 1154d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pslldq ($T1,4); 1155d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrldq ($T3,12); # 1156d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pslldq ($T2,4); 1157d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &por ($Xhi,$T3); # 1158d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &por ($Xi,$T1); 1159d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &por ($Xhi,$T2); # 1160d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1161d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # 1st phase 1162d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T1,$Xi); 1163d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T2,$Xi); 1164d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T3,$Xi); # 1165d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pslld ($T1,31); 1166d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pslld ($T2,30); 1167d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pslld ($Xi,25); # 1168d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T1,$T2); 1169d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T1,$Xi); # 1170d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T2,$T1); # 1171d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pslldq ($T1,12); 1172d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrldq ($T2,4); # 1173d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T3,$T1); 1174d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1175d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # 2nd phase 1176d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xhi,$T3); # 1177d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($Xi,$T3); 1178d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T1,$T3); 1179d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrld ($Xi,1); # 1180d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrld ($T1,2); 1181d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrld ($T3,7); # 1182d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$T1); 1183d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xhi,$T2); 1184d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$T3); # 1185d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$Xhi); # 1186d9e397b599b13d642138480a28c14db7a136bf0Adam Langley} 1187d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1188d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_begin_B("gcm_init_clmul"); 1189d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Htbl,&wparam(0)); 1190d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Xip,&wparam(1)); 1191d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1192d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &call (&label("pic")); 1193d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&set_label("pic"); 1194d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &blindpop ($const); 1195d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &lea ($const,&DWP(&label("bswap")."-".&label("pic"),$const)); 1196d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1197d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($Hkey,&QWP(0,$Xip)); 1198d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufd ($Hkey,$Hkey,0b01001110);# dword swap 1199d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1200d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # calculate H^2 1201d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($Xi,$Hkey); 1202d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &clmul64x64_T3 ($Xhi,$Xi,$Hkey); 1203d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &reduction_alg5 ($Xhi,$Xi); 1204d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1205d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu (&QWP(0,$Htbl),$Hkey); # save H 1206d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu (&QWP(16,$Htbl),$Xi); # save H^2 1207d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1208d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &ret (); 1209d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_end_B("gcm_init_clmul"); 1210d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1211d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_begin_B("gcm_gmult_clmul"); 1212d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Xip,&wparam(0)); 1213d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Htbl,&wparam(1)); 1214d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1215d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &call (&label("pic")); 1216d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&set_label("pic"); 1217d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &blindpop ($const); 1218d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &lea ($const,&DWP(&label("bswap")."-".&label("pic"),$const)); 1219d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1220d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($Xi,&QWP(0,$Xip)); 1221d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($Xn,&QWP(0,$const)); 1222d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($Hkey,&QWP(0,$Htbl)); 1223d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufb ($Xi,$Xn); 1224d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1225d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &clmul64x64_T3 ($Xhi,$Xi,$Hkey); 1226d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &reduction_alg5 ($Xhi,$Xi); 1227d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1228d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufb ($Xi,$Xn); 1229d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu (&QWP(0,$Xip),$Xi); 1230d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1231d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &ret (); 1232d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_end_B("gcm_gmult_clmul"); 1233d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1234d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_begin("gcm_ghash_clmul"); 1235d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Xip,&wparam(0)); 1236d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Htbl,&wparam(1)); 1237d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($inp,&wparam(2)); 1238d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($len,&wparam(3)); 1239d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1240d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &call (&label("pic")); 1241d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&set_label("pic"); 1242d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &blindpop ($const); 1243d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &lea ($const,&DWP(&label("bswap")."-".&label("pic"),$const)); 1244d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1245d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($Xi,&QWP(0,$Xip)); 1246d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T3,&QWP(0,$const)); 1247d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($Hkey,&QWP(0,$Htbl)); 1248d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufb ($Xi,$T3); 1249d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1250d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &sub ($len,0x10); 1251d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &jz (&label("odd_tail")); 1252d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1253d9e397b599b13d642138480a28c14db7a136bf0Adam Langley ####### 1254d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # Xi+2 =[H*(Ii+1 + Xi+1)] mod P = 1255d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # [(H*Ii+1) + (H*Xi+1)] mod P = 1256d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # [(H*Ii+1) + H^2*(Ii+Xi)] mod P 1257d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # 1258d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($T1,&QWP(0,$inp)); # Ii 1259d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($Xn,&QWP(16,$inp)); # Ii+1 1260d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufb ($T1,$T3); 1261d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufb ($Xn,$T3); 1262d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$T1); # Ii+Xi 1263d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1264d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &clmul64x64_T3 ($Xhn,$Xn,$Hkey); # H*Ii+1 1265d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($Hkey,&QWP(16,$Htbl)); # load H^2 1266d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1267d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &sub ($len,0x20); 1268d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &lea ($inp,&DWP(32,$inp)); # i+=2 1269d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &jbe (&label("even_tail")); 1270d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1271d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&set_label("mod_loop"); 1272d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &clmul64x64_T3 ($Xhi,$Xi,$Hkey); # H^2*(Ii+Xi) 1273d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($Hkey,&QWP(0,$Htbl)); # load H 1274d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1275d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$Xn); # (H*Ii+1) + H^2*(Ii+Xi) 1276d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xhi,$Xhn); 1277d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1278d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &reduction_alg5 ($Xhi,$Xi); 1279d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1280d9e397b599b13d642138480a28c14db7a136bf0Adam Langley ####### 1281d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T3,&QWP(0,$const)); 1282d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($T1,&QWP(0,$inp)); # Ii 1283d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($Xn,&QWP(16,$inp)); # Ii+1 1284d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufb ($T1,$T3); 1285d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufb ($Xn,$T3); 1286d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$T1); # Ii+Xi 1287d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1288d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &clmul64x64_T3 ($Xhn,$Xn,$Hkey); # H*Ii+1 1289d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($Hkey,&QWP(16,$Htbl)); # load H^2 1290d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1291d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &sub ($len,0x20); 1292d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &lea ($inp,&DWP(32,$inp)); 1293d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &ja (&label("mod_loop")); 1294d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1295d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&set_label("even_tail"); 1296d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &clmul64x64_T3 ($Xhi,$Xi,$Hkey); # H^2*(Ii+Xi) 1297d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1298d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$Xn); # (H*Ii+1) + H^2*(Ii+Xi) 1299d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xhi,$Xhn); 1300d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1301d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &reduction_alg5 ($Xhi,$Xi); 1302d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1303d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T3,&QWP(0,$const)); 1304d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &test ($len,$len); 1305d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &jnz (&label("done")); 1306d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1307d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($Hkey,&QWP(0,$Htbl)); # load H 1308d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&set_label("odd_tail"); 1309d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($T1,&QWP(0,$inp)); # Ii 1310d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufb ($T1,$T3); 1311d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$T1); # Ii+Xi 1312d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1313d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &clmul64x64_T3 ($Xhi,$Xi,$Hkey); # H*(Ii+Xi) 1314d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &reduction_alg5 ($Xhi,$Xi); 1315d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1316d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T3,&QWP(0,$const)); 1317d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&set_label("done"); 1318d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufb ($Xi,$T3); 1319d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu (&QWP(0,$Xip),$Xi); 1320d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_end("gcm_ghash_clmul"); 1321d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1322d9e397b599b13d642138480a28c14db7a136bf0Adam Langley} 1323d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1324d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&set_label("bswap",64); 1325d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_byte(15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0); 1326d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_byte(1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0xc2); # 0x1c2_polynomial 1327d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&set_label("rem_8bit",64); 1328d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x0000,0x01C2,0x0384,0x0246,0x0708,0x06CA,0x048C,0x054E); 1329d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x0E10,0x0FD2,0x0D94,0x0C56,0x0918,0x08DA,0x0A9C,0x0B5E); 1330d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x1C20,0x1DE2,0x1FA4,0x1E66,0x1B28,0x1AEA,0x18AC,0x196E); 1331d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x1230,0x13F2,0x11B4,0x1076,0x1538,0x14FA,0x16BC,0x177E); 1332d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x3840,0x3982,0x3BC4,0x3A06,0x3F48,0x3E8A,0x3CCC,0x3D0E); 1333d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x3650,0x3792,0x35D4,0x3416,0x3158,0x309A,0x32DC,0x331E); 1334d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x2460,0x25A2,0x27E4,0x2626,0x2368,0x22AA,0x20EC,0x212E); 1335d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x2A70,0x2BB2,0x29F4,0x2836,0x2D78,0x2CBA,0x2EFC,0x2F3E); 1336d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x7080,0x7142,0x7304,0x72C6,0x7788,0x764A,0x740C,0x75CE); 1337d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x7E90,0x7F52,0x7D14,0x7CD6,0x7998,0x785A,0x7A1C,0x7BDE); 1338d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x6CA0,0x6D62,0x6F24,0x6EE6,0x6BA8,0x6A6A,0x682C,0x69EE); 1339d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x62B0,0x6372,0x6134,0x60F6,0x65B8,0x647A,0x663C,0x67FE); 1340d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x48C0,0x4902,0x4B44,0x4A86,0x4FC8,0x4E0A,0x4C4C,0x4D8E); 1341d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x46D0,0x4712,0x4554,0x4496,0x41D8,0x401A,0x425C,0x439E); 1342d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x54E0,0x5522,0x5764,0x56A6,0x53E8,0x522A,0x506C,0x51AE); 1343d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x5AF0,0x5B32,0x5974,0x58B6,0x5DF8,0x5C3A,0x5E7C,0x5FBE); 1344d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0xE100,0xE0C2,0xE284,0xE346,0xE608,0xE7CA,0xE58C,0xE44E); 1345d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0xEF10,0xEED2,0xEC94,0xED56,0xE818,0xE9DA,0xEB9C,0xEA5E); 1346d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0xFD20,0xFCE2,0xFEA4,0xFF66,0xFA28,0xFBEA,0xF9AC,0xF86E); 1347d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0xF330,0xF2F2,0xF0B4,0xF176,0xF438,0xF5FA,0xF7BC,0xF67E); 1348d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0xD940,0xD882,0xDAC4,0xDB06,0xDE48,0xDF8A,0xDDCC,0xDC0E); 1349d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0xD750,0xD692,0xD4D4,0xD516,0xD058,0xD19A,0xD3DC,0xD21E); 1350d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0xC560,0xC4A2,0xC6E4,0xC726,0xC268,0xC3AA,0xC1EC,0xC02E); 1351d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0xCB70,0xCAB2,0xC8F4,0xC936,0xCC78,0xCDBA,0xCFFC,0xCE3E); 1352d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x9180,0x9042,0x9204,0x93C6,0x9688,0x974A,0x950C,0x94CE); 1353d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x9F90,0x9E52,0x9C14,0x9DD6,0x9898,0x995A,0x9B1C,0x9ADE); 1354d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x8DA0,0x8C62,0x8E24,0x8FE6,0x8AA8,0x8B6A,0x892C,0x88EE); 1355d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x83B0,0x8272,0x8034,0x81F6,0x84B8,0x857A,0x873C,0x86FE); 1356d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0xA9C0,0xA802,0xAA44,0xAB86,0xAEC8,0xAF0A,0xAD4C,0xAC8E); 1357d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0xA7D0,0xA612,0xA454,0xA596,0xA0D8,0xA11A,0xA35C,0xA29E); 1358d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0xB5E0,0xB422,0xB664,0xB7A6,0xB2E8,0xB32A,0xB16C,0xB0AE); 1359d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0xBBF0,0xBA32,0xB874,0xB9B6,0xBCF8,0xBD3A,0xBF7C,0xBEBE); 1360d9e397b599b13d642138480a28c14db7a136bf0Adam Langley}} # $sse2 1361d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1362d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&set_label("rem_4bit",64); 1363d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_word(0,0x0000<<$S,0,0x1C20<<$S,0,0x3840<<$S,0,0x2460<<$S); 1364d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_word(0,0x7080<<$S,0,0x6CA0<<$S,0,0x48C0<<$S,0,0x54E0<<$S); 1365d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_word(0,0xE100<<$S,0,0xFD20<<$S,0,0xD940<<$S,0,0xC560<<$S); 1366d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_word(0,0x9180<<$S,0,0x8DA0<<$S,0,0xA9C0<<$S,0,0xB5E0<<$S); 1367d9e397b599b13d642138480a28c14db7a136bf0Adam Langley}}} # !$x86only 1368d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1369d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&asciz("GHASH for x86, CRYPTOGAMS by <appro\@openssl.org>"); 1370d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&asm_finish(); 1371d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1372d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# A question was risen about choice of vanilla MMX. Or rather why wasn't 1373d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# SSE2 chosen instead? In addition to the fact that MMX runs on legacy 1374d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# CPUs such as PIII, "4-bit" MMX version was observed to provide better 1375d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# performance than *corresponding* SSE2 one even on contemporary CPUs. 1376d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# SSE2 results were provided by Peter-Michael Hager. He maintains SSE2 1377d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# implementation featuring full range of lookup-table sizes, but with 1378d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# per-invocation lookup table setup. Latter means that table size is 1379d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# chosen depending on how much data is to be hashed in every given call, 1380d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# more data - larger table. Best reported result for Core2 is ~4 cycles 1381d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# per processed byte out of 64KB block. This number accounts even for 1382d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# 64KB table setup overhead. As discussed in gcm128.c we choose to be 1383d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# more conservative in respect to lookup table sizes, but how do the 1384d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# results compare? Minimalistic "256B" MMX version delivers ~11 cycles 1385d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# on same platform. As also discussed in gcm128.c, next in line "8-bit 1386d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# Shoup's" or "4KB" method should deliver twice the performance of 1387d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# "256B" one, in other words not worse than ~6 cycles per byte. It 1388d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# should be also be noted that in SSE2 case improvement can be "super- 1389d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# linear," i.e. more than twice, mostly because >>8 maps to single 1390d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# instruction on SSE2 register. This is unlike "4-bit" case when >>4 1391d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# maps to same amount of instructions in both MMX and SSE2 cases. 1392d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# Bottom line is that switch to SSE2 is considered to be justifiable 1393d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# only in case we choose to implement "8-bit" method... 1394