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 91a94fe0531b3c196ad078174259af2201b2e3a246Robert Sloan# and one of the two multiplications the performance should be between 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=$1; 1299254e681d446a8105bd66f08bae1252d4d89a139Robert Sloanpush(@INC,"${dir}","${dir}../../../perlasm"); 130d9e397b599b13d642138480a28c14db7a136bf0Adam Langleyrequire "x86asm.pl"; 131d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 132c895d6b1c580258e72e1ed3fcc86d38970ded9e1David Benjamin$output=pop; 133c895d6b1c580258e72e1ed3fcc86d38970ded9e1David Benjaminopen STDOUT,">$output"; 134c895d6b1c580258e72e1ed3fcc86d38970ded9e1David Benjamin 1358ff035535f7cf2903f02bbe94d2fa10b7ab855f1Robert Sloan&asm_init($ARGV[0],$x86only = $ARGV[$#ARGV] eq "386"); 136d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 137e9ada863a7b3e81f5d2b1e3bdd2305da902a87f5Adam Langley$sse2=0; 138e9ada863a7b3e81f5d2b1e3bdd2305da902a87f5Adam Langleyfor (@ARGV) { $sse2=1 if (/-DOPENSSL_IA32_SSE2/); } 139d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 140d9e397b599b13d642138480a28c14db7a136bf0Adam Langley($Zhh,$Zhl,$Zlh,$Zll) = ("ebp","edx","ecx","ebx"); 141d9e397b599b13d642138480a28c14db7a136bf0Adam Langley$inp = "edi"; 142d9e397b599b13d642138480a28c14db7a136bf0Adam Langley$Htbl = "esi"; 143d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 144d9e397b599b13d642138480a28c14db7a136bf0Adam Langley$unroll = 0; # Affects x86 loop. Folded loop performs ~7% worse 145d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # than unrolled, which has to be weighted against 146d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # 2.5x x86-specific code size reduction. 147d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 148d9e397b599b13d642138480a28c14db7a136bf0Adam Langleysub x86_loop { 149d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my $off = shift; 150d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my $rem = "eax"; 151d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 152d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Zhh,&DWP(4,$Htbl,$Zll)); 153d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Zhl,&DWP(0,$Htbl,$Zll)); 154d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Zlh,&DWP(12,$Htbl,$Zll)); 155d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Zll,&DWP(8,$Htbl,$Zll)); 156d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ($rem,$rem); # avoid partial register stalls on PIII 157d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 158d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # shrd practically kills P4, 2.5x deterioration, but P4 has 159d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # MMX code-path to execute. shrd runs tad faster [than twice 160d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # the shifts, move's and or's] on pre-MMX Pentium (as well as 161d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # PIII and Core2), *but* minimizes code size, spares register 162d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # and thus allows to fold the loop... 163d9e397b599b13d642138480a28c14db7a136bf0Adam Langley if (!$unroll) { 164d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my $cnt = $inp; 165d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($cnt,15); 166d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &jmp (&label("x86_loop")); 167d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &set_label("x86_loop",16); 168d9e397b599b13d642138480a28c14db7a136bf0Adam Langley for($i=1;$i<=2;$i++) { 169d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&LB($rem),&LB($Zll)); 170d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shrd ($Zll,$Zlh,4); 171d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &and (&LB($rem),0xf); 172d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shrd ($Zlh,$Zhl,4); 173d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shrd ($Zhl,$Zhh,4); 174d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shr ($Zhh,4); 175d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ($Zhh,&DWP($off+16,"esp",$rem,4)); 176d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 177d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&LB($rem),&BP($off,"esp",$cnt)); 178d9e397b599b13d642138480a28c14db7a136bf0Adam Langley if ($i&1) { 179d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &and (&LB($rem),0xf0); 180d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } else { 181d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shl (&LB($rem),4); 182d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 183d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 184d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ($Zll,&DWP(8,$Htbl,$rem)); 185d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ($Zlh,&DWP(12,$Htbl,$rem)); 186d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ($Zhl,&DWP(0,$Htbl,$rem)); 187d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ($Zhh,&DWP(4,$Htbl,$rem)); 188d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 189d9e397b599b13d642138480a28c14db7a136bf0Adam Langley if ($i&1) { 190d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &dec ($cnt); 191d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &js (&label("x86_break")); 192d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } else { 193d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &jmp (&label("x86_loop")); 194d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 195d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 196d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &set_label("x86_break",16); 197d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } else { 198d9e397b599b13d642138480a28c14db7a136bf0Adam Langley for($i=1;$i<32;$i++) { 199d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &comment($i); 200d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&LB($rem),&LB($Zll)); 201d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shrd ($Zll,$Zlh,4); 202d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &and (&LB($rem),0xf); 203d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shrd ($Zlh,$Zhl,4); 204d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shrd ($Zhl,$Zhh,4); 205d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shr ($Zhh,4); 206d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ($Zhh,&DWP($off+16,"esp",$rem,4)); 207d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 208d9e397b599b13d642138480a28c14db7a136bf0Adam Langley if ($i&1) { 209d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&LB($rem),&BP($off+15-($i>>1),"esp")); 210d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &and (&LB($rem),0xf0); 211d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } else { 212d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&LB($rem),&BP($off+15-($i>>1),"esp")); 213d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shl (&LB($rem),4); 214d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 215d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 216d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ($Zll,&DWP(8,$Htbl,$rem)); 217d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ($Zlh,&DWP(12,$Htbl,$rem)); 218d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ($Zhl,&DWP(0,$Htbl,$rem)); 219d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ($Zhh,&DWP(4,$Htbl,$rem)); 220d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 221d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 222d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &bswap ($Zll); 223d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &bswap ($Zlh); 224d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &bswap ($Zhl); 225d9e397b599b13d642138480a28c14db7a136bf0Adam Langley if (!$x86only) { 226d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &bswap ($Zhh); 227d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } else { 228d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ("eax",$Zhh); 229d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &bswap ("eax"); 230d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Zhh,"eax"); 231d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 232d9e397b599b13d642138480a28c14db7a136bf0Adam Langley} 233d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 234d9e397b599b13d642138480a28c14db7a136bf0Adam Langleyif ($unroll) { 235d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &function_begin_B("_x86_gmult_4bit_inner"); 236d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &x86_loop(4); 237d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &ret (); 238d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &function_end_B("_x86_gmult_4bit_inner"); 239d9e397b599b13d642138480a28c14db7a136bf0Adam Langley} 240d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 241d9e397b599b13d642138480a28c14db7a136bf0Adam Langleysub deposit_rem_4bit { 242d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my $bias = shift; 243d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 244d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP($bias+0, "esp"),0x0000<<16); 245d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP($bias+4, "esp"),0x1C20<<16); 246d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP($bias+8, "esp"),0x3840<<16); 247d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP($bias+12,"esp"),0x2460<<16); 248d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP($bias+16,"esp"),0x7080<<16); 249d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP($bias+20,"esp"),0x6CA0<<16); 250d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP($bias+24,"esp"),0x48C0<<16); 251d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP($bias+28,"esp"),0x54E0<<16); 252d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP($bias+32,"esp"),0xE100<<16); 253d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP($bias+36,"esp"),0xFD20<<16); 254d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP($bias+40,"esp"),0xD940<<16); 255d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP($bias+44,"esp"),0xC560<<16); 256d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP($bias+48,"esp"),0x9180<<16); 257d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP($bias+52,"esp"),0x8DA0<<16); 258d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP($bias+56,"esp"),0xA9C0<<16); 259d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP($bias+60,"esp"),0xB5E0<<16); 260d9e397b599b13d642138480a28c14db7a136bf0Adam Langley} 261d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 262d9e397b599b13d642138480a28c14db7a136bf0Adam Langleyif (!$x86only) {{{ 263d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 264d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&static_label("rem_4bit"); 265d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 266d9e397b599b13d642138480a28c14db7a136bf0Adam Langleyif (!$sse2) {{ # pure-MMX "May" version... 267d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 268b0b45c63bbbf16b7f5ff3cbe3f1d0905108038aaSteven Valdez # This code was removed since SSE2 is required for BoringSSL. The 269b0b45c63bbbf16b7f5ff3cbe3f1d0905108038aaSteven Valdez # outer structure of the code was retained to minimize future merge 270b0b45c63bbbf16b7f5ff3cbe3f1d0905108038aaSteven Valdez # conflicts. 271d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 272d9e397b599b13d642138480a28c14db7a136bf0Adam Langley}} else {{ # "June" MMX version... 273d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # ... has slower "April" gcm_gmult_4bit_mmx with folded 274d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # loop. This is done to conserve code size... 275d9e397b599b13d642138480a28c14db7a136bf0Adam Langley$S=16; # shift factor for rem_4bit 276d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 277d9e397b599b13d642138480a28c14db7a136bf0Adam Langleysub mmx_loop() { 278d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# MMX version performs 2.8 times better on P4 (see comment in non-MMX 279d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# routine for further details), 40% better on Opteron and Core2, 50% 280d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# better on PIII... In other words effort is considered to be well 281d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# spent... 282d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my $inp = shift; 283d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my $rem_4bit = shift; 284d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my $cnt = $Zhh; 285d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my $nhi = $Zhl; 286d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my $nlo = $Zlh; 287d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my $rem = $Zll; 288d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 289d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my ($Zlo,$Zhi) = ("mm0","mm1"); 290d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my $tmp = "mm2"; 291d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 292d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ($nlo,$nlo); # avoid partial register stalls on PIII 293d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($nhi,$Zll); 294d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&LB($nlo),&LB($nhi)); 295d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($cnt,14); 296d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shl (&LB($nlo),4); 297d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &and ($nhi,0xf0); 298d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq ($Zlo,&QWP(8,$Htbl,$nlo)); 299d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq ($Zhi,&QWP(0,$Htbl,$nlo)); 300d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movd ($rem,$Zlo); 301d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &jmp (&label("mmx_loop")); 302d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 303d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &set_label("mmx_loop",16); 304d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Zlo,4); 305d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &and ($rem,0xf); 306d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq ($tmp,$Zhi); 307d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Zhi,4); 308d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zlo,&QWP(8,$Htbl,$nhi)); 309d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&LB($nlo),&BP(0,$inp,$cnt)); 310d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psllq ($tmp,60); 311d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zhi,&QWP(0,$rem_4bit,$rem,8)); 312d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &dec ($cnt); 313d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movd ($rem,$Zlo); 314d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zhi,&QWP(0,$Htbl,$nhi)); 315d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($nhi,$nlo); 316d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zlo,$tmp); 317d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &js (&label("mmx_break")); 318d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 319d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shl (&LB($nlo),4); 320d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &and ($rem,0xf); 321d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Zlo,4); 322d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &and ($nhi,0xf0); 323d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq ($tmp,$Zhi); 324d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Zhi,4); 325d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zlo,&QWP(8,$Htbl,$nlo)); 326d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psllq ($tmp,60); 327d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zhi,&QWP(0,$rem_4bit,$rem,8)); 328d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movd ($rem,$Zlo); 329d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zhi,&QWP(0,$Htbl,$nlo)); 330d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zlo,$tmp); 331d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &jmp (&label("mmx_loop")); 332d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 333d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &set_label("mmx_break",16); 334d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shl (&LB($nlo),4); 335d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &and ($rem,0xf); 336d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Zlo,4); 337d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &and ($nhi,0xf0); 338d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq ($tmp,$Zhi); 339d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Zhi,4); 340d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zlo,&QWP(8,$Htbl,$nlo)); 341d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psllq ($tmp,60); 342d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zhi,&QWP(0,$rem_4bit,$rem,8)); 343d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movd ($rem,$Zlo); 344d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zhi,&QWP(0,$Htbl,$nlo)); 345d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zlo,$tmp); 346d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 347d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Zlo,4); 348d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &and ($rem,0xf); 349d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq ($tmp,$Zhi); 350d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Zhi,4); 351d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zlo,&QWP(8,$Htbl,$nhi)); 352d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psllq ($tmp,60); 353d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zhi,&QWP(0,$rem_4bit,$rem,8)); 354d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movd ($rem,$Zlo); 355d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zhi,&QWP(0,$Htbl,$nhi)); 356d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zlo,$tmp); 357d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 358d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Zlo,32); # lower part of Zlo is already there 359d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movd ($Zhl,$Zhi); 360d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Zhi,32); 361d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movd ($Zlh,$Zlo); 362d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movd ($Zhh,$Zhi); 363d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 364d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &bswap ($Zll); 365d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &bswap ($Zhl); 366d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &bswap ($Zlh); 367d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &bswap ($Zhh); 368d9e397b599b13d642138480a28c14db7a136bf0Adam Langley} 369d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 370d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_begin("gcm_gmult_4bit_mmx"); 371d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($inp,&wparam(0)); # load Xi 372d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Htbl,&wparam(1)); # load Htable 373d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 374d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &call (&label("pic_point")); 375d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &set_label("pic_point"); 376d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &blindpop("eax"); 377d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &lea ("eax",&DWP(&label("rem_4bit")."-".&label("pic_point"),"eax")); 378d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 379d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movz ($Zll,&BP(15,$inp)); 380d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 381d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mmx_loop($inp,"eax"); 382d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 383d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &emms (); 384d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(12,$inp),$Zll); 385d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(4,$inp),$Zhl); 386d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(8,$inp),$Zlh); 387d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(0,$inp),$Zhh); 388d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_end("gcm_gmult_4bit_mmx"); 389d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 390d9e397b599b13d642138480a28c14db7a136bf0Adam Langley###################################################################### 391d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# Below subroutine is "528B" variant of "4-bit" GCM GHASH function 392d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# (see gcm128.c for details). It provides further 20-40% performance 393d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# improvement over above mentioned "May" version. 394d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 395d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&static_label("rem_8bit"); 396d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 397d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_begin("gcm_ghash_4bit_mmx"); 398d9e397b599b13d642138480a28c14db7a136bf0Adam Langley{ my ($Zlo,$Zhi) = ("mm7","mm6"); 399d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my $rem_8bit = "esi"; 400d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my $Htbl = "ebx"; 401d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 402d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # parameter block 403d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ("eax",&wparam(0)); # Xi 404d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ("ebx",&wparam(1)); # Htable 405d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ("ecx",&wparam(2)); # inp 406d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ("edx",&wparam(3)); # len 407d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ("ebp","esp"); # original %esp 408d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &call (&label("pic_point")); 409d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &set_label ("pic_point"); 410d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &blindpop ($rem_8bit); 411d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &lea ($rem_8bit,&DWP(&label("rem_8bit")."-".&label("pic_point"),$rem_8bit)); 412d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 413d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &sub ("esp",512+16+16); # allocate stack frame... 414d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &and ("esp",-64); # ...and align it 415d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &sub ("esp",16); # place for (u8)(H[]<<4) 416d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 417d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &add ("edx","ecx"); # pointer to the end of input 418d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(528+16+0,"esp"),"eax"); # save Xi 419d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(528+16+8,"esp"),"edx"); # save inp+len 420d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(528+16+12,"esp"),"ebp"); # save original %esp 421d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 422d9e397b599b13d642138480a28c14db7a136bf0Adam Langley { my @lo = ("mm0","mm1","mm2"); 423d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my @hi = ("mm3","mm4","mm5"); 424d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my @tmp = ("mm6","mm7"); 425d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my ($off1,$off2,$i) = (0,0,); 426d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 427d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &add ($Htbl,128); # optimize for size 428d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &lea ("edi",&DWP(16+128,"esp")); 429d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &lea ("ebp",&DWP(16+256+128,"esp")); 430d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 431d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # decompose Htable (low and high parts are kept separately), 432d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # generate Htable[]>>4, (u8)(Htable[]<<4), save to stack... 433d9e397b599b13d642138480a28c14db7a136bf0Adam Langley for ($i=0;$i<18;$i++) { 434d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 435d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ("edx",&DWP(16*$i+8-128,$Htbl)) if ($i<16); 436d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq ($lo[0],&QWP(16*$i+8-128,$Htbl)) if ($i<16); 437d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psllq ($tmp[1],60) if ($i>1); 438d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq ($hi[0],&QWP(16*$i+0-128,$Htbl)) if ($i<16); 439d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &por ($lo[2],$tmp[1]) if ($i>1); 440d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq (&QWP($off1-128,"edi"),$lo[1]) if ($i>0 && $i<17); 441d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($lo[1],4) if ($i>0 && $i<17); 442d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq (&QWP($off1,"edi"),$hi[1]) if ($i>0 && $i<17); 443d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq ($tmp[0],$hi[1]) if ($i>0 && $i<17); 444d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq (&QWP($off2-128,"ebp"),$lo[2]) if ($i>1); 445d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($hi[1],4) if ($i>0 && $i<17); 446d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq (&QWP($off2,"ebp"),$hi[2]) if ($i>1); 447d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shl ("edx",4) if ($i<16); 448d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&BP($i,"esp"),&LB("edx")) if ($i<16); 449d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 450d9e397b599b13d642138480a28c14db7a136bf0Adam Langley unshift (@lo,pop(@lo)); # "rotate" registers 451d9e397b599b13d642138480a28c14db7a136bf0Adam Langley unshift (@hi,pop(@hi)); 452d9e397b599b13d642138480a28c14db7a136bf0Adam Langley unshift (@tmp,pop(@tmp)); 453d9e397b599b13d642138480a28c14db7a136bf0Adam Langley $off1 += 8 if ($i>0); 454d9e397b599b13d642138480a28c14db7a136bf0Adam Langley $off2 += 8 if ($i>1); 455d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 456d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 457d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 458d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq ($Zhi,&QWP(0,"eax")); 459d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ("ebx",&DWP(8,"eax")); 460d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ("edx",&DWP(12,"eax")); # load Xi 461d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 462d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&set_label("outer",16); 463d9e397b599b13d642138480a28c14db7a136bf0Adam Langley { my $nlo = "eax"; 464d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my $dat = "edx"; 465d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my @nhi = ("edi","ebp"); 466d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my @rem = ("ebx","ecx"); 467d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my @red = ("mm0","mm1","mm2"); 468d9e397b599b13d642138480a28c14db7a136bf0Adam Langley my $tmp = "mm3"; 469d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 470d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ($dat,&DWP(12,"ecx")); # merge input data 471d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ("ebx",&DWP(8,"ecx")); 472d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zhi,&QWP(0,"ecx")); 473d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &lea ("ecx",&DWP(16,"ecx")); # inp+=16 474d9e397b599b13d642138480a28c14db7a136bf0Adam Langley #&mov (&DWP(528+12,"esp"),$dat); # save inp^Xi 475d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(528+8,"esp"),"ebx"); 476d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq (&QWP(528+0,"esp"),$Zhi); 477d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(528+16+4,"esp"),"ecx"); # save inp 478d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 479d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor ($nlo,$nlo); 480d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &rol ($dat,8); 481d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&LB($nlo),&LB($dat)); 482d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($nhi[1],$nlo); 483d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &and (&LB($nlo),0x0f); 484d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shr ($nhi[1],4); 485d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($red[0],$red[0]); 486d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &rol ($dat,8); # next byte 487d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($red[1],$red[1]); 488d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($red[2],$red[2]); 489d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 490a94fe0531b3c196ad078174259af2201b2e3a246Robert Sloan # Just like in "May" version modulo-schedule for critical path in 491d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # 'Z.hi ^= rem_8bit[Z.lo&0xff^((u8)H[nhi]<<4)]<<48'. Final 'pxor' 492d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # is scheduled so late that rem_8bit[] has to be shifted *right* 493d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # by 16, which is why last argument to pinsrw is 2, which 494d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # corresponds to <<32=<<48>>16... 495d9e397b599b13d642138480a28c14db7a136bf0Adam Langley for ($j=11,$i=0;$i<15;$i++) { 496d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 497d9e397b599b13d642138480a28c14db7a136bf0Adam Langley if ($i>0) { 498d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zlo,&QWP(16,"esp",$nlo,8)); # Z^=H[nlo] 499d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &rol ($dat,8); # next byte 500d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zhi,&QWP(16+128,"esp",$nlo,8)); 501d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 502d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zlo,$tmp); 503d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zhi,&QWP(16+256+128,"esp",$nhi[0],8)); 504d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor (&LB($rem[1]),&BP(0,"esp",$nhi[0])); # rem^(H[nhi]<<4) 505d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } else { 506d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq ($Zlo,&QWP(16,"esp",$nlo,8)); 507d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq ($Zhi,&QWP(16+128,"esp",$nlo,8)); 508d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 509d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 510d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&LB($nlo),&LB($dat)); 511d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($dat,&DWP(528+$j,"esp")) if (--$j%4==0); 512d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 513d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movd ($rem[0],$Zlo); 514d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movz ($rem[1],&LB($rem[1])) if ($i>0); 515d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Zlo,8); # Z>>=8 516d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 517d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq ($tmp,$Zhi); 518d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($nhi[0],$nlo); 519d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Zhi,8); 520d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 521d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zlo,&QWP(16+256+0,"esp",$nhi[1],8)); # Z^=H[nhi]>>4 522d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &and (&LB($nlo),0x0f); 523d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psllq ($tmp,56); 524d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 525d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zhi,$red[1]) if ($i>1); 526d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shr ($nhi[0],4); 527d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pinsrw ($red[0],&WP(0,$rem_8bit,$rem[1],2),2) if ($i>0); 528d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 529d9e397b599b13d642138480a28c14db7a136bf0Adam Langley unshift (@red,pop(@red)); # "rotate" registers 530d9e397b599b13d642138480a28c14db7a136bf0Adam Langley unshift (@rem,pop(@rem)); 531d9e397b599b13d642138480a28c14db7a136bf0Adam Langley unshift (@nhi,pop(@nhi)); 532d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 533d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 534d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zlo,&QWP(16,"esp",$nlo,8)); # Z^=H[nlo] 535d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zhi,&QWP(16+128,"esp",$nlo,8)); 536d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xor (&LB($rem[1]),&BP(0,"esp",$nhi[0])); # rem^(H[nhi]<<4) 537d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 538d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zlo,$tmp); 539d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zhi,&QWP(16+256+128,"esp",$nhi[0],8)); 540d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movz ($rem[1],&LB($rem[1])); 541d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 542d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($red[2],$red[2]); # clear 2nd word 543d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psllq ($red[1],4); 544d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 545d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movd ($rem[0],$Zlo); 546d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Zlo,4); # Z>>=4 547d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 548d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq ($tmp,$Zhi); 549d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Zhi,4); 550d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &shl ($rem[0],4); # rem<<4 551d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 552d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zlo,&QWP(16,"esp",$nhi[1],8)); # Z^=H[nhi] 553d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psllq ($tmp,60); 554d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movz ($rem[0],&LB($rem[0])); 555d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 556d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zlo,$tmp); 557d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zhi,&QWP(16+128,"esp",$nhi[1],8)); 558d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 559d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pinsrw ($red[0],&WP(0,$rem_8bit,$rem[1],2),2); 560d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zhi,$red[1]); 561d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 562d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movd ($dat,$Zlo); 563d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pinsrw ($red[2],&WP(0,$rem_8bit,$rem[0],2),3); # last is <<48 564d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 565d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psllq ($red[0],12); # correct by <<16>>4 566d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zhi,$red[0]); 567d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Zlo,32); 568d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Zhi,$red[2]); 569d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 570d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ("ecx",&DWP(528+16+4,"esp")); # restore inp 571d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movd ("ebx",$Zlo); 572d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq ($tmp,$Zhi); # 01234567 573d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psllw ($Zhi,8); # 1.3.5.7. 574d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlw ($tmp,8); # .0.2.4.6 575d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &por ($Zhi,$tmp); # 10325476 576d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &bswap ($dat); 577d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufw ($Zhi,$Zhi,0b00011011); # 76543210 578d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &bswap ("ebx"); 579a94fe0531b3c196ad078174259af2201b2e3a246Robert Sloan 580d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &cmp ("ecx",&DWP(528+16+8,"esp")); # are we done? 581d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &jne (&label("outer")); 582d9e397b599b13d642138480a28c14db7a136bf0Adam Langley } 583d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 584d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ("eax",&DWP(528+16+0,"esp")); # restore Xi 585d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(12,"eax"),"edx"); 586d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov (&DWP(8,"eax"),"ebx"); 587d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movq (&QWP(0,"eax"),$Zhi); 588d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 589d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ("esp",&DWP(528+16+12,"esp")); # restore original %esp 590d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &emms (); 591d9e397b599b13d642138480a28c14db7a136bf0Adam Langley} 592d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_end("gcm_ghash_4bit_mmx"); 593d9e397b599b13d642138480a28c14db7a136bf0Adam Langley}} 594d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 595d9e397b599b13d642138480a28c14db7a136bf0Adam Langleyif ($sse2) {{ 596d9e397b599b13d642138480a28c14db7a136bf0Adam Langley###################################################################### 597d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# PCLMULQDQ version. 598d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 599d9e397b599b13d642138480a28c14db7a136bf0Adam Langley$Xip="eax"; 600d9e397b599b13d642138480a28c14db7a136bf0Adam Langley$Htbl="edx"; 601d9e397b599b13d642138480a28c14db7a136bf0Adam Langley$const="ecx"; 602d9e397b599b13d642138480a28c14db7a136bf0Adam Langley$inp="esi"; 603d9e397b599b13d642138480a28c14db7a136bf0Adam Langley$len="ebx"; 604d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 605d9e397b599b13d642138480a28c14db7a136bf0Adam Langley($Xi,$Xhi)=("xmm0","xmm1"); $Hkey="xmm2"; 606d9e397b599b13d642138480a28c14db7a136bf0Adam Langley($T1,$T2,$T3)=("xmm3","xmm4","xmm5"); 607d9e397b599b13d642138480a28c14db7a136bf0Adam Langley($Xn,$Xhn)=("xmm6","xmm7"); 608d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 609d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&static_label("bswap"); 610d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 611d9e397b599b13d642138480a28c14db7a136bf0Adam Langleysub clmul64x64_T2 { # minimal "register" pressure 612d9e397b599b13d642138480a28c14db7a136bf0Adam Langleymy ($Xhi,$Xi,$Hkey,$HK)=@_; 613d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 614d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($Xhi,$Xi); # 615d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufd ($T1,$Xi,0b01001110); 616d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufd ($T2,$Hkey,0b01001110) if (!defined($HK)); 617d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T1,$Xi); # 618d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T2,$Hkey) if (!defined($HK)); 619d9e397b599b13d642138480a28c14db7a136bf0Adam Langley $HK=$T2 if (!defined($HK)); 620d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 621d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pclmulqdq ($Xi,$Hkey,0x00); ####### 622d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pclmulqdq ($Xhi,$Hkey,0x11); ####### 623d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pclmulqdq ($T1,$HK,0x00); ####### 624d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xorps ($T1,$Xi); # 625d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xorps ($T1,$Xhi); # 626d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 627d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T2,$T1); # 628d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrldq ($T1,8); 629d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pslldq ($T2,8); # 630d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xhi,$T1); 631d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$T2); # 632d9e397b599b13d642138480a28c14db7a136bf0Adam Langley} 633d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 634d9e397b599b13d642138480a28c14db7a136bf0Adam Langleysub clmul64x64_T3 { 635d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# Even though this subroutine offers visually better ILP, it 636d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# was empirically found to be a tad slower than above version. 637d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# At least in gcm_ghash_clmul context. But it's just as well, 638d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# because loop modulo-scheduling is possible only thanks to 639d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# minimized "register" pressure... 640d9e397b599b13d642138480a28c14db7a136bf0Adam Langleymy ($Xhi,$Xi,$Hkey)=@_; 641d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 642d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T1,$Xi); # 643d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($Xhi,$Xi); 644d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pclmulqdq ($Xi,$Hkey,0x00); ####### 645d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pclmulqdq ($Xhi,$Hkey,0x11); ####### 646d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufd ($T2,$T1,0b01001110); # 647d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufd ($T3,$Hkey,0b01001110); 648d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T2,$T1); # 649d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T3,$Hkey); 650d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pclmulqdq ($T2,$T3,0x00); ####### 651d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T2,$Xi); # 652d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T2,$Xhi); # 653d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 654d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T3,$T2); # 655d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrldq ($T2,8); 656d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pslldq ($T3,8); # 657d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xhi,$T2); 658d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$T3); # 659d9e397b599b13d642138480a28c14db7a136bf0Adam Langley} 660d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 661d9e397b599b13d642138480a28c14db7a136bf0Adam Langleyif (1) { # Algorithm 9 with <<1 twist. 662d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # Reduction is shorter and uses only two 663d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # temporary registers, which makes it better 664d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # candidate for interleaving with 64x64 665d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # multiplication. Pre-modulo-scheduled loop 666d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # was found to be ~20% faster than Algorithm 5 667d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # below. Algorithm 9 was therefore chosen for 668d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # further optimization... 669d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 670d9e397b599b13d642138480a28c14db7a136bf0Adam Langleysub reduction_alg9 { # 17/11 times faster than Intel version 671d9e397b599b13d642138480a28c14db7a136bf0Adam Langleymy ($Xhi,$Xi) = @_; 672d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 673d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # 1st phase 674d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T2,$Xi); # 675d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T1,$Xi); 676d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psllq ($Xi,5); 677d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T1,$Xi); # 678d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psllq ($Xi,1); 679d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$T1); # 680d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psllq ($Xi,57); # 681d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T1,$Xi); # 682d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pslldq ($Xi,8); 683a94fe0531b3c196ad078174259af2201b2e3a246Robert Sloan &psrldq ($T1,8); # 684d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$T2); 685d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xhi,$T1); # 686d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 687d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # 2nd phase 688d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T2,$Xi); 689d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Xi,1); 690d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xhi,$T2); # 691d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T2,$Xi); 692d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Xi,5); 693d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$T2); # 694d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Xi,1); # 695d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$Xhi) # 696d9e397b599b13d642138480a28c14db7a136bf0Adam Langley} 697d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 698d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_begin_B("gcm_init_clmul"); 699d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Htbl,&wparam(0)); 700d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Xip,&wparam(1)); 701d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 702d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &call (&label("pic")); 703d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&set_label("pic"); 704d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &blindpop ($const); 705d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &lea ($const,&DWP(&label("bswap")."-".&label("pic"),$const)); 706d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 707d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($Hkey,&QWP(0,$Xip)); 708d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufd ($Hkey,$Hkey,0b01001110);# dword swap 709d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 710d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # <<1 twist 711d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufd ($T2,$Hkey,0b11111111); # broadcast uppermost dword 712d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T1,$Hkey); 713d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psllq ($Hkey,1); 714d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T3,$T3); # 715d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($T1,63); 716d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pcmpgtd ($T3,$T2); # broadcast carry bit 717d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pslldq ($T1,8); 718d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &por ($Hkey,$T1); # H<<=1 719d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 720d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # magic reduction 721d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pand ($T3,&QWP(16,$const)); # 0x1c2_polynomial 722d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Hkey,$T3); # if(carry) H^=0x1c2_polynomial 723d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 724d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # calculate H^2 725d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($Xi,$Hkey); 726d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &clmul64x64_T2 ($Xhi,$Xi,$Hkey); 727d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &reduction_alg9 ($Xhi,$Xi); 728d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 729d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufd ($T1,$Hkey,0b01001110); 730d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufd ($T2,$Xi,0b01001110); 731d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T1,$Hkey); # Karatsuba pre-processing 732d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu (&QWP(0,$Htbl),$Hkey); # save H 733d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T2,$Xi); # Karatsuba pre-processing 734d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu (&QWP(16,$Htbl),$Xi); # save H^2 735d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &palignr ($T2,$T1,8); # low part is H.lo^H.hi 736d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu (&QWP(32,$Htbl),$T2); # save Karatsuba "salt" 737d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 738d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &ret (); 739d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_end_B("gcm_init_clmul"); 740d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 741d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_begin_B("gcm_gmult_clmul"); 742d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Xip,&wparam(0)); 743d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Htbl,&wparam(1)); 744d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 745d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &call (&label("pic")); 746d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&set_label("pic"); 747d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &blindpop ($const); 748d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &lea ($const,&DWP(&label("bswap")."-".&label("pic"),$const)); 749d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 750d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($Xi,&QWP(0,$Xip)); 751d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T3,&QWP(0,$const)); 752d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movups ($Hkey,&QWP(0,$Htbl)); 753d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufb ($Xi,$T3); 754d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movups ($T2,&QWP(32,$Htbl)); 755d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 756d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &clmul64x64_T2 ($Xhi,$Xi,$Hkey,$T2); 757d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &reduction_alg9 ($Xhi,$Xi); 758d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 759d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufb ($Xi,$T3); 760d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu (&QWP(0,$Xip),$Xi); 761d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 762d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &ret (); 763d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_end_B("gcm_gmult_clmul"); 764d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 765d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_begin("gcm_ghash_clmul"); 766d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Xip,&wparam(0)); 767d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Htbl,&wparam(1)); 768d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($inp,&wparam(2)); 769d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($len,&wparam(3)); 770d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 771d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &call (&label("pic")); 772d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&set_label("pic"); 773d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &blindpop ($const); 774d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &lea ($const,&DWP(&label("bswap")."-".&label("pic"),$const)); 775d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 776d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($Xi,&QWP(0,$Xip)); 777d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T3,&QWP(0,$const)); 778d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($Hkey,&QWP(0,$Htbl)); 779d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufb ($Xi,$T3); 780d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 781d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &sub ($len,0x10); 782d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &jz (&label("odd_tail")); 783d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 784d9e397b599b13d642138480a28c14db7a136bf0Adam Langley ####### 785d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # Xi+2 =[H*(Ii+1 + Xi+1)] mod P = 786d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # [(H*Ii+1) + (H*Xi+1)] mod P = 787d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # [(H*Ii+1) + H^2*(Ii+Xi)] mod P 788d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # 789d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($T1,&QWP(0,$inp)); # Ii 790d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($Xn,&QWP(16,$inp)); # Ii+1 791d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufb ($T1,$T3); 792d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufb ($Xn,$T3); 793d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($T3,&QWP(32,$Htbl)); 794d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$T1); # Ii+Xi 795d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 796d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufd ($T1,$Xn,0b01001110); # H*Ii+1 797d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($Xhn,$Xn); 798d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T1,$Xn); # 799d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &lea ($inp,&DWP(32,$inp)); # i+=2 800d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 801d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pclmulqdq ($Xn,$Hkey,0x00); ####### 802d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pclmulqdq ($Xhn,$Hkey,0x11); ####### 803d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pclmulqdq ($T1,$T3,0x00); ####### 804d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movups ($Hkey,&QWP(16,$Htbl)); # load H^2 805d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &nop (); 806d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 807d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &sub ($len,0x20); 808d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &jbe (&label("even_tail")); 809d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &jmp (&label("mod_loop")); 810d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 811d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&set_label("mod_loop",32); 812d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufd ($T2,$Xi,0b01001110); # H^2*(Ii+Xi) 813d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($Xhi,$Xi); 814d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T2,$Xi); # 815d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &nop (); 816d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 817d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pclmulqdq ($Xi,$Hkey,0x00); ####### 818d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pclmulqdq ($Xhi,$Hkey,0x11); ####### 819d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pclmulqdq ($T2,$T3,0x10); ####### 820d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movups ($Hkey,&QWP(0,$Htbl)); # load H 821d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 822d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xorps ($Xi,$Xn); # (H*Ii+1) + H^2*(Ii+Xi) 823d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T3,&QWP(0,$const)); 824d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xorps ($Xhi,$Xhn); 825d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($Xhn,&QWP(0,$inp)); # Ii 826d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T1,$Xi); # aggregated Karatsuba post-processing 827d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($Xn,&QWP(16,$inp)); # Ii+1 828d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T1,$Xhi); # 829d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 830d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufb ($Xhn,$T3); 831d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T2,$T1); # 832d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 833d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T1,$T2); # 834d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrldq ($T2,8); 835d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pslldq ($T1,8); # 836d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xhi,$T2); 837d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$T1); # 838d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufb ($Xn,$T3); 839d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xhi,$Xhn); # "Ii+Xi", consume early 840d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 841d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($Xhn,$Xn); #&clmul64x64_TX ($Xhn,$Xn,$Hkey); H*Ii+1 842d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T2,$Xi); #&reduction_alg9($Xhi,$Xi); 1st phase 843d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T1,$Xi); 844d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psllq ($Xi,5); 845d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T1,$Xi); # 846d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psllq ($Xi,1); 847d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$T1); # 848d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pclmulqdq ($Xn,$Hkey,0x00); ####### 849d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movups ($T3,&QWP(32,$Htbl)); 850d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psllq ($Xi,57); # 851d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T1,$Xi); # 852d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pslldq ($Xi,8); 853a94fe0531b3c196ad078174259af2201b2e3a246Robert Sloan &psrldq ($T1,8); # 854d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$T2); 855d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xhi,$T1); # 856d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufd ($T1,$Xhn,0b01001110); 857d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T2,$Xi); # 2nd phase 858d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Xi,1); 859d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T1,$Xhn); 860d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xhi,$T2); # 861d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pclmulqdq ($Xhn,$Hkey,0x11); ####### 862d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movups ($Hkey,&QWP(16,$Htbl)); # load H^2 863d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T2,$Xi); 864d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Xi,5); 865d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$T2); # 866d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrlq ($Xi,1); # 867d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$Xhi) # 868d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pclmulqdq ($T1,$T3,0x00); ####### 869d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 870d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &lea ($inp,&DWP(32,$inp)); 871d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &sub ($len,0x20); 872d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &ja (&label("mod_loop")); 873d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 874d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&set_label("even_tail"); 875d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufd ($T2,$Xi,0b01001110); # H^2*(Ii+Xi) 876d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($Xhi,$Xi); 877d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T2,$Xi); # 878d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 879d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pclmulqdq ($Xi,$Hkey,0x00); ####### 880d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pclmulqdq ($Xhi,$Hkey,0x11); ####### 881d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pclmulqdq ($T2,$T3,0x10); ####### 882d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T3,&QWP(0,$const)); 883d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 884d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xorps ($Xi,$Xn); # (H*Ii+1) + H^2*(Ii+Xi) 885d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &xorps ($Xhi,$Xhn); 886d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T1,$Xi); # aggregated Karatsuba post-processing 887d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T1,$Xhi); # 888d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 889d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T2,$T1); # 890d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 891d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T1,$T2); # 892d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrldq ($T2,8); 893d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pslldq ($T1,8); # 894d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xhi,$T2); 895d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$T1); # 896d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 897d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &reduction_alg9 ($Xhi,$Xi); 898d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 899d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &test ($len,$len); 900d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &jnz (&label("done")); 901d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 902d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movups ($Hkey,&QWP(0,$Htbl)); # load H 903d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&set_label("odd_tail"); 904d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($T1,&QWP(0,$inp)); # Ii 905d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufb ($T1,$T3); 906d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$T1); # Ii+Xi 907d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 908d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &clmul64x64_T2 ($Xhi,$Xi,$Hkey); # H*(Ii+Xi) 909d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &reduction_alg9 ($Xhi,$Xi); 910d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 911d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&set_label("done"); 912d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufb ($Xi,$T3); 913d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu (&QWP(0,$Xip),$Xi); 914d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_end("gcm_ghash_clmul"); 915d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 916a94fe0531b3c196ad078174259af2201b2e3a246Robert Sloan} else { # Algorithm 5. Kept for reference purposes. 917d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 918d9e397b599b13d642138480a28c14db7a136bf0Adam Langleysub reduction_alg5 { # 19/16 times faster than Intel version 919d9e397b599b13d642138480a28c14db7a136bf0Adam Langleymy ($Xhi,$Xi)=@_; 920d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 921d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # <<1 922d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T1,$Xi); # 923d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T2,$Xhi); 924d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pslld ($Xi,1); 925d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pslld ($Xhi,1); # 926d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrld ($T1,31); 927d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrld ($T2,31); # 928d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T3,$T1); 929d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pslldq ($T1,4); 930d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrldq ($T3,12); # 931d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pslldq ($T2,4); 932d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &por ($Xhi,$T3); # 933d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &por ($Xi,$T1); 934d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &por ($Xhi,$T2); # 935d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 936d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # 1st phase 937d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T1,$Xi); 938d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T2,$Xi); 939d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T3,$Xi); # 940d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pslld ($T1,31); 941d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pslld ($T2,30); 942d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pslld ($Xi,25); # 943d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T1,$T2); 944d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T1,$Xi); # 945d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T2,$T1); # 946d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pslldq ($T1,12); 947d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrldq ($T2,4); # 948d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($T3,$T1); 949d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 950d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # 2nd phase 951d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xhi,$T3); # 952d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($Xi,$T3); 953d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T1,$T3); 954d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrld ($Xi,1); # 955d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrld ($T1,2); 956d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &psrld ($T3,7); # 957d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$T1); 958d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xhi,$T2); 959d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$T3); # 960d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$Xhi); # 961d9e397b599b13d642138480a28c14db7a136bf0Adam Langley} 962d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 963d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_begin_B("gcm_init_clmul"); 964d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Htbl,&wparam(0)); 965d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Xip,&wparam(1)); 966d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 967d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &call (&label("pic")); 968d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&set_label("pic"); 969d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &blindpop ($const); 970d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &lea ($const,&DWP(&label("bswap")."-".&label("pic"),$const)); 971d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 972d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($Hkey,&QWP(0,$Xip)); 973d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufd ($Hkey,$Hkey,0b01001110);# dword swap 974d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 975d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # calculate H^2 976d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($Xi,$Hkey); 977d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &clmul64x64_T3 ($Xhi,$Xi,$Hkey); 978d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &reduction_alg5 ($Xhi,$Xi); 979d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 980d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu (&QWP(0,$Htbl),$Hkey); # save H 981d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu (&QWP(16,$Htbl),$Xi); # save H^2 982d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 983d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &ret (); 984d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_end_B("gcm_init_clmul"); 985d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 986d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_begin_B("gcm_gmult_clmul"); 987d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Xip,&wparam(0)); 988d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Htbl,&wparam(1)); 989d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 990d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &call (&label("pic")); 991d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&set_label("pic"); 992d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &blindpop ($const); 993d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &lea ($const,&DWP(&label("bswap")."-".&label("pic"),$const)); 994d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 995d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($Xi,&QWP(0,$Xip)); 996d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($Xn,&QWP(0,$const)); 997d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($Hkey,&QWP(0,$Htbl)); 998d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufb ($Xi,$Xn); 999d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1000d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &clmul64x64_T3 ($Xhi,$Xi,$Hkey); 1001d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &reduction_alg5 ($Xhi,$Xi); 1002d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1003d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufb ($Xi,$Xn); 1004d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu (&QWP(0,$Xip),$Xi); 1005d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1006d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &ret (); 1007d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_end_B("gcm_gmult_clmul"); 1008d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1009d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_begin("gcm_ghash_clmul"); 1010d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Xip,&wparam(0)); 1011d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($Htbl,&wparam(1)); 1012d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($inp,&wparam(2)); 1013d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &mov ($len,&wparam(3)); 1014d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1015d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &call (&label("pic")); 1016d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&set_label("pic"); 1017d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &blindpop ($const); 1018d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &lea ($const,&DWP(&label("bswap")."-".&label("pic"),$const)); 1019d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1020d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($Xi,&QWP(0,$Xip)); 1021d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T3,&QWP(0,$const)); 1022d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($Hkey,&QWP(0,$Htbl)); 1023d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufb ($Xi,$T3); 1024d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1025d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &sub ($len,0x10); 1026d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &jz (&label("odd_tail")); 1027d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1028d9e397b599b13d642138480a28c14db7a136bf0Adam Langley ####### 1029d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # Xi+2 =[H*(Ii+1 + Xi+1)] mod P = 1030d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # [(H*Ii+1) + (H*Xi+1)] mod P = 1031d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # [(H*Ii+1) + H^2*(Ii+Xi)] mod P 1032d9e397b599b13d642138480a28c14db7a136bf0Adam Langley # 1033d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($T1,&QWP(0,$inp)); # Ii 1034d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($Xn,&QWP(16,$inp)); # Ii+1 1035d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufb ($T1,$T3); 1036d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufb ($Xn,$T3); 1037d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$T1); # Ii+Xi 1038d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1039d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &clmul64x64_T3 ($Xhn,$Xn,$Hkey); # H*Ii+1 1040d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($Hkey,&QWP(16,$Htbl)); # load H^2 1041d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1042d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &sub ($len,0x20); 1043d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &lea ($inp,&DWP(32,$inp)); # i+=2 1044d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &jbe (&label("even_tail")); 1045d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1046d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&set_label("mod_loop"); 1047d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &clmul64x64_T3 ($Xhi,$Xi,$Hkey); # H^2*(Ii+Xi) 1048d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($Hkey,&QWP(0,$Htbl)); # load H 1049d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1050d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$Xn); # (H*Ii+1) + H^2*(Ii+Xi) 1051d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xhi,$Xhn); 1052d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1053d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &reduction_alg5 ($Xhi,$Xi); 1054d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1055d9e397b599b13d642138480a28c14db7a136bf0Adam Langley ####### 1056d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T3,&QWP(0,$const)); 1057d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($T1,&QWP(0,$inp)); # Ii 1058d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($Xn,&QWP(16,$inp)); # Ii+1 1059d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufb ($T1,$T3); 1060d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufb ($Xn,$T3); 1061d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$T1); # Ii+Xi 1062d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1063d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &clmul64x64_T3 ($Xhn,$Xn,$Hkey); # H*Ii+1 1064d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($Hkey,&QWP(16,$Htbl)); # load H^2 1065d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1066d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &sub ($len,0x20); 1067d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &lea ($inp,&DWP(32,$inp)); 1068d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &ja (&label("mod_loop")); 1069d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1070d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&set_label("even_tail"); 1071d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &clmul64x64_T3 ($Xhi,$Xi,$Hkey); # H^2*(Ii+Xi) 1072d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1073d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$Xn); # (H*Ii+1) + H^2*(Ii+Xi) 1074d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xhi,$Xhn); 1075d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1076d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &reduction_alg5 ($Xhi,$Xi); 1077d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1078d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T3,&QWP(0,$const)); 1079d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &test ($len,$len); 1080d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &jnz (&label("done")); 1081d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1082d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($Hkey,&QWP(0,$Htbl)); # load H 1083d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&set_label("odd_tail"); 1084d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu ($T1,&QWP(0,$inp)); # Ii 1085d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufb ($T1,$T3); 1086d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pxor ($Xi,$T1); # Ii+Xi 1087d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1088d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &clmul64x64_T3 ($Xhi,$Xi,$Hkey); # H*(Ii+Xi) 1089d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &reduction_alg5 ($Xhi,$Xi); 1090d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1091d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqa ($T3,&QWP(0,$const)); 1092d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&set_label("done"); 1093d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &pshufb ($Xi,$T3); 1094d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &movdqu (&QWP(0,$Xip),$Xi); 1095d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&function_end("gcm_ghash_clmul"); 1096d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1097d9e397b599b13d642138480a28c14db7a136bf0Adam Langley} 1098d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1099d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&set_label("bswap",64); 1100d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_byte(15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0); 1101d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_byte(1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0xc2); # 0x1c2_polynomial 1102d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&set_label("rem_8bit",64); 1103d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x0000,0x01C2,0x0384,0x0246,0x0708,0x06CA,0x048C,0x054E); 1104d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x0E10,0x0FD2,0x0D94,0x0C56,0x0918,0x08DA,0x0A9C,0x0B5E); 1105d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x1C20,0x1DE2,0x1FA4,0x1E66,0x1B28,0x1AEA,0x18AC,0x196E); 1106d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x1230,0x13F2,0x11B4,0x1076,0x1538,0x14FA,0x16BC,0x177E); 1107d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x3840,0x3982,0x3BC4,0x3A06,0x3F48,0x3E8A,0x3CCC,0x3D0E); 1108d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x3650,0x3792,0x35D4,0x3416,0x3158,0x309A,0x32DC,0x331E); 1109d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x2460,0x25A2,0x27E4,0x2626,0x2368,0x22AA,0x20EC,0x212E); 1110d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x2A70,0x2BB2,0x29F4,0x2836,0x2D78,0x2CBA,0x2EFC,0x2F3E); 1111d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x7080,0x7142,0x7304,0x72C6,0x7788,0x764A,0x740C,0x75CE); 1112d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x7E90,0x7F52,0x7D14,0x7CD6,0x7998,0x785A,0x7A1C,0x7BDE); 1113d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x6CA0,0x6D62,0x6F24,0x6EE6,0x6BA8,0x6A6A,0x682C,0x69EE); 1114d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x62B0,0x6372,0x6134,0x60F6,0x65B8,0x647A,0x663C,0x67FE); 1115d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x48C0,0x4902,0x4B44,0x4A86,0x4FC8,0x4E0A,0x4C4C,0x4D8E); 1116d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x46D0,0x4712,0x4554,0x4496,0x41D8,0x401A,0x425C,0x439E); 1117d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x54E0,0x5522,0x5764,0x56A6,0x53E8,0x522A,0x506C,0x51AE); 1118d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x5AF0,0x5B32,0x5974,0x58B6,0x5DF8,0x5C3A,0x5E7C,0x5FBE); 1119d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0xE100,0xE0C2,0xE284,0xE346,0xE608,0xE7CA,0xE58C,0xE44E); 1120d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0xEF10,0xEED2,0xEC94,0xED56,0xE818,0xE9DA,0xEB9C,0xEA5E); 1121d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0xFD20,0xFCE2,0xFEA4,0xFF66,0xFA28,0xFBEA,0xF9AC,0xF86E); 1122d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0xF330,0xF2F2,0xF0B4,0xF176,0xF438,0xF5FA,0xF7BC,0xF67E); 1123d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0xD940,0xD882,0xDAC4,0xDB06,0xDE48,0xDF8A,0xDDCC,0xDC0E); 1124d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0xD750,0xD692,0xD4D4,0xD516,0xD058,0xD19A,0xD3DC,0xD21E); 1125d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0xC560,0xC4A2,0xC6E4,0xC726,0xC268,0xC3AA,0xC1EC,0xC02E); 1126d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0xCB70,0xCAB2,0xC8F4,0xC936,0xCC78,0xCDBA,0xCFFC,0xCE3E); 1127d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x9180,0x9042,0x9204,0x93C6,0x9688,0x974A,0x950C,0x94CE); 1128d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x9F90,0x9E52,0x9C14,0x9DD6,0x9898,0x995A,0x9B1C,0x9ADE); 1129d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x8DA0,0x8C62,0x8E24,0x8FE6,0x8AA8,0x8B6A,0x892C,0x88EE); 1130d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0x83B0,0x8272,0x8034,0x81F6,0x84B8,0x857A,0x873C,0x86FE); 1131d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0xA9C0,0xA802,0xAA44,0xAB86,0xAEC8,0xAF0A,0xAD4C,0xAC8E); 1132d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0xA7D0,0xA612,0xA454,0xA596,0xA0D8,0xA11A,0xA35C,0xA29E); 1133d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0xB5E0,0xB422,0xB664,0xB7A6,0xB2E8,0xB32A,0xB16C,0xB0AE); 1134d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_short(0xBBF0,0xBA32,0xB874,0xB9B6,0xBCF8,0xBD3A,0xBF7C,0xBEBE); 1135d9e397b599b13d642138480a28c14db7a136bf0Adam Langley}} # $sse2 1136d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1137d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&set_label("rem_4bit",64); 1138d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_word(0,0x0000<<$S,0,0x1C20<<$S,0,0x3840<<$S,0,0x2460<<$S); 1139d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_word(0,0x7080<<$S,0,0x6CA0<<$S,0,0x48C0<<$S,0,0x54E0<<$S); 1140d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_word(0,0xE100<<$S,0,0xFD20<<$S,0,0xD940<<$S,0,0xC560<<$S); 1141d9e397b599b13d642138480a28c14db7a136bf0Adam Langley &data_word(0,0x9180<<$S,0,0x8DA0<<$S,0,0xA9C0<<$S,0,0xB5E0<<$S); 1142d9e397b599b13d642138480a28c14db7a136bf0Adam Langley}}} # !$x86only 1143d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1144d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&asciz("GHASH for x86, CRYPTOGAMS by <appro\@openssl.org>"); 1145d9e397b599b13d642138480a28c14db7a136bf0Adam Langley&asm_finish(); 1146d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1147c895d6b1c580258e72e1ed3fcc86d38970ded9e1David Benjaminclose STDOUT; 1148c895d6b1c580258e72e1ed3fcc86d38970ded9e1David Benjamin 1149d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# A question was risen about choice of vanilla MMX. Or rather why wasn't 1150d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# SSE2 chosen instead? In addition to the fact that MMX runs on legacy 1151d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# CPUs such as PIII, "4-bit" MMX version was observed to provide better 1152d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# performance than *corresponding* SSE2 one even on contemporary CPUs. 1153d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# SSE2 results were provided by Peter-Michael Hager. He maintains SSE2 1154d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# implementation featuring full range of lookup-table sizes, but with 1155d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# per-invocation lookup table setup. Latter means that table size is 1156d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# chosen depending on how much data is to be hashed in every given call, 1157d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# more data - larger table. Best reported result for Core2 is ~4 cycles 1158d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# per processed byte out of 64KB block. This number accounts even for 1159d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# 64KB table setup overhead. As discussed in gcm128.c we choose to be 1160d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# more conservative in respect to lookup table sizes, but how do the 1161d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# results compare? Minimalistic "256B" MMX version delivers ~11 cycles 1162d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# on same platform. As also discussed in gcm128.c, next in line "8-bit 1163d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# Shoup's" or "4KB" method should deliver twice the performance of 1164d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# "256B" one, in other words not worse than ~6 cycles per byte. It 1165d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# should be also be noted that in SSE2 case improvement can be "super- 1166d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# linear," i.e. more than twice, mostly because >>8 maps to single 1167d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# instruction on SSE2 register. This is unlike "4-bit" case when >>4 1168d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# maps to same amount of instructions in both MMX and SSE2 cases. 1169d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# Bottom line is that switch to SSE2 is considered to be justifiable 1170d9e397b599b13d642138480a28c14db7a136bf0Adam Langley# only in case we choose to implement "8-bit" method... 1171