SkBlitRow_opts_arm_neon.cpp revision fbfcd5602128ec010c82cb733c9cdc0a3254f9f3
1a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com/* 2a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com * Copyright 2012 The Android Open Source Project 3a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com * 4a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com * Use of this source code is governed by a BSD-style license that can be 5a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com * found in the LICENSE file. 6a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com */ 7a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 8a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#include "SkBlitRow_opts_arm.h" 9a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 10a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#include "SkBlitMask.h" 11a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#include "SkBlitRow.h" 12a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#include "SkColorPriv.h" 13a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#include "SkDither.h" 14a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#include "SkMathPriv.h" 15a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#include "SkUtils.h" 16a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 17a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#include "SkCachePreload_arm.h" 18a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 19a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#include <arm_neon.h> 20a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 21a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.comvoid S32A_D565_Opaque_neon(uint16_t* SK_RESTRICT dst, 22a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com const SkPMColor* SK_RESTRICT src, int count, 23a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com U8CPU alpha, int /*x*/, int /*y*/) { 24a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com SkASSERT(255 == alpha); 25a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 26a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com if (count >= 8) { 27a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com uint16_t* SK_RESTRICT keep_dst; 28fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 29a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com asm volatile ( 30a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "ands ip, %[count], #7 \n\t" 31a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmov.u8 d31, #1<<7 \n\t" 32a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vld1.16 {q12}, [%[dst]] \n\t" 33a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vld4.8 {d0-d3}, [%[src]] \n\t" 34a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // Thumb does not support the standard ARM conditional 35a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // instructions but instead requires the 'it' instruction 36a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // to signal conditional execution 37a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "it eq \n\t" 38a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "moveq ip, #8 \n\t" 39a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "mov %[keep_dst], %[dst] \n\t" 40fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 41a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "add %[src], %[src], ip, LSL#2 \n\t" 42a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "add %[dst], %[dst], ip, LSL#1 \n\t" 43a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "subs %[count], %[count], ip \n\t" 44a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "b 9f \n\t" 45a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // LOOP 46a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "2: \n\t" 47fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 48a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vld1.16 {q12}, [%[dst]]! \n\t" 49a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vld4.8 {d0-d3}, [%[src]]! \n\t" 50a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vst1.16 {q10}, [%[keep_dst]] \n\t" 51a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "sub %[keep_dst], %[dst], #8*2 \n\t" 52a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "subs %[count], %[count], #8 \n\t" 53a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "9: \n\t" 54a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "pld [%[dst],#32] \n\t" 55a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // expand 0565 q12 to 8888 {d4-d7} 56a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmovn.u16 d4, q12 \n\t" 57a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshr.u16 q11, q12, #5 \n\t" 58a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshr.u16 q10, q12, #6+5 \n\t" 59a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmovn.u16 d5, q11 \n\t" 60a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmovn.u16 d6, q10 \n\t" 61a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshl.u8 d4, d4, #3 \n\t" 62a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshl.u8 d5, d5, #2 \n\t" 63a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshl.u8 d6, d6, #3 \n\t" 64fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 65a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmovl.u8 q14, d31 \n\t" 66a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmovl.u8 q13, d31 \n\t" 67a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmovl.u8 q12, d31 \n\t" 68fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 69a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // duplicate in 4/2/1 & 8pix vsns 70a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmvn.8 d30, d3 \n\t" 71a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmlal.u8 q14, d30, d6 \n\t" 72a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmlal.u8 q13, d30, d5 \n\t" 73a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmlal.u8 q12, d30, d4 \n\t" 74a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshr.u16 q8, q14, #5 \n\t" 75a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshr.u16 q9, q13, #6 \n\t" 76a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vaddhn.u16 d6, q14, q8 \n\t" 77a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshr.u16 q8, q12, #5 \n\t" 78a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vaddhn.u16 d5, q13, q9 \n\t" 79a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vqadd.u8 d6, d6, d0 \n\t" // moved up 80a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vaddhn.u16 d4, q12, q8 \n\t" 81a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // intentionally don't calculate alpha 82a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // result in d4-d6 83fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 84a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vqadd.u8 d5, d5, d1 \n\t" 85a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vqadd.u8 d4, d4, d2 \n\t" 86fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 87a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // pack 8888 {d4-d6} to 0565 q10 88a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshll.u8 q10, d6, #8 \n\t" 89a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshll.u8 q3, d5, #8 \n\t" 90a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshll.u8 q2, d4, #8 \n\t" 91a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vsri.u16 q10, q3, #5 \n\t" 92a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vsri.u16 q10, q2, #11 \n\t" 93fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 94a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "bne 2b \n\t" 95fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 96a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "1: \n\t" 97a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vst1.16 {q10}, [%[keep_dst]] \n\t" 98a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com : [count] "+r" (count) 99fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com : [dst] "r" (dst), [keep_dst] "r" (keep_dst), [src] "r" (src) 100a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com : "ip", "cc", "memory", "d0","d1","d2","d3","d4","d5","d6","d7", 101a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "d16","d17","d18","d19","d20","d21","d22","d23","d24","d25","d26","d27","d28","d29", 102a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "d30","d31" 103a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com ); 104a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com } 105fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com else 106a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com { // handle count < 8 107a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com uint16_t* SK_RESTRICT keep_dst; 108fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 109a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com asm volatile ( 110a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmov.u8 d31, #1<<7 \n\t" 111a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "mov %[keep_dst], %[dst] \n\t" 112fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 113a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "tst %[count], #4 \n\t" 114a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "beq 14f \n\t" 115a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vld1.16 {d25}, [%[dst]]! \n\t" 116a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vld1.32 {q1}, [%[src]]! \n\t" 117fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 118a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "14: \n\t" 119a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "tst %[count], #2 \n\t" 120a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "beq 12f \n\t" 121a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vld1.32 {d24[1]}, [%[dst]]! \n\t" 122a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vld1.32 {d1}, [%[src]]! \n\t" 123fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 124a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "12: \n\t" 125a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "tst %[count], #1 \n\t" 126a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "beq 11f \n\t" 127a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vld1.16 {d24[1]}, [%[dst]]! \n\t" 128a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vld1.32 {d0[1]}, [%[src]]! \n\t" 129fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 130a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "11: \n\t" 131a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // unzips achieve the same as a vld4 operation 132a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vuzpq.u16 q0, q1 \n\t" 133a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vuzp.u8 d0, d1 \n\t" 134a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vuzp.u8 d2, d3 \n\t" 135a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // expand 0565 q12 to 8888 {d4-d7} 136a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmovn.u16 d4, q12 \n\t" 137a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshr.u16 q11, q12, #5 \n\t" 138a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshr.u16 q10, q12, #6+5 \n\t" 139a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmovn.u16 d5, q11 \n\t" 140a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmovn.u16 d6, q10 \n\t" 141a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshl.u8 d4, d4, #3 \n\t" 142a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshl.u8 d5, d5, #2 \n\t" 143a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshl.u8 d6, d6, #3 \n\t" 144fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 145a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmovl.u8 q14, d31 \n\t" 146a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmovl.u8 q13, d31 \n\t" 147a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmovl.u8 q12, d31 \n\t" 148fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 149a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // duplicate in 4/2/1 & 8pix vsns 150a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmvn.8 d30, d3 \n\t" 151a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmlal.u8 q14, d30, d6 \n\t" 152a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmlal.u8 q13, d30, d5 \n\t" 153a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmlal.u8 q12, d30, d4 \n\t" 154a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshr.u16 q8, q14, #5 \n\t" 155a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshr.u16 q9, q13, #6 \n\t" 156a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vaddhn.u16 d6, q14, q8 \n\t" 157a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshr.u16 q8, q12, #5 \n\t" 158a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vaddhn.u16 d5, q13, q9 \n\t" 159a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vqadd.u8 d6, d6, d0 \n\t" // moved up 160a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vaddhn.u16 d4, q12, q8 \n\t" 161a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // intentionally don't calculate alpha 162a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // result in d4-d6 163fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 164a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vqadd.u8 d5, d5, d1 \n\t" 165a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vqadd.u8 d4, d4, d2 \n\t" 166fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 167a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // pack 8888 {d4-d6} to 0565 q10 168a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshll.u8 q10, d6, #8 \n\t" 169a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshll.u8 q3, d5, #8 \n\t" 170a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshll.u8 q2, d4, #8 \n\t" 171a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vsri.u16 q10, q3, #5 \n\t" 172a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vsri.u16 q10, q2, #11 \n\t" 173fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 174a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // store 175a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "tst %[count], #4 \n\t" 176a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "beq 24f \n\t" 177a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vst1.16 {d21}, [%[keep_dst]]! \n\t" 178fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 179a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "24: \n\t" 180a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "tst %[count], #2 \n\t" 181a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "beq 22f \n\t" 182a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vst1.32 {d20[1]}, [%[keep_dst]]! \n\t" 183fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 184a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "22: \n\t" 185a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "tst %[count], #1 \n\t" 186a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "beq 21f \n\t" 187a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vst1.16 {d20[1]}, [%[keep_dst]]! \n\t" 188fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 189a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "21: \n\t" 190a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com : [count] "+r" (count) 191a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com : [dst] "r" (dst), [keep_dst] "r" (keep_dst), [src] "r" (src) 192a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com : "ip", "cc", "memory", "d0","d1","d2","d3","d4","d5","d6","d7", 193a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "d16","d17","d18","d19","d20","d21","d22","d23","d24","d25","d26","d27","d28","d29", 194a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "d30","d31" 195a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com ); 196a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com } 197a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com} 198a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 199a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.comvoid S32A_D565_Blend_neon(uint16_t* SK_RESTRICT dst, 200a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com const SkPMColor* SK_RESTRICT src, int count, 201a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com U8CPU alpha, int /*x*/, int /*y*/) { 202a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 203a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com U8CPU alpha_for_asm = alpha; 204a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 205a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com asm volatile ( 206a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com /* This code implements a Neon version of S32A_D565_Blend. The output differs from 207a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com * the original in two respects: 208a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com * 1. The results have a few mismatches compared to the original code. These mismatches 209a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com * never exceed 1. It's possible to improve accuracy vs. a floating point 210a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com * implementation by introducing rounding right shifts (vrshr) for the final stage. 211a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com * Rounding is not present in the code below, because although results would be closer 212fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com * to a floating point implementation, the number of mismatches compared to the 213a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com * original code would be far greater. 214a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com * 2. On certain inputs, the original code can overflow, causing colour channels to 215a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com * mix. Although the Neon code can also overflow, it doesn't allow one colour channel 216a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com * to affect another. 217a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com */ 218fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 219a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#if 1 220fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* reflects SkAlpha255To256()'s change from a+a>>7 to a+1 */ 221a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "add %[alpha], %[alpha], #1 \n\t" // adjust range of alpha 0-256 222a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#else 223a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "add %[alpha], %[alpha], %[alpha], lsr #7 \n\t" // adjust range of alpha 0-256 224a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#endif 225a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmov.u16 q3, #255 \n\t" // set up constant 226a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "movs r4, %[count], lsr #3 \n\t" // calc. count>>3 227a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmov.u16 d2[0], %[alpha] \n\t" // move alpha to Neon 228a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "beq 2f \n\t" // if count8 == 0, exit 229a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmov.u16 q15, #0x1f \n\t" // set up blue mask 230fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 231a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "1: \n\t" 232a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vld1.u16 {d0, d1}, [%[dst]] \n\t" // load eight dst RGB565 pixels 233a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "subs r4, r4, #1 \n\t" // decrement loop counter 234a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vld4.u8 {d24, d25, d26, d27}, [%[src]]! \n\t" // load eight src ABGR32 pixels 235a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // and deinterleave 236fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 237a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshl.u16 q9, q0, #5 \n\t" // shift green to top of lanes 238a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vand q10, q0, q15 \n\t" // extract blue 239a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshr.u16 q8, q0, #11 \n\t" // extract red 240a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshr.u16 q9, q9, #10 \n\t" // extract green 241a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // dstrgb = {q8, q9, q10} 242fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 243a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshr.u8 d24, d24, #3 \n\t" // shift red to 565 range 244a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshr.u8 d25, d25, #2 \n\t" // shift green to 565 range 245a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshr.u8 d26, d26, #3 \n\t" // shift blue to 565 range 246fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 247a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmovl.u8 q11, d24 \n\t" // widen red to 16 bits 248a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmovl.u8 q12, d25 \n\t" // widen green to 16 bits 249a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmovl.u8 q14, d27 \n\t" // widen alpha to 16 bits 250a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmovl.u8 q13, d26 \n\t" // widen blue to 16 bits 251a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // srcrgba = {q11, q12, q13, q14} 252fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 253a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmul.u16 q2, q14, d2[0] \n\t" // sa * src_scale 254a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmul.u16 q11, q11, d2[0] \n\t" // red result = src_red * src_scale 255a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmul.u16 q12, q12, d2[0] \n\t" // grn result = src_grn * src_scale 256a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmul.u16 q13, q13, d2[0] \n\t" // blu result = src_blu * src_scale 257fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 258a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshr.u16 q2, q2, #8 \n\t" // sa * src_scale >> 8 259a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vsub.u16 q2, q3, q2 \n\t" // 255 - (sa * src_scale >> 8) 260a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // dst_scale = q2 261fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 262a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmla.u16 q11, q8, q2 \n\t" // red result += dst_red * dst_scale 263a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmla.u16 q12, q9, q2 \n\t" // grn result += dst_grn * dst_scale 264a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmla.u16 q13, q10, q2 \n\t" // blu result += dst_blu * dst_scale 265a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 266a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#if 1 267fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com // trying for a better match with SkDiv255Round(a) 268fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com // C alg is: a+=128; (a+a>>8)>>8 269fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com // we'll use just a rounding shift [q2 is available for scratch] 270a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vrshr.u16 q11, q11, #8 \n\t" // shift down red 271a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vrshr.u16 q12, q12, #8 \n\t" // shift down green 272a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vrshr.u16 q13, q13, #8 \n\t" // shift down blue 273a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#else 274fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com // arm's original "truncating divide by 256" 275a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshr.u16 q11, q11, #8 \n\t" // shift down red 276a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshr.u16 q12, q12, #8 \n\t" // shift down green 277a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshr.u16 q13, q13, #8 \n\t" // shift down blue 278a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#endif 279fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 280a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vsli.u16 q13, q12, #5 \n\t" // insert green into blue 281a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vsli.u16 q13, q11, #11 \n\t" // insert red into green/blue 282a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vst1.16 {d26, d27}, [%[dst]]! \n\t" // write pixel back to dst, update ptr 283fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 284a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "bne 1b \n\t" // if counter != 0, loop 285a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "2: \n\t" // exit 286fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 287a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com : [src] "+r" (src), [dst] "+r" (dst), [count] "+r" (count), [alpha] "+r" (alpha_for_asm) 288a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com : 289a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com : "cc", "memory", "r4", "d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7", "d16", "d17", "d18", "d19", "d20", "d21", "d22", "d23", "d24", "d25", "d26", "d27", "d28", "d29", "d30", "d31" 290a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com ); 291a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 292a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com count &= 7; 293a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com if (count > 0) { 294a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com do { 295a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com SkPMColor sc = *src++; 296a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com if (sc) { 297a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com uint16_t dc = *dst; 298a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com unsigned dst_scale = 255 - SkMulDiv255Round(SkGetPackedA32(sc), alpha); 299a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com unsigned dr = SkMulS16(SkPacked32ToR16(sc), alpha) + SkMulS16(SkGetPackedR16(dc), dst_scale); 300a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com unsigned dg = SkMulS16(SkPacked32ToG16(sc), alpha) + SkMulS16(SkGetPackedG16(dc), dst_scale); 301a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com unsigned db = SkMulS16(SkPacked32ToB16(sc), alpha) + SkMulS16(SkGetPackedB16(dc), dst_scale); 302a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com *dst = SkPackRGB16(SkDiv255Round(dr), SkDiv255Round(dg), SkDiv255Round(db)); 303a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com } 304a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com dst += 1; 305a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com } while (--count != 0); 306a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com } 307a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com} 308a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 309a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com/* dither matrix for Neon, derived from gDitherMatrix_3Bit_16. 310a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com * each dither value is spaced out into byte lanes, and repeated 311a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com * to allow an 8-byte load from offsets 0, 1, 2 or 3 from the 312a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com * start of each row. 313a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com */ 314a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.comstatic const uint8_t gDitherMatrix_Neon[48] = { 315a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 0, 4, 1, 5, 0, 4, 1, 5, 0, 4, 1, 5, 316a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 6, 2, 7, 3, 6, 2, 7, 3, 6, 2, 7, 3, 317a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 1, 5, 0, 4, 1, 5, 0, 4, 1, 5, 0, 4, 318a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 7, 3, 6, 2, 7, 3, 6, 2, 7, 3, 6, 2, 319fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 320a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com}; 321a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 322a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.comvoid S32_D565_Blend_Dither_neon(uint16_t *dst, const SkPMColor *src, 323a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com int count, U8CPU alpha, int x, int y) 324a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com{ 325a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com /* select row and offset for dither array */ 326a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com const uint8_t *dstart = &gDitherMatrix_Neon[(y&3)*12 + (x&3)]; 327fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 328a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com /* rescale alpha to range 0 - 256 */ 329a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com int scale = SkAlpha255To256(alpha); 330fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 331a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com asm volatile ( 332a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vld1.8 {d31}, [%[dstart]] \n\t" // load dither values 333a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshr.u8 d30, d31, #1 \n\t" // calc. green dither values 334a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vdup.16 d6, %[scale] \n\t" // duplicate scale into neon reg 335a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmov.i8 d29, #0x3f \n\t" // set up green mask 336a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmov.i8 d28, #0x1f \n\t" // set up blue mask 337a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "1: \n\t" 338a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vld4.8 {d0, d1, d2, d3}, [%[src]]! \n\t" // load 8 pixels and split into argb 339a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshr.u8 d22, d0, #5 \n\t" // calc. red >> 5 340a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshr.u8 d23, d1, #6 \n\t" // calc. green >> 6 341a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshr.u8 d24, d2, #5 \n\t" // calc. blue >> 5 342a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vaddl.u8 q8, d0, d31 \n\t" // add in dither to red and widen 343a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vaddl.u8 q9, d1, d30 \n\t" // add in dither to green and widen 344a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vaddl.u8 q10, d2, d31 \n\t" // add in dither to blue and widen 345a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vsubw.u8 q8, q8, d22 \n\t" // sub shifted red from result 346a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vsubw.u8 q9, q9, d23 \n\t" // sub shifted green from result 347a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vsubw.u8 q10, q10, d24 \n\t" // sub shifted blue from result 348a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshrn.i16 d22, q8, #3 \n\t" // shift right and narrow to 5 bits 349a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshrn.i16 d23, q9, #2 \n\t" // shift right and narrow to 6 bits 350a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshrn.i16 d24, q10, #3 \n\t" // shift right and narrow to 5 bits 351a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // load 8 pixels from dst, extract rgb 352a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vld1.16 {d0, d1}, [%[dst]] \n\t" // load 8 pixels 353a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshrn.i16 d17, q0, #5 \n\t" // shift green down to bottom 6 bits 354a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmovn.i16 d18, q0 \n\t" // narrow to get blue as bytes 355a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshr.u16 q0, q0, #11 \n\t" // shift down to extract red 356a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vand d17, d17, d29 \n\t" // and green with green mask 357a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vand d18, d18, d28 \n\t" // and blue with blue mask 358a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmovn.i16 d16, q0 \n\t" // narrow to get red as bytes 359a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // src = {d22 (r), d23 (g), d24 (b)} 360a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // dst = {d16 (r), d17 (g), d18 (b)} 361a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // subtract dst from src and widen 362a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vsubl.s8 q0, d22, d16 \n\t" // subtract red src from dst 363a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vsubl.s8 q1, d23, d17 \n\t" // subtract green src from dst 364a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vsubl.s8 q2, d24, d18 \n\t" // subtract blue src from dst 365a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // multiply diffs by scale and shift 366a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmul.i16 q0, q0, d6[0] \n\t" // multiply red by scale 367a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmul.i16 q1, q1, d6[0] \n\t" // multiply blue by scale 368a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmul.i16 q2, q2, d6[0] \n\t" // multiply green by scale 369a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "subs %[count], %[count], #8 \n\t" // decrement loop counter 370a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshrn.i16 d0, q0, #8 \n\t" // shift down red by 8 and narrow 371a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshrn.i16 d2, q1, #8 \n\t" // shift down green by 8 and narrow 372a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshrn.i16 d4, q2, #8 \n\t" // shift down blue by 8 and narrow 373a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // add dst to result 374a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vaddl.s8 q0, d0, d16 \n\t" // add dst to red 375a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vaddl.s8 q1, d2, d17 \n\t" // add dst to green 376a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vaddl.s8 q2, d4, d18 \n\t" // add dst to blue 377a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // put result into 565 format 378a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vsli.i16 q2, q1, #5 \n\t" // shift up green and insert into blue 379a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vsli.i16 q2, q0, #11 \n\t" // shift up red and insert into blue 380a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vst1.16 {d4, d5}, [%[dst]]! \n\t" // store result 381a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "bgt 1b \n\t" // loop if count > 0 382a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com : [src] "+r" (src), [dst] "+r" (dst), [count] "+r" (count) 383a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com : [dstart] "r" (dstart), [scale] "r" (scale) 384a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com : "cc", "memory", "d0", "d1", "d2", "d3", "d4", "d5", "d6", "d16", "d17", "d18", "d19", "d20", "d21", "d22", "d23", "d24", "d28", "d29", "d30", "d31" 385a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com ); 386fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 387a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com DITHER_565_SCAN(y); 388fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 389a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com while((count & 7) > 0) 390a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com { 391a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com SkPMColor c = *src++; 392fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 393a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com int dither = DITHER_VALUE(x); 394a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com int sr = SkGetPackedR32(c); 395a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com int sg = SkGetPackedG32(c); 396a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com int sb = SkGetPackedB32(c); 397a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com sr = SkDITHER_R32To565(sr, dither); 398a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com sg = SkDITHER_G32To565(sg, dither); 399a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com sb = SkDITHER_B32To565(sb, dither); 400fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 401a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com uint16_t d = *dst; 402a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com *dst++ = SkPackRGB16(SkAlphaBlend(sr, SkGetPackedR16(d), scale), 403a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com SkAlphaBlend(sg, SkGetPackedG16(d), scale), 404a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com SkAlphaBlend(sb, SkGetPackedB16(d), scale)); 405a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com DITHER_INC_X(x); 406a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com count--; 407a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com } 408a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com} 409a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 410a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.comvoid S32A_Opaque_BlitRow32_neon(SkPMColor* SK_RESTRICT dst, 411a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com const SkPMColor* SK_RESTRICT src, 412a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com int count, U8CPU alpha) { 413a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 414a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com SkASSERT(255 == alpha); 415a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com if (count > 0) { 416a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 417a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 418fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com uint8x8_t alpha_mask; 419a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 420fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com static const uint8_t alpha_mask_setup[] = {3,3,3,3,7,7,7,7}; 421fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com alpha_mask = vld1_u8(alpha_mask_setup); 422a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 423fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* do the NEON unrolled code */ 424fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com#define UNROLL 4 425fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com while (count >= UNROLL) { 426fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com uint8x8_t src_raw, dst_raw, dst_final; 427fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com uint8x8_t src_raw_2, dst_raw_2, dst_final_2; 428a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 429fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* get the source */ 430fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com src_raw = vreinterpret_u8_u32(vld1_u32(src)); 431fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com#if UNROLL > 2 432fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com src_raw_2 = vreinterpret_u8_u32(vld1_u32(src+2)); 433a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#endif 434a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 435fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* get and hold the dst too */ 436fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dst_raw = vreinterpret_u8_u32(vld1_u32(dst)); 437fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com#if UNROLL > 2 438fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dst_raw_2 = vreinterpret_u8_u32(vld1_u32(dst+2)); 439a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#endif 440a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 441fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* 1st and 2nd bits of the unrolling */ 442fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com { 443fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com uint8x8_t dst_cooked; 444fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com uint16x8_t dst_wide; 445fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com uint8x8_t alpha_narrow; 446fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com uint16x8_t alpha_wide; 447a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 448fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* get the alphas spread out properly */ 449fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com alpha_narrow = vtbl1_u8(src_raw, alpha_mask); 450a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#if 1 451fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* reflect SkAlpha255To256() semantics a+1 vs a+a>>7 */ 452fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* we collapsed (255-a)+1 ... */ 453fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com alpha_wide = vsubw_u8(vdupq_n_u16(256), alpha_narrow); 454a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#else 455fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com alpha_wide = vsubw_u8(vdupq_n_u16(255), alpha_narrow); 456fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com alpha_wide = vaddq_u16(alpha_wide, vshrq_n_u16(alpha_wide,7)); 457a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#endif 458a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 459fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* spread the dest */ 460fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dst_wide = vmovl_u8(dst_raw); 461a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 462fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* alpha mul the dest */ 463fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dst_wide = vmulq_u16 (dst_wide, alpha_wide); 464fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dst_cooked = vshrn_n_u16(dst_wide, 8); 465a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 466fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* sum -- ignoring any byte lane overflows */ 467fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dst_final = vadd_u8(src_raw, dst_cooked); 468fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com } 469a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 470fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com#if UNROLL > 2 471fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* the 3rd and 4th bits of our unrolling */ 472fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com { 473fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com uint8x8_t dst_cooked; 474fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com uint16x8_t dst_wide; 475fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com uint8x8_t alpha_narrow; 476fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com uint16x8_t alpha_wide; 477a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 478fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com alpha_narrow = vtbl1_u8(src_raw_2, alpha_mask); 479a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#if 1 480fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* reflect SkAlpha255To256() semantics a+1 vs a+a>>7 */ 481fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* we collapsed (255-a)+1 ... */ 482fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com alpha_wide = vsubw_u8(vdupq_n_u16(256), alpha_narrow); 483a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#else 484fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com alpha_wide = vsubw_u8(vdupq_n_u16(255), alpha_narrow); 485fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com alpha_wide = vaddq_u16(alpha_wide, vshrq_n_u16(alpha_wide,7)); 486a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#endif 487a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 488fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* spread the dest */ 489fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dst_wide = vmovl_u8(dst_raw_2); 490a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 491fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* alpha mul the dest */ 492fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dst_wide = vmulq_u16 (dst_wide, alpha_wide); 493fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dst_cooked = vshrn_n_u16(dst_wide, 8); 494a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 495fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* sum -- ignoring any byte lane overflows */ 496fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dst_final_2 = vadd_u8(src_raw_2, dst_cooked); 497fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com } 498a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#endif 499a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 500fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com vst1_u32(dst, vreinterpret_u32_u8(dst_final)); 501fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com#if UNROLL > 2 502fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com vst1_u32(dst+2, vreinterpret_u32_u8(dst_final_2)); 503a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#endif 504a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 505fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com src += UNROLL; 506fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dst += UNROLL; 507fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com count -= UNROLL; 508fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com } 509fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com#undef UNROLL 510a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 511fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* do any residual iterations */ 512a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com while (--count >= 0) { 513a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com *dst = SkPMSrcOver(*src, *dst); 514a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com src += 1; 515a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com dst += 1; 516a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com } 517a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com } 518a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com} 519a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 520a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 521a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com/* Neon version of S32_Blend_BlitRow32() 522a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com * portable version is in src/core/SkBlitRow_D32.cpp 523a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com */ 524a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.comvoid S32_Blend_BlitRow32_neon(SkPMColor* SK_RESTRICT dst, 525a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com const SkPMColor* SK_RESTRICT src, 526a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com int count, U8CPU alpha) { 527a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com SkASSERT(alpha <= 255); 528a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com if (count > 0) { 529a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com uint16_t src_scale = SkAlpha255To256(alpha); 530a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com uint16_t dst_scale = 256 - src_scale; 531a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 532fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* run them N at a time through the NEON unit */ 533fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* note that each 1 is 4 bytes, each treated exactly the same, 534fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com * so we can work under that guise. We *do* know that the src&dst 535fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com * will be 32-bit aligned quantities, so we can specify that on 536fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com * the load/store ops and do a neon 'reinterpret' to get us to 537fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com * byte-sized (pun intended) pieces that we widen/multiply/shift 538fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com * we're limited at 128 bits in the wide ops, which is 8x16bits 539fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com * or a pair of 32 bit src/dsts. 540fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com */ 541fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* we *could* manually unroll this loop so that we load 128 bits 542fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com * (as a pair of 64s) from each of src and dst, processing them 543fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com * in pieces. This might give us a little better management of 544fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com * the memory latency, but my initial attempts here did not 545fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com * produce an instruction stream that looked all that nice. 546fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com */ 547fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com#define UNROLL 2 548fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com while (count >= UNROLL) { 549fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com uint8x8_t src_raw, dst_raw, dst_final; 550fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com uint16x8_t src_wide, dst_wide; 551fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 552fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* get 64 bits of src, widen it, multiply by src_scale */ 553fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com src_raw = vreinterpret_u8_u32(vld1_u32(src)); 554fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com src_wide = vmovl_u8(src_raw); 555fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* gcc hoists vdupq_n_u16(), better than using vmulq_n_u16() */ 556fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com src_wide = vmulq_u16 (src_wide, vdupq_n_u16(src_scale)); 557fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 558fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* ditto with dst */ 559fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dst_raw = vreinterpret_u8_u32(vld1_u32(dst)); 560fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dst_wide = vmovl_u8(dst_raw); 561fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 562fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* combine add with dst multiply into mul-accumulate */ 563fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dst_wide = vmlaq_u16(src_wide, dst_wide, vdupq_n_u16(dst_scale)); 564fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 565fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dst_final = vshrn_n_u16(dst_wide, 8); 566fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com vst1_u32(dst, vreinterpret_u32_u8(dst_final)); 567fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 568fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com src += UNROLL; 569fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dst += UNROLL; 570fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com count -= UNROLL; 571fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com } 572fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* RBE: well, i don't like how gcc manages src/dst across the above 573fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com * loop it's constantly calculating src+bias, dst+bias and it only 574fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com * adjusts the real ones when we leave the loop. Not sure why 575fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com * it's "hoisting down" (hoisting implies above in my lexicon ;)) 576fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com * the adjustments to src/dst/count, but it does... 577fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com * (might be SSA-style internal logic... 578fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com */ 579fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 580fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com#if UNROLL == 2 581fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com if (count == 1) { 582a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com *dst = SkAlphaMulQ(*src, src_scale) + SkAlphaMulQ(*dst, dst_scale); 583fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com } 584a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#else 585fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com if (count > 0) { 586a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com do { 587a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com *dst = SkAlphaMulQ(*src, src_scale) + SkAlphaMulQ(*dst, dst_scale); 588a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com src += 1; 589a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com dst += 1; 590a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com } while (--count > 0); 591fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com } 592a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#endif 593a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 594fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com#undef UNROLL 595a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com } 596a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com} 597a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 598a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com/////////////////////////////////////////////////////////////////////////////// 599a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 600fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com#undef DEBUG_OPAQUE_DITHER 601a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 602fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com#if defined(DEBUG_OPAQUE_DITHER) 603a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.comstatic void showme8(char *str, void *p, int len) 604a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com{ 605fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com static char buf[256]; 606fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com char tbuf[32]; 607fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com int i; 608fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com char *pc = (char*) p; 609fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com sprintf(buf,"%8s:", str); 610fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com for(i=0;i<len;i++) { 611fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com sprintf(tbuf, " %02x", pc[i]); 612fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com strcat(buf, tbuf); 613fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com } 614fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com SkDebugf("%s\n", buf); 615a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com} 616a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.comstatic void showme16(char *str, void *p, int len) 617a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com{ 618fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com static char buf[256]; 619fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com char tbuf[32]; 620fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com int i; 621fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com uint16_t *pc = (uint16_t*) p; 622fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com sprintf(buf,"%8s:", str); 623fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com len = (len / sizeof(uint16_t)); /* passed as bytes */ 624fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com for(i=0;i<len;i++) { 625fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com sprintf(tbuf, " %04x", pc[i]); 626fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com strcat(buf, tbuf); 627fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com } 628fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com SkDebugf("%s\n", buf); 629a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com} 630a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#endif 631a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 632a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.comvoid S32A_D565_Opaque_Dither_neon (uint16_t * SK_RESTRICT dst, 633a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com const SkPMColor* SK_RESTRICT src, 634a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com int count, U8CPU alpha, int x, int y) { 635a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com SkASSERT(255 == alpha); 636a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 637fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com#define UNROLL 8 638a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 639a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com if (count >= UNROLL) { 640fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com uint8x8_t dbase; 641fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 642fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com#if defined(DEBUG_OPAQUE_DITHER) 643fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com uint16_t tmpbuf[UNROLL]; 644fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com int td[UNROLL]; 645fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com int tdv[UNROLL]; 646fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com int ta[UNROLL]; 647fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com int tap[UNROLL]; 648fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com uint16_t in_dst[UNROLL]; 649fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com int offset = 0; 650fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com int noisy = 0; 651a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#endif 652a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 653fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com const uint8_t *dstart = &gDitherMatrix_Neon[(y&3)*12 + (x&3)]; 654fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dbase = vld1_u8(dstart); 655a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 656a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com do { 657fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com uint8x8_t sr, sg, sb, sa, d; 658fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com uint16x8_t dst8, scale8, alpha8; 659fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com uint16x8_t dst_r, dst_g, dst_b; 660fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 661fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com#if defined(DEBUG_OPAQUE_DITHER) 662fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* calculate 8 elements worth into a temp buffer */ 663fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com { 664fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com int my_y = y; 665fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com int my_x = x; 666fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com SkPMColor* my_src = (SkPMColor*)src; 667fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com uint16_t* my_dst = dst; 668fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com int i; 669a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 670a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com DITHER_565_SCAN(my_y); 671a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com for(i=0;i<UNROLL;i++) { 672a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com SkPMColor c = *my_src++; 673a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com SkPMColorAssert(c); 674a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com if (c) { 675a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com unsigned a = SkGetPackedA32(c); 676fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 677a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com int d = SkAlphaMul(DITHER_VALUE(my_x), SkAlpha255To256(a)); 678fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com tdv[i] = DITHER_VALUE(my_x); 679fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com ta[i] = a; 680fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com tap[i] = SkAlpha255To256(a); 681fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com td[i] = d; 682fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 683a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com unsigned sr = SkGetPackedR32(c); 684a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com unsigned sg = SkGetPackedG32(c); 685a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com unsigned sb = SkGetPackedB32(c); 686a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com sr = SkDITHER_R32_FOR_565(sr, d); 687a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com sg = SkDITHER_G32_FOR_565(sg, d); 688a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com sb = SkDITHER_B32_FOR_565(sb, d); 689fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 690a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com uint32_t src_expanded = (sg << 24) | (sr << 13) | (sb << 2); 691a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com uint32_t dst_expanded = SkExpand_rgb_16(*my_dst); 692a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com dst_expanded = dst_expanded * (SkAlpha255To256(255 - a) >> 3); 693a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // now src and dst expanded are in g:11 r:10 x:1 b:10 694a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com tmpbuf[i] = SkCompact_rgb_16((src_expanded + dst_expanded) >> 5); 695fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com td[i] = d; 696a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 697a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com } else { 698fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com tmpbuf[i] = *my_dst; 699fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com ta[i] = tdv[i] = td[i] = 0xbeef; 700fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com } 701fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com in_dst[i] = *my_dst; 702a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com my_dst += 1; 703a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com DITHER_INC_X(my_x); 704a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com } 705fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com } 706a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#endif 707a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 708fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* source is in ABGR */ 709fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com { 710fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com register uint8x8_t d0 asm("d0"); 711fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com register uint8x8_t d1 asm("d1"); 712fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com register uint8x8_t d2 asm("d2"); 713fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com register uint8x8_t d3 asm("d3"); 714a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 715fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com asm ("vld4.8 {d0-d3},[%4] /* r=%P0 g=%P1 b=%P2 a=%P3 */" 716fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com : "=w" (d0), "=w" (d1), "=w" (d2), "=w" (d3) 717fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com : "r" (src) 718a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com ); 719fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com sr = d0; sg = d1; sb = d2; sa = d3; 720fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com } 721a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 722fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* calculate 'd', which will be 0..7 */ 723fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* dbase[] is 0..7; alpha is 0..256; 16 bits suffice */ 724a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#if defined(SK_BUILD_FOR_ANDROID) 725fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* SkAlpha255To256() semantic a+1 vs a+a>>7 */ 726fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com alpha8 = vaddw_u8(vmovl_u8(sa), vdup_n_u8(1)); 727a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#else 728fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com alpha8 = vaddw_u8(vmovl_u8(sa), vshr_n_u8(sa, 7)); 729a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#endif 730fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com alpha8 = vmulq_u16(alpha8, vmovl_u8(dbase)); 731fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com d = vshrn_n_u16(alpha8, 8); /* narrowing too */ 732fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 733fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* sr = sr - (sr>>5) + d */ 734fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* watching for 8-bit overflow. d is 0..7; risky range of 735fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com * sr is >248; and then (sr>>5) is 7 so it offsets 'd'; 736fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com * safe as long as we do ((sr-sr>>5) + d) */ 737fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com sr = vsub_u8(sr, vshr_n_u8(sr, 5)); 738fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com sr = vadd_u8(sr, d); 739fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 740fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* sb = sb - (sb>>5) + d */ 741fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com sb = vsub_u8(sb, vshr_n_u8(sb, 5)); 742fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com sb = vadd_u8(sb, d); 743fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 744fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* sg = sg - (sg>>6) + d>>1; similar logic for overflows */ 745fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com sg = vsub_u8(sg, vshr_n_u8(sg, 6)); 746fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com sg = vadd_u8(sg, vshr_n_u8(d,1)); 747fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 748fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* need to pick up 8 dst's -- at 16 bits each, 128 bits */ 749fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dst8 = vld1q_u16(dst); 750fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dst_b = vandq_u16(dst8, vdupq_n_u16(0x001F)); 751fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dst_g = vandq_u16(vshrq_n_u16(dst8,5), vdupq_n_u16(0x003F)); 752fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dst_r = vshrq_n_u16(dst8,11); /* clearing hi bits */ 753fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 754fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* blend */ 755a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#if 1 756fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* SkAlpha255To256() semantic a+1 vs a+a>>7 */ 757fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* originally 255-sa + 1 */ 758fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com scale8 = vsubw_u8(vdupq_n_u16(256), sa); 759a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#else 760fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com scale8 = vsubw_u8(vdupq_n_u16(255), sa); 761fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com scale8 = vaddq_u16(scale8, vshrq_n_u16(scale8, 7)); 762a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#endif 763a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 764a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#if 1 765fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* combine the addq and mul, save 3 insns */ 766fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com scale8 = vshrq_n_u16(scale8, 3); 767fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dst_b = vmlaq_u16(vshll_n_u8(sb,2), dst_b, scale8); 768fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dst_g = vmlaq_u16(vshll_n_u8(sg,3), dst_g, scale8); 769fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dst_r = vmlaq_u16(vshll_n_u8(sr,2), dst_r, scale8); 770a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#else 771fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* known correct, but +3 insns over above */ 772fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com scale8 = vshrq_n_u16(scale8, 3); 773fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dst_b = vmulq_u16(dst_b, scale8); 774fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dst_g = vmulq_u16(dst_g, scale8); 775fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dst_r = vmulq_u16(dst_r, scale8); 776fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 777fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* combine */ 778fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* NB: vshll widens, need to preserve those bits */ 779fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dst_b = vaddq_u16(dst_b, vshll_n_u8(sb,2)); 780fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dst_g = vaddq_u16(dst_g, vshll_n_u8(sg,3)); 781fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dst_r = vaddq_u16(dst_r, vshll_n_u8(sr,2)); 782a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#endif 783a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 784fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* repack to store */ 785fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dst8 = vandq_u16(vshrq_n_u16(dst_b, 5), vdupq_n_u16(0x001F)); 786fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dst8 = vsliq_n_u16(dst8, vshrq_n_u16(dst_g, 5), 5); 787fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dst8 = vsliq_n_u16(dst8, vshrq_n_u16(dst_r,5), 11); 788fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 789fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com vst1q_u16(dst, dst8); 790fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 791fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com#if defined(DEBUG_OPAQUE_DITHER) 792fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* verify my 8 elements match the temp buffer */ 793fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com { 794fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com int i, bad=0; 795fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com static int invocation; 796fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 797fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com for (i=0;i<UNROLL;i++) 798fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com if (tmpbuf[i] != dst[i]) bad=1; 799fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com if (bad) { 800fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com SkDebugf("BAD S32A_D565_Opaque_Dither_neon(); invocation %d offset %d\n", 801fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com invocation, offset); 802fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com SkDebugf(" alpha 0x%x\n", alpha); 803fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com for (i=0;i<UNROLL;i++) 804fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com SkDebugf("%2d: %s %04x w %04x id %04x s %08x d %04x %04x %04x %04x\n", 805fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com i, ((tmpbuf[i] != dst[i])?"BAD":"got"), 806fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dst[i], tmpbuf[i], in_dst[i], src[i], td[i], tdv[i], tap[i], ta[i]); 807fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 808fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com showme16("alpha8", &alpha8, sizeof(alpha8)); 809fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com showme16("scale8", &scale8, sizeof(scale8)); 810fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com showme8("d", &d, sizeof(d)); 811fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com showme16("dst8", &dst8, sizeof(dst8)); 812fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com showme16("dst_b", &dst_b, sizeof(dst_b)); 813fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com showme16("dst_g", &dst_g, sizeof(dst_g)); 814fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com showme16("dst_r", &dst_r, sizeof(dst_r)); 815fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com showme8("sb", &sb, sizeof(sb)); 816fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com showme8("sg", &sg, sizeof(sg)); 817fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com showme8("sr", &sr, sizeof(sr)); 818fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 819fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* cop out */ 820fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com return; 821fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com } 822fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com offset += UNROLL; 823fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com invocation++; 824fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com } 825a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#endif 826a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 827a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com dst += UNROLL; 828fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com src += UNROLL; 829fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com count -= UNROLL; 830fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* skip x += UNROLL, since it's unchanged mod-4 */ 831a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com } while (count >= UNROLL); 832a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com } 833fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com#undef UNROLL 834a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 835a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com /* residuals */ 836a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com if (count > 0) { 837a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com DITHER_565_SCAN(y); 838a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com do { 839a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com SkPMColor c = *src++; 840a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com SkPMColorAssert(c); 841a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com if (c) { 842a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com unsigned a = SkGetPackedA32(c); 843fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 844a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // dither and alpha are just temporary variables to work-around 845a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // an ICE in debug. 846a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com unsigned dither = DITHER_VALUE(x); 847a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com unsigned alpha = SkAlpha255To256(a); 848a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com int d = SkAlphaMul(dither, alpha); 849fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 850a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com unsigned sr = SkGetPackedR32(c); 851a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com unsigned sg = SkGetPackedG32(c); 852a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com unsigned sb = SkGetPackedB32(c); 853a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com sr = SkDITHER_R32_FOR_565(sr, d); 854a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com sg = SkDITHER_G32_FOR_565(sg, d); 855a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com sb = SkDITHER_B32_FOR_565(sb, d); 856fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 857a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com uint32_t src_expanded = (sg << 24) | (sr << 13) | (sb << 2); 858a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com uint32_t dst_expanded = SkExpand_rgb_16(*dst); 859a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com dst_expanded = dst_expanded * (SkAlpha255To256(255 - a) >> 3); 860a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // now src and dst expanded are in g:11 r:10 x:1 b:10 861a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com *dst = SkCompact_rgb_16((src_expanded + dst_expanded) >> 5); 862a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com } 863a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com dst += 1; 864a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com DITHER_INC_X(x); 865a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com } while (--count != 0); 866a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com } 867a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com} 868a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 869a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com/////////////////////////////////////////////////////////////////////////////// 870a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 871a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com/* 2009/10/27: RBE says "a work in progress"; debugging says ok; 872a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com * speedup untested, but ARM version is 26 insns/iteration and 873a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com * this NEON version is 21 insns/iteration-of-8 (2.62insns/element) 874a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com * which is 10x the native version; that's pure instruction counts, 875a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com * not accounting for any instruction or memory latencies. 876a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com */ 877a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 878fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com#undef DEBUG_S32_OPAQUE_DITHER 879a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 880a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.comvoid S32_D565_Opaque_Dither_neon(uint16_t* SK_RESTRICT dst, 881a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com const SkPMColor* SK_RESTRICT src, 882a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com int count, U8CPU alpha, int x, int y) { 883a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com SkASSERT(255 == alpha); 884a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 885fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com#define UNROLL 8 886a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com if (count >= UNROLL) { 887fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com uint8x8_t d; 888fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com const uint8_t *dstart = &gDitherMatrix_Neon[(y&3)*12 + (x&3)]; 889fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com d = vld1_u8(dstart); 890fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 891fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com while (count >= UNROLL) { 892fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com uint8x8_t sr, sg, sb, sa; 893fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com uint16x8_t dr, dg, db, da; 894fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com uint16x8_t dst8; 895fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 896fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* source is in ABGR ordering (R == lsb) */ 897fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com { 898fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com register uint8x8_t d0 asm("d0"); 899fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com register uint8x8_t d1 asm("d1"); 900fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com register uint8x8_t d2 asm("d2"); 901fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com register uint8x8_t d3 asm("d3"); 902fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 903fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com asm ("vld4.8 {d0-d3},[%4] /* r=%P0 g=%P1 b=%P2 a=%P3 */" 904fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com : "=w" (d0), "=w" (d1), "=w" (d2), "=w" (d3) 905fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com : "r" (src) 906a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com ); 907fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com sr = d0; sg = d1; sb = d2; sa = d3; 908fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com } 909fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* XXX: if we want to prefetch, hide it in the above asm() 910fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com * using the gcc __builtin_prefetch(), the prefetch will 911fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com * fall to the bottom of the loop -- it won't stick up 912fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com * at the top of the loop, just after the vld4. 913fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com */ 914fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 915fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* sr = sr - (sr>>5) + d */ 916fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com sr = vsub_u8(sr, vshr_n_u8(sr, 5)); 917fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dr = vaddl_u8(sr, d); 918fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 919fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* sb = sb - (sb>>5) + d */ 920fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com sb = vsub_u8(sb, vshr_n_u8(sb, 5)); 921fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com db = vaddl_u8(sb, d); 922fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 923fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* sg = sg - (sg>>6) + d>>1; similar logic for overflows */ 924fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com sg = vsub_u8(sg, vshr_n_u8(sg, 6)); 925fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dg = vaddl_u8(sg, vshr_n_u8(d,1)); 926fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* XXX: check that the "d>>1" here is hoisted */ 927fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 928fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* pack high bits of each into 565 format (rgb, b is lsb) */ 929fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dst8 = vshrq_n_u16(db, 3); 930fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dst8 = vsliq_n_u16(dst8, vshrq_n_u16(dg, 2), 5); 931fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dst8 = vsliq_n_u16(dst8, vshrq_n_u16(dr,3), 11); 932fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 933fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* store it */ 934fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com vst1q_u16(dst, dst8); 935fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 936fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com#if defined(DEBUG_S32_OPAQUE_DITHER) 937fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com /* always good to know if we generated good results */ 938fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com { 939fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com int i, myx = x, myy = y; 940fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com DITHER_565_SCAN(myy); 941fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com for (i=0;i<UNROLL;i++) { 942fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com SkPMColor c = src[i]; 943fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com unsigned dither = DITHER_VALUE(myx); 944fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com uint16_t val = SkDitherRGB32To565(c, dither); 945fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com if (val != dst[i]) { 946fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com SkDebugf("RBE: src %08x dither %02x, want %04x got %04x dbas[i] %02x\n", 947fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com c, dither, val, dst[i], dstart[i]); 948fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com } 949fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com DITHER_INC_X(myx); 950fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com } 951fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com } 952a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com#endif 953a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 954fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com dst += UNROLL; 955fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com src += UNROLL; 956fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com count -= UNROLL; 957fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com x += UNROLL; /* probably superfluous */ 958fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com } 959a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com } 960fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com#undef UNROLL 961a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 962a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com /* residuals */ 963a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com if (count > 0) { 964a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com DITHER_565_SCAN(y); 965a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com do { 966a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com SkPMColor c = *src++; 967a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com SkPMColorAssert(c); 968a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com SkASSERT(SkGetPackedA32(c) == 255); 969a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 970a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com unsigned dither = DITHER_VALUE(x); 971a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com *dst++ = SkDitherRGB32To565(c, dither); 972a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com DITHER_INC_X(x); 973a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com } while (--count != 0); 974a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com } 975a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com} 976a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 977a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.comvoid Color32_arm_neon(SkPMColor* dst, const SkPMColor* src, int count, 978a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com SkPMColor color) { 979a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com if (count <= 0) { 980a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com return; 981a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com } 982a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 983a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com if (0 == color) { 984a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com if (src != dst) { 985a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com memcpy(dst, src, count * sizeof(SkPMColor)); 986a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com } 987a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com return; 988a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com } 989a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 990a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com unsigned colorA = SkGetPackedA32(color); 991a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com if (255 == colorA) { 992a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com sk_memset32(dst, color, count); 993a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com } else { 994a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com unsigned scale = 256 - SkAlpha255To256(colorA); 995a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 996a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com if (count >= 8) { 997a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // at the end of this assembly, count will have been decremented 998a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // to a negative value. That is, if count mod 8 = x, it will be 999a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // -8 +x coming out. 1000a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com asm volatile ( 1001a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com PLD128(src, 0) 1002a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 1003a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vdup.32 q0, %[color] \n\t" 1004a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 1005a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com PLD128(src, 128) 1006a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 1007a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // scale numerical interval [0-255], so load as 8 bits 1008a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vdup.8 d2, %[scale] \n\t" 1009a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 1010a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com PLD128(src, 256) 1011a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 1012a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "subs %[count], %[count], #8 \n\t" 1013a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 1014a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com PLD128(src, 384) 1015a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 1016a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "Loop_Color32: \n\t" 1017a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 1018a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // load src color, 8 pixels, 4 64 bit registers 1019a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // (and increment src). 1020a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vld1.32 {d4-d7}, [%[src]]! \n\t" 1021a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 1022a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com PLD128(src, 384) 1023a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 1024a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // multiply long by scale, 64 bits at a time, 1025a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // destination into a 128 bit register. 1026a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmull.u8 q4, d4, d2 \n\t" 1027a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmull.u8 q5, d5, d2 \n\t" 1028a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmull.u8 q6, d6, d2 \n\t" 1029a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vmull.u8 q7, d7, d2 \n\t" 1030a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 1031a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // shift the 128 bit registers, containing the 16 1032a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // bit scaled values back to 8 bits, narrowing the 1033a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // results to 64 bit registers. 1034a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshrn.i16 d8, q4, #8 \n\t" 1035a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshrn.i16 d9, q5, #8 \n\t" 1036a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshrn.i16 d10, q6, #8 \n\t" 1037a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vshrn.i16 d11, q7, #8 \n\t" 1038a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 1039a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // adding back the color, using 128 bit registers. 1040a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vadd.i8 q6, q4, q0 \n\t" 1041a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vadd.i8 q7, q5, q0 \n\t" 1042a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 1043a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // store back the 8 calculated pixels (2 128 bit 1044a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // registers), and increment dst. 1045a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "vst1.32 {d12-d15}, [%[dst]]! \n\t" 1046a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 1047a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "subs %[count], %[count], #8 \n\t" 1048a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "bge Loop_Color32 \n\t" 1049a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com : [src] "+r" (src), [dst] "+r" (dst), [count] "+r" (count) 1050a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com : [color] "r" (color), [scale] "r" (scale) 1051a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com : "cc", "memory", 1052a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7", 1053a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com "d8", "d9", "d10", "d11", "d12", "d13", "d14", "d15" 1054a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com ); 1055a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // At this point, if we went through the inline assembly, count is 1056a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // a negative value: 1057a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // if the value is -8, there is no pixel left to process. 1058a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // if the value is -7, there is one pixel left to process 1059a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // ... 1060a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // And'ing it with 7 will give us the number of pixels 1061a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // left to process. 1062a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com count = count & 0x7; 1063a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com } 1064a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 1065a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com while (count > 0) { 1066a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com *dst = color + SkAlphaMulQ(*src, scale); 1067a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com src += 1; 1068a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com dst += 1; 1069a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com count--; 1070a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com } 1071a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com } 1072a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com} 1073a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 1074a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com/////////////////////////////////////////////////////////////////////////////// 1075a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 1076a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.comconst SkBlitRow::Proc sk_blitrow_platform_565_procs_arm_neon[] = { 1077a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // no dither 1078a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // NOTE: For the two functions below, we don't have a special version 1079a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // that assumes that each source pixel is opaque. But our S32A is 1080a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // still faster than the default, so use it. 1081a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com S32A_D565_Opaque_neon, // really S32_D565_Opaque 1082a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com S32A_D565_Blend_neon, // really S32_D565_Blend 1083a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com S32A_D565_Opaque_neon, 1084a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com S32A_D565_Blend_neon, 1085a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 1086a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // dither 1087a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com S32_D565_Opaque_Dither_neon, 1088a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com S32_D565_Blend_Dither_neon, 1089a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com S32A_D565_Opaque_Dither_neon, 1090a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com NULL, // S32A_D565_Blend_Dither 1091a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com}; 1092a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 1093a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.comconst SkBlitRow::Proc sk_blitrow_platform_4444_procs_arm_neon[] = { 1094a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // no dither 1095a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com NULL, // S32_D4444_Opaque, 1096a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com NULL, // S32_D4444_Blend, 1097a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com NULL, // S32A_D4444_Opaque, 1098a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com NULL, // S32A_D4444_Blend, 1099a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 1100a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com // dither 1101a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com NULL, // S32_D4444_Opaque_Dither, 1102a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com NULL, // S32_D4444_Blend_Dither, 1103a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com NULL, // S32A_D4444_Opaque_Dither, 1104a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com NULL, // S32A_D4444_Blend_Dither 1105a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com}; 1106a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com 1107a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.comconst SkBlitRow::Proc32 sk_blitrow_platform_32_procs_arm_neon[] = { 1108a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com NULL, // S32_Opaque, 1109fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com S32_Blend_BlitRow32_neon, // S32_Blend, 1110fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com S32A_Opaque_BlitRow32_neon, // S32A_Opaque, 1111fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com S32A_Blend_BlitRow32_arm // S32A_Blend 1112a8dd1ce930811a51cc841f583424d507d95e7e78digit@google.com}; 1113