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| 1 ; Copyright (c) 2011 The Chromium Authors. All rights reserved. |
| 2 ; Use of this source code is governed by a BSD-style license that can be |
| 3 ; found in the LICENSE file. |
| 4 |
| 5 global mangle(SYMBOL) PRIVATE |
| 6 align function_align |
| 7 |
| 8 mangle(SYMBOL): |
| 9 %assign stack_offset 0 |
| 10 |
| 11 extern mangle(kCoefficientsRgbY) |
| 12 |
| 13 ; Parameters are in the following order: |
| 14 ; 1. Y plane |
| 15 ; 2. U plane |
| 16 ; 3. V plane |
| 17 ; 4. ARGB frame |
| 18 ; 5. Width |
| 19 ; 6. Source dx |
| 20 |
| 21 PROLOGUE 6, 7, 3, Y, U, V, ARGB, R1, R2, TEMP |
| 22 |
| 23 %ifdef ARCH_X86_64 |
| 24 %define WORD_SIZE QWORD |
| 25 %else |
| 26 %define WORD_SIZE DWORD |
| 27 %endif |
| 28 |
| 29 %ifdef PIC |
| 30 PUSH R1q ; Width |
| 31 %endif |
| 32 PUSH R2q ; Source dx |
| 33 |
| 34 %define SOURCE_DX WORD_SIZE [rsp] |
| 35 |
| 36 ; PIC code. |
| 37 %ifdef PIC |
| 38 LOAD_SYM R1q, mangle(kCoefficientsRgbY) |
| 39 %define WIDTH WORD_SIZE [rsp + gprsize] |
| 40 %define TABLE R1q |
| 41 %define Xq R2q |
| 42 |
| 43 ; Non-PIC code. |
| 44 %else |
| 45 %define WIDTH R1q |
| 46 %define TABLE mangle(kCoefficientsRgbY) |
| 47 %define Xq R2q |
| 48 %endif |
| 49 |
| 50 ; Set Xq index to 0. |
| 51 xor Xq, Xq |
| 52 jmp .scaleend |
| 53 |
| 54 .scaleloop: |
| 55 ; TABLE can either be a register or a symbol depending on this is |
| 56 ; PIC or not. |
| 57 mov TEMPq, Xq |
| 58 sar TEMPq, 17 |
| 59 movzx TEMPd, BYTE [Uq + TEMPq] |
| 60 movq mm0, [TABLE + 2048 + 8 * TEMPq] |
| 61 mov TEMPq, Xq |
| 62 sar TEMPq, 17 |
| 63 movzx TEMPd, BYTE [Vq + TEMPq] |
| 64 paddsw mm0, [TABLE + 4096 + 8 * TEMPq] |
| 65 mov TEMPq, Xq |
| 66 add Xq, SOURCE_DX |
| 67 sar TEMPq, 16 |
| 68 movzx TEMPd, BYTE [Yq + TEMPq] |
| 69 movq mm1, [TABLE + 8 * TEMPq] |
| 70 mov TEMPq, Xq |
| 71 add Xq, SOURCE_DX |
| 72 sar TEMPq, 16 |
| 73 movzx TEMPd, BYTE [Yq + TEMPq] |
| 74 movq mm2, [TABLE + 8 * TEMPq] |
| 75 paddsw mm1, mm0 |
| 76 paddsw mm2, mm0 |
| 77 psraw mm1, 6 |
| 78 psraw mm2, 6 |
| 79 packuswb mm1, mm2 |
| 80 MOVQ QWORD [ARGBq], mm1 |
| 81 add ARGBq, 8 |
| 82 |
| 83 .scaleend: |
| 84 ; WIDTH can either be a register or memory depending on this is |
| 85 ; PIC or not. |
| 86 sub WIDTH, 2 |
| 87 jns .scaleloop |
| 88 |
| 89 and WIDTH, 1 ; odd number of pixels? |
| 90 jz .scaledone |
| 91 |
| 92 mov TEMPq, Xq |
| 93 sar TEMPq, 17 |
| 94 movzx TEMPd, BYTE [Uq + TEMPq] |
| 95 movq mm0, [TABLE + 2048 + 8 * TEMPq] |
| 96 mov TEMPq, Xq |
| 97 sar TEMPq, 17 |
| 98 movzx TEMPd, BYTE [Vq + TEMPq] |
| 99 paddsw mm0, [TABLE + 4096 + 8 * TEMPq] |
| 100 mov TEMPq, Xq |
| 101 sar TEMPq, 16 |
| 102 movzx TEMPd, BYTE [Yq + TEMPq] |
| 103 movq mm1, [TABLE + 8 * TEMPq] |
| 104 paddsw mm1, mm0 |
| 105 psraw mm1, 6 |
| 106 packuswb mm1, mm1 |
| 107 movd DWORD [ARGBq], mm1 |
| 108 |
| 109 .scaledone: |
| 110 %ifdef PIC |
| 111 ADD rsp, 2 * gprsize |
| 112 %else |
| 113 ADD rsp, gprsize |
| 114 %endif |
| 115 RET |
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Chromium Code Reviews
Issue 7891039:
Resubmit - Rewrite color space conversions suite using YASM" (Closed)
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