1 ; 2 ; Copyright (c) 2010 The WebM project authors. All Rights Reserved. 3 ; 4 ; Use of this source code is governed by a BSD-style license 5 ; that can be found in the LICENSE file in the root of the source 6 ; tree. An additional intellectual property rights grant can be found 7 ; in the file PATENTS. All contributing project authors may 8 ; be found in the AUTHORS file in the root of the source tree. 9 ; 10 11 %include "third_party/x86inc/x86inc.asm" 12 13 SECTION .text 14 15 ; void vpx_subtract_block(int rows, int cols, 16 ; int16_t *diff, ptrdiff_t diff_stride, 17 ; const uint8_t *src, ptrdiff_t src_stride, 18 ; const uint8_t *pred, ptrdiff_t pred_stride) 19 20 INIT_XMM sse2 21 cglobal subtract_block, 7, 7, 8, \ 22 rows, cols, diff, diff_stride, src, src_stride, \ 23 pred, pred_stride 24 %define pred_str colsq 25 pxor m7, m7 ; dedicated zero register 26 cmp colsd, 4 27 je .case_4 28 cmp colsd, 8 29 je .case_8 30 cmp colsd, 16 31 je .case_16 32 cmp colsd, 32 33 je .case_32 34 35 %macro loop16 6 36 mova m0, [srcq+%1] 37 mova m4, [srcq+%2] 38 mova m1, [predq+%3] 39 mova m5, [predq+%4] 40 punpckhbw m2, m0, m7 41 punpckhbw m3, m1, m7 42 punpcklbw m0, m7 43 punpcklbw m1, m7 44 psubw m2, m3 45 psubw m0, m1 46 punpckhbw m1, m4, m7 47 punpckhbw m3, m5, m7 48 punpcklbw m4, m7 49 punpcklbw m5, m7 50 psubw m1, m3 51 psubw m4, m5 52 mova [diffq+mmsize*0+%5], m0 53 mova [diffq+mmsize*1+%5], m2 54 mova [diffq+mmsize*0+%6], m4 55 mova [diffq+mmsize*1+%6], m1 56 %endmacro 57 58 mov pred_str, pred_stridemp 59 .loop_64: 60 loop16 0*mmsize, 1*mmsize, 0*mmsize, 1*mmsize, 0*mmsize, 2*mmsize 61 loop16 2*mmsize, 3*mmsize, 2*mmsize, 3*mmsize, 4*mmsize, 6*mmsize 62 lea diffq, [diffq+diff_strideq*2] 63 add predq, pred_str 64 add srcq, src_strideq 65 dec rowsd 66 jg .loop_64 67 RET 68 69 .case_32: 70 mov pred_str, pred_stridemp 71 .loop_32: 72 loop16 0, mmsize, 0, mmsize, 0, 2*mmsize 73 lea diffq, [diffq+diff_strideq*2] 74 add predq, pred_str 75 add srcq, src_strideq 76 dec rowsd 77 jg .loop_32 78 RET 79 80 .case_16: 81 mov pred_str, pred_stridemp 82 .loop_16: 83 loop16 0, src_strideq, 0, pred_str, 0, diff_strideq*2 84 lea diffq, [diffq+diff_strideq*4] 85 lea predq, [predq+pred_str*2] 86 lea srcq, [srcq+src_strideq*2] 87 sub rowsd, 2 88 jg .loop_16 89 RET 90 91 %macro loop_h 0 92 movh m0, [srcq] 93 movh m2, [srcq+src_strideq] 94 movh m1, [predq] 95 movh m3, [predq+pred_str] 96 punpcklbw m0, m7 97 punpcklbw m1, m7 98 punpcklbw m2, m7 99 punpcklbw m3, m7 100 psubw m0, m1 101 psubw m2, m3 102 mova [diffq], m0 103 mova [diffq+diff_strideq*2], m2 104 %endmacro 105 106 .case_8: 107 mov pred_str, pred_stridemp 108 .loop_8: 109 loop_h 110 lea diffq, [diffq+diff_strideq*4] 111 lea srcq, [srcq+src_strideq*2] 112 lea predq, [predq+pred_str*2] 113 sub rowsd, 2 114 jg .loop_8 115 RET 116 117 INIT_MMX 118 .case_4: 119 mov pred_str, pred_stridemp 120 .loop_4: 121 loop_h 122 lea diffq, [diffq+diff_strideq*4] 123 lea srcq, [srcq+src_strideq*2] 124 lea predq, [predq+pred_str*2] 125 sub rowsd, 2 126 jg .loop_4 127 RET 128
