| ; |
| ; Copyright (c) 2016, Alliance for Open Media. All rights reserved |
| ; |
| ; This source code is subject to the terms of the BSD 2 Clause License and |
| ; the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License |
| ; was not distributed with this source code in the LICENSE file, you can |
| ; obtain it at www.aomedia.org/license/software. If the Alliance for Open |
| ; Media Patent License 1.0 was not distributed with this source code in the |
| ; PATENTS file, you can obtain it at www.aomedia.org/license/patent. |
| ; |
| |
| ; |
| |
| %include "third_party/x86inc/x86inc.asm" |
| |
| SECTION .text |
| |
| ; void aom_subtract_block(int rows, int cols, |
| ; int16_t *diff, ptrdiff_t diff_stride, |
| ; const uint8_t *src, ptrdiff_t src_stride, |
| ; const uint8_t *pred, ptrdiff_t pred_stride) |
| |
| INIT_XMM sse2 |
| cglobal subtract_block, 7, 7, 8, \ |
| rows, cols, diff, diff_stride, src, src_stride, \ |
| pred, pred_stride |
| %define pred_str colsq |
| pxor m7, m7 ; dedicated zero register |
| cmp colsd, 4 |
| je .case_4 |
| cmp colsd, 8 |
| je .case_8 |
| cmp colsd, 16 |
| je .case_16 |
| cmp colsd, 32 |
| je .case_32 |
| cmp colsd, 64 |
| je .case_64 |
| |
| %macro loop16 6 |
| mova m0, [srcq+%1] |
| mova m4, [srcq+%2] |
| mova m1, [predq+%3] |
| mova m5, [predq+%4] |
| punpckhbw m2, m0, m7 |
| punpckhbw m3, m1, m7 |
| punpcklbw m0, m7 |
| punpcklbw m1, m7 |
| psubw m2, m3 |
| psubw m0, m1 |
| punpckhbw m1, m4, m7 |
| punpckhbw m3, m5, m7 |
| punpcklbw m4, m7 |
| punpcklbw m5, m7 |
| psubw m1, m3 |
| psubw m4, m5 |
| mova [diffq+mmsize*0+%5], m0 |
| mova [diffq+mmsize*1+%5], m2 |
| mova [diffq+mmsize*0+%6], m4 |
| mova [diffq+mmsize*1+%6], m1 |
| %endmacro |
| |
| mov pred_str, pred_stridemp |
| .loop_128: |
| loop16 0*mmsize, 1*mmsize, 0*mmsize, 1*mmsize, 0*mmsize, 2*mmsize |
| loop16 2*mmsize, 3*mmsize, 2*mmsize, 3*mmsize, 4*mmsize, 6*mmsize |
| loop16 4*mmsize, 5*mmsize, 4*mmsize, 5*mmsize, 8*mmsize, 10*mmsize |
| loop16 6*mmsize, 7*mmsize, 6*mmsize, 7*mmsize, 12*mmsize, 14*mmsize |
| lea diffq, [diffq+diff_strideq*2] |
| add predq, pred_str |
| add srcq, src_strideq |
| sub rowsd, 1 |
| jnz .loop_128 |
| RET |
| |
| .case_64: |
| mov pred_str, pred_stridemp |
| .loop_64: |
| loop16 0*mmsize, 1*mmsize, 0*mmsize, 1*mmsize, 0*mmsize, 2*mmsize |
| loop16 2*mmsize, 3*mmsize, 2*mmsize, 3*mmsize, 4*mmsize, 6*mmsize |
| lea diffq, [diffq+diff_strideq*2] |
| add predq, pred_str |
| add srcq, src_strideq |
| dec rowsd |
| jg .loop_64 |
| RET |
| |
| .case_32: |
| mov pred_str, pred_stridemp |
| .loop_32: |
| loop16 0, mmsize, 0, mmsize, 0, 2*mmsize |
| lea diffq, [diffq+diff_strideq*2] |
| add predq, pred_str |
| add srcq, src_strideq |
| dec rowsd |
| jg .loop_32 |
| RET |
| |
| .case_16: |
| mov pred_str, pred_stridemp |
| .loop_16: |
| loop16 0, src_strideq, 0, pred_str, 0, diff_strideq*2 |
| lea diffq, [diffq+diff_strideq*4] |
| lea predq, [predq+pred_str*2] |
| lea srcq, [srcq+src_strideq*2] |
| sub rowsd, 2 |
| jg .loop_16 |
| RET |
| |
| %macro loop_h 0 |
| movh m0, [srcq] |
| movh m2, [srcq+src_strideq] |
| movh m1, [predq] |
| movh m3, [predq+pred_str] |
| punpcklbw m0, m7 |
| punpcklbw m1, m7 |
| punpcklbw m2, m7 |
| punpcklbw m3, m7 |
| psubw m0, m1 |
| psubw m2, m3 |
| mova [diffq], m0 |
| mova [diffq+diff_strideq*2], m2 |
| %endmacro |
| |
| .case_8: |
| mov pred_str, pred_stridemp |
| .loop_8: |
| loop_h |
| lea diffq, [diffq+diff_strideq*4] |
| lea srcq, [srcq+src_strideq*2] |
| lea predq, [predq+pred_str*2] |
| sub rowsd, 2 |
| jg .loop_8 |
| RET |
| |
| INIT_MMX |
| .case_4: |
| mov pred_str, pred_stridemp |
| .loop_4: |
| loop_h |
| lea diffq, [diffq+diff_strideq*4] |
| lea srcq, [srcq+src_strideq*2] |
| lea predq, [predq+pred_str*2] |
| sub rowsd, 2 |
| jg .loop_4 |
| emms |
| RET |