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commit 714cbf1c70a8312ea11f1fb718d56762ff6658cb Author: Andreas Rheinhardt <[email protected]> AuthorDate: Mon Nov 24 09:16:26 2025 +0100 Commit: Andreas Rheinhardt <[email protected]> CommitDate: Thu Dec 4 15:17:37 2025 +0100 avcodec/x86/vp8dsp: Don't use MMX registers in ff_put_vp8_epel4_v4_ssse3 Switching to xmm registers allows to process two rows in parallel, leading to speedups. It is also ABI compliant (no more missing emms). Old benchmarks: vp8_put_epel4_v4_c: 96.8 ( 1.00x) vp8_put_epel4_v4_ssse3: 28.2 ( 3.43x) New benchmarks: vp8_put_epel4_v4_c: 95.1 ( 1.00x) vp8_put_epel4_v4_ssse3: 22.8 ( 4.17x) Reviewed-by: Ronald S. Bultje <[email protected]> Signed-off-by: Andreas Rheinhardt <[email protected]> --- libavcodec/x86/vp8dsp.asm | 36 +++++++++++++++++++++++++++++++----- 1 file changed, 31 insertions(+), 5 deletions(-) diff --git a/libavcodec/x86/vp8dsp.asm b/libavcodec/x86/vp8dsp.asm index 4778944ac7..fd60feaf1f 100644 --- a/libavcodec/x86/vp8dsp.asm +++ b/libavcodec/x86/vp8dsp.asm @@ -238,6 +238,7 @@ cglobal put_vp8_epel%1_h4, 6, 6 + npicregs, 7, dst, dststride, src, srcstride, h jg .nextrow RET +INIT_XMM ssse3 cglobal put_vp8_epel%1_v4, 7, 7, 8, dst, dststride, src, srcstride, height, picreg, my shl myd, 4 %if PIC @@ -250,13 +251,38 @@ cglobal put_vp8_epel%1_v4, 7, 7, 8, dst, dststride, src, srcstride, height, picr ; read 3 lines mov picregq, srcstrideq neg picregq - movh m0, [srcq+picregq] - movh m1, [srcq] - movh m2, [srcq+srcstrideq] + MOV m0, [srcq+picregq] + MOV m1, [srcq] + MOV m2, [srcq+srcstrideq] + lea srcq, [srcq+2*srcstrideq] punpcklbw m0, m2 +%if %1 == 4 +.next2rows: + movd m3, [srcq] + movd m4, [srcq+srcstrideq] + punpcklbw m1, m3 + punpcklqdq m0, m1 + punpcklbw m2, m4 + pmaddubsw m0, m5 + punpcklqdq m1, m2 + pmaddubsw m1, m6 + lea srcq, [srcq+2*srcstrideq] + paddsw m1, m0 + pmulhrsw m1, m7 + mova m0, m2 + packuswb m1, m1 + movd [dstq], m1 + mova m2, m4 + psrldq m1, 4 + movd [dstq+dststrideq], m1 + mova m1, m3 + lea dstq, [dstq+2*dststrideq] + sub heightd, 2 + jg .next2rows +%else .nextrow: - movh m3, [srcq+2*srcstrideq] ; read new row + movh m3, [srcq] ; read new row pmaddubsw m0, m5 punpcklbw m1, m3 pmaddubsw m4, m1, m6 @@ -273,9 +299,9 @@ cglobal put_vp8_epel%1_v4, 7, 7, 8, dst, dststride, src, srcstride, height, picr add dstq, dststrideq dec heightd ; next row jg .nextrow +%endif RET -INIT_XMM ssse3 cglobal put_vp8_epel%1_v6, 7, 7, 8, dst, dststride, src, srcstride, height, picreg, my lea myd, [myq*3] %if PIC _______________________________________________ ffmpeg-cvslog mailing list -- [email protected] To unsubscribe send an email to [email protected]
