From 960490c0b20dd5f9a6c329bd14023b9598082fda Mon Sep 17 00:00:00 2001 From: "Ronald S. Bultje" Date: Sat, 26 Oct 2013 08:24:09 -0400 Subject: [PATCH] avcodec/x86/videodsp: Small speedups in ff_emulated_edge_mc x86 SIMD. Don't use word-size multiplications if size == 2, and if we're using SIMD instructions (size >= 8), complete leftover 4byte sets using movd, not mov. Both of these changes lead to minor speedups. Signed-off-by: Michael Niedermayer --- libavcodec/x86/videodsp.asm | 34 +++++++++++++++++----------------- 1 file changed, 17 insertions(+), 17 deletions(-) diff --git a/libavcodec/x86/videodsp.asm b/libavcodec/x86/videodsp.asm index 85a41b5b6d..1ac02574d6 100644 --- a/libavcodec/x86/videodsp.asm +++ b/libavcodec/x86/videodsp.asm @@ -344,10 +344,6 @@ VERTICAL_EXTEND 16, 22 ; obviously not the same on both sides. %macro READ_V_PIXEL 2 -%if %1 == 2 - movzx valw, byte %2 - imul valw, 0x0101 -%else movzx vald, byte %2 imul vald, 0x01010101 %if %1 >= 8 @@ -356,13 +352,15 @@ VERTICAL_EXTEND 16, 22 pshufd m0, m0, q0000 %else punpckldq m0, m0 -%endif -%endif ; %1 >= 8 -%endif +%endif ; mmsize == 16 +%endif ; %1 > 16 %endmacro ; READ_V_PIXEL %macro WRITE_V_PIXEL 2 %assign %%off 0 + +%if %1 >= 8 + %rep %1/mmsize movu [%2+%%off], m0 %assign %%off %%off+mmsize @@ -378,27 +376,29 @@ VERTICAL_EXTEND 16, 22 %assign %%off %%off+8 %endif %endif ; %1-%%off >= 8 -%endif +%endif ; mmsize == 16 %if %1-%%off >= 4 %if %1 > 8 && %1-%%off > 4 movq [%2+%1-8], m0 %assign %%off %1 -%elif %1 >= 8 && %1-%%off >= 4 - movd [%2+%%off], m0 -%assign %%off %%off+4 %else - mov [%2+%%off], vald + movd [%2+%%off], m0 %assign %%off %%off+4 %endif %endif ; %1-%%off >= 4 -%if %1-%%off >= 2 -%if %1 >= 8 - movd [%2+%1-4], m0 -%else +%else ; %1 < 8 + +%rep %1/4 + mov [%2+%%off], vald +%assign %%off %%off+4 +%endrep ; %1/4 + +%endif ; %1 >=/< 8 + +%if %1-%%off == 2 mov [%2+%%off], valw -%endif %endif ; (%1-%%off)/2 %endmacro ; WRITE_V_PIXEL