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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 <michaelni@gmx.at>
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@ -344,10 +344,6 @@ VERTICAL_EXTEND 16, 22
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; obviously not the same on both sides.
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%macro READ_V_PIXEL 2
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%if %1 == 2
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movzx valw, byte %2
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imul valw, 0x0101
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%else
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movzx vald, byte %2
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imul vald, 0x01010101
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%if %1 >= 8
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@ -356,13 +352,15 @@ VERTICAL_EXTEND 16, 22
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pshufd m0, m0, q0000
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%else
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punpckldq m0, m0
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%endif
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%endif ; %1 >= 8
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%endif
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%endif ; mmsize == 16
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%endif ; %1 > 16
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%endmacro ; READ_V_PIXEL
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%macro WRITE_V_PIXEL 2
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%assign %%off 0
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%if %1 >= 8
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%rep %1/mmsize
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movu [%2+%%off], m0
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%assign %%off %%off+mmsize
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@ -378,27 +376,29 @@ VERTICAL_EXTEND 16, 22
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%assign %%off %%off+8
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%endif
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%endif ; %1-%%off >= 8
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%endif
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%endif ; mmsize == 16
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%if %1-%%off >= 4
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%if %1 > 8 && %1-%%off > 4
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movq [%2+%1-8], m0
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%assign %%off %1
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%elif %1 >= 8 && %1-%%off >= 4
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movd [%2+%%off], m0
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%assign %%off %%off+4
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%else
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mov [%2+%%off], vald
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movd [%2+%%off], m0
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%assign %%off %%off+4
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%endif
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%endif ; %1-%%off >= 4
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%if %1-%%off >= 2
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%if %1 >= 8
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movd [%2+%1-4], m0
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%else
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%else ; %1 < 8
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%rep %1/4
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mov [%2+%%off], vald
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%assign %%off %%off+4
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%endrep ; %1/4
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%endif ; %1 >=/< 8
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%if %1-%%off == 2
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mov [%2+%%off], valw
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%endif
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%endif ; (%1-%%off)/2
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%endmacro ; WRITE_V_PIXEL
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