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ffmpeg.wasm-core
Commit ef423a66 authored by Michael Niedermayer's avatar Michael Niedermayer
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Make horizontal mmx scaling code match C code. 

Originally committed as revision 27596 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale
parent 88bc5a64
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Showing with 15 additions and 16 deletions
libswscale/swscale_template.c
View file @ ef423a66
......@@ -2170,7 +2170,6 @@ static inline void RENAME(hScale)(int16_t *dst, int dstW, uint8_t *src, int srcW
"push %%"REG_b" \n\t"
#endif
"pxor %%mm7, %%mm7 \n\t"
"movq "MANGLE(w02)", %%mm6 \n\t"
"push %%"REG_BP" \n\t" // we use 7 regs here ...
"mov %%"REG_a", %%"REG_BP" \n\t"
ASMALIGN(4)
......@@ -2185,10 +2184,11 @@ static inline void RENAME(hScale)(int16_t *dst, int dstW, uint8_t *src, int srcW
"punpcklbw %%mm7, %%mm2 \n\t"
"pmaddwd %%mm1, %%mm0 \n\t"
"pmaddwd %%mm2, %%mm3 \n\t"
"psrad $8, %%mm0 \n\t"
"psrad $8, %%mm3 \n\t"
"packssdw %%mm3, %%mm0 \n\t"
"pmaddwd %%mm6, %%mm0 \n\t"
"movq %%mm0, %%mm4 \n\t"
"punpckldq %%mm3, %%mm0 \n\t"
"punpckhdq %%mm3, %%mm4 \n\t"
"paddd %%mm4, %%mm0 \n\t"
"psrad $7, %%mm0 \n\t"
"packssdw %%mm0, %%mm0 \n\t"
"movd %%mm0, (%4, %%"REG_BP") \n\t"
"add $4, %%"REG_BP" \n\t"
......@@ -2216,7 +2216,6 @@ static inline void RENAME(hScale)(int16_t *dst, int dstW, uint8_t *src, int srcW
"push %%"REG_b" \n\t"
#endif
"pxor %%mm7, %%mm7 \n\t"
"movq "MANGLE(w02)", %%mm6 \n\t"
"push %%"REG_BP" \n\t" // we use 7 regs here ...
"mov %%"REG_a", %%"REG_BP" \n\t"
ASMALIGN(4)
......@@ -2242,11 +2241,11 @@ static inline void RENAME(hScale)(int16_t *dst, int dstW, uint8_t *src, int srcW
"pmaddwd %%mm2, %%mm5 \n\t"
"paddd %%mm4, %%mm0 \n\t"
"paddd %%mm5, %%mm3 \n\t"
"psrad $8, %%mm0 \n\t"
"psrad $8, %%mm3 \n\t"
"packssdw %%mm3, %%mm0 \n\t"
"pmaddwd %%mm6, %%mm0 \n\t"
"movq %%mm0, %%mm4 \n\t"
"punpckldq %%mm3, %%mm0 \n\t"
"punpckhdq %%mm3, %%mm4 \n\t"
"paddd %%mm4, %%mm0 \n\t"
"psrad $7, %%mm0 \n\t"
"packssdw %%mm0, %%mm0 \n\t"
"movd %%mm0, (%4, %%"REG_BP") \n\t"
"add $4, %%"REG_BP" \n\t"
......@@ -2272,7 +2271,6 @@ static inline void RENAME(hScale)(int16_t *dst, int dstW, uint8_t *src, int srcW
dst-= counter/2;
asm volatile(
"pxor %%mm7, %%mm7 \n\t"
"movq "MANGLE(w02)", %%mm6 \n\t"
ASMALIGN(4)
"1: \n\t"
"mov %2, %%"REG_c" \n\t"
......@@ -2297,10 +2295,11 @@ static inline void RENAME(hScale)(int16_t *dst, int dstW, uint8_t *src, int srcW
"cmp %4, %%"REG_c" \n\t"
" jb 2b \n\t"
"add %6, %1 \n\t"
"psrad $8, %%mm4 \n\t"
"psrad $8, %%mm5 \n\t"
"packssdw %%mm5, %%mm4 \n\t"
"pmaddwd %%mm6, %%mm4 \n\t"
"movq %%mm4, %%mm0 \n\t"
"punpckldq %%mm5, %%mm4 \n\t"
"punpckhdq %%mm5, %%mm0 \n\t"
"paddd %%mm0, %%mm4 \n\t"
"psrad $7, %%mm4 \n\t"
"packssdw %%mm4, %%mm4 \n\t"
"mov %3, %%"REG_a" \n\t"
"movd %%mm4, (%%"REG_a", %0) \n\t"
......
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