[SCM] libav/experimental: remove some useless instructions
siretart at users.alioth.debian.org
siretart at users.alioth.debian.org
Sun Jun 30 15:46:51 UTC 2013
The following commit has been merged in the experimental branch:
commit 7a5b2fa812ce33e729638318e410438f8f12c341
Author: Loren Merritt <lorenm at u.washington.edu>
Date: Sat Mar 4 19:56:01 2006 +0000
remove some useless instructions
Originally committed as revision 5109 to svn://svn.ffmpeg.org/ffmpeg/trunk
diff --git a/libavcodec/i386/h264dsp_mmx.c b/libavcodec/i386/h264dsp_mmx.c
index 6db26dd..f46a896 100644
--- a/libavcodec/i386/h264dsp_mmx.c
+++ b/libavcodec/i386/h264dsp_mmx.c
@@ -109,12 +109,9 @@ void ff_h264_idct_dc_add_mmx2(uint8_t *dst, int16_t *block, int stride)
int dc = (block[0] + 32) >> 6;
asm volatile(
"movd %0, %%mm0 \n\t"
- "pxor %%mm7, %%mm7 \n\t"
"pshufw $0, %%mm0, %%mm0 \n\t"
"pxor %%mm1, %%mm1 \n\t"
"psubw %%mm0, %%mm1 \n\t"
- "pmaxsw %%mm7, %%mm0 \n\t"
- "pmaxsw %%mm7, %%mm1 \n\t"
"packuswb %%mm0, %%mm0 \n\t"
"packuswb %%mm1, %%mm1 \n\t"
::"r"(dc)
@@ -149,12 +146,9 @@ void ff_h264_idct8_dc_add_mmx2(uint8_t *dst, int16_t *block, int stride)
int y;
asm volatile(
"movd %0, %%mm0 \n\t"
- "pxor %%mm7, %%mm7 \n\t"
"pshufw $0, %%mm0, %%mm0 \n\t"
"pxor %%mm1, %%mm1 \n\t"
"psubw %%mm0, %%mm1 \n\t"
- "pmaxsw %%mm7, %%mm0 \n\t"
- "pmaxsw %%mm7, %%mm1 \n\t"
"packuswb %%mm0, %%mm0 \n\t"
"packuswb %%mm1, %%mm1 \n\t"
::"r"(dc)
@@ -972,7 +966,6 @@ static void OPNAME ## h264_qpel16_hv_lowpass_ ## MMX(uint8_t *dst, int16_t *tmp,
static void OPNAME ## pixels4_l2_shift5_ ## MMX(uint8_t *dst, int16_t *src16, uint8_t *src8, int dstStride, int src8Stride, int h)\
{\
asm volatile(\
- "pxor %%mm7, %%mm7 \n\t"\
"movq %5, %%mm6 \n\t"\
"movq (%1), %%mm0 \n\t"\
"movq 24(%1), %%mm1 \n\t"\
@@ -980,10 +973,8 @@ static void OPNAME ## pixels4_l2_shift5_ ## MMX(uint8_t *dst, int16_t *src16, ui
"paddw %%mm6, %%mm1 \n\t"\
"psraw $5, %%mm0 \n\t"\
"psraw $5, %%mm1 \n\t"\
- "pmaxsw %%mm7, %%mm0 \n\t"\
- "pmaxsw %%mm7, %%mm1 \n\t"\
- "packuswb %%mm7, %%mm0 \n\t"\
- "packuswb %%mm7, %%mm1 \n\t"\
+ "packuswb %%mm0, %%mm0 \n\t"\
+ "packuswb %%mm1, %%mm1 \n\t"\
PAVGB" (%0), %%mm0 \n\t"\
PAVGB" (%0,%3), %%mm1 \n\t"\
OP(%%mm0, (%2), %%mm4, d)\
@@ -996,10 +987,8 @@ static void OPNAME ## pixels4_l2_shift5_ ## MMX(uint8_t *dst, int16_t *src16, ui
"paddw %%mm6, %%mm1 \n\t"\
"psraw $5, %%mm0 \n\t"\
"psraw $5, %%mm1 \n\t"\
- "pmaxsw %%mm7, %%mm0 \n\t"\
- "pmaxsw %%mm7, %%mm1 \n\t"\
- "packuswb %%mm7, %%mm0 \n\t"\
- "packuswb %%mm7, %%mm1 \n\t"\
+ "packuswb %%mm0, %%mm0 \n\t"\
+ "packuswb %%mm1, %%mm1 \n\t"\
PAVGB" (%0), %%mm0 \n\t"\
PAVGB" (%0,%3), %%mm1 \n\t"\
OP(%%mm0, (%2), %%mm4, d)\
@@ -1011,7 +1000,6 @@ static void OPNAME ## pixels4_l2_shift5_ ## MMX(uint8_t *dst, int16_t *src16, ui
static void OPNAME ## pixels8_l2_shift5_ ## MMX(uint8_t *dst, int16_t *src16, uint8_t *src8, int dstStride, int src8Stride, int h)\
{\
asm volatile(\
- "pxor %%mm7, %%mm7 \n\t"\
"movq %0, %%mm6 \n\t"\
::"m"(ff_pw_16)\
);\
@@ -1023,8 +1011,6 @@ static void OPNAME ## pixels8_l2_shift5_ ## MMX(uint8_t *dst, int16_t *src16, ui
"paddw %%mm6, %%mm1 \n\t"\
"psraw $5, %%mm0 \n\t"\
"psraw $5, %%mm1 \n\t"\
- "pmaxsw %%mm7, %%mm0 \n\t"\
- "pmaxsw %%mm7, %%mm1 \n\t"\
"packuswb %%mm1, %%mm0 \n\t"\
PAVGB" (%0), %%mm0 \n\t"\
OP(%%mm0, (%2), %%mm5, q)\
--
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