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put loop counter in a register if possible. makes some of the qpel functions 3% faster. 

Originally committed as revision 11876 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Loren Merritt 2008-02-06 04:44:21 +00:00
parent 7080ec2937
commit 20d565be6d
2 changed files with 6 additions and 6 deletions
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4
libavcodec/i386/dsputil_mmx.c
View File

@ -2061,7 +2061,7 @@ static void OPNAME ## mpeg4_qpel16_h_lowpass_mmx2(uint8_t *dst, uint8_t *src, in
"add %4, %1 \n\t"\
"decl %2 \n\t"\
" jnz 1b \n\t"\
: "+a"(src), "+c"(dst), "+m"(h)\
: "+a"(src), "+c"(dst), "+g"(h)\
: "d"((long)srcStride), "S"((long)dstStride), /*"m"(ff_pw_20), "m"(ff_pw_3),*/ "m"(temp), "m"(ROUNDER)\
: "memory"\
);\
@ -2174,7 +2174,7 @@ static void OPNAME ## mpeg4_qpel8_h_lowpass_mmx2(uint8_t *dst, uint8_t *src, int
"add %4, %1 \n\t"\
"decl %2 \n\t"\
" jnz 1b \n\t"\
: "+a"(src), "+c"(dst), "+m"(h)\
: "+a"(src), "+c"(dst), "+g"(h)\
: "S"((long)srcStride), "D"((long)dstStride), /*"m"(ff_pw_20), "m"(ff_pw_3),*/ "m"(temp), "m"(ROUNDER)\
: "memory"\
);\

8
libavcodec/i386/h264dsp_mmx.c
View File

@ -796,7 +796,7 @@ static av_noinline void OPNAME ## h264_qpel4_h_lowpass_ ## MMX(uint8_t *dst, uin
"add %4, %1 \n\t"\
"decl %2 \n\t"\
" jnz 1b \n\t"\
: "+a"(src), "+c"(dst), "+m"(h)\
: "+a"(src), "+c"(dst), "+g"(h)\
: "d"((long)srcStride), "S"((long)dstStride), "m"(ff_pw_5), "m"(ff_pw_16)\
: "memory"\
);\
@ -930,7 +930,7 @@ static av_noinline void OPNAME ## h264_qpel4_hv_lowpass_ ## MMX(uint8_t *dst, in
"add %3, %1 \n\t"\
"decl %2 \n\t"\
" jnz 1b \n\t"\
: "+a"(tmp), "+c"(dst), "+m"(h)\
: "+a"(tmp), "+c"(dst), "+g"(h)\
: "S"((long)dstStride)\
: "memory"\
);\
@ -987,7 +987,7 @@ static av_noinline void OPNAME ## h264_qpel8_h_lowpass_ ## MMX(uint8_t *dst, uin
"add %4, %1 \n\t"\
"decl %2 \n\t"\
" jnz 1b \n\t"\
: "+a"(src), "+c"(dst), "+m"(h)\
: "+a"(src), "+c"(dst), "+g"(h)\
: "d"((long)srcStride), "S"((long)dstStride), "m"(ff_pw_5), "m"(ff_pw_16)\
: "memory"\
);\
@ -1201,7 +1201,7 @@ static av_noinline void OPNAME ## h264_qpel8or16_hv_lowpass_ ## MMX(uint8_t *dst
"add %3, %1 \n\t"\
"decl %2 \n\t"\
" jnz 1b \n\t"\
: "+a"(tmp), "+c"(dst), "+m"(h)\
: "+a"(tmp), "+c"(dst), "+g"(h)\
: "S"((long)dstStride)\
: "memory"\
);\