ffmpeg/FFmpeg
1
0
Fork 0
mirror of https://git.ffmpeg.org/ffmpeg.git synced 2024-09-20 21:36:48 +00:00
Code Issues Packages Projects Releases Wiki Activity

replace a few mov + psrlq with pshufw, there are more cases which could benefit from this but they would require us to duplicate some functions ...

Browse Source 
the trick is from various places (my own code in libpostproc, a patch on the x264 list, ...)

Originally committed as revision 4608 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2005-09-21 21:17:09 +00:00
parent dc9f52602f
commit 12e9668119
2 changed files with 17 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
libavcodec/i386/dsputil_mmx.c
View File

@ -1621,11 +1621,9 @@ static int hadamard8_diff_mmx2(void *s, uint8_t *src1, uint8_t *src2, int stride
"movq 64(%1), %%mm1 \n\t"
MMABS_SUM_MMX2(%%mm1, %%mm7, %%mm0)
"movq %%mm0, %%mm1 \n\t"
"psrlq $32, %%mm0 \n\t"
"pshufw $0x0E, %%mm0, %%mm1 \n\t"
"paddusw %%mm1, %%mm0 \n\t"
"movq %%mm0, %%mm1 \n\t"
"psrlq $16, %%mm0 \n\t"
"pshufw $0x01, %%mm0, %%mm1 \n\t"
"paddusw %%mm1, %%mm0 \n\t"
"movd %%mm0, %0 \n\t"

28
libavcodec/i386/mpegvideo_mmx_template.c
View File

@ -22,7 +22,11 @@
#ifdef HAVE_MMX2
#define SPREADW(a) "pshufw $0, " #a ", " #a " \n\t"
#define PMAXW(a,b) "pmaxsw " #a ", " #b " \n\t"
#define PMAX(a,b) \
"pshufw $0x0E," #a ", " #b " \n\t"\
PMAXW(b, a)\
"pshufw $0x01," #a ", " #b " \n\t"\
PMAXW(b, a)
#else
#define SPREADW(a) \
"punpcklwd " #a ", " #a " \n\t"\
@ -30,6 +34,14 @@
#define PMAXW(a,b) \
"psubusw " #a ", " #b " \n\t"\
"paddw " #a ", " #b " \n\t"
#define PMAX(a,b) \
"movq " #a ", " #b " \n\t"\
"psrlq $32, " #a " \n\t"\
PMAXW(b, a)\
"movq " #a ", " #b " \n\t"\
"psrlq $16, " #a " \n\t"\
PMAXW(b, a)
#endif
static int RENAME(dct_quantize)(MpegEncContext *s,
@ -119,12 +131,7 @@ static int RENAME(dct_quantize)(MpegEncContext *s,
PMAXW(%%mm0, %%mm3)
"add $8, %%"REG_a" \n\t"
" js 1b \n\t"
"movq %%mm3, %%mm0 \n\t"
"psrlq $32, %%mm3 \n\t"
PMAXW(%%mm0, %%mm3)
"movq %%mm3, %%mm0 \n\t"
"psrlq $16, %%mm3 \n\t"
PMAXW(%%mm0, %%mm3)
PMAX(%%mm3, %%mm0)
"movd %%mm3, %%"REG_a" \n\t"
"movzb %%al, %%"REG_a" \n\t" // last_non_zero_p1
: "+a" (last_non_zero_p1)
@ -170,12 +177,7 @@ static int RENAME(dct_quantize)(MpegEncContext *s,
PMAXW(%%mm0, %%mm3)
"add $8, %%"REG_a" \n\t"
" js 1b \n\t"
"movq %%mm3, %%mm0 \n\t"
"psrlq $32, %%mm3 \n\t"
PMAXW(%%mm0, %%mm3)
"movq %%mm3, %%mm0 \n\t"
"psrlq $16, %%mm3 \n\t"
PMAXW(%%mm0, %%mm3)
PMAX(%%mm3, %%mm0)
"movd %%mm3, %%"REG_a" \n\t"
"movzb %%al, %%"REG_a" \n\t" // last_non_zero_p1
: "+a" (last_non_zero_p1)