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get rid of 2 movq (680 -> 658 dezicycles on duron) 

Originally committed as revision 4333 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2005-06-01 11:36:32 +00:00
parent e4b36d4434
commit 987ae784e6
1 changed files with 15 additions and 17 deletions
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32
libavcodec/i386/idct_mmx.c
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@ -614,19 +614,17 @@ declare_idct (ff_mmx_idct, mmx_table,
"psubw "#a", "#b" \n\t"\
"psubw "#c", "#d" \n\t"
/* in: a,b out: a,s */
#define SUMSUBD2_AB( a, b, t, s ) \
"movq "#a", "#s" \n\t"\
#define SUMSUBD2_AB( a, b, t ) \
"movq "#b", "#t" \n\t"\
"psraw $1 , "#b" \n\t"\
"psraw $1 , "#s" \n\t"\
"paddw "#b", "#a" \n\t"\
"psubw "#t", "#s" \n\t"
"paddw "#a", "#b" \n\t"\
"psraw $1 , "#a" \n\t"\
"psubw "#t", "#a" \n\t"
#define IDCT4_1D( s02, s13, d02, d13, t, u ) \
#define IDCT4_1D( s02, s13, d02, d13, t ) \
SUMSUB_BA ( s02, d02 )\
SUMSUBD2_AB( s13, d13, u, t )\
SUMSUB_BADC( s13, s02, t, d02 )
SUMSUBD2_AB( s13, d13, t )\
SUMSUB_BADC( d13, s02, s13, d02 )
#define SBUTTERFLY( a, b, t, n ) \
"movq "#a", "#t" \n\t" /* abcd */\
@ -662,22 +660,22 @@ void ff_h264_idct_add_mmx2(uint8_t *dst, int16_t *block, int stride)
asm volatile(
/* mm1=s02+s13 mm2=s02-s13 mm4=d02+d13 mm0=d02-d13 */
IDCT4_1D( %%mm2, %%mm1, %%mm0, %%mm3, %%mm4, %%mm5 )
IDCT4_1D( %%mm2, %%mm1, %%mm0, %%mm3, %%mm4 )
"movq %0, %%mm6 \n\t"
/* in: 1,4,0,2 out: 1,2,3,0 */
TRANSPOSE4( %%mm1, %%mm4, %%mm0, %%mm2, %%mm3 )
TRANSPOSE4( %%mm3, %%mm1, %%mm0, %%mm2, %%mm4 )
"paddw %%mm6, %%mm1 \n\t"
"paddw %%mm6, %%mm3 \n\t"
/* mm2=s02+s13 mm3=s02-s13 mm4=d02+d13 mm1=d02-d13 */
IDCT4_1D( %%mm3, %%mm2, %%mm1, %%mm0, %%mm4, %%mm5 )
IDCT4_1D( %%mm4, %%mm2, %%mm3, %%mm0, %%mm1 )
"pxor %%mm7, %%mm7 \n\t"
:: "m"(ff_pw_32));
STORE_DIFF_4P( %%mm2, %%mm0, %%mm7, &dst[0*stride] );
STORE_DIFF_4P( %%mm4, %%mm0, %%mm7, &dst[1*stride] );
STORE_DIFF_4P( %%mm1, %%mm0, %%mm7, &dst[2*stride] );
STORE_DIFF_4P( %%mm3, %%mm0, %%mm7, &dst[3*stride] );
STORE_DIFF_4P( %%mm0, %%mm1, %%mm7, &dst[0*stride] );
STORE_DIFF_4P( %%mm2, %%mm1, %%mm7, &dst[1*stride] );
STORE_DIFF_4P( %%mm3, %%mm1, %%mm7, &dst[2*stride] );
STORE_DIFF_4P( %%mm4, %%mm1, %%mm7, &dst[3*stride] );
}