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sse opt 

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@3547 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
michael 2001-12-17 00:37:55 +00:00
parent e645783f4a
commit d93f2abce2
1 changed files with 36 additions and 1 deletions
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37
liba52/imdct.c
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@ -370,7 +370,7 @@ imdct_do_512(sample_t data[],sample_t delay[], sample_t bias)
: "%esi"
);
/* C version of the following asm loop
for (m=3; m < 7; m++) {
two_m = (1 << m);
@ -391,6 +391,41 @@ imdct_do_512(sample_t data[],sample_t delay[], sample_t bias)
}
}
}
*/
for (m=3; m < 7; m++) {
two_m = (1 << m);
two_m_plus_one = two_m<<1;
asm volatile(
"movl %0, %%esi \n\t"
".balign 16 \n\t"
"1: \n\t"
"xorl %%edi, %%edi \n\t" // k
"leal (%%esi, %3), %%edx \n\t"
"2: \n\t"
"movaps (%%edx, %%edi), %%xmm1 \n\t"
"movaps (%4, %%edi, 2), %%xmm2 \n\t"
"mulps %%xmm1, %%xmm2 \n\t"
"shufps $0xB1, %%xmm1, %%xmm1 \n\t"
"mulps 16(%4, %%edi, 2), %%xmm1 \n\t"
"movaps (%%esi, %%edi), %%xmm0 \n\t"
"addps %%xmm2, %%xmm1 \n\t"
"movaps %%xmm1, %%xmm2 \n\t"
"addps %%xmm0, %%xmm1 \n\t"
"subps %%xmm2, %%xmm0 \n\t"
"movaps %%xmm1, (%%esi, %%edi) \n\t"
"movaps %%xmm0, (%%edx, %%edi) \n\t"
"addl $16, %%edi \n\t"
"cmpl %3, %%edi \n\t" //FIXME (opt) count against 0
" jb 2b \n\t"
"addl %2, %%esi \n\t"
"cmpl %1, %%esi \n\t"
" jb 1b \n\t"
:: "g" (buf), "m" (buf+128), "m" (two_m_plus_one<<3), "r" (two_m<<3),
"r" (sseW[m])
: "%esi", "%edi", "%edx"
);
}
#else
/* unoptimized variant
for (m=1; m < 7; m++) {