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Reduce number of ASM constraints for ff_lpc_compute_autocorr_sse2 since it

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causes no significant speed difference and can avoid compilation issues with
--enable-pic.

Originally committed as revision 21003 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Reimar Döffinger 2010-01-02 17:48:08 +00:00
parent cd44b2e307
commit 4a1289450a
1 changed files with 10 additions and 9 deletions
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19
libavcodec/x86/lpc_mmx.c
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@ -89,12 +89,12 @@ void ff_lpc_compute_autocorr_sse2(const int32_t *data, int len, int lag,
"movsd "MANGLE(ff_pd_1)", %%xmm1 \n\t"
"movsd "MANGLE(ff_pd_1)", %%xmm2 \n\t"
"1: \n\t"
"movapd (%4,%0), %%xmm3 \n\t"
"movupd -8(%5,%0), %%xmm4 \n\t"
"movapd (%5,%0), %%xmm5 \n\t"
"movapd (%2,%0), %%xmm3 \n\t"
"movupd -8(%3,%0), %%xmm4 \n\t"
"movapd (%3,%0), %%xmm5 \n\t"
"mulpd %%xmm3, %%xmm4 \n\t"
"mulpd %%xmm3, %%xmm5 \n\t"
"mulpd -16(%5,%0), %%xmm3 \n\t"
"mulpd -16(%3,%0), %%xmm3 \n\t"
"addpd %%xmm4, %%xmm1 \n\t"
"addpd %%xmm5, %%xmm0 \n\t"
"addpd %%xmm3, %%xmm2 \n\t"
@ -106,11 +106,12 @@ void ff_lpc_compute_autocorr_sse2(const int32_t *data, int len, int lag,
"addsd %%xmm3, %%xmm0 \n\t"
"addsd %%xmm4, %%xmm1 \n\t"
"addsd %%xmm5, %%xmm2 \n\t"
"movsd %%xmm0, %1 \n\t"
"movsd %%xmm1, %2 \n\t"
"movsd %%xmm2, %3 \n\t"
:"+&r"(i), "=m"(autoc[j]), "=m"(autoc[j+1]), "=m"(autoc[j+2])
:"r"(data1+len), "r"(data1+len-j)
"movsd %%xmm0, (%1) \n\t"
"movsd %%xmm1, 8(%1) \n\t"
"movsd %%xmm2, 16(%1) \n\t"
:"+&r"(i)
:"r"(autoc+j), "r"(data1+len), "r"(data1+len-j)
:"memory"
);
} else {
__asm__ volatile(