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change vorbis_inverse_coupling_sse2() so it works on sse1 cpus

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Originally committed as revision 5957 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2006-08-08 12:03:51 +00:00
parent ed4e20ac7f
commit 21bb884fb7
1 changed files with 17 additions and 9 deletions
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26
libavcodec/i386/dsputil_mmx.c
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@ -40,6 +40,9 @@ static const uint64_t mm_bone attribute_used __attribute__ ((aligned(8))) = 0x01
static const uint64_t mm_wone attribute_used __attribute__ ((aligned(8))) = 0x0001000100010001ULL;
static const uint64_t mm_wtwo attribute_used __attribute__ ((aligned(8))) = 0x0002000200020002ULL;
static const uint64_t ff_pdw_80000000[2] attribute_used __attribute__ ((aligned(16))) =
{0x8000000080000000ULL, 0x8000000080000000ULL};
static const uint64_t ff_pw_20 attribute_used __attribute__ ((aligned(8))) = 0x0014001400140014ULL;
static const uint64_t ff_pw_3 attribute_used __attribute__ ((aligned(8))) = 0x0003000300030003ULL;
static const uint64_t ff_pw_4 attribute_used __attribute__ ((aligned(8))) = 0x0004000400040004ULL;
@ -2738,22 +2741,27 @@ static void vorbis_inverse_coupling_3dnow(float *mag, float *ang, int blocksize)
}
asm volatile("emms");
}
static void vorbis_inverse_coupling_sse2(float *mag, float *ang, int blocksize)
static void vorbis_inverse_coupling_sse(float *mag, float *ang, int blocksize)
{
int i;
asm volatile(
"movaps %0, %%xmm5 \n\t"
::"m"(ff_pdw_80000000[0])
);
for(i=0; i<blocksize; i+=4) {
asm volatile(
"movaps %0, %%xmm0 \n\t"
"movaps %1, %%xmm1 \n\t"
"pxor %%xmm2, %%xmm2 \n\t"
"pxor %%xmm3, %%xmm3 \n\t"
"xorps %%xmm2, %%xmm2 \n\t"
"xorps %%xmm3, %%xmm3 \n\t"
"cmpleps %%xmm0, %%xmm2 \n\t" // m <= 0.0
"cmpleps %%xmm1, %%xmm3 \n\t" // a <= 0.0
"pslld $31, %%xmm2 \n\t" // keep only the sign bit
"pxor %%xmm2, %%xmm1 \n\t"
"andps %%xmm5, %%xmm2 \n\t" // keep only the sign bit
"xorps %%xmm2, %%xmm1 \n\t"
"movaps %%xmm3, %%xmm4 \n\t"
"pand %%xmm1, %%xmm3 \n\t"
"pandn %%xmm1, %%xmm4 \n\t"
"andps %%xmm1, %%xmm3 \n\t"
"andnps %%xmm1, %%xmm4 \n\t"
"addps %%xmm0, %%xmm3 \n\t" // a = m + ((a<0) & (a ^ sign(m)))
"subps %%xmm4, %%xmm0 \n\t" // m = m + ((a>0) & (a ^ sign(m)))
"movaps %%xmm3, %1 \n\t"
@ -3191,8 +3199,8 @@ void dsputil_init_mmx(DSPContext* c, AVCodecContext *avctx)
}
#endif
if(mm_flags & MM_SSE2)
c->vorbis_inverse_coupling = vorbis_inverse_coupling_sse2;
if(mm_flags & MM_SSE)
c->vorbis_inverse_coupling = vorbis_inverse_coupling_sse;
else if(mm_flags & MM_3DNOW)
c->vorbis_inverse_coupling = vorbis_inverse_coupling_3dnow;
}