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special case 6 channel version of float_to_int16_interleave

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5% faster ac3

Originally committed as revision 14744 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Loren Merritt 2008-08-13 23:36:37 +00:00
parent 911e21a306
commit 675872382f
1 changed files with 51 additions and 5 deletions
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56
libavcodec/i386/dsputil_mmx.c
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@ -2297,9 +2297,54 @@ static void float_to_int16_sse2(int16_t *dst, const float *src, long len){
);
}
#ifdef HAVE_7REGS
#define FLOAT_TO_INT16_INTERLEAVE6(cpu, cvtps2pi, pswapd) \
static void float_to_int16_interleave6_##cpu(int16_t *dst, const float **src, int len){\
const float *src0 = src[0];\
asm volatile(\
"1: \n"\
cvtps2pi" (%2), %%mm0 \n"\
cvtps2pi" (%2,%3), %%mm1 \n"\
cvtps2pi" (%2,%4), %%mm2 \n"\
cvtps2pi" (%2,%5), %%mm3 \n"\
cvtps2pi" (%2,%6), %%mm4 \n"\
cvtps2pi" (%2,%7), %%mm5 \n"\
"packssdw %%mm3, %%mm0 \n"\
"packssdw %%mm4, %%mm1 \n"\
"packssdw %%mm5, %%mm2 \n"\
pswapd" %%mm0, %%mm3 \n"\
"punpcklwd %%mm1, %%mm0 \n"\
"punpckhwd %%mm2, %%mm1 \n"\
"punpcklwd %%mm3, %%mm2 \n"\
pswapd" %%mm0, %%mm3 \n"\
"punpckldq %%mm2, %%mm0 \n"\
"punpckhdq %%mm1, %%mm2 \n"\
"punpckldq %%mm3, %%mm1 \n"\
"movq %%mm0, (%1) \n"\
"movq %%mm2, 16(%1) \n"\
"movq %%mm1, 8(%1) \n"\
"add $8, %2 \n"\
"add $24, %1 \n"\
"sub $2, %0 \n"\
"jg 1b \n"\
"emms \n"\
:"+g"(len), "+r"(dst), "+r"(src0)\
:"r"(4*(src[1]-src0)), "r"(4*(src[2]-src0)),\
"r"(4*(src[3]-src0)), "r"(4*(src[4]-src0)),\
"r"(4*(src[5]-src0))\
);\
}
FLOAT_TO_INT16_INTERLEAVE6(sse, "cvtps2pi", "pshufw $0x4e,")
FLOAT_TO_INT16_INTERLEAVE6(3dnow, "pf2id", "pswapd")
#else
#define float_to_int16_interleave6_sse(a,b,c) float_to_int16_interleave_misc_sse(a,b,c,6)
#define float_to_int16_interleave6_3dnow(a,b,c) float_to_int16_interleave_misc_3dnow(a,b,c,6)
#endif
#define float_to_int16_interleave6_sse2 float_to_int16_interleave6_sse
#define FLOAT_TO_INT16_INTERLEAVE(cpu, body) \
/* gcc pessimizes register allocation if this is in the same function as float_to_int16_interleave_sse2*/\
static av_noinline void float_to_int16_interleave2_##cpu(int16_t *dst, const float **src, long len, int channels){\
static av_noinline void float_to_int16_interleave_misc_##cpu(int16_t *dst, const float **src, long len, int channels){\
DECLARE_ALIGNED_16(int16_t, tmp[len]);\
int i,j,c;\
for(c=0; c<channels; c++){\
@ -2312,9 +2357,7 @@ static av_noinline void float_to_int16_interleave2_##cpu(int16_t *dst, const flo
static void float_to_int16_interleave_##cpu(int16_t *dst, const float **src, long len, int channels){\
if(channels==1)\
float_to_int16_##cpu(dst, src[0], len);\
else if(channels>2)\
float_to_int16_interleave2_##cpu(dst, src, len, channels);\
else{\
else if(channels==2){\
const float *src0 = src[0];\
const float *src1 = src[1];\
asm volatile(\
@ -2326,7 +2369,10 @@ static void float_to_int16_interleave_##cpu(int16_t *dst, const float **src, lon
body\
:"+r"(len), "+r"(dst), "+r"(src0), "+r"(src1)\
);\
}\
}else if(channels==6){\
float_to_int16_interleave6_##cpu(dst, src, len);\
}else\
float_to_int16_interleave_misc_##cpu(dst, src, len, channels);\
}
FLOAT_TO_INT16_INTERLEAVE(3dnow,