[FFmpeg-cvslog] r14744 - trunk/libavcodec/i386/dsputil_mmx.c
lorenm
subversion
Thu Aug 14 01:36:37 CEST 2008
Author: lorenm
Date: Thu Aug 14 01:36:37 2008
New Revision: 14744
Log:
special case 6 channel version of float_to_int16_interleave
5% faster ac3
Modified:
trunk/libavcodec/i386/dsputil_mmx.c
Modified: trunk/libavcodec/i386/dsputil_mmx.c
==============================================================================
--- trunk/libavcodec/i386/dsputil_mmx.c (original)
+++ trunk/libavcodec/i386/dsputil_mmx.c Thu Aug 14 01:36:37 2008
@@ -2297,9 +2297,54 @@ static void float_to_int16_sse2(int16_t
);
}
+#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_i
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_##
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,
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