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FFmpeg/libavcodec/x86/fmtconvert_mmx.c

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/*
* Format Conversion Utils
* Copyright (c) 2000, 2001 Fabrice Bellard
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* MMX optimization by Nick Kurshev <nickols_k@mail.ru>
*/
#include "libavutil/cpu.h"
#include "libavutil/x86_cpu.h"
#include "libavcodec/fmtconvert.h"
static void int32_to_float_fmul_scalar_sse(float *dst, const int *src, float mul, int len)
{
x86_reg i = -4*len;
__asm__ volatile(
"movss %3, %%xmm4 \n"
"shufps $0, %%xmm4, %%xmm4 \n"
"1: \n"
"cvtpi2ps (%2,%0), %%xmm0 \n"
"cvtpi2ps 8(%2,%0), %%xmm1 \n"
"cvtpi2ps 16(%2,%0), %%xmm2 \n"
"cvtpi2ps 24(%2,%0), %%xmm3 \n"
"movlhps %%xmm1, %%xmm0 \n"
"movlhps %%xmm3, %%xmm2 \n"
"mulps %%xmm4, %%xmm0 \n"
"mulps %%xmm4, %%xmm2 \n"
"movaps %%xmm0, (%1,%0) \n"
"movaps %%xmm2, 16(%1,%0) \n"
"add $32, %0 \n"
"jl 1b \n"
:"+r"(i)
:"r"(dst+len), "r"(src+len), "m"(mul)
);
}
static void int32_to_float_fmul_scalar_sse2(float *dst, const int *src, float mul, int len)
{
x86_reg i = -4*len;
__asm__ volatile(
"movss %3, %%xmm4 \n"
"shufps $0, %%xmm4, %%xmm4 \n"
"1: \n"
"cvtdq2ps (%2,%0), %%xmm0 \n"
"cvtdq2ps 16(%2,%0), %%xmm1 \n"
"mulps %%xmm4, %%xmm0 \n"
"mulps %%xmm4, %%xmm1 \n"
"movaps %%xmm0, (%1,%0) \n"
"movaps %%xmm1, 16(%1,%0) \n"
"add $32, %0 \n"
"jl 1b \n"
:"+r"(i)
:"r"(dst+len), "r"(src+len), "m"(mul)
);
}
static void float_to_int16_3dnow(int16_t *dst, const float *src, long len){
x86_reg reglen = len;
// not bit-exact: pf2id uses different rounding than C and SSE
__asm__ volatile(
"add %0 , %0 \n\t"
"lea (%2,%0,2) , %2 \n\t"
"add %0 , %1 \n\t"
"neg %0 \n\t"
"1: \n\t"
"pf2id (%2,%0,2) , %%mm0 \n\t"
"pf2id 8(%2,%0,2) , %%mm1 \n\t"
"pf2id 16(%2,%0,2) , %%mm2 \n\t"
"pf2id 24(%2,%0,2) , %%mm3 \n\t"
"packssdw %%mm1 , %%mm0 \n\t"
"packssdw %%mm3 , %%mm2 \n\t"
"movq %%mm0 , (%1,%0) \n\t"
"movq %%mm2 , 8(%1,%0) \n\t"
"add $16 , %0 \n\t"
" js 1b \n\t"
"femms \n\t"
:"+r"(reglen), "+r"(dst), "+r"(src)
);
}
static void float_to_int16_sse(int16_t *dst, const float *src, long len){
x86_reg reglen = len;
__asm__ volatile(
"add %0 , %0 \n\t"
"lea (%2,%0,2) , %2 \n\t"
"add %0 , %1 \n\t"
"neg %0 \n\t"
"1: \n\t"
"cvtps2pi (%2,%0,2) , %%mm0 \n\t"
"cvtps2pi 8(%2,%0,2) , %%mm1 \n\t"
"cvtps2pi 16(%2,%0,2) , %%mm2 \n\t"
"cvtps2pi 24(%2,%0,2) , %%mm3 \n\t"
"packssdw %%mm1 , %%mm0 \n\t"
"packssdw %%mm3 , %%mm2 \n\t"
"movq %%mm0 , (%1,%0) \n\t"
"movq %%mm2 , 8(%1,%0) \n\t"
"add $16 , %0 \n\t"
" js 1b \n\t"
"emms \n\t"
:"+r"(reglen), "+r"(dst), "+r"(src)
);
}
static void float_to_int16_sse2(int16_t *dst, const float *src, long len){
x86_reg reglen = len;
__asm__ volatile(
"add %0 , %0 \n\t"
"lea (%2,%0,2) , %2 \n\t"
"add %0 , %1 \n\t"
"neg %0 \n\t"
"1: \n\t"
"cvtps2dq (%2,%0,2) , %%xmm0 \n\t"
"cvtps2dq 16(%2,%0,2) , %%xmm1 \n\t"
"packssdw %%xmm1 , %%xmm0 \n\t"
"movdqa %%xmm0 , (%1,%0) \n\t"
"add $16 , %0 \n\t"
" js 1b \n\t"
:"+r"(reglen), "+r"(dst), "+r"(src)
);
}
void ff_float_to_int16_interleave6_sse(int16_t *dst, const float **src, int len);
void ff_float_to_int16_interleave6_3dnow(int16_t *dst, const float **src, int len);
void ff_float_to_int16_interleave6_3dn2(int16_t *dst, const float **src, int len);
#if !HAVE_YASM
#define ff_float_to_int16_interleave6_sse(a,b,c) float_to_int16_interleave_misc_sse(a,b,c,6)
#define ff_float_to_int16_interleave6_3dnow(a,b,c) float_to_int16_interleave_misc_3dnow(a,b,c,6)
#define ff_float_to_int16_interleave6_3dn2(a,b,c) float_to_int16_interleave_misc_3dnow(a,b,c,6)
#endif
#define ff_float_to_int16_interleave6_sse2 ff_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_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++){\
float_to_int16_##cpu(tmp, src[c], len);\
for(i=0, j=c; i<len; i++, j+=channels)\
dst[j] = tmp[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){\
x86_reg reglen = len; \
const float *src0 = src[0];\
const float *src1 = src[1];\
__asm__ volatile(\
"shl $2, %0 \n"\
"add %0, %1 \n"\
"add %0, %2 \n"\
"add %0, %3 \n"\
"neg %0 \n"\
body\
:"+r"(reglen), "+r"(dst), "+r"(src0), "+r"(src1)\
);\
}else if(channels==6){\
ff_float_to_int16_interleave6_##cpu(dst, src, len);\
}else\
float_to_int16_interleave_misc_##cpu(dst, src, len, channels);\
}
FLOAT_TO_INT16_INTERLEAVE(3dnow,
"1: \n"
"pf2id (%2,%0), %%mm0 \n"
"pf2id 8(%2,%0), %%mm1 \n"
"pf2id (%3,%0), %%mm2 \n"
"pf2id 8(%3,%0), %%mm3 \n"
"packssdw %%mm1, %%mm0 \n"
"packssdw %%mm3, %%mm2 \n"
"movq %%mm0, %%mm1 \n"
"punpcklwd %%mm2, %%mm0 \n"
"punpckhwd %%mm2, %%mm1 \n"
"movq %%mm0, (%1,%0)\n"
"movq %%mm1, 8(%1,%0)\n"
"add $16, %0 \n"
"js 1b \n"
"femms \n"
)
FLOAT_TO_INT16_INTERLEAVE(sse,
"1: \n"
"cvtps2pi (%2,%0), %%mm0 \n"
"cvtps2pi 8(%2,%0), %%mm1 \n"
"cvtps2pi (%3,%0), %%mm2 \n"
"cvtps2pi 8(%3,%0), %%mm3 \n"
"packssdw %%mm1, %%mm0 \n"
"packssdw %%mm3, %%mm2 \n"
"movq %%mm0, %%mm1 \n"
"punpcklwd %%mm2, %%mm0 \n"
"punpckhwd %%mm2, %%mm1 \n"
"movq %%mm0, (%1,%0)\n"
"movq %%mm1, 8(%1,%0)\n"
"add $16, %0 \n"
"js 1b \n"
"emms \n"
)
FLOAT_TO_INT16_INTERLEAVE(sse2,
"1: \n"
"cvtps2dq (%2,%0), %%xmm0 \n"
"cvtps2dq (%3,%0), %%xmm1 \n"
"packssdw %%xmm1, %%xmm0 \n"
"movhlps %%xmm0, %%xmm1 \n"
"punpcklwd %%xmm1, %%xmm0 \n"
"movdqa %%xmm0, (%1,%0) \n"
"add $16, %0 \n"
"js 1b \n"
)
static void float_to_int16_interleave_3dn2(int16_t *dst, const float **src, long len, int channels){
if(channels==6)
ff_float_to_int16_interleave6_3dn2(dst, src, len);
else
float_to_int16_interleave_3dnow(dst, src, len, channels);
}
void ff_fmt_convert_init_x86(FmtConvertContext *c, AVCodecContext *avctx)
{
int mm_flags = av_get_cpu_flags();
if (mm_flags & AV_CPU_FLAG_MMX) {
if(mm_flags & AV_CPU_FLAG_3DNOW){
if(!(avctx->flags & CODEC_FLAG_BITEXACT)){
c->float_to_int16 = float_to_int16_3dnow;
c->float_to_int16_interleave = float_to_int16_interleave_3dnow;
}
}
if(mm_flags & AV_CPU_FLAG_3DNOWEXT){
if(!(avctx->flags & CODEC_FLAG_BITEXACT)){
c->float_to_int16_interleave = float_to_int16_interleave_3dn2;
}
}
if(mm_flags & AV_CPU_FLAG_SSE){
c->int32_to_float_fmul_scalar = int32_to_float_fmul_scalar_sse;
c->float_to_int16 = float_to_int16_sse;
c->float_to_int16_interleave = float_to_int16_interleave_sse;
}
if(mm_flags & AV_CPU_FLAG_SSE2){
c->int32_to_float_fmul_scalar = int32_to_float_fmul_scalar_sse2;
c->float_to_int16 = float_to_int16_sse2;
c->float_to_int16_interleave = float_to_int16_interleave_sse2;
}
}
}