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Code Issues Releases Activity

add AltiVec implementation of int32_to_float_fmul_scalar

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Originally committed as revision 16186 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Guillaume Poirier 2008-12-17 09:47:06 +00:00
parent 18cb36fd57
commit 5f51afd602
1 changed files with 25 additions and 0 deletions
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25
libavcodec/ppc/float_altivec.c
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@ -150,6 +150,30 @@ static void vector_fmul_add_add_altivec(float *dst, const float *src0,
}
static void int32_to_float_fmul_scalar_altivec(float *dst, const int *src, float mul, int len)
{
union {
vector float v;
float s[4];
} mul_u;
int i;
vector float src1, src2, dst1, dst2, mul_v, zero;
zero = (vector float)vec_splat_u32(0);
mul_u.s[0] = mul;
mul_v = vec_splat(mul_u.v, 0);
for(i=0; i<len; i+=8) {
src1 = vec_ctf(vec_ld(0, src+i), 0);
src2 = vec_ctf(vec_ld(16, src+i), 0);
dst1 = vec_madd(src1, mul_v, zero);
dst2 = vec_madd(src2, mul_v, zero);
vec_st(dst1, 0, dst+i);
vec_st(dst2, 16, dst+i);
}
}
static vector signed short
float_to_int16_one_altivec(const float *src)
{
@ -240,6 +264,7 @@ void float_init_altivec(DSPContext* c, AVCodecContext *avctx)
c->vector_fmul = vector_fmul_altivec;
c->vector_fmul_reverse = vector_fmul_reverse_altivec;
c->vector_fmul_add_add = vector_fmul_add_add_altivec;
c->int32_to_float_fmul_scalar = int32_to_float_fmul_scalar_altivec;
if(!(avctx->flags & CODEC_FLAG_BITEXACT)) {
c->float_to_int16 = float_to_int16_altivec;
c->float_to_int16_interleave = float_to_int16_interleave_altivec;