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Code Issues Releases Activity

Update Altivec variant of vc1_inv_trans_8x4

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Originally committed as revision 11190 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Kostya Shishkov 2007-12-08 11:45:42 +00:00
parent 8df7cfe97c
commit 51ece6842f
1 changed files with 23 additions and 29 deletions
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52
libavcodec/ppc/vc1dsp_altivec.c
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@ -227,7 +227,7 @@ static void vc1_inv_trans_8x8_altivec(DCTELEM block[64])
/** Do inverse transform on 8x4 part of block
*/
static void vc1_inv_trans_8x4_altivec(DCTELEM block[64], int n)
static void vc1_inv_trans_8x4_altivec(uint8_t *dest, int stride, DCTELEM *block)
{
vector signed short src0, src1, src2, src3, src4, src5, src6, src7;
vector signed int s0, s1, s2, s3, s4, s5, s6, s7;
@ -241,6 +241,9 @@ static void vc1_inv_trans_8x4_altivec(DCTELEM block[64], int n)
const vector unsigned int vec_3 = vec_splat_u32(3);
const vector unsigned int vec_2 = vec_splat_u32(2);
const vector unsigned int vec_1 = vec_splat_u32(1);
vector unsigned char tmp;
vector signed short tmp2, tmp3;
vector unsigned char perm0, perm1, p0, p1, p;
src0 = vec_ld( 0, block);
src1 = vec_ld( 16, block);
@ -282,7 +285,6 @@ static void vc1_inv_trans_8x4_altivec(DCTELEM block[64], int n)
src7 = vec_pack(sF, s7);
TRANSPOSE8(src0, src1, src2, src3, src4, src5, src6, src7);
if(!n){ // upper half of block
s0 = vec_unpackh(src0);
s1 = vec_unpackh(src1);
s2 = vec_unpackh(src2);
@ -300,37 +302,29 @@ static void vc1_inv_trans_8x4_altivec(DCTELEM block[64], int n)
src2 = vec_pack(s2, sA);
src3 = vec_pack(s3, sB);
vec_st(src0, 0, block);
vec_st(src1, 16, block);
vec_st(src2, 32, block);
vec_st(src3, 48, block);
} else { //lower half of block
s0 = vec_unpackh(src4);
s1 = vec_unpackh(src5);
s2 = vec_unpackh(src6);
s3 = vec_unpackh(src7);
s8 = vec_unpackl(src4);
s9 = vec_unpackl(src5);
sA = vec_unpackl(src6);
sB = vec_unpackl(src7);
STEP4(s0, s1, s2, s3, vec_64);
SHIFT_VERT4(s0, s1, s2, s3);
STEP4(s8, s9, sA, sB, vec_64);
SHIFT_VERT4(s8, s9, sA, sB);
src4 = vec_pack(s0, s8);
src5 = vec_pack(s1, s9);
src6 = vec_pack(s2, sA);
src7 = vec_pack(s3, sB);
p0 = vec_lvsl (0, dest);
p1 = vec_lvsl (stride, dest);
p = vec_splat_u8 (-1);
perm0 = vec_mergeh (p, p0);
perm1 = vec_mergeh (p, p1);
vec_st(src4, 64, block);
vec_st(src5, 80, block);
vec_st(src6, 96, block);
vec_st(src7,112, block);
}
#define ADD(dest,src,perm) \
/* *(uint64_t *)&tmp = *(uint64_t *)dest; */ \
tmp = vec_ld (0, dest); \
tmp2 = (vector unsigned int)vec_perm (tmp, vec_splat_u8(0), perm); \
tmp3 = vec_adds (tmp2, src); \
tmp = vec_packsu (tmp3, tmp3); \
vec_ste ((vector unsigned int)tmp, 0, (unsigned int *)dest); \
vec_ste ((vector unsigned int)tmp, 4, (unsigned int *)dest);
ADD (dest, src0, perm0) dest += stride;
ADD (dest, src1, perm1) dest += stride;
ADD (dest, src2, perm0) dest += stride;
ADD (dest, src3, perm1)
}
void vc1dsp_init_altivec(DSPContext* dsp, AVCodecContext *avctx) {
dsp->vc1_inv_trans_8x8 = vc1_inv_trans_8x8_altivec;
//dsp->vc1_inv_trans_8x4 = vc1_inv_trans_8x4_altivec;
dsp->vc1_inv_trans_8x4 = vc1_inv_trans_8x4_altivec;
}