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Merge remote-tracking branch 'qatar/master'

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* qatar/master:
  ppc: reduce overreads when loading 8 pixels in altivec dsp functions

Merged-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-02-14 21:59:56 +01:00
commit f11905763c
1 changed files with 10 additions and 10 deletions
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20
libavcodec/ppc/dsputil_altivec.c
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@ -285,10 +285,10 @@ static int sad8_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, in
/* Read potentially unaligned pixels into t1 and t2
Since we're reading 16 pixels, and actually only want 8,
mask out the last 8 pixels. The 0s don't change the sum. */
vector unsigned char pix1l = vec_ld( 0, pix1);
vector unsigned char pix1r = vec_ld(15, pix1);
vector unsigned char pix2l = vec_ld( 0, pix2);
vector unsigned char pix2r = vec_ld(15, pix2);
vector unsigned char pix1l = vec_ld(0, pix1);
vector unsigned char pix1r = vec_ld(7, pix1);
vector unsigned char pix2l = vec_ld(0, pix2);
vector unsigned char pix2r = vec_ld(7, pix2);
t1 = vec_and(vec_perm(pix1l, pix1r, perm1), permclear);
t2 = vec_and(vec_perm(pix2l, pix2r, perm2), permclear);
@ -367,10 +367,10 @@ static int sse8_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, in
/* Read potentially unaligned pixels into t1 and t2
Since we're reading 16 pixels, and actually only want 8,
mask out the last 8 pixels. The 0s don't change the sum. */
vector unsigned char pix1l = vec_ld( 0, pix1);
vector unsigned char pix1r = vec_ld(15, pix1);
vector unsigned char pix2l = vec_ld( 0, pix2);
vector unsigned char pix2r = vec_ld(15, pix2);
vector unsigned char pix1l = vec_ld(0, pix1);
vector unsigned char pix1r = vec_ld(7, pix1);
vector unsigned char pix2l = vec_ld(0, pix2);
vector unsigned char pix2r = vec_ld(7, pix2);
t1 = vec_and(vec_perm(pix1l, pix1r, perm1), permclear);
t2 = vec_and(vec_perm(pix2l, pix2r, perm2), permclear);
@ -489,8 +489,8 @@ static void get_pixels_altivec(int16_t *restrict block, const uint8_t *pixels, i
// Read potentially unaligned pixels.
// We're reading 16 pixels, and actually only want 8,
// but we simply ignore the extras.
vector unsigned char pixl = vec_ld( 0, pixels);
vector unsigned char pixr = vec_ld(15, pixels);
vector unsigned char pixl = vec_ld(0, pixels);
vector unsigned char pixr = vec_ld(7, pixels);
bytes = vec_perm(pixl, pixr, perm);
// convert the bytes into shorts