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ppc: pixblockdsp: do unaligned block accesses correctly again

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This was broken by the following Libav commit:
4c387c7 ppc: dsputil: do unaligned block accesses correctly

The following tests fail due to this:
fate-checkasm
fate-vsynth1-dnxhd-2k-hr-hq fate-vsynth1-dnxhd-edge1-hr
fate-vsynth1-dnxhd-edge2-hr fate-vsynth1-dnxhd-edge3-hr
fate-vsynth1-dnxhd-hr-sq-mov fate-vsynth1-dnxhd-hr-hq-mov
fate-vsynth2-dnxhd-2k-hr-hq fate-vsynth2-dnxhd-edge1-hr
fate-vsynth2-dnxhd-edge2-hr fate-vsynth2-dnxhd-edge3-hr
fate-vsynth2-dnxhd-hr-sq-mov fate-vsynth2-dnxhd-hr-hq-mov
fate-vsynth3-dnxhd-2k-hr-hq fate-vsynth3-dnxhd-edge1-hr
fate-vsynth3-dnxhd-edge2-hr fate-vsynth3-dnxhd-edge3-hr
fate-vsynth3-dnxhd-hr-sq-mov fate-vsynth3-dnxhd-hr-hq-mov

Fixes trac ticket #5508.

Reviewed-by: Carl Eugen Hoyos <ceffmpeg@gmail.com>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
(cherry picked from commit 3932ccc472)
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
This commit is contained in:
Andreas Cadhalpun 2016-11-02 21:28:49 +01:00
parent c5fb9df38a
commit a94f846e2d
1 changed files with 10 additions and 7 deletions
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17
libavcodec/ppc/pixblockdsp.c
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@ -67,10 +67,10 @@ static void get_pixels_altivec(int16_t *restrict block, const uint8_t *pixels,
ptrdiff_t line_size)
{
int i;
vec_u8 perm = vec_lvsl(0, pixels);
const vec_u8 zero = (const vec_u8)vec_splat_u8(0);
for (i = 0; i < 8; i++) {
vec_u8 perm = vec_lvsl(0, pixels);
/* Read potentially unaligned pixels.
* We're reading 16 pixels, and actually only want 8,
* but we simply ignore the extras. */
@ -157,8 +157,7 @@ static void diff_pixels_altivec(int16_t *restrict block, const uint8_t *s1,
const uint8_t *s2, int stride)
{
int i;
vec_u8 perm1 = vec_lvsl(0, s1);
vec_u8 perm2 = vec_lvsl(0, s2);
vec_u8 perm;
const vec_u8 zero = (const vec_u8)vec_splat_u8(0);
vec_s16 shorts1, shorts2;
@ -166,17 +165,19 @@ static void diff_pixels_altivec(int16_t *restrict block, const uint8_t *s1,
/* Read potentially unaligned pixels.
* We're reading 16 pixels, and actually only want 8,
* but we simply ignore the extras. */
perm = vec_lvsl(0, s1);
vec_u8 pixl = vec_ld(0, s1);
vec_u8 pixr = vec_ld(15, s1);
vec_u8 bytes = vec_perm(pixl, pixr, perm1);
vec_u8 bytes = vec_perm(pixl, pixr, perm);
// Convert the bytes into shorts.
shorts1 = (vec_s16)vec_mergeh(zero, bytes);
// Do the same for the second block of pixels.
perm = vec_lvsl(0, s2);
pixl = vec_ld(0, s2);
pixr = vec_ld(15, s2);
bytes = vec_perm(pixl, pixr, perm2);
bytes = vec_perm(pixl, pixr, perm);
// Convert the bytes into shorts.
shorts2 = (vec_s16)vec_mergeh(zero, bytes);
@ -197,17 +198,19 @@ static void diff_pixels_altivec(int16_t *restrict block, const uint8_t *s1,
/* Read potentially unaligned pixels.
* We're reading 16 pixels, and actually only want 8,
* but we simply ignore the extras. */
perm = vec_lvsl(0, s1);
pixl = vec_ld(0, s1);
pixr = vec_ld(15, s1);
bytes = vec_perm(pixl, pixr, perm1);
bytes = vec_perm(pixl, pixr, perm);
// Convert the bytes into shorts.
shorts1 = (vec_s16)vec_mergeh(zero, bytes);
// Do the same for the second block of pixels.
perm = vec_lvsl(0, s2);
pixl = vec_ld(0, s2);
pixr = vec_ld(15, s2);
bytes = vec_perm(pixl, pixr, perm2);
bytes = vec_perm(pixl, pixr, perm);
// Convert the bytes into shorts.
shorts2 = (vec_s16)vec_mergeh(zero, bytes);