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Fix overread in altivec DSP function sad16
Signed-off-by: Mans Rullgard <mans@mansr.com>
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@ -230,7 +230,7 @@ static int sad16_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, i
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int i;
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int s;
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const vector unsigned int zero = (const vector unsigned int)vec_splat_u32(0);
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vector unsigned char perm1, perm2, *pix1v, *pix2v;
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vector unsigned char perm1, perm2, pix1v_low, pix1v_high, pix2v_low, pix2v_high;
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vector unsigned char t1, t2, t3,t4, t5;
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vector unsigned int sad;
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vector signed int sumdiffs;
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@ -241,11 +241,13 @@ static int sad16_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, i
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for (i = 0; i < h; i++) {
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/* Read potentially unaligned pixels into t1 and t2 */
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perm1 = vec_lvsl(0, pix1);
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pix1v = (vector unsigned char *) pix1;
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pix1v_high = vec_ld( 0, pix1);
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pix1v_low = vec_ld(15, pix1);
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perm2 = vec_lvsl(0, pix2);
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pix2v = (vector unsigned char *) pix2;
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t1 = vec_perm(pix1v[0], pix1v[1], perm1);
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t2 = vec_perm(pix2v[0], pix2v[1], perm2);
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pix2v_high = vec_ld( 0, pix2);
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pix2v_low = vec_ld(15, pix2);
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t1 = vec_perm(pix1v_high, pix1v_low, perm1);
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t2 = vec_perm(pix2v_high, pix2v_low, perm2);
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/* Calculate a sum of abs differences vector */
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t3 = vec_max(t1, t2);
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