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ppc: dsputil: do unaligned block accesses correctly
To load unaligned vector data in the usual way, explicit vec_ld() should be used rather than dereferencing a pointer to a vector type. When the VSX extension is enabled, gcc may compile vector pointer dereferences using the VSX lxvw4x instruction instead of the lvx instruction typically used with Altivec/VMX. As the behaviour of these instructions with unaligned addresses differs, it is important that only lvx is used here. Signed-off-by: Mans Rullgard <mans@mansr.com>
This commit is contained in:
Mans Rullgard
parent
c75eca9d37
commit
4c387c7070
@ -34,7 +34,9 @@ static int sad16_x2_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size
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int i;
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int s;
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const vector unsigned char zero = (const vector unsigned char)vec_splat_u8(0);
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vector unsigned char *tv;
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vector unsigned char perm1 = vec_lvsl(0, pix2);
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vector unsigned char perm2 = vec_add(perm1, vec_splat_u8(1));
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vector unsigned char pix2l, pix2r;
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vector unsigned char pix1v, pix2v, pix2iv, avgv, t5;
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vector unsigned int sad;
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vector signed int sumdiffs;
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@ -45,14 +47,11 @@ static int sad16_x2_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size
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/* Read unaligned pixels into our vectors. The vectors are as follows:
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pix1v: pix1[0]-pix1[15]
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pix2v: pix2[0]-pix2[15] pix2iv: pix2[1]-pix2[16] */
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tv = (vector unsigned char *) pix1;
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pix1v = vec_perm(tv[0], tv[1], vec_lvsl(0, pix1));
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tv = (vector unsigned char *) &pix2[0];
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pix2v = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix2[0]));
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tv = (vector unsigned char *) &pix2[1];
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pix2iv = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix2[1]));
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pix1v = vec_ld( 0, pix1);
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pix2l = vec_ld( 0, pix2);
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pix2r = vec_ld(16, pix2);
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pix2v = vec_perm(pix2l, pix2r, perm1);
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pix2iv = vec_perm(pix2l, pix2r, perm2);
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/* Calculate the average vector */
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avgv = vec_avg(pix2v, pix2iv);
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@ -79,7 +78,8 @@ static int sad16_y2_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size
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int i;
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int s;
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const vector unsigned char zero = (const vector unsigned char)vec_splat_u8(0);
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vector unsigned char *tv;
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vector unsigned char perm = vec_lvsl(0, pix2);
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vector unsigned char pix2l, pix2r;
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vector unsigned char pix1v, pix2v, pix3v, avgv, t5;
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vector unsigned int sad;
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vector signed int sumdiffs;
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@ -95,18 +95,19 @@ static int sad16_y2_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size
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Read unaligned pixels into our vectors. The vectors are as follows:
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pix2v: pix2[0]-pix2[15]
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Split the pixel vectors into shorts */
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tv = (vector unsigned char *) &pix2[0];
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pix2v = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix2[0]));
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pix2l = vec_ld( 0, pix2);
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pix2r = vec_ld(15, pix2);
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pix2v = vec_perm(pix2l, pix2r, perm);
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for (i = 0; i < h; i++) {
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/* Read unaligned pixels into our vectors. The vectors are as follows:
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pix1v: pix1[0]-pix1[15]
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pix3v: pix3[0]-pix3[15] */
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tv = (vector unsigned char *) pix1;
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pix1v = vec_perm(tv[0], tv[1], vec_lvsl(0, pix1));
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pix1v = vec_ld(0, pix1);
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tv = (vector unsigned char *) &pix3[0];
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pix3v = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix3[0]));
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pix2l = vec_ld( 0, pix3);
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pix2r = vec_ld(15, pix3);
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pix3v = vec_perm(pix2l, pix2r, perm);
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/* Calculate the average vector */
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avgv = vec_avg(pix2v, pix3v);
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@ -137,7 +138,10 @@ static int sad16_xy2_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_siz
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uint8_t *pix3 = pix2 + line_size;
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const vector unsigned char zero = (const vector unsigned char)vec_splat_u8(0);
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const vector unsigned short two = (const vector unsigned short)vec_splat_u16(2);
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vector unsigned char *tv, avgv, t5;
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vector unsigned char avgv, t5;
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vector unsigned char perm1 = vec_lvsl(0, pix2);
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vector unsigned char perm2 = vec_add(perm1, vec_splat_u8(1));
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vector unsigned char pix2l, pix2r;
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vector unsigned char pix1v, pix2v, pix3v, pix2iv, pix3iv;
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vector unsigned short pix2lv, pix2hv, pix2ilv, pix2ihv;
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vector unsigned short pix3lv, pix3hv, pix3ilv, pix3ihv;
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@ -157,11 +161,10 @@ static int sad16_xy2_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_siz
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Read unaligned pixels into our vectors. The vectors are as follows:
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pix2v: pix2[0]-pix2[15] pix2iv: pix2[1]-pix2[16]
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Split the pixel vectors into shorts */
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tv = (vector unsigned char *) &pix2[0];
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pix2v = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix2[0]));
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tv = (vector unsigned char *) &pix2[1];
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pix2iv = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix2[1]));
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pix2l = vec_ld( 0, pix2);
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pix2r = vec_ld(16, pix2);
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pix2v = vec_perm(pix2l, pix2r, perm1);
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pix2iv = vec_perm(pix2l, pix2r, perm2);
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pix2hv = (vector unsigned short) vec_mergeh(zero, pix2v);
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pix2lv = (vector unsigned short) vec_mergel(zero, pix2v);
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@ -174,14 +177,12 @@ static int sad16_xy2_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_siz
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/* Read unaligned pixels into our vectors. The vectors are as follows:
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pix1v: pix1[0]-pix1[15]
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pix3v: pix3[0]-pix3[15] pix3iv: pix3[1]-pix3[16] */
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tv = (vector unsigned char *) pix1;
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pix1v = vec_perm(tv[0], tv[1], vec_lvsl(0, pix1));
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pix1v = vec_ld(0, pix1);
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tv = (vector unsigned char *) &pix3[0];
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pix3v = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix3[0]));
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tv = (vector unsigned char *) &pix3[1];
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pix3iv = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix3[1]));
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pix2l = vec_ld( 0, pix3);
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pix2r = vec_ld(16, pix3);
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pix3v = vec_perm(pix2l, pix2r, perm1);
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pix3iv = vec_perm(pix2l, pix2r, perm2);
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/* Note that AltiVec does have vec_avg, but this works on vector pairs
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and rounds up. We could do avg(avg(a,b),avg(c,d)), but the rounding
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@ -230,7 +231,7 @@ 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_low, pix1v_high, pix2v_low, pix2v_high;
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vector unsigned char perm = vec_lvsl(0, pix2);
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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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@ -240,14 +241,10 @@ 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_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_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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vector unsigned char pix2l = vec_ld( 0, pix2);
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vector unsigned char pix2r = vec_ld(15, pix2);
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t1 = vec_ld(0, pix1);
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t2 = vec_perm(pix2l, pix2r, perm);
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/* Calculate a sum of abs differences vector */
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t3 = vec_max(t1, t2);
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@ -274,25 +271,25 @@ static int sad8_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, in
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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, permclear, *pix1v, *pix2v;
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const vector unsigned char permclear = (vector unsigned char){255,255,255,255,255,255,255,255,0,0,0,0,0,0,0,0};
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vector unsigned char perm1 = vec_lvsl(0, pix1);
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vector unsigned char perm2 = vec_lvsl(0, pix2);
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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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sad = (vector unsigned int)vec_splat_u32(0);
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permclear = (vector unsigned char){255,255,255,255,255,255,255,255,0,0,0,0,0,0,0,0};
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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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Since we're reading 16 pixels, and actually only want 8,
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mask out the last 8 pixels. The 0s don't change the sum. */
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perm1 = vec_lvsl(0, pix1);
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pix1v = (vector unsigned char *) 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_and(vec_perm(pix1v[0], pix1v[1], perm1), permclear);
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t2 = vec_and(vec_perm(pix2v[0], pix2v[1], perm2), permclear);
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vector unsigned char pix1l = vec_ld( 0, pix1);
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vector unsigned char pix1r = vec_ld(15, pix1);
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vector unsigned char pix2l = vec_ld( 0, pix2);
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vector unsigned char pix2r = vec_ld(15, pix2);
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t1 = vec_and(vec_perm(pix1l, pix1r, perm1), permclear);
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t2 = vec_and(vec_perm(pix2l, pix2r, perm2), permclear);
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/* Calculate a sum of abs differences vector */
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t3 = vec_max(t1, t2);
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@ -319,7 +316,7 @@ static int pix_norm1_altivec(uint8_t *pix, int line_size)
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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 *tv;
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vector unsigned char perm = vec_lvsl(0, pix);
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vector unsigned char pixv;
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vector unsigned int sv;
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vector signed int sum;
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@ -329,8 +326,9 @@ static int pix_norm1_altivec(uint8_t *pix, int line_size)
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s = 0;
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for (i = 0; i < 16; i++) {
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/* Read in the potentially unaligned pixels */
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tv = (vector unsigned char *) pix;
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pixv = vec_perm(tv[0], tv[1], vec_lvsl(0, pix));
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vector unsigned char pixl = vec_ld( 0, pix);
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vector unsigned char pixr = vec_ld(15, pix);
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pixv = vec_perm(pixl, pixr, perm);
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/* Square the values, and add them to our sum */
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sv = vec_msum(pixv, pixv, sv);
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@ -355,26 +353,25 @@ static int sse8_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, in
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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, permclear, *pix1v, *pix2v;
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const vector unsigned char permclear = (vector unsigned char){255,255,255,255,255,255,255,255,0,0,0,0,0,0,0,0};
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vector unsigned char perm1 = vec_lvsl(0, pix1);
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vector unsigned char perm2 = vec_lvsl(0, pix2);
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vector unsigned char t1, t2, t3,t4, t5;
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vector unsigned int sum;
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vector signed int sumsqr;
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sum = (vector unsigned int)vec_splat_u32(0);
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permclear = (vector unsigned char){255,255,255,255,255,255,255,255,0,0,0,0,0,0,0,0};
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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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Since we're reading 16 pixels, and actually only want 8,
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mask out the last 8 pixels. The 0s don't change the sum. */
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perm1 = vec_lvsl(0, pix1);
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pix1v = (vector unsigned char *) 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_and(vec_perm(pix1v[0], pix1v[1], perm1), permclear);
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t2 = vec_and(vec_perm(pix2v[0], pix2v[1], perm2), permclear);
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vector unsigned char pix1l = vec_ld( 0, pix1);
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vector unsigned char pix1r = vec_ld(15, pix1);
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vector unsigned char pix2l = vec_ld( 0, pix2);
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vector unsigned char pix2r = vec_ld(15, pix2);
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t1 = vec_and(vec_perm(pix1l, pix1r, perm1), permclear);
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t2 = vec_and(vec_perm(pix2l, pix2r, perm2), permclear);
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/* Since we want to use unsigned chars, we can take advantage
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of the fact that abs(a-b)^2 = (a-b)^2. */
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@ -409,7 +406,7 @@ static int sse16_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 perm = vec_lvsl(0, pix2);
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vector unsigned char t1, t2, t3,t4, t5;
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vector unsigned int sum;
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vector signed int sumsqr;
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@ -418,12 +415,10 @@ static int sse16_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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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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vector unsigned char pix2l = vec_ld( 0, pix2);
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vector unsigned char pix2r = vec_ld(15, pix2);
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t1 = vec_ld(0, pix1);
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t2 = vec_perm(pix2l, pix2r, perm);
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/* Since we want to use unsigned chars, we can take advantage
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of the fact that abs(a-b)^2 = (a-b)^2. */
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@ -451,7 +446,7 @@ static int sse16_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, i
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static int pix_sum_altivec(uint8_t * pix, int line_size)
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{
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const vector unsigned int zero = (const vector unsigned int)vec_splat_u32(0);
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vector unsigned char perm, *pixv;
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vector unsigned char perm = vec_lvsl(0, pix);
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vector unsigned char t1;
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vector unsigned int sad;
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vector signed int sumdiffs;
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@ -463,9 +458,9 @@ static int pix_sum_altivec(uint8_t * pix, int line_size)
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for (i = 0; i < 16; i++) {
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/* Read the potentially unaligned 16 pixels into t1 */
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perm = vec_lvsl(0, pix);
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pixv = (vector unsigned char *) pix;
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t1 = vec_perm(pixv[0], pixv[1], perm);
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vector unsigned char pixl = vec_ld( 0, pix);
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vector unsigned char pixr = vec_ld(15, pix);
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t1 = vec_perm(pixl, pixr, perm);
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/* Add each 4 pixel group together and put 4 results into sad */
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sad = vec_sum4s(t1, sad);
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@ -484,7 +479,8 @@ static int pix_sum_altivec(uint8_t * pix, int line_size)
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static void get_pixels_altivec(DCTELEM *restrict block, const uint8_t *pixels, int line_size)
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{
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int i;
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vector unsigned char perm, bytes, *pixv;
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vector unsigned char perm = vec_lvsl(0, pixels);
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vector unsigned char bytes;
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const vector unsigned char zero = (const vector unsigned char)vec_splat_u8(0);
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vector signed short shorts;
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@ -492,9 +488,9 @@ static void get_pixels_altivec(DCTELEM *restrict block, const uint8_t *pixels, i
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// Read potentially unaligned pixels.
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// We're reading 16 pixels, and actually only want 8,
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// but we simply ignore the extras.
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perm = vec_lvsl(0, pixels);
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pixv = (vector unsigned char *) pixels;
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bytes = vec_perm(pixv[0], pixv[1], perm);
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vector unsigned char pixl = vec_ld( 0, pixels);
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vector unsigned char pixr = vec_ld(15, pixels);
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bytes = vec_perm(pixl, pixr, perm);
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// convert the bytes into shorts
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shorts = (vector signed short)vec_mergeh(zero, bytes);
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@ -510,7 +506,9 @@ static void diff_pixels_altivec(DCTELEM *restrict block, const uint8_t *s1,
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const uint8_t *s2, int stride)
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{
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int i;
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vector unsigned char perm, bytes, *pixv;
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vector unsigned char perm1 = vec_lvsl(0, s1);
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vector unsigned char perm2 = vec_lvsl(0, s2);
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vector unsigned char bytes, pixl, pixr;
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const vector unsigned char zero = (const vector unsigned char)vec_splat_u8(0);
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vector signed short shorts1, shorts2;
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@ -518,17 +516,17 @@ static void diff_pixels_altivec(DCTELEM *restrict block, const uint8_t *s1,
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// Read potentially unaligned pixels
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// We're reading 16 pixels, and actually only want 8,
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// but we simply ignore the extras.
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perm = vec_lvsl(0, s1);
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pixv = (vector unsigned char *) s1;
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bytes = vec_perm(pixv[0], pixv[1], perm);
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pixl = vec_ld( 0, s1);
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pixr = vec_ld(15, s1);
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bytes = vec_perm(pixl, pixr, perm1);
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// convert the bytes into shorts
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shorts1 = (vector signed short)vec_mergeh(zero, bytes);
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// Do the same for the second block of pixels
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perm = vec_lvsl(0, s2);
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pixv = (vector unsigned char *) s2;
|
||||
bytes = vec_perm(pixv[0], pixv[1], perm);
|
||||
pixl = vec_ld( 0, s2);
|
||||
pixr = vec_ld(15, s2);
|
||||
bytes = vec_perm(pixl, pixr, perm2);
|
||||
|
||||
// convert the bytes into shorts
|
||||
shorts2 = (vector signed short)vec_mergeh(zero, bytes);
|
||||
@ -550,17 +548,17 @@ static void diff_pixels_altivec(DCTELEM *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);
|
||||
pixv = (vector unsigned char *) s1;
|
||||
bytes = vec_perm(pixv[0], pixv[1], perm);
|
||||
pixl = vec_ld( 0, s1);
|
||||
pixr = vec_ld(15, s1);
|
||||
bytes = vec_perm(pixl, pixr, perm1);
|
||||
|
||||
// convert the bytes into shorts
|
||||
shorts1 = (vector signed short)vec_mergeh(zero, bytes);
|
||||
|
||||
// Do the same for the second block of pixels
|
||||
perm = vec_lvsl(0, s2);
|
||||
pixv = (vector unsigned char *) s2;
|
||||
bytes = vec_perm(pixv[0], pixv[1], perm);
|
||||
pixl = vec_ld( 0, s2);
|
||||
pixr = vec_ld(15, s2);
|
||||
bytes = vec_perm(pixl, pixr, perm2);
|
||||
|
||||
// convert the bytes into shorts
|
||||
shorts2 = (vector signed short)vec_mergeh(zero, bytes);
|
||||
|
||||
@ -114,31 +114,31 @@ static int32_t scalarproduct_and_madd_int16_altivec(int16_t *v1, const int16_t *
|
||||
{
|
||||
LOAD_ZERO;
|
||||
vec_s16 *pv1 = (vec_s16*)v1;
|
||||
vec_s16 *pv2 = (vec_s16*)v2;
|
||||
vec_s16 *pv3 = (vec_s16*)v3;
|
||||
register vec_s16 muls = {mul,mul,mul,mul,mul,mul,mul,mul};
|
||||
register vec_s16 t0, t1, i0, i1;
|
||||
register vec_s16 i2 = pv2[0], i3 = pv3[0];
|
||||
register vec_s16 t0, t1, i0, i1, i4;
|
||||
register vec_s16 i2 = vec_ld(0, v2), i3 = vec_ld(0, v3);
|
||||
register vec_s32 res = zero_s32v;
|
||||
register vec_u8 align = vec_lvsl(0, v2);
|
||||
int32_t ires;
|
||||
order >>= 4;
|
||||
do {
|
||||
t0 = vec_perm(i2, pv2[1], align);
|
||||
i2 = pv2[2];
|
||||
t1 = vec_perm(pv2[1], i2, align);
|
||||
i1 = vec_ld(16, v2);
|
||||
t0 = vec_perm(i2, i1, align);
|
||||
i2 = vec_ld(32, v2);
|
||||
t1 = vec_perm(i1, i2, align);
|
||||
i0 = pv1[0];
|
||||
i1 = pv1[1];
|
||||
res = vec_msum(t0, i0, res);
|
||||
res = vec_msum(t1, i1, res);
|
||||
t0 = vec_perm(i3, pv3[1], align);
|
||||
i3 = pv3[2];
|
||||
t1 = vec_perm(pv3[1], i3, align);
|
||||
i4 = vec_ld(16, v3);
|
||||
t0 = vec_perm(i3, i4, align);
|
||||
i3 = vec_ld(32, v3);
|
||||
t1 = vec_perm(i4, i3, align);
|
||||
pv1[0] = vec_mladd(t0, muls, i0);
|
||||
pv1[1] = vec_mladd(t1, muls, i1);
|
||||
pv1 += 2;
|
||||
pv2 += 2;
|
||||
pv3 += 2;
|
||||
v2 += 8;
|
||||
v3 += 8;
|
||||
} while(--order);
|
||||
res = vec_splat(vec_sums(res, zero_s32v), 3);
|
||||
vec_ste(res, 0, &ires);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user