llvmpipe: refactor tri_3_16
Keep step array as a set of four m128i's and reuse throughout the rasterization.
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@ -227,6 +227,29 @@ build_mask_linear(int c, int dcdx, int dcdy)
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#define NR_PLANES 8
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#include "lp_rast_tri_tmp.h"
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static INLINE unsigned
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sign_bits4(const __m128i *cstep, int cdiff)
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{
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/* Adjust the step values
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*/
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__m128i cio4 = _mm_set1_epi32(cdiff);
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__m128i cstep0 = _mm_add_epi32(cstep[0], cio4);
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__m128i cstep1 = _mm_add_epi32(cstep[1], cio4);
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__m128i cstep2 = _mm_add_epi32(cstep[2], cio4);
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__m128i cstep3 = _mm_add_epi32(cstep[3], cio4);
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/* Pack down to epi8
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*/
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__m128i cstep01 = _mm_packs_epi32(cstep0, cstep1);
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__m128i cstep23 = _mm_packs_epi32(cstep2, cstep3);
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__m128i result = _mm_packs_epi16(cstep01, cstep23);
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/* Extract the sign bits
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*/
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return _mm_movemask_epi8(result);
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}
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/* Special case for 3 plane triangle which is contained entirely
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* within a 16x16 block.
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@ -238,29 +261,32 @@ lp_rast_triangle_3_16(struct lp_rasterizer_task *task,
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const struct lp_rast_triangle *tri = arg.triangle.tri;
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const struct lp_rast_plane *plane = tri->plane;
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unsigned mask = arg.triangle.plane_mask;
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const int x = task->x + (mask & 0xf) * 16;
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const int y = task->y + (mask >> 4) * 16;
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const int x = task->x + (mask & 0xff);
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const int y = task->y + (mask >> 8);
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unsigned outmask, inmask, partmask, partial_mask;
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unsigned j;
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int c[3];
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__m128i cstep4[3][4];
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outmask = 0; /* outside one or more trivial reject planes */
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partmask = 0; /* outside one or more trivial accept planes */
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for (j = 0; j < 3; j++) {
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c[j] = plane[j].c + plane[j].dcdy * y - plane[j].dcdx * x;
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const int dcdx = -plane[j].dcdx * 4;
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const int dcdy = plane[j].dcdy * 4;
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__m128i xdcdy = _mm_set1_epi32(dcdy);
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cstep4[j][0] = _mm_setr_epi32(0, dcdx, dcdx*2, dcdx*3);
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cstep4[j][1] = _mm_add_epi32(cstep4[j][0], xdcdy);
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cstep4[j][2] = _mm_add_epi32(cstep4[j][1], xdcdy);
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cstep4[j][3] = _mm_add_epi32(cstep4[j][2], xdcdy);
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{
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const int dcdx = -plane[j].dcdx * 4;
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const int dcdy = plane[j].dcdy * 4;
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const int c = plane[j].c + plane[j].dcdy * y - plane[j].dcdx * x;
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const int cox = plane[j].eo * 4;
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const int cio = plane[j].ei * 4 - 1;
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build_masks(c[j] + cox,
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cio - cox,
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dcdx, dcdy,
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&outmask, /* sign bits from c[i][0..15] + cox */
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&partmask); /* sign bits from c[i][0..15] + cio */
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outmask |= sign_bits4(cstep4[j], c + cox);
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partmask |= sign_bits4(cstep4[j], c + cio);
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}
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}
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@ -286,16 +312,20 @@ lp_rast_triangle_3_16(struct lp_rasterizer_task *task,
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int iy = (i >> 2) * 4;
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int px = x + ix;
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int py = y + iy;
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int cx[3];
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unsigned mask = 0xffff;
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partial_mask &= ~(1 << i);
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for (j = 0; j < 3; j++)
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cx[j] = (c[j]
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- plane[j].dcdx * ix
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+ plane[j].dcdy * iy);
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for (j = 0; j < 3; j++) {
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const int cx = (plane[j].c
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- plane[j].dcdx * px
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+ plane[j].dcdy * py) * 4;
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do_block_4_3(task, tri, plane, px, py, cx);
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mask &= ~sign_bits4(cstep4[j], cx);
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}
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if (mask)
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lp_rast_shade_quads_mask(task, &tri->inputs, px, py, mask);
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}
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/* Iterate over fulls:
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