static void
vs_lower_opcode_tgsi_sampling(struct vs_compile_context *vcc,
struct toy_inst *inst)
{
struct toy_compiler *tc = &vcc->tc;
struct toy_src desc;
struct toy_dst dst, tmp;
unsigned sampler_index;
int swizzles[4], i;
unsigned swizzle_zero_mask, swizzle_one_mask, swizzle_normal_mask;
bool need_filter;
desc = vs_prepare_tgsi_sampling(vcc, inst,
vcc->first_free_mrf, &sampler_index);
switch (inst->opcode) {
case TOY_OPCODE_TGSI_TXF:
case TOY_OPCODE_TGSI_TXQ:
case TOY_OPCODE_TGSI_TXQ_LZ:
need_filter = false;
break;
default:
need_filter = true;
break;
}
toy_compiler_lower_to_send(tc, inst, false, GEN6_SFID_SAMPLER);
inst->src[0] = tsrc(TOY_FILE_MRF, vcc->first_free_mrf, 0);
inst->src[1] = desc;
/* write to a temp first */
tmp = tc_alloc_tmp(tc);
tmp.type = inst->dst.type;
dst = inst->dst;
inst->dst = tmp;
tc_move_inst(tc, inst);
if (need_filter) {
assert(sampler_index < vcc->variant->num_sampler_views);
swizzles[0] = vcc->variant->sampler_view_swizzles[sampler_index].r;
swizzles[1] = vcc->variant->sampler_view_swizzles[sampler_index].g;
swizzles[2] = vcc->variant->sampler_view_swizzles[sampler_index].b;
swizzles[3] = vcc->variant->sampler_view_swizzles[sampler_index].a;
}
else {
swizzles[0] = PIPE_SWIZZLE_RED;
swizzles[1] = PIPE_SWIZZLE_GREEN;
swizzles[2] = PIPE_SWIZZLE_BLUE;
swizzles[3] = PIPE_SWIZZLE_ALPHA;
}
swizzle_zero_mask = 0;
swizzle_one_mask = 0;
swizzle_normal_mask = 0;
for (i = 0; i < 4; i++) {
switch (swizzles[i]) {
case PIPE_SWIZZLE_ZERO:
swizzle_zero_mask |= 1 << i;
swizzles[i] = i;
break;
case PIPE_SWIZZLE_ONE:
swizzle_one_mask |= 1 << i;
swizzles[i] = i;
break;
default:
swizzle_normal_mask |= 1 << i;
break;
}
}
/* swizzle the results */
if (swizzle_normal_mask) {
tc_MOV(tc, tdst_writemask(dst, swizzle_normal_mask),
tsrc_swizzle(tsrc_from(tmp), swizzles[0],
swizzles[1], swizzles[2], swizzles[3]));
}
if (swizzle_zero_mask)
tc_MOV(tc, tdst_writemask(dst, swizzle_zero_mask), tsrc_imm_f(0.0f));
if (swizzle_one_mask)
tc_MOV(tc, tdst_writemask(dst, swizzle_one_mask), tsrc_imm_f(1.0f));
}
static void
fs_lower_opcode_tgsi_sampling(struct fs_compile_context *fcc,
struct toy_inst *inst)
{
struct toy_compiler *tc = &fcc->tc;
struct toy_dst dst[4], tmp[4];
struct toy_src desc;
unsigned sampler_index;
int swizzles[4], i;
bool need_filter;
desc = fs_prepare_tgsi_sampling(tc, inst,
fcc->first_free_mrf,
fcc->variant->saturate_tex_coords,
&sampler_index);
switch (inst->opcode) {
case TOY_OPCODE_TGSI_TXF:
case TOY_OPCODE_TGSI_TXQ:
case TOY_OPCODE_TGSI_TXQ_LZ:
need_filter = false;
break;
default:
need_filter = true;
break;
}
toy_compiler_lower_to_send(tc, inst, false, BRW_SFID_SAMPLER);
inst->src[0] = tsrc(TOY_FILE_MRF, fcc->first_free_mrf, 0);
inst->src[1] = desc;
for (i = 2; i < Elements(inst->src); i++)
inst->src[i] = tsrc_null();
/* write to temps first */
tc_alloc_tmp4(tc, tmp);
tdst_transpose(inst->dst, dst);
inst->dst = tmp[0];
tc_move_inst(tc, inst);
if (need_filter) {
assert(sampler_index < fcc->variant->num_sampler_views);
swizzles[0] = fcc->variant->sampler_view_swizzles[sampler_index].r;
swizzles[1] = fcc->variant->sampler_view_swizzles[sampler_index].g;
swizzles[2] = fcc->variant->sampler_view_swizzles[sampler_index].b;
swizzles[3] = fcc->variant->sampler_view_swizzles[sampler_index].a;
}
else {
swizzles[0] = PIPE_SWIZZLE_RED;
swizzles[1] = PIPE_SWIZZLE_GREEN;
swizzles[2] = PIPE_SWIZZLE_BLUE;
swizzles[3] = PIPE_SWIZZLE_ALPHA;
}
/* swizzle the results */
for (i = 0; i < 4; i++) {
switch (swizzles[i]) {
case PIPE_SWIZZLE_ZERO:
tc_MOV(tc, dst[i], tsrc_imm_f(0.0f));
break;
case PIPE_SWIZZLE_ONE:
tc_MOV(tc, dst[i], tsrc_imm_f(1.0f));
break;
default:
tc_MOV(tc, dst[i], tsrc_from(tmp[swizzles[i]]));
break;
}
}
}
