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etnaviv: nir: make lower_alu easier to follow

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Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>
This commit is contained in:
Jonathan Marek
2019-09-12 13:51:32 -04:00
parent c4f63be5a6
commit dc3656c9c4
1 changed files with 36 additions and 32 deletions
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68
src/gallium/drivers/etnaviv/etnaviv_compiler_nir_emit.h
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@@ -1239,37 +1239,9 @@ lower_alu(struct state *state, nir_alu_instr *alu)
switch (alu->op) {
case nir_op_vec2:
case nir_op_vec3:
case nir_op_vec4: {
nir_const_value value[4];
unsigned num_components = 0;
for (unsigned i = 0; i < info->num_inputs; i++) {
nir_const_value *cv = nir_src_as_const_value(alu->src[i].src);
if (cv)
value[num_components++] = cv[alu->src[i].swizzle[0]];
}
if (num_components <= 1) /* nothing to do */
break;
nir_ssa_def *def = nir_build_imm(&b, num_components, 32, value);
if (num_components == info->num_inputs) {
nir_ssa_def_rewrite_uses(&alu->dest.dest.ssa, nir_src_for_ssa(def));
nir_instr_remove(&alu->instr);
return;
}
for (unsigned i = 0, j = 0; i < info->num_inputs; i++) {
nir_const_value *cv = nir_src_as_const_value(alu->src[i].src);
if (!cv)
continue;
nir_instr_rewrite_src(&alu->instr, &alu->src[i].src, nir_src_for_ssa(def));
alu->src[i].swizzle[0] = j++;
}
} break;
default: {
case nir_op_vec4:
break;
default:
/* pre-GC7000L can only have 1 uniform src per instruction */
if (state->c->specs->halti >= 5)
return;
@@ -1327,7 +1299,39 @@ lower_alu(struct state *state, nir_alu_instr *alu)
nir_ssa_def *mov = nir_mov(&b, alu->src[i].src.ssa);
nir_instr_rewrite_src(&alu->instr, &alu->src[i].src, nir_src_for_ssa(mov));
}
} return;
return;
}
nir_const_value value[4];
unsigned num_components = 0;
for (unsigned i = 0; i < info->num_inputs; i++) {
nir_const_value *cv = nir_src_as_const_value(alu->src[i].src);
if (cv)
value[num_components++] = cv[alu->src[i].swizzle[0]];
}
/* if there is more than one constant source to the vecN, combine them
* into a single load_const (removing the vecN completely if all components
* are constant)
*/
if (num_components > 1) {
nir_ssa_def *def = nir_build_imm(&b, num_components, 32, value);
if (num_components == info->num_inputs) {
nir_ssa_def_rewrite_uses(&alu->dest.dest.ssa, nir_src_for_ssa(def));
nir_instr_remove(&alu->instr);
return;
}
for (unsigned i = 0, j = 0; i < info->num_inputs; i++) {
nir_const_value *cv = nir_src_as_const_value(alu->src[i].src);
if (!cv)
continue;
nir_instr_rewrite_src(&alu->instr, &alu->src[i].src, nir_src_for_ssa(def));
alu->src[i].swizzle[0] = j++;
}
}
unsigned finished_write_mask = 0;