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nir/lower_point_size: assume scalar PSIZ 

Reviewed-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Iago Toral Quiroga 2019-09-04 11:04:13 +02:00 committed by Iago Toral
parent 7f0b4a803c
commit 544b156968
1 changed files with 3 additions and 14 deletions
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17
src/compiler/nir/nir_lower_point_size.c
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@ -41,12 +41,9 @@ lower_point_size_instr(nir_builder *b, nir_instr *psiz_instr,
nir_intrinsic_instr *instr = nir_instr_as_intrinsic(psiz_instr);
/* Some fixed function vertex programs generate PSIZ as a vec4
* instead of a scalar, where the actual point size is stored in the
* first component.
*/
assert(instr->src[1].is_ssa);
nir_ssa_def *psiz = nir_channel(b, instr->src[1].ssa, 0);
assert(instr->src[1].ssa->num_components == 1);
nir_ssa_def *psiz = instr->src[1].ssa;
if (min > 0.0f)
psiz = nir_fmax(b, psiz, nir_imm_float(b, min));
@ -54,15 +51,7 @@ lower_point_size_instr(nir_builder *b, nir_instr *psiz_instr,
if (max > 0.0f)
psiz = nir_fmin(b, psiz, nir_imm_float(b, max));
nir_ssa_def *src_chans[4];
src_chans[0] = psiz;
for (int i = 1; i < instr->src[1].ssa->num_components; i++)
src_chans[i] = nir_channel(b, instr->src[1].ssa, i);
nir_ssa_def *lowered_src =
nir_vec(b, src_chans, instr->src[1].ssa->num_components);
nir_instr_rewrite_src(&instr->instr, &instr->src[1],
nir_src_for_ssa(lowered_src));
nir_instr_rewrite_src(&instr->instr, &instr->src[1], nir_src_for_ssa(psiz));
}
static bool