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ac/nir: only canonicalize 32-bit float min/max outputs on pre-GFX9

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According to LLVM, only pre-GFX9 targets do not flush denorms
for fmin/fmax.

All dEQP-VK.glsl.builtin.precision.* still pass.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
This commit is contained in:
Samuel Pitoiset 2018-01-24 12:31:40 +01:00
parent c8949e2498
commit b9e2f78d6e
1 changed files with 8 additions and 2 deletions
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10
src/amd/common/ac_nir_to_llvm.c
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@ -1913,18 +1913,24 @@ static void visit_alu(struct ac_nir_context *ctx, const nir_alu_instr *instr)
case nir_op_fmax:
result = emit_intrin_2f_param(&ctx->ac, "llvm.maxnum",
ac_to_float_type(&ctx->ac, def_type), src[0], src[1]);
if (instr->dest.dest.ssa.bit_size == 32)
if (ctx->ac.chip_class < GFX9 &&
instr->dest.dest.ssa.bit_size == 32) {
/* Only pre-GFX9 chips do not flush denorms. */
result = emit_intrin_1f_param(&ctx->ac, "llvm.canonicalize",
ac_to_float_type(&ctx->ac, def_type),
result);
}
break;
case nir_op_fmin:
result = emit_intrin_2f_param(&ctx->ac, "llvm.minnum",
ac_to_float_type(&ctx->ac, def_type), src[0], src[1]);
if (instr->dest.dest.ssa.bit_size == 32)
if (ctx->ac.chip_class < GFX9 &&
instr->dest.dest.ssa.bit_size == 32) {
/* Only pre-GFX9 chips do not flush denorms. */
result = emit_intrin_1f_param(&ctx->ac, "llvm.canonicalize",
ac_to_float_type(&ctx->ac, def_type),
result);
}
break;
case nir_op_ffma:
result = emit_intrin_3f_param(&ctx->ac, "llvm.fmuladd",