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i965/fs: Match destination type to size for ballot

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No use in taking a 64-bit value when we know the high 32-bits are zero.
This commit is contained in:
Matt Turner
2017-06-30 15:11:15 -07:00
parent 1038d385a9
commit 069bf7c907
2 changed files with 6 additions and 2 deletions
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2
src/intel/compiler/brw_compiler.c
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@@ -58,7 +58,7 @@ static const struct nir_shader_compiler_options scalar_nir_options = {
.lower_unpack_unorm_2x16 = true, .lower_unpack_unorm_2x16 = true,
.lower_unpack_unorm_4x8 = true, .lower_unpack_unorm_4x8 = true,
.lower_subgroup_masks = true, .lower_subgroup_masks = true,
.max_subgroup_size = 64, /* FIXME */ .max_subgroup_size = 32,
.max_unroll_iterations = 32, .max_unroll_iterations = 32,
}; };

4
src/intel/compiler/brw_fs_nir.cpp
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@@ -4189,7 +4189,11 @@ fs_visitor::nir_emit_intrinsic(const fs_builder &bld, nir_intrinsic_instr *instr
bld.exec_all().MOV(flag, brw_imm_ud(0u)); bld.exec_all().MOV(flag, brw_imm_ud(0u));
bld.CMP(bld.null_reg_ud(), value, brw_imm_ud(0u), BRW_CONDITIONAL_NZ); bld.CMP(bld.null_reg_ud(), value, brw_imm_ud(0u), BRW_CONDITIONAL_NZ);
if (instr->dest.ssa.bit_size > 32) {
dest.type = BRW_REGISTER_TYPE_UQ; dest.type = BRW_REGISTER_TYPE_UQ;
} else {
dest.type = BRW_REGISTER_TYPE_UD;
}
bld.MOV(dest, flag); bld.MOV(dest, flag);
break; break;
} }