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aco/isel: optimize pack_32_2x16_split(undef, const)

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Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Acked-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/39412>
This commit is contained in:
Georg Lehmann 2025-12-13 15:03:32 +01:00 • committed by Marge Bot
parent b2d9615000
commit 830d6de9ff
1 changed files with 6 additions and 2 deletions
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8
src/amd/compiler/instruction_selection/aco_select_nir_alu.cpp
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@ -3139,8 +3139,12 @@ visit_alu_instr(isel_context* ctx, nir_alu_instr* instr)
} else if (nir_src_is_undef(instr->src[1].src)) {
bld.copy(Definition(dst), src0);
} else if (nir_src_is_undef(instr->src[0].src)) {
bld.pseudo(aco_opcode::p_insert, Definition(dst), bld.def(s1, scc), src1, Operand::c32(1),
Operand::c32(16));
if (nir_src_is_const(instr->src[1].src)) {
bld.copy(Definition(dst), Operand::c32(nir_src_as_uint(instr->src[1].src) << 16));
} else {
bld.pseudo(aco_opcode::p_insert, Definition(dst), bld.def(s1, scc), src1,
Operand::c32(1), Operand::c32(16));
}
} else if (ctx->program->gfx_level >= GFX9) {
bld.sop2(aco_opcode::s_pack_ll_b32_b16, Definition(dst), src0, src1);
} else {