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aco/optimizer: parse pseudo alu instructions

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For combining, it's easier to handle these like their respective alu.

Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/38530>
This commit is contained in:
Georg Lehmann 2025-11-19 13:04:58 +01:00 • committed by Marge Bot
parent 8a1ea724b4
commit 88f7e3fff3
1 changed files with 37 additions and 0 deletions
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37
src/amd/compiler/aco_optimizer.cpp
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@ -1172,6 +1172,43 @@ alu_opt_info_is_valid(opt_ctx& ctx, alu_opt_info& info)
bool
alu_opt_gather_info(opt_ctx& ctx, Instruction* instr, alu_opt_info& info)
{
if (instr->opcode == aco_opcode::p_insert &&
(instr->operands[1].constantValue() + 1) * instr->operands[2].constantValue() == 32) {
info = {};
info.pass_flags = instr->pass_flags;
info.defs.push_back(instr->definitions[0]);
info.operands.push_back({Operand::c32(32 - instr->operands[2].constantValue())});
info.operands.push_back({instr->operands[0]});
if (instr->definitions[0].regClass() == s1) {
info.defs.push_back(instr->definitions[1]);
info.opcode = aco_opcode::v_lshl_b32;
info.format = Format::SOP2;
std::swap(info.operands[0], info.operands[1]);
} else {
info.opcode = aco_opcode::v_lshlrev_b32;
info.format = Format::VOP2;
}
return true;
} else if ((instr->opcode == aco_opcode::p_insert ||
(instr->opcode == aco_opcode::p_extract && instr->operands[3].constantEquals(0))) &&
instr->operands[1].constantEquals(0)) {
info = {};
info.pass_flags = instr->pass_flags;
info.defs.push_back(instr->definitions[0]);
info.operands.push_back(
{Operand::c32(instr->operands[2].constantEquals(8) ? 0xffu : 0xffffu)});
info.operands.push_back({instr->operands[0]});
if (instr->definitions[0].regClass() == s1) {
info.defs.push_back(instr->definitions[1]);
info.opcode = aco_opcode::s_and_b32;
info.format = Format::SOP2;
} else {
info.opcode = aco_opcode::v_and_b32;
info.format = Format::VOP2;
}
return true;
}
if (!instr->isVALU() && !instr->isSALU())
return false;