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aco/optimizer: add extract_float helper

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Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/38150>
This commit is contained in:
Georg Lehmann 2025-10-23 13:09:53 +02:00 • committed by Marge Bot
parent 7eccf5c745
commit 53f5e447db
1 changed files with 15 additions and 5 deletions
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20
src/amd/compiler/aco_optimizer.cpp
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@ -1504,6 +1504,20 @@ alu_opt_info_to_instr(opt_ctx& ctx, alu_opt_info& info, Instruction* old_instr)
return instr; return instr;
} }
double
extract_float(uint64_t raw, unsigned bits, unsigned idx = 0)
{
raw >>= bits * idx;
if (bits == 16)
return _mesa_half_to_float(raw);
else if (bits == 32)
return uif(raw);
else if (bits == 64)
return uid(raw);
else
UNREACHABLE("unsupported float size");
}
uint64_t uint64_t
operand_canonicalized_labels(opt_ctx& ctx, Operand op) operand_canonicalized_labels(opt_ctx& ctx, Operand op)
{ {
@ -2834,11 +2848,7 @@ label_instruction(opt_ctx& ctx, aco_ptr<Instruction>& instr)
if (!instr->operands[!i].isConstant() || !instr->operands[i].isTemp()) if (!instr->operands[!i].isConstant() || !instr->operands[i].isTemp())
continue; continue;
double constant = uif(instr->operands[!i].constantValue()); double constant = extract_float(instr->operands[!i].constantValue64(), bit_size);
if (fp16)
constant = _mesa_half_to_float(instr->operands[!i].constantValue());
else if (fp64)
constant = uid(instr->operands[!i].constantValue64());
if (!instr->isDPP() && !instr->isSDWA() && !instr->valu().opsel && fabs(constant) == 1.0) { if (!instr->isDPP() && !instr->isSDWA() && !instr->valu().opsel && fabs(constant) == 1.0) {
bool neg1 = constant == -1.0; bool neg1 = constant == -1.0;