#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/MC/SubtargetFeature.h"
#include "llvm/Support/Casting.h"
+#include <optional>
using namespace llvm;
const MCRegisterInfo &MRI;
/// Encode an fp or int literal
- uint32_t getLitEncoding(const MCOperand &MO, const MCOperandInfo &OpInfo,
- const MCSubtargetInfo &STI) const;
+ std::optional<uint32_t> getLitEncoding(const MCOperand &MO,
+ const MCOperandInfo &OpInfo,
+ const MCSubtargetInfo &STI) const;
public:
SIMCCodeEmitter(const MCInstrInfo &mcii, MCContext &ctx)
return 255;
}
-uint32_t SIMCCodeEmitter::getLitEncoding(const MCOperand &MO,
- const MCOperandInfo &OpInfo,
- const MCSubtargetInfo &STI) const {
+std::optional<uint32_t>
+SIMCCodeEmitter::getLitEncoding(const MCOperand &MO,
+ const MCOperandInfo &OpInfo,
+ const MCSubtargetInfo &STI) const {
int64_t Imm;
if (MO.isExpr()) {
const auto *C = dyn_cast<MCConstantExpr>(MO.getExpr());
assert(!MO.isDFPImm());
if (!MO.isImm())
- return ~0;
+ return {};
Imm = MO.getImm();
}
// Is this operand a literal immediate?
const MCOperand &Op = MI.getOperand(i);
- if (getLitEncoding(Op, Desc.OpInfo[i], STI) != 255)
+ auto Enc = getLitEncoding(Op, Desc.OpInfo[i], STI);
+ if (!Enc || *Enc != 255)
continue;
// Yes! Encode it
return;
} else {
const MCInstrDesc &Desc = MCII.get(MI.getOpcode());
- uint32_t Enc = getLitEncoding(MO, Desc.OpInfo[OpNo], STI);
- if (Enc != ~0U && Enc != 255) {
- Op = Enc | SDWA9EncValues::SRC_SGPR_MASK;
+ auto Enc = getLitEncoding(MO, Desc.OpInfo[OpNo], STI);
+ if (Enc && *Enc != 255) {
+ Op = *Enc | SDWA9EncValues::SRC_SGPR_MASK;
return;
}
}
const MCInstrDesc &Desc = MCII.get(MI.getOpcode());
if (AMDGPU::isSISrcOperand(Desc, OpNo)) {
- uint32_t Enc = getLitEncoding(MO, Desc.OpInfo[OpNo], STI);
- if (Enc != ~0U) {
- Op = Enc;
+ if (auto Enc = getLitEncoding(MO, Desc.OpInfo[OpNo], STI)) {
+ Op = *Enc;
return;
}
} else if (MO.isImm()) {
v_fmaak_f32 v5, v1, v2, 0xa1b1c1d1
// GFX10: encoding: [0x01,0x05,0x0a,0x5a,0xd1,0xc1,0xb1,0xa1]
+v_fmaak_f32 v5, v1, v2, -1
+// GFX10: encoding: [0x01,0x05,0x0a,0x5a,0xff,0xff,0xff,0xff]
+
v_cvt_pkrtz_f16_f32_e32 v5, v1, v2
// GFX10: encoding: [0x01,0x05,0x0a,0x5e]