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//===-- LanaiAluCode.h - ALU operator encoding ----------------------------===//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// The encoding for ALU operators used in RM and RRM operands
#include "llvm/ADT/StringSwitch.h"
#include "llvm/CodeGen/ISDOpcodes.h"
#include "llvm/Support/ErrorHandling.h"
namespace llvm {
namespace LPAC {
enum AluCode {
ADD = 0x00,
ADDC = 0x01,
SUB = 0x02,
SUBB = 0x03,
AND = 0x04,
OR = 0x05,
XOR = 0x06,
SPECIAL = 0x07,
// Shift instructions are treated as SPECIAL when encoding the machine
// instruction, but kept distinct until lowering. The constant values are
// chosen to ease lowering.
SHL = 0x17,
SRL = 0x27,
SRA = 0x37,
// Indicates an unknown/unsupported operator
// Bits indicating post- and pre-operators should be tested and set using Is*
// and Make* utility functions
const int Lanai_PRE_OP = 0x40;
const int Lanai_POST_OP = 0x80;
inline static unsigned encodeLanaiAluCode(unsigned AluOp) {
unsigned const OP_ENCODING_MASK = 0x07;
return AluOp & OP_ENCODING_MASK;
inline static unsigned getAluOp(unsigned AluOp) {
unsigned const ALU_MASK = 0x3F;
return AluOp & ALU_MASK;
inline static bool isPreOp(unsigned AluOp) { return AluOp & Lanai_PRE_OP; }
inline static bool isPostOp(unsigned AluOp) { return AluOp & Lanai_POST_OP; }
inline static unsigned makePreOp(unsigned AluOp) {
assert(!isPostOp(AluOp) && "Operator can't be a post- and pre-op");
return AluOp | Lanai_PRE_OP;
inline static unsigned makePostOp(unsigned AluOp) {
assert(!isPreOp(AluOp) && "Operator can't be a post- and pre-op");
return AluOp | Lanai_POST_OP;
inline static bool modifiesOp(unsigned AluOp) {
return isPreOp(AluOp) | isPostOp(AluOp);
inline static const char *lanaiAluCodeToString(unsigned AluOp) {
switch (getAluOp(AluOp)) {
case ADD:
return "add";
case ADDC:
return "addc";
case SUB:
return "sub";
case SUBB:
return "subb";
case AND:
return "and";
case OR:
return "or";
case XOR:
return "xor";
case SHL:
return "sh";
case SRL:
return "sh";
case SRA:
return "sha";
llvm_unreachable("Invalid ALU code.");
inline static AluCode stringToLanaiAluCode(StringRef S) {
return StringSwitch<AluCode>(S)
.Case("add", ADD)
.Case("addc", ADDC)
.Case("sub", SUB)
.Case("subb", SUBB)
.Case("and", AND)
.Case("or", OR)
.Case("xor", XOR)
.Case("sh", SHL)
.Case("srl", SRL)
.Case("sha", SRA)
inline static AluCode isdToLanaiAluCode(ISD::NodeType Node_type) {
switch (Node_type) {
case ISD::ADD:
return AluCode::ADD;
case ISD::ADDE:
return AluCode::ADDC;
case ISD::SUB:
return AluCode::SUB;
case ISD::SUBE:
return AluCode::SUBB;
case ISD::AND:
return AluCode::AND;
case ISD::OR:
return AluCode::OR;
case ISD::XOR:
return AluCode::XOR;
case ISD::SHL:
return AluCode::SHL;
case ISD::SRL:
return AluCode::SRL;
case ISD::SRA:
return AluCode::SRA;
return AluCode::UNKNOWN;
} // namespace LPAC
} // namespace llvm