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