mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-21 16:31:16 +00:00
7ac1609a3b
been MC-ized for assembly printing. MSP430 is mostly so, but still has the asm printer and lowering code in the printer subdir for the moment. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115360 91177308-0d34-0410-b5e6-96231b3b80d8
128 lines
4.0 KiB
C++
128 lines
4.0 KiB
C++
//===-- X86ATTInstPrinter.cpp - AT&T assembly instruction printing --------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file includes code for rendering MCInst instances as AT&T-style
|
|
// assembly.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#define DEBUG_TYPE "asm-printer"
|
|
#include "X86ATTInstPrinter.h"
|
|
#include "X86InstComments.h"
|
|
#include "llvm/MC/MCInst.h"
|
|
#include "llvm/MC/MCAsmInfo.h"
|
|
#include "llvm/MC/MCExpr.h"
|
|
#include "llvm/Support/ErrorHandling.h"
|
|
#include "llvm/Support/Format.h"
|
|
#include "llvm/Support/FormattedStream.h"
|
|
#include "X86GenInstrNames.inc"
|
|
using namespace llvm;
|
|
|
|
// Include the auto-generated portion of the assembly writer.
|
|
#define GET_INSTRUCTION_NAME
|
|
#include "X86GenAsmWriter.inc"
|
|
|
|
void X86ATTInstPrinter::printInst(const MCInst *MI, raw_ostream &OS) {
|
|
printInstruction(MI, OS);
|
|
|
|
// If verbose assembly is enabled, we can print some informative comments.
|
|
if (CommentStream)
|
|
EmitAnyX86InstComments(MI, *CommentStream, getRegisterName);
|
|
}
|
|
StringRef X86ATTInstPrinter::getOpcodeName(unsigned Opcode) const {
|
|
return getInstructionName(Opcode);
|
|
}
|
|
|
|
|
|
void X86ATTInstPrinter::printSSECC(const MCInst *MI, unsigned Op,
|
|
raw_ostream &O) {
|
|
switch (MI->getOperand(Op).getImm()) {
|
|
default: assert(0 && "Invalid ssecc argument!");
|
|
case 0: O << "eq"; break;
|
|
case 1: O << "lt"; break;
|
|
case 2: O << "le"; break;
|
|
case 3: O << "unord"; break;
|
|
case 4: O << "neq"; break;
|
|
case 5: O << "nlt"; break;
|
|
case 6: O << "nle"; break;
|
|
case 7: O << "ord"; break;
|
|
}
|
|
}
|
|
|
|
/// print_pcrel_imm - This is used to print an immediate value that ends up
|
|
/// being encoded as a pc-relative value (e.g. for jumps and calls). These
|
|
/// print slightly differently than normal immediates. For example, a $ is not
|
|
/// emitted.
|
|
void X86ATTInstPrinter::print_pcrel_imm(const MCInst *MI, unsigned OpNo,
|
|
raw_ostream &O) {
|
|
const MCOperand &Op = MI->getOperand(OpNo);
|
|
if (Op.isImm())
|
|
// Print this as a signed 32-bit value.
|
|
O << (int)Op.getImm();
|
|
else {
|
|
assert(Op.isExpr() && "unknown pcrel immediate operand");
|
|
O << *Op.getExpr();
|
|
}
|
|
}
|
|
|
|
void X86ATTInstPrinter::printOperand(const MCInst *MI, unsigned OpNo,
|
|
raw_ostream &O) {
|
|
const MCOperand &Op = MI->getOperand(OpNo);
|
|
if (Op.isReg()) {
|
|
O << '%' << getRegisterName(Op.getReg());
|
|
} else if (Op.isImm()) {
|
|
O << '$' << Op.getImm();
|
|
|
|
if (CommentStream && (Op.getImm() > 255 || Op.getImm() < -256))
|
|
*CommentStream << format("imm = 0x%llX\n", (long long)Op.getImm());
|
|
|
|
} else {
|
|
assert(Op.isExpr() && "unknown operand kind in printOperand");
|
|
O << '$' << *Op.getExpr();
|
|
}
|
|
}
|
|
|
|
void X86ATTInstPrinter::printMemReference(const MCInst *MI, unsigned Op,
|
|
raw_ostream &O) {
|
|
const MCOperand &BaseReg = MI->getOperand(Op);
|
|
const MCOperand &IndexReg = MI->getOperand(Op+2);
|
|
const MCOperand &DispSpec = MI->getOperand(Op+3);
|
|
const MCOperand &SegReg = MI->getOperand(Op+4);
|
|
|
|
// If this has a segment register, print it.
|
|
if (SegReg.getReg()) {
|
|
printOperand(MI, Op+4, O);
|
|
O << ':';
|
|
}
|
|
|
|
if (DispSpec.isImm()) {
|
|
int64_t DispVal = DispSpec.getImm();
|
|
if (DispVal || (!IndexReg.getReg() && !BaseReg.getReg()))
|
|
O << DispVal;
|
|
} else {
|
|
assert(DispSpec.isExpr() && "non-immediate displacement for LEA?");
|
|
O << *DispSpec.getExpr();
|
|
}
|
|
|
|
if (IndexReg.getReg() || BaseReg.getReg()) {
|
|
O << '(';
|
|
if (BaseReg.getReg())
|
|
printOperand(MI, Op, O);
|
|
|
|
if (IndexReg.getReg()) {
|
|
O << ',';
|
|
printOperand(MI, Op+2, O);
|
|
unsigned ScaleVal = MI->getOperand(Op+1).getImm();
|
|
if (ScaleVal != 1)
|
|
O << ',' << ScaleVal;
|
|
}
|
|
O << ')';
|
|
}
|
|
}
|