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//===- MCInstPrinter.cpp - Convert an MCInst to target assembly syntax ----===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/MC/MCInstPrinter.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCInstrInfo.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/raw_ostream.h"
#include <cinttypes>
#include <cstdint>
using namespace llvm;
void llvm::dumpBytes(ArrayRef<uint8_t> bytes, raw_ostream &OS) {
static const char hex_rep[] = "0123456789abcdef";
bool First = true;
for (char i: bytes) {
if (First)
First = false;
else
OS << ' ';
OS << hex_rep[(i & 0xF0) >> 4];
OS << hex_rep[i & 0xF];
}
}
MCInstPrinter::~MCInstPrinter() = default;
/// getOpcodeName - Return the name of the specified opcode enum (e.g.
/// "MOV32ri") or empty if we can't resolve it.
StringRef MCInstPrinter::getOpcodeName(unsigned Opcode) const {
return MII.getName(Opcode);
}
void MCInstPrinter::printRegName(raw_ostream &OS, unsigned RegNo) const {
llvm_unreachable("Target should implement this");
}
void MCInstPrinter::printAnnotation(raw_ostream &OS, StringRef Annot) {
if (!Annot.empty()) {
if (CommentStream) {
(*CommentStream) << Annot;
// By definition (see MCInstPrinter.h), CommentStream must end with
// a newline after each comment.
if (Annot.back() != '\n')
(*CommentStream) << '\n';
} else
OS << " " << MAI.getCommentString() << " " << Annot;
}
}
/// Utility functions to make adding mark ups simpler.
StringRef MCInstPrinter::markup(StringRef s) const {
if (getUseMarkup())
return s;
else
return "";
}
StringRef MCInstPrinter::markup(StringRef a, StringRef b) const {
if (getUseMarkup())
return a;
else
return b;
}
// For asm-style hex (e.g. 0ffh) the first digit always has to be a number.
static bool needsLeadingZero(uint64_t Value)
{
while (Value)
{
uint64_t digit = (Value >> 60) & 0xf;
if (digit != 0)
return (digit >= 0xa);
Value <<= 4;
}
return false;
}
format_object<int64_t> MCInstPrinter::formatDec(int64_t Value) const {
return format("%" PRId64, Value);
}
format_object<int64_t> MCInstPrinter::formatHex(int64_t Value) const {
switch(PrintHexStyle) {
case HexStyle::C:
if (Value < 0)
return format("-0x%" PRIx64, -Value);
else
return format("0x%" PRIx64, Value);
case HexStyle::Asm:
if (Value < 0) {
if (needsLeadingZero((uint64_t)(-Value)))
return format("-0%" PRIx64 "h", -Value);
else
return format("-%" PRIx64 "h", -Value);
} else {
if (needsLeadingZero((uint64_t)(Value)))
return format("0%" PRIx64 "h", Value);
else
return format("%" PRIx64 "h", Value);
}
}
llvm_unreachable("unsupported print style");
}
format_object<uint64_t> MCInstPrinter::formatHex(uint64_t Value) const {
switch(PrintHexStyle) {
case HexStyle::C:
return format("0x%" PRIx64, Value);
case HexStyle::Asm:
if (needsLeadingZero(Value))
return format("0%" PRIx64 "h", Value);
else
return format("%" PRIx64 "h", Value);
}
llvm_unreachable("unsupported print style");
}
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