mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-19 01:13:25 +00:00
9170ab6685
for "thumb" and add a check for V6T2. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73905 91177308-0d34-0410-b5e6-96231b3b80d8
97 lines
2.8 KiB
C++
97 lines
2.8 KiB
C++
//===-- ARMSubtarget.cpp - ARM Subtarget Information ------------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file implements the ARM specific subclass of TargetSubtarget.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "ARMSubtarget.h"
|
|
#include "ARMGenSubtarget.inc"
|
|
#include "llvm/Module.h"
|
|
#include "llvm/Target/TargetMachine.h"
|
|
#include "llvm/Target/TargetOptions.h"
|
|
#include "llvm/Support/CommandLine.h"
|
|
using namespace llvm;
|
|
|
|
static cl::opt<bool>
|
|
ReserveR9("arm-reserve-r9", cl::Hidden,
|
|
cl::desc("Reserve R9, making it unavailable as GPR"));
|
|
|
|
ARMSubtarget::ARMSubtarget(const Module &M, const std::string &FS,
|
|
bool isThumb)
|
|
: ARMArchVersion(V4T)
|
|
, ARMFPUType(None)
|
|
, IsThumb(isThumb)
|
|
, ThumbMode(Thumb1)
|
|
, IsR9Reserved(ReserveR9)
|
|
, stackAlignment(4)
|
|
, CPUString("generic")
|
|
, TargetType(isELF) // Default to ELF unless otherwise specified.
|
|
, TargetABI(ARM_ABI_APCS) {
|
|
// default to soft float ABI
|
|
if (FloatABIType == FloatABI::Default)
|
|
FloatABIType = FloatABI::Soft;
|
|
|
|
// Determine default and user specified characteristics
|
|
|
|
// Parse features string.
|
|
CPUString = ParseSubtargetFeatures(FS, CPUString);
|
|
|
|
// Set the boolean corresponding to the current target triple, or the default
|
|
// if one cannot be determined, to true.
|
|
const std::string& TT = M.getTargetTriple();
|
|
unsigned Len = TT.length();
|
|
unsigned Idx = 0;
|
|
|
|
if (Len >= 5 && TT.substr(0, 4) == "armv")
|
|
Idx = 4;
|
|
else if (Len >= 6 && TT.substr(0, 5) == "thumb") {
|
|
IsThumb = true;
|
|
if (Len >= 7 && TT[5] == 'v')
|
|
Idx = 6;
|
|
}
|
|
if (Idx) {
|
|
unsigned SubVer = TT[Idx];
|
|
if (SubVer > '4' && SubVer <= '9') {
|
|
if (SubVer >= '7') {
|
|
ARMArchVersion = V7A;
|
|
} else if (SubVer == '6') {
|
|
ARMArchVersion = V6;
|
|
if (Len >= Idx+3 && TT[Idx+1] == 't' && TT[Idx+2] == '2')
|
|
ARMArchVersion = V6T2;
|
|
} else if (SubVer == '5') {
|
|
ARMArchVersion = V5T;
|
|
if (Len >= Idx+3 && TT[Idx+1] == 't' && TT[Idx+2] == 'e')
|
|
ARMArchVersion = V5TE;
|
|
}
|
|
if (ARMArchVersion >= V6T2)
|
|
ThumbMode = Thumb2;
|
|
}
|
|
}
|
|
|
|
if (Len >= 10) {
|
|
if (TT.find("-darwin") != std::string::npos)
|
|
// arm-darwin
|
|
TargetType = isDarwin;
|
|
} else if (TT.empty()) {
|
|
#if defined(__APPLE__)
|
|
TargetType = isDarwin;
|
|
#endif
|
|
}
|
|
|
|
if (TT.find("eabi") != std::string::npos)
|
|
TargetABI = ARM_ABI_AAPCS;
|
|
|
|
if (isAAPCS_ABI())
|
|
stackAlignment = 8;
|
|
|
|
if (isTargetDarwin())
|
|
IsR9Reserved = ReserveR9 | (ARMArchVersion < V6);
|
|
}
|