mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-14 11:32:34 +00:00
eca517deaa
for the Sparc port. Use the same initializeSubtargetDependencies function to handle initialization similar to the other ports to handle dependencies. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211811 91177308-0d34-0410-b5e6-96231b3b80d8
110 lines
3.3 KiB
C++
110 lines
3.3 KiB
C++
//===-- SparcSubtarget.cpp - SPARC Subtarget Information ------------------===//
|
|
//
|
|
// 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 SPARC specific subclass of TargetSubtargetInfo.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "SparcSubtarget.h"
|
|
#include "Sparc.h"
|
|
#include "llvm/Support/MathExtras.h"
|
|
#include "llvm/Support/TargetRegistry.h"
|
|
|
|
using namespace llvm;
|
|
|
|
#define DEBUG_TYPE "sparc-subtarget"
|
|
|
|
#define GET_SUBTARGETINFO_TARGET_DESC
|
|
#define GET_SUBTARGETINFO_CTOR
|
|
#include "SparcGenSubtargetInfo.inc"
|
|
|
|
void SparcSubtarget::anchor() { }
|
|
|
|
static std::string computeDataLayout(const SparcSubtarget &ST) {
|
|
// Sparc is big endian.
|
|
std::string Ret = "E-m:e";
|
|
|
|
// Some ABIs have 32bit pointers.
|
|
if (!ST.is64Bit())
|
|
Ret += "-p:32:32";
|
|
|
|
// Alignments for 64 bit integers.
|
|
Ret += "-i64:64";
|
|
|
|
// On SparcV9 128 floats are aligned to 128 bits, on others only to 64.
|
|
// On SparcV9 registers can hold 64 or 32 bits, on others only 32.
|
|
if (ST.is64Bit())
|
|
Ret += "-n32:64";
|
|
else
|
|
Ret += "-f128:64-n32";
|
|
|
|
if (ST.is64Bit())
|
|
Ret += "-S128";
|
|
else
|
|
Ret += "-S64";
|
|
|
|
return Ret;
|
|
}
|
|
|
|
SparcSubtarget &SparcSubtarget::initializeSubtargetDependencies(StringRef CPU,
|
|
StringRef FS) {
|
|
IsV9 = false;
|
|
V8DeprecatedInsts = false;
|
|
IsVIS = false;
|
|
HasHardQuad = false;
|
|
UsePopc = false;
|
|
|
|
// Determine default and user specified characteristics
|
|
std::string CPUName = CPU;
|
|
if (CPUName.empty())
|
|
CPUName = (Is64Bit) ? "v9" : "v8";
|
|
|
|
// Parse features string.
|
|
ParseSubtargetFeatures(CPUName, FS);
|
|
|
|
// Popc is a v9-only instruction.
|
|
if (!IsV9)
|
|
UsePopc = false;
|
|
|
|
return *this;
|
|
}
|
|
|
|
SparcSubtarget::SparcSubtarget(const std::string &TT, const std::string &CPU,
|
|
const std::string &FS, TargetMachine &TM,
|
|
bool is64Bit)
|
|
: SparcGenSubtargetInfo(TT, CPU, FS), Is64Bit(is64Bit),
|
|
DL(computeDataLayout(initializeSubtargetDependencies(CPU, FS))),
|
|
InstrInfo(*this), TLInfo(TM), TSInfo(DL), FrameLowering(*this) {}
|
|
|
|
int SparcSubtarget::getAdjustedFrameSize(int frameSize) const {
|
|
|
|
if (is64Bit()) {
|
|
// All 64-bit stack frames must be 16-byte aligned, and must reserve space
|
|
// for spilling the 16 window registers at %sp+BIAS..%sp+BIAS+128.
|
|
frameSize += 128;
|
|
// Frames with calls must also reserve space for 6 outgoing arguments
|
|
// whether they are used or not. LowerCall_64 takes care of that.
|
|
assert(frameSize % 16 == 0 && "Stack size not 16-byte aligned");
|
|
} else {
|
|
// Emit the correct save instruction based on the number of bytes in
|
|
// the frame. Minimum stack frame size according to V8 ABI is:
|
|
// 16 words for register window spill
|
|
// 1 word for address of returned aggregate-value
|
|
// + 6 words for passing parameters on the stack
|
|
// ----------
|
|
// 23 words * 4 bytes per word = 92 bytes
|
|
frameSize += 92;
|
|
|
|
// Round up to next doubleword boundary -- a double-word boundary
|
|
// is required by the ABI.
|
|
frameSize = RoundUpToAlignment(frameSize, 8);
|
|
}
|
|
return frameSize;
|
|
}
|