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//===-- Sparc.cpp - General implementation file for the Sparc Target ------===//
//
// This file contains the code for the Sparc Target that does not fit in any of
// the other files in this directory.
//
//===----------------------------------------------------------------------===//
#include "SparcInternals.h"
#include "llvm/Target/Sparc.h"
#include "llvm/Function.h"
#include "llvm/BasicBlock.h"
#include "llvm/CodeGen/MachineCodeForMethod.h"
#include <iostream>
using std::cerr;
// Build the MachineInstruction Description Array...
const MachineInstrDescriptor SparcMachineInstrDesc[] = {
#define I(ENUM, OPCODESTRING, NUMOPERANDS, RESULTPOS, MAXIMM, IMMSE, \
NUMDELAYSLOTS, LATENCY, SCHEDCLASS, INSTFLAGS) \
{ OPCODESTRING, NUMOPERANDS, RESULTPOS, MAXIMM, IMMSE, \
NUMDELAYSLOTS, LATENCY, SCHEDCLASS, INSTFLAGS },
#include "SparcInstr.def"
};
//----------------------------------------------------------------------------
// allocateSparcTargetMachine - Allocate and return a subclass of TargetMachine
// that implements the Sparc backend. (the llvm/CodeGen/Sparc.h interface)
//----------------------------------------------------------------------------
TargetMachine *allocateSparcTargetMachine() { return new UltraSparc(); }
//---------------------------------------------------------------------------
// class UltraSparcFrameInfo
//
// Purpose:
// Interface to stack frame layout info for the UltraSPARC.
// Starting offsets for each area of the stack frame are aligned at
// a multiple of getStackFrameSizeAlignment().
//---------------------------------------------------------------------------
int
UltraSparcFrameInfo::getFirstAutomaticVarOffset(MachineCodeForMethod& ,
bool& pos) const
{
pos = false; // static stack area grows downwards
return StaticAreaOffsetFromFP;
}
int
UltraSparcFrameInfo::getRegSpillAreaOffset(MachineCodeForMethod& mcInfo,
bool& pos) const
{
mcInfo.freezeAutomaticVarsArea(); // ensure no more auto vars are added
pos = false; // static stack area grows downwards
unsigned int autoVarsSize = mcInfo.getAutomaticVarsSize();
return StaticAreaOffsetFromFP - autoVarsSize;
}
int
UltraSparcFrameInfo::getTmpAreaOffset(MachineCodeForMethod& mcInfo,
bool& pos) const
{
mcInfo.freezeAutomaticVarsArea(); // ensure no more auto vars are added
mcInfo.freezeSpillsArea(); // ensure no more spill slots are added
pos = false; // static stack area grows downwards
unsigned int autoVarsSize = mcInfo.getAutomaticVarsSize();
unsigned int spillAreaSize = mcInfo.getRegSpillsSize();
int offset = autoVarsSize + spillAreaSize;
return StaticAreaOffsetFromFP - offset;
}
int
UltraSparcFrameInfo::getDynamicAreaOffset(MachineCodeForMethod& mcInfo,
bool& pos) const
{
// Dynamic stack area grows downwards starting at top of opt-args area.
// The opt-args, required-args, and register-save areas are empty except
// during calls and traps, so they are shifted downwards on each
// dynamic-size alloca.
pos = false;
unsigned int optArgsSize = mcInfo.getMaxOptionalArgsSize();
if (int extra = optArgsSize % getStackFrameSizeAlignment())
optArgsSize += (getStackFrameSizeAlignment() - extra);
int offset = optArgsSize + FirstOptionalOutgoingArgOffsetFromSP;
assert((offset - OFFSET) % getStackFrameSizeAlignment() == 0);
return offset;
}
//---------------------------------------------------------------------------
// class UltraSparcMachine
//
// Purpose:
// Primary interface to machine description for the UltraSPARC.
// Primarily just initializes machine-dependent parameters in
// class TargetMachine, and creates machine-dependent subclasses
// for classes such as MachineInstrInfo.
//
//---------------------------------------------------------------------------
UltraSparc::UltraSparc()
: TargetMachine("UltraSparc-Native"),
instrInfo(*this),
schedInfo(*this),
regInfo(*this),
frameInfo(*this),
cacheInfo(*this),
optInfo(*this)
{
optSizeForSubWordData = 4;
minMemOpWordSize = 8;
maxAtomicMemOpWordSize = 8;
}
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