mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-25 04:02:41 +01:00
225 lines
7.6 KiB
C++
225 lines
7.6 KiB
C++
//===-- SparcV9RegClassInfo.h - Register class def'ns for SparcV9 -*- C++ -*-=//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file was developed by the LLVM research group and is distributed under
|
|
// the University of Illinois Open Source License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines the register classes used by the SparcV9 target. It
|
|
// implicitly defines (using enums) the "class register numbers" used in
|
|
// the SparcV9 target, which are converted using a formula in the SparcV9RegInfo
|
|
// class to "unified register numbers".
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef SPARCV9REGCLASSINFO_H
|
|
#define SPARCV9REGCLASSINFO_H
|
|
|
|
#include "SparcV9RegInfo.h"
|
|
|
|
namespace llvm {
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Integer Register Class
|
|
//-----------------------------------------------------------------------------
|
|
|
|
struct SparcV9IntRegClass : public TargetRegClassInfo {
|
|
SparcV9IntRegClass(unsigned ID)
|
|
: TargetRegClassInfo(ID, NumOfAvailRegs, NumOfAllRegs) { }
|
|
|
|
void colorIGNode(IGNode *Node,
|
|
const std::vector<bool> &IsColorUsedArr) const;
|
|
|
|
inline bool isRegVolatile(int Reg) const {
|
|
return (Reg < (int)StartOfNonVolatileRegs);
|
|
}
|
|
|
|
inline bool modifiedByCall(int Reg) const {
|
|
return Reg==(int)ModifiedByCall;
|
|
}
|
|
|
|
enum { // colors possible for a LR (in preferred order)
|
|
// --- following colors are volatile across function calls
|
|
// %g0 can't be used for coloring - always 0
|
|
o0, o1, o2, o3, o4, o5, o7, // %o0-%o5,
|
|
|
|
// %o6 is sp,
|
|
// all %0's can get modified by a call
|
|
|
|
// --- following colors are NON-volatile across function calls
|
|
l0, l1, l2, l3, l4, l5, l6, l7, // %l0-%l7
|
|
i0, i1, i2, i3, i4, i5, // %i0-%i5: i's need not be preserved
|
|
|
|
// %i6 is the fp - so not allocated
|
|
// %i7 is the ret address by convention - can be used for others
|
|
|
|
// max # of colors reg coloring can allocate (NumOfAvailRegs)
|
|
|
|
// --- following colors are not available for allocation within this phase
|
|
// --- but can appear for pre-colored ranges
|
|
|
|
i6, i7, g0, g1, g2, g3, g4, g5, g6, g7, o6,
|
|
|
|
NumOfAllRegs, // Must be first AFTER registers...
|
|
|
|
//*** NOTE: If we decide to use some %g regs, they are volatile
|
|
// (see sparc64ABI)
|
|
// Move the %g regs from the end of the enumeration to just above the
|
|
// enumeration of %o0 (change StartOfAllRegs below)
|
|
// change isRegVloatile method below
|
|
// Also change IntRegNames above.
|
|
|
|
// max # of colors reg coloring can allocate
|
|
NumOfAvailRegs = i6,
|
|
|
|
StartOfNonVolatileRegs = l0,
|
|
StartOfAllRegs = o0,
|
|
|
|
ModifiedByCall = o7,
|
|
};
|
|
|
|
const char * const getRegName(unsigned reg) const;
|
|
};
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Float Register Class
|
|
//-----------------------------------------------------------------------------
|
|
|
|
class SparcV9FloatRegClass : public TargetRegClassInfo {
|
|
int findFloatColor(const LiveRange *LR, unsigned Start,
|
|
unsigned End,
|
|
const std::vector<bool> &IsColorUsedArr) const;
|
|
public:
|
|
SparcV9FloatRegClass(unsigned ID)
|
|
: TargetRegClassInfo(ID, NumOfAvailRegs, NumOfAllRegs) {}
|
|
|
|
// This method marks the registers used for a given register number.
|
|
// This marks a single register for Float regs, but the R,R+1 pair
|
|
// for double-precision registers.
|
|
//
|
|
virtual void markColorsUsed(unsigned RegInClass,
|
|
int UserRegType,
|
|
int RegTypeWanted,
|
|
std::vector<bool> &IsColorUsedArr) const;
|
|
|
|
// This method finds unused registers of the specified register type,
|
|
// using the given "used" flag array IsColorUsedArr. It checks a single
|
|
// entry in the array directly for float regs, and checks the pair [R,R+1]
|
|
// for double-precision registers
|
|
// It returns -1 if no unused color is found.
|
|
//
|
|
virtual int findUnusedColor(int RegTypeWanted,
|
|
const std::vector<bool> &IsColorUsedArr) const;
|
|
|
|
void colorIGNode(IGNode *Node,
|
|
const std::vector<bool> &IsColorUsedArr) const;
|
|
|
|
// according to SparcV9 64 ABI, all %fp regs are volatile
|
|
inline bool isRegVolatile(int Reg) const { return true; }
|
|
|
|
enum {
|
|
f0, f1, f2, f3, f4, f5, f6, f7, f8, f9,
|
|
f10, f11, f12, f13, f14, f15, f16, f17, f18, f19,
|
|
f20, f21, f22, f23, f24, f25, f26, f27, f28, f29,
|
|
f30, f31, f32, f33, f34, f35, f36, f37, f38, f39,
|
|
f40, f41, f42, f43, f44, f45, f46, f47, f48, f49,
|
|
f50, f51, f52, f53, f54, f55, f56, f57, f58, f59,
|
|
f60, f61, f62, f63,
|
|
|
|
// there are 64 regs alltogether but only 32 regs can be allocated at
|
|
// a time.
|
|
//
|
|
NumOfAvailRegs = 32,
|
|
NumOfAllRegs = 64,
|
|
|
|
StartOfNonVolatileRegs = f32,
|
|
StartOfAllRegs = f0,
|
|
};
|
|
|
|
const char * const getRegName(unsigned reg) const;
|
|
};
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Int CC Register Class
|
|
// Only one integer cc register is available. However, this register is
|
|
// referred to as %xcc or %icc when instructions like subcc are executed but
|
|
// referred to as %ccr (i.e., %xcc . %icc") when this register is moved
|
|
// into an integer register using RD or WR instrcutions. So, three ids are
|
|
// allocated for the three names.
|
|
//-----------------------------------------------------------------------------
|
|
|
|
struct SparcV9IntCCRegClass : public TargetRegClassInfo {
|
|
SparcV9IntCCRegClass(unsigned ID)
|
|
: TargetRegClassInfo(ID, 1, 3) { }
|
|
|
|
void colorIGNode(IGNode *Node,
|
|
const std::vector<bool> &IsColorUsedArr) const;
|
|
|
|
// according to the 64-bit SparcV9 ABI, all integer CC regs are
|
|
// volatile.
|
|
inline bool isRegVolatile(int Reg) const { return true; }
|
|
|
|
enum {
|
|
xcc, icc, ccr // only one is available - see the note above
|
|
};
|
|
|
|
const char * const getRegName(unsigned reg) const;
|
|
};
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Float CC Register Class
|
|
// Only 4 Float CC registers are available for allocation.
|
|
//-----------------------------------------------------------------------------
|
|
|
|
struct SparcV9FloatCCRegClass : public TargetRegClassInfo {
|
|
SparcV9FloatCCRegClass(unsigned ID)
|
|
: TargetRegClassInfo(ID, 4, 4) { }
|
|
|
|
void colorIGNode(IGNode *Node,
|
|
const std::vector<bool> &IsColorUsedArr) const;
|
|
|
|
// according to the 64-bit SparcV9 ABI, all floating-point CC regs are
|
|
// volatile.
|
|
inline bool isRegVolatile(int Reg) const { return true; }
|
|
|
|
enum {
|
|
fcc0, fcc1, fcc2, fcc3
|
|
};
|
|
|
|
const char * const getRegName(unsigned reg) const;
|
|
};
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// SparcV9 special register class. These registers are not used for allocation
|
|
// but are used as arguments of some instructions.
|
|
//-----------------------------------------------------------------------------
|
|
|
|
struct SparcV9SpecialRegClass : public TargetRegClassInfo {
|
|
SparcV9SpecialRegClass(unsigned ID)
|
|
: TargetRegClassInfo(ID, 0, 1) { }
|
|
|
|
void colorIGNode(IGNode *Node,
|
|
const std::vector<bool> &IsColorUsedArr) const {
|
|
assert(0 && "SparcV9SpecialRegClass should never be used for allocation");
|
|
}
|
|
|
|
// all currently included special regs are volatile
|
|
inline bool isRegVolatile(int Reg) const { return true; }
|
|
|
|
enum {
|
|
fsr // floating point state register
|
|
};
|
|
|
|
const char * const getRegName(unsigned reg) const;
|
|
};
|
|
|
|
} // End llvm namespace
|
|
|
|
#endif
|