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/* Title: SparcRegClassInfo.h -*- C++ -*-
Author: Ruchira Sasanka
Date: Aug 20, 01
Purpose: Contains the description of integer register class of Sparc
*/
#ifndef SPARC_INT_REG_CLASS_H
#define SPARC_INT_REG_CLASS_H
#include "llvm/Target/RegInfo.h"
#include "llvm/CodeGen/IGNode.h"
//-----------------------------------------------------------------------------
// Integer Register Class
//-----------------------------------------------------------------------------
// Int register names in same order as enum in class SparcIntRegOrder
static string const IntRegNames[] =
{ "g1", "g2", "g3", "g4", "g5", "g6", "g7",
"o0", "o1", "o2", "o3", "o4", "o5", "o7",
"l0", "l1", "l2", "l3", "l4", "l5", "l6", "l7",
"i0", "i1", "i2", "i3", "i4", "i5",
"g0", "i6", "i7", "o6" };
class SparcIntRegOrder{
public:
enum RegsInPrefOrder // colors possible for a LR (in preferred order)
{
// --- following colors are volatile across function calls
// %g0 can't be used for coloring - always 0
g1, g2, g3, g4, g5, g6, g7, //%g1-%g7
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 - can be used if saved
// 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
g0, i6, i7, o6
};
// max # of colors reg coloring can allocate
static unsigned int const NumOfAvailRegs = g0;
static unsigned int const StartOfNonVolatileRegs = l0;
static unsigned int const StartOfAllRegs = g1;
static unsigned int const NumOfAllRegs = o6 + 1;
static const string getRegName(const unsigned reg) {
assert( reg < NumOfAllRegs );
return IntRegNames[reg];
}
};
class SparcIntRegClass : public MachineRegClassInfo
{
public:
SparcIntRegClass(unsigned ID)
: MachineRegClassInfo(ID,
SparcIntRegOrder::NumOfAvailRegs,
SparcIntRegOrder::NumOfAllRegs)
{ }
void colorIGNode(IGNode * Node, bool IsColorUsedArr[] ) const;
};
//-----------------------------------------------------------------------------
// Float Register Class
//-----------------------------------------------------------------------------
static string const FloatRegNames[] =
{
"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"
};
class SparcFloatRegOrder{
public:
enum RegsInPrefOrder {
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.
static unsigned int const NumOfAvailRegs = 32;
static unsigned int const NumOfAllRegs = 64;
static unsigned int const StartOfNonVolatileRegs = f6;
static unsigned int const StartOfAllRegs = f0;
static const string getRegName(const unsigned reg) {
assert( reg < NumOfAllRegs );
return FloatRegNames[reg];
}
};
class SparcFloatRegClass : public MachineRegClassInfo
{
private:
int findFloatColor(const IGNode *const Node, unsigned Start,
unsigned End, bool IsColorUsedArr[] ) const;
public:
SparcFloatRegClass(unsigned ID)
: MachineRegClassInfo(ID,
SparcFloatRegOrder::NumOfAvailRegs,
SparcFloatRegOrder::NumOfAllRegs)
{ }
void colorIGNode(IGNode * Node, bool IsColorUsedArr[] ) const;
};
//-----------------------------------------------------------------------------
// Int CC Register Class
// Only one integer cc register is available
//-----------------------------------------------------------------------------
class SparcIntCCRegClass : public MachineRegClassInfo
{
public:
SparcIntCCRegClass(unsigned ID)
: MachineRegClassInfo(ID,1, 1) { }
inline void colorIGNode(IGNode * Node, bool IsColorUsedArr[] ) const {
Node->setColor(0); // only one int cc reg is available
}
};
//-----------------------------------------------------------------------------
// Float CC Register Class
// Only 4 Float CC registers are available
//-----------------------------------------------------------------------------
static string const FloatCCRegNames[] =
{
"fcc0", "fcc1", "fcc2", "fcc3"
};
class SparcFloatCCRegOrder{
public:
enum RegsInPrefOrder {
fcc0, fcc1, fcc2, fcc3
};
static const string getRegName(const unsigned reg) {
assert( reg < 4 );
return FloatCCRegNames[reg];
}
};
class SparcFloatCCRegClass : public MachineRegClassInfo
{
public:
SparcFloatCCRegClass(unsigned ID)
: MachineRegClassInfo(ID, 4, 4) { }
void colorIGNode(IGNode * Node, bool IsColorUsedArr[] ) const {
int c;
for(c=0; c < 4 && IsColorUsedArr[c] ; ++c) ; // find color
assert( (c < 4) && "Can allocate only 4 float cc registers");
Node->setColor(c);
}
};
#endif
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