//===-- FloatingPoint.cpp - Floating point Reg -> Stack converter ---------===//
+//
+// 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 pass which converts floating point instructions from
// virtual registers into register stack instructions.
#include <algorithm>
#include <iostream>
+namespace llvm {
+
namespace {
Statistic<> NumFXCH("x86-codegen", "Number of fxch instructions inserted");
Statistic<> NumFP ("x86-codegen", "Number of floating point instructions");
// getSTReg - Return the X86::ST(i) register which contains the specified
// FP<RegNo> register
unsigned getSTReg(unsigned RegNo) const {
- return StackTop - 1 - getSlot(RegNo) + X86::ST0;
+ return StackTop - 1 - getSlot(RegNo) + llvm::X86::ST0;
}
// pushReg - Push the specifiex FP<n> register onto the stack
};
}
-Pass *createX86FloatingPointStackifierPass() { return new FPS(); }
+FunctionPass *createX86FloatingPointStackifierPass() { return new FPS(); }
/// runOnMachineFunction - Loop over all of the basic blocks, transforming FP
/// register references into FP stack references.
if (Reg >= X86::FP0 && Reg <= X86::FP6) {
DEBUG(std::cerr << "Register FP#" << Reg-X86::FP0 << " is dead!\n");
++I; // Insert fxch AFTER the instruction
- moveToTop(Reg-X86::FP0, I); // Insert fxch if neccesary
+ moveToTop(Reg-X86::FP0, I); // Insert fxch if necessary
--I; // Move to fxch or old instruction
popStackAfter(I); // Pop the top of the stack, killing value
}
// element is an instruction, the second is the version which pops.
//
static const TableEntry PopTable[] = {
+ { X86::FADDrST0 , X86::FADDPrST0 },
+
+ { X86::FDIVRrST0, X86::FDIVRPrST0 },
+ { X86::FDIVrST0 , X86::FDIVPrST0 },
+
+ { X86::FISTr16 , X86::FISTPr16 },
+ { X86::FISTr32 , X86::FISTPr32 },
+
+ { X86::FMULrST0 , X86::FMULPrST0 },
+
{ X86::FSTr32 , X86::FSTPr32 },
{ X86::FSTr64 , X86::FSTPr64 },
{ X86::FSTrr , X86::FSTPrr },
- { X86::FISTr16 , X86::FISTPr16 },
- { X86::FISTr32 , X86::FISTPr32 },
- { X86::FADDrST0 , X86::FADDPrST0 },
- { X86::FSUBrST0 , X86::FSUBPrST0 },
{ X86::FSUBRrST0, X86::FSUBRPrST0 },
- { X86::FMULrST0 , X86::FMULPrST0 },
- { X86::FDIVrST0 , X86::FDIVPrST0 },
- { X86::FDIVRrST0, X86::FDIVRPrST0 },
+ { X86::FSUBrST0 , X86::FSUBPrST0 },
- { X86::FUCOMr , X86::FUCOMPr },
{ X86::FUCOMPr , X86::FUCOMPPr },
+ { X86::FUCOMr , X86::FUCOMPr },
};
/// popStackAfter - Pop the current value off of the top of the FP stack after
// ForwardST0Table - Map: A = B op C into: ST(0) = ST(0) op ST(i)
static const TableEntry ForwardST0Table[] = {
{ X86::FpADD, X86::FADDST0r },
- { X86::FpSUB, X86::FSUBST0r },
- { X86::FpMUL, X86::FMULST0r },
{ X86::FpDIV, X86::FDIVST0r },
+ { X86::FpMUL, X86::FMULST0r },
+ { X86::FpSUB, X86::FSUBST0r },
{ X86::FpUCOM, X86::FUCOMr },
};
// ReverseST0Table - Map: A = B op C into: ST(0) = ST(i) op ST(0)
static const TableEntry ReverseST0Table[] = {
{ X86::FpADD, X86::FADDST0r }, // commutative
- { X86::FpSUB, X86::FSUBRST0r },
- { X86::FpMUL, X86::FMULST0r }, // commutative
{ X86::FpDIV, X86::FDIVRST0r },
+ { X86::FpMUL, X86::FMULST0r }, // commutative
+ { X86::FpSUB, X86::FSUBRST0r },
{ X86::FpUCOM, ~0 },
};
// ForwardSTiTable - Map: A = B op C into: ST(i) = ST(0) op ST(i)
static const TableEntry ForwardSTiTable[] = {
{ X86::FpADD, X86::FADDrST0 }, // commutative
- { X86::FpSUB, X86::FSUBRrST0 },
- { X86::FpMUL, X86::FMULrST0 }, // commutative
{ X86::FpDIV, X86::FDIVRrST0 },
+ { X86::FpMUL, X86::FMULrST0 }, // commutative
+ { X86::FpSUB, X86::FSUBRrST0 },
{ X86::FpUCOM, X86::FUCOMr },
};
// ReverseSTiTable - Map: A = B op C into: ST(i) = ST(i) op ST(0)
static const TableEntry ReverseSTiTable[] = {
{ X86::FpADD, X86::FADDrST0 },
- { X86::FpSUB, X86::FSUBrST0 },
- { X86::FpMUL, X86::FMULrST0 },
{ X86::FpDIV, X86::FDIVrST0 },
+ { X86::FpMUL, X86::FMULrST0 },
+ { X86::FpSUB, X86::FSUBrST0 },
{ X86::FpUCOM, ~0 },
};
/// handleSpecialFP - Handle special instructions which behave unlike other
-/// floating point instructions. This is primarily inteaded for use by pseudo
+/// floating point instructions. This is primarily intended for use by pseudo
/// instructions.
///
void FPS::handleSpecialFP(MachineBasicBlock::iterator &I) {
I = MBB->erase(I)-1; // Remove the pseudo instruction
}
+
+} // End llvm namespace