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Add memory operand folding support for MUL, DIV, IDIV, NEG, NOT, 

MOVSX, and MOVZX.

llvm-svn: 11546
This commit is contained in:
Alkis Evlogimenos 2004-02-17 09:14:23 +00:00
parent 93398df103
commit e5585328d8
2 changed files with 45 additions and 0 deletions
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23
llvm/lib/Target/X86/X86InstrInfo.td
View File

@ -220,16 +220,25 @@ def MOVmr32 : X86Inst<"mov", 0x89, MRMDestMem, Arg32>; // [mem] = R32
def MULr8 : X86Inst<"mul", 0xF6, MRMS4r, Arg8 >, Imp<[AL],[AX]>; // AL,AH = AL*R8
def MULr16 : X86Inst<"mul", 0xF7, MRMS4r, Arg16>, Imp<[AX],[AX,DX]>, OpSize; // AX,DX = AX*R16
def MULr32 : X86Inst<"mul", 0xF7, MRMS4r, Arg32>, Imp<[EAX],[EAX,EDX]>; // EAX,EDX = EAX*R32
def MULm8 : X86Inst<"mul", 0xF6, MRMS4m, Arg8 >, Imp<[AL],[AX]>; // AL,AH = AL*[mem8]
def MULm16 : X86Inst<"mul", 0xF7, MRMS4m, Arg16>, Imp<[AX],[AX,DX]>, OpSize; // AX,DX = AX*[mem16]
def MULm32 : X86Inst<"mul", 0xF7, MRMS4m, Arg32>, Imp<[EAX],[EAX,EDX]>; // EAX,EDX = EAX*[mem32]
// unsigned division/remainder
def DIVr8 : X86Inst<"div", 0xF6, MRMS6r, Arg8 >, Imp<[AX],[AX]>; // AX/r8 = AL,AH
def DIVr16 : X86Inst<"div", 0xF7, MRMS6r, Arg16>, Imp<[AX,DX],[AX,DX]>, OpSize; // DX:AX/r16 = AX,DX
def DIVr32 : X86Inst<"div", 0xF7, MRMS6r, Arg32>, Imp<[EAX,EDX],[EAX,EDX]>; // EDX:EAX/r32 = EAX,EDX
def DIVm8 : X86Inst<"div", 0xF6, MRMS6m, Arg8 >, Imp<[AX],[AX]>; // AX/[mem8] = AL,AH
def DIVm16 : X86Inst<"div", 0xF7, MRMS6m, Arg16>, Imp<[AX,DX],[AX,DX]>, OpSize; // DX:AX/[mem16] = AX,DX
def DIVm32 : X86Inst<"div", 0xF7, MRMS6m, Arg32>, Imp<[EAX,EDX],[EAX,EDX]>; // EDX:EAX/[mem32] = EAX,EDX
// signed division/remainder
def IDIVr8 : X86Inst<"idiv",0xF6, MRMS7r, Arg8 >, Imp<[AX],[AX]>; // AX/r8 = AL,AH
def IDIVr16: X86Inst<"idiv",0xF7, MRMS7r, Arg16>, Imp<[AX,DX],[AX,DX]>, OpSize; // DX:AX/r16 = AX,DX
def IDIVr32: X86Inst<"idiv",0xF7, MRMS7r, Arg32>, Imp<[EAX,EDX],[EAX,EDX]>; // EDX:EAX/r32 = EAX,EDX
def IDIVm8 : X86Inst<"idiv",0xF6, MRMS7m, Arg8 >, Imp<[AX],[AX]>; // AX/[mem8] = AL,AH
def IDIVm16: X86Inst<"idiv",0xF7, MRMS7m, Arg16>, Imp<[AX,DX],[AX,DX]>, OpSize; // DX:AX/[mem16] = AX,DX
def IDIVm32: X86Inst<"idiv",0xF7, MRMS7m, Arg32>, Imp<[EAX,EDX],[EAX,EDX]>; // EDX:EAX/[mem32] = EAX,EDX
// Sign-extenders for division
def CBW : X86Inst<"cbw", 0x98, RawFrm, Arg8 >, Imp<[AL],[AH]>; // AX = signext(AL)
@ -249,9 +258,16 @@ let isTwoAddress = 1 in { // Define some helper classes to make defs shorter.
def NEGr8 : I2A8 <"neg", 0xF6, MRMS3r>; // R8 = -R8 = 0-R8
def NEGr16 : I2A16<"neg", 0xF7, MRMS3r>, OpSize; // R16 = -R16 = 0-R16
def NEGr32 : I2A32<"neg", 0xF7, MRMS3r>; // R32 = -R32 = 0-R32
def NEGm8 : I2A8 <"neg", 0xF6, MRMS3m>; // [mem8] = -[mem8] = 0-[mem8]
def NEGm16 : I2A16<"neg", 0xF7, MRMS3m>, OpSize; // [mem16] = -[mem16] = 0-[mem16]
def NEGm32 : I2A32<"neg", 0xF7, MRMS3m>; // [mem32] = -[mem32] = 0-[mem32]
def NOTr8 : I2A8 <"not", 0xF6, MRMS2r>; // R8 = ~R8 = R8^-1
def NOTr16 : I2A16<"not", 0xF7, MRMS2r>, OpSize; // R16 = ~R16 = R16^-1
def NOTr32 : I2A32<"not", 0xF7, MRMS2r>; // R32 = ~R32 = R32^-1
def NOTm8 : I2A8 <"not", 0xF6, MRMS2m>; // [mem8] = ~[mem8] = [mem8^-1]
def NOTm16 : I2A16<"not", 0xF7, MRMS2m>, OpSize; // [mem16] = ~[mem16] = [mem16^-1]
def NOTm32 : I2A32<"not", 0xF7, MRMS2m>; // [mem32] = ~[mem32] = [mem32^-1]
def INCr8 : I2A8 <"inc", 0xFE, MRMS0r>; // ++R8
def INCr16 : I2A16<"inc", 0xFF, MRMS0r>, OpSize; // ++R16
@ -459,9 +475,16 @@ def CMPmi32 : X86Inst<"cmp", 0x81, MRMS7m , Arg32>; // compare [
def MOVSXr16r8 : X86Inst<"movsx", 0xBE, MRMSrcReg, Arg8>, TB, OpSize; // R16 = signext(R8)
def MOVSXr32r8 : X86Inst<"movsx", 0xBE, MRMSrcReg, Arg8>, TB; // R32 = signext(R8)
def MOVSXr32r16: X86Inst<"movsx", 0xBF, MRMSrcReg, Arg8>, TB; // R32 = signext(R16)
def MOVSXr16m8 : X86Inst<"movsx", 0xBE, MRMSrcMem, Arg8>, TB, OpSize; // R16 = signext([mem8])
def MOVSXr32m8 : X86Inst<"movsx", 0xBE, MRMSrcMem, Arg8>, TB; // R32 = signext([mem8])
def MOVSXr32m16: X86Inst<"movsx", 0xBF, MRMSrcMem, Arg8>, TB; // R32 = signext([mem16])
def MOVZXr16r8 : X86Inst<"movzx", 0xB6, MRMSrcReg, Arg8>, TB, OpSize; // R16 = zeroext(R8)
def MOVZXr32r8 : X86Inst<"movzx", 0xB6, MRMSrcReg, Arg8>, TB; // R32 = zeroext(R8)
def MOVZXr32r16: X86Inst<"movzx", 0xB7, MRMSrcReg, Arg8>, TB; // R32 = zeroext(R16)
def MOVZXr16m8 : X86Inst<"movzx", 0xB6, MRMSrcMem, Arg8>, TB, OpSize; // R16 = zeroext([mem8])
def MOVZXr32m8 : X86Inst<"movzx", 0xB6, MRMSrcMem, Arg8>, TB; // R32 = zeroext([mem8])
def MOVZXr32m16: X86Inst<"movzx", 0xB7, MRMSrcMem, Arg8>, TB; // R32 = zeroext([mem16])
//===----------------------------------------------------------------------===//

22
llvm/lib/Target/X86/X86RegisterInfo.cpp
View File

@ -134,6 +134,21 @@ bool X86RegisterInfo::foldMemoryOperand(MachineBasicBlock::iterator &MI,
case X86::MOVri8: NI = MakeMIInst(X86::MOVmi8 , FrameIndex, MI); break;
case X86::MOVri16: NI = MakeMIInst(X86::MOVmi16, FrameIndex, MI); break;
case X86::MOVri32: NI = MakeMIInst(X86::MOVmi32, FrameIndex, MI); break;
case X86::MULr8: NI = MakeMInst(X86::MULm8 , FrameIndex, MI); break;
case X86::MULr16: NI = MakeMInst(X86::MULm16, FrameIndex, MI); break;
case X86::MULr32: NI = MakeMInst(X86::MULm32, FrameIndex, MI); break;
case X86::DIVr8: NI = MakeMInst(X86::DIVm8 , FrameIndex, MI); break;
case X86::DIVr16: NI = MakeMInst(X86::DIVm16, FrameIndex, MI); break;
case X86::DIVr32: NI = MakeMInst(X86::DIVm32, FrameIndex, MI); break;
case X86::IDIVr8: NI = MakeMInst(X86::IDIVm8 , FrameIndex, MI); break;
case X86::IDIVr16: NI = MakeMInst(X86::IDIVm16, FrameIndex, MI); break;
case X86::IDIVr32: NI = MakeMInst(X86::IDIVm32, FrameIndex, MI); break;
case X86::NEGr8: NI = MakeMInst(X86::NEGm8 , FrameIndex, MI); break;
case X86::NEGr16: NI = MakeMInst(X86::NEGm16, FrameIndex, MI); break;
case X86::NEGr32: NI = MakeMInst(X86::NEGm32, FrameIndex, MI); break;
case X86::NOTr8: NI = MakeMInst(X86::NOTm8 , FrameIndex, MI); break;
case X86::NOTr16: NI = MakeMInst(X86::NOTm16, FrameIndex, MI); break;
case X86::NOTr32: NI = MakeMInst(X86::NOTm32, FrameIndex, MI); break;
case X86::INCr8: NI = MakeMInst(X86::INCm8 , FrameIndex, MI); break;
case X86::INCr16: NI = MakeMInst(X86::INCm16, FrameIndex, MI); break;
case X86::INCr32: NI = MakeMInst(X86::INCm32, FrameIndex, MI); break;
@ -191,6 +206,13 @@ bool X86RegisterInfo::foldMemoryOperand(MachineBasicBlock::iterator &MI,
case X86::CMPrr8: NI = MakeRMInst(X86::CMPrm8 , FrameIndex, MI); break;
case X86::CMPrr16: NI = MakeRMInst(X86::CMPrm16, FrameIndex, MI); break;
case X86::CMPrr32: NI = MakeRMInst(X86::CMPrm32, FrameIndex, MI); break;
case X86::MOVSXr16r8: NI = MakeRMInst(X86::MOVSXr16m8 , FrameIndex, MI); break;
case X86::MOVSXr32r8: NI = MakeRMInst(X86::MOVSXr32m8, FrameIndex, MI); break;
case X86::MOVSXr32r16:NI = MakeRMInst(X86::MOVSXr32m16, FrameIndex, MI); break;
case X86::MOVZXr16r8: NI = MakeRMInst(X86::MOVZXr16m8 , FrameIndex, MI); break;
case X86::MOVZXr32r8: NI = MakeRMInst(X86::MOVZXr32m8, FrameIndex, MI); break;
case X86::MOVZXr32r16:NI = MakeRMInst(X86::MOVZXr32m16, FrameIndex, MI); break;
default: break;
}
}