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Use a small table instead of macros to do this conversion.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27769 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2006-04-17 20:59:25 +00:00
parent c575ca22ea
commit f7d2372b74
1 changed files with 13 additions and 10 deletions
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23
lib/Target/PowerPC/PPCRegisterInfo.cpp
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@ -295,21 +295,24 @@ PPCRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II) const {
}
}
/// VRRegNo - Map from a numbered VR register to its enum value.
///
static const unsigned short VRRegNo[] = {
PPC::V0 , PPC::V1 , PPC::V2 , PPC::V3 , PPC::V4 , PPC::V5 , PPC::V6 , PPC::V7 ,
PPC::V8 , PPC::V9 , PPC::V10, PPC::V11, PPC::V12, PPC::V13, PPC::V14, PPC::V15,
PPC::V16, PPC::V17, PPC::V18, PPC::V19, PPC::V20, PPC::V21, PPC::V22, PPC::V23,
PPC::V24, PPC::V25, PPC::V26, PPC::V27, PPC::V28, PPC::V29, PPC::V30, PPC::V31
};
// HandleVRSaveUpdate - MI is the UPDATE_VRSAVE instruction introduced by the
// instruction selector. Based on the vector registers that have been used,
// transform this into the appropriate ORI instruction.
static void HandleVRSaveUpdate(MachineInstr *MI, const bool *UsedRegs) {
unsigned UsedRegMask = 0;
#define HANDLEREG(N) if (UsedRegs[PPC::V##N]) UsedRegMask |= 1 << (31-N)
HANDLEREG( 0); HANDLEREG( 1); HANDLEREG( 2); HANDLEREG( 3);
HANDLEREG( 4); HANDLEREG( 5); HANDLEREG( 6); HANDLEREG( 7);
HANDLEREG( 8); HANDLEREG( 9); HANDLEREG(10); HANDLEREG(11);
HANDLEREG(12); HANDLEREG(13); HANDLEREG(14); HANDLEREG(15);
HANDLEREG(16); HANDLEREG(17); HANDLEREG(18); HANDLEREG(19);
HANDLEREG(20); HANDLEREG(21); HANDLEREG(22); HANDLEREG(23);
HANDLEREG(24); HANDLEREG(25); HANDLEREG(26); HANDLEREG(27);
HANDLEREG(28); HANDLEREG(29); HANDLEREG(30); HANDLEREG(31);
#undef HANDLEREG
for (unsigned i = 0; i != 32; ++i)
if (UsedRegs[VRRegNo[i]])
UsedRegMask |= 1 << (31-i);
unsigned SrcReg = MI->getOperand(1).getReg();
unsigned DstReg = MI->getOperand(0).getReg();
// If no registers are used, turn this into a copy.