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Support Thumb mode encoding of NEON instructions. 

llvm-svn: 107068
This commit is contained in:
Bob Wilson 2010-06-28 21:12:19 +00:00
parent 0a5bb081cc
commit 584387d5e3
1 changed files with 15 additions and 0 deletions
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15
llvm/lib/Target/ARM/ARMCodeEmitter.cpp
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@ -1585,6 +1585,15 @@ static unsigned encodeNEONRm(const MachineInstr &MI, unsigned OpIdx) {
return Binary;
}
/// convertNEONDataProcToThumb - Convert the ARM mode encoding for a NEON
/// data-processing instruction to the corresponding Thumb encoding.
static unsigned convertNEONDataProcToThumb(unsigned Binary) {
assert((Binary & 0xfe000000) == 0xf2000000 &&
"not an ARM NEON data-processing instruction");
unsigned UBit = (Binary >> 24) & 1;
return 0xef000000 | (UBit << 28) | (Binary & 0xffffff);
}
void ARMCodeEmitter::emitNEONGetLaneInstruction(const MachineInstr &MI) {
unsigned Binary = getBinaryCodeForInstr(MI);
@ -1630,6 +1639,8 @@ void ARMCodeEmitter::emitNEON1RegModImmInstruction(const MachineInstr &MI) {
Binary |= (Imm3 << 16);
unsigned Imm4 = Imm & 0xf;
Binary |= Imm4;
if (Subtarget->isThumb())
Binary = convertNEONDataProcToThumb(Binary);
emitWordLE(Binary);
}
@ -1642,6 +1653,8 @@ void ARMCodeEmitter::emitNEON2RegInstruction(const MachineInstr &MI) {
if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
++OpIdx;
Binary |= encodeNEONRm(MI, OpIdx);
if (Subtarget->isThumb())
Binary = convertNEONDataProcToThumb(Binary);
// FIXME: This does not handle VDUPfdf or VDUPfqf.
emitWordLE(Binary);
}
@ -1658,6 +1671,8 @@ void ARMCodeEmitter::emitNEON3RegInstruction(const MachineInstr &MI) {
if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
++OpIdx;
Binary |= encodeNEONRm(MI, OpIdx);
if (Subtarget->isThumb())
Binary = convertNEONDataProcToThumb(Binary);
// FIXME: This does not handle VMOVDneon or VMOVQ.
emitWordLE(Binary);
}