6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-09-28 07:17:32 +00:00
Code Issues Projects Releases Wiki Activity

Support Thumb mode encoding of NEON instructions.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107068 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bob Wilson
2010-06-28 21:12:19 +00:00
parent c25ccf85e5
commit d896a97dc7
1 changed files with 15 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
lib/Target/ARM/ARMCodeEmitter.cpp
View File

@@ -1585,6 +1585,15 @@ static unsigned encodeNEONRm(const MachineInstr &MI, unsigned OpIdx) {
return Binary; 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) { void ARMCodeEmitter::emitNEONGetLaneInstruction(const MachineInstr &MI) {
unsigned Binary = getBinaryCodeForInstr(MI); unsigned Binary = getBinaryCodeForInstr(MI);
@@ -1630,6 +1639,8 @@ void ARMCodeEmitter::emitNEON1RegModImmInstruction(const MachineInstr &MI) {
Binary |= (Imm3 << 16); Binary |= (Imm3 << 16);
unsigned Imm4 = Imm & 0xf; unsigned Imm4 = Imm & 0xf;
Binary |= Imm4; Binary |= Imm4;
if (Subtarget->isThumb())
Binary = convertNEONDataProcToThumb(Binary);
emitWordLE(Binary); emitWordLE(Binary);
} }
@@ -1642,6 +1653,8 @@ void ARMCodeEmitter::emitNEON2RegInstruction(const MachineInstr &MI) {
if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1) if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
++OpIdx; ++OpIdx;
Binary |= encodeNEONRm(MI, OpIdx); Binary |= encodeNEONRm(MI, OpIdx);
if (Subtarget->isThumb())
Binary = convertNEONDataProcToThumb(Binary);
// FIXME: This does not handle VDUPfdf or VDUPfqf. // FIXME: This does not handle VDUPfdf or VDUPfqf.
emitWordLE(Binary); emitWordLE(Binary);
} }
@@ -1658,6 +1671,8 @@ void ARMCodeEmitter::emitNEON3RegInstruction(const MachineInstr &MI) {
if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1) if (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1)
++OpIdx; ++OpIdx;
Binary |= encodeNEONRm(MI, OpIdx); Binary |= encodeNEONRm(MI, OpIdx);
if (Subtarget->isThumb())
Binary = convertNEONDataProcToThumb(Binary);
// FIXME: This does not handle VMOVDneon or VMOVQ. // FIXME: This does not handle VMOVDneon or VMOVQ.
emitWordLE(Binary); emitWordLE(Binary);
} }