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Fill out support for Thumb2 encodings of NEON instructions.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118854 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson
2010-11-11 23:12:55 +00:00
parent 48bcda4dd6
commit 8f14391314
12 changed files with 553 additions and 0 deletions
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2
lib/Target/ARM/ARMCodeEmitter.cpp
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@@ -165,6 +165,8 @@ namespace {
const { return 0; }
unsigned NEONThumb2LoadStorePostEncoder(const MachineInstr &MI,unsigned Val)
const { return 0; }
unsigned NEONThumb2DupPostEncoder(const MachineInstr &MI,unsigned Val)
const { return 0; }
unsigned getBranchTargetOpValue(const MachineInstr &MI, unsigned Op)
const { return 0; }
unsigned getCCOutOpValue(const MachineInstr &MI, unsigned Op)

2
lib/Target/ARM/ARMInstrFormats.td
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@@ -2046,6 +2046,8 @@ class NVLaneOp<bits<8> opcod1, bits<4> opcod2, bits<2> opcod3,
let Pattern = pattern;
list<Predicate> Predicates = [HasNEON];
string PostEncoderMethod = "NEONThumb2DupPostEncoder";
bits<5> V;
bits<4> R;
bits<4> p;

17
lib/Target/ARM/ARMMCCodeEmitter.cpp
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@@ -176,6 +176,8 @@ public:
unsigned EncodedValue) const;
unsigned NEONThumb2LoadStorePostEncoder(const MCInst &MI,
unsigned EncodedValue) const;
unsigned NEONThumb2DupPostEncoder(const MCInst &MI,
unsigned EncodedValue) const;
void EmitByte(unsigned char C, raw_ostream &OS) const {
OS << (char)C;
@@ -234,6 +236,21 @@ unsigned ARMMCCodeEmitter::NEONThumb2LoadStorePostEncoder(const MCInst &MI,
return EncodedValue;
}
/// NEONThumb2DupPostEncoder - Post-process encoded NEON vdup
/// instructions, and rewrite them to their Thumb2 form if we are currently in
/// Thumb2 mode.
unsigned ARMMCCodeEmitter::NEONThumb2DupPostEncoder(const MCInst &MI,
unsigned EncodedValue) const {
const ARMSubtarget &Subtarget = TM.getSubtarget<ARMSubtarget>();
if (Subtarget.isThumb2()) {
EncodedValue &= 0x00FFFFFF;
EncodedValue |= 0xEE000000;
}
return EncodedValue;
}
/// getMachineOpValue - Return binary encoding of operand. If the machine
/// operand requires relocation, record the relocation and return zero.