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Add a post encoder method to the VFP instructions to convert them to the Thumb2

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encoding if we're in that mode.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120608 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2010-12-01 21:54:50 +00:00
parent 5177f79c37
commit cf590263cd
3 changed files with 22 additions and 4 deletions
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2
lib/Target/ARM/ARMCodeEmitter.cpp
View File

@ -167,6 +167,8 @@ namespace {
const { return 0; } const { return 0; }
unsigned NEONThumb2DupPostEncoder(const MachineInstr &MI,unsigned Val) unsigned NEONThumb2DupPostEncoder(const MachineInstr &MI,unsigned Val)
const { return 0; } const { return 0; }
unsigned VFPThumb2PostEncoder(const MachineInstr&MI, unsigned Val)
const { return 0; }
unsigned getAdrLabelOpValue(const MachineInstr &MI, unsigned Op) unsigned getAdrLabelOpValue(const MachineInstr &MI, unsigned Op)
const { return 0; } const { return 0; }
unsigned getBranchTargetOpValue(const MachineInstr &MI, unsigned Op) unsigned getBranchTargetOpValue(const MachineInstr &MI, unsigned Op)

6
lib/Target/ARM/ARMInstrFormats.td
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@ -1101,6 +1101,7 @@ class VFPI<dag oops, dag iops, AddrMode am, SizeFlagVal sz,
let InOperandList = !con(iops, (ins pred:$p)); let InOperandList = !con(iops, (ins pred:$p));
let AsmString = !strconcat(opc, "${p}", asm); let AsmString = !strconcat(opc, "${p}", asm);
let Pattern = pattern; let Pattern = pattern;
let PostEncoderMethod = "VFPThumb2PostEncoder";
list<Predicate> Predicates = [HasVFP2]; list<Predicate> Predicates = [HasVFP2];
} }
@ -1115,13 +1116,16 @@ class VFPXI<dag oops, dag iops, AddrMode am, SizeFlagVal sz,
let InOperandList = iops; let InOperandList = iops;
let AsmString = asm; let AsmString = asm;
let Pattern = pattern; let Pattern = pattern;
let PostEncoderMethod = "VFPThumb2PostEncoder";
list<Predicate> Predicates = [HasVFP2]; list<Predicate> Predicates = [HasVFP2];
} }
class VFPAI<dag oops, dag iops, Format f, InstrItinClass itin, class VFPAI<dag oops, dag iops, Format f, InstrItinClass itin,
string opc, string asm, list<dag> pattern> string opc, string asm, list<dag> pattern>
: VFPI<oops, iops, AddrModeNone, Size4Bytes, IndexModeNone, f, itin, : VFPI<oops, iops, AddrModeNone, Size4Bytes, IndexModeNone, f, itin,
opc, asm, "", pattern>; opc, asm, "", pattern> {
let PostEncoderMethod = "VFPThumb2PostEncoder";
}
// ARM VFP addrmode5 loads and stores // ARM VFP addrmode5 loads and stores
class ADI5<bits<4> opcod1, bits<2> opcod2, dag oops, dag iops, class ADI5<bits<4> opcod1, bits<2> opcod2, dag oops, dag iops,

18
lib/Target/ARM/ARMMCCodeEmitter.cpp
View File

@ -249,9 +249,12 @@ public:
unsigned NEONThumb2DataIPostEncoder(const MCInst &MI, unsigned NEONThumb2DataIPostEncoder(const MCInst &MI,
unsigned EncodedValue) const; unsigned EncodedValue) const;
unsigned NEONThumb2LoadStorePostEncoder(const MCInst &MI, unsigned NEONThumb2LoadStorePostEncoder(const MCInst &MI,
unsigned EncodedValue) const; unsigned EncodedValue) const;
unsigned NEONThumb2DupPostEncoder(const MCInst &MI, unsigned NEONThumb2DupPostEncoder(const MCInst &MI,
unsigned EncodedValue) const; unsigned EncodedValue) const;
unsigned VFPThumb2PostEncoder(const MCInst &MI,
unsigned EncodedValue) const;
void EmitByte(unsigned char C, raw_ostream &OS) const { void EmitByte(unsigned char C, raw_ostream &OS) const {
OS << (char)C; OS << (char)C;
@ -324,7 +327,16 @@ unsigned ARMMCCodeEmitter::NEONThumb2DupPostEncoder(const MCInst &MI,
return EncodedValue; return EncodedValue;
} }
/// VFPThumb2PostEncoder - Post-process encoded VFP instructions and rewrite
/// them to their Thumb2 form if we are currently in Thumb2 mode.
unsigned ARMMCCodeEmitter::
VFPThumb2PostEncoder(const MCInst &MI, unsigned EncodedValue) const {
if (TM.getSubtarget<ARMSubtarget>().isThumb2()) {
EncodedValue &= 0x0FFFFFFF;
EncodedValue |= 0xE0000000;
}
return EncodedValue;
}
/// getMachineOpValue - Return binary encoding of operand. If the machine /// getMachineOpValue - Return binary encoding of operand. If the machine
/// operand requires relocation, record the relocation and return zero. /// operand requires relocation, record the relocation and return zero.