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[Sparc] Add support to disassemble sparc memory instructions.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202575 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Venkatraman Govindaraju
2014-03-01 07:46:33 +00:00
parent f8bc17fadc
commit 06f2e69c2f
4 changed files with 296 additions and 19 deletions
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110
lib/Target/Sparc/Disassembler/SparcDisassembler.cpp
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@@ -174,6 +174,22 @@ static DecodeStatus DecodeQFPRegsRegisterClass(MCInst &Inst,
return MCDisassembler::Success;
}
static DecodeStatus DecodeLoadInt(MCInst &Inst, unsigned insn, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeLoadFP(MCInst &Inst, unsigned insn, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeLoadDFP(MCInst &Inst, unsigned insn, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeLoadQFP(MCInst &Inst, unsigned insn, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeStoreInt(MCInst &Inst, unsigned insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeStoreFP(MCInst &Inst, unsigned insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeStoreDFP(MCInst &Inst, unsigned insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeStoreQFP(MCInst &Inst, unsigned insn,
uint64_t Address, const void *Decoder);
#include "SparcGenDisassemblerTables.inc"
@@ -226,3 +242,97 @@ SparcDisassembler::getInstruction(MCInst &instr,
return MCDisassembler::Fail;
}
typedef DecodeStatus (*DecodeFunc)(MCInst &MI, unsigned insn, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeMem(MCInst &MI, unsigned insn, uint64_t Address,
const void *Decoder,
bool isLoad, DecodeFunc DecodeRD) {
unsigned rd = fieldFromInstruction(insn, 25, 5);
unsigned rs1 = fieldFromInstruction(insn, 14, 5);
bool isImm = fieldFromInstruction(insn, 13, 1);
unsigned rs2 = 0;
unsigned simm13 = 0;
if (isImm)
simm13 = SignExtend32<13>(fieldFromInstruction(insn, 0, 13));
else
rs2 = fieldFromInstruction(insn, 0, 5);
DecodeStatus status;
if (isLoad) {
status = DecodeRD(MI, rd, Address, Decoder);
if (status != MCDisassembler::Success)
return status;
}
// Decode rs1.
status = DecodeIntRegsRegisterClass(MI, rs1, Address, Decoder);
if (status != MCDisassembler::Success)
return status;
// Decode imm|rs2.
if (isImm)
MI.addOperand(MCOperand::CreateImm(simm13));
else {
status = DecodeIntRegsRegisterClass(MI, rs2, Address, Decoder);
if (status != MCDisassembler::Success)
return status;
}
if (!isLoad) {
status = DecodeRD(MI, rd, Address, Decoder);
if (status != MCDisassembler::Success)
return status;
}
return MCDisassembler::Success;
}
static DecodeStatus DecodeLoadInt(MCInst &Inst, unsigned insn, uint64_t Address,
const void *Decoder) {
return DecodeMem(Inst, insn, Address, Decoder, true,
DecodeIntRegsRegisterClass);
}
static DecodeStatus DecodeLoadFP(MCInst &Inst, unsigned insn, uint64_t Address,
const void *Decoder) {
return DecodeMem(Inst, insn, Address, Decoder, true,
DecodeFPRegsRegisterClass);
}
static DecodeStatus DecodeLoadDFP(MCInst &Inst, unsigned insn, uint64_t Address,
const void *Decoder) {
return DecodeMem(Inst, insn, Address, Decoder, true,
DecodeDFPRegsRegisterClass);
}
static DecodeStatus DecodeLoadQFP(MCInst &Inst, unsigned insn, uint64_t Address,
const void *Decoder) {
return DecodeMem(Inst, insn, Address, Decoder, true,
DecodeQFPRegsRegisterClass);
}
static DecodeStatus DecodeStoreInt(MCInst &Inst, unsigned insn,
uint64_t Address, const void *Decoder) {
return DecodeMem(Inst, insn, Address, Decoder, false,
DecodeIntRegsRegisterClass);
}
static DecodeStatus DecodeStoreFP(MCInst &Inst, unsigned insn, uint64_t Address,
const void *Decoder) {
return DecodeMem(Inst, insn, Address, Decoder, false,
DecodeFPRegsRegisterClass);
}
static DecodeStatus DecodeStoreDFP(MCInst &Inst, unsigned insn,
uint64_t Address, const void *Decoder) {
return DecodeMem(Inst, insn, Address, Decoder, false,
DecodeDFPRegsRegisterClass);
}
static DecodeStatus DecodeStoreQFP(MCInst &Inst, unsigned insn,
uint64_t Address, const void *Decoder) {
return DecodeMem(Inst, insn, Address, Decoder, false,
DecodeQFPRegsRegisterClass);
}