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Sparc: Add the "alternate address space" load/store instructions.

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- Adds support for the asm syntax, which has an immediate integer
  "ASI" (address space identifier) appearing after an address, before
  a comma.

- Adds the various-width load, store, and swap in alternate address
  space instructions. (ldsba, ldsha, lduba, lduha, lda, stba, stha,
  sta, swapa)

This does not attempt to hook these instructions up to pointer address
spaces in LLVM, although that would probably be a reasonable thing to
do in the future.

Differential Revision: http://reviews.llvm.org/D8904

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237581 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
James Y Knight
2015-05-18 16:35:04 +00:00
parent f272788a95
commit ee058202fa
9 changed files with 104 additions and 23 deletions
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11
lib/Target/Sparc/Disassembler/SparcDisassembler.cpp
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@ -279,6 +279,8 @@ static DecodeStatus DecodeMem(MCInst &MI, unsigned insn, uint64_t Address,
unsigned rd = fieldFromInstruction(insn, 25, 5);
unsigned rs1 = fieldFromInstruction(insn, 14, 5);
bool isImm = fieldFromInstruction(insn, 13, 1);
bool hasAsi = fieldFromInstruction(insn, 23, 1); // (in op3 field)
unsigned asi = fieldFromInstruction(insn, 5, 8);
unsigned rs2 = 0;
unsigned simm13 = 0;
if (isImm)
@ -307,6 +309,9 @@ static DecodeStatus DecodeMem(MCInst &MI, unsigned insn, uint64_t Address,
return status;
}
if (hasAsi)
MI.addOperand(MCOperand::createImm(asi));
if (!isLoad) {
status = DecodeRD(MI, rd, Address, Decoder);
if (status != MCDisassembler::Success)
@ -457,6 +462,8 @@ static DecodeStatus DecodeSWAP(MCInst &MI, unsigned insn, uint64_t Address,
unsigned rd = fieldFromInstruction(insn, 25, 5);
unsigned rs1 = fieldFromInstruction(insn, 14, 5);
unsigned isImm = fieldFromInstruction(insn, 13, 1);
bool hasAsi = fieldFromInstruction(insn, 23, 1); // (in op3 field)
unsigned asi = fieldFromInstruction(insn, 5, 8);
unsigned rs2 = 0;
unsigned simm13 = 0;
if (isImm)
@ -482,5 +489,9 @@ static DecodeStatus DecodeSWAP(MCInst &MI, unsigned insn, uint64_t Address,
if (status != MCDisassembler::Success)
return status;
}
if (hasAsi)
MI.addOperand(MCOperand::createImm(asi));
return MCDisassembler::Success;
}