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[mips][microMIPSr6] Implement disassembler support 

Implement disassembler support for microMIPS32r6.

Differential Revision: http://reviews.llvm.org/D8490

llvm-svn: 235307
This commit is contained in:
Jozef Kolek 2015-04-20 14:40:38 +00:00
parent 97df86ceb1
commit 676d60125c
3 changed files with 20 additions and 4 deletions
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15
llvm/lib/Target/Mips/Disassembler/MipsDisassembler.cpp
View File

@ -837,10 +837,17 @@ DecodeStatus MipsDisassembler::getInstruction(MCInst &Instr, uint64_t &Size,
if (Result == MCDisassembler::Fail)
return MCDisassembler::Fail;
DEBUG(dbgs() << "Trying MicroMips32 table (32-bit instructions):\n");
// Calling the auto-generated decoder function.
Result = decodeInstruction(DecoderTableMicroMips32, Instr, Insn, Address,
this, STI);
if (hasMips32r6()) {
DEBUG(dbgs() << "Trying MicroMips32r632 table (32-bit instructions):\n");
// Calling the auto-generated decoder function.
Result = decodeInstruction(DecoderTableMicroMips32r632, Instr, Insn, Address,
this, STI);
} else {
DEBUG(dbgs() << "Trying MicroMips32 table (32-bit instructions):\n");
// Calling the auto-generated decoder function.
Result = decodeInstruction(DecoderTableMicroMips32, Instr, Insn, Address,
this, STI);
}
if (Result != MCDisassembler::Fail) {
Size = 4;
return Result;

2
llvm/lib/Target/Mips/MicroMips32r6InstrInfo.td
View File

@ -46,5 +46,7 @@ class BC_MMR6_DESC : BC_MMR6_DESC_BASE<"bc", brtarget26>;
//
//===----------------------------------------------------------------------===//
let DecoderNamespace = "MicroMips32r6" in {
def BALC_MMR6 : R6MMR6Rel, BALC_MMR6_ENC, BALC_MMR6_DESC, ISA_MICROMIPS32R6;
def BC_MMR6 : R6MMR6Rel, BC_MMR6_ENC, BC_MMR6_DESC, ISA_MICROMIPS32R6;
}

7
llvm/test/MC/Disassembler/Mips/micromips32r6.txt Normal file
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@ -0,0 +1,7 @@
# RUN: llvm-mc --disassemble %s -triple=mips-unknown-linux -mcpu=mips32r6 -mattr=micromips | FileCheck %s
# CHECK: balc 14572256
0xb4 0x37 0x96 0xb8
# CHECK: bc 14572256
0x94 0x37 0x96 0xb8