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[ARM] SSAT/USAT with an 'asr #32' shift should result in an undefined encoding rather than unpredictable

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llvm-svn: 226469
This commit is contained in:
Bradley Smith 2015-01-19 16:37:17 +00:00
parent 7561d7842c
commit ae052a6630
2 changed files with 5 additions and 2 deletions
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2
lib/Target/ARM/Disassembler/ARMDisassembler.cpp
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@ -4971,7 +4971,7 @@ static DecodeStatus DecodeT2ShifterImmOperand(MCInst &Inst, uint32_t Val,
DecodeStatus S = MCDisassembler::Success;
// Shift of "asr #32" is not allowed in Thumb2 mode.
if (Val == 0x20) S = MCDisassembler::SoftFail;
if (Val == 0x20) S = MCDisassembler::Fail;
Inst.addOperand(MCOperand::CreateImm(Val));
return S;
}

5
test/MC/ARM/thumb2-diagnostics.s
View File

@ -87,4 +87,7 @@ foo2:
@ CHECK-ERRORS: error: invalid operand for instruction
@ CHECK-ERRORS: error: invalid operand for instruction
ssat r0, #1, r0, asr #32
usat r0, #1, r0, asr #32
@ CHECK-ERRORS: error: 'asr #32' shift amount not allowed in Thumb mode
@ CHECK-ERRORS: error: 'asr #32' shift amount not allowed in Thumb mode