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Encoding T1 (tBcc)
if cond == '1110' then UNDEFINED;

rdar://problem/9268681


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129325 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Johnny Chen 2011-04-12 00:14:49 +00:00
parent dac5dbadeb
commit e77f72d7d2
2 changed files with 15 additions and 0 deletions
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5
lib/Target/ARM/Disassembler/ThumbDisassemblerCore.h
View File

@ -951,6 +951,11 @@ static bool DisassembleThumb1CondBr(MCInst &MI, unsigned Opcode, uint32_t insn,
: (int)Imm8));
// Predicate operands by ARMBasicMCBuilder::TryPredicateAndSBitModifier().
// But note that for tBcc, if cond = '1110' then UNDEFINED.
if (Opcode == ARM::tBcc && slice(insn, 11, 8) == 14) {
DEBUG(errs() << "if cond = '1110' then UNDEFINED\n");
return false;
}
NumOpsAdded = 1;
return true;

10
test/MC/Disassembler/ARM/invalid-Bcc-thumb.txt Normal file
View File

@ -0,0 +1,10 @@
# RUN: llvm-mc --disassemble %s -triple=thumb-apple-darwin9 |& grep {invalid instruction encoding}
# Opcode=2249 Name=tBcc Format=ARM_FORMAT_THUMBFRM(25)
# 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
# -------------------------------------------------------------------------------------------------
# | 0: 0: 0: 0| 0: 0: 0: 0| 0: 0: 0: 0| 0: 0: 0: 0| 1: 1: 0: 1| 1: 1: 1: 0| 0: 1: 1: 0| 1: 1: 1: 1|
# -------------------------------------------------------------------------------------------------
#
# if cond = '1110' then UNDEFINED
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