RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2024-11-24 19:52:54 +01:00
Code Issues Projects Releases Wiki Activity

Thumb parsing and encoding for RSB.

Browse Source 
llvm-svn: 138308
This commit is contained in:
Jim Grosbach 2011-08-22 23:47:13 +00:00
parent 33f3f4ec2a
commit 5ae40d73a6
2 changed files with 21 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
lib/Target/ARM/AsmParser/ARMAsmParser.cpp
View File

@ -3029,6 +3029,19 @@ bool ARMAsmParser::ParseInstruction(StringRef Name, SMLoc NameLoc,
delete Op;
}
}
// Similarly, the Thumb1 "RSB" instruction has a literal "#0" on the
// end. Convert it to a token here.
if (Mnemonic == "rsb" && isThumb() && Operands.size() == 6 &&
static_cast<ARMOperand*>(Operands[5])->isImm()) {
ARMOperand *Op = static_cast<ARMOperand*>(Operands[5]);
const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Op->getImm());
if (CE && CE->getValue() == 0) {
Operands.erase(Operands.begin() + 5);
Operands.push_back(ARMOperand::CreateToken("#0", Op->getStartLoc()));
delete Op;
}
}
return false;
}

8
test/MC/ARM/basic-thumb-instructions.s
View File

@ -399,3 +399,11 @@ _func:
rors r2, r7
@ CHECK: rors r2, r7 @ encoding: [0xfa,0x41]
@------------------------------------------------------------------------------
@ RSB
@------------------------------------------------------------------------------
rsbs r1, r3, #0
rsbs r1, r3, #0 @ encoding: [0x59,0x42]