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Added Thumb IT instruction.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75198 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2009-07-09 23:43:36 +00:00
parent 2202360734
commit e5564748b7
2 changed files with 25 additions and 0 deletions
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9
lib/Target/ARM/ARMInstrThumb.td
View File

@ -66,6 +66,11 @@ def thumb_immshifted_shamt : SDNodeXForm<imm, [{
return CurDAG->getTargetConstant(V, MVT::i32);
}]>;
// IT block condition mask
def it_mask : Operand<i32> {
let PrintMethod = "printThumbITMask";
}
// Define Thumb specific addressing modes.
// t_addrmode_rr := reg + reg
@ -207,6 +212,10 @@ let isBranch = 1, isTerminator = 1 in
def tBcc : T1I<(outs), (ins brtarget:$target, pred:$cc), "b$cc $target",
[/*(ARMbrcond bb:$target, imm:$cc)*/]>;
// IT block
def tIT : TI<(outs), (ins pred:$cc, it_mask:$mask),
"it$mask $cc", []>;
//===----------------------------------------------------------------------===//
// Load Store Instructions.
//

16
lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp
View File

@ -111,6 +111,7 @@ namespace {
const char *Modifier = 0);
void printBitfieldInvMaskImmOperand (const MachineInstr *MI, int OpNum);
void printThumbITMask(const MachineInstr *MI, int OpNum);
void printThumbAddrModeRROperand(const MachineInstr *MI, int OpNum);
void printThumbAddrModeRI5Operand(const MachineInstr *MI, int OpNum,
unsigned Scale);
@ -635,6 +636,21 @@ ARMAsmPrinter::printBitfieldInvMaskImmOperand(const MachineInstr *MI, int Op) {
//===--------------------------------------------------------------------===//
void
ARMAsmPrinter::printThumbITMask(const MachineInstr *MI, int Op) {
// (3 - the number of trailing zeros) is the number of then / else.
unsigned Mask = MI->getOperand(Op).getImm();
unsigned NumTZ = CountTrailingZeros_32(Mask);
assert(NumTZ <= 3 && "Invalid IT mask!");
for (unsigned Pos = 3, e = NumTZ; Pos >= e; --Pos) {
bool T = (Mask & (1 << Pos)) != 0;
if (T)
O << 't';
else
O << 'e';
}
}
void
ARMAsmPrinter::printThumbAddrModeRROperand(const MachineInstr *MI, int Op) {
const MachineOperand &MO1 = MI->getOperand(Op);