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Simplify printing of ARM shifted immediates.

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Print shifted immediate values directly rather than as a payload+shifter
value pair. This makes for more readable output assembly code, simplifies
the instruction printer, and is consistent with how Thumb immediates are
 displayed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134902 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Grosbach
2011-07-11 16:48:36 +00:00
parent 6e6cdd00aa
commit 589130fac1
12 changed files with 22 additions and 58 deletions
Download Patch File Download Diff File Expand all files Collapse all files

32
lib/Target/ARM/InstPrinter/ARMInstPrinter.cpp
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@@ -126,38 +126,6 @@ void ARMInstPrinter::printOperand(const MCInst *MI, unsigned OpNo,
}
}
static void printSOImm(raw_ostream &O, int64_t V, raw_ostream *CommentStream,
const MCAsmInfo *MAI) {
// Break it up into two parts that make up a shifter immediate.
V = ARM_AM::getSOImmVal(V);
assert(V != -1 && "Not a valid so_imm value!");
unsigned Imm = ARM_AM::getSOImmValImm(V);
unsigned Rot = ARM_AM::getSOImmValRot(V);
// Print low-level immediate formation info, per
// A5.2.3: Data-processing (immediate), and
// A5.2.4: Modified immediate constants in ARM instructions
if (Rot) {
O << "#" << Imm << ", #" << Rot;
// Pretty printed version.
if (CommentStream)
*CommentStream << (int)ARM_AM::rotr32(Imm, Rot) << "\n";
} else {
O << "#" << Imm;
}
}
/// printSOImmOperand - SOImm is 4-bit rotate amount in bits 8-11 with 8-bit
/// immediate in bits 0-7.
void ARMInstPrinter::printSOImmOperand(const MCInst *MI, unsigned OpNum,
raw_ostream &O) {
const MCOperand &MO = MI->getOperand(OpNum);
assert(MO.isImm() && "Not a valid so_imm value!");
printSOImm(O, MO.getImm(), CommentStream, &MAI);
}
// so_reg is a 4-operand unit corresponding to register forms of the A5.1
// "Addressing Mode 1 - Data-processing operands" forms. This includes:
// REG 0 0 - e.g. R5

2
lib/Target/ARM/InstPrinter/ARMInstPrinter.h
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@@ -38,8 +38,6 @@ public:
void printOperand(const MCInst *MI, unsigned OpNo, raw_ostream &O);
void printSOImmOperand(const MCInst *MI, unsigned OpNum, raw_ostream &O);
void printSORegOperand(const MCInst *MI, unsigned OpNum, raw_ostream &O);
void printAddrMode2Operand(const MCInst *MI, unsigned OpNum, raw_ostream &O);