Add support for printing out floating point values from the ARM assembly

parser. The parser will always give us a binary representation of the floating
point number.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124318 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/ARM/InstPrinter/ARMInstPrinter.cpp b/lib/Target/ARM/InstPrinter/ARMInstPrinter.cpp
index 820c2e6ca6f919af9e74630d9d6111d24af530e8..941c69d14ea182e8f0fcb4cc3c1811ddd3852477 100644 (file)
--- a/lib/Target/ARM/InstPrinter/ARMInstPrinter.cpp
+++ b/lib/Target/ARM/InstPrinter/ARMInstPrinter.cpp
@@ -673,12 +673,37 @@ void ARMInstPrinter::printT2AddrModeSoRegOperand(const MCInst *MI,
 
 void ARMInstPrinter::printVFPf32ImmOperand(const MCInst *MI, unsigned OpNum,
                                            raw_ostream &O) {
-  O << '#' << (float)MI->getOperand(OpNum).getFPImm();
+  const MCOperand &MO = MI->getOperand(OpNum);
+  O << '#';
+  if (MO.isFPImm()) {
+    O << (float)MO.getFPImm();
+  } else {
+    union {
+      uint32_t I;
+      float F;
+    } FPUnion;
+
+    FPUnion.I = MO.getImm();
+    O << FPUnion.F;
+  }
 }
 
 void ARMInstPrinter::printVFPf64ImmOperand(const MCInst *MI, unsigned OpNum,
                                            raw_ostream &O) {
-  O << '#' << MI->getOperand(OpNum).getFPImm();
+  const MCOperand &MO = MI->getOperand(OpNum);
+  O << '#';
+  if (MO.isFPImm()) {
+    O << MO.getFPImm();
+  } else {
+    // We expect the binary encoding of a floating point number here.
+    union {
+      uint64_t I;
+      double D;
+    } FPUnion;
+
+    FPUnion.I = MO.getImm();
+    O << FPUnion.D;
+  }
 }
 
 void ARMInstPrinter::printNEONModImmOperand(const MCInst *MI, unsigned OpNum,