[ms] [llvm-ml] Add MASM hex float support

Implement MASM's syntax for specifying floats in raw hexadecimal bytes.

Reviewed By: thakis

Differential Revision: https://reviews.llvm.org/D87401

1 files changed, 5 insertions, 0 deletions

diff --git a/llvm/tools/llvm-mc/llvm-mc.cpp b/llvm/tools/llvm-mc/llvm-mc.cpp
index 66b55ab..f8352f3 100644
--- a/llvm/tools/llvm-mc/llvm-mc.cpp
+++ b/llvm/tools/llvm-mc/llvm-mc.cpp
@@ -169,6 +169,10 @@ static cl::opt<bool> LexMasmIntegers(
     "masm-integers",
     cl::desc("Enable binary and hex masm integers (0b110 and 0ABCh)"));
 
+static cl::opt<bool> LexMasmHexFloats(
+    "masm-hexfloats",
+    cl::desc("Enable MASM-style hex float initializers (3F800000r)"));
+
 static cl::opt<bool> NoExecStack("no-exec-stack",
                                  cl::desc("File doesn't need an exec stack"));
 
@@ -300,6 +304,7 @@ static int AssembleInput(const char *ProgName, const Target *TheTarget,
   Parser->setShowParsedOperands(ShowInstOperands);
   Parser->setTargetParser(*TAP);
   Parser->getLexer().setLexMasmIntegers(LexMasmIntegers);
+  Parser->getLexer().setLexMasmHexFloats(LexMasmHexFloats);
 
   int Res = Parser->Run(NoInitialTextSection);