[llvm-commits] CVS: llvm/lib/AsmParser/Lexer.l

[Chris Lattner]

Changes in directory llvm/lib/AsmParser:

Lexer.l updated: 1.30 -> 1.31

---
Log message:

Allow hexadecimal integer constants to be used


---
Diffs of the changes:

Index: llvm/lib/AsmParser/Lexer.l
diff -u llvm/lib/AsmParser/Lexer.l:1.30 llvm/lib/AsmParser/Lexer.l:1.31
--- llvm/lib/AsmParser/Lexer.l:1.30	Wed Apr 16 15:28:31 2003
+++ llvm/lib/AsmParser/Lexer.l	Thu Apr 17 17:17:32 2003
@@ -48,10 +48,7 @@
   return Result;
 }
 
-// HexToFP - Convert the ascii string in hexidecimal format to the floating
-// point representation of it.
-//
-static double HexToFP(const char *Buffer) {
+static uint64_t HexIntToVal(const char *Buffer) {
   uint64_t Result = 0;
   for (; *Buffer; ++Buffer) {
     uint64_t OldRes = Result;
@@ -67,6 +64,15 @@
     if (Result < OldRes)   // Uh, oh, overflow detected!!!
       ThrowException("constant bigger than 64 bits detected!");
   }
+  return Result;
+}
+
+
+// HexToFP - Convert the ascii string in hexidecimal format to the floating
+// point representation of it.
+//
+static double HexToFP(const char *Buffer) {
+  uint64_t Result = HexIntToVal(Buffer);
 
   assert(sizeof(double) == sizeof(Result) &&
          "Data sizes incompatible on this target!");
@@ -142,6 +148,11 @@
  *  hexadecimal number for when exponential notation is not precise enough.
  */
 HexFPConstant 0x[0-9A-Fa-f]+
+
+/* HexIntConstant - Hexadecimal constant generated by the CFE to avoid forcing
+ * it to deal with 64 bit numbers.
+ */
+HexIntConstant [us]0x[0-9A-Fa-f]+
 %%
 
 {Comment}       { /* Ignore comments for now */ }
@@ -249,7 +260,10 @@
                   llvmAsmlval.SInt64Val = -Val; 
 		  return ESINT64VAL; 
                 }
-
+{HexIntConstant} {
+                   llvmAsmlval.UInt64Val = HexIntToVal(yytext+3); 
+                   return yytext[0] == 's' ? ESINT64VAL : EUINT64VAL;
+                 }
 
 {EPInteger}     { llvmAsmlval.UIntVal = atoull(yytext+1); return UINTVAL; }
 {ENInteger}     {