m68k.c (standard_68881_constant_p): Don't accept -0.0 as valid 68881 constant.

        * m68k.c (standard_68881_constant_p): Don't accept -0.0 as valid
        68881 constant.

From-SVN: r26964

gcc/ChangeLog

@@ -5,6 +5,9 @@ Mon May 17 01:57:37 1999  David Daney <daney@ibw.com.ni>
 
 1999-05-17  Andreas Schwab  <schwab@issan.cs.uni-dortmund.de>
 
+	* m68k.c (standard_68881_constant_p): Don't accept -0.0 as valid
+	68881 constant.
+
 	* fold-const.c (fold_truthop): When converting a one-bit
 	comparison don't sign extend the constant.
 

gcc/config/m68k/m68k.c

@@ -2460,9 +2460,11 @@ standard_68881_constant_p (x)
 
   REAL_VALUE_FROM_CONST_DOUBLE (r, x);
 
+  /* Use REAL_VALUES_IDENTICAL instead of REAL_VALUES_EQUAL so that -0.0
+     is rejected.  */
   for (i = 0; i < 6; i++)
     {
-      if (REAL_VALUES_EQUAL (r, values_68881[i]))
+      if (REAL_VALUES_IDENTICAL (r, values_68881[i]))
         return (codes_68881[i]);
     }