real.h (struct real_value): Use the same type for all bitfields.

* real.h (struct real_value): Use the same type for all
bitfields.  Rename exp to uexp.
(REAL_EXP, SET_REAL_EXP): New accessor macros for uexp.
Adjust all uses of exp...
* builtins.c: ... here, ...
* emit-rtl.c: ... here, and ...
* real.c: ... and here.

From-SVN: r79802

1 files changed, 11 insertions, 2 deletions

diff --git a/gcc/real.h b/gcc/real.h
index 3ff0356..475ab45 100644
--- a/gcc/real.h
+++ b/gcc/real.h
@@ -42,14 +42,23 @@ enum real_value_class {
 
 struct real_value GTY(())
 {
-  ENUM_BITFIELD (real_value_class) class : 2;
+  /* Use the same underlying type for all bit-fields, so as to make
+     sure they're packed together, otherwise REAL_VALUE_TYPE_SIZE will
+     be miscomputed.  */
+  unsigned int /* ENUM_BITFIELD (real_value_class) */ class : 2;
   unsigned int sign : 1;
   unsigned int signalling : 1;
   unsigned int canonical : 1;
-  signed int exp : EXP_BITS;
+  unsigned int uexp : EXP_BITS;
   unsigned long sig[SIGSZ];
 };
 
+#define REAL_EXP(REAL) \
+  ((int)((REAL)->uexp ^ (unsigned int)(1 << (EXP_BITS - 1))) \
+   - (1 << (EXP_BITS - 1)))
+#define SET_REAL_EXP(REAL, EXP) \
+  ((REAL)->uexp = ((unsigned int)(EXP) & (unsigned int)((1 << EXP_BITS) - 1)))
+
 /* Various headers condition prototypes on #ifdef REAL_VALUE_TYPE, so it
    needs to be a macro.  We do need to continue to have a structure tag
    so that other headers can forward declare it.  */