* config/cpu/s390/atomicity.h (__exchange_and_add): Add "memory"

[pf3gnuchains/gcc-fork.git] / gcc / real.h

diff --git a/gcc/real.h b/gcc/real.h
index 475ab45..9e52c6d 100644 (file)
--- a/gcc/real.h
+++ b/gcc/real.h
@@ -1,6 +1,6 @@
 /* Definitions of floating-point access for GNU compiler.
    Copyright (C) 1989, 1991, 1994, 1996, 1997, 1998, 1999,
-   2000, 2002, 2003, 2004 Free Software Foundation, Inc.
+   2000, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
 
    This file is part of GCC.
 
@@ -45,7 +45,7 @@ struct real_value GTY(())
   /* 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 /* ENUM_BITFIELD (real_value_class) */ cl : 2;
   unsigned int sign : 1;
   unsigned int signalling : 1;
   unsigned int canonical : 1;
@@ -138,8 +138,13 @@ struct real_format
   /* The maximum integer, x, such that b**(x-1) is representable.  */
   int emax;
 
-  /* The bit position of the sign bit, or -1 for a complex encoding.  */
-  int signbit;
+  /* The bit position of the sign bit, for determining whether a value
+     is positive/negative, or -1 for a complex encoding.  */
+  int signbit_ro;
+
+  /* The bit position of the sign bit, for changing the sign of a number,
+     or -1 for a complex encoding.  */
+  int signbit_rw;
 
   /* Properties of the format.  */
   bool has_nans;
@@ -157,10 +162,16 @@ extern const struct real_format *
 
 #define REAL_MODE_FORMAT(MODE) (real_format_for_mode[(MODE) - MIN_MODE_FLOAT])
 
+/* The following macro determines whether the floating point format is
+   composite, i.e. may contain non-consecutive mantissa bits, in which
+   case compile-time FP overflow may not model run-time overflow.  */
+#define REAL_MODE_FORMAT_COMPOSITE_P(MODE) \
+       ((REAL_MODE_FORMAT(MODE))->pnan < (REAL_MODE_FORMAT (MODE))->p)
+
 /* Declare functions in real.c.  */
 
 /* Binary or unary arithmetic on tree_code.  */
-extern void real_arithmetic (REAL_VALUE_TYPE *, int, const REAL_VALUE_TYPE *,
+extern bool real_arithmetic (REAL_VALUE_TYPE *, int, const REAL_VALUE_TYPE *,
                             const REAL_VALUE_TYPE *);
 
 /* Compare reals by tree_code.  */
@@ -384,4 +395,7 @@ extern void real_ceil (REAL_VALUE_TYPE *, enum machine_mode,
 extern void real_round (REAL_VALUE_TYPE *, enum machine_mode,
                        const REAL_VALUE_TYPE *);
 
+/* Set the sign of R to the sign of X.  */
+extern void real_copysign (REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *);
+
 #endif /* ! GCC_REAL_H */