/* This is a software floating point library which can be used
for targets without hardware floating point.
Copyright (C) 1994, 1995, 1996, 1997, 1998, 2000, 2001, 2002, 2003,
- 2004, 2005 Free Software Foundation, Inc.
+ 2004, 2005, 2008, 2009 Free Software Foundation, Inc.
-This file is free software; you can redistribute it and/or modify it
-under the terms of the GNU General Public License as published by the
-Free Software Foundation; either version 2, or (at your option) any
-later version.
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 2, or (at your option) any later
+version.
In addition to the permissions in the GNU General Public License, the
Free Software Foundation gives you unlimited permission to link the
-compiled version of this file with other programs, and to distribute
-those programs without any restriction coming from the use of this
-file. (The General Public License restrictions do apply in other
-respects; for example, they cover modification of the file, and
-distribution when not linked into another program.)
-
-This file is distributed in the hope that it will be useful, but
-WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-General Public License for more details.
+compiled version of this file into combinations with other programs,
+and to distribute those combinations without any restriction coming
+from the use of this file. (The General Public License restrictions
+do apply in other respects; for example, they cover modification of
+the file, and distribution when not linked into a combine
+executable.)
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
You should have received a copy of the GNU General Public License
-along with this program; see the file COPYING. If not, write to
-the Free Software Foundation, 51 Franklin Street, Fifth Floor,
-Boston, MA 02110-1301, USA. */
-
-/* As a special exception, if you link this library with other files,
- some of which are compiled with GCC, to produce an executable,
- this library does not by itself cause the resulting executable
- to be covered by the GNU General Public License.
- This exception does not however invalidate any other reasons why
- the executable file might be covered by the GNU General Public License. */
+along with GCC; see the file COPYING. If not, write to the Free
+Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301, USA. */
/* This implements IEEE 754 format arithmetic, but does not provide a
mechanism for setting the rounding mode, or for generating or handling
#endif
INLINE
-static fp_number_type *
-nan (void)
+static const fp_number_type *
+makenan (void)
{
- /* Discard the const qualifier... */
#ifdef TFLOAT
- return (fp_number_type *) (& __thenan_tf);
+ return & __thenan_tf;
#elif defined FLOAT
- return (fp_number_type *) (& __thenan_sf);
+ return & __thenan_sf;
#else
- return (fp_number_type *) (& __thenan_df);
+ return & __thenan_df;
#endif
}
INLINE
static int
-isnan ( fp_number_type * x)
+isnan (const fp_number_type *x)
{
return __builtin_expect (x->class == CLASS_SNAN || x->class == CLASS_QNAN,
0);
INLINE
static int
-isinf ( fp_number_type * x)
+isinf (const fp_number_type * x)
{
return __builtin_expect (x->class == CLASS_INFINITY, 0);
}
INLINE
static int
-iszero ( fp_number_type * x)
+iszero (const fp_number_type * x)
{
return x->class == CLASS_ZERO;
}
return __clzsi2 (n);
}
-extern FLO_type pack_d ( fp_number_type * );
+extern FLO_type pack_d (const fp_number_type * );
#if defined(L_pack_df) || defined(L_pack_sf) || defined(L_pack_tf)
FLO_type
-pack_d ( fp_number_type * src)
+pack_d (const fp_number_type *src)
{
FLO_union_type dst;
fractype fraction = src->fraction.ll; /* wasn't unsigned before? */
#endif /* L_unpack_df || L_unpack_sf */
#if defined(L_addsub_sf) || defined(L_addsub_df) || defined(L_addsub_tf)
-static fp_number_type *
+static const fp_number_type *
_fpadd_parts (fp_number_type * a,
fp_number_type * b,
fp_number_type * tmp)
{
/* Adding infinities with opposite signs yields a NaN. */
if (isinf (b) && a->sign != b->sign)
- return nan ();
+ return makenan ();
return a;
}
if (isinf (b))
tmp->normal_exp++;
}
return tmp;
-
}
FLO_type
fp_number_type a;
fp_number_type b;
fp_number_type tmp;
- fp_number_type *res;
+ const fp_number_type *res;
FLO_union_type au, bu;
au.value = arg_a;
fp_number_type a;
fp_number_type b;
fp_number_type tmp;
- fp_number_type *res;
+ const fp_number_type *res;
FLO_union_type au, bu;
au.value = arg_a;
#endif /* L_addsub_sf || L_addsub_df */
#if defined(L_mul_sf) || defined(L_mul_df) || defined(L_mul_tf)
-static inline __attribute__ ((__always_inline__)) fp_number_type *
+static inline __attribute__ ((__always_inline__)) const fp_number_type *
_fpmul_parts ( fp_number_type * a,
fp_number_type * b,
fp_number_type * tmp)
if (isinf (a))
{
if (iszero (b))
- return nan ();
+ return makenan ();
a->sign = a->sign != b->sign;
return a;
}
{
if (iszero (a))
{
- return nan ();
+ return makenan ();
}
b->sign = a->sign != b->sign;
return b;
fp_number_type a;
fp_number_type b;
fp_number_type tmp;
- fp_number_type *res;
+ const fp_number_type *res;
FLO_union_type au, bu;
au.value = arg_a;
#endif /* L_mul_sf || L_mul_df || L_mul_tf */
#if defined(L_div_sf) || defined(L_div_df) || defined(L_div_tf)
-static inline __attribute__ ((__always_inline__)) fp_number_type *
+static inline __attribute__ ((__always_inline__)) const fp_number_type *
_fpdiv_parts (fp_number_type * a,
fp_number_type * b)
{
if (isinf (a) || iszero (a))
{
if (a->class == b->class)
- return nan ();
+ return makenan ();
return a;
}
{
fp_number_type a;
fp_number_type b;
- fp_number_type *res;
+ const fp_number_type *res;
FLO_union_type au, bu;
au.value = arg_a;
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