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| author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
|---|---|---|
| committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
| commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
| tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /gcc/sreal.h | |
| download | cbb-gcc-4.6.4-upstream.tar.bz2 cbb-gcc-4.6.4-upstream.tar.xz | |
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Diffstat (limited to 'gcc/sreal.h')
| -rw-r--r-- | gcc/sreal.h | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/gcc/sreal.h b/gcc/sreal.h new file mode 100644 index 000000000..329d6771a --- /dev/null +++ b/gcc/sreal.h @@ -0,0 +1,64 @@ +/* Definitions for simple data type for positive real numbers. + Copyright (C) 2002, 2003, 2007 Free Software Foundation, Inc. + +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 3, or (at your option) any later +version. + +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 GCC; see the file COPYING3. If not see +<http://www.gnu.org/licenses/>. */ + +#ifndef GCC_SREAL_H +#define GCC_SREAL_H + +/* SREAL_PART_BITS has to be an even number. */ +#if (HOST_BITS_PER_WIDE_INT / 2) % 2 == 1 +#define SREAL_PART_BITS (HOST_BITS_PER_WIDE_INT / 2 - 1) +#else +#define SREAL_PART_BITS (HOST_BITS_PER_WIDE_INT / 2) +#endif + +#define uhwi unsigned HOST_WIDE_INT +#define MAX_HOST_WIDE_INT (((uhwi) 1 << (HOST_BITS_PER_WIDE_INT - 1)) - 1) + +#define SREAL_MIN_SIG ((uhwi) 1 << (SREAL_PART_BITS - 1)) +#define SREAL_MAX_SIG (((uhwi) 1 << SREAL_PART_BITS) - 1) +#define SREAL_MAX_EXP (INT_MAX / 4) + +#if SREAL_PART_BITS < 32 +#define SREAL_BITS (SREAL_PART_BITS * 2) +#else +#define SREAL_BITS SREAL_PART_BITS +#endif + +/* Structure for holding a simple real number. */ +typedef struct sreal +{ +#if SREAL_PART_BITS < 32 + unsigned HOST_WIDE_INT sig_lo; /* Significant (lower part). */ + unsigned HOST_WIDE_INT sig_hi; /* Significant (higher part). */ +#else + unsigned HOST_WIDE_INT sig; /* Significant. */ +#endif + signed int exp; /* Exponent. */ +} sreal; + +extern void dump_sreal (FILE *, sreal *); +extern sreal *sreal_init (sreal *, unsigned HOST_WIDE_INT, signed int); +extern HOST_WIDE_INT sreal_to_int (sreal *); +extern int sreal_compare (sreal *, sreal *); +extern sreal *sreal_add (sreal *, sreal *, sreal *); +extern sreal *sreal_sub (sreal *, sreal *, sreal *); +extern sreal *sreal_mul (sreal *, sreal *, sreal *); +extern sreal *sreal_div (sreal *, sreal *, sreal *); + +#endif |