| /* Definitions for simple data type for positive real numbers. |
| Copyright (C) 2002, 2003 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 2, 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 COPYING. If not, write to the Free |
| Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
| 02111-1307, USA. */ |
| |
| #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 |