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[/] [openrisc/] [trunk/] [gnu-old/] [gcc-4.2.2/] [gcc/] [sreal.h] - Rev 816
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/* 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