gcc/gcc/sreal.h
Josef Zlomek ac5e69da56 Makefile.in (sreal.o): Added.
* Makefile.in (sreal.o): Added.
	(predict.o): Depends on sreal.h instead of real.h.
	* sreal.c: New file.
	* sreal.h: New file.
	* predict.c: Use sreal.c instead of real.c.

From-SVN: r62630
2003-02-10 12:34:24 +00:00

68 lines
2.2 KiB
C

/* Definitions for simple data type for positive real numbers.
Copyright (C) 2002 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 PARAMS ((FILE *, sreal *));
extern sreal *sreal_init PARAMS ((sreal *,
unsigned HOST_WIDE_INT,
signed int));
extern HOST_WIDE_INT sreal_to_int PARAMS ((sreal *));
extern int sreal_compare PARAMS ((sreal *, sreal *));
extern sreal *sreal_add PARAMS ((sreal *, sreal *, sreal *));
extern sreal *sreal_sub PARAMS ((sreal *, sreal *, sreal *));
extern sreal *sreal_mul PARAMS ((sreal *, sreal *, sreal *));
extern sreal *sreal_div PARAMS ((sreal *, sreal *, sreal *));
#endif