Imported gcc-4.4.3

[msp430-gcc.git] / gcc / sreal.h

diff --git a/gcc/sreal.h b/gcc/sreal.h
new file mode 100644 (file)
index 0000000..329d677
--- /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