1 /* Floating point definitions for GDB. 2 3 Copyright 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 4 1996, 1997, 1998, 1999, 2000, 2001, 2003 Free Software Foundation, 5 Inc. 6 7 This file is part of GDB. 8 9 This program is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 2 of the License, or 12 (at your option) any later version. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program; if not, write to the Free Software 21 Foundation, Inc., 59 Temple Place - Suite 330, 22 Boston, MA 02111-1307, USA. */ 23 24 #ifndef DOUBLEST_H 25 #define DOUBLEST_H 26 27 struct type; 28 struct floatformat; 29 30 /* Setup definitions for host and target floating point formats. We need to 31 consider the format for `float', `double', and `long double' for both target 32 and host. We need to do this so that we know what kind of conversions need 33 to be done when converting target numbers to and from the hosts DOUBLEST 34 data type. */ 35 36 /* This is used to indicate that we don't know the format of the floating point 37 number. Typically, this is useful for native ports, where the actual format 38 is irrelevant, since no conversions will be taking place. */ 39 40 #include "floatformat.h" /* For struct floatformat */ 41 42 /* Use `long double' if the host compiler supports it. (Note that this is not 43 necessarily any longer than `double'. On SunOS/gcc, it's the same as 44 double.) This is necessary because GDB internally converts all floating 45 point values to the widest type supported by the host. 46 47 There are problems however, when the target `long double' is longer than the 48 host's `long double'. In general, we'll probably reduce the precision of 49 any such values and print a warning. */ 50 51 #ifdef HAVE_LONG_DOUBLE 52 typedef long double DOUBLEST; 53 #else 54 typedef double DOUBLEST; 55 #endif 56 57 extern void floatformat_to_doublest (const struct floatformat *, 58 const void *in, DOUBLEST *out); 59 extern void floatformat_from_doublest (const struct floatformat *, 60 const DOUBLEST *in, void *out); 61 62 extern int floatformat_is_negative (const struct floatformat *, char *); 63 extern int floatformat_is_nan (const struct floatformat *, char *); 64 extern char *floatformat_mantissa (const struct floatformat *, char *); 65 66 /* These functions have been replaced by extract_typed_floating and 67 store_typed_floating. 68 69 Most calls are passing in TYPE_LENGTH (TYPE) so can be changed to 70 just pass the TYPE. The remainder pass in the length of a 71 register, those calls should instead pass in the floating point 72 type that corresponds to that length. */ 73 74 extern DOUBLEST deprecated_extract_floating (const void *addr, int len); 75 extern void deprecated_store_floating (void *addr, int len, DOUBLEST val); 76 77 /* Given TYPE, return its floatformat. TYPE_FLOATFORMAT() may return 78 NULL. type_floatformat() detects that and returns a floatformat 79 based on the type size when FLOATFORMAT is NULL. */ 80 81 const struct floatformat *floatformat_from_type (const struct type *type); 82 83 extern DOUBLEST extract_typed_floating (const void *addr, 84 const struct type *type); 85 extern void store_typed_floating (void *addr, const struct type *type, 86 DOUBLEST val); 87 extern void convert_typed_floating (const void *from, 88 const struct type *from_type, 89 void *to, const struct type *to_type); 90 91 /* Table of convenient float-formats. */ 92 extern const struct floatformat *floatformat_ieee_single[BFD_ENDIAN_UNKNOWN]; 93 extern const struct floatformat *floatformat_ieee_double[BFD_ENDIAN_UNKNOWN]; 94 extern const struct floatformat *floatformat_ieee_quad[BFD_ENDIAN_UNKNOWN]; 95 extern const struct floatformat *floatformat_arm_ext[BFD_ENDIAN_UNKNOWN]; 96 extern const struct floatformat *floatformat_ia64_spill[BFD_ENDIAN_UNKNOWN]; 97 98 #endif 99