projects / deliverable / binutils-gdb.git / blame
| Commit | Line | Data |
|---|---|---|
| d7e1be46 PB |
1 | /* IEEE floating point support declarations, for GDB, the GNU Debugger. |
| 2 | Copyright (C) 1991 Free Software Foundation, Inc. | |
| 3 | ||
| 4 | This file is part of GDB. | |
| 5 | ||
| 6 | This program is free software; you can redistribute it and/or modify | |
| 7 | it under the terms of the GNU General Public License as published by | |
| 8 | the Free Software Foundation; either version 2 of the License, or | |
| 9 | (at your option) any later version. | |
| 10 | ||
| 11 | This program is distributed in the hope that it will be useful, | |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 14 | GNU General Public License for more details. | |
| 15 | ||
| 16 | You should have received a copy of the GNU General Public License | |
| 17 | along with this program; if not, write to the Free Software | |
| 18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
| 19 | ||
| 20 | #if !defined (IEEE_FLOAT_H) | |
| 21 | #define IEEE_FLOAT_H 1 | |
| 22 | ||
| 23 | #include "ansidecl.h" | |
| 24 | ||
| 25 | /* Parameters for extended float format: */ | |
| 26 | ||
| 27 | struct ext_format { | |
| 28 | unsigned totalsize; /* Total size of extended number */ | |
| 29 | unsigned signbyte; /* Byte number of sign bit */ | |
| 30 | unsigned char signmask; /* Mask for sign bit */ | |
| 31 | unsigned expbyte_h; /* High byte of exponent */ | |
| 32 | unsigned expbyte_l; /* Low byte of exponent */ | |
| 33 | unsigned manbyte_h; /* High byte of mantissa */ | |
| 34 | unsigned manbyte_l; /* Low byte of mantissa */ | |
| 35 | }; | |
| 36 | ||
| 37 | #define TOTALSIZE ext_format->totalsize | |
| 38 | #define SIGNBYTE ext_format->signbyte | |
| 39 | #define SIGNMASK ext_format->signmask | |
| 40 | #define EXPBYTE_H ext_format->expbyte_h | |
| 41 | #define EXPBYTE_L ext_format->expbyte_l | |
| 42 | #define MANBYTE_H ext_format->manbyte_h | |
| 43 | #define MANBYTE_L ext_format->manbyte_l | |
| 44 | ||
| 45 | /* Actual ext_format structs for various machines are in the *-tdep.c file | |
| 46 | for each machine. */ | |
| 47 | ||
| 48 | #define EXT_EXP_NAN 0x7FFF /* Exponent value that indicates NaN */ | |
| 49 | #define EXT_EXP_BIAS 0x3FFF /* Amount added to "true" exponent for ext */ | |
| 50 | #define DBL_EXP_BIAS 0x3FF /* Ditto, for doubles */ | |
| 51 | ||
| 52 | /* Convert an IEEE extended float to a double. | |
| 53 | FROM is the address of the extended float. | |
| 54 | Store the double in *TO. */ | |
| 55 | ||
| 56 | extern void | |
| 57 | ieee_extended_to_double PARAMS ((const struct ext_format *, char *, double *)); | |
| 58 | ||
| 59 | /* The converse: convert the double *FROM to an extended float | |
| 60 | and store where TO points. */ | |
| 61 | ||
| 62 | extern void | |
| 63 | double_to_ieee_extended PARAMS ((const struct ext_format *, double *, char *)); | |
| 64 | ||
| 65 | #endif /* defined (IEEE_FLOAT_H) */ |