projects / deliverable / binutils-gdb.git / blame
| Commit | Line | Data |
|---|---|---|
| 70100014 UW |
1 | /* Floating point routines for GDB, the GNU debugger. |
| 2 | ||
| 3 | Copyright (C) 2017 Free Software Foundation, Inc. | |
| 4 | ||
| 5 | This file is part of GDB. | |
| 6 | ||
| 7 | This program is free software; you can redistribute it and/or modify | |
| 8 | it under the terms of the GNU General Public License as published by | |
| 9 | the Free Software Foundation; either version 3 of the License, or | |
| 10 | (at your option) any later version. | |
| 11 | ||
| 12 | This program is distributed in the hope that it will be useful, | |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 15 | GNU General Public License for more details. | |
| 16 | ||
| 17 | You should have received a copy of the GNU General Public License | |
| 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
| 19 | ||
| 20 | #include "defs.h" | |
| 21 | #include "dfp.h" | |
| 22 | #include "doublest.h" | |
| 23 | #include "gdbtypes.h" | |
| 24 | #include "floatformat.h" | |
| 25 | #include "target-float.h" | |
| 26 | ||
| 27 | ||
| 28 | /* Typed floating-point routines. These routines operate on floating-point | |
| 29 | values in target format, represented by a byte buffer interpreted as a | |
| 30 | "struct type", which may be either a binary or decimal floating-point | |
| 31 | type (TYPE_CODE_FLT or TYPE_CODE_DECFLOAT). */ | |
| 32 | ||
| 33 | /* Return whether the byte-stream ADDR holds a valid value of | |
| 34 | floating-point type TYPE. */ | |
| 35 | bool | |
| 36 | target_float_is_valid (const gdb_byte *addr, const struct type *type) | |
| 37 | { | |
| 38 | if (TYPE_CODE (type) == TYPE_CODE_FLT) | |
| 39 | return floatformat_is_valid (floatformat_from_type (type), addr); | |
| 40 | ||
| 41 | if (TYPE_CODE (type) == TYPE_CODE_DECFLOAT) | |
| 42 | return true; | |
| 43 | ||
| 44 | gdb_assert_not_reached ("unexpected type code"); | |
| 45 | } | |
| 46 | ||
| 47 | /* Return whether the byte-stream ADDR, interpreted as floating-point | |
| 48 | type TYPE, is numerically equal to zero (of either sign). */ | |
| 49 | bool | |
| 50 | target_float_is_zero (const gdb_byte *addr, const struct type *type) | |
| 51 | { | |
| 52 | if (TYPE_CODE (type) == TYPE_CODE_FLT) | |
| 53 | return (floatformat_classify (floatformat_from_type (type), addr) | |
| 54 | == float_zero); | |
| 55 | ||
| 56 | if (TYPE_CODE (type) == TYPE_CODE_DECFLOAT) | |
| 57 | return decimal_is_zero (addr, TYPE_LENGTH (type), | |
| 58 | gdbarch_byte_order (get_type_arch (type))); | |
| 59 | ||
| 60 | gdb_assert_not_reached ("unexpected type code"); | |
| 61 | } | |
| 62 |