projects / deliverable / binutils-gdb.git / blame
| Commit | Line | Data |
|---|---|---|
| f5bc1778 DJ |
1 | /* Internal testing support for rounding for decimal float. |
| 2 | ||
| 0f5f799a | 3 | Copyright (C) 2005-2013 Free Software Foundation, Inc. |
| f5bc1778 DJ |
4 | |
| 5 | This file is part of GCC. | |
| 6 | ||
| 7 | GCC is free software; you can redistribute it and/or modify it | |
| 8 | under the terms of the GNU General Public License as published by | |
| 168a2f77 | 9 | the Free Software Foundation; either version 3, or (at your option) |
| f5bc1778 DJ |
10 | any later version. |
| 11 | ||
| f5bc1778 DJ |
12 | GCC is distributed in the hope that it will be useful, but WITHOUT |
| 13 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
| 14 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public | |
| 15 | License for more details. | |
| 16 | ||
| 168a2f77 DD |
17 | Under Section 7 of GPL version 3, you are granted additional |
| 18 | permissions described in the GCC Runtime Library Exception, version | |
| 19 | 3.1, as published by the Free Software Foundation. | |
| 20 | ||
| 21 | You should have received a copy of the GNU General Public License and | |
| 22 | a copy of the GCC Runtime Library Exception along with this program; | |
| 23 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
| 24 | <http://www.gnu.org/licenses/>. */ | |
| f5bc1778 | 25 | |
| 5f5dfcbe | 26 | #include "dconfig.h" |
| f5bc1778 DJ |
27 | #include "decContext.h" |
| 28 | #include "decRound.h" | |
| 29 | ||
| 30 | /* Internal, non-documented functions for testing libgcc functions. | |
| 31 | This support is not sufficient for application use. */ | |
| 32 | ||
| 33 | #define FE_DEC_DOWNWARD 0 | |
| 34 | #define FE_DEC_TONEAREST 1 | |
| 35 | #define FE_DEC_TONEARESTFROMZERO 2 | |
| 36 | #define FE_DEC_TOWARDZERO 3 | |
| 37 | #define FE_DEC_UPWARD 4 | |
| 38 | #define FE_DEC_MAX 5 | |
| 39 | ||
| 40 | static enum rounding __dfp_rounding_mode = DEC_ROUND_HALF_EVEN; | |
| 41 | ||
| 42 | /* Set the decNumber rounding mode from the FE_DEC_* value in MODE. */ | |
| 43 | ||
| 44 | void | |
| 45 | __dfp_set_round (int mode) | |
| 46 | { | |
| 47 | switch (mode) | |
| 48 | { | |
| 49 | case FE_DEC_DOWNWARD: | |
| 50 | __dfp_rounding_mode = DEC_ROUND_FLOOR; break; | |
| 51 | case FE_DEC_TONEAREST: | |
| 52 | __dfp_rounding_mode = DEC_ROUND_HALF_EVEN; break; | |
| 53 | case FE_DEC_TONEARESTFROMZERO: | |
| 54 | __dfp_rounding_mode = DEC_ROUND_HALF_UP; break; | |
| 55 | case FE_DEC_TOWARDZERO: | |
| 56 | __dfp_rounding_mode = DEC_ROUND_DOWN; break; | |
| 57 | case FE_DEC_UPWARD: | |
| 58 | __dfp_rounding_mode = DEC_ROUND_CEILING; break; | |
| 59 | default: | |
| 60 | /* We can't use assert in libgcc, so just return the default mode. */ | |
| 61 | __dfp_rounding_mode = DEC_ROUND_HALF_EVEN; break; | |
| 62 | } | |
| 63 | } | |
| 64 | ||
| 65 | /* Return the decNumber rounding mode as an FE_DEC_* value. */ | |
| 66 | ||
| 67 | int | |
| 68 | __dfp_get_round (void) | |
| 69 | { | |
| 70 | int mode; | |
| 71 | ||
| 72 | switch (__dfp_rounding_mode) | |
| 73 | { | |
| 74 | case DEC_ROUND_FLOOR: | |
| 75 | mode = FE_DEC_DOWNWARD; break; | |
| 76 | case DEC_ROUND_HALF_EVEN: | |
| 77 | mode = FE_DEC_TONEAREST; break; | |
| 78 | case DEC_ROUND_HALF_UP: | |
| 79 | mode = FE_DEC_TONEARESTFROMZERO; break; | |
| 80 | case DEC_ROUND_DOWN: | |
| 81 | mode = FE_DEC_TOWARDZERO; break; | |
| 82 | case DEC_ROUND_CEILING: | |
| 83 | mode = FE_DEC_UPWARD; break; | |
| 84 | default: | |
| 85 | /* We shouldn't get here, but can't use assert in libgcc. */ | |
| 86 | mode = -1; | |
| 87 | } | |
| 88 | return mode; | |
| 89 | } | |
| 90 | ||
| 91 | /* Return the decNumber version of the current rounding mode. */ | |
| 92 | ||
| 93 | enum rounding | |
| 94 | __decGetRound (void) | |
| 95 | { | |
| 96 | return __dfp_rounding_mode; | |
| 97 | } |