| 1 |
227 |
jeremybenn |
/* Internal testing support for rounding for decimal float.
|
| 2 |
|
|
|
| 3 |
|
|
Copyright (C) 2005, 2006, 2009 Free Software Foundation, Inc.
|
| 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
|
| 9 |
|
|
the Free Software Foundation; either version 3, or (at your option)
|
| 10 |
|
|
any later version.
|
| 11 |
|
|
|
| 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 |
|
|
|
| 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/>. */
|
| 25 |
|
|
|
| 26 |
|
|
#include "dconfig.h"
|
| 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 |
|
|
}
|
