da817a2fea
* decContext.h: Properly guard inclusion of stdint.h * decContext.c: Include config.h * decLibrary.c: Ditto. * decNumber.c: Ditto. * decRound.c: Ditto. * decUtility.c: Ditto. * decimal32.c: Ditto. * decimal64.c: Ditto. * decimal128.c: Ditto. From-SVN: r107695
94 lines
2.6 KiB
C
94 lines
2.6 KiB
C
/* Temporary support for a libc-like fp environment for decimal float.
|
|
Copyright (C) 2005 Free Software Foundation, Inc.
|
|
|
|
This file is part of GCC.
|
|
|
|
GCC is free software; you can redistribute it and/or modify it under
|
|
the terms of the GNU General Public License as published by the Free
|
|
Software Foundation; either version 2, or (at your option) any later
|
|
version.
|
|
|
|
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
|
|
WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with GCC; see the file COPYING. If not, write to the Free
|
|
Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
|
|
02110-1301, USA. */
|
|
|
|
#include "config.h"
|
|
#include "decContext.h"
|
|
|
|
#define FE_DEC_DOWNWARD 0
|
|
#define FE_DEC_TONEAREST 1
|
|
#define FE_DEC_TONEARESTFROMZERO 2
|
|
#define FE_DEC_TOWARDZERO 3
|
|
#define FE_DEC_UPWARD 4
|
|
#define FE_DEC_MAX 5
|
|
|
|
extern void __dfp_set_round (int);
|
|
extern int __dfp_get_round (void);
|
|
extern enum rounding __decGetRound (void);
|
|
|
|
/* FIXME: these should be in thread-local storage for runtime support. */
|
|
static enum rounding __dfp_rounding_mode = DEC_ROUND_HALF_EVEN;
|
|
|
|
/* Set the decNumber rounding mode from the FE_DEC_* value in MODE. */
|
|
|
|
void
|
|
__dfp_set_round (int mode)
|
|
{
|
|
switch (mode)
|
|
{
|
|
case FE_DEC_DOWNWARD:
|
|
__dfp_rounding_mode = DEC_ROUND_FLOOR; break;
|
|
case FE_DEC_TONEAREST:
|
|
__dfp_rounding_mode = DEC_ROUND_HALF_EVEN; break;
|
|
case FE_DEC_TONEARESTFROMZERO:
|
|
__dfp_rounding_mode = DEC_ROUND_HALF_UP; break;
|
|
case FE_DEC_TOWARDZERO:
|
|
__dfp_rounding_mode = DEC_ROUND_DOWN; break;
|
|
case FE_DEC_UPWARD:
|
|
__dfp_rounding_mode = DEC_ROUND_CEILING; break;
|
|
default:
|
|
/* We can't use assert in libgcc, so just return the default mode. */
|
|
__dfp_rounding_mode = DEC_ROUND_HALF_EVEN; break;
|
|
}
|
|
}
|
|
|
|
/* Return the decNumber rounding mode as an FE_DEC_* value. */
|
|
|
|
int
|
|
__dfp_get_round (void)
|
|
{
|
|
int mode;
|
|
|
|
switch (__dfp_rounding_mode)
|
|
{
|
|
case DEC_ROUND_FLOOR:
|
|
mode = FE_DEC_DOWNWARD; break;
|
|
case DEC_ROUND_HALF_EVEN:
|
|
mode = FE_DEC_TONEAREST; break;
|
|
case DEC_ROUND_HALF_UP:
|
|
mode = FE_DEC_TONEARESTFROMZERO; break;
|
|
case DEC_ROUND_DOWN:
|
|
mode = FE_DEC_TOWARDZERO; break;
|
|
case DEC_ROUND_CEILING:
|
|
mode = FE_DEC_UPWARD; break;
|
|
default:
|
|
/* We shouldn't get here, but can't use assert in libgcc. */
|
|
mode = -1;
|
|
}
|
|
return mode;
|
|
}
|
|
|
|
/* Return the decNumber version of the current rounding mode. */
|
|
|
|
enum rounding
|
|
__decGetRound (void)
|
|
{
|
|
return __dfp_rounding_mode;
|
|
}
|