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[/] [openrisc/] [tags/] [gnu-src/] [gcc-4.5.1/] [gcc-4.5.1-or32-1.0rc1/] [libdecnumber/] [decRound.c] - Rev 411
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/* Internal testing support for rounding for decimal float. Copyright (C) 2005, 2006, 2009 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 3, 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. Under Section 7 of GPL version 3, you are granted additional permissions described in the GCC Runtime Library Exception, version 3.1, as published by the Free Software Foundation. You should have received a copy of the GNU General Public License and a copy of the GCC Runtime Library Exception along with this program; see the files COPYING3 and COPYING.RUNTIME respectively. If not, see <http://www.gnu.org/licenses/>. */ #include "dconfig.h" #include "decContext.h" #include "decRound.h" /* Internal, non-documented functions for testing libgcc functions. This support is not sufficient for application use. */ #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 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; }
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