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author | Ben Cheng <bccheng@google.com> | 2013-03-28 11:14:20 -0700 |
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committer | Ben Cheng <bccheng@google.com> | 2013-03-28 12:40:33 -0700 |
commit | af0c51ac87ab2a87caa03fa108f0d164987a2764 (patch) | |
tree | 4b8b470f7c5b69642fdab8d0aa1fbc148d02196b /gcc-4.8/libdecnumber/decRound.c | |
parent | d87cae247d39ebf4f5a6bf25c932a14d2fdb9384 (diff) | |
download | toolchain_gcc-af0c51ac87ab2a87caa03fa108f0d164987a2764.tar.gz toolchain_gcc-af0c51ac87ab2a87caa03fa108f0d164987a2764.tar.bz2 toolchain_gcc-af0c51ac87ab2a87caa03fa108f0d164987a2764.zip |
[GCC 4.8] Initial check-in of GCC 4.8.0
Change-Id: I0719d8a6d0f69b367a6ab6f10eb75622dbf12771
Diffstat (limited to 'gcc-4.8/libdecnumber/decRound.c')
-rw-r--r-- | gcc-4.8/libdecnumber/decRound.c | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/gcc-4.8/libdecnumber/decRound.c b/gcc-4.8/libdecnumber/decRound.c new file mode 100644 index 000000000..1f4054187 --- /dev/null +++ b/gcc-4.8/libdecnumber/decRound.c @@ -0,0 +1,97 @@ +/* Internal testing support for rounding for decimal float. + + Copyright (C) 2005-2013 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; +} |