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Diffstat (limited to 'include/rounding-mode.h')
-rw-r--r-- | include/rounding-mode.h | 65 |
1 files changed, 0 insertions, 65 deletions
diff --git a/include/rounding-mode.h b/include/rounding-mode.h deleted file mode 100644 index 5d5cfe5f10..0000000000 --- a/include/rounding-mode.h +++ /dev/null @@ -1,65 +0,0 @@ -/* Handle floating-point rounding mode within libc. - Copyright (C) 2012-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. */ - -#ifndef _ROUNDING_MODE_H -#define _ROUNDING_MODE_H 1 - -#include <fenv.h> -#include <stdbool.h> -#include <stdlib.h> - -/* Get the architecture-specific definition of how to determine the - rounding mode in libc. This header must also define the FE_* - macros for any standard rounding modes the architecture does not - have in <fenv.h>, to arbitrary distinct values. */ -#include <get-rounding-mode.h> - -/* Return true if a number should be rounded away from zero in - rounding mode MODE, false otherwise. NEGATIVE is true if the - number is negative, false otherwise. LAST_DIGIT_ODD is true if the - last digit of the truncated value (last bit for binary) is odd, - false otherwise. HALF_BIT is true if the number is at least half - way from the truncated value to the next value with the - least-significant digit in the same place, false otherwise. - MORE_BITS is true if the number is not exactly equal to the - truncated value or the half-way value, false otherwise. */ - -static bool -round_away (bool negative, bool last_digit_odd, bool half_bit, bool more_bits, - int mode) -{ - switch (mode) - { - case FE_DOWNWARD: - return negative && (half_bit || more_bits); - - case FE_TONEAREST: - return half_bit && (last_digit_odd || more_bits); - - case FE_TOWARDZERO: - return false; - - case FE_UPWARD: - return !negative && (half_bit || more_bits); - - default: - abort (); - } -} - -#endif /* rounding-mode.h */ |