mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-30 08:40:07 +00:00
48 lines
2.0 KiB
C
48 lines
2.0 KiB
C
/* Overridable constants and operations.
|
|
Copyright (C) 2013-2017 Free Software Foundation, Inc.
|
|
|
|
This program 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.
|
|
|
|
This program 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 this program; if not, see <http://www.gnu.org/licenses/>. */
|
|
|
|
#include <stdint.h>
|
|
|
|
typedef long mantissa_t;
|
|
typedef int64_t mantissa_store_t;
|
|
|
|
#define TWOPOW(i) (1L << i)
|
|
|
|
#define RADIX_EXP 24
|
|
#define RADIX TWOPOW (RADIX_EXP) /* 2^24 */
|
|
|
|
/* Divide D by RADIX and put the remainder in R. D must be a non-negative
|
|
integral value. */
|
|
#define DIV_RADIX(d, r) \
|
|
({ \
|
|
r = d & (RADIX - 1); \
|
|
d >>= RADIX_EXP; \
|
|
})
|
|
|
|
/* Put the integer component of a double X in R and retain the fraction in
|
|
X. This is used in extracting mantissa digits for MP_NO by using the
|
|
integer portion of the current value of the number as the current mantissa
|
|
digit and then scaling by RADIX to get the next mantissa digit in the same
|
|
manner. */
|
|
#define INTEGER_OF(x, i) \
|
|
({ \
|
|
i = (mantissa_t) x; \
|
|
x -= i; \
|
|
})
|
|
|
|
/* Align IN down to F. The code assumes that F is a power of two. */
|
|
#define ALIGN_DOWN_TO(in, f) ((in) & - (f))
|