| /* Overridable constants and operations. |
| Copyright (C) 2013-2018 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)) |