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2763d314 | 1 | /* Configure optimized libm functions. S390 version. |
2b778ceb | 2 | Copyright (C) 2019-2021 Free Software Foundation, Inc. |
2763d314 SL |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
17 | <https://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #ifndef S390_MATH_PRIVATE_H | |
20 | #define S390_MATH_PRIVATE_H 1 | |
21 | ||
22 | #include <stdint.h> | |
23 | #include <math.h> | |
24 | ||
25 | #ifdef HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT | |
26 | # define TOINT_INTRINSICS 1 | |
27 | ||
28 | static inline double_t | |
29 | roundtoint (double_t x) | |
30 | { | |
31 | double_t y; | |
32 | /* The z196 zarch "load fp integer" (fidbra) instruction is rounding | |
33 | x to the nearest integer with ties away from zero (M3-field: 1) | |
34 | where inexact exceptions are suppressed (M4-field: 4). */ | |
35 | __asm__ ("fidbra %0,1,%1,4" : "=f" (y) : "f" (x)); | |
36 | return y; | |
37 | } | |
38 | ||
39 | static inline int32_t | |
40 | converttoint (double_t x) | |
41 | { | |
42 | int32_t y; | |
43 | /* The z196 zarch "convert to fixed" (cfdbra) instruction is rounding | |
44 | x to the nearest integer with ties away from zero (M3-field: 1) | |
45 | where inexact exceptions are suppressed (M4-field: 4). */ | |
46 | __asm__ ("cfdbra %0,1,%1,4" : "=d" (y) : "f" (x) : "cc"); | |
47 | return y; | |
48 | } | |
49 | #endif | |
50 | ||
51 | #include_next <math_private.h> | |
52 | ||
53 | #endif |