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9d9f3527 | 1 | /* lroundf() - S390 version. |
2b778ceb | 2 | Copyright (C) 2019-2021 Free Software Foundation, Inc. |
9d9f3527 SL |
3 | |
4 | This file is part of the GNU C Library. | |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
7 | modify it under the terms of the GNU Lesser General Public License as | |
8 | published by the Free Software Foundation; either version 2.1 of the | |
9 | License, or (at your option) any later version. | |
10 | ||
11 | The GNU C Library is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public | |
17 | License along with the GNU C Library; if not, see | |
18 | <https://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #ifdef HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT | |
21 | # include <math.h> | |
22 | # include <libm-alias-float.h> | |
23 | ||
24 | /* The sizeof (long int) differs between s390x (8byte) and s390 (4byte). | |
25 | Thus we need different instructions as the target size is encoded there. | |
26 | Note: On s390 this instruction is only used if build with -mzarch. */ | |
27 | # ifdef __s390x__ | |
28 | # define INSN "cgebra" | |
29 | # else | |
30 | # define INSN "cfebra" | |
31 | # endif | |
32 | ||
33 | long int | |
34 | __lroundf (float x) | |
35 | { | |
36 | long int y; | |
37 | /* The z196 zarch "convert to fixed" (cgebra) instruction is rounding | |
38 | x to the nearest integer with "ties away from 0" rounding mode | |
39 | (M3-field: 1) where inexact exceptions are suppressed (M4-field: 4). */ | |
40 | __asm__ (INSN " %0,1,%1,4" : "=d" (y) : "f" (x) : "cc"); | |
41 | return y; | |
42 | } | |
43 | libm_alias_float (__lround, lround) | |
44 | ||
45 | #else | |
46 | # include <sysdeps/ieee754/flt-32/s_lroundf.c> | |
47 | #endif |