]>
Commit | Line | Data |
---|---|---|
9d9f3527 | 1 | /* lroundl() - S390 version. |
d614a753 | 2 | Copyright (C) 2019-2020 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 <math_private.h> | |
23 | # include <libm-alias-ldouble.h> | |
24 | ||
25 | /* The sizeof (long int) differs between s390x (8byte) and s390 (4byte). | |
26 | Thus we need different instructions as the target size is encoded there. | |
27 | Note: On s390 this instruction is only used if build with -mzarch. */ | |
28 | # ifdef __s390x__ | |
29 | # define INSN "cgxbra" | |
30 | # else | |
31 | # define INSN "cfxbra" | |
32 | # endif | |
33 | ||
34 | long int | |
35 | __lroundl (_Float128 x) | |
36 | { | |
37 | long int y; | |
38 | /* The z196 zarch "convert to fixed" (cgxbra) instruction is rounding | |
39 | x to the nearest integer with "ties away from 0" rounding mode | |
40 | (M3-field: 1) where inexact exceptions are suppressed (M4-field: 4). */ | |
41 | __asm__ (INSN " %0,1,%1,4" : "=d" (y) : "f" (x) : "cc"); | |
42 | return y; | |
43 | } | |
44 | libm_alias_ldouble (__lround, lround) | |
45 | ||
46 | #else | |
47 | # include <sysdeps/ieee754/ldbl-128/s_lroundl.c> | |
48 | #endif |