1 /* Configure optimized libm functions. S390 version.
2 Copyright (C) 2019-2021 Free Software Foundation, Inc.
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
roundtoint(double_t x)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
converttoint(double_t x)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
54