1 /*-
2 * Copyright (c) 2004 David Schultz <das@FreeBSD.ORG>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: src/lib/msun/arm/fenv.c,v 1.1 2004/06/06 10:03:59 das Exp $
27 */
28
29 #pragma once
30
31 #include <sys/cdefs.h>
32
33 #if defined(__arm__)
34
35 #if !defined(__BIONIC_FENV_INLINE)
36 #define __BIONIC_FENV_INLINE static __inline
37 #endif
38
39 #include <bits/fenv_arm.h>
40
41 __BEGIN_DECLS
42
43 #define FPSCR_RMODE_SHIFT 22
44
fegetenv(fenv_t * __envp)45 __BIONIC_FENV_INLINE int fegetenv(fenv_t* __envp) {
46 fenv_t _fpscr;
47 __asm__ __volatile__("vmrs %0,fpscr" : "=r" (_fpscr));
48 *__envp = _fpscr;
49 return 0;
50 }
51
fesetenv(const fenv_t * __envp)52 __BIONIC_FENV_INLINE int fesetenv(const fenv_t* __envp) {
53 fenv_t _fpscr = *__envp;
54 __asm__ __volatile__("vmsr fpscr,%0" : :"ri" (_fpscr));
55 return 0;
56 }
57
feclearexcept(int __excepts)58 __BIONIC_FENV_INLINE int feclearexcept(int __excepts) {
59 fexcept_t __fpscr;
60 fegetenv(&__fpscr);
61 __fpscr &= ~__excepts;
62 fesetenv(&__fpscr);
63 return 0;
64 }
65
fegetexceptflag(fexcept_t * __flagp,int __excepts)66 __BIONIC_FENV_INLINE int fegetexceptflag(fexcept_t* __flagp, int __excepts) {
67 fexcept_t __fpscr;
68 fegetenv(&__fpscr);
69 *__flagp = __fpscr & __excepts;
70 return 0;
71 }
72
fesetexceptflag(const fexcept_t * __flagp,int __excepts)73 __BIONIC_FENV_INLINE int fesetexceptflag(const fexcept_t* __flagp, int __excepts) {
74 fexcept_t __fpscr;
75 fegetenv(&__fpscr);
76 __fpscr &= ~__excepts;
77 __fpscr |= *__flagp & __excepts;
78 fesetenv(&__fpscr);
79 return 0;
80 }
81
feraiseexcept(int __excepts)82 __BIONIC_FENV_INLINE int feraiseexcept(int __excepts) {
83 fexcept_t __ex = __excepts;
84 fesetexceptflag(&__ex, __excepts);
85 return 0;
86 }
87
fetestexcept(int __excepts)88 __BIONIC_FENV_INLINE int fetestexcept(int __excepts) {
89 fexcept_t __fpscr;
90 fegetenv(&__fpscr);
91 return (__fpscr & __excepts);
92 }
93
fegetround(void)94 __BIONIC_FENV_INLINE int fegetround(void) {
95 fenv_t _fpscr;
96 fegetenv(&_fpscr);
97 return ((_fpscr >> FPSCR_RMODE_SHIFT) & 0x3);
98 }
99
fesetround(int __round)100 __BIONIC_FENV_INLINE int fesetround(int __round) {
101 fenv_t _fpscr;
102 fegetenv(&_fpscr);
103 _fpscr &= ~(0x3 << FPSCR_RMODE_SHIFT);
104 _fpscr |= (__round << FPSCR_RMODE_SHIFT);
105 fesetenv(&_fpscr);
106 return 0;
107 }
108
feholdexcept(fenv_t * __envp)109 __BIONIC_FENV_INLINE int feholdexcept(fenv_t* __envp) {
110 fenv_t __env;
111 fegetenv(&__env);
112 *__envp = __env;
113 __env &= ~FE_ALL_EXCEPT;
114 fesetenv(&__env);
115 return 0;
116 }
117
feupdateenv(const fenv_t * __envp)118 __BIONIC_FENV_INLINE int feupdateenv(const fenv_t* __envp) {
119 fexcept_t __fpscr;
120 fegetenv(&__fpscr);
121 fesetenv(__envp);
122 feraiseexcept(__fpscr & FE_ALL_EXCEPT);
123 return 0;
124 }
125
feenableexcept(int __mask __unused)126 __BIONIC_FENV_INLINE int feenableexcept(int __mask __unused) {
127 return -1;
128 }
129
fedisableexcept(int __mask __unused)130 __BIONIC_FENV_INLINE int fedisableexcept(int __mask __unused) {
131 return 0;
132 }
133
fegetexcept(void)134 __BIONIC_FENV_INLINE int fegetexcept(void) {
135 return 0;
136 }
137
138 #undef FPSCR_RMODE_SHIFT
139
140 __END_DECLS
141
142 #endif
143