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320054e8 DG |
1 | /* origin: FreeBSD /usr/src/lib/msun/src/math_private.h */ |
2 | /* | |
3 | * ==================================================== | |
4 | * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. | |
5 | * | |
6 | * Developed at SunPro, a Sun Microsystems, Inc. business. | |
7 | * Permission to use, copy, modify, and distribute this | |
8 | * software is freely granted, provided that this notice | |
9 | * is preserved. | |
10 | * ==================================================== | |
11 | */ | |
12 | ||
13 | #ifndef _LIBM_H | |
14 | #define _LIBM_H | |
15 | ||
16 | #include <stdint.h> | |
17 | #include <float.h> | |
18 | #include <math.h> | |
19 | #include <complex.h> | |
20 | #include <endian.h> | |
21 | ||
22 | #if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024 | |
23 | #elif LDBL_MANT_DIG == 64 && LDBL_MAX_EXP == 16384 && __BYTE_ORDER == __LITTLE_ENDIAN | |
24 | union ldshape { | |
25 | long double f; | |
26 | struct { | |
27 | uint64_t m; | |
28 | uint16_t se; | |
29 | } i; | |
30 | }; | |
31 | #elif LDBL_MANT_DIG == 64 && LDBL_MAX_EXP == 16384 && __BYTE_ORDER == __BIG_ENDIAN | |
32 | /* This is the m68k variant of 80-bit long double, and this definition only works | |
33 | * on archs where the alignment requirement of uint64_t is <= 4. */ | |
34 | union ldshape { | |
35 | long double f; | |
36 | struct { | |
37 | uint16_t se; | |
38 | uint16_t pad; | |
39 | uint64_t m; | |
40 | } i; | |
41 | }; | |
42 | #elif LDBL_MANT_DIG == 113 && LDBL_MAX_EXP == 16384 && __BYTE_ORDER == __LITTLE_ENDIAN | |
43 | union ldshape { | |
44 | long double f; | |
45 | struct { | |
46 | uint64_t lo; | |
47 | uint32_t mid; | |
48 | uint16_t top; | |
49 | uint16_t se; | |
50 | } i; | |
51 | struct { | |
52 | uint64_t lo; | |
53 | uint64_t hi; | |
54 | } i2; | |
55 | }; | |
56 | #elif LDBL_MANT_DIG == 113 && LDBL_MAX_EXP == 16384 && __BYTE_ORDER == __BIG_ENDIAN | |
57 | union ldshape { | |
58 | long double f; | |
59 | struct { | |
60 | uint16_t se; | |
61 | uint16_t top; | |
62 | uint32_t mid; | |
63 | uint64_t lo; | |
64 | } i; | |
65 | struct { | |
66 | uint64_t hi; | |
67 | uint64_t lo; | |
68 | } i2; | |
69 | }; | |
70 | #else | |
71 | #error Unsupported long double representation | |
72 | #endif | |
73 | ||
e5f14be3 | 74 | #ifdef __wasilibc_unmodified_upstream // WASI has no floating-point status flags |
320054e8 DG |
75 | #define FORCE_EVAL(x) do { \ |
76 | if (sizeof(x) == sizeof(float)) { \ | |
77 | volatile float __x; \ | |
78 | __x = (x); \ | |
79 | } else if (sizeof(x) == sizeof(double)) { \ | |
80 | volatile double __x; \ | |
81 | __x = (x); \ | |
82 | } else { \ | |
83 | volatile long double __x; \ | |
84 | __x = (x); \ | |
85 | } \ | |
86 | } while(0) | |
87 | #else | |
88 | /* | |
89 | * WebAssembly doesn't have floating-point status flags, so there's no reason | |
90 | * to force evaluations. | |
91 | * */ | |
92 | #define FORCE_EVAL(x) ((void)(x)) | |
93 | #endif | |
94 | ||
95 | /* Get two 32 bit ints from a double. */ | |
96 | #define EXTRACT_WORDS(hi,lo,d) \ | |
97 | do { \ | |
98 | union {double f; uint64_t i;} __u; \ | |
99 | __u.f = (d); \ | |
100 | (hi) = __u.i >> 32; \ | |
101 | (lo) = (uint32_t)__u.i; \ | |
102 | } while (0) | |
103 | ||
104 | /* Get the more significant 32 bit int from a double. */ | |
105 | #define GET_HIGH_WORD(hi,d) \ | |
106 | do { \ | |
107 | union {double f; uint64_t i;} __u; \ | |
108 | __u.f = (d); \ | |
109 | (hi) = __u.i >> 32; \ | |
110 | } while (0) | |
111 | ||
112 | /* Get the less significant 32 bit int from a double. */ | |
113 | #define GET_LOW_WORD(lo,d) \ | |
114 | do { \ | |
115 | union {double f; uint64_t i;} __u; \ | |
116 | __u.f = (d); \ | |
117 | (lo) = (uint32_t)__u.i; \ | |
118 | } while (0) | |
119 | ||
120 | /* Set a double from two 32 bit ints. */ | |
121 | #define INSERT_WORDS(d,hi,lo) \ | |
122 | do { \ | |
123 | union {double f; uint64_t i;} __u; \ | |
124 | __u.i = ((uint64_t)(hi)<<32) | (uint32_t)(lo); \ | |
125 | (d) = __u.f; \ | |
126 | } while (0) | |
127 | ||
128 | /* Set the more significant 32 bits of a double from an int. */ | |
129 | #define SET_HIGH_WORD(d,hi) \ | |
130 | do { \ | |
131 | union {double f; uint64_t i;} __u; \ | |
132 | __u.f = (d); \ | |
133 | __u.i &= 0xffffffff; \ | |
134 | __u.i |= (uint64_t)(hi) << 32; \ | |
135 | (d) = __u.f; \ | |
136 | } while (0) | |
137 | ||
138 | /* Set the less significant 32 bits of a double from an int. */ | |
139 | #define SET_LOW_WORD(d,lo) \ | |
140 | do { \ | |
141 | union {double f; uint64_t i;} __u; \ | |
142 | __u.f = (d); \ | |
143 | __u.i &= 0xffffffff00000000ull; \ | |
144 | __u.i |= (uint32_t)(lo); \ | |
145 | (d) = __u.f; \ | |
146 | } while (0) | |
147 | ||
148 | /* Get a 32 bit int from a float. */ | |
149 | #define GET_FLOAT_WORD(w,d) \ | |
150 | do { \ | |
151 | union {float f; uint32_t i;} __u; \ | |
152 | __u.f = (d); \ | |
153 | (w) = __u.i; \ | |
154 | } while (0) | |
155 | ||
156 | /* Set a float from a 32 bit int. */ | |
157 | #define SET_FLOAT_WORD(d,w) \ | |
158 | do { \ | |
159 | union {float f; uint32_t i;} __u; \ | |
160 | __u.i = (w); \ | |
161 | (d) = __u.f; \ | |
162 | } while (0) | |
163 | ||
164 | #undef __CMPLX | |
165 | #undef CMPLX | |
166 | #undef CMPLXF | |
167 | #undef CMPLXL | |
168 | ||
169 | #define __CMPLX(x, y, t) \ | |
170 | ((union { _Complex t __z; t __xy[2]; }){.__xy = {(x),(y)}}.__z) | |
171 | ||
172 | #define CMPLX(x, y) __CMPLX(x, y, double) | |
173 | #define CMPLXF(x, y) __CMPLX(x, y, float) | |
174 | #define CMPLXL(x, y) __CMPLX(x, y, long double) | |
175 | ||
176 | /* fdlibm kernel functions */ | |
177 | ||
178 | hidden int __rem_pio2_large(double*,double*,int,int,int); | |
179 | ||
180 | hidden int __rem_pio2(double,double*); | |
181 | hidden double __sin(double,double,int); | |
182 | hidden double __cos(double,double); | |
183 | hidden double __tan(double,double,int); | |
184 | hidden double __expo2(double); | |
185 | hidden double complex __ldexp_cexp(double complex,int); | |
186 | ||
187 | hidden int __rem_pio2f(float,double*); | |
188 | hidden float __sindf(double); | |
189 | hidden float __cosdf(double); | |
190 | hidden float __tandf(double,int); | |
191 | hidden float __expo2f(float); | |
192 | hidden float complex __ldexp_cexpf(float complex,int); | |
193 | ||
194 | hidden int __rem_pio2l(long double, long double *); | |
195 | hidden long double __sinl(long double, long double, int); | |
196 | hidden long double __cosl(long double, long double); | |
197 | hidden long double __tanl(long double, long double, int); | |
198 | ||
199 | /* polynomial evaluation */ | |
200 | hidden long double __polevll(long double, const long double *, int); | |
201 | hidden long double __p1evll(long double, const long double *, int); | |
202 | ||
203 | extern int __signgam; | |
204 | hidden double __lgamma_r(double, int *); | |
205 | hidden float __lgammaf_r(float, int *); | |
206 | ||
207 | #endif |