math: add dummy implementations of 128 bit long double functions
[musl] / src / internal / libm.h
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 == 113 && LDBL_MAX_EXP == 16384 && __BYTE_ORDER == __LITTLE_ENDIAN
32 union ldshape {
33         long double f;
34         struct {
35                 uint64_t lo;
36                 uint32_t mid;
37                 uint16_t top;
38                 uint16_t se;
39         } i;
40         struct {
41                 uint64_t lo;
42                 uint64_t hi;
43         } i2;
44 };
45 #elif LDBL_MANT_DIG == 113 && LDBL_MAX_EXP == 16384 && __BYTE_ORDER == __BIG_ENDIAN
46 union ldshape {
47         long double f;
48         struct {
49                 uint16_t se;
50                 uint16_t top;
51                 uint32_t mid;
52                 uint64_t lo;
53         } i;
54         struct {
55                 uint64_t hi;
56                 uint64_t lo;
57         } i2;
58 };
59 #else
60 #error Unsupported long double representation
61 #endif
62
63 #define FORCE_EVAL(x) do {                        \
64         if (sizeof(x) == sizeof(float)) {         \
65                 volatile float __x;               \
66                 __x = (x);                        \
67         } else if (sizeof(x) == sizeof(double)) { \
68                 volatile double __x;              \
69                 __x = (x);                        \
70         } else {                                  \
71                 volatile long double __x;         \
72                 __x = (x);                        \
73         }                                         \
74 } while(0)
75
76 /* Get two 32 bit ints from a double.  */
77 #define EXTRACT_WORDS(hi,lo,d)                    \
78 do {                                              \
79   union {double f; uint64_t i;} __u;              \
80   __u.f = (d);                                    \
81   (hi) = __u.i >> 32;                             \
82   (lo) = (uint32_t)__u.i;                         \
83 } while (0)
84
85 /* Get the more significant 32 bit int from a double.  */
86 #define GET_HIGH_WORD(hi,d)                       \
87 do {                                              \
88   union {double f; uint64_t i;} __u;              \
89   __u.f = (d);                                    \
90   (hi) = __u.i >> 32;                             \
91 } while (0)
92
93 /* Get the less significant 32 bit int from a double.  */
94 #define GET_LOW_WORD(lo,d)                        \
95 do {                                              \
96   union {double f; uint64_t i;} __u;              \
97   __u.f = (d);                                    \
98   (lo) = (uint32_t)__u.i;                         \
99 } while (0)
100
101 /* Set a double from two 32 bit ints.  */
102 #define INSERT_WORDS(d,hi,lo)                     \
103 do {                                              \
104   union {double f; uint64_t i;} __u;              \
105   __u.i = ((uint64_t)(hi)<<32) | (uint32_t)(lo);  \
106   (d) = __u.f;                                    \
107 } while (0)
108
109 /* Set the more significant 32 bits of a double from an int.  */
110 #define SET_HIGH_WORD(d,hi)                       \
111 do {                                              \
112   union {double f; uint64_t i;} __u;              \
113   __u.f = (d);                                    \
114   __u.i &= 0xffffffff;                            \
115   __u.i |= (uint64_t)(hi) << 32;                  \
116   (d) = __u.f;                                    \
117 } while (0)
118
119 /* Set the less significant 32 bits of a double from an int.  */
120 #define SET_LOW_WORD(d,lo)                        \
121 do {                                              \
122   union {double f; uint64_t i;} __u;              \
123   __u.f = (d);                                    \
124   __u.i &= 0xffffffff00000000ull;                 \
125   __u.i |= (uint32_t)(lo);                        \
126   (d) = __u.f;                                    \
127 } while (0)
128
129 /* Get a 32 bit int from a float.  */
130 #define GET_FLOAT_WORD(w,d)                       \
131 do {                                              \
132   union {float f; uint32_t i;} __u;               \
133   __u.f = (d);                                    \
134   (w) = __u.i;                                    \
135 } while (0)
136
137 /* Set a float from a 32 bit int.  */
138 #define SET_FLOAT_WORD(d,w)                       \
139 do {                                              \
140   union {float f; uint32_t i;} __u;               \
141   __u.i = (w);                                    \
142   (d) = __u.f;                                    \
143 } while (0)
144
145 #undef __CMPLX
146 #undef CMPLX
147 #undef CMPLXF
148 #undef CMPLXL
149
150 #define __CMPLX(x, y, t) \
151         ((union { _Complex t __z; t __xy[2]; }){.__xy = {(x),(y)}}.__z)
152
153 #define CMPLX(x, y) __CMPLX(x, y, double)
154 #define CMPLXF(x, y) __CMPLX(x, y, float)
155 #define CMPLXL(x, y) __CMPLX(x, y, long double)
156
157 /* fdlibm kernel functions */
158
159 int    __rem_pio2_large(double*,double*,int,int,int);
160
161 int    __rem_pio2(double,double*);
162 double __sin(double,double,int);
163 double __cos(double,double);
164 double __tan(double,double,int);
165 double __expo2(double);
166 double complex __ldexp_cexp(double complex,int);
167
168 int    __rem_pio2f(float,double*);
169 float  __sindf(double);
170 float  __cosdf(double);
171 float  __tandf(double,int);
172 float  __expo2f(float);
173 float complex __ldexp_cexpf(float complex,int);
174
175 int __rem_pio2l(long double, long double *);
176 long double __sinl(long double, long double, int);
177 long double __cosl(long double, long double);
178 long double __tanl(long double, long double, int);
179
180 /* polynomial evaluation */
181 long double __polevll(long double, const long double *, int);
182 long double __p1evll(long double, const long double *, int);
183
184 #endif