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 // ANDROID 20 //#include <complex.h> 21 #include <endian.h> 22 23 #if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024 24 #elif LDBL_MANT_DIG == 64 && LDBL_MAX_EXP == 16384 && __BYTE_ORDER == __LITTLE_ENDIAN 25 union ldshape { 26 long double f; 27 struct { 28 uint64_t m; 29 uint16_t se; 30 } i; 31 }; 32 #elif LDBL_MANT_DIG == 113 && LDBL_MAX_EXP == 16384 && __BYTE_ORDER == __LITTLE_ENDIAN 33 union ldshape { 34 long double f; 35 struct { 36 uint64_t lo; 37 uint32_t mid; 38 uint16_t top; 39 uint16_t se; 40 } i; 41 struct { 42 uint64_t lo; 43 uint64_t hi; 44 } i2; 45 }; 46 #else 47 #error Unsupported long double representation 48 #endif 49 50 #define FORCE_EVAL(x) do { \ 51 if (sizeof(x) == sizeof(float)) { \ 52 volatile float __x; \ 53 __x = (x); \ 54 } else if (sizeof(x) == sizeof(double)) { \ 55 volatile double __x; \ 56 __x = (x); \ 57 } else { \ 58 volatile long double __x; \ 59 __x = (x); \ 60 } \ 61 } while(0) 62 63 /* Get two 32 bit ints from a double. */ 64 #define EXTRACT_WORDS(hi,lo,d) \ 65 do { \ 66 union {double f; uint64_t i;} __u; \ 67 __u.f = (d); \ 68 (hi) = __u.i >> 32; \ 69 (lo) = (uint32_t)__u.i; \ 70 } while (0) 71 72 /* Get the more significant 32 bit int from a double. */ 73 #define GET_HIGH_WORD(hi,d) \ 74 do { \ 75 union {double f; uint64_t i;} __u; \ 76 __u.f = (d); \ 77 (hi) = __u.i >> 32; \ 78 } while (0) 79 80 /* Get the less significant 32 bit int from a double. */ 81 #define GET_LOW_WORD(lo,d) \ 82 do { \ 83 union {double f; uint64_t i;} __u; \ 84 __u.f = (d); \ 85 (lo) = (uint32_t)__u.i; \ 86 } while (0) 87 88 /* Set a double from two 32 bit ints. */ 89 #define INSERT_WORDS(d,hi,lo) \ 90 do { \ 91 union {double f; uint64_t i;} __u; \ 92 __u.i = ((uint64_t)(hi)<<32) | (uint32_t)(lo); \ 93 (d) = __u.f; \ 94 } while (0) 95 96 /* Set the more significant 32 bits of a double from an int. */ 97 #define SET_HIGH_WORD(d,hi) \ 98 do { \ 99 union {double f; uint64_t i;} __u; \ 100 __u.f = (d); \ 101 __u.i &= 0xffffffff; \ 102 __u.i |= (uint64_t)(hi) << 32; \ 103 (d) = __u.f; \ 104 } while (0) 105 106 /* Set the less significant 32 bits of a double from an int. */ 107 #define SET_LOW_WORD(d,lo) \ 108 do { \ 109 union {double f; uint64_t i;} __u; \ 110 __u.f = (d); \ 111 __u.i &= 0xffffffff00000000ull; \ 112 __u.i |= (uint32_t)(lo); \ 113 (d) = __u.f; \ 114 } while (0) 115 116 /* Get a 32 bit int from a float. */ 117 #define GET_FLOAT_WORD(w,d) \ 118 do { \ 119 union {float f; uint32_t i;} __u; \ 120 __u.f = (d); \ 121 (w) = __u.i; \ 122 } while (0) 123 124 /* Set a float from a 32 bit int. */ 125 #define SET_FLOAT_WORD(d,w) \ 126 do { \ 127 union {float f; uint32_t i;} __u; \ 128 __u.i = (w); \ 129 (d) = __u.f; \ 130 } while (0) 131 132 /* fdlibm kernel functions */ 133 134 int __rem_pio2_large(double*,double*,int,int,int); 135 136 int __rem_pio2(double,double*); 137 double __sin(double,double,int); 138 double __cos(double,double); 139 double __tan(double,double,int); 140 double __expo2(double); 141 // ANDROID 142 //double complex __ldexp_cexp(double complex,int); 143 144 int __rem_pio2f(float,double*); 145 float __sindf(double); 146 float __cosdf(double); 147 float __tandf(double,int); 148 float __expo2f(float); 149 // ANDROID 150 //float complex __ldexp_cexpf(float complex,int); 151 152 int __rem_pio2l(long double, long double *); 153 long double __sinl(long double, long double, int); 154 long double __cosl(long double, long double); 155 long double __tanl(long double, long double, int); 156 157 /* polynomial evaluation */ 158 long double __polevll(long double, const long double *, int); 159 long double __p1evll(long double, const long double *, int); 160 161 #endif 162