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| Rev | Author | Line No. | Line |
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| 4973 | right-hear | 1 | /* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */ |
| 2 | /* |
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| 3 | * ==================================================== |
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| 4 | * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. |
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| 5 | * |
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| 6 | * Developed at SunPro, a Sun Microsystems, Inc. business. |
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| 7 | * Permission to use, copy, modify, and distribute this |
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| 8 | * software is freely granted, provided that this notice |
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| 9 | * is preserved. |
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| 10 | * ==================================================== |
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| 11 | */ |
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| 12 | |||
| 13 | /* |
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| 14 | * from: @(#)fdlibm.h 5.1 93/09/24 |
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| 15 | * $Id: math_private.h,v 1.2 1994/08/18 23:06:19 jtc Exp $ |
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| 16 | */ |
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| 17 | |||
| 18 | #ifndef _MATH_PRIVATE_H_ |
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| 19 | #define _MATH_PRIVATE_H_ |
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| 20 | |||
| 21 | #include |
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| 22 | |||
| 23 | #if !defined(__NetBSD__) && !defined(__FreeBSD__) |
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| 24 | typedef int int32_t; |
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| 25 | typedef unsigned int u_int32_t; |
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| 26 | #endif |
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| 27 | |||
| 28 | /* The original fdlibm code used statements like: |
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| 29 | n0 = ((*(int*)&one)>>29)^1; * index of high word * |
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| 30 | ix0 = *(n0+(int*)&x); * high word of x * |
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| 31 | ix1 = *((1-n0)+(int*)&x); * low word of x * |
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| 32 | to dig two 32 bit words out of the 64 bit IEEE floating point |
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| 33 | value. That is non-ANSI, and, moreover, the gcc instruction |
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| 34 | scheduler gets it wrong. We instead use the following macros. |
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| 35 | Unlike the original code, we determine the endianness at compile |
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| 36 | time, not at run time; I don't see much benefit to selecting |
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| 37 | endianness at run time. */ |
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| 38 | |||
| 39 | /* A union which permits us to convert between a double and two 32 bit |
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| 40 | ints. */ |
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| 41 | |||
| 42 | #if BYTE_ORDER == BIG_ENDIAN |
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| 43 | |||
| 44 | typedef union |
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| 45 | { |
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| 46 | double value; |
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| 47 | struct |
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| 48 | { |
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| 49 | u_int32_t msw; |
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| 50 | u_int32_t lsw; |
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| 51 | } parts; |
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| 52 | } ieee_double_shape_type; |
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| 53 | |||
| 54 | #endif |
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| 55 | |||
| 56 | #if BYTE_ORDER == LITTLE_ENDIAN |
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| 57 | |||
| 58 | typedef union |
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| 59 | { |
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| 60 | double value; |
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| 61 | struct |
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| 62 | { |
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| 63 | u_int32_t lsw; |
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| 64 | u_int32_t msw; |
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| 65 | } parts; |
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| 66 | } ieee_double_shape_type; |
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| 67 | |||
| 68 | #endif |
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| 69 | |||
| 70 | /* Get two 32 bit ints from a double. */ |
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| 71 | |||
| 72 | #define EXTRACT_WORDS(ix0,ix1,d) \ |
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| 73 | do { \ |
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| 74 | ieee_double_shape_type ew_u; \ |
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| 75 | ew_u.value = (d); \ |
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| 76 | (ix0) = ew_u.parts.msw; \ |
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| 77 | (ix1) = ew_u.parts.lsw; \ |
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| 78 | } while (0) |
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| 79 | |||
| 80 | /* Get the more significant 32 bit int from a double. */ |
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| 81 | |||
| 82 | #define GET_HIGH_WORD(i,d) \ |
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| 83 | do { \ |
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| 84 | ieee_double_shape_type gh_u; \ |
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| 85 | gh_u.value = (d); \ |
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| 86 | (i) = gh_u.parts.msw; \ |
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| 87 | } while (0) |
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| 88 | |||
| 89 | /* Get the less significant 32 bit int from a double. */ |
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| 90 | |||
| 91 | #define GET_LOW_WORD(i,d) \ |
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| 92 | do { \ |
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| 93 | ieee_double_shape_type gl_u; \ |
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| 94 | gl_u.value = (d); \ |
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| 95 | (i) = gl_u.parts.lsw; \ |
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| 96 | } while (0) |
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| 97 | |||
| 98 | /* Set a double from two 32 bit ints. */ |
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| 99 | |||
| 100 | #define INSERT_WORDS(d,ix0,ix1) \ |
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| 101 | do { \ |
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| 102 | ieee_double_shape_type iw_u; \ |
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| 103 | iw_u.parts.msw = (ix0); \ |
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| 104 | iw_u.parts.lsw = (ix1); \ |
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| 105 | (d) = iw_u.value; \ |
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| 106 | } while (0) |
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| 107 | |||
| 108 | /* Set the more significant 32 bits of a double from an int. */ |
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| 109 | |||
| 110 | #define SET_HIGH_WORD(d,v) \ |
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| 111 | do { \ |
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| 112 | ieee_double_shape_type sh_u; \ |
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| 113 | sh_u.value = (d); \ |
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| 114 | sh_u.parts.msw = (v); \ |
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| 115 | (d) = sh_u.value; \ |
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| 116 | } while (0) |
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| 117 | |||
| 118 | /* Set the less significant 32 bits of a double from an int. */ |
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| 119 | |||
| 120 | #define SET_LOW_WORD(d,v) \ |
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| 121 | do { \ |
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| 122 | ieee_double_shape_type sl_u; \ |
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| 123 | sl_u.value = (d); \ |
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| 124 | sl_u.parts.lsw = (v); \ |
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| 125 | (d) = sl_u.value; \ |
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| 126 | } while (0) |
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| 127 | |||
| 128 | /* A union which permits us to convert between a float and a 32 bit |
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| 129 | int. */ |
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| 130 | |||
| 131 | typedef union |
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| 132 | { |
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| 133 | float value; |
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| 134 | /* FIXME: Assumes 32 bit int. */ |
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| 135 | unsigned int word; |
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| 136 | } ieee_float_shape_type; |
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| 137 | |||
| 138 | /* Get a 32 bit int from a float. */ |
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| 139 | |||
| 140 | #define GET_FLOAT_WORD(i,d) \ |
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| 141 | do { \ |
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| 142 | ieee_float_shape_type gf_u; \ |
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| 143 | gf_u.value = (d); \ |
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| 144 | (i) = gf_u.word; \ |
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| 145 | } while (0) |
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| 146 | |||
| 147 | /* Set a float from a 32 bit int. */ |
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| 148 | |||
| 149 | #define SET_FLOAT_WORD(d,i) \ |
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| 150 | do { \ |
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| 151 | ieee_float_shape_type sf_u; \ |
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| 152 | sf_u.word = (i); \ |
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| 153 | (d) = sf_u.value; \ |
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| 154 | } while (0) |
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| 155 | |||
| 156 | /* ieee style elementary functions */ |
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| 157 | extern double __ieee754_sqrt __P((double)); |
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| 158 | extern double __ieee754_acos __P((double)); |
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| 159 | extern double __ieee754_acosh __P((double)); |
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| 160 | extern double __ieee754_log __P((double)); |
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| 161 | extern double __ieee754_atanh __P((double)); |
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| 162 | extern double __ieee754_asin __P((double)); |
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| 163 | extern double __ieee754_atan2 __P((double,double)); |
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| 164 | extern double __ieee754_exp __P((double)); |
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| 165 | extern double __ieee754_cosh __P((double)); |
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| 166 | extern double __ieee754_fmod __P((double,double)); |
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| 167 | extern double __ieee754_pow __P((double,double)); |
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| 168 | extern double __ieee754_lgamma_r __P((double,int *)); |
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| 169 | extern double __ieee754_gamma_r __P((double,int *)); |
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| 170 | extern double __ieee754_lgamma __P((double)); |
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| 171 | extern double __ieee754_gamma __P((double)); |
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| 172 | extern double __ieee754_log10 __P((double)); |
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| 173 | extern double __ieee754_sinh __P((double)); |
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| 174 | extern double __ieee754_hypot __P((double,double)); |
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| 175 | extern double __ieee754_j0 __P((double)); |
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| 176 | extern double __ieee754_j1 __P((double)); |
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| 177 | extern double __ieee754_y0 __P((double)); |
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| 178 | extern double __ieee754_y1 __P((double)); |
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| 179 | extern double __ieee754_jn __P((int,double)); |
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| 180 | extern double __ieee754_yn __P((int,double)); |
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| 181 | extern double __ieee754_remainder __P((double,double)); |
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| 182 | extern int __ieee754_rem_pio2 __P((double,double*)); |
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| 183 | extern double __ieee754_scalb __P((double,double)); |
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| 184 | |||
| 185 | /* fdlibm kernel function */ |
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| 186 | extern double __kernel_standard __P((double,double,int)); |
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| 187 | extern double __kernel_sin __P((double,double,int)); |
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| 188 | extern double __kernel_cos __P((double,double)); |
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| 189 | extern double __kernel_tan __P((double,double,int)); |
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| 190 | extern int __kernel_rem_pio2 __P((double*,double*,int,int,int,const int*)); |
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| 191 | |||
| 192 | |||
| 193 | /* ieee style elementary float functions */ |
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| 194 | extern float __ieee754_sqrtf __P((float)); |
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| 195 | extern float __ieee754_acosf __P((float)); |
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| 196 | extern float __ieee754_acoshf __P((float)); |
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| 197 | extern float __ieee754_logf __P((float)); |
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| 198 | extern float __ieee754_atanhf __P((float)); |
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| 199 | extern float __ieee754_asinf __P((float)); |
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| 200 | extern float __ieee754_atan2f __P((float,float)); |
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| 201 | extern float __ieee754_expf __P((float)); |
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| 202 | extern float __ieee754_coshf __P((float)); |
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| 203 | extern float __ieee754_fmodf __P((float,float)); |
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| 204 | extern float __ieee754_powf __P((float,float)); |
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| 205 | extern float __ieee754_lgammaf_r __P((float,int *)); |
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| 206 | extern float __ieee754_gammaf_r __P((float,int *)); |
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| 207 | extern float __ieee754_lgammaf __P((float)); |
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| 208 | extern float __ieee754_gammaf __P((float)); |
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| 209 | extern float __ieee754_log10f __P((float)); |
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| 210 | extern float __ieee754_sinhf __P((float)); |
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| 211 | extern float __ieee754_hypotf __P((float,float)); |
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| 212 | extern float __ieee754_j0f __P((float)); |
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| 213 | extern float __ieee754_j1f __P((float)); |
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| 214 | extern float __ieee754_y0f __P((float)); |
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| 215 | extern float __ieee754_y1f __P((float)); |
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| 216 | extern float __ieee754_jnf __P((int,float)); |
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| 217 | extern float __ieee754_ynf __P((int,float)); |
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| 218 | extern float __ieee754_remainderf __P((float,float)); |
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| 219 | extern int __ieee754_rem_pio2f __P((float,float*)); |
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| 220 | extern float __ieee754_scalbf __P((float,float)); |
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| 221 | |||
| 222 | /* float versions of fdlibm kernel functions */ |
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| 223 | extern float __kernel_sinf __P((float,float,int)); |
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| 224 | extern float __kernel_cosf __P((float,float)); |
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| 225 | extern float __kernel_tanf __P((float,float,int)); |
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| 226 | extern int __kernel_rem_pio2f __P((float*,float*,int,int,int,const int*)); |
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| 227 | |||
| 228 | #endif /* _MATH_PRIVATE_H_ */ |