2 /* @(#)fdlibm.h 5.1 93/09/24 */
4 * ====================================================
5 * Copyright (C) 1993, 2000 by Sun Microsystems, Inc. All rights reserved.
7 * Developed at SunPro, a Sun Microsystems, Inc. business.
8 * Permission to use, copy, modify, and distribute this
9 * software is freely granted, provided that this notice
11 * ====================================================
14 #ifndef __CLASSPATH_FDLIBM_H__
15 #define __CLASSPATH_FDLIBM_H__
17 /* AIX needs _XOPEN_SOURCE */
25 /* GCJ LOCAL: Include files. */
30 /* CYGNUS LOCAL: Default to XOPEN_MODE. */
44 #define HUGE ((float)3.40282346638528860e+38)
48 * set X_TLOSS = pi*2**52, which is possibly defined in <values.h>
49 * (one may replace the following line by "#include <values.h>")
52 #define X_TLOSS 1.41484755040568800000e+16
54 /* These typedefs are true for the targets running Java. */
65 extern double acos __P((double));
66 extern double asin __P((double));
67 extern double atan __P((double));
68 extern double atan2 __P((double, double));
69 extern double cos __P((double));
70 extern double sin __P((double));
71 extern double tan __P((double));
73 extern double cosh __P((double));
74 extern double sinh __P((double));
75 extern double tanh __P((double));
77 extern double exp __P((double));
78 extern double frexp __P((double, int *));
79 extern double ldexp __P((double, int));
80 extern double log __P((double));
81 extern double log10 __P((double));
82 extern double modf __P((double, double *));
84 extern double pow __P((double, double));
85 extern double sqrt __P((double));
87 extern double ceil __P((double));
88 extern double fabs __P((double));
89 extern double floor __P((double));
90 extern double fmod __P((double, double));
92 extern double erf __P((double));
93 extern double erfc __P((double));
94 extern double gamma __P((double));
95 extern double hypot __P((double, double));
96 extern int isnan __P((double));
97 extern int finite __P((double));
98 extern double j0 __P((double));
99 extern double j1 __P((double));
100 extern double jn __P((int, double));
101 extern double lgamma __P((double));
102 extern double y0 __P((double));
103 extern double y1 __P((double));
104 extern double yn __P((int, double));
106 extern double acosh __P((double));
107 extern double asinh __P((double));
108 extern double atanh __P((double));
109 extern double cbrt __P((double));
110 extern double logb __P((double));
111 extern double nextafter __P((double, double));
112 extern double remainder __P((double, double));
114 /* Functions that are not documented, and are not in <math.h>. */
116 extern double logb __P((double));
118 extern double scalb __P((double, int));
120 extern double scalb __P((double, double));
122 extern double significand __P((double));
124 /* ieee style elementary functions */
125 extern double __ieee754_sqrt __P((double));
126 extern double __ieee754_acos __P((double));
127 extern double __ieee754_acosh __P((double));
128 extern double __ieee754_log __P((double));
129 extern double __ieee754_atanh __P((double));
130 extern double __ieee754_asin __P((double));
131 extern double __ieee754_atan2 __P((double,double));
132 extern double __ieee754_exp __P((double));
133 extern double __ieee754_cosh __P((double));
134 extern double __ieee754_fmod __P((double,double));
135 extern double __ieee754_pow __P((double,double));
136 extern double __ieee754_lgamma_r __P((double,int *));
137 extern double __ieee754_gamma_r __P((double,int *));
138 extern double __ieee754_log10 __P((double));
139 extern double __ieee754_sinh __P((double));
140 extern double __ieee754_hypot __P((double,double));
141 extern double __ieee754_j0 __P((double));
142 extern double __ieee754_j1 __P((double));
143 extern double __ieee754_y0 __P((double));
144 extern double __ieee754_y1 __P((double));
145 extern double __ieee754_jn __P((int,double));
146 extern double __ieee754_yn __P((int,double));
147 extern double __ieee754_remainder __P((double,double));
148 extern int32_t __ieee754_rem_pio2 __P((double,double*));
150 extern double __ieee754_scalb __P((double,int));
152 extern double __ieee754_scalb __P((double,double));
155 /* fdlibm kernel function */
156 extern double __kernel_standard __P((double,double,int));
157 extern double __kernel_sin __P((double,double,int));
158 extern double __kernel_cos __P((double,double));
159 extern double __kernel_tan __P((double,double,int));
160 extern int __kernel_rem_pio2 __P((double*,double*,int,int,int,const int32_t*));
162 /* Undocumented float functions. */
163 extern float logbf __P((float));
165 extern float scalbf __P((float, int));
167 extern float scalbf __P((float, float));
169 extern float significandf __P((float));
172 * Functions callable from C, intended to support IEEE arithmetic.
174 extern double copysign __P((double, double));
175 extern int ilogb __P((double));
176 extern double rint __P((double));
177 extern float rintf __P((float));
178 extern double scalbn __P((double, int));
180 /* ieee style elementary float functions */
181 extern float __ieee754_sqrtf __P((float));
182 extern float __ieee754_acosf __P((float));
183 extern float __ieee754_acoshf __P((float));
184 extern float __ieee754_logf __P((float));
185 extern float __ieee754_atanhf __P((float));
186 extern float __ieee754_asinf __P((float));
187 extern float __ieee754_atan2f __P((float,float));
188 extern float __ieee754_expf __P((float));
189 extern float __ieee754_coshf __P((float));
190 extern float __ieee754_fmodf __P((float,float));
191 extern float __ieee754_powf __P((float,float));
192 extern float __ieee754_lgammaf_r __P((float,int *));
193 extern float __ieee754_gammaf_r __P((float,int *));
194 extern float __ieee754_log10f __P((float));
195 extern float __ieee754_sinhf __P((float));
196 extern float __ieee754_hypotf __P((float,float));
197 extern float __ieee754_j0f __P((float));
198 extern float __ieee754_j1f __P((float));
199 extern float __ieee754_y0f __P((float));
200 extern float __ieee754_y1f __P((float));
201 extern float __ieee754_jnf __P((int,float));
202 extern float __ieee754_ynf __P((int,float));
203 extern float __ieee754_remainderf __P((float,float));
204 extern int32_t __ieee754_rem_pio2f __P((float,float*));
206 extern float __ieee754_scalbf __P((float,int));
208 extern float __ieee754_scalbf __P((float,float));
211 /* float versions of fdlibm kernel functions */
212 extern float __kernel_sinf __P((float,float,int));
213 extern float __kernel_cosf __P((float,float));
214 extern float __kernel_tanf __P((float,float,int));
215 extern int __kernel_rem_pio2f __P((float*,float*,int,int,int,const int32_t*));
217 /* The original code used statements like
218 n0 = ((*(int*)&one)>>29)^1; * index of high word *
219 ix0 = *(n0+(int*)&x); * high word of x *
220 ix1 = *((1-n0)+(int*)&x); * low word of x *
221 to dig two 32 bit words out of the 64 bit IEEE floating point
222 value. That is non-ANSI, and, moreover, the gcc instruction
223 scheduler gets it wrong. We instead use the following macros.
224 Unlike the original code, we determine the endianness at compile
225 time, not at run time; I don't see much benefit to selecting
226 endianness at run time. */
228 #ifndef __IEEE_BIG_ENDIAN
229 #ifndef __IEEE_LITTLE_ENDIAN
230 #error Must define endianness
234 /* A union which permits us to convert between a double and two 32 bit
237 #ifdef __IEEE_BIG_ENDIAN
247 } ieee_double_shape_type;
251 #ifdef __IEEE_LITTLE_ENDIAN
261 } ieee_double_shape_type;
265 /* Get two 32 bit ints from a double. */
267 #define EXTRACT_WORDS(ix0,ix1,d) \
269 ieee_double_shape_type ew_u; \
271 (ix0) = ew_u.parts.msw; \
272 (ix1) = ew_u.parts.lsw; \
275 /* Get the more significant 32 bit int from a double. */
277 #define GET_HIGH_WORD(i,d) \
279 ieee_double_shape_type gh_u; \
281 (i) = gh_u.parts.msw; \
284 /* Get the less significant 32 bit int from a double. */
286 #define GET_LOW_WORD(i,d) \
288 ieee_double_shape_type gl_u; \
290 (i) = gl_u.parts.lsw; \
293 /* Set a double from two 32 bit ints. */
295 #define INSERT_WORDS(d,ix0,ix1) \
297 ieee_double_shape_type iw_u; \
298 iw_u.parts.msw = (ix0); \
299 iw_u.parts.lsw = (ix1); \
303 /* Set the more significant 32 bits of a double from an int. */
305 #define SET_HIGH_WORD(d,v) \
307 ieee_double_shape_type sh_u; \
309 sh_u.parts.msw = (v); \
313 /* Set the less significant 32 bits of a double from an int. */
315 #define SET_LOW_WORD(d,v) \
317 ieee_double_shape_type sl_u; \
319 sl_u.parts.lsw = (v); \
323 /* A union which permits us to convert between a float and a 32 bit
330 } ieee_float_shape_type;
332 /* Get a 32 bit int from a float. */
334 #define GET_FLOAT_WORD(i,d) \
336 ieee_float_shape_type gf_u; \
341 /* Set a float from a 32 bit int. */
343 #define SET_FLOAT_WORD(d,i) \
345 ieee_float_shape_type sf_u; \
354 #endif /* __CLASSPATH_FDLIBM_H__ */