2 * ====================================================
3 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
5 * Developed at SunPro, a Sun Microsystems, Inc. business.
6 * Permission to use, copy, modify, and distribute this
7 * software is freely granted, provided that this notice
9 * ====================================================
13 * from: @(#)fdlibm.h 5.1 93/09/24
17 #ifndef _MATH_PRIVATE_H_
18 #define _MATH_PRIVATE_H_
20 #include <sys/types.h>
21 #include <machine/endian.h>
24 * The original fdlibm code used statements like:
25 * n0 = ((*(int*)&one)>>29)^1; * index of high word *
26 * ix0 = *(n0+(int*)&x); * high word of x *
27 * ix1 = *((1-n0)+(int*)&x); * low word of x *
28 * to dig two 32 bit words out of the 64 bit IEEE floating point
29 * value. That is non-ANSI, and, moreover, the gcc instruction
30 * scheduler gets it wrong. We instead use the following macros.
31 * Unlike the original code, we determine the endianness at compile
32 * time, not at run time; I don't see much benefit to selecting
33 * endianness at run time.
37 * A union which permits us to convert between a double and two 32 bit
42 #if defined(__VFP_FP__)
43 #define IEEE_WORD_ORDER BYTE_ORDER
45 #define IEEE_WORD_ORDER BIG_ENDIAN
48 #define IEEE_WORD_ORDER BYTE_ORDER
51 #if IEEE_WORD_ORDER == BIG_ENDIAN
65 } ieee_double_shape_type;
69 #if IEEE_WORD_ORDER == LITTLE_ENDIAN
83 } ieee_double_shape_type;
87 /* Get two 32 bit ints from a double. */
89 #define EXTRACT_WORDS(ix0,ix1,d) \
91 ieee_double_shape_type ew_u; \
93 (ix0) = ew_u.parts.msw; \
94 (ix1) = ew_u.parts.lsw; \
97 /* Get a 64-bit int from a double. */
98 #define EXTRACT_WORD64(ix,d) \
100 ieee_double_shape_type ew_u; \
102 (ix) = ew_u.xparts.w; \
105 /* Get the more significant 32 bit int from a double. */
107 #define GET_HIGH_WORD(i,d) \
109 ieee_double_shape_type gh_u; \
111 (i) = gh_u.parts.msw; \
114 /* Get the less significant 32 bit int from a double. */
116 #define GET_LOW_WORD(i,d) \
118 ieee_double_shape_type gl_u; \
120 (i) = gl_u.parts.lsw; \
123 /* Set a double from two 32 bit ints. */
125 #define INSERT_WORDS(d,ix0,ix1) \
127 ieee_double_shape_type iw_u; \
128 iw_u.parts.msw = (ix0); \
129 iw_u.parts.lsw = (ix1); \
133 /* Set a double from a 64-bit int. */
134 #define INSERT_WORD64(d,ix) \
136 ieee_double_shape_type iw_u; \
137 iw_u.xparts.w = (ix); \
141 /* Set the more significant 32 bits of a double from an int. */
143 #define SET_HIGH_WORD(d,v) \
145 ieee_double_shape_type sh_u; \
147 sh_u.parts.msw = (v); \
151 /* Set the less significant 32 bits of a double from an int. */
153 #define SET_LOW_WORD(d,v) \
155 ieee_double_shape_type sl_u; \
157 sl_u.parts.lsw = (v); \
162 * A union which permits us to convert between a float and a 32 bit
169 /* FIXME: Assumes 32 bit int. */
171 } ieee_float_shape_type;
173 /* Get a 32 bit int from a float. */
175 #define GET_FLOAT_WORD(i,d) \
177 ieee_float_shape_type gf_u; \
182 /* Set a float from a 32 bit int. */
184 #define SET_FLOAT_WORD(d,i) \
186 ieee_float_shape_type sf_u; \
191 /* Get expsign as a 16 bit int from a long double. */
193 #define GET_LDBL_EXPSIGN(i,d) \
195 union IEEEl2bits ge_u; \
197 (i) = ge_u.xbits.expsign; \
200 /* Set expsign of a long double from a 16 bit int. */
202 #define SET_LDBL_EXPSIGN(d,v) \
204 union IEEEl2bits se_u; \
206 se_u.xbits.expsign = (v); \
210 /* Long double constants are broken on i386. This workaround is OK always. */
211 #define LD80C(m, ex, s, v) { \
212 /* .e = v, */ /* overwritten */ \
213 .xbits.man = __CONCAT(m, ULL), \
214 .xbits.expsign = (0x3fff + (ex)) | ((s) ? 0x8000 : 0), \
217 #ifdef FLT_EVAL_METHOD
219 * Attempt to get strict C99 semantics for assignment with non-C99 compilers.
221 #if FLT_EVAL_METHOD == 0 || __GNUC__ == 0
222 #define STRICT_ASSIGN(type, lval, rval) ((lval) = (rval))
224 #define STRICT_ASSIGN(type, lval, rval) do { \
225 volatile type __lval; \
227 if (sizeof(type) >= sizeof(double)) \
235 #endif /* FLT_EVAL_METHOD */
237 /* Support switching the mode to FP_PE if necessary. */
238 #if defined(__i386__) && !defined(NO_FPSETPREC)
240 long double __retval; \
243 if ((__oprec = fpgetprec()) != FP_PE) \
245 #define RETURNI(x) do { \
247 if (__oprec != FP_PE) \
248 fpsetprec(__oprec); \
253 #define RETURNI(x) RETURNF(x)
256 /* Default return statement if hack*_t() is not used. */
257 #define RETURNF(v) return (v)
260 * Common routine to process the arguments to nan(), nanf(), and nanl().
262 void _scan_nan(uint32_t *__words, int __num_words, const char *__s);
267 * C99 specifies that complex numbers have the same representation as
268 * an array of two elements, where the first element is the real part
269 * and the second element is the imaginary part.
280 long double complex f;
282 } long_double_complex;
283 #define REALPART(z) ((z).a[0])
284 #define IMAGPART(z) ((z).a[1])
287 * Inline functions that can be used to construct complex values.
289 * The C99 standard intends x+I*y to be used for this, but x+I*y is
290 * currently unusable in general since gcc introduces many overflow,
291 * underflow, sign and efficiency bugs by rewriting I*y as
292 * (0.0+I)*(y+0.0*I) and laboriously computing the full complex product.
293 * In particular, I*Inf is corrupted to NaN+I*Inf, and I*-0 is corrupted
296 static __inline float complex
297 cpackf(float x, float y)
306 static __inline double complex
307 cpack(double x, double y)
316 static __inline long double complex
317 cpackl(long double x, long double y)
319 long_double_complex z;
325 #endif /* _COMPLEX_H */
327 #ifdef __GNUCLIKE_ASM
329 /* Asm versions of some functions. */
337 asm("cvtsd2si %1,%0" : "=r" (n) : "x" (x));
340 #define HAVE_EFFICIENT_IRINT
349 asm("fistl %0" : "=m" (n) : "t" (x));
352 #define HAVE_EFFICIENT_IRINT
355 #if defined(__amd64__) || defined(__i386__)
357 irintl(long double x)
361 asm("fistl %0" : "=m" (n) : "t" (x));
364 #define HAVE_EFFICIENT_IRINTL
367 #endif /* __GNUCLIKE_ASM */
370 * ieee style elementary functions
372 * We rename functions here to improve other sources' diffability
375 #define __ieee754_sqrt sqrt
376 #define __ieee754_acos acos
377 #define __ieee754_acosh acosh
378 #define __ieee754_log log
379 #define __ieee754_log2 log2
380 #define __ieee754_atanh atanh
381 #define __ieee754_asin asin
382 #define __ieee754_atan2 atan2
383 #define __ieee754_exp exp
384 #define __ieee754_cosh cosh
385 #define __ieee754_fmod fmod
386 #define __ieee754_pow pow
387 #define __ieee754_lgamma lgamma
388 #define __ieee754_gamma gamma
389 #define __ieee754_lgamma_r lgamma_r
390 #define __ieee754_gamma_r gamma_r
391 #define __ieee754_log10 log10
392 #define __ieee754_sinh sinh
393 #define __ieee754_hypot hypot
394 #define __ieee754_j0 j0
395 #define __ieee754_j1 j1
396 #define __ieee754_y0 y0
397 #define __ieee754_y1 y1
398 #define __ieee754_jn jn
399 #define __ieee754_yn yn
400 #define __ieee754_remainder remainder
401 #define __ieee754_scalb scalb
402 #define __ieee754_sqrtf sqrtf
403 #define __ieee754_acosf acosf
404 #define __ieee754_acoshf acoshf
405 #define __ieee754_logf logf
406 #define __ieee754_atanhf atanhf
407 #define __ieee754_asinf asinf
408 #define __ieee754_atan2f atan2f
409 #define __ieee754_expf expf
410 #define __ieee754_coshf coshf
411 #define __ieee754_fmodf fmodf
412 #define __ieee754_powf powf
413 #define __ieee754_lgammaf lgammaf
414 #define __ieee754_gammaf gammaf
415 #define __ieee754_lgammaf_r lgammaf_r
416 #define __ieee754_gammaf_r gammaf_r
417 #define __ieee754_log10f log10f
418 #define __ieee754_log2f log2f
419 #define __ieee754_sinhf sinhf
420 #define __ieee754_hypotf hypotf
421 #define __ieee754_j0f j0f
422 #define __ieee754_j1f j1f
423 #define __ieee754_y0f y0f
424 #define __ieee754_y1f y1f
425 #define __ieee754_jnf jnf
426 #define __ieee754_ynf ynf
427 #define __ieee754_remainderf remainderf
428 #define __ieee754_scalbf scalbf
430 /* fdlibm kernel function */
431 int __kernel_rem_pio2(double*,double*,int,int,int);
433 /* double precision kernel functions */
434 #ifndef INLINE_REM_PIO2
435 int __ieee754_rem_pio2(double,double*);
437 double __kernel_sin(double,double,int);
438 double __kernel_cos(double,double);
439 double __kernel_tan(double,double,int);
440 double __ldexp_exp(double,int);
442 double complex __ldexp_cexp(double complex,int);
445 /* float precision kernel functions */
446 #ifndef INLINE_REM_PIO2F
447 int __ieee754_rem_pio2f(float,double*);
449 #ifndef INLINE_KERNEL_SINDF
450 float __kernel_sindf(double);
452 #ifndef INLINE_KERNEL_COSDF
453 float __kernel_cosdf(double);
455 #ifndef INLINE_KERNEL_TANDF
456 float __kernel_tandf(double,int);
458 float __ldexp_expf(float,int);
460 float complex __ldexp_cexpf(float complex,int);
463 /* long double precision kernel functions */
464 long double __kernel_sinl(long double, long double, int);
465 long double __kernel_cosl(long double, long double);
466 long double __kernel_tanl(long double, long double, int);
468 #endif /* !_MATH_PRIVATE_H_ */