277 lines
6.4 KiB
C
277 lines
6.4 KiB
C
/*
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* ====================================================
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* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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*
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* Developed at SunPro, a Sun Microsystems, Inc. business.
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* Permission to use, copy, modify, and distribute this
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* software is freely granted, provided that this notice
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* is preserved.
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* ====================================================
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*/
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/*
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* from: @(#)fdlibm.h 5.1 93/09/24
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* $FreeBSD: src/lib/msun/src/math_private.h,v 1.17.2.2 2007/06/13 18:17:25 bde Exp $
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*/
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#ifndef _MATH_PRIVATE_H_
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#define _MATH_PRIVATE_H_
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#include <sys/types.h>
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#include <net/hton.h>
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/*
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* The original fdlibm code used statements like:
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* n0 = ((*(int*)&one)>>29)^1; * index of high word *
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* ix0 = *(n0+(int*)&x); * high word of x *
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* ix1 = *((1-n0)+(int*)&x); * low word of x *
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* to dig two 32 bit words out of the 64 bit IEEE floating point
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* value. That is non-ANSI, and, moreover, the gcc instruction
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* scheduler gets it wrong. We instead use the following macros.
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* Unlike the original code, we determine the endianness at compile
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* time, not at run time; I don't see much benefit to selecting
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* endianness at run time.
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*/
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/*
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* A union which permits us to convert between a double and two 32 bit
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* ints.
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*/
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#if BIG_ENDIAN
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typedef union
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{
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double value;
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struct
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{
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u32_t msw;
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u32_t lsw;
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} parts;
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} ieee_double_shape_type;
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#endif
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#if LITTLE_ENDIAN
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typedef union
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{
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double value;
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struct
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{
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u32_t lsw;
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u32_t msw;
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} parts;
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} ieee_double_shape_type;
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#endif
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/* Get two 32 bit ints from a double. */
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#define EXTRACT_WORDS(ix0,ix1,d) \
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do { \
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ieee_double_shape_type ew_u; \
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ew_u.value = (d); \
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(ix0) = ew_u.parts.msw; \
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(ix1) = ew_u.parts.lsw; \
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} while (0)
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/* Get the more significant 32 bit int from a double. */
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#define GET_HIGH_WORD(i,d) \
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do { \
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ieee_double_shape_type gh_u; \
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gh_u.value = (d); \
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(i) = gh_u.parts.msw; \
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} while (0)
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/* Get the less significant 32 bit int from a double. */
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#define GET_LOW_WORD(i,d) \
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do { \
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ieee_double_shape_type gl_u; \
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gl_u.value = (d); \
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(i) = gl_u.parts.lsw; \
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} while (0)
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/* Set a double from two 32 bit ints. */
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#define INSERT_WORDS(d,ix0,ix1) \
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do { \
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ieee_double_shape_type iw_u; \
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iw_u.parts.msw = (ix0); \
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iw_u.parts.lsw = (ix1); \
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(d) = iw_u.value; \
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} while (0)
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/* Set the more significant 32 bits of a double from an int. */
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#define SET_HIGH_WORD(d,v) \
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do { \
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ieee_double_shape_type sh_u; \
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sh_u.value = (d); \
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sh_u.parts.msw = (v); \
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(d) = sh_u.value; \
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} while (0)
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/* Set the less significant 32 bits of a double from an int. */
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#define SET_LOW_WORD(d,v) \
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do { \
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ieee_double_shape_type sl_u; \
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sl_u.value = (d); \
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sl_u.parts.lsw = (v); \
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(d) = sl_u.value; \
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} while (0)
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/*
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* A union which permits us to convert between a float and a 32 bit
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* int.
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*/
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typedef union
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{
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float value;
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/* FIXME: Assumes 32 bit int. */
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unsigned int word;
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} ieee_float_shape_type;
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/* Get a 32 bit int from a float. */
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#define GET_FLOAT_WORD(i,d) \
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do { \
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ieee_float_shape_type gf_u; \
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gf_u.value = (d); \
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(i) = gf_u.word; \
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} while (0)
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/* Set a float from a 32 bit int. */
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#define SET_FLOAT_WORD(d,i) \
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do { \
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ieee_float_shape_type sf_u; \
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sf_u.word = (i); \
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(d) = sf_u.value; \
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} while (0)
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#if 0
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#ifdef _COMPLEX_H
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/*
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* Inline functions that can be used to construct complex values.
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*
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* The C99 standard intends x+I*y to be used for this, but x+I*y is
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* currently unusable in general since gcc introduces many overflow,
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* underflow, sign and efficiency bugs by rewriting I*y as
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* (0.0+I)*(y+0.0*I) and laboriously computing the full complex product.
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* In particular, I*Inf is corrupted to NaN+I*Inf, and I*-0 is corrupted
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* to -0.0+I*0.0.
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*/
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static __inline float complex
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cpackf(float x, float y)
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{
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float complex z;
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__real__ z = x;
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__imag__ z = y;
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return (z);
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}
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static __inline double complex
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cpack(double x, double y)
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{
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double complex z;
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__real__ z = x;
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__imag__ z = y;
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return (z);
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}
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static __inline long double complex
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cpackl(long double x, long double y)
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{
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long double complex z;
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__real__ z = x;
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__imag__ z = y;
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return (z);
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}
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#endif /* _COMPLEX_H */
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/*
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* ieee style elementary functions
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*
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* We rename functions here to improve other sources' diffability
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* against fdlibm.
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*/
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#define __ieee754_sqrt sqrt
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#define __ieee754_acos acos
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#define __ieee754_acosh acosh
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#define __ieee754_log log
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#define __ieee754_atanh atanh
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#define __ieee754_asin asin
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#define __ieee754_atan2 atan2
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#define __ieee754_exp exp
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#define __ieee754_cosh cosh
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#define __ieee754_fmod fmod
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#define __ieee754_pow pow
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#define __ieee754_lgamma lgamma
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#define __ieee754_gamma gamma
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#define __ieee754_lgamma_r lgamma_r
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#define __ieee754_gamma_r gamma_r
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#define __ieee754_log10 log10
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#define __ieee754_sinh sinh
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#define __ieee754_hypot hypot
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#define __ieee754_j0 j0
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#define __ieee754_j1 j1
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#define __ieee754_y0 y0
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#define __ieee754_y1 y1
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#define __ieee754_jn jn
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#define __ieee754_yn yn
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#define __ieee754_remainder remainder
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#define __ieee754_scalb scalb
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#define __ieee754_sqrtf sqrtf
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#define __ieee754_acosf acosf
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#define __ieee754_acoshf acoshf
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#define __ieee754_logf logf
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#define __ieee754_atanhf atanhf
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#define __ieee754_asinf asinf
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#define __ieee754_atan2f atan2f
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#define __ieee754_expf expf
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#define __ieee754_coshf coshf
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#define __ieee754_fmodf fmodf
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#define __ieee754_powf powf
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#define __ieee754_lgammaf lgammaf
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#define __ieee754_gammaf gammaf
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#define __ieee754_lgammaf_r lgammaf_r
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#define __ieee754_gammaf_r gammaf_r
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#define __ieee754_log10f log10f
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#define __ieee754_sinhf sinhf
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#define __ieee754_hypotf hypotf
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#define __ieee754_j0f j0f
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#define __ieee754_j1f j1f
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#define __ieee754_y0f y0f
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#define __ieee754_y1f y1f
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#define __ieee754_jnf jnf
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#define __ieee754_ynf ynf
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#define __ieee754_remainderf remainderf
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#define __ieee754_scalbf scalbf
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/* fdlibm kernel function */
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int __ieee754_rem_pio2(double,double*);
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double __kernel_sin(double,double,int);
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double __kernel_cos(double,double);
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double __kernel_tan(double,double,int);
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int __kernel_rem_pio2(double*,double*,int,int,int,const int*);
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/* float versions of fdlibm kernel functions */
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int __ieee754_rem_pio2f(float,float*);
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float __kernel_sindf(double);
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float __kernel_cosdf(double);
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float __kernel_tandf(double,int);
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int __kernel_rem_pio2f(float*,float*,int,int,int,const int*);
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#endif
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#endif /* !_MATH_PRIVATE_H_ */
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