219 lines
4.8 KiB
C
219 lines
4.8 KiB
C
/* $OpenBSD: math_private.h,v 1.17 2014/06/02 19:31:17 kettenis Exp $ */
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/*
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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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*/
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#ifndef _MATH_PRIVATE_OPENBSD_H_
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#define _MATH_PRIVATE_OPENBSD_H_
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#if __FLOAT_WORD_ORDER__ == __ORDER_BIG_ENDIAN__
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typedef union
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{
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long double value;
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struct {
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u_int32_t mswhi;
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u_int32_t mswlo;
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u_int32_t lswhi;
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u_int32_t lswlo;
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} parts32;
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struct {
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u_int64_t msw;
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u_int64_t lsw;
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} parts64;
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} ieee_quad_shape_type;
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#endif
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#if __FLOAT_WORD_ORDER__ == __ORDER_LITTLE_ENDIAN__
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typedef union
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{
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long double value;
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struct {
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u_int32_t lswlo;
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u_int32_t lswhi;
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u_int32_t mswlo;
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u_int32_t mswhi;
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} parts32;
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struct {
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u_int64_t lsw;
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u_int64_t msw;
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} parts64;
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} ieee_quad_shape_type;
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#endif
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/* Get two 64 bit ints from a long double. */
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#define GET_LDOUBLE_WORDS64(ix0,ix1,d) \
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do { \
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ieee_quad_shape_type qw_u; \
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qw_u.value = (d); \
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(ix0) = qw_u.parts64.msw; \
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(ix1) = qw_u.parts64.lsw; \
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} while (0)
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/* Set a long double from two 64 bit ints. */
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#define SET_LDOUBLE_WORDS64(d,ix0,ix1) \
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do { \
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ieee_quad_shape_type qw_u; \
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qw_u.parts64.msw = (ix0); \
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qw_u.parts64.lsw = (ix1); \
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(d) = qw_u.value; \
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} while (0)
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/* Get the more significant 64 bits of a long double mantissa. */
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#define GET_LDOUBLE_MSW64(v,d) \
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do { \
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ieee_quad_shape_type sh_u; \
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sh_u.value = (d); \
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(v) = sh_u.parts64.msw; \
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} while (0)
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/* Set the more significant 64 bits of a long double mantissa from an int. */
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#define SET_LDOUBLE_MSW64(d,v) \
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do { \
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ieee_quad_shape_type sh_u; \
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sh_u.value = (d); \
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sh_u.parts64.msw = (v); \
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(d) = sh_u.value; \
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} while (0)
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/* Get the least significant 64 bits of a long double mantissa. */
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#define GET_LDOUBLE_LSW64(v,d) \
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do { \
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ieee_quad_shape_type sh_u; \
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sh_u.value = (d); \
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(v) = sh_u.parts64.lsw; \
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} while (0)
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/* A union which permits us to convert between a long double and
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three 32 bit ints. */
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#if __FLOAT_WORD_ORDER__ == __ORDER_BIG_ENDIAN__
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typedef union
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{
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long double value;
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struct {
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#ifdef __LP64__
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int padh:32;
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#endif
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int exp:16;
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int padl:16;
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u_int32_t msw;
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u_int32_t lsw;
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} parts;
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} ieee_extended_shape_type;
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#endif
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#if __FLOAT_WORD_ORDER__ == __ORDER_LITTLE_ENDIAN__
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typedef union
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{
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long double value;
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struct {
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u_int32_t lsw;
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u_int32_t msw;
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int exp:16;
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int padl:16;
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#ifdef __LP64__
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int padh:32;
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#endif
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} parts;
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} ieee_extended_shape_type;
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#endif
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/* Get three 32 bit ints from a double. */
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#define GET_LDOUBLE_WORDS(se,ix0,ix1,d) \
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do { \
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ieee_extended_shape_type ew_u; \
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ew_u.value = (d); \
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(se) = ew_u.parts.exp; \
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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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/* Set a double from two 32 bit ints. */
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#define SET_LDOUBLE_WORDS(d,se,ix0,ix1) \
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do { \
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ieee_extended_shape_type iw_u; \
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iw_u.parts.exp = (se); \
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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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/* Get the more significant 32 bits of a long double mantissa. */
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#define GET_LDOUBLE_MSW(v,d) \
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do { \
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ieee_extended_shape_type sh_u; \
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sh_u.value = (d); \
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(v) = sh_u.parts.msw; \
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} while (0)
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/* Set the more significant 32 bits of a long double mantissa from an int. */
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#define SET_LDOUBLE_MSW(d,v) \
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do { \
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ieee_extended_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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/* Get int from the exponent of a long double. */
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#define GET_LDOUBLE_EXP(se,d) \
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do { \
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ieee_extended_shape_type ge_u; \
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ge_u.value = (d); \
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(se) = ge_u.parts.exp; \
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} while (0)
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/* Set exponent of a long double from an int. */
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#define SET_LDOUBLE_EXP(d,se) \
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do { \
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ieee_extended_shape_type se_u; \
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se_u.value = (d); \
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se_u.parts.exp = (se); \
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(d) = se_u.value; \
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} while (0)
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/*
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* Common routine to process the arguments to nan(), nanf(), and nanl().
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*/
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void __scan_nan(uint32_t *__words, int __num_words, const char *__s);
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/*
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* Functions internal to the math package, yet not static.
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*/
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double __exp__D(double, double);
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struct Double __log__D(double);
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long double __p1evll(long double, void *, int);
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long double __polevll(long double, void *, int);
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#endif /* _MATH_PRIVATE_OPENBSD_H_ */
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