--- /dev/null
+/* origin: FreeBSD /usr/src/lib/msun/src/math_private.h */
+/*
+ * ====================================================
+ * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
+ *
+ * Developed at SunPro, a Sun Microsystems, Inc. business.
+ * Permission to use, copy, modify, and distribute this
+ * software is freely granted, provided that this notice
+ * is preserved.
+ * ====================================================
+ */
+
+#ifndef _LIBM_H
+#define _LIBM_H
+
+#include <stdint.h>
+#include <float.h>
+#include <math.h>
+#include <complex.h>
+
+#include "longdbl.h"
+
+union fshape {
+ float value;
+ uint32_t bits;
+};
+
+union dshape {
+ double value;
+ uint64_t bits;
+};
+
+/* Get two 32 bit ints from a double. */
+#define EXTRACT_WORDS(hi,lo,d) \
+do { \
+ union dshape __u; \
+ __u.value = (d); \
+ (hi) = __u.bits >> 32; \
+ (lo) = (uint32_t)__u.bits; \
+} while (0)
+
+/* Get a 64 bit int from a double. */
+#define EXTRACT_WORD64(i,d) \
+do { \
+ union dshape __u; \
+ __u.value = (d); \
+ (i) = __u.bits; \
+} while (0)
+
+/* Get the more significant 32 bit int from a double. */
+#define GET_HIGH_WORD(i,d) \
+do { \
+ union dshape __u; \
+ __u.value = (d); \
+ (i) = __u.bits >> 32; \
+} while (0)
+
+/* Get the less significant 32 bit int from a double. */
+#define GET_LOW_WORD(i,d) \
+do { \
+ union dshape __u; \
+ __u.value = (d); \
+ (i) = (uint32_t)__u.bits; \
+} while (0)
+
+/* Set a double from two 32 bit ints. */
+#define INSERT_WORDS(d,hi,lo) \
+do { \
+ union dshape __u; \
+ __u.bits = ((uint64_t)(hi) << 32) | (uint32_t)(lo); \
+ (d) = __u.value; \
+} while (0)
+
+/* Set a double from a 64 bit int. */
+#define INSERT_WORD64(d,i) \
+do { \
+ union dshape __u; \
+ __u.bits = (i); \
+ (d) = __u.value; \
+} while (0)
+
+/* Set the more significant 32 bits of a double from an int. */
+#define SET_HIGH_WORD(d,hi) \
+do { \
+ union dshape __u; \
+ __u.value = (d); \
+ __u.bits &= 0xffffffff; \
+ __u.bits |= (uint64_t)(hi) << 32; \
+ (d) = __u.value; \
+} while (0)
+
+/* Set the less significant 32 bits of a double from an int. */
+#define SET_LOW_WORD(d,lo) \
+do { \
+ union dshape __u; \
+ __u.value = (d); \
+ __u.bits &= 0xffffffff00000000ull; \
+ __u.bits |= (uint32_t)(lo); \
+ (d) = __u.value; \
+} while (0)
+
+/* Get a 32 bit int from a float. */
+#define GET_FLOAT_WORD(i,d) \
+do { \
+ union fshape __u; \
+ __u.value = (d); \
+ (i) = __u.bits; \
+} while (0)
+
+/* Set a float from a 32 bit int. */
+#define SET_FLOAT_WORD(d,i) \
+do { \
+ union fshape __u; \
+ __u.bits = (i); \
+ (d) = __u.value; \
+} while (0)
+
+/* fdlibm kernel functions */
+
+int __rem_pio2_large(double*,double*,int,int,int);
+
+int __rem_pio2(double,double*);
+double __sin(double,double,int);
+double __cos(double,double);
+double __tan(double,double,int);
+double __expo2(double);
+double complex __ldexp_cexp(double complex,int);
+
+int __rem_pio2f(float,double*);
+float __sindf(double);
+float __cosdf(double);
+float __tandf(double,int);
+float __expo2f(float);
+float complex __ldexp_cexpf(float complex,int);
+
+long double __sinl(long double, long double, int);
+long double __cosl(long double, long double);
+long double __tanl(long double, long double, int);
+
+/* polynomial evaluation */
+long double __polevll(long double, long double *, int);
+long double __p1evll(long double, long double *, int);
+
+// FIXME: not needed when -fexcess-precision=standard is supported (>=gcc4.5)
+/*
+ * Attempt to get strict C99 semantics for assignment with non-C99 compilers.
+ */
+#if 1
+#define STRICT_ASSIGN(type, lval, rval) do { \
+ volatile type __v = (rval); \
+ (lval) = __v; \
+} while (0)
+#else
+#define STRICT_ASSIGN(type, lval, rval) ((lval) = (type)(rval))
+#endif
+
+
+/* complex */
+
+union dcomplex {
+ double complex z;
+ double a[2];
+};
+union fcomplex {
+ float complex z;
+ float a[2];
+};
+union lcomplex {
+ long double complex z;
+ long double a[2];
+};
+
+// FIXME: move to complex.h ?
+#define creal(z) ((double)(z))
+#define crealf(z) ((float)(z))
+#define creall(z) ((long double)(z))
+#define cimag(z) ((union dcomplex){(z)}.a[1])
+#define cimagf(z) ((union fcomplex){(z)}.a[1])
+#define cimagl(z) ((union lcomplex){(z)}.a[1])
+
+/* x + y*I is not supported properly by gcc */
+#define cpack(x,y) ((union dcomplex){.a={(x),(y)}}.z)
+#define cpackf(x,y) ((union fcomplex){.a={(x),(y)}}.z)
+#define cpackl(x,y) ((union lcomplex){.a={(x),(y)}}.z)
+
+#endif
projects / musl / blobdiff