diff options
Diffstat (limited to 'system/lib/libc/musl/src/internal/libm.h')
| -rw-r--r-- | system/lib/libc/musl/src/internal/libm.h | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/system/lib/libc/musl/src/internal/libm.h b/system/lib/libc/musl/src/internal/libm.h new file mode 100644 index 00000000..9f0d3bc8 --- /dev/null +++ b/system/lib/libc/musl/src/internal/libm.h @@ -0,0 +1,169 @@ +/* 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 <endian.h> + +#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024 +#elif LDBL_MANT_DIG == 64 && LDBL_MAX_EXP == 16384 && __BYTE_ORDER == __LITTLE_ENDIAN +union ldshape { + long double f; + struct { + uint64_t m; + uint16_t se; + } i; +}; +#elif LDBL_MANT_DIG == 113 && LDBL_MAX_EXP == 16384 && __BYTE_ORDER == __LITTLE_ENDIAN +union ldshape { + long double f; + struct { + uint64_t lo; + uint32_t mid; + uint16_t top; + uint16_t se; + } i; + struct { + uint64_t lo; + uint64_t hi; + } i2; +}; +#else +#error Unsupported long double representation +#endif + +#define FORCE_EVAL(x) do { \ + if (sizeof(x) == sizeof(float)) { \ + volatile float __x; \ + __x = (x); \ + } else if (sizeof(x) == sizeof(double)) { \ + volatile double __x; \ + __x = (x); \ + } else { \ + volatile long double __x; \ + __x = (x); \ + } \ +} while(0) + +/* Get two 32 bit ints from a double. */ +#define EXTRACT_WORDS(hi,lo,d) \ +do { \ + union {double f; uint64_t i;} __u; \ + __u.f = (d); \ + (hi) = __u.i >> 32; \ + (lo) = (uint32_t)__u.i; \ +} while (0) + +/* Get the more significant 32 bit int from a double. */ +#define GET_HIGH_WORD(hi,d) \ +do { \ + union {double f; uint64_t i;} __u; \ + __u.f = (d); \ + (hi) = __u.i >> 32; \ +} while (0) + +/* Get the less significant 32 bit int from a double. */ +#define GET_LOW_WORD(lo,d) \ +do { \ + union {double f; uint64_t i;} __u; \ + __u.f = (d); \ + (lo) = (uint32_t)__u.i; \ +} while (0) + +/* Set a double from two 32 bit ints. */ +#define INSERT_WORDS(d,hi,lo) \ +do { \ + union {double f; uint64_t i;} __u; \ + __u.i = ((uint64_t)(hi)<<32) | (uint32_t)(lo); \ + (d) = __u.f; \ +} while (0) + +/* Set the more significant 32 bits of a double from an int. */ +#define SET_HIGH_WORD(d,hi) \ +do { \ + union {double f; uint64_t i;} __u; \ + __u.f = (d); \ + __u.i &= 0xffffffff; \ + __u.i |= (uint64_t)(hi) << 32; \ + (d) = __u.f; \ +} while (0) + +/* Set the less significant 32 bits of a double from an int. */ +#define SET_LOW_WORD(d,lo) \ +do { \ + union {double f; uint64_t i;} __u; \ + __u.f = (d); \ + __u.i &= 0xffffffff00000000ull; \ + __u.i |= (uint32_t)(lo); \ + (d) = __u.f; \ +} while (0) + +/* Get a 32 bit int from a float. */ +#define GET_FLOAT_WORD(w,d) \ +do { \ + union {float f; uint32_t i;} __u; \ + __u.f = (d); \ + (w) = __u.i; \ +} while (0) + +/* Set a float from a 32 bit int. */ +#define SET_FLOAT_WORD(d,w) \ +do { \ + union {float f; uint32_t i;} __u; \ + __u.i = (w); \ + (d) = __u.f; \ +} 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); + +int __rem_pio2l(long double, long double *); +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, const long double *, int); +long double __p1evll(long double, const long double *, int); + +#if 0 +/* Attempt to get strict C99 semantics for assignment with non-C99 compilers. */ +#define STRICT_ASSIGN(type, lval, rval) do { \ + volatile type __v = (rval); \ + (lval) = __v; \ +} while (0) +#else +/* Should work with -fexcess-precision=standard (>=gcc-4.5) or -ffloat-store */ +#define STRICT_ASSIGN(type, lval, rval) ((lval) = (type)(rval)) +#endif + +#endif |