diff options
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/libm-i387/s_isnanl.c | 9 | ||||
| -rw-r--r-- | sysdeps/libm-ieee754/s_frexpl.c | 69 | ||||
| -rw-r--r-- | sysdeps/libm-ieee754/s_ldexpl.c | 37 |
3 files changed, 111 insertions, 4 deletions
diff --git a/sysdeps/libm-i387/s_isnanl.c b/sysdeps/libm-i387/s_isnanl.c index 768ea2164b..6a74b956cc 100644 --- a/sysdeps/libm-i387/s_isnanl.c +++ b/sysdeps/libm-i387/s_isnanl.c @@ -36,10 +36,11 @@ static char rcsid[] = "$NetBSD: $"; int32_t se,hx,lx; GET_LDOUBLE_WORDS(se,hx,lx,x); se = (se & 0x7fff) << 1; - lx |= hx; - /* The additional &hx is required because Intel's extended format - has the normally implicit 1 explicit present. Sigh! */ - se |= (u_int32_t)((lx|(-lx))&hx)>>31; + /* The additional & 0x7fffffff is required because Intel's + extended format has the normally implicit 1 explicit + present. Sigh! */ + lx |= hx & 0x7fffffff; + se |= (u_int32_t)(lx|(-lx))>>31; se = 0xfffe - se; return (int)((u_int32_t)(se))>>16; } diff --git a/sysdeps/libm-ieee754/s_frexpl.c b/sysdeps/libm-ieee754/s_frexpl.c new file mode 100644 index 0000000000..7a49bc37c8 --- /dev/null +++ b/sysdeps/libm-ieee754/s_frexpl.c @@ -0,0 +1,69 @@ +/* s_frexpl.c -- long double version of s_frexp.c. + * Conversion to long double by Ulrich Drepper, + * Cygnus Support, drepper@cygnus.com. + */ + +/* + * ==================================================== + * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. + * + * Developed at SunPro, a Sun Microsystems, Inc. business. + * Permission to use, copy, modify, and distribute this + * software is freely granted, provided that this notice + * is preserved. + * ==================================================== + */ + +#if defined(LIBM_SCCS) && !defined(lint) +static char rcsid[] = "$NetBSD: $"; +#endif + +/* + * for non-zero x + * x = frexpl(arg,&exp); + * return a long double fp quantity x such that 0.5 <= |x| <1.0 + * and the corresponding binary exponent "exp". That is + * arg = x*2^exp. + * If arg is inf, 0.0, or NaN, then frexpl(arg,&exp) returns arg + * with *exp=0. + */ + +#include "math.h" +#include "math_private.h" + +#ifdef __STDC__ +static const long double +#else +static long double +#endif +#if LDBL_MANT_DIG == 64 +two65 = 3.68934881474191032320e+19L; /* 0x4040, 0x80000000, 0x00000000 */ +#else +# error "Cannot handle this MANT_DIG" +#endif + + +#ifdef __STDC__ + long double __frexpl(long double x, int *eptr) +#else + long double __frexpl(x, eptr) + long double x; int *eptr; +#endif +{ + u_int32_t se, hx, ix, lx; + GET_LDOUBLE_WORDS(se,hx,lx,x); + ix = 0x7fff&se; + *eptr = 0; + if(ix==0x7fff||((ix|hx|lx)==0)) return x; /* 0,inf,nan */ + if (ix==0x0000) { /* subnormal */ + x *= two65; + GET_LDOUBLE_EXP(se,x); + ix = se&0x7fff; + *eptr = -65; + } + *eptr += ix-16382; + se = (se & 0x8000) | 0x3ffe; + SET_LDOUBLE_EXP(x,se); + return x; +} +weak_alias (__frexpl, frexpl) diff --git a/sysdeps/libm-ieee754/s_ldexpl.c b/sysdeps/libm-ieee754/s_ldexpl.c new file mode 100644 index 0000000000..bf64c89898 --- /dev/null +++ b/sysdeps/libm-ieee754/s_ldexpl.c @@ -0,0 +1,37 @@ +/* s_ldexpl.c -- long double version of s_ldexp.c. + * Conversion to long double by Ulrich Drepper, + * Cygnus Support, drepper@cygnus.com. + */ + +/* + * ==================================================== + * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. + * + * Developed at SunPro, a Sun Microsystems, Inc. business. + * Permission to use, copy, modify, and distribute this + * software is freely granted, provided that this notice + * is preserved. + * ==================================================== + */ + +#if defined(LIBM_SCCS) && !defined(lint) +static char rcsid[] = "$NetBSD: $"; +#endif + +#include "math.h" +#include "math_private.h" +#include <errno.h> + +#ifdef __STDC__ + long double __ldexpl(long double value, int exp) +#else + long double __ldexpl(value, exp) + long double value; int exp; +#endif +{ + if(!__finitel(value)||value==0.0) return value; + value = __scalbnl(value,exp); + if(!__finitel(value)||value==0.0) errno = ERANGE; + return value; +} +weak_alias (__ldexpl, ldexpl) |