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author | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
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committer | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
commit | 5046dbb4a7eba5eccfd258f92f4735c9ffc8d069 (patch) | |
tree | 4470480d904b65cf14ca524f96f79eca818c3eaf /sysdeps/ieee754/ldbl-128ibm/e_acoshl.c | |
parent | 199fc19d3aaaf57944ef036e15904febe877fc93 (diff) | |
download | glibc-zack/build-layout-experiment.tar glibc-zack/build-layout-experiment.tar.gz glibc-zack/build-layout-experiment.tar.bz2 glibc-zack/build-layout-experiment.zip |
Prepare for radical source tree reorganization.zack/build-layout-experiment
All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).
Diffstat (limited to 'sysdeps/ieee754/ldbl-128ibm/e_acoshl.c')
-rw-r--r-- | sysdeps/ieee754/ldbl-128ibm/e_acoshl.c | 62 |
1 files changed, 0 insertions, 62 deletions
diff --git a/sysdeps/ieee754/ldbl-128ibm/e_acoshl.c b/sysdeps/ieee754/ldbl-128ibm/e_acoshl.c deleted file mode 100644 index cab1da9995..0000000000 --- a/sysdeps/ieee754/ldbl-128ibm/e_acoshl.c +++ /dev/null @@ -1,62 +0,0 @@ -/* @(#)e_acosh.c 5.1 93/09/24 */ -/* - * ==================================================== - * 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. - * ==================================================== - */ - -/* __ieee754_acosh(x) - * Method : - * Based on - * acosh(x) = log [ x + sqrt(x*x-1) ] - * we have - * acosh(x) := log(x)+ln2, if x is large; else - * acosh(x) := log(2x-1/(sqrt(x*x-1)+x)) if x>2; else - * acosh(x) := log1p(t+sqrt(2.0*t+t*t)); where t=x-1. - * - * Special cases: - * acosh(x) is NaN with signal if x<1. - * acosh(NaN) is NaN without signal. - */ - -#include <math.h> -#include <math_private.h> - -static const long double -one = 1.0L, -ln2 = M_LN2l; - -long double -__ieee754_acoshl(long double x) -{ - long double t; - int64_t hx; - uint64_t lx; - double xhi, xlo; - - ldbl_unpack (x, &xhi, &xlo); - EXTRACT_WORDS64 (hx, xhi); - EXTRACT_WORDS64 (lx, xlo); - if(hx<0x3ff0000000000000LL) { /* x < 1 */ - return (x-x)/(x-x); - } else if(hx >=0x4370000000000000LL) { /* x >= 2**56 */ - if(hx >=0x7ff0000000000000LL) { /* x is inf of NaN */ - return x+x; - } else - return __ieee754_logl(x)+ln2; /* acosh(huge)=log(2x) */ - } else if (((hx-0x3ff0000000000000LL)|(lx&0x7fffffffffffffffLL))==0) { - return 0.0; /* acosh(1) = 0 */ - } else if (hx > 0x4000000000000000LL) { /* 2**56 > x > 2 */ - t=x*x; - return __ieee754_logl(2.0*x-one/(x+__ieee754_sqrtl(t-one))); - } else { /* 1<x<2 */ - t = x-one; - return __log1pl(t+__ieee754_sqrtl(2.0*t+t*t)); - } -} -strong_alias (__ieee754_acoshl, __acoshl_finite) |