diff options
Diffstat (limited to 'libquadmath/math/logq.c')
| -rw-r--r-- | libquadmath/math/logq.c | 26 |
1 files changed, 13 insertions, 13 deletions
diff --git a/libquadmath/math/logq.c b/libquadmath/math/logq.c index 43249bb498a..6fdfc2d48e1 100644 --- a/libquadmath/math/logq.c +++ b/libquadmath/math/logq.c @@ -1,12 +1,12 @@ -/* logq.c +/* logll.c * - * Natural logarithm for __float128 precision. + * Natural logarithm for 128-bit long double precision. * * * * SYNOPSIS: * - * __float128 x, y, logq(); + * long double x, y, logq(); * * y = logq( x ); * @@ -42,7 +42,7 @@ * */ -/* Copyright 2001 by Stephen L. Moshier <moshier@na-net.ornl.gov> +/* Copyright 2001 by Stephen L. Moshier <moshier@na-net.ornl.gov> This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public @@ -55,8 +55,8 @@ Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public - License along with this library; if not, write to the Free Software - Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ + License along with this library; if not, see + <http://www.gnu.org/licenses/>. */ #include "quadmath-imp.h" @@ -183,7 +183,7 @@ static const __float128 ln2b = 1.4286068203094172321214581765680755001344E-6Q; __float128 -logq (__float128 x) +logq(__float128 x) { __float128 z, y, w; ieee854_float128 u, t; @@ -240,11 +240,11 @@ logq (__float128 x) /* On this interval the table is not used due to cancellation error. */ if ((x <= 1.0078125Q) && (x >= 0.9921875Q)) { - if (x == 1.0Q) - return 0.0Q; - z = x - 1.0Q; + if (x == 1) + return 0; + z = x - 1; k = 64; - t.value = 1.0Q; + t.value = 1; e = 0; } else @@ -252,7 +252,7 @@ logq (__float128 x) /* log(u) = log( t u/t ) = log(t) + log(u/t) log(t) is tabulated in the lookup table. Express log(u/t) = log(1+z), where z = u/t - 1 = (u-t)/t. - cf. Cody & Waite. */ + cf. Cody & Waite. */ z = (u.value - t.value) / t.value; } /* Series expansion of log(1+z). */ @@ -274,7 +274,7 @@ logq (__float128 x) y += e * ln2b; /* Base 2 exponent offset times ln(2). */ y += z; y += logtbl[k-26]; /* log(t) - (t-1) */ - y += (t.value - 1.0Q); + y += (t.value - 1); y += e * ln2a; return y; } |