diff options
Diffstat (limited to 'libquadmath/math/coshq.c')
| -rw-r--r-- | libquadmath/math/coshq.c | 22 |
1 files changed, 11 insertions, 11 deletions
diff --git a/libquadmath/math/coshq.c b/libquadmath/math/coshq.c index a6e0eb5f193..77f4b98338b 100644 --- a/libquadmath/math/coshq.c +++ b/libquadmath/math/coshq.c @@ -30,25 +30,25 @@ License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ -/* __ieee754_coshl(x) +/* coshq(x) * Method : - * mathematically coshl(x) if defined to be (exp(x)+exp(-x))/2 - * 1. Replace x by |x| (coshl(x) = coshl(-x)). + * mathematically coshq(x) if defined to be (exp(x)+exp(-x))/2 + * 1. Replace x by |x| (coshq(x) = coshq(-x)). * 2. * [ exp(x) - 1 ]^2 - * 0 <= x <= ln2/2 : coshl(x) := 1 + ------------------- + * 0 <= x <= ln2/2 : coshq(x) := 1 + ------------------- * 2*exp(x) * * exp(x) + 1/exp(x) - * ln2/2 <= x <= 22 : coshl(x) := ------------------- + * ln2/2 <= x <= 22 : coshq(x) := ------------------- * 2 - * 22 <= x <= lnovft : coshl(x) := expl(x)/2 - * lnovft <= x <= ln2ovft: coshl(x) := expl(x/2)/2 * expl(x/2) - * ln2ovft < x : coshl(x) := huge*huge (overflow) + * 22 <= x <= lnovft : coshq(x) := expq(x)/2 + * lnovft <= x <= ln2ovft: coshq(x) := expq(x/2)/2 * expq(x/2) + * ln2ovft < x : coshq(x) := huge*huge (overflow) * * Special cases: - * coshl(x) is |x| if x is +INF, -INF, or NaN. - * only coshl(0)=1 is exact for finite x. + * coshq(x) is |x| if x is +INF, -INF, or NaN. + * only coshq(0)=1 is exact for finite x. */ #include "quadmath-imp.h" @@ -73,7 +73,7 @@ coshq (__float128 x) if (ex >= 0x7fff0000) return x * x; - /* |x| in [0,0.5*ln2], return 1+expm1l(|x|)^2/(2*expl(|x|)) */ + /* |x| in [0,0.5*ln2], return 1+expm1l(|x|)^2/(2*expq(|x|)) */ if (ex < 0x3ffd62e4) /* 0.3465728759765625 */ { t = expm1q (u.value); |