Last change
on this file since 377 was 352, checked in by coas-nagasima, 6 years ago |
arm向けASP3版ECNLを追加
|
-
Property svn:eol-style
set to
native
-
Property svn:mime-type
set to
text/x-csrc;charset=UTF-8
|
File size:
973 bytes
|
Rev | Line | |
---|
[352] | 1 | #include "libm.h"
|
---|
| 2 |
|
---|
| 3 | #if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
|
---|
| 4 | long double asinhl(long double x)
|
---|
| 5 | {
|
---|
| 6 | return asinh(x);
|
---|
| 7 | }
|
---|
| 8 | #elif LDBL_MANT_DIG == 64 && LDBL_MAX_EXP == 16384
|
---|
| 9 | /* asinh(x) = sign(x)*log(|x|+sqrt(x*x+1)) ~= x - x^3/6 + o(x^5) */
|
---|
| 10 | long double asinhl(long double x)
|
---|
| 11 | {
|
---|
| 12 | union ldshape u = {x};
|
---|
| 13 | unsigned e = u.i.se & 0x7fff;
|
---|
| 14 | unsigned s = u.i.se >> 15;
|
---|
| 15 |
|
---|
| 16 | /* |x| */
|
---|
| 17 | u.i.se = e;
|
---|
| 18 | x = u.f;
|
---|
| 19 |
|
---|
| 20 | if (e >= 0x3fff + 32) {
|
---|
| 21 | /* |x| >= 0x1p32 or inf or nan */
|
---|
| 22 | x = logl(x) + 0.693147180559945309417232121458176568L;
|
---|
| 23 | } else if (e >= 0x3fff + 1) {
|
---|
| 24 | /* |x| >= 2 */
|
---|
| 25 | x = logl(2*x + 1/(sqrtl(x*x+1)+x));
|
---|
| 26 | } else if (e >= 0x3fff - 32) {
|
---|
| 27 | /* |x| >= 0x1p-32 */
|
---|
| 28 | x = log1pl(x + x*x/(sqrtl(x*x+1)+1));
|
---|
| 29 | } else {
|
---|
| 30 | /* |x| < 0x1p-32, raise inexact if x!=0 */
|
---|
| 31 | FORCE_EVAL(x + 0x1p120f);
|
---|
| 32 | }
|
---|
| 33 | return s ? -x : x;
|
---|
| 34 | }
|
---|
| 35 | #elif LDBL_MANT_DIG == 113 && LDBL_MAX_EXP == 16384
|
---|
| 36 | // TODO: broken implementation to make things compile
|
---|
| 37 | long double asinhl(long double x)
|
---|
| 38 | {
|
---|
| 39 | return asinh(x);
|
---|
| 40 | }
|
---|
| 41 | #endif
|
---|
Note:
See
TracBrowser
for help on using the repository browser.