Last change
on this file since 351 was 337, checked in by coas-nagasima, 6 years ago |
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:
659 bytes
|
Line | |
---|
1 | #include "libm.h"
|
---|
2 |
|
---|
3 | #if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
|
---|
4 | long double roundl(long double x)
|
---|
5 | {
|
---|
6 | return round(x);
|
---|
7 | }
|
---|
8 | #elif (LDBL_MANT_DIG == 64 || LDBL_MANT_DIG == 113) && LDBL_MAX_EXP == 16384
|
---|
9 |
|
---|
10 | static const long double toint = 1/LDBL_EPSILON;
|
---|
11 |
|
---|
12 | long double roundl(long double x)
|
---|
13 | {
|
---|
14 | union ldshape u = {x};
|
---|
15 | int e = u.i.se & 0x7fff;
|
---|
16 | long double y;
|
---|
17 |
|
---|
18 | if (e >= 0x3fff+LDBL_MANT_DIG-1)
|
---|
19 | return x;
|
---|
20 | if (u.i.se >> 15)
|
---|
21 | x = -x;
|
---|
22 | if (e < 0x3fff-1) {
|
---|
23 | FORCE_EVAL(x + toint);
|
---|
24 | return 0*u.f;
|
---|
25 | }
|
---|
26 | y = x + toint - toint - x;
|
---|
27 | if (y > 0.5)
|
---|
28 | y = y + x - 1;
|
---|
29 | else if (y <= -0.5)
|
---|
30 | y = y + x + 1;
|
---|
31 | else
|
---|
32 | y = y + x;
|
---|
33 | if (u.i.se >> 15)
|
---|
34 | y = -y;
|
---|
35 | return y;
|
---|
36 | }
|
---|
37 | #endif
|
---|
Note:
See
TracBrowser
for help on using the repository browser.