blob: 5a6ca259ddb816414ddd18f1fdb6dc26c9c343ae (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
|
# define TGSOURCE "asin.c"
#include <errno.h>
#include <math.h>
#include "_tgmath.h"
/** arc sine **/
TYPE TGFN(asin)(TYPE x)
{
if (TGFN(fabs)(x) > 1.0) {
errno = EDOM; /* ARGUMENT(x) is not in the range [-1, +1] */
return TGHUGE;
}
if (fpclassify(x) == FP_ZERO) {
return x;
}
if (0) {
errno = ERANGE; /* The result cannot be represented */
/* RETURN_FAILURE(CONSTANT(HUGE_VAL), A range error occurred); */
return TGHUGE;
}
/* RETURN_SUCCESS(a value in range `[-PI()/2, +PI()/2]'); */
return (TYPE)0.0;
}
/***
compute the principal value of the arc sine of ARGUMENT(x), which must be in
the range [-1, +1].
***/
/*
IMPLEMENTATION(The value returned on a domain error, CONSTANT(HUGE_VAL))
LINK(m)
STDC(1)
*/
|
