mirror of
https://github.com/fluencelabs/musl
synced 2025-06-06 03:21:36 +00:00
20 lines
502 B
C
20 lines
502 B
C
|
#define _GNU_SOURCE
|
||
|
|
#include <math.h>
|
||
|
|
|
||
|
|
long double exp10l(long double x)
|
||
|
|
{
|
||
|
|
static const long double p10[] = {
|
||
|
|
1e-15, 1e-14, 1e-13, 1e-12, 1e-11, 1e-10,
|
||
|
|
1e-9, 1e-8, 1e-7, 1e-6, 1e-5, 1e-4, 1e-3, 1e-2, 1e-1,
|
||
|
|
1, 1e1, 1e2, 1e3, 1e4, 1e5, 1e6, 1e7, 1e8, 1e9,
|
||
|
|
1e10, 1e11, 1e12, 1e13, 1e14, 1e15
|
||
|
|
};
|
||
|
|
long double n, y = modfl(x, &n);
|
||
|
|
if (fabsl(n) < 16) {
|
||
|
|
if (!y) return p10[(int)n+15];
|
||
|
|
y = exp2l(3.32192809488736234787031942948939L * y);
|
||
|
|
return y * p10[(int)n+15];
|
||
|
|
}
|
||
|
|
return powl(10.0, x);
|
||
|
|
}
|