mirror of
https://github.com/c3lang/c3c.git
synced 2026-02-27 12:01:16 +00:00
35 lines
1.2 KiB
C
35 lines
1.2 KiB
C
module std::math::nolibc;
|
|
|
|
$if (!env::COMPILER_LIBC_AVAILABLE):
|
|
|
|
/* origin: FreeBSD /usr/src/lib/msun/src/k_sin.c */
|
|
/*
|
|
* ====================================================
|
|
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
|
|
*
|
|
* Developed at SunSoft, a Sun Microsystems, Inc. business.
|
|
* Permission to use, copy, modify, and distribute this
|
|
* software is freely granted, provided that this notice
|
|
* is preserved.
|
|
* ====================================================
|
|
*/
|
|
fn double __sin(double x, double y, int iy) @extern("__sin") @weak
|
|
{
|
|
|
|
const S1 = -1.66666666666666324348e-01; /* 0xBFC55555, 0x55555549 */
|
|
const S2 = 8.33333333332248946124e-03; /* 0x3F811111, 0x1110F8A6 */
|
|
const S3 = -1.98412698298579493134e-04; /* 0xBF2A01A0, 0x19C161D5 */
|
|
const S4 = 2.75573137070700676789e-06; /* 0x3EC71DE3, 0x57B1FE7D */
|
|
const S5 = -2.50507602534068634195e-08; /* 0xBE5AE5E6, 0x8A2B9CEB */
|
|
const S6 = 1.58969099521155010221e-10; /* 0x3DE5D93A, 0x5ACFD57C */
|
|
|
|
double z = x * x;
|
|
double w = z * z;
|
|
double r = S2 + z * (S3 + z * S4) + z * w * (S5 + z * S6);
|
|
double v = z * x;
|
|
return iy == 0
|
|
? x + v * (S1 + z * r)
|
|
: x - ((z * (0.5 * y - v * r) - y) - v * S1);
|
|
}
|
|
|
|
$endif; |