1/*
2 * Written by J.T. Conklin <jtc@netbsd.org>.
3 * Public domain.
4 * Adapted for float type by Ulrich Drepper <drepper@cygnus.com>.
5 */
6
7#include <machine/asm.h>
8
9RCSID("$NetBSD: $")
10
11/* acos = atan (sqrt(1 - x^2) / x) */
12ENTRY(__ieee754_acosf)
13	flds	4(%esp)			/* x */
14	fld	%st
15	fmul	%st(0)			/* x^2 */
16	fld1
17	fsubp				/* 1 - x^2 */
18	fsqrt				/* sqrt (1 - x^2) */
19	fxch	%st(1)
20	fpatan
21	ret
22END (__ieee754_acosf)
23