| /* | |
| * Written by J.T. Conklin <jtc@netbsd.org>. | |
| * Public domain. | |
| */ | |
| #include <machine/asm.h> | |
| RCSID("$NetBSD: e_acos.S,v 1.4 1995/05/08 23:44:37 jtc Exp $") | |
| /* acos = atan (sqrt(1 - x^2) / x) */ | |
| ENTRY(__ieee754_acos) | |
| fldl 4(%esp) /* x */ | |
| fld %st /* x : x */ | |
| fmul %st(0) /* x^2 : x */ | |
| fld1 /* 1 : x^2 : x */ | |
| fsubp /* 1 - x^2 : x */ | |
| fsqrt /* sqrt (1 - x^2) : x */ | |
| fxch %st(1) /* x : sqrt (1 - x^2) */ | |
| fpatan /* atan (sqrt(1 - x^2) / x) */ | |
| ret | |
| END (__ieee754_acos) |