mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-24 11:41:07 +00:00
26 lines
613 B
ArmAsm
26 lines
613 B
ArmAsm
/*
|
|
* 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) (1+x)) / x) */
|
|
ENTRY(__ieee754_acos)
|
|
fldl 4(%esp) /* x */
|
|
fld %st /* x : x */
|
|
fld1 /* 1 : x : x */
|
|
fsubp /* 1 - x : x */
|
|
fld1 /* 1 : 1 - x : x */
|
|
fadd %st(2) /* 1 + x : 1 - x : x */
|
|
fmulp /* 1 - x^2 : x */
|
|
fsqrt /* sqrt (1 - x^2) : x */
|
|
fabs
|
|
fxch %st(1) /* x : sqrt (1 - x^2) */
|
|
fpatan /* atan (sqrt(1 - x^2) / x) */
|
|
ret
|
|
END (__ieee754_acos)
|
|
strong_alias (__ieee754_acos, __acos_finite)
|