24 lines
511 B
ArmAsm
24 lines
511 B
ArmAsm
/*
|
|
* Written by J.T. Conklin <jtc@netbsd.org>.
|
|
* Public domain.
|
|
*/
|
|
|
|
#include <machine/asm.h>
|
|
|
|
RCSID("$NetBSD: e_asin.S,v 1.4 1995/05/08 23:45:40 jtc Exp $")
|
|
|
|
/* asin = atan (x / sqrt((1-x) (1+x))) */
|
|
ENTRY(__ieee754_asin)
|
|
fldl 4(%esp) /* x */
|
|
fld %st
|
|
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 */
|
|
fsqrt /* sqrt (1 - x^2) */
|
|
fpatan
|
|
ret
|
|
END (__ieee754_asin)
|
|
strong_alias (__ieee754_asin, __asin_finite)
|