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/*
* Written by J.T. Conklin <jtc@netbsd.org>.
* Public domain.
*/
#include <machine/asm.h>
#include <i386-math-asm.h>
#include <libm-alias-finite.h>
RCSID("$NetBSD: e_asin.S,v 1.4 1995/05/08 23:45:40 jtc Exp $")
DEFINE_DBL_MIN
#ifdef PIC
# define MO(op) op##@GOTOFF(%ecx)
#else
# define MO(op) op
#endif
.text
/* asin = atan (x / sqrt((1-x) (1+x))) */
ENTRY(__ieee754_asin)
#ifdef PIC
LOAD_PIC_REG (cx)
#endif
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
DBL_CHECK_FORCE_UFLOW
ret
END (__ieee754_asin)
libm_alias_finite (__ieee754_asin, __asin)
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