5980be9b3c
This work is based in part on code from NetBSD libm, libc and kernel. The library is partly public domain and partly BSD-style licensed.
24 lines
431 B
ArmAsm
24 lines
431 B
ArmAsm
/*
|
|
* Written by J.T. Conklin <jtc@NetBSD.org>.
|
|
* Public domain.
|
|
*/
|
|
|
|
#include <machine/asm.h>
|
|
|
|
#include "abi.h"
|
|
|
|
RCSID("$NetBSD: e_asin.S,v 1.7 2003/07/26 19:24:58 salo Exp $")
|
|
|
|
/* asin = atan (x / sqrt(1 - x^2)) */
|
|
ENTRY(__ieee754_asin)
|
|
XMM_ONE_ARG_DOUBLE_PROLOGUE
|
|
fldl ARG_DOUBLE_ONE /* x */
|
|
fld %st(0)
|
|
fmul %st(0) /* x^2 */
|
|
fld1
|
|
fsubp /* 1 - x^2 */
|
|
fsqrt /* sqrt (1 - x^2) */
|
|
fpatan
|
|
XMM_DOUBLE_EPILOGUE
|
|
ret
|