mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-14 09:01:07 +00:00
b3b380428d
2001-05-06 Andreas Jaeger <aj@suse.de> * sysdeps/i386/fpu/e_acosl.c: New, rewrite of e_acos.S. * sysdeps/i386/fpu/s_atanl.c: New, rewrite of e_atanl.S. * sysdeps/i386/fpu/e_sqrtl.c: New, rewrite of e_sqrt.S. * sysdeps/i386/fpu/e_acosl.S: Removed. * sysdeps/i386/fpu/s_atanl.S: Removed. * sysdeps/i386/fpu/e_sqrtl.S: Removed.
26 lines
481 B
C
26 lines
481 B
C
/*
|
|
* Written by J.T. Conklin <jtc@netbsd.org>.
|
|
* Public domain.
|
|
*
|
|
* Adapted for `long double' by Ulrich Drepper <drepper@cygnus.com>.
|
|
*/
|
|
|
|
#include <math_private.h>
|
|
|
|
long double
|
|
__ieee754_acosl (long double x)
|
|
{
|
|
long double res;
|
|
|
|
/* acosl = atanl (sqrtl(1 - x^2) / x) */
|
|
asm ( "fld %%st\n"
|
|
"fmul %%st(0)\n" /* x^2 */
|
|
"fld1\n"
|
|
"fsubp\n" /* 1 - x^2 */
|
|
"fsqrt\n" /* sqrtl (1 - x^2) */
|
|
"fxch %%st(1)\n"
|
|
"fpatan"
|
|
: "=t" (res) : "0" (x) : "st(1)");
|
|
return res;
|
|
}
|