projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| b3b38042 AJ |
1 | /* |
| 2 | * Written by J.T. Conklin <jtc@netbsd.org>. | |
| 3 | * Public domain. | |
| 4 | * | |
| 5 | * Adapted for `long double' by Ulrich Drepper <drepper@cygnus.com>. | |
| 6 | */ | |
| 7 | ||
| 8 | #include <math_private.h> | |
| 9 | ||
| 10 | long double | |
| 11 | __ieee754_acosl (long double x) | |
| 12 | { | |
| 13 | long double res; | |
| 14 | ||
| 15 | /* acosl = atanl (sqrtl(1 - x^2) / x) */ | |
| 16 | asm ( "fld %%st\n" | |
| 17 | "fmul %%st(0)\n" /* x^2 */ | |
| 18 | "fld1\n" | |
| 19 | "fsubp\n" /* 1 - x^2 */ | |
| 20 | "fsqrt\n" /* sqrtl (1 - x^2) */ | |
| 21 | "fxch %%st(1)\n" | |
| 22 | "fpatan" | |
| 23 | : "=t" (res) : "0" (x) : "st(1)"); | |
| 24 | return res; | |
| 25 | } | |
| 0ac5ae23 | 26 | strong_alias (__ieee754_acosl, __acosl_finite) |