| /** |
| * This file has no copyright assigned and is placed in the Public Domain. |
| * This file is part of the mingw-w64 runtime package. |
| * No warranty is given; refer to the file DISCLAIMER.PD within this package. |
| */ |
| long double acosl (long double x); |
| |
| long double acosl (long double x) |
| { |
| long double res = 0.0L; |
| |
| /* acosl = atanl (sqrtl(1 - x^2) / x) */ |
| asm volatile ( |
| "fld %%st\n\t" |
| "fmul %%st(0)\n\t" /* x^2 */ |
| "fld1\n\t" |
| "fsubp\n\t" /* 1 - x^2 */ |
| "fsqrt\n\t" /* sqrtl (1 - x^2) */ |
| "fxch %%st(1)\n\t" |
| "fpatan" |
| : "=t" (res) : "0" (x) : "st(1)"); |
| return res; |
| } |
