projects / dragonfly.git / blame
| Commit | Line | Data |
|---|---|---|
| b34b60bc JS |
1 | /* |
| 2 | * Written by J.T. Conklin <jtc@NetBSD.org>. | |
| 3 | * Public domain. | |
| 4 | * | |
| 5 | * $NetBSD: e_acos.S,v 1.8 2003/07/26 19:24:57 salo Exp $ | |
| b34b60bc JS |
6 | */ |
| 7 | ||
| 8 | #include <machine/asm.h> | |
| 9 | ||
| 10 | #include "abi.h" | |
| 11 | ||
| 12 | /* acos = atan (sqrt(1 - x^2) / x) */ | |
| 13 | ENTRY(acos) | |
| 14 | XMM_ONE_ARG_DOUBLE_PROLOGUE | |
| 15 | fldl ARG_DOUBLE_ONE /* x */ | |
| 16 | fld %st(0) | |
| 17 | fmul %st(0) /* x^2 */ | |
| 18 | fld1 | |
| 19 | fsubp /* 1 - x^2 */ | |
| 20 | fsqrt /* sqrt (1 - x^2) */ | |
| 21 | fxch %st(1) | |
| 22 | fpatan | |
| 23 | XMM_DOUBLE_EPILOGUE | |
| 24 | ret | |
| d04e8698 | 25 | END(acos) |
| 70e34eb2 JM |
26 | |
| 27 | .section .note.GNU-stack,"",%progbits |