| /* |
| * Written by J.T. Conklin <jtc@netbsd.org>. |
| * Public domain. |
| */ |
| |
| #include <machine/asm.h> |
| #include <i386-math-asm.h> |
| |
| RCSID("$NetBSD: e_asin.S,v 1.4 1995/05/08 23:45:40 jtc Exp $") |
| |
| DEFINE_DBL_MIN |
| |
| #ifdef PIC |
| # define MO(op) op##@GOTOFF(%ecx) |
| #else |
| # define MO(op) op |
| #endif |
| |
| .text |
| |
| /* asin = atan (x / sqrt((1-x) (1+x))) */ |
| ENTRY(__ieee754_asin) |
| #ifdef PIC |
| LOAD_PIC_REG (cx) |
| #endif |
| fldl 4(%esp) /* x */ |
| fld %st |
| fld1 /* 1 : x : x */ |
| fsubp /* 1 - x : x */ |
| fld1 /* 1 : 1 - x : x */ |
| fadd %st(2) /* 1 + x : 1 - x : x */ |
| fmulp /* 1 - x^2 */ |
| fsqrt /* sqrt (1 - x^2) */ |
| fpatan |
| DBL_CHECK_FORCE_UFLOW |
| ret |
| END (__ieee754_asin) |
| strong_alias (__ieee754_asin, __asin_finite) |
