first commit of the new libm!

[musl] / src / math / e_asinf.c

diff --git a/src/math/e_asinf.c b/src/math/e_asinf.c
deleted file mode 100644 (file)
index 9c69397..0000000
--- a/src/math/e_asinf.c
+++ /dev/null
@@ -1,80 +0,0 @@
-/* e_asinf.c -- float version of e_asin.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
- */
-
-/*
- * ====================================================
- * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
- *
- * Developed at SunPro, a Sun Microsystems, Inc. business.
- * Permission to use, copy, modify, and distribute this
- * software is freely granted, provided that this notice
- * is preserved.
- * ====================================================
- */
-
-#include <math.h>
-#include "math_private.h"
-
-static const float
-one =  1.0000000000e+00, /* 0x3F800000 */
-huge =  1.000e+30,
-pio2_hi =  1.5707962513e+00, /* 0x3fc90fda */
-pio2_lo =  7.5497894159e-08, /* 0x33a22168 */
-pio4_hi =  7.8539818525e-01, /* 0x3f490fdb */
-       /* coefficient for R(x^2) */
-pS0 =  1.6666667163e-01, /* 0x3e2aaaab */
-pS1 = -3.2556581497e-01, /* 0xbea6b090 */
-pS2 =  2.0121252537e-01, /* 0x3e4e0aa8 */
-pS3 = -4.0055535734e-02, /* 0xbd241146 */
-pS4 =  7.9153501429e-04, /* 0x3a4f7f04 */
-pS5 =  3.4793309169e-05, /* 0x3811ef08 */
-qS1 = -2.4033949375e+00, /* 0xc019d139 */
-qS2 =  2.0209457874e+00, /* 0x4001572d */
-qS3 = -6.8828397989e-01, /* 0xbf303361 */
-qS4 =  7.7038154006e-02; /* 0x3d9dc62e */
-
-float
-asinf(float x)
-{
-       float t=0.0,w,p,q,c,r,s;
-       int32_t hx,ix;
-       GET_FLOAT_WORD(hx,x);
-       ix = hx&0x7fffffff;
-       if(ix==0x3f800000) {
-               /* asin(1)=+-pi/2 with inexact */
-           return x*pio2_hi+x*pio2_lo;
-       } else if(ix> 0x3f800000) {     /* |x|>= 1 */
-           return (x-x)/(x-x);         /* asin(|x|>1) is NaN */
-       } else if (ix<0x3f000000) {     /* |x|<0.5 */
-           if(ix<0x32000000) {         /* if |x| < 2**-27 */
-               if(huge+x>one) return x;/* return x with inexact if x!=0*/
-           } else
-               t = x*x;
-               p = t*(pS0+t*(pS1+t*(pS2+t*(pS3+t*(pS4+t*pS5)))));
-               q = one+t*(qS1+t*(qS2+t*(qS3+t*qS4)));
-               w = p/q;
-               return x+x*w;
-       }
-       /* 1> |x|>= 0.5 */
-       w = one-fabsf(x);
-       t = w*(float)0.5;
-       p = t*(pS0+t*(pS1+t*(pS2+t*(pS3+t*(pS4+t*pS5)))));
-       q = one+t*(qS1+t*(qS2+t*(qS3+t*qS4)));
-       s = sqrtf(t);
-       if(ix>=0x3F79999A) {    /* if |x| > 0.975 */
-           w = p/q;
-           t = pio2_hi-((float)2.0*(s+s*w)-pio2_lo);
-       } else {
-           int32_t iw;
-           w  = s;
-           GET_FLOAT_WORD(iw,w);
-           SET_FLOAT_WORD(w,iw&0xfffff000);
-           c  = (t-w*w)/(s+w);
-           r  = p/q;
-           p  = (float)2.0*s*r-(pio2_lo-(float)2.0*c);
-           q  = pio4_hi-(float)2.0*w;
-           t  = pio4_hi-(p-q);
-       }
-       if(hx>0) return t; else return -t;
-}