Merge branch 'master' of ssh://git.gag.com/scm/git/fw/altos

[fw/altos] / src / math / ef_acos.c

diff --git a/src/math/ef_acos.c b/src/math/ef_acos.c
deleted file mode 100644 (file)
index f73f97d..0000000
--- a/src/math/ef_acos.c
+++ /dev/null
@@ -1,84 +0,0 @@
-/* ef_acos.c -- float version of e_acos.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 "fdlibm.h"
-
-#ifdef __STDC__
-static const float 
-#else
-static float 
-#endif
-one =  1.0000000000e+00, /* 0x3F800000 */
-pi =  3.1415925026e+00, /* 0x40490fda */
-pio2_hi =  1.5707962513e+00, /* 0x3fc90fda */
-pio2_lo =  7.5497894159e-08, /* 0x33a22168 */
-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 */
-
-#ifdef __STDC__
-       float __ieee754_acosf(float x)
-#else
-       float __ieee754_acosf(x)
-       float x;
-#endif
-{
-       float z,p,q,r,w,s,c,df;
-       __int32_t hx,ix;
-       GET_FLOAT_WORD(hx,x);
-       ix = hx&0x7fffffff;
-       if(ix==0x3f800000) {            /* |x|==1 */
-           if(hx>0) return 0.0;        /* acos(1) = 0  */
-           else return pi+(float)2.0*pio2_lo;  /* acos(-1)= pi */
-       } else if(ix>0x3f800000) {      /* |x| >= 1 */
-           return (x-x)/(x-x);         /* acos(|x|>1) is NaN */
-       }
-       if(ix<0x3f000000) {     /* |x| < 0.5 */
-           if(ix<=0x23000000) return pio2_hi+pio2_lo;/*if|x|<2**-57*/
-           z = x*x;
-           p = z*(pS0+z*(pS1+z*(pS2+z*(pS3+z*(pS4+z*pS5)))));
-           q = one+z*(qS1+z*(qS2+z*(qS3+z*qS4)));
-           r = p/q;
-           return pio2_hi - (x - (pio2_lo-x*r));
-       } else  if (hx<0) {             /* x < -0.5 */
-           z = (one+x)*(float)0.5;
-           p = z*(pS0+z*(pS1+z*(pS2+z*(pS3+z*(pS4+z*pS5)))));
-           q = one+z*(qS1+z*(qS2+z*(qS3+z*qS4)));
-           s = __ieee754_sqrtf(z);
-           r = p/q;
-           w = r*s-pio2_lo;
-           return pi - (float)2.0*(s+w);
-       } else {                        /* x > 0.5 */
-           __int32_t idf;
-           z = (one-x)*(float)0.5;
-           s = __ieee754_sqrtf(z);
-           df = s;
-           GET_FLOAT_WORD(idf,df);
-           SET_FLOAT_WORD(df,idf&0xfffff000);
-           c  = (z-df*df)/(s+df);
-           p = z*(pS0+z*(pS1+z*(pS2+z*(pS3+z*(pS4+z*pS5)))));
-           q = one+z*(qS1+z*(qS2+z*(qS3+z*qS4)));
-           r = p/q;
-           w = r*s+c;
-           return (float)2.0*(df+w);
-       }
-}