X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=StdLib%2FLibC%2FMath%2Fe_log2.c;fp=StdLib%2FLibC%2FMath%2Fe_log2.c;h=0000000000000000000000000000000000000000;hp=5d15cd3b0116e9ce9054e240d70f6cd68134ce7d;hb=964f432b9b0afe103c41c7613fade3e699118afe;hpb=e2d3a25f1a3135221a9c8061e1b8f90245d727eb

diff --git a/StdLib/LibC/Math/e_log2.c b/StdLib/LibC/Math/e_log2.c
deleted file mode 100644
index 5d15cd3b01..0000000000
--- a/StdLib/LibC/Math/e_log2.c
+++ /dev/null
@@ -1,85 +0,0 @@
-
-/* @(#)e_log.c 1.3 95/01/18 */
-/*
- * ====================================================
- * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
- *
- * Developed at SunSoft, a Sun Microsystems, Inc. business.
- * Permission to use, copy, modify, and distribute this
- * software is freely granted, provided that this notice
- * is preserved.
- * ====================================================
- */
-#include  <LibConfig.h>
-#include  <sys/EfiCdefs.h>
-#if defined(LIBM_SCCS) && !defined(lint)
-__RCSID("$NetBSD: e_log2.c,v 1.1 2005/07/21 12:55:58 christos Exp $");
-#endif
-
-#include "math.h"
-#include "math_private.h"
-
-#if defined(_MSC_VER)           /* Handle Microsoft VC++ compiler specifics. */
-  // potential divide by 0 -- near line 53, (x-x)/zero is on purpose
-  #pragma warning ( disable : 4723 )
-#endif
-
-static const double
-ln2 = 0.6931471805599452862268,
-two54   =  1.80143985094819840000e+16,  /* 43500000 00000000 */
-Lg1 = 6.666666666666735130e-01,  /* 3FE55555 55555593 */
-Lg2 = 3.999999999940941908e-01,  /* 3FD99999 9997FA04 */
-Lg3 = 2.857142874366239149e-01,  /* 3FD24924 94229359 */
-Lg4 = 2.222219843214978396e-01,  /* 3FCC71C5 1D8E78AF */
-Lg5 = 1.818357216161805012e-01,  /* 3FC74664 96CB03DE */
-Lg6 = 1.531383769920937332e-01,  /* 3FC39A09 D078C69F */
-Lg7 = 1.479819860511658591e-01;  /* 3FC2F112 DF3E5244 */
-
-static const double zero   =  0.0;
-
-double
-__ieee754_log2(double x)
-{
-  double hfsq,f,s,z,R,w,t1,t2,dk;
-  int32_t k,hx,i,j;
-  u_int32_t lx;
-
-  EXTRACT_WORDS(hx,lx,x);
-
-  k=0;
-  if (hx < 0x00100000) {      /* x < 2**-1022  */
-      if (((hx&0x7fffffff)|lx)==0)
-    return -two54/zero;   /* log(+-0)=-inf */
-      if (hx<0) return (x-x)/zero;  /* log(-#) = NaN */
-      k -= 54; x *= two54; /* subnormal number, scale up x */
-      GET_HIGH_WORD(hx,x);
-  }
-  if (hx >= 0x7ff00000) return x+x;
-  k += (hx>>20)-1023;
-  hx &= 0x000fffff;
-  i = (hx+0x95f64)&0x100000;
-  SET_HIGH_WORD(x,hx|(i^0x3ff00000)); /* normalize x or x/2 */
-  k += (i>>20);
-  f = x-1.0;
-  dk = (double)k;
-  if((0x000fffff&(2+hx))<3) { /* |f| < 2**-20 */
-      if (f==zero)
-        return (dk);
-      R = f*f*(0.5-0.33333333333333333*f);
-      return (dk-(R-f)/ln2);
-  }
-  s = f/(2.0+f);
-  z = s*s;
-  i = hx-0x6147a;
-  w = z*z;
-  j = 0x6b851-hx;
-  t1= w*(Lg2+w*(Lg4+w*Lg6));
-  t2= z*(Lg1+w*(Lg3+w*(Lg5+w*Lg7)));
-  i |= j;
-  R = t2+t1;
-  if(i>0) {
-      hfsq=0.5*f*f;
-      return (dk-(hfsq-s*(hfsq+R)-f)/ln2);
-  } else
-    return (dk-((s*(f-R))-f)/ln2);
-}