edk2: Remove AppPkg, StdLib, StdLibPrivateInternalFiles

[mirror_edk2.git] / StdLib / LibC / Math / e_log2.c

diff --git a/StdLib/LibC/Math/e_log2.c b/StdLib/LibC/Math/e_log2.c
deleted file mode 100644 (file)
index 5d15cd3..0000000
--- a/StdLib/LibC/Math/e_log2.c
+++ /dev/null
@@ -1,85 +0,0 @@
-\r
-/* @(#)e_log.c 1.3 95/01/18 */\r
-/*\r
- * ====================================================\r
- * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.\r
- *\r
- * Developed at SunSoft, a Sun Microsystems, Inc. business.\r
- * Permission to use, copy, modify, and distribute this\r
- * software is freely granted, provided that this notice\r
- * is preserved.\r
- * ====================================================\r
- */\r
-#include  <LibConfig.h>\r
-#include  <sys/EfiCdefs.h>\r
-#if defined(LIBM_SCCS) && !defined(lint)\r
-__RCSID("$NetBSD: e_log2.c,v 1.1 2005/07/21 12:55:58 christos Exp $");\r
-#endif\r
-\r
-#include "math.h"\r
-#include "math_private.h"\r
-\r
-#if defined(_MSC_VER)           /* Handle Microsoft VC++ compiler specifics. */\r
-  // potential divide by 0 -- near line 53, (x-x)/zero is on purpose\r
-  #pragma warning ( disable : 4723 )\r
-#endif\r
-\r
-static const double\r
-ln2 = 0.6931471805599452862268,\r
-two54   =  1.80143985094819840000e+16,  /* 43500000 00000000 */\r
-Lg1 = 6.666666666666735130e-01,  /* 3FE55555 55555593 */\r
-Lg2 = 3.999999999940941908e-01,  /* 3FD99999 9997FA04 */\r
-Lg3 = 2.857142874366239149e-01,  /* 3FD24924 94229359 */\r
-Lg4 = 2.222219843214978396e-01,  /* 3FCC71C5 1D8E78AF */\r
-Lg5 = 1.818357216161805012e-01,  /* 3FC74664 96CB03DE */\r
-Lg6 = 1.531383769920937332e-01,  /* 3FC39A09 D078C69F */\r
-Lg7 = 1.479819860511658591e-01;  /* 3FC2F112 DF3E5244 */\r
-\r
-static const double zero   =  0.0;\r
-\r
-double\r
-__ieee754_log2(double x)\r
-{\r
-  double hfsq,f,s,z,R,w,t1,t2,dk;\r
-  int32_t k,hx,i,j;\r
-  u_int32_t lx;\r
-\r
-  EXTRACT_WORDS(hx,lx,x);\r
-\r
-  k=0;\r
-  if (hx < 0x00100000) {      /* x < 2**-1022  */\r
-      if (((hx&0x7fffffff)|lx)==0)\r
-    return -two54/zero;   /* log(+-0)=-inf */\r
-      if (hx<0) return (x-x)/zero;  /* log(-#) = NaN */\r
-      k -= 54; x *= two54; /* subnormal number, scale up x */\r
-      GET_HIGH_WORD(hx,x);\r
-  }\r
-  if (hx >= 0x7ff00000) return x+x;\r
-  k += (hx>>20)-1023;\r
-  hx &= 0x000fffff;\r
-  i = (hx+0x95f64)&0x100000;\r
-  SET_HIGH_WORD(x,hx|(i^0x3ff00000)); /* normalize x or x/2 */\r
-  k += (i>>20);\r
-  f = x-1.0;\r
-  dk = (double)k;\r
-  if((0x000fffff&(2+hx))<3) { /* |f| < 2**-20 */\r
-      if (f==zero)\r
-        return (dk);\r
-      R = f*f*(0.5-0.33333333333333333*f);\r
-      return (dk-(R-f)/ln2);\r
-  }\r
-  s = f/(2.0+f);\r
-  z = s*s;\r
-  i = hx-0x6147a;\r
-  w = z*z;\r
-  j = 0x6b851-hx;\r
-  t1= w*(Lg2+w*(Lg4+w*Lg6));\r
-  t2= z*(Lg1+w*(Lg3+w*(Lg5+w*Lg7)));\r
-  i |= j;\r
-  R = t2+t1;\r
-  if(i>0) {\r
-      hfsq=0.5*f*f;\r
-      return (dk-(hfsq-s*(hfsq+R)-f)/ln2);\r
-  } else\r
-    return (dk-((s*(f-R))-f)/ln2);\r
-}\r