diff options
Diffstat (limited to 'recipes/dietlibc/files/ceil.patch')
| -rw-r--r-- | recipes/dietlibc/files/ceil.patch | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/recipes/dietlibc/files/ceil.patch b/recipes/dietlibc/files/ceil.patch new file mode 100644 index 0000000000..e2295d27fa --- /dev/null +++ b/recipes/dietlibc/files/ceil.patch @@ -0,0 +1,97 @@ +Index: dietlibc-0.31/libm/ceil.c +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ dietlibc-0.31/libm/ceil.c 2009-02-01 02:54:28.533109301 +0100 +@@ -0,0 +1,92 @@ ++/* @(#)s_ceil.c 5.1 93/09/24 */ ++/* ++ * ==================================================== ++ * 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. ++ * ==================================================== ++ */ ++ ++/* ++ * ceil(x) ++ * Return x rounded toward -inf to integral value ++ * Method: ++ * Bit twiddling. ++ * Exception: ++ * Inexact flag raised if x not equal to ceil(x). ++ */ ++ ++#include <math.h> ++ ++typedef union { ++ double value; ++ struct { ++ unsigned int lsw; ++ unsigned int msw; ++ } parts; ++} ieee_double_shape_type; ++ ++/* Get two 32 bit ints from a double. */ ++ ++#define EXTRACT_WORDS(ix0,ix1,d) \ ++do { \ ++ ieee_double_shape_type ew_u; \ ++ ew_u.value = (d); \ ++ (ix0) = ew_u.parts.msw; \ ++ (ix1) = ew_u.parts.lsw; \ ++} while (0) ++ ++#define INSERT_WORDS(d,ix0,ix1) \ ++do { \ ++ ieee_double_shape_type iw_u; \ ++ iw_u.parts.msw = (ix0); \ ++ iw_u.parts.lsw = (ix1); \ ++ (d) = iw_u.value; \ ++} while (0) ++ ++static const double huge = 1.0e300; ++ ++double ceil(double x) ++{ ++ int i0,i1,j0; ++ unsigned int i,j; ++ EXTRACT_WORDS(i0,i1,x); ++ j0 = ((i0>>20)&0x7ff)-0x3ff; ++ if(j0<20) { ++ if(j0<0) { /* raise inexact if x != 0 */ ++ if(huge+x>0.0) {/* return 0*sign(x) if |x|<1 */ ++ if(i0<0) {i0=0x80000000;i1=0;} ++ else if((i0|i1)!=0) { i0=0x3ff00000;i1=0;} ++ } ++ } else { ++ i = (0x000fffff)>>j0; ++ if(((i0&i)|i1)==0) return x; /* x is integral */ ++ if(huge+x>0.0) { /* raise inexact flag */ ++ if(i0>0) i0 += (0x00100000)>>j0; ++ i0 &= (~i); i1=0; ++ } ++ } ++ } else if (j0>51) { ++ if(j0==0x400) return x+x; /* inf or NaN */ ++ else return x; /* x is integral */ ++ } else { ++ i = ((unsigned int)(0xffffffff))>>(j0-20); ++ if((i1&i)==0) return x; /* x is integral */ ++ if(huge+x>0.0) { /* raise inexact flag */ ++ if(i0>0) { ++ if(j0==20) i0+=1; ++ else { ++ j = i1 + (1<<(52-j0)); ++ if(j<i1) i0+=1; /* got a carry */ ++ i1 = j; ++ } ++ } ++ i1 &= (~i); ++ } ++ } ++ INSERT_WORDS(x,i0,i1); ++ return x; ++} |