diff options
Diffstat (limited to 'src/math/s_trunc.c')
-rw-r--r-- | src/math/s_trunc.c | 58 |
1 files changed, 0 insertions, 58 deletions
diff --git a/src/math/s_trunc.c b/src/math/s_trunc.c deleted file mode 100644 index 02c65567..00000000 --- a/src/math/s_trunc.c +++ /dev/null @@ -1,58 +0,0 @@ -/* @(#)s_floor.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. - * ==================================================== - */ - -/* - * trunc(x) - * Return x rounded toward 0 to integral value - * Method: - * Bit twiddling. - * Exception: - * Inexact flag raised if x not equal to trunc(x). - */ - -#include <math.h> -#include "math_private.h" - -static const double huge = 1.0e300; - -double -trunc(double x) -{ - int32_t i0,i1,j0; - uint32_t 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) {/* |x|<1, so return 0*sign(x) */ - i0 &= 0x80000000U; - i1 = 0; - } - } else { - i = (0x000fffff)>>j0; - if(((i0&i)|i1)==0) return x; /* x is integral */ - if(huge+x>0.0) { /* raise inexact flag */ - 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 = ((uint32_t)(0xffffffff))>>(j0-20); - if((i1&i)==0) return x; /* x is integral */ - if(huge+x>0.0) /* raise inexact flag */ - i1 &= (~i); - } - INSERT_WORDS(x,i0,i1); - return x; -} |