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Diffstat (limited to 'newlib/libm/math/s_floor.c')
-rw-r--r-- | newlib/libm/math/s_floor.c | 134 |
1 files changed, 0 insertions, 134 deletions
diff --git a/newlib/libm/math/s_floor.c b/newlib/libm/math/s_floor.c deleted file mode 100644 index 65e234e..0000000 --- a/newlib/libm/math/s_floor.c +++ /dev/null @@ -1,134 +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. - * ==================================================== - */ - -/* -FUNCTION -<<floor>>, <<floorf>>, <<ceil>>, <<ceilf>>---floor and ceiling -INDEX - floor -INDEX - floorf -INDEX - ceil -INDEX - ceilf - -ANSI_SYNOPSIS - #include <math.h> - double floor(double <[x]>); - float floorf(float <[x]>); - double ceil(double <[x]>); - float ceilf(float <[x]>); - -TRAD_SYNOPSIS - #include <math.h> - double floor(<[x]>) - double <[x]>; - float floorf(<[x]>) - float <[x]>; - double ceil(<[x]>) - double <[x]>; - float ceilf(<[x]>) - float <[x]>; - -DESCRIPTION -<<floor>> and <<floorf>> find -@tex -$\lfloor x \rfloor$, -@end tex -the nearest integer less than or equal to <[x]>. -<<ceil>> and <<ceilf>> find -@tex -$\lceil x\rceil$, -@end tex -the nearest integer greater than or equal to <[x]>. - -RETURNS -<<floor>> and <<ceil>> return the integer result as a double. -<<floorf>> and <<ceilf>> return the integer result as a float. - -PORTABILITY -<<floor>> and <<ceil>> are ANSI. -<<floorf>> and <<ceilf>> are extensions. - - -*/ - -/* - * floor(x) - * Return x rounded toward -inf to integral value - * Method: - * Bit twiddling. - * Exception: - * Inexact flag raised if x not equal to floor(x). - */ - -#include "fdlibm.h" - -#ifndef _DOUBLE_IS_32BITS - -#ifdef __STDC__ -static const double huge = 1.0e300; -#else -static double huge = 1.0e300; -#endif - -#ifdef __STDC__ - double floor(double x) -#else - double floor(x) - double x; -#endif -{ - __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) {/* return 0*sign(x) if |x|<1 */ - if(i0>=0) {i0=i1=0;} - else if(((i0&0x7fffffff)|i1)!=0) - { i0=0xbff00000;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 = ((__uint32_t)(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; -} - -#endif /* _DOUBLE_IS_32BITS */ |