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Diffstat (limited to 'newlib/libm/math/sf_ceil.c')
| -rw-r--r-- | newlib/libm/math/sf_ceil.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/newlib/libm/math/sf_ceil.c b/newlib/libm/math/sf_ceil.c new file mode 100644 index 00000000000..85f0e971499 --- /dev/null +++ b/newlib/libm/math/sf_ceil.c @@ -0,0 +1,69 @@ +/* sf_ceil.c -- float version of s_ceil.c. + * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com. + */ + +/* + * ==================================================== + * 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. + * ==================================================== + */ + +#include "fdlibm.h" + +#ifdef __STDC__ +static const float huge = 1.0e30; +#else +static float huge = 1.0e30; +#endif + +#ifdef __STDC__ + float ceilf(float x) +#else + float ceilf(x) + float x; +#endif +{ + __int32_t i0,j0; + __uint32_t i; + GET_FLOAT_WORD(i0,x); + j0 = ((i0>>23)&0xff)-0x7f; + if(j0<23) { + if(j0<0) { /* raise inexact if x != 0 */ + if(huge+x>(float)0.0) {/* return 0*sign(x) if |x|<1 */ + if(i0<0) {i0=0x80000000;} + else if(i0!=0) { i0=0x3f800000;} + } + } else { + i = (0x007fffff)>>j0; + if((i0&i)==0) return x; /* x is integral */ + if(huge+x>(float)0.0) { /* raise inexact flag */ + if(i0>0) i0 += (0x00800000)>>j0; + i0 &= (~i); + } + } + } else { + if(j0==0x80) return x+x; /* inf or NaN */ + else return x; /* x is integral */ + } + SET_FLOAT_WORD(x,i0); + return x; +} + +#ifdef _DOUBLE_IS_32BITS + +#ifdef __STDC__ + double ceil(double x) +#else + double ceil(x) + double x; +#endif +{ + return (double) ceilf((float) x); +} + +#endif /* defined(_DOUBLE_IS_32BITS) */ |