0,0 → 1,55 |
/* lroundf adapted to be llroundf for Newlib, 2009 by Craig Howland. */ |
/* |
* ==================================================== |
* 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" |
|
long long int |
llroundf(float x) |
{ |
__int32_t exponent_less_127; |
__uint32_t w; |
long long int result; |
__int32_t sign; |
|
GET_FLOAT_WORD (w, x); |
exponent_less_127 = ((w & 0x7f800000) >> 23) - 127; |
sign = (w & 0x80000000) != 0 ? -1 : 1; |
w &= 0x7fffff; |
w |= 0x800000; |
|
if (exponent_less_127 < (int)((8 * sizeof (long long int)) - 1)) |
{ |
if (exponent_less_127 < 0) |
return exponent_less_127 < -1 ? 0 : sign; |
else if (exponent_less_127 >= 23) |
result = (long long int) w << (exponent_less_127 - 23); |
else |
{ |
w += 0x400000 >> exponent_less_127; |
result = w >> (23 - exponent_less_127); |
} |
} |
else |
return (long long int) x; |
|
return sign * result; |
} |
|
#ifdef _DOUBLE_IS_32BITS |
|
long long int |
llround(double x) |
{ |
return llroundf((float) x); |
} |
|
#endif /* defined(_DOUBLE_IS_32BITS) */ |