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[/] [openrisc/] [trunk/] [gnu-old/] [newlib-1.17.0/] [newlib/] [libm/] [common/] [sf_lround.c] - Blame information for rev 158

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Line No. Rev Author Line
1 148 jeremybenn
/*
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 * ====================================================
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 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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 *
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 * Developed at SunPro, a Sun Microsystems, Inc. business.
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 * Permission to use, copy, modify, and distribute this
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 * software is freely granted, provided that this notice
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 * is preserved.
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 * ====================================================
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 */
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#include "fdlibm.h"
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#ifdef __STDC__
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        long int lroundf(float x)
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#else
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        long int lroundf(x)
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        float x;
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#endif
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{
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  __int32_t exponent_less_127;
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  __uint32_t w;
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  long int result;
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  __int32_t sign;
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  GET_FLOAT_WORD (w, x);
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  exponent_less_127 = ((w & 0x7f800000) >> 23) - 127;
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  sign = (w & 0x80000000) != 0 ? -1 : 1;
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  w &= 0x7fffff;
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  w |= 0x800000;
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  if (exponent_less_127 < (int)((8 * sizeof (long int)) - 1))
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    {
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      if (exponent_less_127 < 0)
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        return exponent_less_127 < -1 ? 0 : sign;
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      else if (exponent_less_127 >= 23)
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        result = (long int) w << (exponent_less_127 - 23);
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      else
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        {
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          w += 0x400000 >> exponent_less_127;
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          result = w >> (23 - exponent_less_127);
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        }
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    }
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  else
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      return (long int) x;
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  return sign * result;
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}
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#ifdef _DOUBLE_IS_32BITS
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#ifdef __STDC__
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        long int lround(double x)
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#else
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        long int lround(x)
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        double x;
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#endif
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{
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        return (double) lroundf((float) x);
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}
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#endif /* defined(_DOUBLE_IS_32BITS) */

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