| /* |
| * ==================================================== |
| * 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__ |
| long int lroundf(float x) |
| #else |
| long int lroundf(x) |
| float x; |
| #endif |
| { |
| __int32_t exponent_less_127; |
| __uint32_t w; |
| 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 int)) - 1)) |
| { |
| if (exponent_less_127 < 0) |
| return exponent_less_127 < -1 ? 0 : sign; |
| else if (exponent_less_127 >= 23) |
| result = (long int) w << (exponent_less_127 - 23); |
| else |
| { |
| w += 0x400000 >> exponent_less_127; |
| result = w >> (23 - exponent_less_127); |
| } |
| } |
| else |
| return (long int) x; |
| |
| return sign * result; |
| } |
| |
| #ifdef _DOUBLE_IS_32BITS |
| |
| #ifdef __STDC__ |
| long int lround(double x) |
| #else |
| long int lround(x) |
| double x; |
| #endif |
| { |
| return lroundf((float) x); |
| } |
| |
| #endif /* defined(_DOUBLE_IS_32BITS) */ |