Last change
on this file since 577 was
444,
checked in by satin@…, 6 years ago
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add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc
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File size:
1.3 KB
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Line | |
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1 | /* lroundf adapted to be llroundf for Newlib, 2009 by Craig Howland. */ |
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2 | /* |
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3 | * ==================================================== |
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4 | * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. |
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5 | * |
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6 | * Developed at SunPro, a Sun Microsystems, Inc. business. |
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7 | * Permission to use, copy, modify, and distribute this |
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8 | * software is freely granted, provided that this notice |
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9 | * is preserved. |
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10 | * ==================================================== |
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11 | */ |
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12 | |
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13 | #include "fdlibm.h" |
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14 | |
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15 | long long int |
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16 | llroundf(float x) |
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17 | { |
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18 | __int32_t exponent_less_127; |
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19 | __uint32_t w; |
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20 | long long int result; |
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21 | __int32_t sign; |
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22 | |
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23 | GET_FLOAT_WORD (w, x); |
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24 | exponent_less_127 = ((w & 0x7f800000) >> 23) - 127; |
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25 | sign = (w & 0x80000000) != 0 ? -1 : 1; |
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26 | w &= 0x7fffff; |
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27 | w |= 0x800000; |
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28 | |
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29 | if (exponent_less_127 < (int)((8 * sizeof (long long int)) - 1)) |
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30 | { |
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31 | if (exponent_less_127 < 0) |
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32 | return exponent_less_127 < -1 ? 0 : sign; |
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33 | else if (exponent_less_127 >= 23) |
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34 | result = (long long int) w << (exponent_less_127 - 23); |
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35 | else |
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36 | { |
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37 | w += 0x400000 >> exponent_less_127; |
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38 | result = w >> (23 - exponent_less_127); |
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39 | } |
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40 | } |
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41 | else |
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42 | return (long long int) x; |
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43 | |
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44 | return sign * result; |
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45 | } |
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46 | |
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47 | #ifdef _DOUBLE_IS_32BITS |
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48 | |
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49 | long long int |
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50 | llround(double x) |
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51 | { |
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52 | return llroundf((float) x); |
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53 | } |
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54 | |
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55 | #endif /* defined(_DOUBLE_IS_32BITS) */ |
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