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Rev | Author | Line No. | Line |
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3362 | Serge | 1 | /* wf_sqrt.c -- float version of w_sqrt.c. |
2 | * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com. |
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3 | */ |
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4 | |||
5 | /* |
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6 | * ==================================================== |
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7 | * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. |
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8 | * |
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9 | * Developed at SunPro, a Sun Microsystems, Inc. business. |
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10 | * Permission to use, copy, modify, and distribute this |
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11 | * software is freely granted, provided that this notice |
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12 | * is preserved. |
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13 | * ==================================================== |
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14 | */ |
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15 | |||
16 | /* |
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17 | * wrapper sqrtf(x) |
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18 | */ |
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19 | |||
20 | #include "fdlibm.h" |
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21 | #include |
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22 | |||
23 | #ifdef __STDC__ |
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24 | float sqrtf(float x) /* wrapper sqrtf */ |
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25 | #else |
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26 | float sqrtf(x) /* wrapper sqrtf */ |
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27 | float x; |
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28 | #endif |
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29 | { |
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30 | #ifdef _IEEE_LIBM |
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31 | return __ieee754_sqrtf(x); |
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32 | #else |
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33 | float z; |
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34 | struct exception exc; |
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35 | z = __ieee754_sqrtf(x); |
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36 | if(_LIB_VERSION == _IEEE_ || isnan(x)) return z; |
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37 | if(x<(float)0.0) { |
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38 | /* sqrtf(negative) */ |
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39 | exc.type = DOMAIN; |
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40 | exc.name = "sqrtf"; |
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41 | exc.err = 0; |
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42 | exc.arg1 = exc.arg2 = (double)x; |
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43 | if (_LIB_VERSION == _SVID_) |
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44 | exc.retval = 0.0; |
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45 | else |
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46 | exc.retval = 0.0/0.0; |
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47 | if (_LIB_VERSION == _POSIX_) |
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48 | errno = EDOM; |
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49 | else if (!matherr(&exc)) { |
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50 | errno = EDOM; |
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51 | } |
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52 | if (exc.err != 0) |
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53 | errno = exc.err; |
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54 | return (float)exc.retval; |
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55 | } else |
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56 | return z; |
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57 | #endif |
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58 | } |
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59 | |||
60 | #ifdef _DOUBLE_IS_32BITS |
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61 | |||
62 | #ifdef __STDC__ |
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63 | double sqrt(double x) |
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64 | #else |
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65 | double sqrt(x) |
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66 | double x; |
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67 | #endif |
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68 | { |
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69 | return (double) sqrtf((float) x); |
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70 | } |
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71 | |||
72 | #endif /* defined(_DOUBLE_IS_32BITS) */(float)0.0)> |