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Rev 68947 Rev 77685
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{
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{
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#ifdef IEEE_754
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#ifdef IEEE_754
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    if (ISNAN(x) || ISNAN(lambda))
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    if (ISNAN(x) || ISNAN(lambda))
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	return x + lambda;
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	return x + lambda;
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#endif
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#endif
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    if(lambda < 0.) ML_ERR_return_NAN;
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    if(lambda < 0.) ML_WARN_return_NAN;
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    if (x < 0)		return R_DT_0;
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    if (x < 0)		return R_DT_0;
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    if (lambda == 0.)	return R_DT_1;
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    if (lambda == 0.)	return R_DT_1;
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    if (!R_FINITE(x))	return R_DT_1;
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    if (!R_FINITE(x))	return R_DT_1;
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    x = floor(x + 1e-7);
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    x = floor(x + 1e-7);
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