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Rev 77685 Rev 90186
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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(shape) || ISNAN(scale))
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    if (ISNAN(x) || ISNAN(shape) || ISNAN(scale))
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	return x + shape + scale;
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	return x + shape + scale;
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#endif
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#endif
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    if(shape <= 0 || scale <= 0) ML_WARN_return_NAN;
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    if(shape < 0 || scale <= 0) ML_WARN_return_NAN;
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    R_P_bounds_01(x, 0., ML_POSINF);
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    if (x <= 0)
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	return R_DT_0;
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    x = -pow(x / scale, shape);
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    x = -pow(x / scale, shape);
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    return lower_tail
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    return lower_tail
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	? (log_p ? R_Log1_Exp(x) : -expm1(x))
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	? (log_p ? R_Log1_Exp(x) : -expm1(x))
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	: R_D_exp(x);
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	: R_D_exp(x);
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}
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}