[PATCH v2 3/3] msvcr120: Add log1p.

[Alex Henrie]

2017-07-14 4:20 GMT-06:00 Piotr Caban <piotr.caban at gmail.com>:
> On 07/14/17 07:14, Alex Henrie wrote:
>>
>> +/*********************************************************************
>> + *      log1pf (MSVCR120.@)
>> + */
>> +float CDECL MSVCR120_log1pf(float x)
>> +{
>> +#ifdef HAVE_LOG1PF
>> +    return log1pf(x);
>> +#else
>> +    return log(1 + x);
>> +#endif
>> +}
>
> Please also set errno in this function.

The Microsoft implementations of log2 and log1p are buggy: Despite
what MSDN says, they do not set errno.

In fact, as far as I can tell, Microsoft's acosh, atanh, and expm1
don't set errno either. Do you want tests for this?

-Alex