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[Octave-bug-tracker] [bug #61968] pow2 with two arguments is not Matlab
From: |
Kai Torben Ohlhus |
Subject: |
[Octave-bug-tracker] [bug #61968] pow2 with two arguments is not Matlab compatible |
Date: |
Sun, 6 Feb 2022 09:34:15 -0500 (EST) |
Follow-up Comment #19, bug #61968 (project octave):
Okay, I fixed the remaining issues and I am sorry for the long ldexp(f)
discussion. At some point I started to confuse myself. In short std::ldexp
works:
1. C11 has ldexp and ldexpf and a macro to overload.
2. C++11 only has std::ldexp with proper overload for float and "long double".
No need to call something else and
https://en.cppreference.com/w/cpp/numeric/math/ldexp should be corrected to
not contain those overloads with "f" and "l" suffix 😓
> I was thinking the only difference between `elem` and `xelem` is that the
latter doesn't check for out-of-range indices. By that, it's slightly more
efficient than `elem`. If you are sure that you'll not exceed the range of the
array, you could use `xelem`. Is there really a difference with respect to
"unique data"?
The difference between elem and xelem is best described in the code
https://octave.org/doxygen/6.2.0/df/dd0/Array_8h_source.html#l00499
T& elem (octave_idx_type n)
{
make_unique ();
return xelem (n);
}
The feature with range checking is "checkelem()".
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- [Octave-bug-tracker] [bug #61968] pow2 with two arguments is not Matlab compatible, (continued)
- [Octave-bug-tracker] [bug #61968] pow2 with two arguments is not Matlab compatible, Markus Mützel, 2022/02/01
- [Octave-bug-tracker] [bug #61968] pow2 with two arguments is not Matlab compatible, Kai Torben Ohlhus, 2022/02/04
- [Octave-bug-tracker] [bug #61968] pow2 with two arguments is not Matlab compatible, Kai Torben Ohlhus, 2022/02/04
- [Octave-bug-tracker] [bug #61968] pow2 with two arguments is not Matlab compatible, Markus Mützel, 2022/02/04
- [Octave-bug-tracker] [bug #61968] pow2 with two arguments is not Matlab compatible, Markus Mützel, 2022/02/04
- [Octave-bug-tracker] [bug #61968] pow2 with two arguments is not Matlab compatible, Kai Torben Ohlhus, 2022/02/05
- [Octave-bug-tracker] [bug #61968] pow2 with two arguments is not Matlab compatible, John W. Eaton, 2022/02/05
- [Octave-bug-tracker] [bug #61968] pow2 with two arguments is not Matlab compatible, John W. Eaton, 2022/02/05
- [Octave-bug-tracker] [bug #61968] pow2 with two arguments is not Matlab compatible, Markus Mützel, 2022/02/06
- [Octave-bug-tracker] [bug #61968] pow2 with two arguments is not Matlab compatible, Markus Mützel, 2022/02/06
- [Octave-bug-tracker] [bug #61968] pow2 with two arguments is not Matlab compatible,
Kai Torben Ohlhus <=
- [Octave-bug-tracker] [bug #61968] pow2 with two arguments is not Matlab compatible, Kai Torben Ohlhus, 2022/02/06
- [Octave-bug-tracker] [bug #61968] pow2 with two arguments is not Matlab compatible, Markus Mützel, 2022/02/06
- [Octave-bug-tracker] [bug #61968] pow2 with two arguments is not Matlab compatible, Markus Mützel, 2022/02/06
- [Octave-bug-tracker] [bug #61968] pow2 with two arguments is not Matlab compatible, Kai Torben Ohlhus, 2022/02/06
- [Octave-bug-tracker] [bug #61968] pow2 with two arguments is not Matlab compatible, Markus Mützel, 2022/02/07
- [Octave-bug-tracker] [bug #61968] pow2 with two arguments is not Matlab compatible, anonymous, 2022/02/08
- [Octave-bug-tracker] [bug #61968] pow2 with two arguments is not Matlab compatible, Markus Mützel, 2022/02/08