: [Numpy-discussion] Integer overflow in test_einsum (1.7.1)
14.05.2013 21:52, Toder, Evgeny kirjoitti:
> So, does numpy implement modular (two's complement)
> arithmetic for signed types
[clip]
Numpy leaves integer arithmetic to the C compiler.
Python and its C modules however by defa
14.05.2013 21:52, Toder, Evgeny kirjoitti:
> So, does numpy implement modular (two’s complement)
> arithmetic for signed types
[clip]
Numpy leaves integer arithmetic to the C compiler.
Python and its C modules however by default specify -fwrapv for gcc and
its ilk, so the behavior might seem cons
guarantees?
Eugene
From: numpy-discussion-boun...@scipy.org
[mailto:numpy-discussion-boun...@scipy.org] On Behalf Of Charles R Harris
Sent: Tuesday, May 14, 2013 2:25 PM
To: Discussion of Numerical Python
Subject: Re: [Numpy-discussion] Integer overflow in test_einsum (1.7.1)
I don't know if
On Tue, May 14, 2013 at 11:26 AM, Toder, Evgeny
wrote:
> Hello,
>
> ** **
>
> One of the test cases in test_einsum causes integer overflow for i2 type.
> The test goes like this:
>
> ** **
>
> >>> import numpy as np
>
> >>> dtype = 'i2'
>
> >>> n = 15
>
> >>> a = np.arange(4*n
Hello,
One of the test cases in test_einsum causes integer overflow for i2 type. The
test goes like this:
>>> import numpy as np
>>> dtype = 'i2'
>>> n = 15
>>> a = np.arange(4*n, dtype=dtype).reshape(4,n)
>>> b = np.arange(n*6, dtype=dtype).reshape(n,6)
>>> c = np.arange(24, dtype=dtype).reshap
