ScaLAPACK Archives

[Scalapack] CROT and ZROT

Deaglan, great to have your contributions!

On 3/5/12 11:30 AM, James, Rodney wrote:

It would be great to get your routines into ScaLAPACK.

I can work with you to get this done, and will contact you soon so that we 
can discuss how we can get this done.


Rodney James

On Mar 2, 2012, at 11:41 AM, Deaglan O Halligan wrote:


I have had semi-completed versions of these routines for some time, but I 
was waiting for the new PCLAHQR to be available, which I am aware is 
available with the latest release. Time permitting, I'd like to try putting 
the new PCLAHQR in my drivers, and would be willing to work with anyone who 
is interested.

Deaglan Halligan

----- Original Message -----
From: Julien Langou<Julien.Langou@Domain.Removed>
To: scalapack@Domain.Removed
Sent: Fri, 02 Mar 2012 11:36:52 -0500 (EST)
Subject: Re: [Scalapack] CROT and ZROT

I [ .. ] forgot to CC the mailing list. Rodney

Begin forwarded message:

From: "James, Rodney"<RODNEY.JAMES@Domain.Removed>
Subject: Re: [Scalapack] CROT and ZROT
Date: March 2, 2012 7:30:31 AM MST
To: Akira Satou<a-satou@Domain.Removed>

Hi Akira,

Thanks for pointing this out.  We actually fixed this bug in late January; 
the new code is in the scalapack SVN repository, and will be included in 
the next release.

I agree that a complex version of the parallel QR code would be really 
nice to have.  We have been discussing when and how to get this done, but 
have no definite schedule yet.  Hopefully we will get to it by this 

Rodney James

On Mar 2, 2012, at 6:09 AM, Akira Satou wrote:

ScaLAPACK team,

Hi, I found a tiny bug in scalapack-2.0.1. In SRC/pblas.h,

line 546: #define crot_ CROT
line 558: #define zrot_ ZROT

should be added to use PCLAHQR and PZLAHQR.
I got an link error when compiling a C++ code with a call to PZLAHQR
on a machine where ScaLAPACK uses BLAS and LAPACK subroutines
have uppercase names. With these lines the code worked fine.

By the way, it would be really nice if PCHSEQR and PZHSEQR would
be implemented.

Akira Satou

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