Please do not use previously mentioned routine, it missed 1 corner
case where 32=num_bits_word(d)
Revised routine that passes (cd test; make bntest).
Does it mean that previous version didn't actually pass the test? I mean
if it did on your CPU, but not mine, probably we could learn
Forgive my lack of knowledge in your existing code. But it is really
designed with optimization in mind? What was the driving force for
the C function?
If it is optimized what is the time required?
I jumped way to early at the fast conclusion I must admit. Because I
really never had speed in
]
Subject Re: PPC bn_div_words routine rewrite
Okay, having actually did what Andy suggested, i.e. the one liner fix
in the assembly code, bn_div_words returns the correct results.
Note that the final version, one committed to all relevant OpenSSL
branches since couple
Architect
IBM Crypto for C Team
IBM/Tivoli Gold Coast Office
Andy Polyakov [EMAIL PROTECTED]
Sent by: [EMAIL PROTECTED]
06/07/2005 07:49 AM
Please respond to
openssl-dev
To openssl-dev@openssl.org
cc [EMAIL PROTECTED]
Subject Re: PPC bn_div_words routine rewrite
Let's start the week off with less hostility and more productive
criticism on this topic.
If you want productivity, then provide real evidence in form of stack
backtrace at segmentation violation point, disassemble output in the
vicinity of segmentation violation point and 'info registers'
.
After reading my email. I must say I was the unfriendly one, I
apologize for that.
More debugging evidence to come.
-- Forwarded message --
From: Murch, Christopher [EMAIL PROTECTED]
Date: Jul 1, 2005 9:46 AM
Subject: RE: PPC bn_div_words routine rewrite
To: David Ho
.
-- Forwarded message --
From: Murch, Christopher [EMAIL PROTECTED]
Date: Jul 1, 2005 9:46 AM
Subject: RE: PPC bn_div_words routine rewrite
To: David Ho [EMAIL PROTECTED]
David,
I had observed the same issue on ppc 8xx machines after upgrading to the asm
version of the BN routines
: Jul 1, 2005 9:46 AM
Subject: RE: PPC bn_div_words routine rewrite
To: David Ho [EMAIL PROTECTED]
David,
I had observed the same issue on ppc 8xx machines after upgrading to the
asm
version of the BN routines. Thank you very much for your work for the
fix.
My
Let's take first call to BN_div_word for example from BN_bn2dec, the
parameter being passed to BN_div_word is (a=35, w=10) (decimal
numbers). It then calls the bn_div_words with (h=0, l=35,
d=10) if you examine the code in linux_ppc32.s it will exit
early on because h is 0. the
. I must say I was the unfriendly one, I
apologize for that.
More debugging evidence to come.
-- Forwarded message --
From: Murch, Christopher [EMAIL PROTECTED]
Date: Jul 1, 2005 9:46 AM
Subject: RE: PPC bn_div_words routine rewrite
To: David Ho
Okay, having actually did what Andy suggested, i.e. the one liner fix
in the assembly code, bn_div_words returns the correct results.
Note that the final version, one committed to all relevant OpenSSL
branches since couple of days ago and one which actually made to just
released 0.9.8, is a
The reason I had to redo this routine, in case anyone is wondering, is
because ssh-keygen segfaults when this assembly routine returns junk
to the BN_div_word function. On a ppc, if you issue the command
ssh-keygen -t rsa1 -f /etc/ssh/ssh_host_key -N
The program craps out when it tries to
The reason I had to redo this routine, in case anyone is wondering, is
because ssh-keygen segfaults when this assembly routine returns junk
to the BN_div_word function. On a ppc, if you issue the command
ssh-keygen -t rsa1 -f /etc/ssh/ssh_host_key -N
The program craps out when it tries to
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