Displaying 20 results from an estimated 2000 matches similar to: "Checksum question"
2003 Aug 07
2
crc
I'm trying to generate the 4-byte crc code for the comment tag in an ogg
file.. Can anyone point me to a function where this is done?
Unfortunately, I can't use the lib directly, and the crc function I did
find in it doesn't seem to do what I want directly. But, that might mean
I'm not feeding it the right chunk of data.
Any details would be helpful - yes I read the docs and I
2002 Jul 12
0
Problem with checksums
I'm trying to write a program that reads an ogg stream and check all the
CRC values along the way. But I have big trouble with computing the
checksum, or at least I never got checksums that match the one that is in
the ogg file.
I do set the CRC field in the header to 0 before calculating it. I start
with 0 and have no xor at the end. I feed page header with all lacing
values and the page
2017 Nov 01
5
RFC: [X86] Introducing command line options to prefer narrower vector instructions even when wider instructions are available
Hello all,
I would like to propose adding the -mprefer-avx256 and -mprefer-avx128
command line flags supported by latest GCC to clang. These flags will be
used to limit the vector register size presented by TTI to the vectorizers.
The backend will still be able to use wider registers for code written
using the instrinsics in x86intrin.h. And the backend will still be able to
use AVX512VL
2006 Apr 22
2
Major internal changes, TI DSP build change
> >I fixed it in svn. Could you check that?
>
> Now all platforms match again. Note that the measured SNR for this test
> sample is lower than with the broken code (10.87 vs 11.10), but of course
> this is no way to judge the real quality.
SNR, especially on a single sample, can be very misleading. Yet, could
you just check that the DSP results match what you get on a PC?
2004 Mar 13
1
Ogg / Vorbis Compiling under W32 with MingW ** Problem **
I want to compile ogg and vorbis(version 1.01) under mingw.
In the console i typed
./configure
make
but there is a lot of error while making. here is the errors
$ ./configure
checking for a BSD-compatible install... /bin/install -c
checking whether build environment is sane... yes
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking whether to enable maintainer-specific
2017 Nov 03
2
RFC: [X86] Introducing command line options to prefer narrower vector instructions even when wider instructions are available
On Thu, Nov 2, 2017 at 7:05 PM James Y Knight via llvm-dev <
llvm-dev at lists.llvm.org> wrote:
> On Wed, Nov 1, 2017 at 7:35 PM, Craig Topper via llvm-dev <
> llvm-dev at lists.llvm.org> wrote:
>
>> Hello all,
>>
>>
>>
>> I would like to propose adding the -mprefer-avx256 and -mprefer-avx128
>> command line flags supported by latest GCC to
2010 Sep 19
1
odds ratios for n-way tables: seeking an *apply-able method
I'm looking for a way to generalize the calculation of (log) odds
ratios for 2 x 2 x {strata} frequency
tables in vcd::oddsratio() to R x C x {strata} tables.
For an R x C table, F, odds ratios can be defined
in several ways; one simple way, particularly for tables with ordered
factors, is to calculate the
set of continuation odds ratios, based on the (R-1)x(C-1) set of 2x2
tables with
2011 Feb 18
3
How to change dataframe to tables
The data is in the attachment.
What I wanna get is:
, , Sex = Male
Eye
Hair Brown Blue Hazel Green
Black 32 11 10 3
Brown 53 50 25 15
Red 10 10 7 7
Blond 3 30 5 8
, , Sex = Female
Eye
Hair Brown Blue Hazel Green
Black 36 9 5 2
Brown 66 34 29 14
Red 16 7 7 7
Blond 4
2017 Nov 07
2
RFC: [X86] Introducing command line options to prefer narrower vector instructions even when wider instructions are available
On Fri, Nov 3, 2017, at 05:47, Craig Topper via llvm-dev wrote:
> That's a very good point about the ordering of the command line options.
> gcc's current implementation treats -mprefer-avx256 has "prefer 256 over
> 512" and -mprefer-avx128 as "prefer 128 over 256". Which feels weird for
> other reasons, but has less of an ordering ambiguity.
>
>
2005 Nov 12
1
how to make automatically each level from data.frame to vector
Dear R-helpers,
Suppose I have dataset like this below:
data(HairEyeColor)
dfHEC <- as.data.frame(as.table(HairEyeColor))
my.dfHEC <- data.frame(Hair=rep(dfHEC$Hair,dfHEC$Freq),
Eye=rep(dfHEC$Eye,dfHEC$Freq),
Sex=rep(dfHEC$Sex,dfHEC$Freq))
my.dfHEC
my.dfHEC$Hair
my.dfHEC$Eye
my.dfHEC$Sex
and I know all levels for Hair, Eye and Sex.
In my case, I
2004 Oct 20
2
[LLVMdev] Re: LLVM Compiler Infrastructure Tutorial
Vikram,
I also agree with you. I understand that target-independent representation is very valuable
and important for software compilation.
However, when we are doing high-level synthesis (also called behavioral/architectural synthesis),
the targeting architecture is also changing. That is, we need to do architecture exploration
and the IR transfromation simultaneously. For example,
2012 Oct 26
0
[LLVMdev] Data sharing between two ALUs and avoiding illegal copies
Hi,
I'm working on support for the latest generation of AMD GPUs (Southern
Islands) in the R600 backend, and I need some advice on how to handle
interactions between two different ALUs.
The processors on Southern Islands GPUs are grouped into compute units,
which contain 1 Scalar ALU (sALU) and 64 Vector ALUs (vALU). The sALU
is mainly responsible for flow control (implemented using
2017 Nov 09
2
RFC: [X86] Introducing command line options to prefer narrower vector instructions even when wider instructions are available
I agree that a less x86 specific command line makes sense. I've been having
an internal discussions with gcc folks and their evaluating switching to
something like -mprefer-vector-width=128/256/512/none
Based on the current performance data we're seeing, we think we need to
ultimately default skylake-avx512 to -mprefer-vector-width=256. If we go
with a target independent
2017 Nov 11
2
RFC: [X86] Introducing command line options to prefer narrower vector instructions even when wider instructions are available
Are you referring to the X86TargetLowering::isFsqrtCheap hook?
~Craig
On Fri, Nov 10, 2017 at 7:39 AM, Sanjay Patel <spatel at rotateright.com>
wrote:
> We can tie a user preference / override to a CPU model. We do something
> like that for square root estimates already (although it does use a
> SubtargetFeature currently for x86; ideally, we'd key that off of something
>
2002 Aug 14
0
automake 1.6 compatability patch
This patch cleans up the vorbis-tools Makefile.am files so they work with both
automake 1.4 and 1.6. Some changes to configure.in were also needed in order
to get things to work (and to fix some ac 2.50 issues).
Please remove config.h from cvs as it is a generated file and empty anyway.
automake 1.6 isn't really incompatable with 1.4, it's just more picky about
you sticking to the rules:
2006 Apr 21
2
Major internal changes, TI DSP build change
> The C5x and C6x output diverges in build 10143, which has log message "lpc
> floor converted to fixed-point." Also, the measured SNR changed from 11.05
> in builds 9854-10141 to 9.22 and 9.24 in 10143.
Actually, build 10143 introduced another bug, that was the reason for
the 1.1.11.1 release.
> There is just four lines in modes.c which declare the constant, and one
2000 Jun 19
2
Compilation error
Hi,
The latest CVS version which I just checked out doesn't compile...
(Linux 2.2.14)
% make
make[1]: Entering directory /var/.scratch/cvs/vorbis/lib'
make target CFLAGS="-O20 -ffast-math -D_REENTRANT -D__NO_MATH_INLINES
-fsigned-char -I. -I../include "
make[2]: Entering directory /var/.scratch/cvs/vorbis/lib'
gcc -O20 -ffast-math -D_REENTRANT -D__NO_MATH_INLINES
2017 Nov 12
2
RFC: [X86] Introducing command line options to prefer narrower vector instructions even when wider instructions are available
If skylake is that bad at AVX2 it belongs in -mcpu / -march IMO. Most
people will build for the standard x86_64-pc-linux or whatever anyway, and
completely ignore the change. This will mainly affect those who build their
own software and optimize for their system, and lots there have probably
caught on to this already. I always thought that's what -march was made
for, really.
GNOMETOYS
2003 Nov 25
1
ogginfo: playlength display in milliseconds
Hello
Some time ago I posted a lil' patch to this list which adds milliseconds display of
playlength to ogginfo. Some folks replied that it's plausible and this patch will be
merged to the next version. Vorbistools-1.0.1 got out and the patch is not in it. Why?
Anyway, here's this patch for vorbistools-1.0.1. I hope this time you will include it,
because milliseconds support is
2006 Sep 09
2
request to have dovecot authenticator driver 'officially' included/supported
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
hi all,
per the exim docs @:
http://exim.org/exim-html-4.62/doc/html/spec_html/ch36.html
a cyrus_sasl authenticator driveer is 'included' in exim core.
given that Dovecot has become a very attractive alternative for an
increasing number of folks, and there's a patch against exim 4.43 here: