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<div class="moz-cite-prefix">On 03/01/2013 02:57 PM, Hal Finkel
wrote:<br>
</div>
Hi Hal,<br>
<br>
thanks for feedback.<br>
<blockquote
cite="mid:2014633.4356.1362121024221.JavaMail.hfinkel@sapling3"
type="cite">
<pre wrap="">
Jiong, I am happy to see the Tile backend being offered for upstream inclusion. Among other things, in the long run, this may help inform and motivate many-core capabilities in LLVM.
First, can you elaborate on the future maintenance and development plans for the target code? Do you plan to add SIMD support? Atomic memory operations?</pre>
</blockquote>
yes, currently we lack of old JIT support (I was thinking
MCJIT will be the future, but from the mailinglist archive, it seems
old JIT is still necessary), SIMD intrinsic support etc. all these
will be supported next.<br>
<br>
As some of the llvm modules are in active development, for
example MC Layer, we want to return code to community repository
first, so that it will be easy to keep pace with llvm main tree.<br>
<blockquote
cite="mid:2014633.4356.1362121024221.JavaMail.hfinkel@sapling3"
type="cite">
<pre wrap="">
Will you be able to setup a buildbot on this architecture? If so, can it be connected to the public system?</pre>
</blockquote>
yes, I guess it's OK to setup a tilegx buildbot with
connection to public system. I will confirm this with the company.<br>
<blockquote
cite="mid:2014633.4356.1362121024221.JavaMail.hfinkel@sapling3"
type="cite">
<pre wrap="">
On the patch itself:
1. There are still a few places where there is commented-out code or #if 0 blocks; these should be removed (or replaced with real comments as appropriate).</pre>
</blockquote>
thanks, I will fix these things.<br>
<blockquote
cite="mid:2014633.4356.1362121024221.JavaMail.hfinkel@sapling3"
type="cite">
<pre wrap="">
2. There are no regression tests -- using the test-suite is obviously useful, but targeted regression tests are essential.</pre>
</blockquote>
yes, regression tests will be added later.<br>
<blockquote
cite="mid:2014633.4356.1362121024221.JavaMail.hfinkel@sapling3"
type="cite">
<pre wrap="">
You say that there are unexpected failures in the regression tests and in the test suite. Do you understand these?</pre>
</blockquote>
yes, I have done investigation on these failures.<br>
<br>
regression (44 failures)<br>
===<br>
20: caused JITTests failures, we lack old jit support<br>
2: <br>
MCJIT/test-common-symbols-remote.ll<br>
MCJIT/test-fp-no-external-funcs-remote.ll<br>
<br>
the other 20 are mostly under Clang:: Tooling (these
testcases seems to be added in this week) & some debuginfo
testcases, I will clean up them later.<br>
<br>
<br>
test-suite (17 failures)<br>
======<br>
1 of them are compile stage failures<br>
===<br>
MultiSource/Benchmarks/tramp3d-v4/tramp3d-v4<br>
the reason is tilegx do not support some c99 float
rounding & exceptions<br>
we lack the support of some flag like FE_DIVBYZERO
etc, for fegetexceptflag.<br>
<br>
16 of them are runtime failures.<br>
===<br>
actually, I compare all these failures with our
gcc output, it's the same.<br>
nearly all of them are caused by float point
precision issue, for example,<br>
<br>
MultiSource/Applications/sqlite3/<br>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<pre id="comment_text_25" style="color: rgb(0, 0, 0); font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); "> ...
6|496148.333333333
-6|496234.333333333 <=== expected output & x86_64 result
+6|496234.333333334 <=== tilegx gcc/llvm result
8|496373.0
8|496448.375
1|496587.0
-6|496647.333333333
+6|496647.333333334
...
---
Regards,
Jiong
</pre>
<blockquote
cite="mid:2014633.4356.1362121024221.JavaMail.hfinkel@sapling3"
type="cite">
<pre wrap="">
-Hal
</pre>
<blockquote type="cite">
<pre wrap="">
TILE-Gx is a VLIW architecture with 64-bit registers, 64-bit address
space,
and 64-bit instructions. TILE-Gx has load-store architecture ISAs.
More information on the architectures is available at
<a class="moz-txt-link-freetext" href="http://www.tilera.com/scm/docs/index.html">http://www.tilera.com/scm/docs/index.html</a>.
the attached patches contains the following main features for tilegx
backend:
1. general function.
2. PIC/TLS/JumpTable.
3. Instructoin Bundling for VLIW.
4. Basic support for Asm Parser.
5. MC Layer (aware of VLIW), MCJIT support.
I've run the regression test and standalone test-suite natively on
TILE-Gx silicon. The
test results are:
regression
---
Expected Passes : 13218
Expected Failures : 78
Unsupported Tests : 68
Unexpected Failures: 44
test-suite
---
Expected Passes : 949
Unexpected Failures: 17
the llvm patch is against:
commit 5e812139690ce077d568ef6559992b2cf74eb536
Author: Evgeniy Stepanov <a class="moz-txt-link-rfc2396E" href="mailto:eugeni.stepanov@gmail.com"><eugeni.stepanov@gmail.com></a>
Date: Thu Feb 28 11:25:14 2013 +0000
[msan] Implement sanitize_memory attribute.
the clang patch is against:
commit a4d4621b206f941cc58d9d0bc7c67a8e705c9d49
Author: Daniel Jasper <a class="moz-txt-link-rfc2396E" href="mailto:djasper@google.com"><djasper@google.com></a>
Date: Thu Feb 28 11:05:57 2013 +0000
Improve formatting of #defines.
the test-suite patch is against:
commit 8c1ab3b660e67b74421d657408167b1345188f8d
Author: Duncan Sands <a class="moz-txt-link-rfc2396E" href="mailto:baldrick@free.fr"><baldrick@free.fr></a>
Date: Sun Feb 17 15:21:11 2013 +0000
Use LLVMCC_EMITIR_FLAG rather than -emit-llvm
please review, looking forward to your feedback.
thanks.
---
Regards,
Jiong
Tilera Corporation.
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</pre>
</blockquote>
</blockquote>
<br>
<br>
<pre class="moz-signature" cols="72">--
Regards,
Jiong. Wang
Tilera Corporation.</pre>
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