Editing Open64 (section)

== Versions ==
The original version of Open64 that was released in 2002 was missing its very advanced [[software pipelining]] code generator, and had only a rudimentary code generator for Itanium.  The entire original MIPSPro compiler, with this code generator, is available under a commercial license as the Blackbird compiler from Reservoir Labs.  The [http://portal.acm.org/citation.cfm?id=231385 Showdown Paper] documents the code generator that was not included in Open64.  The very advanced compiler from Tilera, for its 64-core TILE64 chip, is based on Blackbird.

Open64 exists in many [[fork (software development)|forks]], each of which has different features and limitations. The "classic" Open64 branch is the Open Research Compiler (ORC), which produces code only for the Itanium (IA-64), and was funded by [[Intel]]. The ORC effort ended in 2003, and the current official branch (which originated from the Intel ORC project) is managed by [[Hewlett-Packard]] and the [[University of Delaware]]'s Computer Architecture and Parallel Systems Laboratory (CAPSL).

Other important branches include the compilers from [[Tensilica]] and the [[AMD]] x86 Open64 Compiler Suite.<ref>{{ cite web | title = x86 Open64 Compiler Suite | publisher = [[AMD]] | url = http://developer.amd.com/tools-and-sdks/cpu-development/x86-open64-compiler-suite/ | access-date = 12 November 2013 | url-status = dead | archive-url = https://web.archive.org/web/20131113100944/http://developer.amd.com/tools-and-sdks/cpu-development/x86-open64-compiler-suite/ | archive-date = 13 November 2013 }}</ref>

[[Nvidia]] is also using an Open64 fork to optimize code in its [[CUDA]] toolchain.<ref>[http://www.capsl.udel.edu/conferences/open64/2008/Papers/101.doc NVIDIA’s Experience with Open64]</ref>

Open64 is used as the backend for the [[NonStop (server computers)|HPE NonStop OS]] compilers on the x86-64 platform.<ref>{{cite web|url=http://blog.ecubesystems.com/john-reagan-interview-on-llvm-part-2/|title=John Reagan Interview on LLVM, part 2|date=2019-05-01|access-date=2020-12-21|website=ecubesystems.com|archive-date=2020-11-25|archive-url=https://web.archive.org/web/20201125080221/http://blog.ecubesystems.com/john-reagan-interview-on-llvm-part-2/|url-status=dead}}</ref>

=== Open64 releases ===
{| class=wikitable
!Version !! Release date
|-
|5.0
|2011-11-11
|-
|4.2.4
|2011-04-12
|-
|4.2.3
|2010-04-09
|-
|4.2.1
|2008-12-08
|-
|4.2
|2008-10-01
|-
|4.1
|2007-12-03
|-
|4.0
|2007-06-15
|-
|3.1
|2007-04-13
|-
|3.0
|2006-11-22
|-
|2.0
|2006-10-02
|-
|1.0
|2006-09-22
|-
|0.16
|2003-07-07
|-
|0.15
|2002-11-30
|-
|0.14
|2002-03-04
|-
|0.13
|2002-01-10
|}

=== AMD x86 Open64 releases ===
{| class=wikitable
!Version !! Release date
|-
|4.5.2.1
|2013-03-28
|-
|4.5.2
|2012-08-08
|-
|4.5.1
|2011-12-19
|-
|4.2.4
|2010-06-29
|-
|4.2.3.2
|2010-05-17
|-
|4.2.3.1
|2010-01-29
|-
|4.2.3
|2009-12-11
|-
|4.2.2.3
|2009-11-23
|-
|4.2.2.2
|2009-08-31
|-
|4.2.2.1
|2009-06-03
|-
|4.2.2
|2009-04-24
|}