C2000 C/C++ CODE GENERATION TOOLS
Release Notes
6.0.2
September 2011

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                             Table of Contents
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1.  Defect History
2.  Compiler Documentation Errata
3.  Development Tools Forum
4.  Defect Tracking Database
5.  New Features in 6.0.1
    5.1. Assembler Support for VCU 
    5.2. Link-time Optimization
6.  Note on Release History

==============================================================================
1. Defect History
==============================================================================

The list of defects fixed in this release as well as known issues can
be found in the file DefectHistory.txt.

==============================================================================
2. Compiler Documentation Errata
==============================================================================

Errata from the "TMS320C28x Optimizing C/C++ Compiler User's Guide" and the
"TMS320C28x Assembly Language Tools User's Guide" is available online at the
Texas Instruments Embedded Processors CG Wiki:

http://tiexpressdsp.com/wiki/index.php?title=Category:CGT

under the 'Compiler Documentation Errata' link.

This Wiki has been established to assist developers in using TI Embedded
Processor Software and Tools.  Developers are encouraged to dig through all
the articles.  Registered users can update missing or incorrect information.

==============================================================================
3. Development Tools Forum
==============================================================================

For development tools support please see the Texas Instruments
engineer-to-engineer (E2E) Community and the Development Tools
Forum at:

http://e2e.ti.com/support/development_tools/default.aspx

==============================================================================
4. Defect Tracking Database
==============================================================================

Compiler defect reports can be tracked at the Development Tools bug
database, SDOWP. The log in page for SDOWP, as well as a link to create
an account with the defect tracking database is found at:

https://cqweb.ext.ti.com/pages/SDO-Web.html

A my.ti.com account is required to access this page.  To find an issue
in SDOWP, enter your bug id in the "Find Record ID" box once logged in.
To find tables of all compiler issues click the queries under the folder:

"Public Queries" -> "Development Tools" -> "TI C-C++ Compiler"

With your SDOWP account you can save your own queries in your
"Personal Queries" folder.

==============================================================================
5. New Features in 6.0.1
==============================================================================

------------------------------------------------------------------------------
5.1. Assembler Support for VCU 
------------------------------------------------------------------------------
The 6.0.1 assembler generates code for C28x devices with the
VCU coprocessor.  The coprocessor includes specialized instructions to
support complex number arithmetic operations, FFT calculation, CRC 
calculation, and efficient software implementation of the Viterbi decoder.  
Full compiler support is not available for the VCU module; only an assembler 
is available. The assembler should be invoked through the shell using: 

cl2000 -v28 --vcu_spport=vcu0

to assemble code for the VCU.  See the VCU Module Specification for more
details on instructions.

Some VCU instructions are pipelined, and the pipeline is unprotected. The 
user needs to insert NOPs to avoid conflicts. The assembler will report 
pipeline conflicts for VCU instructions.

There is no prescribed RTS to be used with the VCU. The regular small/large
model C28x libraries can be used, unless FPU32 object files are also getting
linked - in which case, the FPU32 libraries must be used. 

-------------------------------------------------------------------------------
5.2. Link-time Optimization
-------------------------------------------------------------------------------

Support for link-time optimization (LTO) has been enabled for C2000 in this
release. LTO is invoked by using the -o4 option. This optimization level
increases the scope of optimizations to that of the entire application.

To use LTO, you must first compile all your files with the -o4 option.
At compile time, this option will embed information about your source into
the object file, which can be used at link time to perform optimizations
across files.

At link-time the user should also specify the -o4 option, which will cause
the linker to perform optimizations across files.  If -o4 is not given at
link time, the optimizations performed will be similar to those of -o3.
The user should expect longer link times when using this option, due to the
additional optimization being performed.

-------------------------------------------------------------------------------
6. Note on Release History
-------------------------------------------------------------------------------

This release is numbered 6.0.1, but is actually the first production release
for version 6.0.  The beta versions of this release were made available in
Code Composer Studio, which uses a slightly different version management
scheme.  The v6.0.1 compiler will be available as an update to the beta
versions in CCS.