Chapter 2. Architecture and technical overview 107
XL C, XL C/C++, and XL Fortran features that are introduced to use the latest POWER7+
processor include the following items:
Vector unit and vector scalar extension (VSX) instruction set to efficiently manipulate
vector operations in your application
Vector functions within the Mathematical Acceleration Subsystem (MASS) libraries for
improved application performance
Built-in functions or intrinsics and directives for direct control of POWER instructions at the
application level
Architecture and tune compiler options to optimize and tune your applications
COBOL for AIX enables you to selectively target code generation of your programs to
either exploit POWER7+ systems architecture or to be balanced among all supported
POWER systems. The performance of COBOL for AIX applications is improved by means
of an enhanced back-end optimizer. With the back-end optimizer, a component common also
to the IBM XL compilers, your applications can use the most recent industry-leading
optimization technology.
The performance of PL/I for AIX applications is improved through both front-end changes and
back-end optimizer enhancements. With the back-end optimizer, a component common also
to the IBM XL compilers, your applications can use the most recent industry-leading
optimization technology. For PL/I, it produces code that is intended to perform well across all
hardware levels, including POWER7+ of AIX.
IBM Rational® Development Studio for IBM i 7.1 provides programming languages for
creating modern business applications:
ILE RPG
ILE COBOL
C and C++ compilers
Heritage RPG and COBOL compilers
The latest release includes performance improvements and XML processing enhancements
for ILE RPG and ILE COBOL, improved COBOL portability with a COMP-5 data type, and
easier Unicode migration with relaxed USC2 rules in ILE RPG. Rational also released a
product named Rational Open Access: RPG Edition. This product opens the ILE RPG file I/O
processing, enabling partners, tool providers, and users to write custom I/O handlers that can
access other devices like databases, services, and web user interfaces.
IBM Rational Developer for Power Systems Software provides a rich set of integrated
development tools that support the XL C/C++ for AIX compiler, the XL C for AIX compiler, and
the COBOL for AIX compiler. Rational Developer for Power Systems Software offers
capabilities of file management, searching, editing, analysis, build, and debug, all integrated
into an Eclipse workbench. XL C/C++, XL C, and COBOL for AIX developers can boost
productivity by moving from older, text-based, command-line development tools to a rich set
of integrated development tools.
The IBM Rational Power Appliance solution provides a workload-optimized system and
integrated development environment for AIX development on IBM Power Systems. IBM
Rational Power Appliance includes a Power Express server preinstalled with a
comprehensive set of Rational development software along with the AIX operating system.
The Rational development software includes support for Collaborative Application Lifecycle
Management (C/ALM) through IBM Rational Team Concert™, a set of software development
tools from Rational Developer for Power Systems Software, and a choice between the XL
C/C++ for AIX or COBOL for AIX compilers.
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