Mathematical Acceleration Subsystem

Libraries of high-performance mathematical functions

IBM® Mathematical Acceleration Subsystem (MASS) consists of libraries of mathematical functions tuned for optimum performance on a variety of IBM processors.

• Mathematical Acceleration Subsystem (MASS) consists of libraries of tuned mathematical functions, available in versions for the AIX® and Linux® platforms.
• MASS libraries offer improved performance over the standard mathematical library routines, are thread-safe and support compilations in C, C++, and Fortran applications.
• The MASS libraries are shipped with the XL C, XL C/C++, and XL Fortran compiler products, and are also available for separate download from this site.

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• Are thread safe.

• Are tuned specifically for optimum performance on the target architecture, offering improved performance over the corresponding standard system library routines.

• Are callable from C, C++, and Fortran applications.

• Are intended for applications where slight differences in accuracy or handling of exceptional values can be tolerated.

Features and benefits

Features	Details	Benefits
Scalar libraries	The MASS scalar libraries contain an accelerated set of frequently-used single- and double-precision math intrinsic functions.	Provide speedups up to 8x over the standard system library.
Vector libraries	The MASS vector libraries provide increased performance by operating on a vector of arguments. They include single-precision, double-precision, and integer functions.	Provide speedups up to over 35x compared to the standard system library.
SIMD libraries	The MASS Single Instruction Multiple Data (SIMD) libraries are provided for SIMD architectures. They operate on SIMD vector arguments, and include single-precision, double-precision, and integer functions.	Provide speedups up to 80% compared to the standard system library.
Compatible processors	POWER, POWER2, POWER3, POWER4, POWER5, POWER6, POWER7, Blue Gene/L, Blue Gene/P, Cell Broadband Engine (PPU and SPU).
Supported operating systems	AIX, Linux
32/64-bit mode support	32-bit mode applications are supported, as well as 64-bit mode applications on processors supporting them.

Operating System	Software	Hardware
AIX, Linux	Operating system at level suitable for your compiler software. C, C/C++, or Fortran compiler	IBM eServer(TM) system supported by MASS (see Compatible processors under Features and benefits), and capable of supporting your required operating system.