Retired Document
Important: This sample code may not represent best practices for current development. The project may use deprecated symbols and illustrate technologies and techniques that are no longer recommended.
Test64BitMultiprec
Last Revision: | Version 1.0, 2006-06-09 Implements (PPC) A*Y+B where A & B are arrays of 64-bit words and Y is a 64-bit integer |
Build Requirements: | Xcode 2.x or GCC 3.0 (makefile included) |
Runtime Requirements: | Mac OS X |
The samples in this project are explained by "Special applications of 64-bit arithetic: Acceleration on the Apple G5." (enclosed as: 64bit_multiprec.pdf). addmul3asm.S, addmul4asm.S are two different 64-bit PowerPC G5 implementations of the operation A*Y+B, where A and B are arrays of 64-bit words and Y is a 64-bit integer. These routines are described in more detail in the paper. addmulv2.c illustrates using vecLib as a straightforward alternative to the 64-bit optimized multi-precision multiplication routine described in the paper. modmul64asm_2.S is a 64-bit routine to compute A*B (mod C) where A, B, and C are 64-bit quantities and a reciprocal for C has been precomputed.
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