Bitwidth Analysis with Application to Silicon Compilation
Name
MIT-LCS-TM-602.pdf
Size
1.3 MB
Format
Adobe PDF
Checksum (MD5)
28bab02373f46e0a0a00345f1dc787a9
Author(s)
Stephenson, Mark
Babb, Jonathan
Amarasinghe, Saman
Date Issued
November 1999
Series/Report no.
MIT-LCS-TM-602
Abstract
In this paper introduces Bitwise, a compiler that minimizes the bitwidth - the number of bits used to represent each operand - for both integers and pointers in a program. By propagating static information both forward and backward in the program dataflow graph, Bitwise frees in cases where the compiler can determine bitwidths automatically. We find a rich opportunity for bitwidth reductionin modern multimedia and streaming application workloads. For new architectures that support sub-word quantities, we expect that our bitwidth reductions will save power and increase processor performance.
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