QTIB: Quick bit-reversed permutations on CPUs

G. Knittel
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引用次数: 1

Abstract

We present a fast algorithm for out-of-place bit-reversed permutation of large vectors for input to an FFT. It is an extension of two previously published methods with special consideration of advanced CPU hardware features. In particular, the method makes heavy use of cache prefetching, MMX and SSE units, and write-combining buffers. Implementations have been made in assembly language for 2-byte and 4-byte operands. In terms of efficiency the method significantly outperforms previously reported methods.
QTIB: cpu上的快速位反转排列
我们提出了一种快速算法,用于FFT输入的大向量的位置反转排列。它是两个先前发布的方法的扩展,特别考虑了高级CPU硬件特性。特别是,该方法大量使用缓存预取、MMX和SSE单元以及写组合缓冲区。已经用汇编语言实现了2字节和4字节操作数。在效率方面,该方法明显优于以前报道的方法。
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