Author: Gerd Isenberg
Date: 23:59:44 05/13/04
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On May 14, 2004 at 02:07:36, Gabor Szots wrote: >There are programs (e.g. Crafty versions compiled by Slate) which support SSE. >What is this? And what are the conditions to make use of it? > >Gábor SSE = SIMD streaming extensions SIMD = Single Instruction Multiple Data similar to MMX, SSE (SSE2, SSE3) instructions works on an additional register file of eight (P4) or 16 (AMD64) 128-bit xmm-registers. There are three vectorized packed data types and appropriate instructions. Float (4*32), double (2*64) and int (16*bytes, 8*shorts, 4*32-bit ints or 2*64 bit int). Under windows for AMD64 x87 float arithmetic is replaced by SSE. There are intrinsic functions in MSC to use SSE2 integer instructions with these xmm-registers, e.g. for pairs of bitboards. Gerd
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