Changes between Version 39 and Version 40 of OpenCL_Memo


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Timestamp:
Dec 12, 2011 7:43:51 PM (13 years ago)
Author:
nakasato
Comment:

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  • OpenCL_Memo

    v39 v40  
    33In the section 6.7.2 (187 page) in the OpenCL Specification Version: 1.1 (Revision: 33), "__attribute__((vec_type_hint(<typen>))" is described. This hint controls the autovectorizer in the compiler for OpenCL C. I tested this feature by dumping the assembly code for a kernel targeted for AVX instructions with Intel SDK (version 1.5). 
    44 
    5 ||               || lines || performance || 
    6 || no hint       || 1567  || 23.1 sec    || 
    7 || with the hint || 333   || 43.0 sec    || 
     5||               || lines || 
     6|| no hint       || 1567  || 
     7|| with the hint || 333   || 
    88 
    9 This hint amazingly reduces the size of the generated kernel code. But... OK, a shorter code is not always a faster code. Still working... 
     9This hint amazingly reduces the size of the generated kernel code. 
     10Still working... 
    1011 
    1112== How to use "ioc" command equipped with Intel SDK. ==