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Introduction to CBEA SDK Veselin Dikov 1. Getting started - PDF document

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Moscow-Bavarian Joint Advanced Student School 19-29 March 2006, Moscow, Russia Introduction to CBEA SDK Veselin Dikov 1. Getting started Executable format check utility: # file <executable> Makefile headers (reside in SDK root

  1. Moscow-Bavarian Joint Advanced Student School 19-29 March 2006, Moscow, Russia Introduction to CBEA SDK Veselin Dikov 1. Getting started Executable format check utility: # file <executable> Makefile headers (reside in SDK root directory) make.header make.footer make.env Makefile examples # Makefile - ppu # Makefile - spu # # # Subdirecto ries ############### # Target ################## ##### DIRS := spu PROGRAMS_spu := simple_spu # created embedded library # Target ############ ########### LIBRARY_embed:= lib_simple_spu.a PROGRAM_ppu:= simple # Local Defines # Local Defines ################ ############################### # IMPORTS = $(SDKLIB_spu)/libc.a IMPORTS := spu/lib_simple_spu.a \ -lspe # make.footer # imports the embedded simple_spu ################################ include ../../make.footer # library allows consolidation of # spu program into ppe binary # make.footer is in the top of # make.footer ################## # the SDK include ../make.footer # make.footer is in the top of # the SDK 2. SPU Language Extensions The architecture’s extended instruction set is supported by the SPU Language extensions. 2.1. SIMD vectorization – vector data type 128 bit data structure. CBEA architecture has extended instruction set that operates on vector. Example: vector unsigned int vec = (vector unsigned int)(1,2,3,4); vector unsigned int v_ones = (vector unsigned int)(1); vector unsigned int vdest = spu_add(vec, v_ones); 1 of 4

  2. Moscow-Bavarian Joint Advanced Student School 19-29 March 2006, Moscow, Russia 2.2. Memory Flow Control (MFC) SPE units fetch data from main storage true DMA channels Example: mfc_get(&data,addr+16384*i,16384,20,0,0); LS address EA address 3. SPE library Provides PPE functionality; two sets of functions – thread management and MFC access functions Header: <libspe.h> 3.1. Thread management Functions for creating and managing thread groups and threads, functions for accessing SPE thread attributes and communicating with the thread. 3.2. MFC mailboxes Function for exchanging of messages and signals between PPE and SPE threads through DMA channels. 4. SDK libraries Library name Short Description PPE SPE C Library standard C99 functionality. POSIX.1 functions. x x Audio Resample audio resampling functionality for PPE and SPE x x Library Curves and quadratic and cubic Bezier curves. Biquadric and bicubic Bezier x x Surfaces Library surfaces, and curved point-normal triangles. FFT Library 1-D FFT and kernel functions for 2-D FFT x x Game Math Library math routines applicable to game performance needs x x Image Library routines for processing images - convolutions and histograms x x Large Matrix Library basic linear algebra routines on large vectors and matrices x 2 of 4

  3. Moscow-Bavarian Joint Advanced Student School 19-29 March 2006, Moscow, Russia Math Library general purpose math routines tuned to exploit SIMD x x Matrix Library routines for operations on 4x4 Matrices and quaternions x x Misc Library set of general purpose routines that don’t logically fit within any x x other Multi-Precision operations on unsigned integer numbers with large number of bits x Math Library Noise LibraryPPE 1-,2-, 3-, 4-D noise, Lattice and non-lattice noise, Turbulance x x Oscillator Libraries definition of sound sources x x Simulation Library functionality related to the Full-Simulator - - Sync Library synchronization primitives, like atomic operations, mutex x x Vector Library a set of general purpose routines that operate on vectors. x x 5. Remote Procedure Calls (RPC) Communication between PPE and SPE threads via function stubs Enables the implementation of Function-Offload Model, where: • SPE threads work as services – provide some functionality via IDL interfaces • PPE communicates with them thought RPC calls Interface Description Language (IDL) is an industry standard for definition of RPC interfaces: idl files interface add { import "../stub.h"; const int ARRAY_SIZE = 1000; [sync] idl_id_t do_inv ([in] int array_size, [in, size_is(array_size)] int array_a[], [out, size_is(array_size)] int array_res[]); … } 3 of 4

  4. Moscow-Bavarian Joint Advanced Student School 19-29 March 2006, Moscow, Russia idl compiler # idl -p ppe_sample.c -s spe_sample.c sample.idl IDL “mechanism”: 6. References • CBEA-Tutorial.pdf, SDK documentation • idl.pdf, SDK documentation • libraries_SDK.pdf, SDK Documentation • libspe_v1.0.pdf, SDK Documentation • SPU_language_extensions_v21.pdf, Sony online resources http://cell.scei.co.jp/pdf/SPU_language_extensions_v21.pdf, 15.03.2006 4 of 4

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