vliw architecture in dsp

Very long instruction word or VLIW refers to a processor architecture designed to take advantage of instruction level parallelism This type of processor architecture is intended to allow higher performance without the inherent complexity of some other approaches. 9416 /Length 11 0 R /H 73 Salient features • For Efficient performance of DSP Operations  Multiplier and Multiplier Accumulator  Modified Bus Structure and Memory Access Schemes  Multiple Access Memory  Very Long Instruction Word VLIW Architecture  Pipelining  Special Addressing Modes  On Chip Peripherals In parallel computing, the tasks are broken down into definite units. DSPs are fabricated on MOS integrated circuit chips. The next segment concentrates on real-life examples of VLIW implementations. vliw在通用处理器上的失败,却在dsp领域获得了成功。根本原因是dsp特殊的应用场景正好发挥了vliw结构的优势,避开了它的短处。由于数字信号处理领域的算法比较单一稳定,同时是运算密集型程序,并不需要通用场景下的实时控制。 /D [ 1 0 ] It 1.8GHz DSP architecture delivers 1,600 GOPS All three use the VelociTI architecture, a high-performance, advanced VLIW (very long instruction word) architecture 7 0 obj /Name /Im1 /Height 28 Department of ECE Laboratory for Computer Architecture SIMD Processors • Single Instruction Multiple Data • Exploit data parallelism as opposed to instruction parallelism in VLIW processors • A technique that has been added to general-purpose processors for DSP and multimedia processing > Intel’s MMX, Sun’s VIS, Motorola’s AltiVec %PDF-1.2 Abstractm The indirect very long instruction word (iVLIW) architecture and its implementation on the BOPS ManArray family of multiprocessor digital signal processors (DSP) provides a scalable alternative to the wide instruction busses usually required in a multiprocessor VLIW DSP. /Type /XObject TriMedia media processors by NXP (formerly Philips Semiconductors) 2. The TMS320C6x Series The TMS320C6000 digital signal processor platform is part of the TMS320 DSP family. An efficient motion-adaption de-interlacing technique on VLIW DSP architecture. << It is more difficult to program a parallel system than a single processor system, as the architecture of different parallel systems may vary, and the processes of multiple processors must be synchronized and coordinated. stream VLIW Introduction VLIW: Very Long Instruction Word (J.Fisher) multiple operations packed into one instruction each operation slot is for a fixed function constant operation latencies are specified architecture requires guarantee of: –parallelism within an instruction => no x­operation RAW check –no data use before data ready => no data interlocks The code is not modified, but only re-arranged to take advantage of DSP/VLIW architecture paral- 1 Introduction The exponentially increasing performance and general-ity of superscalar processors has lead many to believe that Super Harvard Architecture Single-Chip Computer (SHARC) DSP by Analog Devices 3. VLIW architectures can exploit instruction-level parallelism (ILP) in programs even if vector style data-level parallelism does not exist. By Joseph A. Fisher, Paolo Faraboschi, Cliff Young; Morgan Kaufmann, 2004, ISBN 1558607668. /BPC 1 VLIW Architecture - Basic Principles. Leveraging its advanced VLIW architecture, Texas Instruments Inc. has revamped its VelociTI platform to create a new 16-bit fixed-point DSP core known as the C64x. u 16-bit fixed-point VLIW DSP core from Lucent/Motorola u StarCore claims it's a scalable architecture lFirst VLIW machine to target low-power apps u More execution units (13) than 'C62xx (8), but fewer instructions can be issued per cycle lSix for SC140 vs eight for 'C62xx StarCore SC140 C6000 digital signal processor (DSP) family by Texas Instruments 4. Common DSP features • Harvard architecture • Dedicated single-cycle Multiply-Accumulate (MAC) instruction (hardware MAC units) • Single-Instruction Multiple Data (SIMD) Very Large Instruction Word (VLIW) architecture • Pipelining • Saturation arithmetic • Zero overhead looping • Hardware circular addressing • Cache • DMA Q q 326.25 0 0 54.75 149.25 600.75 cm 0.0471 0.0039 0.7137 rg BI Leveraging its advanced VLIW architecture, Texas Instruments Inc. has revamped its VelociTI platform to create a new 16-bit fixed-point DSP core known as the C64x. /Width 137 /BPC 1 Contact the company for licensing fees and arrangements. VLIW processors rely on software to identify the parallelism and assemble wide instruction packets. Such an irregular processor poses many challenges in the construction of its compiler. /IM true VLIW Tutorial Summary: The project is centered around a multi-part VLIW tutorial. << /Type /XObject However, still some special restrictions have to be obeyed in code generationfor VLIW DSPs. The major architectural features, the instruction set, the compiler, and the capabilities for digital signal processing and multimedia processing are given in detail. CEVA Inc. Recent digital signal processors (DSPs) show a homo-geneous VLIW-like data path architecture, which allows C compilers to generate efficient code. The Gen4 CEVA-XC unifies the principles of scalar and vector processing in a powerful architecture, enabling two-times 8-way VLIW and up to an unprecedented 14,000 bits of data level parallelism. Very long instruction word refers to instruction set architectures designed to exploit instruction level parallelism. �t�i_Ҍѵ Department of ECE Laboratory for Computer Architecture SIMD Processors • Single Instruction Multiple Data • Exploit data parallelism as opposed to instruction parallelism in VLIW processors • A technique that has been added to general-purpose processors for DSP and multimedia processing > Intel’s MMX, Sun’s VIS, Motorola’s AltiVec 2"�zϺ2��c�[Pi�x�^��18�`��'�`�y\���]Rl�aO��HU�n�O�ļ��/ó�������G�$���x���4Ѿ+'��{�o���2�~4 ��ǣowv����%���������C'c���Z���'�g���gˇV����+� '>;9�9ti���N-�i��A1S /ColorSpace 2 0 R VLIW Architecture. We talk about the differences between VLIW and superscalar processes in relation to hardware and software complexity.. /BitsPerComponent 8 /Height 140 1 1 1 rg 36 36 540 720 re f BT 563.25 42.75 TD 0 0 0 rg /F0 12 Tf 0 Tc 0 Tw (1) Tj -342 27.75 TD /F0 9.75 Tf 0.1138 Tc -0.0513 Tw (\251 1999 Berkeley Design Technology, Inc.) Tj 14.25 654.75 TD /F0 12 Tf -0.0637 Tc 0.3137 Tw (VLIW Architectures for DSP) Tj ET 1 1 1 rg 126 417.75 360 270 re f q 326.25 0 0 54.75 152.25 597.75 cm 0.502 0.502 0.502 rg BI VLIW, or Very Long Instruction Word, has multiple instructions combined together by compilers.These packed instructions can be logically independent. Fixed Point Devices TMS320C62x DSP generation TMS320C64x DSP generation Floating point devices TMS320C67x DSP generation. Commercial VLIW CPUs include: 1. ... DSP Processors (TI TMS320C6x ) Recent digital signal processors (DSPs) show a homo-geneous VLIW-like data path architecture, which allows C compilers to generate efficient code. 1 0 obj Intel implemented VLIW in the Intel i860, their first 64-bit microprocessor 3. stream A high- /Name /im1 ID ������������������������������������� ����������������������������������������� ������������������������������������������� ������������������������������������������� ��������������������������������������������� ?���������������������������������������������� ����������������������������������������������� ����������������������������������������������� ����������������������������������������������� ������������������������������������������������ ������������������������������������������������� ������������������������������������������������� ������������������������������������������������� �������������������������������������������������� ��������������������������������������������������� ��������������������������������������������������� ��������������������������������������������������� ��������������������������������������������������� ?���������������������������������������������������� ���������������������������������������������������� ����������������������������������������������������� ����������������������������������������������������� ����������������������������������������������������� ����������������������������������������������������� ����������������������������������������������������� ����������������������������������������������������� ����������������������������������������������������� ?������������������������������������������������������?�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������?������������������������������������������������������?����������������������������������������������������������������������������������������������������������� ����������������������������������������������������� ����������������������������������������������������� ����������������������������������������������������� ����������������������������������������������������� ����������������������������������������������������� ����������������������������������������������������� ���������������������������������������������������� ?���������������������������������������������������� ��������������������������������������������������� ��������������������������������������������������� ��������������������������������������������������� ��������������������������������������������������� ?�������������������������������������������������� ������������������������������������������������� ������������������������������������������������� ������������������������������������������������� ������������������������������������������������ ����������������������������������������������� ����������������������������������������������� ����������������������������������������������� ��������������������������������������������� ��������������������������������������������� ������������������������������������������� ����������������������������������������� ����������������������������������������� Programmable VLIW and SIMD Architectures for DSP and Multimedia Applications Deepu Talla Laboratory for Computer Architecture Department of Electrical and Computer Engineering The University of Texas at Austin deepu@ece.utexas.edu Abstract – Digital Signal Processing (DSP) and multimedia workloads are expected to be Digital signal processing (DSP) and multimedia applications are expected to be the dominant workloads on future computer systems. The pixel in the missing field is classified into static and moving area. EI VLIW Architecture - Basic Principles. In order to reduce the number of register file ports needed to provide data for multiple functional units The architecture of the LILY processor, a 300-MHz six-way VLIW DSP, has been presented. Very Long Instruction Word (VLIW) architecture in P-DSPs (programmable DSP) increases the number of instructions that are processed per cycle. It 1.8GHz DSP architecture delivers 1,600 GOPS These instructions execute in parallel (simultaneously) on multiple CPUs. It is a concatenation of several short instructions and requires multiple execution units running in parallel, to carry out the instructions in a single cycle. This design is intended to allow higher performance without the complexity inherent in some other designs. The ManArray pro- Very-Long Instruction Word (VLIW) architectures are a suitable alternative for exploiting instruction-level parallelism (ILP) in programs, that is, for executing more than one basic (primitive) instruction at a time. Q 0.75 w 1 J 1 j 0 0 0 RG 201.75 655.5 m 191.25 654.75 l 181.5 653.25 l 172.5 651 l 165 647.25 l 158.25 643.5 l 153.75 639 l 150 633.75 l 149.25 628.5 l 150 622.5 l 153.75 617.25 l 158.25 612.75 l 165 609 l 172.5 605.25 l 181.5 603 l 191.25 601.5 l 201.75 600.75 l 422.25 600.75 l 432.75 601.5 l 442.5 603 l 451.5 605.25 l 459 609 l 465.75 612.75 l 470.25 617.25 l 474 622.5 l 474.75 628.5 l 474 633.75 l 470.25 639 l 465.75 643.5 l 459 647.25 l 451.5 651 l 442.5 653.25 l 432.75 654.75 l 422.25 655.5 l 201.75 655.5 l S BT 227.25 426.75 TD 0.3686 0.3412 0.3059 rg /F1 6.75 Tf 0.1097 Tc 0.1388 Tw (Copyright \251 1999 Berkeley Design Technology, Inc.) Tj 246.75 -6 TD 0.502 0.502 0.502 rg -0.003 Tc 0 Tw (1) Tj ET 437.25 432.75 28.5 21 re f q 28.5 0 0 -21 434.25 456.75 cm /im1 Do endstream %���� A compiler based on Open64 was developed for this architecture. Each unit is further divided into sets of instructions. u 16-bit fixed-point VLIW DSP core from Lucent/Motorola u StarCore claims it's a scalable architecture l First VLIW machine to target low-power apps u More execution units (13) than 'C62xx (8), but fewer instructions can be issued per cycle l Six for SC140 vs eight for 'C62xx The Parallel Architecture Core (PAC) is a new VLIW DSP architecture, featuring a two cluster design, and partitioned, distributed register files with restricted access ports. %���� Very-Long Instruction Word (VLIW) Computer Architecture ABSTRACT VLIW architectures are distinct from traditional RISC and CISC architectures implemented in current mass-market microprocessors. ��`$ �S���>yw��B������L-,1>�W&V���� VLIW processors. 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