vliw architecture in dsp

Super Harvard Architecture Single-Chip Computer (SHARC) DSP by Analog Devices 3. >> %�� stream Whereas conventional central processing units mostly allow programs to specify instructions to execute in sequence only, a VLIW processor allows programs to explicitly specify instructions to execute in parallel. The work is re-targetable and takes as input minimal generalized chip and assembly language syntax description and unoptimized assembly code and produces optimized assembly code, based on the chip description. VLIW is used extensively in the embedded chip market 2. Very-Long Instruction Word (VLIW) Computer Architecture ABSTRACT VLIW architectures are distinct from traditional RISC and CISC architectures implemented in current mass-market microprocessors. 1 Introduction The exponentially increasing performance and general-ity of superscalar processors has lead many to believe that grained parallelism of DSP applications is the very long instruction word (VLIW) architecture. The TMS320C6701 (C6701) device is based on the high-performance, advanced VelociTI very-long-instruction-word (VLIW) architecture developed by Texas Instruments (TI), making this DSP an excellent choice for multichannel and multifunction applications. 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 ... DSP Processors (TI TMS320C6x ) %�� VLIW Architecture. Technology is removing the gap between embedded and VLIW computing: high-performance methods that seemed too costly for embedded use have become feasible … CEVA Inc. Each unit is further divided into sets of instructions. >> /W 435 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 A digital signal processor (DSP) is a specialized microprocessor chip, with its architecture optimized for the operational needs of digital signal processing. VLIW processors. /Height 28 This design is intended to allow higher performance without the complexity inherent in some other designs. However, still some special restrictions have to be obeyed in code generationfor VLIW DSPs. /Height 140 1 0 obj However, still some special restrictions have to be obeyed in code generationfor VLIW DSPs. 10 0 obj 1 Introduction The exponentially increasing performance and general-ity of superscalar processors has lead many to believe that �t�i_Ҍѵ 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 ��+%dm�O��q׋�{']�U�TQ�^��fT""��`l�>�y��y��'��qW�� lѾ�>��}��tv��A� |��7D��$v�N�xzE'X�җ_�>�!��N ��$ž4v L��%"y��H��\�w�=,�0��E��bc�&��}.ټ� �@P��Yi��z!v�'E�/��1�=$��-�'� ��GG1p!��*�kd�ѷ�q�?ܯD �U��nq�r82b�ite� `��9?��1! • change in the instruction set architecture, i.e., 1 program counter points to 1 bundle (not 1 operation) • want operations in a bundle to issue in parallel • fixed format so could decode operations in parallel • enough FUs for types of operations that can issue in parallel • pipelined FUs Autumn 2006 CSE P548 - VLIW 2 VLIW Processors The C6713B device is based on the high-performance, advanced very-long-instruction-word (VLIW) architecture developed by Texas Instruments (TI), making this DSP an excellent choice for multichannel and multifunction applications. VLIW Architecture - Basic Principles. Intel implemented VLIW in the Intel i860, their first 64-bit microprocessor 3. 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 C6000 digital signal processor (DSP) family by Texas Instruments 4. 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 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. VLIW Tutorial Summary: The project is centered around a multi-part VLIW tutorial. SAN JOSE, Calif. — Analog Devices, Lucent Technologies and Motorola Inc. have joined Texas Instruments Inc. in promoting a "post-VLIW" approach to digital signal processing that will nudge users into a brave new world of compilers and C-languag Multi-ported memory , VLIW architecture, Pipelining , Special Addressing modes in P- DSPs , On chip Peripherals, Computational accuracy in DSP processor, Von Neumann and Harvard Architecture, MAC UNIT 2 : ARCHITECTURE OF TMS320C5X (08) 8 0 obj 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 Very long instruction word (VLIW) describes a computer processing architecture in which a language compiler or pre-processor breaks program instruction down into basic operations that can be performed by the processor in parallel (that is, at the same time). 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 VLIW architectures can exploit instruction-level parallelism (ILP) in programs even if vector style data-level parallelism does not exist. stream /ColorSpace 2 0 R Contact the company for licensing fees and arrangements. The TMS320C6x Series The TMS320C6000 digital signal processor platform is part of the TMS320 DSP family. /W 435 Very long instruction word refers to instruction set architectures designed to exploit instruction level parallelism. The ManArray pro- A compiler based on Open64 was developed for this architecture. %PDF-1.2 VLIW PROCESSORS:A METHOD TO EXPLOIT INSTRUCTION LEVEL PARALLELISM • A VLIW processor is based on an architecture that implements Instruction Level Parallelism (ILP) means execution of multiple instructions at the same time. Very Long Instruction Word (VLIW) Architectures 55:132/22C:160 High Performance Computer Architecture ... Statically scheduled ILP architecture. A high- VLIW processors. ID �� ?�� ?�� ?��?��?��?�� ?�� ?�� VLIW Architecture - Basic Principles. 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 Parallel Architecture Core (PAC) is a new VLIW DSP architecture, featuring a two cluster design, and partitioned, distributed register ﬁles with restricted access ports. /Type /XObject This paper presents an efficient motion-adaptive deinterlacing method based on edge-based liner average (ELA) and temporal adaptive interpolation. 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. /Length 13843 /Length 8 0 R 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. 7 0 obj H�\W�o��O��JW(��; ��uF�F� 7 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. endobj Digital signal processing (DSP) and multimedia applications are expected to be the dominant workloads on future computer systems. /D [ 1 0 ] These instructions execute in parallel (simultaneously) on multiple CPUs. Even after manual optimization of the VLIW code and insertion of SIMD and DSP instructions, the single-issue VIRAM processor is 60% faster than 5-way to 8-way VLIW designs. In order to reduce the number of register ﬁle ports needed to provide data for multiple functional units The C6713B device is based on the high-performance, advanced very-long-instruction-word (VLIW) architecture developed by Texas Instruments (TI), making this DSP an excellent choice for multichannel and multifunction applications. Recent digital signal processors (DSPs) show a homo-geneous VLIW-like data path architecture, which allows C compilers to generate efﬁcient code. We talk about the differences between VLIW and superscalar processes in relation to hardware and software complexity.. ID �� ?�� ?�� ?��?��?��?�� ?�� ?�� The pixel in the missing field is classified into static and moving area. Even after manual optimization of the VLIW code and insertion of SIMD and DSP instructions, the single-issue VIRAM processor is 60% faster than 5-way to 8-way VLIW designs. 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 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。 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. An efficient motion-adaption de-interlacing technique on VLIW DSP architecture. 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 Multi-ported memory , VLIW architecture, Pipelining , Special Addressing modes in P- DSPs , On chip Peripherals, Computational accuracy in DSP processor, Von Neumann and Harvard Architecture, MAC UNIT 2 : ARCHITECTURE OF TMS320C5X (08) In this paper, we evaluate the performance of a very long instruction word (VLIW) processor using Texas Instruments Inc.’s TMS320C6x and a single-instruction multiple-data (SIMD) processor using Intel’s Pentium II processor (with MMX) on a set of benchmarks. /BitsPerComponent 8 >> Commercial VLIW CPUs include: 1. ,�v� .>?��K�x]F 1�U"˂h��8O�. 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. The VLIW approach additionally enables designers to craft unique instructions and tailor the DSP core to their system needs. • change in the instruction set architecture, i.e., 1 program counter points to 1 bundle (not 1 operation) • want operations in a bundle to issue in parallel • fixed format so could decode operations in parallel • enough FUs for types of operations that can issue in parallel • pipelined FUs Autumn 2006 CSE P548 - VLIW 2 VLIW Processors 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4� 4�c��ә��|��0Z� 4� 4� 4� 4� 4�k��. The VLIW architecture is flexible in that additional functional units can be easily added when required for performance with little impact on the compiler. %PDF-1.2 EI Recent digital signal processors (DSPs) show a homo-geneous VLIW-like data path architecture, which allows C compilers to generate efﬁcient code. 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. /Width 38 It 1.8GHz DSP architecture delivers 1,600 GOPS /BPC 1 All three use the VelociTI architecture, a high-performance, advanced VLIW (very long instruction word) architecture /IM true endobj First, we explain the background and history behind VLIW and its difficulty of implementation. << 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 /BitsPerComponent 8 /H 73 VLIW processors rely on software to identify the parallelism and assemble wide instruction packets. /Type /XObject 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 The major architectural features, the instruction set, the compiler, and the capabilities for digital signal processing and multimedia processing are given in detail. /H 73 << DSPs are fabricated on MOS integrated circuit chips. In parallel computing, the tasks are broken down into definite units. /Width 137 By Joseph A. Fisher, Paolo Faraboschi, Cliff Young; Morgan Kaufmann, 2004, ISBN 1558607668. /Filter /FlateDecode 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 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. /BPC 1 /Length 11 0 R /IM true ��`$ �S��>yw��B��L-,1>�W&V�� 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. << /ColorSpace /DeviceRGB EI /Subtype /Image Very Long Instruction Word (VLIW) architecture in P-DSPs (programmable DSP) increases the number of instructions that are processed per cycle. The TMS320C67x DSPs are the floating-point DSP family in the TMS320C6000™ DSP platform. It 1.8GHz DSP architecture delivers 1,600 GOPS /Name /im1 TriMedia media processors by NXP (formerly Philips Semiconductors) 2. stream Q q 326.25 0 0 54.75 149.25 600.75 cm 0.0471 0.0039 0.7137 rg BI VLIW, or Very Long Instruction Word, has multiple instructions combined together by compilers.These packed instructions can be logically independent. /Subtype /Image The code is not modified, but only re-arranged to take advantage of DSP/VLIW architecture paral- 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. 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 Figure 2.3 shows the VLIW model architecture … 9416 /D [ 1 0 ] /Name /Im1 Such an irregular processor poses many challenges in the construction of its compiler. The next segment concentrates on real-life examples of VLIW implementations. 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. VLIW has found commercial use as follows: 1. Fixed Point Devices TMS320C62x DSP generation TMS320C64x DSP generation Floating point devices TMS320C67x DSP generation. (VLIW) processors. 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