• Join
  • Sign In with my.TI Login
Texas Instruments
  • Products
  • Applications
  • Tools & Software
  • Support & Community
  • Sample & Buy
  • About TI
Sample & Purchase Cart Sample & Purchase Cart
  • Search
  • Advanced
TI E2E™ Community
  • Support Forums
  • Blogs
  • Groups
  • Videos
  • 简体中文
  • More ...
TI Home » TI E2E Community » Support Forums » Digital Signal Processors (DSP) » C6000 Multicore DSP » Keystone Multicore Forum (C66, 66A, AM5) » c6678's Multiplies number
Share
C6000 Multicore DSP
  • Forums
  • Announcements
Options
  • Subscribe via RSS
Training Available
TI provides self-paced online training that introduces the primary components of the KeyStone II family of SoC devices.

  • KeyStone II SoC Overview >
  • KeyStone II Software Overview >
  • KeyStone II ARM Cortex-A15 Corepac Overview >
  • More Information >
  • Check out
    Multicore Mix blog
    • $core_v2_blog.Current.Name

      Geeks UNITE for Geek Pride Day

      Posted 1 day ago
      by Lauren Reed1
      Happy Geek Pride Day from the Processors team! We wanted to celebrate...
    • $core_v2_blog.Current.Name

      OpenMP - All aboard!

      Posted 3 days ago
      by Debbie Greenstreet
      With so many end products today relying on multicore DSPs for...
    • $core_v2_blog.Current.Name

      A look back: Two years of Multicore Mix

      Posted 4 days ago
      by Lauren Reed1
      A big thank you to everyone who participated in our contest last...

    Forums

    c6678's Multiplies number

    This question is answered
    Suetake Masayuki
    Posted by Suetake Masayuki
    on Apr 09 2012 00:26 AM
    Prodigy40 points

    Hi,

    Now I am developing Correlator for software GPS on c6678 EVM. And I have a question.

    What kind of assembler code do write to realize 32(16x16) multiplies?

    I understand 8 multiplies, sample as follow

     DMPY2 .M1  A1:A0, A3:A2, A7:A6:A5:A4

    || DMPY2 .M2  B1:B0,B3:B2,B7:B6: B5:B4

    Do I need to study special coding method?

    in Instruction Set Reference-

    1.1.1 4x Multiply

     core can now execute up to 32 (16x16-bit) multiplies per cycle.

    C6678EVM C6778
    Report Abuse
    • Reply
    You have posted to a forum that requires a moderator to approve posts before they are publicly available.
    All Replies
    • Alberto Chessa
      Posted by Alberto Chessa
      on Apr 16 2012 04:27 AM
      Verified Answer
      Verified by Suetake Masayuki
      Genius3740 points

      Hi,

      I suppose it can do that only with complex,, that is DCMPY execute 2 complex mul that correspond to 8 16x16 mul.

      In para. 1.1.4, table 1.1, "Vector Size" = "4x16bits", while "Fixed point 16x16 MACs per cycle" = 32 is about some other operation,such as complex and compex matrix multiplication.

      Report Abuse
      • Reply
      You have posted to a forum that requires a moderator to approve posts before they are publicly available.
    • Allen Lee
      Posted by Allen Lee
      on Apr 16 2012 22:15 PM
      Verified Answer
      Verified by Suetake Masayuki
      Genius3500 points

      hi,

      There maybe a thread to reference:

      http://e2e.ti.com/support/dsp/c6000_multi-core_dsps/f/639/t/169810.aspx

      Allen

      Please press the "Verify Answer" button if you think the post is helpful to your question.Thanks.

      Report Abuse
      • Reply
      You have posted to a forum that requires a moderator to approve posts before they are publicly available.
    • Suetake Masayuki
      Posted by Suetake Masayuki
      on Apr 16 2012 23:09 PM
      Prodigy40 points

      Hi, Allen.

      Thank you for your information.

      I will read a thread.

      Masayuki

      Report Abuse
      • Reply
      You have posted to a forum that requires a moderator to approve posts before they are publicly available.
    • Suetake Masayuki
      Posted by Suetake Masayuki
      on Apr 16 2012 23:13 PM
      Prodigy40 points

      Hi Alberto

      Thank you for your reply.

      Certainly, DCMPY instruction can execute 8(16x16) multiplies per cycle.

      I will reconfirm Instruction set.

      Masayuki

      Report Abuse
      • Reply
      You have posted to a forum that requires a moderator to approve posts before they are publicly available.
    • Suetake Masayuki
      Posted by Suetake Masayuki
      on Apr 17 2012 00:37 AM
      Prodigy40 points

      I solved this problem by using CMATMPY instruction. it can be excute 16 multiplies per cycle.

      I appreciate some advices.

      Masayuki

      Report Abuse
      • Reply
      You have posted to a forum that requires a moderator to approve posts before they are publicly available.
    TI E2E™ Community
    • Support Forums
    • Blogs
    • Videos
    • Groups
    • Site Support & Feedback
    • Settings
    TI E2E™ Community Groups
    • TI University Program
    • Make the Switch
    • Microcontroller Projects
    • Motor Drive & Control
    Other Communities
    • Deyisupport
    • Designsomething.org
    • beagleboard.org
    • TI on Element 14
    • TI on TechXchangeSM
    Other Technical & Support Resources
    • WEBENCH® Design Center
    • Product Information Centers
    • Technical Documents
    • TI Design Network
    • TI Technical Articles
    • TI Training

    All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with respect to these materials. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.

    Content on this site may contain or be subject to specific guidelines or limitations on use. All postings and use of the content on this site are subject to the Terms of Use of the site; third parties using this content agree to abide by any limitations or guidelines and to comply with the Terms of Use of this site. TI, its suppliers and providers of content reserve the right to make corrections, deletions, modifications, enhancements, improvements and other changes to the content and materials, its products, programs and services at any time or to move or discontinue any content, products, programs, or services without notice.

    Follow Us Texas Instruments on Facebook Texas Instruments on Twitter Texas Instruments on LinkedIn Texas Instruments on Google+
    TI Worldwide | Contact Us | my.TI Login | Site Map | Corporate Citizenship | mobile m.ti.com (Mobile Version)

    TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs and
    embedded processors, along with software, tools and the industry’s largest sales/support staff.

    © Copyright 1995-2013 Texas Instruments Incorporated. All rights reserved.
    Trademarks | Privacy Policy | Terms of Use