<< Chapter < Page Chapter >> Page >

Functional units

Where do the actual operations such as multiplication and addition take place? The C6000 CPU has several functional units that perform the actual operations. Each register file has 4 functional units named .M , .L , .S , and .D . The 4 functional units connected to the register file A are named .M1 , .L1 , .S1 , and .D1 . Those connected to the register file B are named .M2 , .L2 , .S2 , and .D2 . For example, the functional unit .M1 performs multiplication on the operands that are in register file A. When the CPU executes the MPY .M1 A0, A1, A3 above, the functional unit .M1 takes the value stored in A0 and A1 , multiply them together and stores the result to A3 . The .M1 in MPY .M1 A0, A1, A3 indicates that this operation is performed in the .M1 unit. The .M1 unit has a 16 bit multiplier and all the multiplications are performed by the .M1 (or .M2 ) unit. The following diagram shows the basic architecture of the C6000 family and functional units.

Functional Units of the 'C6x taken from SPRU198: TMS320C6000 Programmers' Guide

Similarly, the ADD operation can be executed by the .L1 unit. The .L1 can perform all the logical operations such as bitwise AND operation ( AND instruction) as well as basic addition ( ADD instruction) and subtraction ( SUB instruction).

Read the description of the ADD and MPY instructions in SPRU733 or similar document for the processor you are using. Write an assembly program that computes A0*(A1+A2)+A3 .

Typical assembly operations

Loading constants to registers

Quite often you need to load a register with a constant. The C6x instructions you can use for this task are MVK , MVKL , and MVKH . Each of these instructions can load a 16-bit constant to a register. The MVKL instruction loads the LOWER 16-bits and the MVKH instruction loads the HIGH 16-bits into the register. In order to load 32-bit values into a register, both instructions are needed.

(Loading constants): Write assembly instructions to do the following:

  1. Load the 16-bit constant 0xff12 to A1 .
  2. Load the 32-bit constant 0xabcd45ef to B0 .

Register moves, zeroing

Contents of one register can be copied to another register by using the MV instruction. There is also the ZERO instruction to set a register to zero.

Loading from memory to registers

Because the C6x processor has the so-called load/store architecture, you must first load up the content of memoryto a register to be able to manipulate it. The basic assembly instructions you use for loading are LDB , LDH , and LDW for loading up 8-, 16-, and 32-bit data from memory. (There are some variations to theseinstructions for different handling of the signs of the loaded values.)

However, to specify the address of the memory location to load from, you need to load up another register (used as anaddress index) and you can use various addressing modes to specify the memory locations in many different ways. The addressing mode is the method by which aninstruction calculates the location of an object in memory. The table below lists all the possible different ways tohandle the address pointers in the C6x CPU. Note the similarity with the C pointer manipulation.

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
Privacy Information Security Software Version 1.1a
Good
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply

Get the best Algebra and trigonometry course in your pocket!





Source:  OpenStax, Dsp lab with ti c6x dsp and c6713 dsk. OpenStax CNX. Feb 18, 2013 Download for free at http://cnx.org/content/col11264/1.6
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Dsp lab with ti c6x dsp and c6713 dsk' conversation and receive update notifications?

Ask