<< Chapter < Page Chapter >> Page >

Every instruction in the C6x can execute conditionally. There are five registers available for conditions (on the C67x processors): A1, A2, B0, B1, and B2. If blank, the instruction always executes. Conditions can take a form such as [A1] where the instruction will execute if A1 is not zero. This can be handy for making loops were the counter is put in a register like A1 and is counted down to zero. The condition is put on the branch instruction that branches back to the beginning of the loop.

Register files

Where are the numbers stored in the CPU? In the C6000, the numbers used in operations are stored in register. Because the registers are directly accessible though the data path of the CPU, accessing the registers is much faster than accessing data in the external memory.

The C6000 CPU has two register files (A and B). Each of these files consists of sixteen 32-bit registers (A0-A15 for file A and B0-B15 for file B). The general-purpose registers can be used for data, data address pointers, or condition registers. The following figure shows a block diagram of the C67x processors. This basic structure is similar to other processors in the C6000 family.

TMS320C67x DSP Block Diagram taken from SPRU733: TMS320C67x/C67x+ DSP CPU and Instruction Set Reference Guide

The general-purpose register files support data ranging in size from 16-bit data through 40-bit fixed-point. Values larger than 32 bits, such as 40-bit long quantities, are stored in register pairs. In a register pair, the 32 LSB's of data are placed in an even-numbered register and the remaining 8 MSB's in the next upper register (which is always an odd-numbered register). In assembly language syntax, a colon between two register names denotes the register pairs, and the odd-numbered register is specified first. For example, A1:A0 represents the register pair consisting of A0 and A1.

Let's for now focus on file A only. The registers in the register file A are named A0 to A15. Each register can store a 32-bit binary number. Then numbers such as a , x , prod and y above are stored in these registers. For example, register A0 stores a . For now, let's assume we interpret all 32-bit numbers stored in registers as unsigned integer. Therefore the range of values we can represent is 0 to 2 32 size 12{2 rSup { size 8{"32"} } } {} −1. Let's assume the numbers a , x , prod and y are in the registers A0, A1, A3, A4, respectively. Then the above assembly instructions can be written specifically:

MPY .M1 A0,A1,A3 ADD .L1 A4,A3,A4

The TI C6000 CPU has a load/store architecture. This means that all the numbers must be stored in the registers before being used as operands of the operations for instructions such as MPY and ADD . The numbers can be read from a memory location to a register (using, for example, LDW , LDB instructions) or a register can be loaded with a constant value. The content of a register can be stored to a memory location (using, for example, STW , STB instructions).

In addition to the general-purpose register files, the CPU has a separate register file for the control registers. The control registers are used to control various CPU functions such as addressing mode, interrupts, etc.

Questions & Answers

Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
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.
yes that's correct
I think
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
How we are making nano material?
what is a peer
What is meant by 'nano scale'?
What is STMs full form?
scanning tunneling microscope
how nano science is used for hydrophobicity
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
what is differents between GO and RGO?
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
analytical skills graphene is prepared to kill any type viruses .
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
The nanotechnology is as new science, to scale nanometric
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
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
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
sciencedirect big data base
Introduction about quantum dots in nanotechnology
Praveena Reply
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
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?