Best UK USA UAE Australia Canada China Single Assignment Languages Homework Help Service Online
A number of so-called single-assignment languages have been developed over the years, many designed for parallel scientiﬁc computing. Single-assignment conditions are also used in program optimization and in hardware description languages. Single-assignment conditions arise in hardware as only one assignment to each variable may occur per clock cycle.
One example of a single-assignment language is SISAL, which stands for streams and iteration in a single-assignment language. Another is SAC, or single- assignment C. Programs in single-assignment languages must satisfy the following condition:
During any run of the program, each variable may be assigned a value only once, within the scope of the variable.
The following program fragment satisﬁes this condition,
if (y>3) then x = 42+29/3 else x = 13.39;
because only one branch of the if-then-else will be executed on any run of the program. The program x=2; loop forever; x=3 also satisﬁes the condition because no execution will complete both assignments.
Single-assignment languages often have specialized loop constructs, as other- wise it would be impossible to execute an assignment inside a loop body that gets executed more than once. Here is one form, from SISAL:
for (range) (body)
returns (returns clause) end for
An example illustrating this form is the following loop, which computes the dot (or inner) product of two vectors
for i in 1, size
elt prod := x[i]∗y[i] returns value of sum elt prod end for
This loop is parallelizable because different products x[i]∗y[i] can be computed in parallel. A typical SISAL program has a sequential outer loop containing a set of parallel loops.
How it Works?
How it Works?
Step 1:- Want to buy solution for this. Please click on submit your assignment here and then fill all details and please mentioned product code at the end of the case. Product code is extremely important to locate your assignment. You can also mail us by keeping product code as mail subject to firstname.lastname@example.org
Step 2:- As soon as we received your details, we will inform you with through email about quotations of the given assignment. Requesting you to please mention your budget. Also ensure our email email@example.com should not go into your spam folder.
Step 3:- Once you agree with our price, click on pay now and pay the agreed amount and once we received the payment assignment will be delivered before agreed deadline.
Step 4:-You can also call us in our phone no. as given in the top of the home page or chat with our customer service representatives by clicking on chat now given in the bottom right corner.
Our Features for Assignment Help Services
Plagiarism Free Solution
The first and foremost things that we promise to our customer is plagiarism free solution i.e. a complete and unique solution as per customer’s university requirements.
Excellent Customer Care Services
You can feel our responsiveness once you use our service. Our team of excellent and dedicated customer service representatives are always ready to provide best customer care service 24X7 . Just drop a mail to firstname.lastname@example.org and you can receive response in just no time.
Multiple Stage Quality Assurance
We design a unique multiple stage quality assurance team to ensure plagiarism free, original, relevant and as per customer’s requirements. We not only give importance to accurate solutions or writing but also we give equal importance to references style too.
Privacy and Confidentiality
We believe in maintaining complete privacy and confidentiality of all our clients. None of the information furnished to us is shared with anyone else.
We receive requests from clients all over the World. Most of our customers are from USA, UK, Australia, Canada, UAE, Muscat, Oman, Qatar, UAE, New-Zealand, France Germany etc.
- Strategic management case study help
- Case Study Assignment Help
- Trade finance case study help
- Banking case study assignment help
- Banking case study homework help
- Meaning of case study assignment help
- Child development case study homework help
- Contract law case study homework Help
- Finance accounting case studies homework help
- Company Financial statement analysis case study homework help
- Foreign assignment case study help
- HR case study homework help
- Human resource management case study homework help
- Managerial accounting case study assignment help
- Managerial accounting case study homework help
- Negotiations case study homework help
- Organization behavior case study homework help
- Project management case study homework help
- Financial statement analysis assignment help
- HBS case study assignment help
- Ratio analysis case study assignment help
- Small business case study homework help
- Project finance case studies help
- Healthcare finance case studies homework help
- MBA case study homework help
- Financial analysis business case study homework help
- Harvard business case study homework help
- Business strategy case study homework help
- Business law case study homework help
- Accounting Case Study Help
- Business case study homework help
- Finance case study help
- Corporate Finance case study homework help
- Business process case study assignment help
- Business statistics case study assignment help
Suppose you have the job of building a parallelizing compiler for a single- assignment language. Assume that the programs you compile satisfy the single- assignment condition and do not contain any explicit process fork or other parallelizing instructions. Your implementation must ﬁnd parts of programs that can be safely executed in parallel, producing the same output values as if the program were executed sequentially on a single processor.
Assume for simplicity that every variable is assigned a value before the value of the variable is used an in expression. Also assume that there is no potential source of side effects in the language other than assignment.
(a) Explain how you might execute parts of the sample program
y = f(g(x),h(x));
if y==5 then z=g(x) else z=h(x);
in parallel. More speciﬁcally, assume that your implementation will schedule the following processes in some way:
process 1 – set x to 5 process 2 – call g(x) process 3 – call h(x)
process 4 – call f(g(x),h(x)) and set y to this value process 5 – test y==5
process 6 – call g(x) and then set z=g(x) process 7 – call h(x) and then set z=h(x)
For each process, list the processes that this process must wait for and list the processes that can be executed in parallel with it. For simplicity, assume that a call cannot be executed until the parameters have been evaluated and assume that processes 6 and 7 are not divided into smaller processes that execute the calls but do not assign to z. Assume that parameter passing in the example code is by value.
(b) If you further divide process 6 into two processes, one that calls g(x) and one that assigns to z, and similarly divide process 7 into two processes, can you execute the calls g(x) and h(x) in parallel? Could your compiler correctly eliminate these calls from processes 6 and 7? Explain brieﬂy.
(c) Would the parallel execution of processes you describe in parts (a) and (b), if any, be correct if the program does not satisfy the single-assignment condition? Explain brieﬂy.
(d) Is the single-assignment condition decidable? Speciﬁcally, given an program written in asubset of C, for concreteness, is it possible for acompiler to decide whether this program satisﬁes the single-assignment condition? Explain why or why not. If not, can you think of a decidable condition that implies the single- assignment condition and allows many useful single-assignment programs to be recognized?
(e) Suppose a single-assignment language has no side-effect operations other than assignment. Does this language pass the declarative language test? Explain why or why not.
Product Code: CSLC02
Looking for Single Assignment Languages Homework Help, please submit your details here with product code mentioned above.