Interested to Buy Any Domain ? << Click Here >> for more details...
Why do we use "drop"? What does "using" do?
- 4 Answers
- 11146 Views
- I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / mike m
USING tells the assembler what your base reg. will be at
that point in the code.
DROP says to stop using the register coded on the DROP
instruction
| Is This Answer Correct ? | 12 Yes | 2 No |
Answer / phil
neither DROP nor USING affect the register contents.
Once a register has been loaded with the address of a piece
of storage, the using statement can be used to 'map' that
storage against a set of labels defining the layout of that
storage e.g. a DSECT. Then whenever one of those labels is
referenced in the code, in moves etc, the assembler resolves
the relative address as a particular displacement from the
absolute address in the register. The DROP instruction
removes the relationship between the labels and the register
and renders subsequent references to those labels as
unresolvable, giving rise to errors at assembly (compile)time.
Typically the DROP instruction will be used to allow use of
the register for another purpose, e.g. address a different
bit of storage via a using staement on second DSECT without
the risk of corrupting that data via moves referencing the
original DSECT.
| Is This Answer Correct ? | 9 Yes | 0 No |
Answer / ajay kuriyal
to be more precise , using maps the register with the dsect
and drop unmapped or disolve the mapping of register with
the dsect
| Is This Answer Correct ? | 5 Yes | 1 No |
Answer / guest
Using is to map the addressablity for a table and drop used
to drop the addresability of a register. (to remove the
addressability)
| Is This Answer Correct ? | 1 Yes | 1 No |
What is house keeping in assembler? And explain the following code HELLOTSO START 0 * PRINT NOGEN BEGIN SAVE (14,12) LR 12,15 USING TYPE,12 ST 13,SAVE+4 LA 11,SAVE ST 11,8(13) LR 13,11
What is the difference between various read and find statement,and which one should be used when for better adabas performance ?
How to pass the parameters from jcl to assembler program?
explain about maximum displacement and how to cross this limit?
How to pass instream data in sysin with Assembler?
what is need of start 0? In steed of
How to initialize 20,000 bytes in the Assembler..
WHAT WILL HAPPEN IF WE DROP THE BASE REGISTER IN THE PGM WHICH CONTAINS ONLY ONE BASEREG?
how to produce SOC7 abend
How do you initialize a register to 0000?
change process tool( code changes from dev to prd) The changes made to your code should be effected in live. how the process takes place. that is how can you move the code changes from development to production.
Ap wkur,=p5 where wkur is a label?
COBOL 
