Interested to Buy Any Domain ? << Click Here >> for more details...
registers(0-15) ,where they are going be resides., does
that mean here is it resides whether real or virtual
memory? and why?
then why we are assign even registers(0 to 6) for FP
operations????
- 3 Answers
- 7278 Views
- I also Faced
- E-Mail Answers
Answer Posted / steve holton
Clarifications:
As noted, registers are part of the CPU, and --not-- part of
"memory".
There are 16 general purpose registers, which are numbered
0--15 (not 16 - that would be 17 registers!).
There are also other registers - control registers, PSW,
etc., that are used by the operating system, and "normal
mortals" are supposed to ignore...
Floating point registers are separate from the general
purpose registers. Not all floating point instructions
require even registers - if you use 128-bit ("extended
precision") floating point, you can use FPR registers
1,3,5,and 7-15 on ESA390 models that have the AFP registers
"installed".
| Is This Answer Correct ? | 3 Yes | 0 No |
Post New Answer View All Answers
how do you round the addition or subtraction of two numbers in assembler? what does the following code do? 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?
Explain about base register?
How do you round the addition or subtraction of two numbers in assembler?
What is maximum displacement?
In the house keeping section of an MVS assembly language program, like the one below STM R14,R12,12(R13) BASR R12,R0 USING *,R12,R11 LA R11,2048 LA R11,2048(R11,R12) .... .... 1. What if BASR R12,R0 IS NOT PRECEDE USING *,R12,R11? 2. USING (base address), REGISTER does USING directive says assembler to treat particular Register as a base register with the mentioned base address..in the above case * i.e current location counter..well if that is the case why we need BASR R12,R0 ? 3. What if I write like STM R14,R12,12(R13) BASR R12,R0 LA R11,2048 LA R11,2048(R11,R12) USING *,R12,R11 there is no address resolution being calculated in both LA statements so is it a right way to set Base register?..will there be any issues with Domain regarding R11 and R12?
How many maximum base registers we can have in a single program?
How are data passed from jcl parm to assembler program?
Why do we use "drop"?
What is icm instruction?
Explain how to initialize a register to 0000?
What is maximum displacement and how to cross this limit?
Explain about house keeping in assembler?
explain about maximum displacement and how to cross this limit?
What is need of start 0?
Explain the difference between various read and find statement?
