registers(0-15) ,where they are going be resides., does that mean here is it r

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????

Question Posted / sathish

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registers(0-15) ,where they are going be resides., does that mean here is it resides whether real ..

Answer / guest

Registers are part of the CPU logic and should not be
confused with memory real or virtual. The question is
about as sensical as asking where the uterus resides in a
man. Also, general purpose registers 0--16 are an
entirely different breed that the floating point
registers. As for the numbering, a decision made by the
manufacturer's design people.

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registers(0-15) ,where they are going be resides., does that mean here is it resides whether real ..

Answer / 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".

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registers(0-15) ,where they are going be resides., does that mean here is it resides whether real ..

Answer / sathish

please let me know??

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