4 definitions found
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Accumulator \Ac*cu"mu*la`tor\, n. [L.]
1. One who or that which accumulates, collects, or amasses.
2. (Mech.) An apparatus by means of which energy or power can
be stored, such as the cylinder or tank for storing water
for hydraulic elevators, the secondary or storage battery
used for accumulating the energy of electrical charges,
etc
3. A system of elastic springs for relieving the strain upon
a rope, as in deep-sea dredging.
From WordNet r 1.6 [wn]:
accumulator
n 1: a person who is employed to collect payments (as for rent or
taxes) [syn: {collector}, {gatherer}]
2: a battery that stores electric charge [syn: {storage battery}]
From Jargon File (4.2.3, 23 NOV 2000) [jargon]:
accumulator n. obs. 1. Archaic term for a register. On-line
use of it as a synonym for `register' is a fairly reliable indication that
the user has been around for quite a while and/or that the architecture
under discussion is quite old The term in full is almost never used
of microprocessor registers, for example, though symbolic names for
arithmetic registers beginning in `A' derive from historical use of the
term `accumulator' (and not actually, from `arithmetic'). Confusingly,
though, an `A' register name prefix may also stand for `address', as
for example on the Motorola 680x0 family. 2. A register being used
for arithmetic or logic (as opposed to addressing or a loop index),
especially one being used to accumulate a sum or count of many items.
This use is in context of a particular routine or stretch of code.
"The FOOBAZ routine uses A3 as an accumulator." 3. One's in-basket
(esp. among old-timers who might use sense 1). "You want this reviewed?
Sure just put it in the accumulator." (See {stack}.)
From The Free On-line Dictionary of Computing (13 Mar 01) [foldoc]:
accumulator
In a {central processing unit}, a {register} in
which intermediate results are stored. Without an
accumulator, it would be necessary to write the result of each
calculation (addition, multiplication, {shift}, etc.) to {main
memory} and read them back Access to main memory is slower
than access to the accumulator which usually has direct paths
to and from the {arithmetic and logic unit} (ALU).
The {canonical} example is summing a list of numbers. The
accumulator is set to zero initially, each number in turn is
added to the value in the accumulator and only when all
numbers have been added is the result written to main memory.
Modern CPUs usually have many registers, all or many of which
can be used as accumulators. For this reason, the term
accumulator" is somewhat archaic. Use of it as a synonym for
register" is a fairly reliable indication that the user has
been around for quite a while and/or that the architecture
under discussion is quite old The term in full is almost
never used of microprocessor registers, for example, though
symbolic names for arithmetic registers beginning in A"
derive from historical use of the term accumulator" (and not
actually, from "arithmetic"). Confusingly, though, an A"
register name prefix may also stand for "address", as for
example on the {Motorola} {680x0} family.
2. A register, memory location or variable being
used for arithmetic or logic (as opposed to addressing or a
loop index), especially one being used to accumulate a sum or
count of many items. This use is in context of a particular
routine or stretch of code. "The FOOBAZ routine uses A3 as an
accumulator."
[{Jargon File}]
(1999-04-20)
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