Definitions for index register
in·dex reg·is·ter

Princeton's WordNetRate this definition:0.0 / 0 votes

1. index registernoun

   (computer science) a register used to determine the address of an operand

WikipediaRate this definition:0.0 / 0 votes

1. Index register

   An index register in a computer's CPU is a processor register (or an assigned memory location) used for pointing to operand addresses during the run of a program. It is useful for stepping through strings and arrays. It can also be used for holding loop iterations and counters. In some architectures it is used for read/writing blocks of memory. Depending on the architecture it maybe a dedicated index register or a general-purpose register. Some instruction sets allow more than one index register to be used; in that case additional instruction fields may specify which index registers to use.Generally, the contents of an index register is added to (in some cases subtracted from) an immediate address (that can be part of the instruction itself or held in another register) to form the "effective" address of the actual data (operand). Special instructions are typically provided to test the index register and, if the test fails, increments the index register by an immediate constant and branches, typically to the start of the loop. While normally processors that allow an instruction to specify multiple index registers add the contents together, IBM had a line of computers in which the contents were or'd together.Index registers has proved useful for doing vector/array operations and in commercial data processing for navigating from field to field within records. In both uses index registers substantially reduced the amount of memory used and increased execution speed.

ChatGPTRate this definition:0.0 / 0 votes

1. index register

   An index register in a computer's CPU is a processor register used for modifying operand addresses during the run of a program. It is typically used to optimize the calculations in repetitive sequences within program loops, especially when used for array indices in calculations or memory addressing. In simpler terms, it's a storage space where data is temporarily held and manipulated for mathematical or logical operations.

WikidataRate this definition:3.0 / 1 vote

1. Index register

   An index register in a computer's CPU is a processor register used for modifying operand addresses during the run of a program, typically for doing vector/array operations. The contents of an index register is added to an immediate address to form the "effective" address of the actual data. Special instructions are typically provided to test the index register and, if the test fails, increments the index register by an immediate constant and branches, typically to the start of the loop. Some instruction sets allow more than one index register to be used; in that case additional instruction fields specify which index registers to use. While normally processors that allow an instruction to specify multiple index registers add the contents together, IBM had a line of computers in which the contents were or'd together. In early computers without any form of indirect addressing, array operations had to be performed by modifying the instruction address, which required several additional program steps and used up more computer memory, a scarce resource in computer installations of the early era.

Matched Categories

1. • Computer Science
   • Register

How to pronounce index register?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say index register in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of index register in Chaldean Numerology is: 9

2. Pythagorean Numerology

   The numerical value of index register in Pythagorean Numerology is: 4

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=index register
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/Index_Register
3. ^ ChatGPT
   https://chat.openai.com
4. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=index register