The x86 architecture includes an instruction called Decimal Adjust after Addition(DAA). DAA performs the following sequence of instructions:if ((AL AND OFH) >9) OR (AF = 1) thenALAL + 6;AF 1;elseAF = 0;endif;ifelse(AL> 9FH) OR (CF = 1) thenALAL + 60H;CF - 1;CF = 0;endif."H" indicates hexadecimal. AL is an 8-bit register that holds the result of addition oftwo unsigned 8-bit integers. AF is a flag set if there is a carry from bit 3 to bit 4 in theresult of an addition. CF is a flag set if there is a carry from bit 7 to bit 8. Explain thefunction performed by the DAA instruction.

DAA: DAA is the instruction that supports BCD addition. The addition of BCD is done like binary…

Answered: The x86 architecture includes an…

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The x86 architecture includes an instruction DAA). DAA performs the following sequen-

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Concept explainers

Computer Fundamentals

The computer is termed computation. For calculating or computing something the device that has been used is known as the computer. Or we can say that for performing a fast arithmetic operation the device that has been used is a computer. Storing, processing, and retrieving are the main features of a computer. 

Question

The x86 architecture includes an instruction called Decimal Adjust after Addition
(DAA). DAA performs the following sequence of instructions:
if ((AL AND OFH) >9) OR (AF = 1) then
ALAL + 6;
AF 1;
else
AF = 0;
endif;
if
else
(AL> 9FH) OR (CF = 1) then
ALAL + 60H;
CF - 1;
CF = 0;
endif.
"H" indicates hexadecimal. AL is an 8-bit register that holds the result of addition of
two unsigned 8-bit integers. AF is a flag set if there is a carry from bit 3 to bit 4 in the
result of an addition. CF is a flag set if there is a carry from bit 7 to bit 8. Explain the
function performed by the DAA instruction.

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