erations with faster operations. Which of the following code replacements is an illustration of operator strength reduction? a. Replace P + P by 2 * P or Replace 3 + 4 by 7 b. Replace P * 32 by P<<5 c. Replace P * 0 by 0 d. Replace (P<<4) – P by P * 15
erations with faster operations. Which of the following code replacements is an illustration of operator strength reduction? a. Replace P + P by 2 * P or Replace 3 + 4 by 7 b. Replace P * 32 by P<<5 c. Replace P * 0 by 0 d. Replace (P<<4) – P by P * 15
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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19. | In compiler optimization, operator strength reduction uses mathematical identities to replace slow math operations with faster operations. Which of the following code replacements is an illustration of operator strength reduction? |
a. | Replace P + P by 2 * P or Replace 3 + 4 by 7 |
b. | Replace P * 32 by P<<5 |
c. | Replace P * 0 by 0 |
d. | Replace (P<<4) – P by P * 15 |
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