Graphic software functions without branch instructions

Details Graphic software functions without branch instructions Graphic software functions without branch instructions

1995-10-04

1998-06-16

Treat, William M.

Boots, shoes, and leggings

395565, G06F 750

Patent

active

057681724

ABSTRACT:
A method for improving the execution speed of compare operations in graphic software functions running on a RISC processor. A branch instruction in a software function comparing the value of two variables is replaced with an inline compare instruction that encodes the result of the compare into a third variable using an arithmetic shift-left instruction. An inline choice instruction selects the value of one of the two variables using the value of the third variable as a mask. The inline compare and an inline choice instructions reduce processor stalls during execution.

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patent: 5563991 (1996-10-01), Mahoney
Sanna et al., On the Computation of Groups of Bounding Boxes for Fast Test of Objects Intersection, p. 685, IEEE.
Bryan Costales, C from A to Z, 1985, pp. 220-221, Prentice Hall.
D. M. Capper, Introducing C++ for Scientists, Engineers and Mathematicians, 1994, pp. 93-94, Spring Verlag, NY.

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