Mechanism for floating point to integer conversion with RGB bias

Details Mechanism for floating point to integer conversion with RGB bias Mechanism for floating point to integer conversion with RGB bias

1998-03-26

2000-05-09

Treat, William M.

Electrical computers and digital processing systems: processing

Processing control

Arithmetic operation instruction processing

G06F 738

Patent

active

060617829

ABSTRACT:
An apparatus and method for performing a floating point multiply (by a fixed graphics constant), and converting the product of the multiply into an integer, within a single operation is provided. The apparatus includes detection logic to determine whether a special multiply/convert operation is specified, and if so, floating point conversion logic to adjust a bias constant prior to conversion of the floating point number to an integer. More specifically, if the multiply/convert operation specified relates to calculation of graphic points for display, execution of the multiply convert operation effectively multiplies a specified floating point number by a graphics constant, as part of subtracting the exponent bias.

REFERENCES:
patent: 5257215 (1993-10-01), Poon
patent: 5734874 (1998-03-01), Van Hook et al.
patent: 5856829 (1999-01-01), Gray, III et al.
patent: 5878266 (1999-03-01), Goddard et al.

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