System for processing shift, mask, and merge operations in one i

Details System for processing shift, mask, and merge operations in one i System for processing shift, mask, and merge operations in one i

1993-12-23

1996-01-23

Treat, William M.

Boots, shoes, and leggings

364DIG1, G06F 9305, G06F 9315

Patent

active

054871590

ABSTRACT:
A method and system for executing shift, mask, and merge operations on two operands specified by one instruction contains two registers holding operand data and separate shift, mask, and merge logic. A programmer-defined set of mask and merge indicators controls the mask and merge operations. Each mask and merge indicator is represented as a single bit but controls a pair of bits in an operand. If the first operand is selected by the programmer, it is shifted and then masked. The result of the shift and mask operations is merged with the second operand. If the second operand is selected, it is shifted and masked, and the result is merged with the first operand. Final results are stored for processing by subsequent instructions.

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