Mask data generator and bit field operation circuit

Details Mask data generator and bit field operation circuit Mask data generator and bit field operation circuit

1996-10-17

1998-03-17

Lall, Parshotam S.

G06F 700

Patent

active

057297258

ABSTRACT:
With N-bit mask bit data, a bit mask generator generates (L.times.M.times.N)-bit mask data in which the N-bit mask bit data is disposed in one of L.times.M consistent blocks which is specified by M-bit block selection data and L-bit super-block selection data and each bit of the other blocks are stuffed with a stuffing bit. The bit mask generator comprises a first mask generator responsive to the block selection data for generating first mask data by disposing the N-bit mask bit data in one of M blocks of N bits which is specified by one of the M-bit block selection data, and a second mask generator responsive to the super-block selection data for generating the final mask data by disposing the first mask data in one of L super-blocks of M blocks which is specified by one of the L-bit super-block selection data. A bit field operation is performed by using the generated mask data.

REFERENCES:
patent: 4180861 (1979-12-01), Armstrong et al.
patent: 5327543 (1994-07-01), Miura et al.
patent: 5526296 (1996-06-01), Nakahara et al.
patent: 5651121 (1997-07-01), Davies

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