Appeal No. 96-2446
Application 08/246,179
an instruction decoding unit for decoding instructions, said
instructions including arithmetic operation instructions and conditional
branch instructions;
a calculator for operating N-bit data in accordance with decoded
instructions, N being an integer;
a plurality of flag storage means, each of said plurality of flag storage
means storing flag groups, each of said flag groups being changed
based on a different bit width of N-bit data obtained by operation of
said calculator;
a flag selecting means for selecting one of said plurality of flag
storage means in accordance with an indication in a conditional
branch instruction decoded by said instruction decoding unit; and
a branch judging unit for receiving a branch condition from a
conditional branch instruction decoded by said instruction decoding
unit and judging whether to branch, by referring to a flag group stored
in a flag storage means selected by said flag selecting means.
Independent claim 12 is reproduced as follows:
12. An apparatus for processing data comprising:
an instruction decoding unit for decoding arithmetic operation
instructions and conditional branch instructions;
a calculator for executing decoded instructions on data having a width
of N-bits, N being an integer, to produce calculator results along with
a plurality of flag groups, each flag group representing calculator
results from a different bit width of data for later selecting an
appropriate flag group;
storage means, for simultaneously storing the plurality of flag
groups;
3
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