Method and apparatus for handling invalid opcode faults via execution of an event-signaling micro-operation
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United States of America Patent
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Mar 9, 1999
Grant Date -
N/A
app pub date -
Nov 25, 1996
filing date -
Nov 25, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A microprocessor that handles invalid opcodes via an event-signaling micro-operation is disclosed. The microprocessor comprises a decoder that decodes macroinstructions, including an opcode, into a single microprocessor cycle micro-operation. The decoder detects invalid opcodes and replaces the invalid opcodes with an event-signaling micro-operation that triggers an invalid opcode assist. The invalid opcode assist triggers an invalid opcode exception handler that processes the invalid opcode.
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