Decoding a complex program instruction corresponding to multiple micro-operations
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United States of America Patent
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Apr 3, 2018
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N/A
app pub date -
Aug 22, 2014
filing date -
Oct 9, 2013
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Abstract
A data processing apparatus 2 has processing circuitry 4 which can process multiple parallel threads of processing. A shared instruction decoder 30 decodes program instructions to generate micro-operations to be processed by the processing circuitry 4. The instructions include at least one complex instruction which has multiple micro-operations. Multiple fetch units 8 are provided for fetching the micro-operations generated by the decoder 30 for processing by the processing circuitry 4. Each fetch unit 8 is associated with at least one of the threads. The decoder 30 generates the micro-operations of a complex instruction individually in response to separate decode requests 24 triggered by a fetch unit 8, each decode request 24 identifying which micro-operation of the complex instruction is to be generated by the decoder 30 in response to the decode request 24.
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