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MECHANISM FOR HANDLING UNFUSED MULTIPLY-ACCUMULATE ACCRUED EXCEPTION BITS IN A PROCESSOR
MECHANISM FOR HANDLING UNFUSED MULTIPLY-ACCUMULATE ACCRUED EXCEPTION BITS IN A PROCESSOR
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机译:处理机中未使用的多累积累积异常位的机制
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摘要
A mechanism for handling unfused multiply-add accrued exception bits includes a processor including a floating point unit, a storage, and exception logic. The floating-point unit may be configured to execute an unfused multiply-accumulate instruction defined with the instruction set architecture (ISA). The unfused multiply-accumulate instruction may include a multiply sub-operation and an accumulate sub-operation. The storage may be configured to maintain floating-point exception state information. The exception logic may be configured to capture the floating-point exception state after completion of the multiply sub-operation and prior to completion of the accumulate sub-operation, for example, and to update the storage to reflect the floating-point exception state.
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