Floating Point Exception Control via Per-Instruction Masks
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Solution Overview
Problem
Current methods for managing floating point controls in computing environments require serialization to update floating point control/status registers, which is expensive and inefficient, especially when renaming the register is necessary.
Innovation Solution
A computer-implemented method that allows for the determination of an effective enablement control for floating point exceptions by combining user-specified values with centralized status exception controls, enabling efficient execution of instructions without the need for serialization or register renaming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If floating point control/status register is updated using traditional methods, then floating point controls can be managed, but serialization is required which stops processing and reduces productivity
Solution Approach 1:
The floating point control management is segmented into per-instruction exception enablement controls rather than a single centralized register update. Each instruction can specify its own exception enablement mask, eliminating the need for serialization during control updates while maintaining proper exception handling for each operation.
2Adaptability or versatility
If floating point control register renaming is implemented, then control management flexibility is improved, but implementation cost and device complexity increases significantly
Solution Approach 1:
The exception enablement control is extracted from the centralized floating point control/status register and embedded directly into individual floating point instructions. This eliminates the need for complex register renaming mechanisms while providing per-instruction control flexibility through the instruction's own exception enablement mask field.
3Manufacturing precision
If serialization is performed to update floating point controls, then control updates are ensured to be accurate, but processing time increases and efficiency decreases
Solution Approach 1:
The exception enablement control is predetermined and embedded within each floating point instruction during instruction generation. This preliminary action eliminates the need for subsequent serialization during execution, as the control information is already in place with the instruction, ensuring both accuracy and time efficiency.
Data Source
AI summary
Setting or updating of floating point controls is managed. Floating point controls include controls used for floating point operations, such as rounding mode and/or other controls. Further, floating point controls include status associated with floating point operations, such as floating point exceptions and/or others. The management of the floating point controls includes efficiently updating the controls, while reducing costs associated therewith.