Packed Rotate Processors Masked Data Element Rotation
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Solution Overview
Problem
Current processors lack efficient mechanisms for performing packed rotate operations on multiple data elements simultaneously, which is essential for parallel processing in SIMD architectures, leading to limitations in data manipulation and processing speed.
Innovation Solution
The development of packed rotate instructions and execution logic within processors that allow for simultaneous rotation of multiple data elements using packed rotate operations, including masked and broadcasted rotation, enabling efficient parallel data manipulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If processors use traditional single-data-element instructions, then instruction simplicity is maintained, but data processing parallelism and speed are limited
Solution Approach 1:
The patent divides a wide register (e.g., 256-bit) into multiple smaller data elements (e.g., eight 32-bit elements or sixteen 16-bit elements), allowing independent rotation operations on each element simultaneously through packed rotate instructions. This segmentation enables parallel processing while maintaining manageable instruction structures.
Solution Approach 2:
The patent combines multiple rotation operations into a single packed rotate instruction that operates on multiple data elements simultaneously. By merging these operations at the instruction level, the processor achieves parallel execution without requiring multiple separate instructions, thus improving productivity while controlling complexity.
2Productivity
If processors implement packed rotate operations on multiple data elements, then parallel processing capability is improved, but hardware complexity increases
Solution Approach 1:
The execution logic is designed to handle multiple data element sizes (16-bit, 32-bit, 64-bit) and different rotation modes (left rotate, right rotate, masked rotate) through a unified packed rotate instruction structure. This multi-functionality allows the same hardware to perform various rotation operations in parallel, improving productivity without proportionally increasing hardware complexity.
Solution Approach 2:
The execution logic dynamically adapts to different data element configurations based on instruction parameters. The processor can adjust the number and size of data elements processed in parallel, as well as enable or disable masking operations, allowing flexible optimization of hardware resource utilization for different workload requirements.
3Manufacturing precision
If masked rotate operations are implemented for conditional storage, then data manipulation precision is improved, but instruction complexity increases
Solution Approach 1:
The masking operation is prepared in advance by loading mask values into dedicated mask registers before executing the packed rotate instruction. This preliminary preparation allows the execution logic to efficiently apply masks during the rotation operation without adding significant complexity to the instruction format, as the mask configuration is separated from the rotation operation itself.
Data Source
AI summary
A method of an aspect includes receiving a masked packed rotate instruction. The instruction indicates a first source packed data including a plurality of packed data elements, a packed data operation mask having a plurality of mask elements, at least one rotation amount, and a destination storage location. A result packed data is stored in the destination storage location in response to the instruction. The result packed data includes result data elements that each correspond to a different one of the mask elements in a corresponding relative position. Result data elements that are not masked out by the corresponding mask element include one of the data elements of the first source packed data in a corresponding position that has been rotated. Result data elements that are masked out by the corresponding mask element include a masked out value. Other methods, apparatus, systems, and instructions are disclosed.