Efficient Streaming of Un-Aligned Load/Store Instructions that Save Unused Non-Aligned Data in a Scratch Register for the Next Instruction
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United States of America Patent
Stats
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N/A
Issued Date -
May 10, 2007
app pub date -
Nov 7, 2005
filing date -
Nov 7, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A memory block with any source alignment is streamed into general-purpose registers (GPRs) as aligned data using a streaming load instruction. A streaming store instruction reads the aligned data from the GPRs and writes the data into memory with any destination alignment. Data is streamed from any source alignment to any destination alignment. Memory accesses are aligned to memory lines. The data is rotated using the offset within a memory line of the base address. The rotated data is stored in a scratch register for use by the next streaming load instruction. Rotated data just read from memory is combined with rotated data in the scratch register read by the last streaming load instruction to generate result data to load into the destination GPR. Streaming condition codes are set when the block's end is detected to disable future streaming instructions. Aligned memory accesses at full bandwidth read the un-aligned block.
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Cited Art Landscape
Patent Citation Ranking
- 26 Citation Count
- G06F Class
- 52.24 % this patent is cited more than
- 18 Age