Storing and processing SIMD saturation history flags and data size
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United States of America Patent
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app pub date -
May 1, 2008
filing date -
Aug 9, 2002
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Abandoned
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Abstract
A method and apparatus for calculation and storage of Single-Instruction-Multiple-Data (SIMD) saturation history information. A first coprocessor instruction has a first format identifying a saturation operation, a first source having packed data elements and a second source having packed data elements. The saturating operation is executed on the packed data elements of the first and second sources. Saturation flags are stored in the Wireless Coprocessor Saturation Status Flag (wCSSF) register to indicate if a result of the saturating operation saturated. A second coprocessor instruction has a second format identifying a saturation history processing operation and a saturation data size. An operand for the processing operation is determined based on the saturation data size, and the processing operation is executed on the saturation flags and the operand for the saturation data size. Condition code flags are stored in a status register to indicate the result of processing operation.
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