Execution of a sequence of vector instructions preceded by a swizzle sequence instruction specifying data element shuffle orders respectively
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United States of America Patent
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Oct 12, 2010
Grant Date -
Apr 29, 2010
app pub date -
Oct 23, 2008
filing date -
Oct 23, 2008
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Abstract
Operand vector multiplexer sequence control is used in a vector-based execution unit to control the shuffling of data elements in operand vectors used by a sequence of vector instructions processed by the vector-based execution unit. A swizzle sequence instruction is defined in an instruction set for the vector-based execution unit and is used to selectively apply a sequence of vector data element shuffle orders to one or more operand vectors to be used by the associated sequence of vector instructions. As a result, when a common sequence of data element shuffle orders is used frequently for a sequence of vector instructions, a single swizzle sequence instruction may be used to select the desired sequence of custom data element ordering for each of the vector instructions in the sequence.
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