Method of sorting signed numbers and solving absolute differences using packed instructions
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United States of America Patent
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Mar 14, 2000
Issued Date -
N/A
app pub date -
May 20, 1997
filing date -
Dec 20, 1995
priority date (Note) -
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Abstract
A technique for sorting packed signed numbers of two operands into maxima and minima operands and solving absolute differences for each pair of corresponding values of maxima and minima. After packing two source operands with a plurality of data elements containing signed values, a greater-than comparison operation is performed on each pair of corresponding numbers in the two operands to determine which is greater. An exclusive-OR mask is generated for use in swapping those values which need to be rearranged so that all maxima are in one operand and all minima are in another operand. Once the sorting of maxima and minima is complete, a packed subtraction operation is then performed by subtracting the minima from corresponding maxima to obtain absolute differences.
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