Export (0) Print
Expand All

Macro Function for Shuffle Using Streaming SIMD Extensions

SSE provides a macro function to help create constants that describe shuffle operations. The macro takes four small integers (in the range of 0 to 3) and combines them into an 8-bit immediate value used by the SHUFPS instruction. See the following example.

_MM_SHUFFLE(z, y, x, w)
/* expands to the following value */
(z<<6) | (y<<4) | (x<<2) | w

You can view the four integers as selectors for choosing which two words from the first input operand and which two words from the second are to be put into the result word.

View of Original and Result Words with Shuffle Function Macro


Original and Result Words with Shuffle Function

Community Additions

ADD
Show:
© 2014 Microsoft