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NEON-How to shift the whole D or Q to left or right?
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NEON-How to shift the whole D or Q to left or right?
Offline
Alan Chen
over 7 years ago
Note: This was originally posted on 12th July 2012 at http://forums.arm.com
Hello
Base on NEON instuction set, I can find the VSHL or VSHR to perform shift operation. But it is just for every element.
How can I shift the whole D or Q register to left or right?
For instance, if D = 0x0001020304050607, when it shift right 8 bit, it should become D=0x0000010203040506.
Best Regards,
Alan Chen
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Peter Harris
over 7 years ago
Note: This was originally posted on 16th July 2012 at
http://forums.arm.com
Use the same principle as a rotate (shown in the manual), but feed in a register of zeros for one or other of the registers, depending which way you are shifting.
http://infocenter.ar...h/CIHGAEFI.html
HTH,
Iso
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Peter Harris
over 7 years ago
Note: This was originally posted on 16th July 2012 at
http://forums.arm.com
Use the same principle as a rotate (shown in the manual), but feed in a register of zeros for one or other of the registers, depending which way you are shifting.
http://infocenter.ar...h/CIHGAEFI.html
HTH,
Iso
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