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Single instruction to mask off upper half word of register
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Single instruction to mask off upper half word of register
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Jawad Atiq
over 7 years ago
Note: This was originally posted on 3rd December 2012 at http://forums.arm.com
Hi,
I've been looking around for a single Arm instruction that takes the word stored in a general purpose register and masks off the upper half word (top 16 bits).
There are probably other ways of doing this, for example:
LDR R1 = 0xFFFF
AND R0, R0, R1
But is there a specific instruction that does this? I was looking at LDRH but this instruction does not accept a register as an operand, only constants.
Thanks!
Jawad
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Offline
Jawad Atiq
over 7 years ago
Note: This was originally posted on 4th December 2012 at
http://forums.arm.com
I'm using a core based on ARMv5, so I'll stick with the pre-v6 instructions.
Thanks isogen74 and sim!
Jawad
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Jawad Atiq
over 7 years ago
Note: This was originally posted on 4th December 2012 at
http://forums.arm.com
I'm using a core based on ARMv5, so I'll stick with the pre-v6 instructions.
Thanks isogen74 and sim!
Jawad
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