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In arm assembly code, I am seeing the below line where "=" is used. what exactly this operator is used in arm.

ldr r0, =CONSTANT

what constant we can use, like any address or a variable which holds the address or a value?

shall i use it like

ldr r0, =0x5 (5 is a value)

or

ldr r0, =0x400000 (where 0x400000 is an address)

or

ldr r0, =ADDR_PTR (where ADDR_PTR is a variable hoding a address)

Is all the above things correct or i am understanding something wrong here.
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1 solution

Assuming from your question you do not have a copy of a reference manual, you can find the answers quite easily by following: https://www.google.com/search?q=arm+assembly[^].
 
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Comments
Sergey Alexandrovich Kryukov 2-Sep-15 13:06pm    
Fair enough, a 5.
Note that there are different compilers for the same instruction set architecture; they can have different syntax.
—SA
Richard MacCutchan 2-Sep-15 14:01pm    
Really? I would never have guessed.
Sergey Alexandrovich Kryukov 2-Sep-15 15:51pm    
:-)
chandrAN2& 3-Sep-15 0:46am    
Any link for Arm reference Manual.
Richard MacCutchan 3-Sep-15 3:01am    
Have you tried any of the links I gave you?

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