[U-Boot] why bic sp, sp, #7 /* 8-byte alignment for ABI compliance */

[janpharm]

Hi All,

After searching via google,I still can not find the hint for

I understand the function of bic command, but did not understand : 

why "bic sp, sp, #7" can be implied for "8-byte alignment for ABI
compliance" ?

can someone offer some example?

thanks!



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