Arm Development Studio forum CMP vc EORS

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CMP vc EORS

Etienne SOBOLE over 12 years ago

Note: This was originally posted on 28th June 2011 at http://forums.arm.com

Can anybody explain me why this code


cmp r0, r1
bne  .exit

is not equivalent to


eors r2, r0, r1
bne  .exit

except that r2 is changed of course !!!

Is the Z flag set when the destination register value is 0 ?

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Simon Craske over 12 years ago

Note: This was originally posted on 28th June 2011 at http://forums.arm.com

Strictly speaking if you care about the N, C and V flags they're not.

CMP =~ SUBS CMN =~ ADDS TST =~ ANDS TEQ =~ EORS

hth
s.
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Simon Craske over 12 years ago

Note: This was originally posted on 28th June 2011 at http://forums.arm.com

Strictly speaking if you care about the N, C and V flags they're not.

CMP =~ SUBS CMN =~ ADDS TST =~ ANDS TEQ =~ EORS

hth
s.
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