What does $ in CJNE and SJMP in 8051 assembly mean?

Question

I see $ in SJMP, CJNE and other instructions in 8051 assembly code and don't know what it does. Here

CJNE A,#'A',$+5   
SJMP $

Can you tell me the purpose of it?

score 1 · Answer 1 · answered Mar 30 '19 at 12:08

It's a special label indicating the current line. SJMP $ is equivalent to

currentline: SJMP currentline

And CJNE A,#'A',$+5 will jump to the instruction 5 bytes ahead when the condition matches

In fact it's the same as the dollar sign in assembly languages for many other architectures

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