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Add comment about dividing by 4

The comment clarifies that because we track label addresses in32bit words, but that immediate values are in bytes, the codeneeds to divide immediate values by 4, while leaving symbols(label) addresses as-is.

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esp32_ulp
- opcodes.py

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`‎esp32_ulp/opcodes.py‎`

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Original file line number	Diff line number	Diff line change
`@@ -619,6 +619,7 @@ def i_jump(target, condition='--'):`
`619`	`619`	`raiseValueError("invalid flags condition")`
`620`	`620`	`iftarget.type==IMMortarget.type==SYM:`
`621`	`621`	`_bx.dreg=0`
	`622`	`+# we track label addresses in 32bit words, but immediate values are in bytes and need to get divided by 4.`
`622`	`623`	`_bx.addr=get_abs(target)iftarget.type==SYMelseget_abs(target)>>2# bitwise version of "// 4"`
`623`	`624`	`_bx.unused=0`
`624`	`625`	`_bx.reg=0`

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Commit78e9812

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`‎esp32_ulp/opcodes.py‎`

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