411 REFERENCE · Wikibooks
360 Assembly/360 Instructions/CR
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Format
CR 2,6 compares the values inside the registers R2 and R6
If R2 is equal to R6 then it sets the condition code in PSW 0.
If the R2 is greater than R6 then it sets the Condition Code in PSW 2.
Otherwise it sets the condition code in PWS 1.