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Guy Harris (talk | contribs) No, an SR that doesn't generate an overflow (subtracting a register from itself won't generate an overflow) is as fast as or faster than XR on S/360 models 30, 40, 50, 65, and 75. Do you have any reliable sources indicating that, on some other models, XR is faster? |
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DROP 12 The opposite of 'USING'
SR 15,15 Set register 15 to 0 so that the return code (R15) is Zero
BR 14 Return to caller
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