(16C) show which bits are set in a number

[Dieter]

(03-06-2019 09:41 AM)wynen Wrote:  

Code:

008-43, 6, 4 :   F? 4      // carry set?
009-   43  2 :   x<0       // yes, but x<0 is always false (because of shift right)
010-   22  1 :   GTO 1     // carry not set

Ah, great – one of the good old tricks from the golden days of RPN programming: have a test followed by another one that always tests false, and you get an inverse test. So the combination of F? 4 and x<0? tests if flag 4 is clear.

I wouldn't have expected that anyone may still remember these things. ;-)

Dieter