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optimised INCR & DECR variable - Printable Version

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optimised INCR & DECR variable - LCD - 2009-05-11

Because I also coded some stuff in AMOS on Amiga: How about optimised INCR and DECR commands for variables? This can be easyly optimised because Z80 knows INC and DEC commands, and variable=variable+1 is maybe much slower.
INCR variable incrases the value by one. This will be very handy, I think Smile.

Re: optimised INCR & DECR variable - boriel - 2009-05-12

LCD Wrote:Because I also coded some stuff in AMOS on Amiga: How about optimised INCR and DECR commands for variables? This can be easyly optimised because Z80 knows INC and DEC commands, and variable=variable+1 is maybe much slower.
INCR variable increases the value by one. This will be very handy, I think Smile.
Well, using -O3 should convert variable=variable+1 to inc(variable). If not, its something to be done.

Re: optimised INCR & DECR variable - LCD - 2009-05-12

boriel Wrote:
LCD Wrote:Because I also coded some stuff in AMOS on Amiga: How about optimised INCR and DECR commands for variables? This can be easyly optimised because Z80 knows INC and DEC commands, and variable=variable+1 is maybe much slower.
INCR variable increases the value by one. This will be very handy, I think Smile.
Well, using -O3 should convert variable=variable+1 to inc(variable). If not, its something to be done.

Aha, thank you, I was compiling with -O2 (forgot to change again after changing for a little test)...