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base:advanced_optimizing [2018-09-13 14:26] – [Counting bits] bitbreakerbase:advanced_optimizing [2021-01-20 10:15] – [Forming terms] bitbreaker
Line 1433: Line 1433:
  
 There are of course also other expressions possible, just ponder a while about the term. There are of course also other expressions possible, just ponder a while about the term.
 +
 +How's about forming terms with logical operations? We notice, that for e.g. (a + b) xor $ff is the same as (a xor $ff) - b:
 +
 +<code>
 +          lda num1
 +          clc
 +          adc num2
 +          eor #$ff
 +
 +          ;can also be written as
 +          lda num1
 +          eor #$ff
 +          sec
 +          sbc num2
 +</code>
 ====== Running out of registers ====== ====== Running out of registers ======
  
base/advanced_optimizing.txt · Last modified: 2024-03-03 11:06 by bitbreaker