Difference between revisions of "Z80 Routines:Optimized:StrCopy"
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m (Routines:Optimized:StrCopy moved to Z80 Routines:Optimized:StrCopy: unite z80 routines) |
(not all assemblers support the $$ and $b thing. Example: spasm) |
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| Line 6: | Line 6: | ||
;Destroys AF, DE, HL | ;Destroys AF, DE, HL | ||
xor a ;4 | xor a ;4 | ||
| − | + | docopystr: | |
cp (hl) ;7 | cp (hl) ;7 | ||
ldi ;16 | ldi ;16 | ||
| − | jr nz, | + | jr nz,docopystr ;12 |
ret ;5</nowiki> | ret ;5</nowiki> | ||
Change jr to jp to save a couple clocks and add a byte. | Change jr to jp to save a couple clocks and add a byte. | ||
Latest revision as of 00:59, 9 November 2009
StrCopy: ;Copy zero terminated string at HL to DE. ;Destroys AF, DE, HL xor a ;4 docopystr: cp (hl) ;7 ldi ;16 jr nz,docopystr ;12 ret ;5
Change jr to jp to save a couple clocks and add a byte.
