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34 lines
622 B
ArmAsm
34 lines
622 B
ArmAsm
;
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; clock_t clock (void);
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;
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.export _clock
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.constructor initclock
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.forceimport ticktock ; make sure that tickcount changes
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.importzp sreg
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.include "extzp.inc"
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.proc _clock
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lda tickcount+3
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sta sreg+1
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lda tickcount+2
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sta sreg
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ldx tickcount+1
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lda tickcount
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rts
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.endproc
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; Make the process clock start at zero.
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.segment "ONCE"
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initclock:
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lda #0
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ldx #3
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@lp: sta tickcount,x
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dex
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bpl @lp
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rts
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