2000-10-25 19:53:22 +00:00
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;
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; Ullrich von Bassewitz, 25.10.2000
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;
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; CC65 runtime: Increment the stackpointer by 2. For performance reasons,
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2018-03-07 20:01:29 +00:00
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; this module also contains the popax function.
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2000-10-25 19:53:22 +00:00
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2013-05-09 11:56:54 +00:00
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.export popax, incsp2
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.importzp sp
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2000-10-25 19:53:22 +00:00
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2003-10-10 17:52:12 +00:00
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.macpack cpu
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2000-10-25 19:53:22 +00:00
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; Pop a/x from stack. This function will run directly into incsp2
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2013-05-09 11:56:54 +00:00
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.proc popax
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2000-10-25 19:53:22 +00:00
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2013-05-09 11:56:54 +00:00
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ldy #1
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lda (sp),y ; get hi byte
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tax ; into x
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2003-10-10 17:52:12 +00:00
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.if (.cpu .bitand ::CPU_ISET_65SC02)
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2013-05-09 11:56:54 +00:00
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lda (sp) ; get lo byte
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2000-11-27 23:37:53 +00:00
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.else
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2013-05-09 11:56:54 +00:00
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dey
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lda (sp),y ; get lo byte
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2000-11-27 23:37:53 +00:00
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.endif
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2000-10-25 19:53:22 +00:00
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.endproc
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2013-05-09 11:56:54 +00:00
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.proc incsp2
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2000-10-25 19:53:22 +00:00
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2003-10-08 21:09:24 +00:00
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inc sp ; 5
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beq @L1 ; 2
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inc sp ; 5
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beq @L2 ; 2
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rts
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@L1: inc sp ; 5
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@L2: inc sp+1 ; 5
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rts
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2000-10-25 19:53:22 +00:00
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.endproc
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