mirror of https://github.com/cc65/cc65.git
40 lines
1.0 KiB
ArmAsm
40 lines
1.0 KiB
ArmAsm
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; Ullrich von Bassewitz, 26.10.2000
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; Christian Krueger, 12-Mar-2017, added 65SC02 optimization
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;
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; CC65 runtime: Store a/x indirect into address at top of stack with index
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;
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.export staxspidx
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.import incsp2
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.importzp sp, tmp1, ptr1
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.macpack cpu
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.proc staxspidx
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sty tmp1 ; Save Y
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pha ; Save A
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ldy #1
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lda (sp),y
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sta ptr1+1
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.if (.cpu .bitand ::CPU_ISET_65SC02)
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lda (sp)
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.else
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dey
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lda (sp),y
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.endif
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sta ptr1 ; Address now in ptr1
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ldy tmp1 ; Restore Y
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iny ; Address high byte
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txa ; Get high byte
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sta (ptr1),y ; Store high byte
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dey ; Address low byte
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pla ; Restore low byte into A
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sta (ptr1),y ; Store low byte
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jmp incsp2 ; Drop address
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.endproc
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