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cc65/libsrc/runtime/pusha.s
cuz 23c35f27f8 Improved 65c02 support
git-svn-id: svn://svn.cc65.org/cc65/trunk@2507 b7a2c559-68d2-44c3-8de9-860c34a00d81
2003-10-10 17:52:12 +00:00

34 lines
661 B
ArmAsm

;
; Ullrich von Bassewitz, 26.10.2000
;
; CC65 runtime: Push value in a onto the stack
;
.export pusha0sp, pushaysp, pusha
.importzp sp
.macpack cpu
; Beware: The optimizer knows about this function!
pusha0sp:
ldy #$00
pushaysp:
lda (sp),y
pusha: ldy sp ; (3)
beq @L1 ; (6)
dec sp ; (11)
.if (.cpu .bitand CPU_ISET_65SC02)
sta (sp)
.else
ldy #0 ; (13)
sta (sp),y ; (19)
.endif
rts ; (25)
@L1: dec sp+1 ; (11)
dec sp ; (16)
sta (sp),y ; (22)
rts ; (28)