cc65/libsrc/runtime/swap.s

;
; Ullrich von Bassewitz, 06.08.1998
; Christian Krueger, 11-Mar-2017, added 65SC02 optimization
;
; CC65 runtime: swap ax with TOS
;

        .export         swapstk
        .importzp       sp, ptr4

        .macpack        cpu

swapstk:
        sta     ptr4
        stx     ptr4+1
        ldy     #1              ; index
        lda     (sp),y
        tax
        lda     ptr4+1
        sta     (sp),y
.if (.cpu .bitand ::CPU_ISET_65SC02)
        lda     (sp)
        tay
        lda     ptr4
        sta     (sp)
        tya
.else
        dey
        lda     (sp),y
        pha
        lda     ptr4
        sta     (sp),y
        pla
.endif
        rts                     ; whew!
This commit was generated by cvs2svn to compensate for changes in r2, which included commits to RCS files with non-trunk default branches. git-svn-id: svn://svn.cc65.org/cc65/trunk@3 b7a2c559-68d2-44c3-8de9-860c34a00d81 2000-05-28 13:40:48 +00:00			`;`
			`; Ullrich von Bassewitz, 06.08.1998`
few 6502 and some 65SC02 optimizations 2017-03-12 22:21:43 +00:00			`; Christian Krueger, 11-Mar-2017, added 65SC02 optimization`
This commit was generated by cvs2svn to compensate for changes in r2, which included commits to RCS files with non-trunk default branches. git-svn-id: svn://svn.cc65.org/cc65/trunk@3 b7a2c559-68d2-44c3-8de9-860c34a00d81 2000-05-28 13:40:48 +00:00			`;`
			`; CC65 runtime: swap ax with TOS`
			`;`

Removed (pretty inconsistently used) tab chars from source code base. 2013-05-09 11:56:54 +00:00			`.export swapstk`
			`.importzp sp, ptr4`
This commit was generated by cvs2svn to compensate for changes in r2, which included commits to RCS files with non-trunk default branches. git-svn-id: svn://svn.cc65.org/cc65/trunk@3 b7a2c559-68d2-44c3-8de9-860c34a00d81 2000-05-28 13:40:48 +00:00
few 6502 and some 65SC02 optimizations 2017-03-12 22:21:43 +00:00			`.macpack cpu`

This commit was generated by cvs2svn to compensate for changes in r2, which included commits to RCS files with non-trunk default branches. git-svn-id: svn://svn.cc65.org/cc65/trunk@3 b7a2c559-68d2-44c3-8de9-860c34a00d81 2000-05-28 13:40:48 +00:00			`swapstk:`
Removed (pretty inconsistently used) tab chars from source code base. 2013-05-09 11:56:54 +00:00			`sta ptr4`
			`stx ptr4+1`
			`ldy #1 ; index`
			`lda (sp),y`
			`tax`
			`lda ptr4+1`
			`sta (sp),y`
few 6502 and some 65SC02 optimizations 2017-03-12 22:21:43 +00:00			`.if (.cpu .bitand ::CPU_ISET_65SC02)`
			`lda (sp)`
			`tay`
			`lda ptr4`
			`sta (sp)`
remove dangling spaces 2022-04-17 14:06:22 +00:00			`tya`
			`.else`
Removed (pretty inconsistently used) tab chars from source code base. 2013-05-09 11:56:54 +00:00			`dey`
			`lda (sp),y`
			`pha`
			`lda ptr4`
			`sta (sp),y`
			`pla`
remove dangling spaces 2022-04-17 14:06:22 +00:00			`.endif`
Removed (pretty inconsistently used) tab chars from source code base. 2013-05-09 11:56:54 +00:00			`rts ; whew!`