cc65/libsrc/runtime/subeqsp.s

;
; Ullrich von Bassewitz, 08.10.1998
;
; CC65 runtime: -= operator for ints on the stack
;

       	.export	       	subeq0sp, subeqysp
   	.importzp	sp

subeq0sp:
   	ldy	#0
subeqysp:
	sec
	eor	#$FF
	adc    	(sp),y
	sta	(sp),y
	pha	      		; Save low byte
	iny
	txa
	eor	#$FF
       	adc	(sp),y
	sta	(sp),y
	tax
	pla			; Restore low byte
	rts
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, 08.10.1998`
			`;`
			`; CC65 runtime: -= operator for ints on the stack`
			`;`

			`.export subeq0sp, subeqysp`
Several SBC optimizations suggested by Piotr Fusik git-svn-id: svn://svn.cc65.org/cc65/trunk@1121 b7a2c559-68d2-44c3-8de9-860c34a00d81 2001-11-17 11:25:12 +00:00			`.importzp sp`
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
			`subeq0sp:`
			`ldy #0`
			`subeqysp:`
			`sec`
Several SBC optimizations suggested by Piotr Fusik git-svn-id: svn://svn.cc65.org/cc65/trunk@1121 b7a2c559-68d2-44c3-8de9-860c34a00d81 2001-11-17 11:25:12 +00:00			`eor #$FF`
			`adc (sp),y`
This commit was generated by cvs2svn to compensate for changes in r2, which included commits to RCS files with non-trunk default branches. git-svn-id: svn://svn.cc65.org/cc65/trunk@3 b7a2c559-68d2-44c3-8de9-860c34a00d81 2000-05-28 13:40:48 +00:00			`sta (sp),y`
Several SBC optimizations suggested by Piotr Fusik git-svn-id: svn://svn.cc65.org/cc65/trunk@1121 b7a2c559-68d2-44c3-8de9-860c34a00d81 2001-11-17 11:25:12 +00:00			`pha ; Save low byte`
This commit was generated by cvs2svn to compensate for changes in r2, which included commits to RCS files with non-trunk default branches. git-svn-id: svn://svn.cc65.org/cc65/trunk@3 b7a2c559-68d2-44c3-8de9-860c34a00d81 2000-05-28 13:40:48 +00:00			`iny`
Several SBC optimizations suggested by Piotr Fusik git-svn-id: svn://svn.cc65.org/cc65/trunk@1121 b7a2c559-68d2-44c3-8de9-860c34a00d81 2001-11-17 11:25:12 +00:00			`txa`
			`eor #$FF`
			`adc (sp),y`
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			`sta (sp),y`
			`tax`
Several SBC optimizations suggested by Piotr Fusik git-svn-id: svn://svn.cc65.org/cc65/trunk@1121 b7a2c559-68d2-44c3-8de9-860c34a00d81 2001-11-17 11:25:12 +00:00			`pla ; Restore low byte`
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			`rts`