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allocate local vars in .data, don't use the stack (we don't need to

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be reentrant here :-)


git-svn-id: svn://svn.cc65.org/cc65/trunk@55 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
cpg 2000-06-11 23:21:30 +00:00
parent 269ae9606d
commit af33f993e1
1 changed files with 23 additions and 41 deletions
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64
libsrc/atari/fdtable.s
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@ -14,7 +14,7 @@
.export newfd
.export getfd
.export _fd_table,_fd_index
.export _fd_table,_fd_index ; for test purposes
.data
MAX_FD_INDEX = 12
@ -180,14 +180,15 @@ ret: rts
; ptr4 - 3,4 (backup)
; devnum - 5
;loc_A = 0
;loc_X = 1
loc_Y = 0
loc_ptr4_l = 1
loc_ptr4_h = 2
loc_tmp1 = 3
loc_devnum = 4
loc_size = 5
.data
loc_Y: .res 1
loc_ptr4_l: .res 1
loc_ptr4_h: .res 1
loc_tmp1: .res 1
loc_devnum: .res 1
loc_size: .res 1
.code
.proc newfd
@ -197,33 +198,21 @@ loc_size = 5
tya
pha
ldy #loc_size
jsr subysp
ldy #loc_devnum
lda #0
sta (sp),y ; loc_devnum
dey
ldx #0
stx loc_devnum
lda tmp1
sta (sp),y ; loc_tmp1
lda #0
sta tmp1 ; init tmp1
sta tmp2 ; init tmp2
dey
sta loc_tmp1
stx tmp1 ; init tmp1
stx tmp2 ; init tmp2
lda ptr4+1
sta (sp),y ; loc_ptr4_h
dey
sta loc_ptr4_h
lda ptr4
sta (sp),y ; loc_ptr4_l
dey
sta loc_ptr4_l
pla
sta (sp),y ; loc_Y
; dey
sta loc_Y
pla
; sta (sp),y ; loc_X
sta ptr4+1
; dey
pla
; sta (sp),y ; loc_A
sta ptr4
; ptr4 points to filename
@ -284,11 +273,9 @@ l1: ldy #0
l2: sta fd_table+ft_dev,x ; set device
lda #1
sta fd_table+ft_usa,x ; set usage counter
ldy #loc_Y
lda (sp),y
lda loc_Y
sta fd_table+ft_iocb,x ; set iocb index
ldy #loc_devnum
lda (sp),y ; get (optional) device number
lda loc_devnum
and #7 ; only 3 bits
sta fd_table+ft_flag,x
lda tmp2
@ -305,8 +292,7 @@ colon2: dey
sec
sbc #'0'
and #7
ldy #loc_devnum
sta (sp),y ; save it
sta loc_devnum
sta tmp2 ; save it for speed later here also
lda #4 ; max. length if only device + number ("Xn:")
cmp tmp3
@ -363,16 +349,12 @@ finish: lda ptr4
pha
lda ptr4+1
pha
ldy #loc_Y
lda (sp),y
lda loc_Y
pha
lda tmp1
pha
ldy #loc_tmp1
lda (sp),y
lda loc_tmp1
sta tmp1
ldy #loc_size
jsr addysp
pla
lsr a ; set C as needed