Removed (pretty inconsistently used) tab chars from source code base.
This commit is contained in:
@@ -15,79 +15,79 @@
|
||||
; in a/x is of any use.
|
||||
;
|
||||
|
||||
.export _memset, _bzero, __bzero
|
||||
.import popax
|
||||
.importzp sp, ptr1, ptr2, ptr3
|
||||
.export _memset, _bzero, __bzero
|
||||
.import popax
|
||||
.importzp sp, ptr1, ptr2, ptr3
|
||||
|
||||
_bzero:
|
||||
__bzero:
|
||||
sta ptr3
|
||||
stx ptr3+1 ; Save n
|
||||
ldx #0 ; Fill with zeros
|
||||
ldx #0 ; Fill with zeros
|
||||
beq common
|
||||
|
||||
_memset:
|
||||
sta ptr3 ; Save n
|
||||
stx ptr3+1
|
||||
jsr popax ; Get c
|
||||
tax
|
||||
sta ptr3 ; Save n
|
||||
stx ptr3+1
|
||||
jsr popax ; Get c
|
||||
tax
|
||||
|
||||
; Common stuff for memset and bzero from here
|
||||
|
||||
common: ; Fill value is in X!
|
||||
ldy #1
|
||||
common: ; Fill value is in X!
|
||||
ldy #1
|
||||
lda (sp),y
|
||||
sta ptr1+1 ; save high byte of ptr
|
||||
dey ; Y = 0
|
||||
sta ptr1+1 ; save high byte of ptr
|
||||
dey ; Y = 0
|
||||
lda (sp),y ; Get ptr
|
||||
sta ptr1
|
||||
sta ptr1
|
||||
|
||||
lsr ptr3+1 ; divide number of
|
||||
ror ptr3 ; bytes by two to increase
|
||||
bcc evenCount ; speed (ptr3 = ptr3/2)
|
||||
lsr ptr3+1 ; divide number of
|
||||
ror ptr3 ; bytes by two to increase
|
||||
bcc evenCount ; speed (ptr3 = ptr3/2)
|
||||
oddCount:
|
||||
; y is still 0 here
|
||||
txa ; restore fill value
|
||||
sta (ptr1),y ; save value and increase
|
||||
inc ptr1 ; dest. pointer
|
||||
bne evenCount
|
||||
inc ptr1+1
|
||||
; y is still 0 here
|
||||
txa ; restore fill value
|
||||
sta (ptr1),y ; save value and increase
|
||||
inc ptr1 ; dest. pointer
|
||||
bne evenCount
|
||||
inc ptr1+1
|
||||
evenCount:
|
||||
lda ptr1 ; build second pointer section
|
||||
clc
|
||||
adc ptr3 ; ptr2 = ptr1 + (length/2) <- ptr3
|
||||
sta ptr2
|
||||
lda ptr1+1
|
||||
adc ptr3+1
|
||||
sta ptr2+1
|
||||
lda ptr1 ; build second pointer section
|
||||
clc
|
||||
adc ptr3 ; ptr2 = ptr1 + (length/2) <- ptr3
|
||||
sta ptr2
|
||||
lda ptr1+1
|
||||
adc ptr3+1
|
||||
sta ptr2+1
|
||||
|
||||
txa ; restore fill value
|
||||
ldx ptr3+1 ; Get high byte of n
|
||||
beq L2 ; Jump if zero
|
||||
txa ; restore fill value
|
||||
ldx ptr3+1 ; Get high byte of n
|
||||
beq L2 ; Jump if zero
|
||||
|
||||
; Set 256/512 byte blocks
|
||||
; y is still 0 here
|
||||
L1: .repeat 2 ; Unroll this a bit to make it faster
|
||||
sta (ptr1),y ; Set byte in lower section
|
||||
sta (ptr2),y ; Set byte in upper section
|
||||
iny
|
||||
.endrepeat
|
||||
bne L1
|
||||
inc ptr1+1
|
||||
inc ptr2+1
|
||||
dex ; Next 256 byte block
|
||||
bne L1 ; Repeat if any
|
||||
; y is still 0 here
|
||||
L1: .repeat 2 ; Unroll this a bit to make it faster
|
||||
sta (ptr1),y ; Set byte in lower section
|
||||
sta (ptr2),y ; Set byte in upper section
|
||||
iny
|
||||
.endrepeat
|
||||
bne L1
|
||||
inc ptr1+1
|
||||
inc ptr2+1
|
||||
dex ; Next 256 byte block
|
||||
bne L1 ; Repeat if any
|
||||
|
||||
; Set the remaining bytes if any
|
||||
|
||||
L2: ldy ptr3 ; Get the low byte of n
|
||||
beq leave ; something to set? No -> leave
|
||||
L2: ldy ptr3 ; Get the low byte of n
|
||||
beq leave ; something to set? No -> leave
|
||||
|
||||
L3: dey
|
||||
sta (ptr1),y ; set bytes in low
|
||||
sta (ptr2),y ; and high section
|
||||
bne L3 ; flags still up to date from dey!
|
||||
leave:
|
||||
jmp popax ; Pop ptr and return as result
|
||||
L3: dey
|
||||
sta (ptr1),y ; set bytes in low
|
||||
sta (ptr2),y ; and high section
|
||||
bne L3 ; flags still up to date from dey!
|
||||
leave:
|
||||
jmp popax ; Pop ptr and return as result
|
||||
|
||||
|
||||
|
||||
Reference in New Issue
Block a user