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/*
* $Xorg: stipple68k.s,v 1.4 2001/02/09 02:04:39 xorgcvs Exp $
*
Copyright 1990, 1998 The Open Group
Permission to use, copy, modify, distribute, and sell this software and its
documentation for any purpose is hereby granted without fee, provided that
the above copyright notice appear in all copies and that both that
copyright notice and this permission notice appear in supporting
documentation.
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Except as contained in this notice, the name of The Open Group shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from The Open Group.
*
* Author: Keith Packard, MIT X Consortium
*/
/* $XFree86: xc/programs/Xserver/cfb/stipple68k.s,v 3.2 2001/01/17 22:36:38 dawes Exp $ */
/*
* Stipple code for 68k processors
*/
#ifdef __ELF__
#ifdef TETEXT
#define _cfbStippleStack cfbStippleStackTE
#else
#define _cfbStippleStack cfbStippleStack
#endif
#else
#ifdef TETEXT
#define _cfbStippleStack _cfbStippleStackTE
#endif
#endif
#define atemp a0
#define addr a1
#define stipple a2
#define stride a3
#define case a4
#define ctemp d0
#define value d1
#define count d2
#define shift d3
#define c d4
#define lshift d5
#define rshift d6
#define PushMask #0x3e38
#define PopMask #0x1c7c
#define NumReg 8
#define arg0 36
#define arg1 40
#define arg2 44
#define arg3 48
#define arg4 52
#define arg5 56
#define arg6 60
#ifdef __ELF__
#define ForEachLine .L2
#define ForEachBits .L5
#define a0 %A0
#define a1 %A1
#define a2 %A2
#define a3 %A3
#define a4 %A4
#define a5 %A5
#define a6 %A6
#define sp %SP
#define d0 %D0
#define d1 %D1
#define d2 %D2
#define d3 %D3
#define d4 %D4
#define d5 %D5
#define d6 %D6
#define d7 %D7
#else
#define ForEachLine L2
#define ForEachBits L5
#endif
#define CASE_SIZE 5
.text
.even
.globl _cfbStippleStack
_cfbStippleStack:
moveml PushMask,sp@-
movel sp@(arg0),addr
movel sp@(arg1),stipple
movel sp@(arg2),value
movel sp@(arg3),stride
movew sp@(arg4+2),count
movel sp@(arg5),shift
subqw #1,count /* predecrement count */
lea CaseBegin,case
movew #28,lshift
addl shift,lshift
movew #28,rshift
subql #4,shift
negl shift
ForEachLine:
movel addr,atemp
addl stride,addr
movel stipple@+,c
#ifdef TETEXT
jeq NextLine
#endif
/* Get first few bits */
movel c,ctemp
lsrl lshift,ctemp
lsll #CASE_SIZE,ctemp
lsll shift,c /* set up for next bits */
jmp case@(ctemp:l)
ForEachBits:
addl #4,atemp
movel c,ctemp
lsrl rshift,ctemp /* better than lsrl, andi */
lsll #CASE_SIZE,ctemp
lsll #4,c /* set up for next bits */
jmp case@(ctemp:l)
#define Break \
andl c,c ; \
jne ForEachBits ; \
dbra count,ForEachLine ; \
moveml sp@+,PopMask ; \
rts ;
CaseBegin:
jne ForEachBits /* 0 */
NextLine:
dbra count,ForEachLine
moveml sp@+,PopMask
rts
. = CaseBegin + 0x20
moveb value,atemp@(3) /* 1 */
Break
. = CaseBegin + 0x40
moveb value,atemp@(2) /* 2 */
Break
. = CaseBegin + 0x60
movew value,atemp@(2) /* 3 */
Break
. = CaseBegin + 0x80
moveb value,atemp@(1) /* 4 */
Break
. = CaseBegin + 0xa0
moveb value,atemp@(3) /* 5 */
moveb value,atemp@(1)
Break
. = CaseBegin + 0xc0
movew value,atemp@(1) /* 6 */
Break
. = CaseBegin + 0xe0
movew value,atemp@(2) /* 7 */
moveb value,atemp@(1)
Break
. = CaseBegin + 0x100
moveb value,atemp@ /* 8 */
Break
. = CaseBegin + 0x120
moveb value,atemp@(3) /* 9 */
moveb value,atemp@
Break
. = CaseBegin + 0x140
moveb value,atemp@(2) /* a */
moveb value,atemp@
Break
. = CaseBegin + 0x160
movew value,atemp@(2) /* b */
moveb value,atemp@
Break
. = CaseBegin + 0x180
movew value,atemp@ /* c */
Break
. = CaseBegin + 0x1a0
moveb value,atemp@(3) /* d */
movew value,atemp@
Break
. = CaseBegin + 0x1c0
moveb value,atemp@(2) /* e */
movew value,atemp@
Break
. = CaseBegin + 0x1e0
movel value,atemp@ /* f */
Break
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