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- /*
- * $XConsortium: stip68kgnu.h,v 1.1 91/02/23 12:43:35 rws Exp $
- *
- * Copyright 1990 Massachusetts Institute of Technology
- *
- * 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, and that the name of M.I.T. not be used in advertising or
- * publicity pertaining to distribution of the software without specific,
- * written prior permission. M.I.T. makes no representations about the
- * suitability of this software for any purpose. It is provided "as is"
- * without express or implied warranty.
- *
- * M.I.T. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL M.I.T.
- * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
- * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
- * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- *
- * Author: Keith Packard, MIT X Consortium
- */
-
- /*
- * Stipple stack macro for 68k GCC
- *
- * Note - this macro can nott describe the full extent of the
- * modifications made to the arguments (GCC does not allow enough
- * arguments to __asm statements). Therefore, it is possible
- * (though unlikely) that future magic versions of GCC may
- * miscompile this somehow. In particular, (stipple) is modified
- * by the macro, yet not listed as an output value.
- */
-
- #define STIPPLE(addr,stipple,value,width,count,shift) \
- __asm volatile ( \
- "subqw #1,%1\n\
- lea 0f,a1\n\
- movew #28,d2\n\
- addl %7,d2\n\
- movew #28,d3\n\
- subql #4,%7\n\
- negl %7\n\
- 1:\n\
- movel %0,a0\n\
- addl %5,%0\n\
- movel %3@+,d1\n\
- beq 3f\n\
- movel d1,d0\n\
- lsrl d2,d0\n\
- lsll #5,d0\n\
- lsll %7,d1\n\
- jmp a1@(d0:l)\n\
- 2:\n\
- addl #4,a0\n\
- movel d1,d0\n\
- lsrl d3,d0\n\
- lsll #5,d0\n\
- lsll #4,d1\n\
- jmp a1@(d0:l)\n\
- 0:\n\
- bne 2b ; dbra %1,1b ; bra 4f\n\
- . = 0b + 0x20\n\
- moveb %4,a0@(3)\n\
- andl d1,d1 ; bne 2b ; dbra %1,1b ; bra 4f\n\
- . = 0b + 0x40\n\
- moveb %4,a0@(2)\n\
- andl d1,d1 ; bne 2b ; dbra %1,1b ; bra 4f\n\
- . = 0b + 0x60\n\
- movew %4,a0@(2)\n\
- andl d1,d1 ; bne 2b ; dbra %1,1b ; bra 4f\n\
- . = 0b + 0x80\n\
- moveb %4,a0@(1)\n\
- andl d1,d1 ; bne 2b ; dbra %1,1b ; bra 4f ;\n\
- . = 0b + 0xa0\n\
- moveb %4,a0@(3) ; moveb %4,a0@(1)\n\
- andl d1,d1 ; bne 2b ; dbra %1,1b ; bra 4f ;\n\
- . = 0b + 0xc0\n\
- movew %4,a0@(1)\n\
- andl d1,d1 ; bne 2b ; dbra %1,1b ; bra 4f ;\n\
- . = 0b + 0xe0\n\
- movew %4,a0@(2) ; moveb %4,a0@(1)\n\
- andl d1,d1 ; bne 2b ; dbra %1,1b ; bra 4f ;\n\
- . = 0b + 0x100\n\
- moveb %4,a0@(0)\n\
- andl d1,d1 ; bne 2b ; dbra %1,1b ; bra 4f ;\n\
- . = 0b + 0x120\n\
- moveb %4,a0@(3) ; moveb %4,a0@(0)\n\
- andl d1,d1 ; bne 2b ; dbra %1,1b ; bra 4f ;\n\
- . = 0b + 0x140\n\
- moveb %4,a0@(2) ; moveb %4,a0@(0)\n\
- andl d1,d1 ; bne 2b ; dbra %1,1b ; bra 4f ;\n\
- . = 0b + 0x160\n\
- movew %4,a0@(2) ; moveb %4,a0@(0)\n\
- andl d1,d1 ; bne 2b ; dbra %1,1b ; bra 4f ;\n\
- . = 0b + 0x180\n\
- movew %4,a0@(0)\n\
- andl d1,d1 ; bne 2b ; dbra %1,1b ; bra 4f ;\n\
- . = 0b + 0x1a0\n\
- moveb %4,a0@(3) ; movew %4,a0@(0)\n\
- andl d1,d1 ; bne 2b ; dbra %1,1b ; bra 4f ;\n\
- . = 0b + 0x1c0\n\
- moveb %4,a0@(2) ; movew %4,a0@(0)\n\
- andl d1,d1 ; bne 2b ; dbra %1,1b ; bra 4f ;\n\
- . = 0b + 0x1e0\n\
- movel %4,a0@(0)\n\
- andl d1,d1 ; bne 2b ; \n\
- 3: dbra %1,1b ; \n\
- 4:\n"\
- : "=a" (addr), /* %0 */ \
- "=d" (count) /* %1 */ \
- : "0" (addr), /* %2 */ \
- "a" (stipple), /* %3 */ \
- "d" (value), /* %4 */ \
- "a" (width), /* %5 */ \
- "1" (count), /* %6 */ \
- "d" (shift) /* %7 */ \
- : /* ctemp */ "d0", \
- /* c */ "d1", \
- /* lshift */ "d2", \
- /* rshift */ "d3", \
- /* atemp */ "a0", \
- /* case */ "a1")
-