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Diffstat (limited to 'scaf/system/kernel.scaf')
-rw-r--r-- | scaf/system/kernel.scaf | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/scaf/system/kernel.scaf b/scaf/system/kernel.scaf new file mode 100644 index 0000000..0bc2788 --- /dev/null +++ b/scaf/system/kernel.scaf @@ -0,0 +1,130 @@ +( Pure Data Packet - scaforth kernel. ) +( Copyright (c) by Tom Schouten <pdp@zzz.kotnet.org> ) +( ) +( This program is free software; you can redistribute it and/or modify ) +( it under the terms of the GNU General Public License as published by ) +( the Free Software Foundation; either version 2 of the License, or ) +( [at your option] any later version. ) +( ) +( This program is distributed in the hope that it will be useful, ) +( but WITHOUT ANY WARRANTY; without even the implied warranty of ) +( MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ) +( GNU General Public License for more details. ) +( ) +( You should have received a copy of the GNU General Public License ) +( along with this program; if not, write to the Free Software ) +( Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. ) + + + + + +( this file contains the inline words in the scaforth kernel. ) +( when a file is compiled to asm, it will consist of word ) +( definition asm routines, macros and jmp call ret instructions. ) +( ) +( all words in this file are defined in terms of asm macros ) +( defined in scafmacros.s ) + + + +( stack manip words ) + +: over dup dropover ; + +( neighbourhood cell fetch words ) + +: @-+ dup dropldTL ; +: @0+ dup dropldTM ; +: @++ dup dropldTR ; +: @-0 dup dropldML ; +: @00 dup dropldMM ; +: @+0 dup dropldMR ; +: @-- dup dropldBL ; +: @0- dup dropldBM ; +: @+- dup dropldBR ; + +( boolean logic ) + +: or overor nip ; +: xor overxor nip ; +: and overand nip ; + +( binary constant loading ) + +: 1 dup dropone ; +: 0 dup dropzero ; + +( 4,3,2,1 bit add stack to register, leave carry on stack ) + +: ++++ adb0 adb1 adb2 adb3 ; +: +++ adb0 adb1 adb2 ; +: ++ adb0 adb1 ; +: + adb0 ; + +( 4,3,2 bit shifted 1 add ) + +: ++++<<1 adb1 adb2 adb3 ; +: +++<<1 adb1 adb2 ; +: ++<<1 adb1 ; + +( 4,3 bit shifted 2 add ) + +: ++++<<2 adb2 adb3 ; +: +++<<2 adb2 ; + +( 4 bit shifted 3 add ) + +: ++++<<3 adb3 ; + +( 4 bit accumulator access ) + +: !a0 dupsta0 drop ; +: !a1 dupsta1 drop ; +: !a2 dupsta2 drop ; +: !a3 dupsta3 drop ; + +: @a0 dup droplda0 ; +: @a1 dup droplda1 ; +: @a2 dup droplda2 ; +: @a3 dup droplda3 ; + +( 4,3,2,1 bit accumulator zero tests ) + +: ?anz dup dropisnonzero4 ; +: ?anz4 dup dropisnonzero4 ; +: ?anz3 dup dropisnonzero3 ; +: ?anz2 dup dropisnonzero2 ; +: ?anz1 dup dropisnonzero1 ; + +( load constants into accumulator ) + +: a0 a0000 ; +: a-0 a0000 ; +: a+0 a0000 ; +: a+1 a0001 ; +: a+2 a0010 ; +: a+3 a0011 ; +: a+4 a0100 ; +: a+5 a0101 ; +: a+6 a0110 ; +: a+7 a0111 ; + +: a+8 a1000 ; +: a+9 a1001 ; +: a+10 a1010 ; +: a+11 a1011 ; +: a+12 a1100 ; +: a+13 a1101 ; +: a+14 a1110 ; +: a+15 a1111 ; + +: a-8 a1000 ; +: a-7 a1001 ; +: a-6 a1010 ; +: a-5 a1011 ; +: a-4 a1100 ; +: a-3 a1101 ; +: a-2 a1110 ; +: a-1 a1111 ; + |