%
% This code may be used and modified, and redistributed in binary
% or source form, subject to the "CCL Public License", which should
% accompany it. This license is a variant on the BSD license, and thus
% permits use of code derived from this in either open and commercial
% projects: but it does require that updates to this code be made
% available back to the originators of the package. Note that as with
% any BSD-style licenses the terms here are not compatible with the GNU
% public license, and so GPL code should not be combined with the material
% here in any way.
%
s!:opcodelist := '(
LOADLOC % general opcode to load from the stack
LOADLOC0 LOADLOC1 LOADLOC2 LOADLOC3 % specific offsets
LOADLOC4 LOADLOC5 LOADLOC6 LOADLOC7
LOADLOC8 LOADLOC9 LOADLOC10 LOADLOC11
% combinations to load two values (especially common cases)
LOC0LOC1 LOC1LOC2 LOC2LOC3
LOC1LOC0 LOC2LOC1 LOC3LOC2
VNIL % load the value NIL
LOADLIT % load a literal from the literal vector
LOADLIT1 LOADLIT2 LOADLIT3 % specific offsets
LOADLIT4 LOADLIT5 LOADLIT6 LOADLIT7
LOADFREE % load value of a free (FLUID/SPECIAL) variable
LOADFREE1 LOADFREE2 LOADFREE3 % specific offsets
LOADFREE4
STORELOC % Store onto stack
STORELOC0 STORELOC1 STORELOC2 STORELOC3 % specific offsets
STORELOC4 STORELOC5 STORELOC6 STORELOC7
STOREFREE % Set value of FLUID/SPECIAL variable
STOREFREE1 STOREFREE2 STOREFREE3
LOADLEX % access to non-local lexical variables (for Common Lisp)
STORELEX
CLOSURE
% Code to access local variables and also take CAR or CDR
CARLOC0 CARLOC1 CARLOC2 CARLOC3
CARLOC4 CARLOC5 CARLOC6 CARLOC7
CARLOC8 CARLOC9 CARLOC10 CARLOC11
CDRLOC0 CDRLOC1 CDRLOC2 CDRLOC3
CDRLOC4 CDRLOC5
CAARLOC0 CAARLOC1 CAARLOC2 CAARLOC3
% Function call support
CALL0 CALL1 CALL2 CALL2R CALL3 CALLN
CALL0_0 CALL0_1 CALL0_2 CALL0_3
CALL1_0 CALL1_1 CALL1_2 CALL1_3 CALL1_4 CALL1_5
CALL2_0 CALL2_1 CALL2_2 CALL2_3 CALL2_4
BUILTIN0 BUILTIN1 BUILTIN2 BUILTIN2R BUILTIN3
APPLY1 APPLY2 APPLY3 APPLY4
JCALL JCALLN
% Branches. The main collection come in variants with long or short
% offsets and with the branch to go fowards or backwards.
JUMP JUMP_B JUMP_L JUMP_BL
JUMPNIL JUMPNIL_B JUMPNIL_L JUMPNIL_BL
JUMPT JUMPT_B JUMPT_L JUMPT_BL
JUMPATOM JUMPATOM_B JUMPATOM_L JUMPATOM_BL
JUMPNATOM JUMPNATOM_B JUMPNATOM_L JUMPNATOM_BL
JUMPEQ JUMPEQ_B JUMPEQ_L JUMPEQ_BL
JUMPNE JUMPNE_B JUMPNE_L JUMPNE_BL
JUMPEQUAL JUMPEQUAL_B JUMPEQUAL_L JUMPEQUAL_BL
JUMPNEQUAL JUMPNEQUAL_B JUMPNEQUAL_L JUMPNEQUAL_BL
% The following jumps go forwards only, and by only short offsets. They
% are provided to support a collection of common special cases
% (a) test local variables for NIl or TRUE
JUMPL0NIL JUMPL0T JUMPL1NIL JUMPL1T
JUMPL2NIL JUMPL2T JUMPL3NIL JUMPL3T
JUMPL4NIL JUMPL4T
% (b) store in a local variable and test for NIL or TRUE
JUMPST0NIL JUMPST0T JUMPST1NIL JUMPST1T
JUMPST2NIL JUMPST2T
% (c) test if local variable is atomic or not
JUMPL0ATOM JUMPL0NATOM JUMPL1ATOM JUMPL1NATOM
JUMPL2ATOM JUMPL2NATOM JUMPL3ATOM JUMPL3NATOM
% (d) test free variable for NIL or TRUE
JUMPFREE1NIL JUMPFREE1T JUMPFREE2NIL JUMPFREE2T
JUMPFREE3NIL JUMPFREE3T JUMPFREE4NIL JUMPFREE4T
JUMPFREENIL JUMPFREET
% (e) test for equality (EQ) against literal value
JUMPLIT1EQ JUMPLIT1NE JUMPLIT2EQ JUMPLIT2NE
JUMPLIT3EQ JUMPLIT3NE JUMPLIT4EQ JUMPLIT4NE
JUMPLITEQ JUMPLITNE
% (f) call built-in one-arg function and use that as a predicate
JUMPB1NIL JUMPB1T JUMPB2NIL JUMPB2T
% (g) flagp with a literal tag
JUMPFLAGP JUMPNFLAGP
% (h) EQCAR test against literal
JUMPEQCAR JUMPNEQCAR
% CATCH needs something that behaves a bit like a (general) jump.
CATCH CATCH_B CATCH_L CATCH_BL
% After a CATCH the stack (etc) needs restoring
UNCATCH THROW PROTECT UNPROTECT
PVBIND PVRESTORE % PROGV support
FREEBIND FREERSTR % Bind/restore FLUID/SPECIAL variables
% Exiting from a procedure, optionally popping the stack a bit
EXIT NILEXIT LOC0EXIT LOC1EXIT LOC2EXIT
% General stack management
PUSH PUSHNIL PUSHNIL2 PUSHNIL3 PUSHNILS
POP LOSE LOSE2 LOSE3 LOSES
% Exchange A and B registers
SWOP
% Various especially havily used Lisp functions
EQ EQCAR EQUAL NUMBERP
CAR CDR CAAR CADR CDAR CDDR
CONS NCONS XCONS ACONS LENGTH
LIST2 LIST2STAR LIST3
PLUS2 ADD1 DIFFERENCE SUB1 TIMES2
GREATERP LESSP
FLAGP GET LITGET
GETV QGETV QGETVN
% Support for over-large stack-frames (LOADLOC/STORELOC + lexical access)
BIGSTACK
% Support for CALLs where the literal vector has become huge
BIGCALL
% An integer-based SWITCH or CASE statement has special support
ICASE
% Speed-up support for compiled GET and FLAGP when tag is important
FASTGET
% Opcodes that have not yet been allocated.
SPARE1
SPARE2
)$
if demo!-mode() then <<
% Shuffle opcodes! This is to make a demo-mode image incompatible
% with the release version!
p := s!:opcodelist;
for j := 0:254 do <<
n := random!-number(256-j);
q := p;
for k := 1:n do q := cdr q;
w := car p; rplaca(p, car q); rplaca(q, w);
p := cdr p >> >>;
end;