COMMENT ⊗   VALID 00002 PAGES
C REC  PAGE   DESCRIPTION
C00001 00001
C00002 00002	.SBTTL	Table of interpreter instructions
C00009 ENDMK
C⊗;
.SBTTL	Table of interpreter instructions

COMMENT  ⊗
This table is parallel to the file INTDEF.SAI[H,RF].  It is required
at several places in the interpreter; each of these can define the
macro MAKEOP however desired.  The convention here for types of
arguments that each pseudo-op takes is this:
	a	absolute address
	la	list of absolute addresses
	o	offset or level-offset pair
	lo	list of offsets or level-offset pairs
	n	small constant
⊗

	II == 2		;Start of interpreter jump table (0 is illegal instruction)

	;Motion control
MAKEOP	XMOVE,MOVE,<a>	;Prepare, execute move whose traj table is at a.

	;Variables
MAKEOP	XMVAR,MVAR,<lo>	;Make graph node for given offsets (list arg)
MAKEOP	XKVAR,KVAR,<lo>	;Kill graph node at given offsets (list arg)
MAKEOP	XMAKEVT,MAKEVT,<lo>	;Make event variables with offsets as in list.
MAKEOP	XDESEVT,DESEVT,<lo>	;Kill event variables with offsets as in list.
MAKEOP	XMCLC,MCLC,<o,a,lo>	;Make a calculator for variable at level-offset o
			; at address a, with needed list lo.
MAKEOP	XMCHG,MCHG,<o,a>;Make a changer for variable at level-offset o at address a.
MAKEOP	XGTOLD,GTOLD	;Get the old value for current changer.
MAKEOP	XGTNEW,GTNEW	;Get the new value for current changer.

	;Stack operations
MAKEOP	XGTVAL,GTVAL,<o>;Push value of arg (level-offset pair).
MAKEOP	XIGTVAL,IGTVAL,<a>	;Push arg (immediate).
MAKEOP  XCHNGE,CHNGE,<o>;Pop value into arg (level-offset pair).
MAKEOP  XICHNGE,ICHNGE,<a>;Pop value into arg (immediate).
MAKEOP	XPUSH, PUSH,<a>	;Push arg directly (as a ptr) onto stack. For cnstnts.
MAKEOP	XPOP,  POP	;Pop stack.
MAKEOP	XCOPY, COPY ,<n>;Copy n'th down to top of stack.
MAKEOP	XREPLAC,REPLAC,<n>	;Replace n'th down with top (which pop)
MAKEOP	XFLUSH,FLUSH	;Flush the entire stack.

	;Flow of control
MAKEOP	XJUMP, JUMP, <a>;Jump to address
MAKEOP	XJUMPC,JUMPC,<n,a>	;Jump to address only if condition "n" on top 
MAKEOP	XTERMINATE,TERMINATE	;Terminate this interpreter
MAKEOP	XENDCLC,ENDCLC		;Return from calculator cell
MAKEOP  XPROC, PROC,<a,lo>	;Call a procedure at a, with arg list lo 
MAKEOP	XRETURN,RETURN	;Return from procedure
MAKEOP	XSPROUT,SPROUT;la	;Sprout interpreters at each arg, wait (list arg)
MAKEOP	XFORCHK,FORCHK,<a>	;Do a FOR-loop check, and fail to location d.
MAKEOP	XSIGNAL,SIGNAL,<o>	;Signal event at level-offset o.
MAKEOP	XWAITE,WAITE,<o>	;Wait on event at level-offset o.

	;Arithmetic
MAKEOP	XSADD, SADD	;S+S:  Add top two elts, pop, pop, push answer
MAKEOP	XSSUB, SSUB	;S-S:  Sub top two elts, pop, pop, push answer
MAKEOP	XSNEG, SNEG	;-S:   Negate top elt, pop, push answer
MAKEOP	XSMUL, SMUL	;S*S:  Mul top two elts, pop, pop, push answer
MAKEOP	XSDIV, SDIV	;S/S:  Div top two elts, pop, pop, push answer
MAKEOP	XVMAGN, VMAGN	;S ← norm of vector
MAKEOP	XVDOT, VDOT	;S ← vector dot vector
MAKEOP	XPVDOT,PVDOT	;S ← vector dot vector all 4 cells
MAKEOP	XVMAKE,VMAKE	;V ← vector(scalar,scalar,scalar)
MAKEOP	XSVMUL,SVMUL	;V ← scalar * vector
MAKEOP	XVADD, VADD	;V ← vector + vector
	;UNITV remove	;Vector ← vector / its norm
	;CROSV remove	;Vector ← vector cross vector
MAKEOP	XTVMUL,TVMUL	;Vector ← trans * vector
	;AXWR		;T ← rotation(v,v)
MAKEOP	XTMAKE,TMAKE	;T ← trans(rot,vector)
MAKEOP	XTVADD,TVADD	;T ← t + v
	;FTOF
MAKEOP	XTTMUL,TTMUL	;T ← trans * trans
	;TINVRT

	;Condition monitors
MAKEOP	XCMMAK,CMMAK,<o>;Make a c-m at offset o
MAKEOP	XCMENBL,CMENBL,<o>	;Enable c-m at level-offset o
MAKEOP	XCMDSBL,CMDSBL,<o>	;Disable c-m at level-offset o
MAKEOP	XCMDEST,CMDEST,<lo>	;Destroy c-m at offset lo (list arg)
MAKEOP	XCMTRIG,CMTRIG	;Trigger the c-m body (use only in checker)
MAKEOP	XCMSKED,CMSKED	;Sleep for a while (use only in checker)
MAKEOP	XCMUNCR,CMUNCR	;Start uncritical section
MAKEOP	XCMBWT,CMBWT	;Wait for trigger (use only in body)

	;Debugging aids
MAKEOP	XPRINT,PRINT	;Type an ASCIZ string on the VT05.
MAKEOP	XPRNTS,PRNTS	;Type an scalar value, which pop, on the VT05.
MAKEOP	XVALPRN,VALPRN	;Type a value, whatever type it is, and pop it.
MAKEOP	XVARPRN,VARPRN,<o>	;Type a variable (level-offset), whatever type.
MAKEOP	XBRACE,NOOP	;Bracepoint in the program (break or trace)
MAKEOP	XNOOP,NOOP	;Null operation
MAKEOP	XTOPAL,TOPAL	;Escape to PAL