:Title[LISPDEFS.mc];
*
* Edit History
* February 2, 1984 9:53 AM, JonL, let CallUFN also do SaveLink← Link
* January 19, 1984 8:53 PM, JonL, added PS.INBLT flag
* January 13, 1984 11:25 PM, JonL, RME’s for Fvar lookup, new RAM number
* January 9, 1984 9:17 PM, JonL, moved "DebugEachInst" conditional stuff
*to under "Debugging".
* January 3, 1984 9:20 PM, JonL, added both "switched" GC punt names,
*so this file can server both pre Dec 15 and Post Jan 3 files
* December 31, 1983 1:20 PM, JonL, CallUFN only branches to ufnPC,
*for simpler usage; added RM defs for SignQR and SaveLink
* December 30, 1983 1:16 PM, JonL, Added NotReduced flag, and signBit constant
* December 20, 1983 8:54 AM, JonL, renamed AT.GCMAPTABLE and AT.HANDLEOVERFLOW
*and added rme’s for CELLHINUM, CELLLONUM
* November 9, 1983 4:18 PM, JonL, updated RamVersion number
*
:insert[LParams.mc];
set[Debugging, 0];* 0 means NOT debugging, 1 means debugging
set[BreakPoints, 0];* debugging with midas
set[FNStats, sub[1,Debugging]];* can gather function stats unless debugging
set[UPCStats, sub[1,Debugging]];* cant gather microcode pc stats if debugging
set[Reduced,0];* reduced instruction set

*set[NOFLOATING, add[Reduced, Debugging]];
set[NOFLOATING, 0];
set[NOBIN, Reduced];
set[NOCREATECELL, Reduced];
set[NORPLACS, Reduced];
set[NotReduced, sub[1,Reduced]];
*--------------------------------------------------------------------
* version numbers - VERSION PILOTBITBLT + 0
*--------------------------------------------------------------------
set[RamVersion, add[12004, Debugging]];
* version number (+ 1 if debugging)
* fix StampD1uCode.cm when these change
set[RamMinBcplVersion, 21000];
set[RamMinLispVersion, 110400];


* check against values imported from LPARAMS.dmc

IFG[MinRamVersion!,RamVersion,ER[RamVersionTooLow]];
IFG[MinBcplVersion!,RamMinBcplVersion,set[RamMinBcplVersion,MinBcplVersion!]];
IFG[RamMinLispVersion, LispVersion!, ER[LispVersionTooLow]];

*--------------------------------------------------------------------
* RM regions
*--------------------------------------------------------------------
SetRMRegion[RMForIFU];*Lisp Emulator Registers

rvn[ESP];* 0next stack block
rvn[FNStatsPtr];* 1pointer to fn stat buffer
rvn[AllOnes];* 2 always -1 (not used much)
rvn[PSTATE];* 3
rvn[NARGS];* 4#args
rvn[DEFHI];* 5virtual address of function called
rvn[DEFLO];* 6
rvn[TSP];* 7pointer to next available stack region
rvn[IVAR];* 10pointer to current IVAR area
rvn[LEFT];* 11number of (double words) of stack left
rvn[PVAR];* 12pointer to current PVAR area
rvn[LTEMP4];* 13
rvn[LTEMP3];* 14
rvn[LTEMP2];* 15
rvn[LTEMP1];* 16= DivTemp2 in DivSub from AEmu code
rvn[LTEMP0];* 17= MulTemp, DivTemp1

rme[DivTemp1, LTEMP0];

* for GC

rme[PROBE, NARGS];
rme[CASE, DEFHI];
rme[ENTRY, DEFLO];

* for CREATECELL

rme[CELLHINUM, DEFHI];
rme[CELLLONUM, DEFLO];

* for Free Variable lookup
rme[FVEP, LTEMP1];
rme[FVNAME, LTEMP2];
rme[FVTMP, LTEMP3];
rme[FVCHAIN, LTEMP4];
rme[FVINDEX, NARGS];
rme[FVHI, DEFHI];
rme[FVLO, DEFLO];

* for numerical routines

rme[SignQR, DEFLO];* Remembers the Sign of result in Mul and Div usages
rme[SaveLink, DEFHI]; * unboxing subroutines need to save link over call

SetRMRegion[Region14];
RVN[InstCount];
RVN[InstBreak];
RVN[RANDNUM];

* REGISTER CONVENTIONS:
* at "safe" points (i.e., after every opcode, whenever a page fault
* can occur, and whenever a punt can occur,
* the following conventions
* hold:

* IVAR points to first IVAR word in basic frame
* PVAR points to first PVAR word in frame extension
* TSP points to the left word of the next slot in the current stack
* ESP points to the first (left) word of the next stack block
* (i.e., tsp1+1 = esp means stack is empty)
* PSTATE is 0 normally: -1 means in call,
*If debugging, 1 means PCX is invalid,
*2 means that a page fault is ok

mc[PS.HTCNTFULL, 20];
mc[PS.HTOVERFLOW, 10];
mc[PS.INBCPL, 4];
mc[PS.PFOK, 2];
mc[PS.PCXBAD, 1];
mc[PS.INBITBLT, 40];
mc[PS.INBLT, 100];

* In addition, between opcodes,
* Left = (((ESP)-(TSP)) rsh 1) - LeftOffset;

mc[LeftOffset, 10];
mc[MyFrameOffset, 100];

mc[BfPadded, 400];
mc[BfResidual, 1000];

mc[FXFastReturn, 4000];
mc[FXInCall, 2000];
mc[FXNTValid, 1000];
mc[FXNoPushReturn, 400];

* FX Fields:
mc[FX.BFLAGS, -2];
mc[FX.IVAR, -1];
mc[FX.FLAGS, 0];
mc[FX.ALINK, 1];
mc[FX.DEFLO, 2];
mc[FX.DEFHI, 3];
mc[FX.NEXT, 4];
mc[FX.PC, 5];
mc[FX.NTLO, 6];
mc[FX.NTHI, 7];
mc[FX.BLINK, 10];
mc[FX.CLINK, 11];
mc[FX.PVAR, 12];
m[FXDIF, sub[FX.#1!, FX.#2!]c];
m[FXBACK, sub[FX.PVAR!, FX.#1!]c];

* FNHEADER fields
mc[FNH.STK, 0];
mc[FNH.NA, 1];
mc[FNH.PV, 2];
mc[FNH.START, 3];
mc[FNH.NTSIZE, 6];
mc[FNH.NLFV, 7];
mc[FNH.FIRSTNAME, 10];

* DTD fields

mc[DTD.NAME, 0];
mc[DTD.SIZE, 1];
mc[DTD.FREE, 2];
mc[DTD.COUNTER, 14];
mc[DTD.NEXTPAGE, 15];

*--------------------------------------------------------------------
* Base Registers
*--------------------------------------------------------------------
brx[StackBR, 0];* beginning of stack
brx[StackM2BR, 1];* StackBR-2
brx[ScratchLZBR, 2];* BrLo= 0
*brx[unused, 3];*

br[DefBR, 4];* beginning of Def space
br[dtdBR, 5];* pointer to DTD space
br[ufnBR, 6];* UFN table
br[ListpDTDBR, 7];* pointer to LISTP’s DTD
br[tybaseBR, 10];* MDS type table
br[ZeroBR, 11];* always zero
br[interfaceBR, 12];* points to interface page
br[BBTableBR, 13];* pointer to bitblt table
*br[, 14];* unused
*br[, 15];* unused

* the following must be an even-odd pair

br[htMainBR, 16];* GC main reference count table
br[htOfloBR, 17];* GC overflow table


*br[AChannelBR, 20];
*br[TChannelBR, 21];

*br[BBDstBR, 22];* BitBlt destination base register
*br[BBSrcBR, 23];* BitBlt source base register

*br[BChannelBR, 24];* used by display

*br[Page1BR, 25];* {mds, 400b},
*br[ScratchBR, 26];* general-purpose scratch register
*br[PCHistBR, 27];

*br[DiskBR, 30];* Disk task base register
*br[ECBR, 31];* Ethernet Command base register
*br[EIBR, 32];* Ethernet Input base register
*br[EOBR, 33];* Ethernet Output base register

br[LScratchBR, 34];* Lisp scratch register
br[ValSpaceBR, 35];* point to value space
br[MDS, 36];* {mds, 0} for Alto and Mesa
br[ifuBR, 37];* code base (used by IFU)

*--------------------------------------------------------------------
* Various constants
*--------------------------------------------------------------------

* RESERVED ATOM NUMBERS

mc[AT.NIL, 0];
mc[AT.NOBIND, 1];
mc[AT.T, 114];
mc[AT.EVALFORM, 370];
mc[AT.GCMAPTABLE, 377];
mc[AT.MAKENUMBER, 374];
mc[AT.SETFVAR, 376];
mc[AT.HANDLEOVERFLOW, 371];
mc[AT.INTERPRETER, 400];
mc[AT.MAKEFLOAT, 401];

* for GC

mc[htStkCnt, add[htstkbit!, htcntmask!]];
mc[AT.GCSCAN, 371];* Former "switched" meaning
mc[AT.GCOVERFLOW, 377];* Former "switched" meaning

* number spaces:
mc[SmallHi, smallpl!];
mc[SmallNegHi, smallneg!];


* other random things
mc[MaxConsCount, 10000];
mc[StackEmpty, 0];* Stkp for Stack Empty

mc[signBit, 100000];
mc[rhmask, 377];
mc[lhmask, 177400];

* bcpl communication area

mc[StatsBufferPtr, 200];
mc[StatsBufferBoundary, 1400];
mc[AemuRestartLoc, 206];
mc[SubrArgArea, 210];

mc[CALL.EVENT, 140000];* hi pointer for a fn call
mc[RETURN.EVENT, 177400];* hi pointer for a return
*--------------------------------------------------------------------
* IFU definitions
*--------------------------------------------------------------------


:if[Debugging];
m[NextOpCode, Branch[NextOp]];* go check PSTATE
m[PAGEFAULTOK, PSTATE← (PSTATE) or (PS.PFOK)];
m[PAGEFAULTNOTOK, PSTATE← (PSTATE) and (not[PS.PFOK!]c)];
m[PCXBAD, PSTATE← (PSTATE) or (PS.PCXBAD)];
m[CHECKPCX, Call[CHECKPCXSUBR]];
:else;
m[NextOpCode, IFUjump[0]];* dispatch to next instruction
m[PAGEFAULTOK,];
m[PAGEFAULTNOTOK,];
m[PCXBAD,];
m[CHECKPCX,];
:endif;

mc[NoNdata, 17];* no encoded data in IFU
m[regOP1, ifuREG[#1, 1, #2, 0, #3, #4, 0, 0]];* reg. 1 byte
m[regOP2, ifuREG[#1, 2, #2, 0, #3, #4, 0, 0]];* reg. 2 byte
m[regOP3, ifuREG[#1, 3, #2, 0, #3, #4, 0, 0]];* reg. 3 byte

* ufn opcode - no microcode
M[UfnOps, IFUpause[#1, 1, ifuBR, 0, opUFN, NoNData, 0, 0]];

Set[LispInsSet, 1];

M[CallUFN, (SaveLink← Link, Branch[ufnPC])];

:if[breakpoints];
M[StackCheck, (Breakpoint) (RESCHEDULE)];
M[UCodeCheck, (Breakpoint) Branch[UCODECHECKPUNT]];

:else;
M[StackCheck, RESCHEDULE];
M[UCodeCheck, (SaveLink← Link, Branch[UCODECHECKPUNT])];

:endif;