DIRECTORY
CedarMicrocode,
ListerUtils,
OpDebug,
RESInterpreter,
PrincOps;

RESIDisp: CEDAR PROGRAM 
IMPORTS CedarMicrocode, OpDebug, RI: RESInterpreter 
EXPORTS RESInterpreter = {
OPEN PrincOps;
Value: TYPE = RI.Value;
DValue: TYPE = RI.DValue; 
Ptr1: TYPE = RI.Ptr1;
Ptr2: TYPE = RI.Ptr2;
LPtr1: TYPE = RI.LPtr1;
LPtr2: TYPE = RI.LPtr2;
LCB: TYPE = RI.LCB;

Machine: TYPE = RI.Machine;

Byte: TYPE = RI.Byte;
Bytes: TYPE = RI.Bytes;
Pair: TYPE = RI.Pair;
FieldDescriptor: TYPE = PrincOps.FieldDescriptor;

StrangeCode: PUBLIC SIGNAL = CODE;


Execute: PUBLIC PROC [m: Machine] = TRUSTED {
hist: RI.OpHistory;
opData: ListerUtils.OpCodeArray;
IF m.traceOps THEN {
hist _ m.history;
opData _ OpDebug.OpData[]};
DO
savedPc: CARDINAL = m.pc;
op: Byte;
op _ RI.NextOpByte[m, TRUE];
IF m.countOps THEN m.opCount[op] _ m.opCount[op] + 1;
m.iCount _ m.iCount + 1;

IF m.traceOps THEN {
cb: LONG POINTER TO PACKED ARRAY [0..0) OF Byte = m.cb;
hi: RI.OpHistoryItem;
hi _ [pc: savedPc, gf: m.g, stkDepth: m.sd, stk: NULL, op: [op,0,0]];
FOR j: CARDINAL IN [0..m.sd) DO
hi.stk[j] _ m.stack[j];
ENDLOOP;
IF opData # NIL THEN SELECT opData[op].length FROM
2 => hi.op[1] _ cb[savedPc+1];
3 => {hi.op[2] _ cb[savedPc+2]; hi.op[1] _ cb[savedPc+1]};
ENDCASE;
hist.data[hist.tail] _ hi;
hist.tail _ (hist.tail+1) MOD RI.OpHistorySize;
IF hist.tail = hist.head THEN hist.head _ (hist.head+1) MOD RI.OpHistorySize};

SELECT op FROM
zLI0, zLI1, zLI2, zLI3, zLI4, zLI5, zLI6 => {RI.Push[m, RI.VCard[op - zLI0]]};
zLIB => {RI.Push[m, RI.VCard[RI.NextOpByte[m]]]};
zLGDB => {
n: CARDINAL _ RI.NextOpByte[m];
RI.Push2[m, RI.ReadDouble[m, LOOPHOLE[LONG[m.g+n]]]]};
zRFL => {
p: LPtr1 _ RI.LPtr1V[RI.Pop2[m]];
n: CARDINAL = RI.NextOpByte[m];
fd: FieldDescriptor _ LOOPHOLE[RI.NextOpByte[m]];
RI.Push[m, RI.ReadField[m, p+n, fd]]};
zRILPL => {
pr: Pair _ LOOPHOLE[RI.NextOpByte[m]];
p: LPtr1;
RI.DoubleReadLocal[m, PrincOps.localbase+pr.p1];
p _ RI.LPtr1V[LOOPHOLE[(m.l+PrincOps.localbase+pr.p1), Ptr2]^];
RI.Push[m, RI.Read[m, p+pr.p2]]};

zNOOP, zME, zMRE, zMXW, zMXD, zNOTIFY, zBCAST, zREQUEUE => 
RI.DoMonitorOps[m, op];
zLL0, zLL1, zLL2, zLL3, zLL4, zLL5, zLL6, zLL7 => {
n: CARDINAL _ op - zLL0;
p: POINTER TO Value = m.l+PrincOps.localbase+n;
RI.ReadLocal[m, n];
RI.Push[m, p^]};
zLLB => {
n: CARDINAL _ RI.NextOpByte[m];
p: POINTER TO Value = m.l+n;
RI.ReadLocal[m, n];
RI.Push[m, p^]};
zLLDB => {
n: CARDINAL _ RI.NextOpByte[m];
p: POINTER TO DValue = LOOPHOLE[m.l+n];
RI.DoubleReadLocal[m, n];
RI.Push2[m, p^]};
zSL0, zSL1, zSL2, zSL3, zSL4, zSL5, zSL6, zSL7 => {
n: CARDINAL _ op - zSL0;
p: POINTER TO Value = m.l+PrincOps.localbase+n;
RI.StoreLocal[m, n];
p^ _ RI.Pop[m]};
zSLB => {
n: CARDINAL _ RI.NextOpByte[m];
p: POINTER TO Value = m.l+n;
RI.StoreLocal[m, n];
p^ _ RI.Pop[m]};
zSLDB => {
n: CARDINAL _ RI.NextOpByte[m];
p: POINTER TO DValue = LOOPHOLE[m.l+n];
RI.DoubleStoreLocal[m, n];
p^ _ RI.Pop2[m]};
zPL0, zPL1, zPL2, zPL3 => {
n: CARDINAL _ op - zPL0;
p: POINTER TO Value = m.l+PrincOps.localbase+n;
RI.StoreLocal[m, n];
p^ _ RI.Top[m]};
zLG0, zLG1, zLG2, zLG3, zLG4, zLG5, zLG6, zLG7, zLGB, zLGDB, zSG0, zSG1, zSG2, zSG3, zSGB, zSGDB => 
RI.DoGlobalOps[m, op];
zLI0, zLI1, zLI2, zLI3, zLI4, zLI5, zLI6, zLIN1, zLINI, zLIB, zLIW, zLCO, zLINB, zLADRB, zGADRB => 
RI.DoLiteralOps[m, op];
zR0, zR1, zR2, zR3, zR4, zRB, zRBL, zRD0, zRDB, zRDBL, zRF, zRFL => 
RI.DoReadOps[m, op];
zWCDBL, zICDBL, zW0, zW1, zW2, zWB, zWBL, zWD0, zWDB, zWDBL, zWF, zWFL => 
RI.DoWriteOps[m, op];
zRSTR => {
n: CARDINAL _ RI.NextOpByte[m];
i: CARDINAL _ RI.CardV[RI.Pop[m]];
p: Ptr1 _ RI.Ptr1V[RI.Pop[m]];
fd: FieldDescriptor _ 
IF (n+i) MOD 2 = 0 THEN [offset: 0, posn: 0, size: 8]
ELSE [offset: 0, posn: 8, size: 8];
RI.Push[m, RI.ReadField[m, LONG[p+(n+i)/2], fd]]};
zWSTR => {
n: CARDINAL _ RI.NextOpByte[m];
i: CARDINAL _ RI.CardV[RI.Pop[m]];
p: Ptr1 _ RI.Ptr1V[RI.Pop[m]];
v: Value _ RI.Pop[m];
fd: FieldDescriptor _ 
IF (n+i) MOD 2 = 0 THEN [offset: 0, posn: 0, size: 8]
ELSE [offset: 0, posn: 8, size: 8];
RI.WriteField[m, LONG[p+(n+i)/2], fd, v]};
zRSTRL => {
n: CARDINAL _ RI.NextOpByte[m];
i: CARDINAL _ RI.CardV[RI.Pop[m]];
p: LPtr1 _ RI.LPtr1V[RI.Pop2[m]];
fd: FieldDescriptor _ 
IF (n+i) MOD 2 = 0 THEN [offset: 0, posn: 0, size: 8]
ELSE [offset: 0, posn: 8, size: 8];
RI.Push[m, RI.ReadField[m, p+(n+i)/2, fd]]};
zWSTRL => {
n: CARDINAL _ RI.NextOpByte[m];
i: CARDINAL _ RI.CardV[RI.Pop[m]];
p: LPtr1 _ RI.LPtr1V[RI.Pop2[m]];
v: Value _ RI.Pop[m];
fd: FieldDescriptor _ 
IF (n+i) MOD 2 = 0 THEN [offset: 0, posn: 0, size: 8]
ELSE [offset: 0, posn: 8, size: 8];
RI.WriteField[m, p+(n+i)/2, fd, v]};
zRXLP, zRXLPL, zRXGPL, zRILP, zRILPL, zRIGP, zRIGPL, zRIL0 => RI.DoReadIndirectOps[m, op]; 
zWXLP, zWXLPL, zWXGPL, zWILP, zWILPL, zWIGPL => RI.DoWriteIndirectOps[m, op];
zWS0, zWSB, zWSDB, zWSF => RI.DoWriteSwappedOps[m, op];
zRFC => { -- read from code segment
n: CARDINAL _ RI.NextOpByte[m];
fd: FieldDescriptor _ LOOPHOLE[RI.NextOpByte[m]];
p: LONG POINTER _ m.cb + n + RI.CardV[RI.Pop[m]];
RI.Push[m, RI.ReadField[m, p, fd]]};
zRFS => {
fd: FieldDescriptor _ LOOPHOLE[RI.Pop[m]];
p: Ptr1 _ RI.Ptr1V[RI.Pop[m]];
p _ p + fd.offset; fd.offset _ 0;
RI.Push[m, RI.ReadField[m, LONG[p], fd]]};
zRFSL => {
fd: FieldDescriptor _ LOOPHOLE[RI.Pop[m]];
p: LPtr1 _ RI.LPtr1V[RI.Pop2[m]];
p _ p + fd.offset; fd.offset _ 0;
RI.Push[m, RI.ReadField[m, p, fd]]};
zWFS => {
fd: FieldDescriptor _ LOOPHOLE[RI.Pop[m]];
p: Ptr1 _ RI.Ptr1V[RI.Pop[m]];
p _ p + fd.offset; fd.offset _ 0;
RI.WriteField[m, LONG[p], fd, RI.Pop[m]]};
zWFSL => {
fd: FieldDescriptor _ LOOPHOLE[RI.Pop[m]];
p: LPtr1 _ RI.LPtr1V[RI.Pop2[m]];
p _ p + fd.offset; fd.offset _ 0;
RI.WriteField[m, p, fd, RI.Pop[m]]};
zLP => {
RI.Push2[m, RI.VLPtr1[LONG[RI.Ptr1V[RI.Pop[m]]]]]};
zPUSH => {
m.sd _ m.sd + 1};
zPOP => {
m.sd _ m.sd - 1};
zEXCH => {
t: Value _ m.stack[m.sd-1];
m.stack[m.sd-1] _ m.stack[m.sd-2];
m.stack[m.sd-2] _ t};
zDUP => {
m.stack[m.sd] _ m.stack[m.sd-1];
m.sd _ m.sd + 1};
zNILCK => {
IF RI.Ptr1V[m.stack[m.sd-1]] = NIL THEN RI.NilFault[m]};
zNILCKL => {
IF RI.Ptr1V[m.stack[m.sd-1]] = NIL AND RI.Ptr1V[m.stack[m.sd-2]] = NIL THEN RI.NilFault[m]};
zBNDCK => {
bound: CARDINAL _ RI.CardV[RI.Pop[m]];
IF RI.CardV[m.stack[m.sd-1]] >= bound THEN RI.BoundsFault[m]};
zLINKB => {
delta: CARDINAL _ RI.NextOpByte[m];
indirectLoc: CARDINAL _ RI.CardV[m.stack[m.sd]]; 
(m.l + localbase)^ _ RI.VCard[indirectLoc - delta]};
zJ2, zJ3, zJ4, zJ5, zJ6, zJ7, zJ8, zJ9 => {
alpha: INTEGER = op - zJ2 + 2;
RI.SetPc[m, savedPc + alpha]};
zJB => {
alpha: INTEGER = RI.SignedOpByte[m];
RI.SetPc[m, savedPc + alpha]};
zJW => {
alpha: RECORD [SELECT OVERLAID * FROM
int => [i: INTEGER],
pair => [bp: RI.Bytes],
ENDCASE];
alpha.bp.b1 _ RI.NextOpByte[m];
alpha.bp.b2 _ RI.NextOpByte[m];
RI.SetPc[m, savedPc + alpha.i]};
zJEQ2, zJEQ3, zJEQ4, zJEQ5, zJEQ6, zJEQ7, zJEQ8, zJEQ9 => {
alpha: INTEGER = op - zJEQ2 + 2;
op2: CARDINAL = RI.CardV[RI.Pop[m]];
op1: CARDINAL = RI.CardV[RI.Pop[m]];
IF op1 = op2 THEN RI.SetPc[m, savedPc + alpha]};
zJNE2, zJNE3, zJNE4, zJNE5, zJNE6, zJNE7, zJNE8, zJNE9 => {
alpha: INTEGER = op - zJNE2 + 2;
op2: CARDINAL = RI.CardV[RI.Pop[m]];
op1: CARDINAL = RI.CardV[RI.Pop[m]];
IF op1 # op2 THEN RI.SetPc[m, savedPc + alpha]};
zJLB, zJGEB, zJGB, zJLEB => RI.DoSignedJump[m, savedPc, op];
zJEQB, zJNEB, zJULB, zJUGEB, zJUGB, zJULEB => RI.DoUnsignedJump[m, savedPc, op];
zJZEQB => {
alpha: INTEGER = RI.SignedOpByte[m];
op1: CARDINAL = RI.CardV[RI.Pop[m]];
IF op1 = 0 THEN RI.SetPc[m, savedPc + alpha]};
zJZNEB => {
alpha: INTEGER = RI.SignedOpByte[m];
op1: CARDINAL = RI.CardV[RI.Pop[m]];
IF op1 # 0 THEN RI.SetPc[m, savedPc + alpha]};
zJIB => {
tab: RECORD [SELECT OVERLAID * FROM
bytes => [bp: Bytes],
ptr => [p: RI.LCB RELATIVE POINTER TO PACKED ARRAY [0..0) OF Byte],
ENDCASE];
delta: LONG POINTER TO PACKED ARRAY [0..0) OF Byte;
index, bound: CARDINAL;
tab.bp.b1 _ RI.NextOpByte[m];
tab.bp.b2 _ RI.NextOpByte[m]; 
delta _ @LOOPHOLE[m.cb, RI.LCB][tab.p];
bound _ RI.CardV[RI.Pop[m]];
index _ RI.CardV[RI.Pop[m]];
IF index < bound THEN {
alpha: Byte;
RI.ReadAtAddress[m, delta + index/2];
alpha _ delta[index];
RI.SetPc[m, savedPc + alpha]};
};
zJIW => {
tab: RECORD [SELECT OVERLAID * FROM
bytes => [bp: Bytes],
ptr => [p: RI.LCB RELATIVE POINTER TO ARRAY [0..0) OF INTEGER],
ENDCASE];
delta: LONG POINTER TO ARRAY [0..0) OF INTEGER;
index, bound: CARDINAL;
tab.bp.b1 _ RI.NextOpByte[m];
tab.bp.b2 _ RI.NextOpByte[m]; 
delta _ @LOOPHOLE[m.cb, RI.LCB][tab.p];
bound _ RI.CardV[RI.Pop[m]];
index _ RI.CardV[RI.Pop[m]];
IF index < bound THEN {
alpha: INTEGER;
RI.ReadAtAddress[m, delta + index];
alpha _ delta[index];
RI.SetPc[m, savedPc + alpha]};
};
zADD, zADD01, zSUB, zMUL, zDBL, zDIV, zLDIV, zNEG, zINC, zAND, zOR, zXOR, zSHIFT => RI.DoShortArithmetic[m, op];
zDADD => {
c2: LONG CARDINAL = RI.LCardV[RI.Pop2[m]];
c1: LONG CARDINAL = RI.LCardV[RI.Pop2[m]];
RI.Push2[m, RI.VLCard[c1+c2]]};
zDSUB => {
c2: LONG CARDINAL = RI.LCardV[RI.Pop2[m]];
c1: LONG CARDINAL = RI.LCardV[RI.Pop2[m]];
RI.Push2[m, RI.VLCard[c1-c2]]};
zDCOMP => {
c2: LONG INTEGER = RI.LIntV[RI.Pop2[m]];
c1: LONG INTEGER = RI.LIntV[RI.Pop2[m]];
Compare: PROC [x, y: LONG INTEGER] RETURNS [Value] = TRUSTED MACHINE CODE {
PrincOps.zDCOMP};
RI.Push[m, Compare[c1,c2]]};
zDUCOMP => {
c2: LONG CARDINAL = RI.LCardV[RI.Pop2[m]];
c1: LONG CARDINAL = RI.LCardV[RI.Pop2[m]];
UnsignedCompare: PROC [x, y: LONG CARDINAL] RETURNS [Value] = TRUSTED MACHINE CODE {
PrincOps.zDUCOMP};
RI.Push[m, UnsignedCompare[c1,c2]]};
zEFC0, zEFC1, zEFC2, zEFC3, zEFC4, zEFC5, zEFC6, zEFC7, zEFC8, zEFC9, zEFC10, zEFC11, zEFC12, zEFC13, zEFC14, zEFC15, zEFCB => {
lk: Byte = IF op = zEFCB THEN RI.NextOpByte[m] ELSE op-zEFC0;
RI.WriteAtAddress[m, LONG[@LOOPHOLE[m.l, FrameHandle].pc]];
LOOPHOLE[m.l, FrameHandle].pc _ [m.pc];
RI.Xfer[m: m, dst: RI.FetchLink[m, lk], src: [frame[RI.FH[m.l]]]]};
zLFC1, zLFC2, zLFC3, zLFC4, zLFC5, zLFC6, zLFC7, zLFC8, zLFC9, zLFC10, zLFC11, zLFC12, zLFC13, zLFC14, zLFC15, zLFC16, zLFCB => {
evi: CARDINAL = IF op = zLFCB THEN RI.NextOpByte[m] ELSE op-zLFC1+1;
ev: EntryVectorItem;
nlf: FrameHandle;
nPc: CARDINAL;
RI.WriteAtAddress[m, LONG[@LOOPHOLE[m.l, FrameHandle].pc]];
LOOPHOLE[m.l, FrameHandle].pc _ [m.pc];
RI.DoubleReadAtAddress[m, @LOOPHOLE[m.cb, LCB].entry[evi]];
ev _ LOOPHOLE[m.cb, LCB].entry[evi];
nPc _ ev.initialpc * 2;
IF nPc = 0 THEN RI.UnboundProcTrap[m, RI.MakeProcDesc[m, LOOPHOLE[m.g], evi]];
nlf _ RI.AllocFrame[ev.info.framesize];
RI.WriteAtAddress[m, LONG[@nlf.accesslink]];
nlf.accesslink _ LOOPHOLE[m.g];
RI.WriteAtAddress[m, LONG[@nlf.returnlink]];
nlf.returnlink _ [frame[RI.FH[m.l]]];
nlf.pc _ [nPc+1];	-- for interpreter display of lf
m.l _ LOOPHOLE[nlf]; RI.SetPc[m, nPc]};
zSFC => {
RI.WriteAtAddress[m, LONG[@LOOPHOLE[m.l, FrameHandle].pc]];
LOOPHOLE[m.l, FrameHandle].pc _ [m.pc];
RI.Xfer[m: m, dst: LOOPHOLE[RI.Pop[m]], src: [frame[RI.FH[m.l]]]]};
zRET => {
link: PrincOps.ControlLink = LOOPHOLE[m.l, FrameHandle].returnlink;
RI.ReadAtAddress[m, LONG[@LOOPHOLE[m.l, FrameHandle].returnlink]];
IF link = RI.MagicReturn THEN SIGNAL RI.FinishedExecution;
RI.Xfer[m: m, dst: link, src: NullLink, free: TRUE]};
zPORTO => {
port: PortHandle _ LOOPHOLE[RI.Pop[m]];
RI.WriteAtAddress[m, LONG[@LOOPHOLE[m.l, FrameHandle].pc]];
LOOPHOLE[m.l, FrameHandle].pc _ [m.pc];
RI.WriteAtAddress[m, LONG[@port.frame]];
port.frame _ RI.FH[m.l];
RI.Xfer[m: m, dst: port.dest, src: LOOPHOLE[port]]};
zPORTI => {
port: PortHandle _ LOOPHOLE[m.stack[m.sd+1]];
src: ControlLink _ LOOPHOLE[m.stack[m.sd]];
RI.WriteAtAddress[m, LONG[@port.frame]];
port.frame _ NIL;
IF src # NullLink THEN {
RI.WriteAtAddress[m, LONG[@port.dest]];
port.dest _ src};
};
zKFCB => {
alpha: CARDINAL _ RI.NextOpByte[m];
link: ControlLink;
SELECT alpha FROM
sBLTEC, sBLTECL => { -- can't let these through as cb reg points to us
data, const: LPtr1;
equal: Value _ [1];
count: CARDINAL;
const _ m.cb + RI.CardV[RI.Pop[m]];
count _ RI.CardV[RI.Pop[m]];
IF alpha = sBLTEC THEN {
sp: Ptr1 _ RI.Ptr1V[RI.Pop[m]];
data _ sp}
ELSE data _ RI.LPtr1V[RI.Pop2[m]];
THROUGH [0..count) DO
IF RI.Read[m, data] # RI.Read[m, const] THEN GO TO false;
data _ data + SIZE[Value]; const _ const + SIZE[Value];
REPEAT
false => equal _ [0];
ENDLOOP;
RI.Push[m, equal]};
sBYTBLTEC, sBYTBLTECL => SIGNAL StrangeCode;
ENDCASE => {
RI.ReadAtAddress[m, LONG[@SD[alpha]]];
link _ SD[alpha];
RI.WriteAtAddress[m, LONG[@LOOPHOLE[m.l, FrameHandle].pc]];
LOOPHOLE[m.l, FrameHandle].pc _ [m.pc];
RI.Xfer[m: m, dst: link, src: [frame[RI.FH[m.l]]]]};
};
zDESCB => {
alpha: CARDINAL _ RI.NextOpByte[m]/2; -- Alto compatibility, I believe
RI.Push[m, LOOPHOLE[RI.MakeProcDesc[m: m, gf: LOOPHOLE[m.g], entry: alpha]]]};
zDESCBS => {
alpha: CARDINAL _ RI.NextOpByte[m]/2; -- Alto compatibility, I believe
gf: GlobalFrameHandle _ LOOPHOLE[RI.Pop[m]];
RI.Push[m, LOOPHOLE[RI.MakeProcDesc[m: m, gf: gf, entry: alpha]]]};
zDST => {
alpha: CARDINAL _ RI.NextOpByte[m];
st: POINTER TO StateVector = LOOPHOLE[m.l + alpha];
FOR i: CARDINAL IN [0..MIN[m.sd+2, PrincOps.stackDepth]) DO
RI.StoreLocal[m, alpha +i];
st.stk[i] _ m.stack[i];
ENDLOOP;
RI.StoreLocal[m, alpha + PrincOps.stackDepth];
st.stkptr _ m.sd;
};
zLST => {
RI.LoadState[m, FALSE]};
zLSTF => {
RI.LoadState[m, TRUE]};
zALLOC => {RI.Push[m, LOOPHOLE[RI.AllocFrame[RI.CardV[RI.Pop[m]]]]]};
zFREE => {RI.FreeFrame[LOOPHOLE[RI.Pop[m]]]};
zLLKB => {
alpha: CARDINAL _ RI.NextOpByte[m];
RI.Push[m, LOOPHOLE[RI.FetchLink[m, alpha]]]};
zBLT => {
to: Ptr1 _ RI.Ptr1V[RI.Pop[m]];
nwords: CARDINAL _ RI.CardV[RI.Pop[m]];
from: Ptr1 _ RI.Ptr1V[RI.Pop[m]];
THROUGH [0..nwords) DO
RI.Write[m, to, RI.Read[m, from]];
to _ to + SIZE[Value];
from _ from + SIZE[Value];
ENDLOOP;
};
zBLTL => {
to: LPtr1 _ RI.LPtr1V[RI.Pop2[m]];
nwords: CARDINAL _ RI.CardV[RI.Pop[m]];
from: LPtr1 _ RI.LPtr1V[RI.Pop2[m]];
THROUGH [0..nwords) DO
RI.Write[m, to, RI.Read[m, from]];
to _ to + SIZE[Value];
from _ from + SIZE[Value];
ENDLOOP;
};
zBLTC => {
to: Ptr1 _ RI.Ptr1V[RI.Pop[m]];
nwords: CARDINAL _ RI.CardV[RI.Pop[m]];
delta: CARDINAL _ RI.CardV[RI.Pop[m]];
from: LPtr1 _ m.cb + delta;
THROUGH [0..nwords) DO
RI.Write[m, to, RI.Read[m, from]];
to _ to + SIZE[Value];
from _ from + SIZE[Value];
ENDLOOP;
};
zBLTCL => {
to: LPtr1 _ RI.LPtr1V[RI.Pop2[m]];
nwords: CARDINAL _ RI.CardV[RI.Pop[m]];
delta: CARDINAL _ RI.CardV[RI.Pop[m]];
from: LPtr1 _ m.cb + delta;
THROUGH [0..nwords) DO
RI.Write[m, to, RI.Read[m, from]];
to^ _ from^;
to _ to + SIZE[Value];
from _ from + SIZE[Value];
ENDLOOP;
};
zBITBLT => {
DoBitBlt: PROC [Value] = TRUSTED MACHINE CODE {zBITBLT};
DoBitBlt[RI.Pop[m]]};
zIWDC => {
NULL}; --SIGNAL StrangeCode
zDWDC => {
NULL}; --SIGNAL StrangeCode
zSTOP => {
SIGNAL StrangeCode};
zCATCH => {
[] _ RI.NextOpByte[m]};
zMISC => DoMiscOp[m];
zSTARTIO => {
SIGNAL StrangeCode};
zJRAM => {
SIGNAL StrangeCode};
zWR => {
SIGNAL StrangeCode};
zRR => { -- legal values are 0-8, each returns an UNSPECIFIED
regVal: Value;
alpha: Byte = RI.NextOpByte[m];
SELECT alpha FROM -- ugly, but since alpha is in the instruction stream ...
0 => regVal _ RR0[];
1 => regVal _ RR1[];
2 => regVal _ RR2[];
3 => regVal _ RR3[];
4 => regVal _ RR4[];
5 => regVal _ RR5[];
6 => regVal _ RR6[];
7 => regVal _ RR7[];
8 => regVal _ RR8[];
ENDCASE => SIGNAL StrangeCode;
 RI.Push[m, regVal]};
zBRK => {SIGNAL StrangeCode};
ENDCASE;
IF m.singleStep OR (LOOPHOLE[m.g, CARDINAL] = LOOPHOLE[m.breakGF, CARDINAL] AND m.pc = m.breakPC) THEN EXIT;
ENDLOOP;
};

RR0: PROC RETURNS [Value] = TRUSTED MACHINE CODE {zRR, 0};
RR1: PROC RETURNS [Value] = TRUSTED MACHINE CODE {zRR, 1};
RR2: PROC RETURNS [Value] = TRUSTED MACHINE CODE {zRR, 2};
RR3: PROC RETURNS [Value] = TRUSTED MACHINE CODE {zRR, 3};
RR4: PROC RETURNS [Value] = TRUSTED MACHINE CODE {zRR, 4};
RR5: PROC RETURNS [Value] = TRUSTED MACHINE CODE {zRR, 5};
RR6: PROC RETURNS [Value] = TRUSTED MACHINE CODE {zRR, 6};
RR7: PROC RETURNS [Value] = TRUSTED MACHINE CODE {zRR, 7};
RR8: PROC RETURNS [Value] = TRUSTED MACHINE CODE {zRR, 8};

aLocalZERO: CARDINAL = 103B; --?
DoASSOC: PROC [vp: CARDINAL, m: MapFlags] = TRUSTED MACHINE CODE {zMISC, aASSOC};
DoSETF: PROC [vp: CARDINAL, new: MapFlags] RETURNS [old: UNSPECIFIED] = TRUSTED MACHINE CODE {zMISC, aSETF};
DoLOADRAMJ: PROC [item: LONG POINTER, flag: BOOL] = TRUSTED MACHINE CODE {zMISC, aLOADRAMJ};
DoINPUT: PROC [device: CARDINAL] RETURNS [CARDINAL] = TRUSTED MACHINE CODE {zMISC, aINPUT};
DoOUTPUT: PROC [data, device: CARDINAL] = TRUSTED MACHINE CODE {zMISC, aOUTPUT};
DoCHKSUM: PROC [s: CARDINAL, count: CARDINAL, p: LONG POINTER] RETURNS [CARDINAL] = TRUSTED MACHINE CODE {zMISC, aCHKSUM};
DoSETMP: PROC [CARDINAL] = TRUSTED MACHINE CODE {zMISC, aSETMP};
DoRCLK: PROC RETURNS [LONG CARDINAL] = TRUSTED MACHINE CODE {zMISC, aRCLK};
DoRPRINTER: PROC RETURNS [CARDINAL] = TRUSTED MACHINE CODE {zMISC, aRPRINTER};
DoWPRINTER: PROC [CARDINAL] = TRUSTED MACHINE CODE {zMISC, aWPRINTER};
DoGETF: PROC [vp: CARDINAL] RETURNS [MapEntry] = TRUSTED MACHINE CODE {zMISC, aGETF};

DoFADD: PROC [REAL, REAL] RETURNS [REAL] = TRUSTED MACHINE CODE {zMISC, aFADD};
DoFSUB: PROC [REAL, REAL] RETURNS [REAL] = TRUSTED MACHINE CODE {zMISC, aFSUB};
DoFMUL: PROC [REAL, REAL] RETURNS [REAL] = TRUSTED MACHINE CODE {zMISC, aFMUL};
DoFDIV: PROC [REAL, REAL] RETURNS [REAL] = TRUSTED MACHINE CODE {zMISC, aFDIV};
DoFCOMP: PROC [x, y: REAL] RETURNS [INTEGER] = TRUSTED MACHINE CODE {zMISC, aFCOMP};
DoFIX: PROC [REAL] RETURNS [INT]  = TRUSTED MACHINE CODE {zMISC, aFIX};
DoFLOAT: PROC [INT] RETURNS [REAL] = TRUSTED MACHINE CODE {zMISC, aFLOAT};
DoFIXI: PROC [REAL] RETURNS [INTEGER] = TRUSTED MACHINE CODE {zMISC, aFIXI};
DoFIXC: PROC [REAL] RETURNS [CARDINAL] = TRUSTED MACHINE CODE {zMISC, aFIXC};
DoFSTICKY: PROC [WORD] RETURNS [WORD] = TRUSTED MACHINE CODE {zMISC, aFSTICKY};
DoFREM: PROC [REAL, REAL] RETURNS [REAL] = TRUSTED MACHINE CODE {zMISC, aFREM};
DoROUND: PROC [REAL] RETURNS [INT]  = TRUSTED MACHINE CODE {zMISC, aROUND};
DoROUNDI: PROC [REAL] RETURNS [INTEGER] = TRUSTED MACHINE CODE {zMISC, aROUNDI};
DoROUNDC: PROC [REAL] RETURNS [CARDINAL] = TRUSTED MACHINE CODE {zMISC, aROUNDC};
DoFSQRT: PROC [REAL] RETURNS [REAL]  = TRUSTED MACHINE CODE {zMISC, aFSQRT};
DoFSC: PROC [REAL, INTEGER] RETURNS [REAL]  = TRUSTED MACHINE CODE {zMISC, aFSC};

DoLocalZERO: PROC [count: CARDINAL] = TRUSTED MACHINE CODE {zMISC, aLocalZERO};
DoZERO: PROC [lp: LONG POINTER, count: CARDINAL] RETURNS [LONG POINTER] = TRUSTED MACHINE CODE {zMISC, aZERO};
DoVERSION: PROC RETURNS [LONG CARDINAL] = TRUSTED MACHINE CODE {zMISC, aVERSION};

MapFlags: TYPE = UNSPECIFIED;
MapEntry: TYPE = UNSPECIFIED;
DoMiscOp: PROC [m: Machine] = TRUSTED {
OPEN CM: CedarMicrocode;
alpha: Byte = RI.NextOpByte[m];
SELECT alpha FROM
aASSOC => {
p2: UNSPECIFIED = RI.Pop[m];
p1: UNSPECIFIED = RI.Pop[m];
DoASSOC[p1, p2]};
aSETF => {
p2: UNSPECIFIED = RI.Pop[m];
p1: UNSPECIFIED = RI.Pop[m];
RI.Push[m, LOOPHOLE[DoSETF[p1, p2]]]};
aLOADRAMJ => {
p2: UNSPECIFIED = RI.Pop[m];
p1: LONG POINTER = LOOPHOLE[RI.Pop2[m]];
DoLOADRAMJ[p1, p2]};
aINPUT => {
p1: UNSPECIFIED = RI.Pop[m];
RI.Push[m, LOOPHOLE[DoINPUT[p1]]]};
aOUTPUT => {
p2: UNSPECIFIED = RI.Pop[m];
p1: UNSPECIFIED = RI.Pop[m];
DoOUTPUT[p1, p2]};
aCHKSUM => {
p3: LONG POINTER = LOOPHOLE[RI.Pop2[m]];
p2: UNSPECIFIED = RI.Pop[m];
p1: UNSPECIFIED = RI.Pop[m];
RI.Push[m, LOOPHOLE[DoCHKSUM[p1, p2, p3]]]};
aSETMP => {
p1: UNSPECIFIED = RI.Pop[m];
DoSETMP[p1]};
aRCLK => {
RI.Push2[m, LOOPHOLE[DoRCLK[]]]};
aRPRINTER => {
RI.Push[m, LOOPHOLE[DoRPRINTER[]]]};
aWPRINTER => {
p1: UNSPECIFIED = RI.Pop[m];
DoWPRINTER[p1]};
aGETF => {
p1: UNSPECIFIED = RI.Pop[m];
RI.Push[m, LOOPHOLE[DoGETF[p1]]]};
aFADD, aFSUB, aFMUL, aFDIV, aFREM => {
p2: REAL = LOOPHOLE[RI.Pop2[m]];
p1: REAL = LOOPHOLE[RI.Pop2[m]];
res: REAL;
SELECT alpha FROM
aFADD => 
res _ DoFADD[p1, p2];
aFSUB => 
res _ DoFSUB[p1, p2];
aFMUL => 
res _ DoFMUL[p1, p2];
aFDIV => 
res _ DoFDIV[p1, p2];
aFREM => 
res _ DoFREM[p1, p2];
ENDCASE;
RI.Push2[m, LOOPHOLE[res]]};
aFIXI, aFIXC, aROUNDI, aROUNDC => {
par: REAL = LOOPHOLE[RI.Pop2[m]];
res: UNSPECIFIED;
SELECT alpha FROM
aFADD => 
res _ DoFIXI[par];
aFSUB => 
res _ DoFIXC[par];
aFMUL => 
res _ DoROUNDI[par];
aFDIV => 
res _ DoROUNDC[par];
ENDCASE;
RI.Push[m, LOOPHOLE[res]]};
aFCOMP => {
p2: REAL = LOOPHOLE[RI.Pop2[m]];
p1: REAL = LOOPHOLE[RI.Pop2[m]];
res: INTEGER = DoFCOMP[p1, p2];
RI.Push[m, LOOPHOLE[res]]};
aFSQRT => {
p1: REAL = LOOPHOLE[RI.Pop2[m]];
res: REAL;
res _ DoFSQRT[p1];
RI.Push2[m, LOOPHOLE[res]]};
aFLOAT => {
p1: INT = LOOPHOLE[RI.Pop2[m]];
res: REAL;
res _ DoFLOAT[p1];
RI.Push2[m, LOOPHOLE[res]]};
aFIX, aROUND => {
p1: REAL = LOOPHOLE[RI.Pop2[m]];
res: INT;
SELECT alpha FROM
aFIX => res _ DoFIX[p1];
aROUND => res _ DoROUND[p1];
ENDCASE;
RI.Push2[m, LOOPHOLE[res]]};
aFSTICKY => {
p1: UNSPECIFIED = RI.Pop[m];
RI.Push[m, LOOPHOLE[DoFSTICKY[p1]]]};
aFSC => {
p2: UNSPECIFIED = RI.Pop[m];
p1: REAL = LOOPHOLE[RI.Pop2[m]];
RI.Push2[m, LOOPHOLE[DoFSC[p1, p2]]]};
aLocalZERO => {
p1: UNSPECIFIED = RI.Pop[m];
DoLocalZERO[p1]};
aZERO => {
p2: UNSPECIFIED = RI.Pop[m];
p1: LONG POINTER = LOOPHOLE[RI.Pop2[m]];
RI.Push2[m, LOOPHOLE[DoZERO[p1, p2]]]};
aVERSION => {
RI.Push2[m, LOOPHOLE[DoVERSION[]]]};
CM.aRECLAIMEDREF => {
r: REF = LOOPHOLE[RI.Pop2[m]];
RI.Push2[m, LOOPHOLE[CM.RECLAIMEDREF[r]]];
};
CM.aENABLEMICROCODE => TRUSTED {
zct: LONG POINTER = LOOPHOLE[RI.Pop2[m]];
n: NAT = CM.ENABLEMICROCODE[zct];
RI.Push[m, LOOPHOLE[n]];
};
CM.aDISABLEMICROCODE =>  {
zct: LONG POINTER = LOOPHOLE[RI.Pop2[m]];
CM.DISABLEMICROCODE[zct];
};
CM.aCREATEREF => {
nhp: LONG POINTER = LOOPHOLE[RI.Pop2[m]];
CM.CREATEREF[nhp];
};
CM.aRECLAIMABLEREF => {
nhp: LONG POINTER = LOOPHOLE[RI.Pop2[m]];
cd: UNSPECIFIED _ CM.RECLAIMABLEREF[nhp];
RI.Push[m, LOOPHOLE[cd]];
};
CM.aALLOCATEOBJECT => {
type: UNSPECIFIED = RI.Pop[m];
size: CARDINAL = RI.CardV[RI.Pop[m]];
r: REF = CM.ALLOCATE[size, type];
RI.Push2[m, LOOPHOLE[r]];
};
CM.aFREEOBJECT => {
nhp: LONG POINTER = LOOPHOLE[RI.Pop2[m]];
success: BOOL = CM.FREEPLEASE[nhp];
RI.Push[m, LOOPHOLE[success]];
};
CM.aRTMOVESTATUS => {
gcStateBank: CARDINAL = RI.CardV[RI.Pop[m]];
msOperation: CARDINAL = RI.CardV[RI.Pop[m]];
val: CARDINAL = CM.RTMOVESTATUS[msOperation, gcStateBank];
RI.Push[m, RI.VCard[val]];
};
CM.aGETCANONICALREFERENTTYPE => {
ref: REF = LOOPHOLE[RI.Pop2[m]];
type: UNSPECIFIED = CM.GETCANONICALREFERENTTYPE[ref];
RI.Push[m, type];
};
ENDCASE => ERROR StrangeCode};
}.
	alpha=240b	Zero and Enable Event counters
	alpha=241b	Read Event counters
	alpha=242b	Stop Event counters
	alpha=243b	Set PC Histogram Address
	alpha=244b	Unused
	alpha=245b	Unused
	alpha=246b	Read/write muffler/manifold system
	alpha=247b	Reset Ethernet hardware and tasks (PrincOps only)
	alpha=250B	Reset 10MBEthernet hardware and tasks (PrincOps only)
	alpha=251B	Get size of real and virtual memory
	alpha=252B	Halt Dorado (for timed power-off)
	alpha=253B	Set display field rate
	alpha=254b	Reset disk hardware and task (PrincOps only)
	alpha=255b	Set interval timer (PrincOps only)
	alpha=256b	Stable Storage block input
	alpha=257b	Stable Storage block output




ΈRESIDisp.mesa
Last Edited by: Sweet, March 7, 1985 3:05:08 pm PST
Types and Global Data
Instruction execution
savedSP: CARDINAL = m.sd;
Most popular operations, avoiding an extra procedure call
Monitor stuff
Loads & Stores of Locals
Loads & Stores of Globals
Loads of Constants
Reads from pointer on stack
Writes from pointer on stack
Read and write string
Read indirect through locals
Write indirect through locals
Write Swapped
Field descriptor on stack
Random stack operations
StoreLocal[localbase];
Jumps
Short arithmetic
Long arithmetic
Function call
compiler doesn't generate the next two.
Block Transfer
Punt memory reference statistics
Random others
Why are we disabling interrupts
Enabling interrupts is a little more socially acceptable
I think this is ALTO only
Treat as a two byte NOOP
I think this is ALTO only
I think this is ALTO only
I think this is ALTO only
Machine codes for read register
Machine codes for misc operations



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