Artifact 25d42018d8efacf1174fc2e87f141ac5ad91503f65959e7b55d4b10448e92f4c:

• File psl-1983/3-1/kernel/20/faslin.red — part of check-in [eb17ceb7f6] at 2020-04-21 19:40:01 on branch master — Add Reduce 3.0 to the historical section of the archive, and some more
  files relating to version sof PSL from the early 1980s. Thanks are due to
  Paul McJones and Nelson Beebe for these, as well as to all the original
  authors.

  git-svn-id: https://svn.code.sf.net/p/reduce-algebra/code/historical@5328 2bfe0521-f11c-4a00-b80e-6202646ff360 (user: arthurcnorman@users.sourceforge.net, size: 4582) [annotate] [blame] [check-ins using] [more...]

%  25-May-1983 Mark R. Swanson
%  Changed magic number to differentiate extended-20 fasl files from old ones

on SysLisp;

external WString TokenBuffer;
external WArray ArgumentBlock;

internal WConst CODE_OFFSET = 0,
		RELOC_ID_NUMBER = 1,
		RELOC_VALUE_CELL = 2,
		RELOC_FUNCTION_CELL = 3;

internal WConst RELOC_WORD = 1,
		RELOC_RIGHT_HALF = 2,
		RELOC_INF = 3;

internal WConst FASLMAGIC = 2099;

CompileTime <<

smacro procedure LocalIDNumberP U;
    U >= 2048;

smacro procedure LocalToGlobalID U;
    IDTable[U - 2048];

smacro procedure ExtraArgumentP U;
    U >= 8150;				% Something enough less than 8192

smacro procedure MakeExtraArgument U;
    U - (8150 + (MaxRealRegs + 1));
>>;

internal WVar CodeBase;

syslsp procedure FaslIN File;
begin scalar F, N, M, IDTable, CodeSize, OldCodeBase,
	     E, BT, R, RT, RI, BI, Top, BTop;
    F := BinaryOpenRead File;
    N := BinaryRead F;			% First word is magic number
    if N neq FASLMAGIC then ContError(99,
				      "%r is not a fasl format file",
				      File,
				      FaslIN File);
    M := BinaryRead F;			% Number of local IDs
    Top := GtWArray 0;			% pointer to top of space
    IDTable := GtWArray(M + 1);		% Allocate space for table
    for I := 0 step 1 until M do
    <<  TokenBuffer[0] := BinaryRead F;	% word is length of ID name
	BinaryReadBlock(F, &TokenBuffer[1], StrPack TokenBuffer[0]);
	IDTable[I] := IDInf Intern MkSTR TokenBuffer >>;
    CodeSize := BinaryRead F;		% Size of code segment in words
    OldCodeBase := CodeBase;		% So FASLIN is reentrant
    CodeBase := GtBPS CodeSize;		% Allocate space in BPS
    BTop := GTBPS 0;			% pointer to top
    E := CodeBase + BinaryRead F;	% Next word is offset of init function
					% Will be called after code is read
    BinaryReadBlock(F, CodeBase, CodeSize);	% Put the next N words there
    N := BinaryRead F;		% Next word is size of bit table in words
    BT := GtWArray N;			% Allocate space for bit table
    BinaryReadBlock(F, BT, N);		% read bit table
    BinaryClose F;			% close the file
    CodeSize := CodeSize*AddressingUnitsPerItem - 1;
    for I := 0 step 1 until CodeSize do
    <<  R := BitTable(BT, I);
	BI := CodeBase + I;
	case R of
	    RELOC_WORD:
	    <<  RT := RelocWordTag @BI;
		RI := RelocWordInf @BI;
		case RT of
		    CODE_OFFSET:
			@BI := CodeBase + RI;
		    RELOC_VALUE_CELL:
		    <<  if ExtraArgumentP RI then
			    RI := &ArgumentBlock[MakeExtraArgument RI]
			else if LocalIDNumberP RI then
			    RI := &SymVal LocalToGlobalID RI
			else RI := &SymVal RI;
			@BI := RI >>;
		    RELOC_FUNCTION_CELL:
		    <<  if LocalIDNumberP RI then RI := LocalToGlobalID RI;
			@BI :=
			   SymFnc + AddressingUnitsPerFunctionCell*RI >>;
		    RELOC_ID_NUMBER:	% Must be a local ID number
		    <<  if LocalIDNumberP RI then RI := LocalToGlobalID RI;
			@BI := RI >>;
		end >>;
	    RELOC_RIGHT_HALF:
	    <<  RT := RelocRightHalfTag @BI;
		RI := RelocRightHalfInf @BI;
		case RT of
		    CODE_OFFSET:
			RightHalf @BI := CodeBase + RI;
		    RELOC_VALUE_CELL:
		    <<  if ExtraArgumentP RI then
			    RI := &ArgumentBlock[MakeExtraArgument RI]
			else if LocalIDNumberP RI then
			    RI := &SymVal LocalToGlobalID RI
			else RI := &SymVal RI;
			RightHalf @BI := RI >>;
		    RELOC_FUNCTION_CELL:
		    <<  if LocalIDNumberP RI then RI := LocalToGlobalID RI;
			RightHalf @BI :=
			    SymFnc + AddressingUnitsPerFunctionCell*RI >>;
		    RELOC_ID_NUMBER:	% Must be a local ID number
		    <<  if LocalIDNumberP RI then RI := LocalToGlobalID RI;
			RightHalf @BI := RI >>;
		end >>;
	    RELOC_INF:
	    <<  RT := RelocInfTag @BI;
		RI := RelocInfInf @BI;
		case RT of
		    CODE_OFFSET:
			Inf @BI := CodeBase + RI;
		    RELOC_VALUE_CELL:
		    <<  if ExtraArgumentP RI then
			    RI := &ArgumentBlock[MakeExtraArgument RI]
			else if LocalIDNumberP RI then
			    RI := &SymVal LocalToGlobalID RI
			else RI := &SymVal RI;
			Inf @BI := RI >>;
		    RELOC_FUNCTION_CELL:
		    <<  if LocalIDNumberP RI then RI := LocalToGlobalID RI;
			Inf @BI :=
			    SymFnc + AddressingUnitsPerFunctionCell*RI >>;
		    RELOC_ID_NUMBER:	% Must be a local ID number
		    <<  if LocalIDNumberP RI then RI := LocalToGlobalID RI;
			Inf @BI := RI >>;
		end >>;
	end >>;
    DelWArray(BT, Top);
					% return the space used by tables
    AddressApply0 E;			% Call the init routine
    CodeBase := OldCodeBase;		% restore previous value for CodeBase
    DelBPS(E, BTop);			% deallocate space of init routine
end;

syslsp procedure PutEntry(Name, Type, Offset);
    PutD(Name, Type, MkCODE(CodeBase + Offset));

off Syslisp;

END;