f2c4dc81
 Salvador Abreu
added most of the...
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% allocAddr/3: Allocate an address for the result of an expression.
allocAddr(_, Addr, S) % Destination already known
! <= nonvar(Addr).
allocAddr(exp(type(map(_,_), Sz), id(X)), address(X), S)
! <= nonvar(X).
allocAddr(exp(_, id(X)), Addr, S) % In case it's a named symbol
<-> lookup1(address(Addr), A)
<= nonvar(X), lookup(id(X)-A, S).
allocAddr(exp(_, lit(X)), lit(X), S) % A literal: take it as it is
! <= nonvar(X).
allocAddr(exp(type(_,Sz), _), Addr, S) % Anything else: need a temporary
<-> allocTemp1(Sz, Addr, S).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% allocAddrNoReg/3: Allocate an address for the result of an expression.
% Don't allow registers.
%
allocAddrNoReg(_, Addr, S) % Destination already known
! <= nonvar(Addr).
allocAddrNoReg(exp(type(map(_,_), Sz), id(X)), address(X), S)
! <= nonvar(X).
allocAddrNoReg(exp(_, id(X)), Addr, S) % In case it's a named symbol
<-> lookup1(address(Addr), A)
<= nonvar(X), lookup(id(X)-A, S).
allocAddrNoReg(exp(_, lit(X)), lit(X), S) % A literal: take it as it is
! <= nonvar(X).
allocAddrNoReg(exp(type(_,Sz), _), Addr, S) % Anything else: need a temporary
<-> allocTempNoReg1(Sz, Addr, S).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% freeAddr/2: Free an address in case it's a temporary.
%
freeAddr(t(Sz, A, L), S) ! <= freeTemp(t(Sz, A, L), S).
freeAddr(_, S) !.
/*****************************************************************************/
/* */
/* Projecto de Compiladores ---------------------------------- VSPL */
/* Level 0 */
/* */
/* Code generation (utilities). */
/* */
/* Salvador Pinto Abreu */
/* */
/*****************************************************************************/
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% allocTemp1/3: allocate a temporary if it's not already chosen.
%
allocTemp1(Sz, Temp, S) ! <= nonvar(Temp).
allocTemp1(Sz, Temp, S) <-> allocTemp(Sz, Temp, S).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% allocTempNoReg1/3: allocate a temporary if it's not already chosen. Avoid
% registers.
%
allocTempNoReg1(Sz, Temp, S) ! <= nonvar(Temp).
allocTempNoReg1(Sz, Temp, S) <-> allocTempNoReg(Sz, Temp, S).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% getRelOpcode/2: Obtain VAX opcode for relationals.
%
getRelOpcode(le, jleq).
getRelOpcode(lt, jlss).
getRelOpcode(eq, jeql).
getRelOpcode(ne, jneq).
getRelOpcode(ge, jgeq).
getRelOpcode(gt, jgtr).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% getInvRelOpcode/2: Obtain inverse VAX opcode for relationals.
%
getInvRelOpcode(le, jgtr).
getInvRelOpcode(lt, jgeq).
getInvRelOpcode(eq, jneq).
getInvRelOpcode(ne, jeql).
getInvRelOpcode(ge, jlss).
getInvRelOpcode(gt, jleq).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% genLabel/1: Generate a unique label.
%
resetLabels(Root) <-> try retract(curLabel(Root,_)), asserta(curLabel(Root,0)).
newLabel(Root, N) <-> retract(curLabel(Root,M)), N is M+1,
assert(curLabel(Root,N)).
genLabel(R, N, L) <-> name(R, RN), name(N, NN),
append("L", RN, X0), append(X0, "_", X1),
append(X1, NN, X2), name(L, X2).
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