1 line
31 KiB
ObjectPascal
1 line
31 KiB
ObjectPascal
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{$optimize -1}
{---------------------------------------------------------------}
{ }
{ ORCA Code Generator Interface }
{ }
{ This unit serves as the glue code attaching a compiler }
{ to the code generator. It provides subroutines in a }
{ format that is convinient for the compiler during }
{ semantic analysis, and produces intermediate code records }
{ as output. These intermediate code records are then }
{ passed on to the code generator for optimization and }
{ native code generation. }
{ }
{$copy 'cgi.comments'}
{---------------------------------------------------------------}
unit CodeGeneratorInterface;
interface
{$segment 'cg'}
{$LibPrefix '0/obj/'}
uses PCommon;
{---------------------------------------------------------------}
const
{Code Generation}
{---------------}
maxLocalLabel = 300; {max # local variables}
maxString = 8000; {max # chars in string space}
{Error interface: these constants map }
{code generator error numbers into the }
{numbers used by the compiler's Error }
{subroutine. }
{--------------------------------------}
cge1 = 113; {compiler error}
cge2 = 111; {implementation restriction: too many local labels}
cge3 = 132; {implementation restriction: string space exhausted}
{size of internal types}
{----------------------}
cgByteSize = 1;
cgWordSize = 2;
cgLongSize = 4;
cgPointerSize = 4;
cgRealSize = 4;
cgDoubleSize = 8;
cgCompSize = 8;
cgExtendedSize = 10;
{token buffer (.int file)}
{------------------------}
{NOTE: tokenBuffSize also defined in objout.asm}
tokenBuffSize = 4095; {size of the token buffer}
type
{misc}
{----}
segNameType = packed array[1..10] of char; {segment name}
{p code}
{------}
pcodes = {pcode names}
(pc_adi,pc_adr,pc_and,pc_dvi,pc_dvr,pc_cnn,pc_cnv,pc_ior,pc_mod,pc_mpi,
pc_mpr,pc_ngi,pc_ngr,pc_not,pc_sbi,pc_sbr,pc_sto,pc_dec,dc_loc,pc_ent,
pc_fjp,pc_inc,pc_ind,pc_ixa,pc_lao,pc_lca,pc_ldo,pc_mov,pc_ret,pc_sro,
pc_xjp,pc_cup,pc_equ,pc_geq,pc_grt,pc_lda,pc_ldc,pc_leq,pc_les,pc_lod,
pc_neq,pc_str,pc_ujp,pc_add,pc_lnm,pc_nam,pc_cui,pc_cum,pc_tjp,dc_lab,
pc_usr,pc_umi,pc_udi,pc_lla,pc_lsl,pc_lad,pc_uim,dc_enp,pc_stk,dc_glb,
dc_dst,dc_str,pc_cop,pc_cpo,pc_tl1,pc_tl2,dc_pin,pc_shl,pc_shr,pc_bnd,
pc_bor,pc_bxr,pc_bnt,pc_bnl,pc_mpl,pc_dvl,pc_mdl,pc_sll,pc_slr,pc_bal,
pc_ngl,pc_adl,pc_sbl,pc_blr,pc_blx,pc_siz,dc_sym,pc_lnd,pc_lor,pc_vsr,
pc_uml,pc_udl,pc_ulm,pc_pds,dc_cns,dc_prm,pc_bno,pc_nop,pc_csp,pc_chk,
pc_abi,pc_abr,pc_abl,pc_sqi,pc_sql,pc_sqr,pc_rnd,pc_rn4,pc_odd,pc_odl,
pc_at2,pc_sgs,pc_uni,pc_pwr,pc_int,pc_dif,pc_inn,pc_prs,pc_fix,dc_fun,
pc_sin,pc_cos,pc_exp,pc_sqt,pc_log,pc_atn,pc_tan,pc_acs,pc_asn,pc_vct);
{intermediate code}
{-----------------}
baseTypeEnum = (cgByte,cgUByte,cgWord,cgUWord,cgLong,cgULong,
cgReal,cgDouble,cgComp,cgExtended,cgString,cgVoid,
cgSet);
setPtr = ^setRecord; {set constant}
setRecord = record
smax: integer;
sval: packed array[1..setsize] of char;
end;
icptr = ^intermediate_code;
intermediate_code = record {intermediate code record}
opcode: pcodes; {operation code}
p,q,r,s: integer; {operands}
lab: pStringPtr; {named label pointer}
next: icptr; {ptr to next statement}
left, right: icptr; {leaves for trees}
parents: integer; {number of parents}
case optype: baseTypeEnum of
cgByte,
cgUByte,
cgWord,
cgUWord : (opnd: longint; llab,slab: integer);
cgLong,
cgULong : (lval,lval2: longint);
cgReal,
cgDouble,
cgComp,
cgExtended : (rval: double);
cgString : (str: pStringPtr);
cgSet : (setp: setPtr);
cgVoid : (pval: longint; pstr: pStringPtr);
end;
{basic blocks}
{------------}
iclist = ^iclistRecord; {used to form lists of records}
iclistRecord = r
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