127 lines
3.2 KiB
C
127 lines
3.2 KiB
C
/****************************************************************
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* *
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* Copyright 2001, 2011 Fidelity Information Services, Inc *
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* *
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* This source code contains the intellectual property *
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* of its copyright holder(s), and is made available *
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* under a license. If you do not know the terms of *
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* the license, please stop and do not read further. *
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* *
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****************************************************************/
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#include "mdef.h"
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#include "compiler.h"
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#include "opcode.h"
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#include "toktyp.h"
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#include "mdq.h"
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#include "mmemory.h"
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#include "advancewindow.h"
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GBLREF char window_token;
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LITREF octabstruct oc_tab[];
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int f_select( oprtype *a, opctype op )
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{
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triple tmpchain, *oldchain, *ref, *r, *save_start, *save_start_orig, *triptr;
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oprtype *cnd, tmparg, endtrip, target;
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opctype old_op;
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unsigned int save_depth;
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boolean_t first_time, save_shift;
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error_def(ERR_COLON);
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error_def(ERR_SELECTFALSE);
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DCL_THREADGBL_ACCESS;
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SETUP_THREADGBL_ACCESS;
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save_shift = TREF(shift_side_effects);
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save_depth = TREF(expr_depth);
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save_start = TREF(expr_start);
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save_start_orig = TREF(expr_start_orig);
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TREF(shift_side_effects) = FALSE;
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TREF(expr_depth) = 0;
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TREF(expr_start) = TREF(expr_start_orig) = NULL;
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if (save_shift)
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{
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dqinit(&tmpchain, exorder);
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oldchain = setcurtchain(&tmpchain);
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}
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r = maketriple(op);
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first_time = TRUE;
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endtrip = put_tjmp(r);
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for (;;)
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{
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cnd = (oprtype *)mcalloc(SIZEOF(oprtype));
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if (!bool_expr((bool) FALSE, cnd))
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{
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if (save_shift)
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setcurtchain(oldchain);
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return FALSE;
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}
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if (TK_COLON != window_token)
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{
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if (save_shift)
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setcurtchain(oldchain);
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stx_error(ERR_COLON);
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return FALSE;
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}
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advancewindow();
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if (!expr(&tmparg))
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{
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if (save_shift)
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setcurtchain(oldchain);
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return FALSE;
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}
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assert(TRIP_REF == tmparg.oprclass);
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old_op = tmparg.oprval.tref->opcode;
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if (first_time)
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{
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if ((OC_LIT == old_op) || (oc_tab[old_op].octype & OCT_MVADDR))
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{
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ref = newtriple(OC_STOTEMP);
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ref->operand[0] = tmparg;
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tmparg = put_tref(ref);
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}
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r->operand[0] = target = tmparg;
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first_time = FALSE;
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} else
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{
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ref = newtriple(OC_STO);
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ref->operand[0] = target;
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ref->operand[1] = tmparg;
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if (OC_PASSTHRU == tmparg.oprval.tref->opcode)
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{
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assert(TRIP_REF == tmparg.oprval.tref->operand[0].oprclass);
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ref = newtriple(OC_STO);
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ref->operand[0] = target;
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ref->operand[1] = put_tref(tmparg.oprval.tref->operand[0].oprval.tref);
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}
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}
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ref = newtriple(OC_JMP);
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ref->operand[0] = endtrip;
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tnxtarg(cnd);
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if (TK_COMMA != window_token)
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break;
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advancewindow();
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}
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tmparg = put_ilit(ERR_SELECTFALSE);
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ref = newtriple(OC_RTERROR);
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ref->operand[0] = tmparg;
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ref->operand[1] = put_ilit(FALSE); /* Not a subroutine reference */
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ins_triple(r);
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assert(!TREF(expr_depth));
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TREF(shift_side_effects) = save_shift;
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TREF(expr_depth) = save_depth;
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TREF(expr_start) = save_start;
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TREF(expr_start_orig) = save_start_orig;
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if (save_shift)
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{
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newtriple(OC_GVSAVTARG);
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setcurtchain(oldchain);
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dqadd(TREF(expr_start), &tmpchain, exorder);
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TREF(expr_start) = tmpchain.exorder.bl;
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triptr = newtriple(OC_GVRECTARG);
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triptr->operand[0] = put_tref(TREF(expr_start));
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}
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*a = put_tref(r);
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return TRUE;
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}
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