955 lines
20 KiB
C
955 lines
20 KiB
C
/*
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* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
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* See the copyright notice in the ACK home directory, in the file "Copyright".
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*/
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/* $Header$ */
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/* EXPRESSION-CODE GENERATOR */
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#include "nofloat.h"
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#include <em.h>
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#include <em_reg.h>
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#include "debug.h"
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#include "nobitfield.h"
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#include "dataflow.h"
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#include "arith.h"
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#include "type.h"
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#include "idf.h"
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#include "label.h"
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#include "code.h"
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#include "assert.h"
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#include "def.h"
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#include "expr.h"
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#include "sizes.h"
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#include "Lpars.h"
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#include "level.h"
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#include "stack.h"
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#include "align.h"
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#include "mes.h"
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#include "atw.h"
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#define CRASH() crash("EVAL: CRASH at line %u", __LINE__)
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#define toword(n) ((n) < word_size ? word_size : (n))
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char *symbol2str();
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char *long2str();
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arith NewLocal(); /* util.c */
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#define LocalPtrVar() NewLocal(pointer_size, pointer_align, reg_pointer, 0)
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/* EVAL() is the main expression-tree evaluator, which turns
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any legal expression tree into EM code. Parameters:
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struct expr *expr
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pointer to root of the expression tree to be evaluated
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int val
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indicates whether the resulting expression is to be
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dereferenced (if val == RVAL and expr->ex_lvalue == 1)
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or not (val == LVAL). The latter case indicates that
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the resulting expression is an lvalue expression which
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should not be dereferenced by EVAL
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int code
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indicates whether the expression tree must be turned
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into EM code or not. E.g. the expression statement "12;"
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delivers the expression "12" to EVAL while this should
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not result in any EM code
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label false_label, label true_label
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if the expression is a logical or relational expression
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and if the loop of the program depends on the resulting
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value then EVAL generates jumps to the specified program
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labels, in case they are specified (i.e. are non-zero)
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*/
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EVAL(expr, val, code, true_label, false_label)
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register struct expr *expr;
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int val, code;
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label true_label, false_label;
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{
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register int gencode = (code == TRUE);
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switch (expr->ex_class) {
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case Value: /* just a simple value */
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if (gencode)
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load_val(expr, val);
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break;
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case String: /* a string constant */
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if (gencode) {
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string2pointer(expr);
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C_lae_dlb(expr->VL_LBL, expr->VL_VALUE);
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}
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break;
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#ifndef NOFLOAT
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case Float: /* a floating constant */
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if (gencode) {
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label datlab = data_label();
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C_df_dlb(datlab);
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C_rom_fcon(expr->FL_VALUE, expr->ex_type->tp_size);
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C_lae_dlb(datlab, (arith)0);
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C_loi(expr->ex_type->tp_size);
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}
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break;
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#endif NOFLOAT
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case Oper: /* compound expression */
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{
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int oper = expr->OP_OPER;
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register struct expr *left = expr->OP_LEFT;
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register struct expr *right = expr->OP_RIGHT;
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register struct type *tp = expr->OP_TYPE;
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if (tp->tp_fund == ERRONEOUS || (expr->ex_flags & EX_ERROR)) {
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/* stop immediately */
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break;
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}
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if (tp->tp_fund == VOID)
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gencode = 0;
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switch (oper) {
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case '+':
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/* We have the following possibilities :
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int + int, pointer + int, pointer + long,
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long + long, double + double
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*/
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EVAL(left, RVAL, gencode, NO_LABEL, NO_LABEL);
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EVAL(right, RVAL, gencode, NO_LABEL, NO_LABEL);
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if (gencode) {
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switch (tp->tp_fund) {
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case INT:
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case LONG:
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if (tp->tp_unsigned)
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C_adu(tp->tp_size);
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else
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C_adi(tp->tp_size);
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break;
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case POINTER:
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C_loc(right->ex_type->tp_size);
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C_loc(pointer_size);
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C_cuu();
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C_ads(pointer_size);
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break;
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#ifndef NOFLOAT
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case DOUBLE:
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C_adf(tp->tp_size);
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break;
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#endif NOFLOAT
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default:
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crash("bad type +");
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}
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}
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break;
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case '-':
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if (left == 0) { /* unary */
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EVAL(right, RVAL, gencode, NO_LABEL, NO_LABEL);
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if (gencode) {
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switch (tp->tp_fund) {
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case INT:
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case LONG:
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case POINTER:
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C_ngi(tp->tp_size);
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break;
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#ifndef NOFLOAT
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case DOUBLE:
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C_ngf(tp->tp_size);
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break;
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#endif NOFLOAT
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default:
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CRASH();
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}
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}
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break;
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}
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/* else binary; we have the following flavours:
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int - int, pointer - int, pointer - long,
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pointer - pointer, long - long, double - double
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*/
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EVAL(left, RVAL, gencode, NO_LABEL, NO_LABEL);
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EVAL(right, RVAL, gencode, NO_LABEL, NO_LABEL);
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if (!gencode)
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break;
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switch (tp->tp_fund) {
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case INT:
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case LONG:
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if (tp->tp_unsigned)
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C_sbu(tp->tp_size);
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else
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C_sbi(tp->tp_size);
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break;
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case POINTER:
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if (right->ex_type->tp_fund == POINTER)
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C_sbs(pointer_size);
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else {
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C_ngi(right->ex_type->tp_size);
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C_loc(right->ex_type->tp_size);
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C_loc(pointer_size);
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C_cuu();
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C_ads(pointer_size);
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}
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break;
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#ifndef NOFLOAT
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case DOUBLE:
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C_sbf(tp->tp_size);
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break;
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#endif NOFLOAT
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default:
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crash("bad type -");
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}
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break;
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case '*':
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if (left == 0) /* unary */
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EVAL(right, RVAL, gencode, NO_LABEL, NO_LABEL);
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else { /* binary */
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EVAL(left, RVAL, gencode, NO_LABEL, NO_LABEL);
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EVAL(right, RVAL, gencode, NO_LABEL, NO_LABEL);
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if (gencode)
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switch (tp->tp_fund) {
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case INT:
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case LONG:
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case POINTER:
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if (tp->tp_unsigned)
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C_mlu(tp->tp_size);
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else
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C_mli(tp->tp_size);
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break;
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#ifndef NOFLOAT
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case DOUBLE:
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C_mlf(double_size);
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break;
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#endif NOFLOAT
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default:
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crash("bad type *");
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}
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}
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break;
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case '/':
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EVAL(left, RVAL, gencode, NO_LABEL, NO_LABEL);
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EVAL(right, RVAL, gencode, NO_LABEL, NO_LABEL);
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if (gencode)
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switch (tp->tp_fund) {
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case INT:
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case LONG:
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case POINTER:
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if (tp->tp_unsigned)
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C_dvu(tp->tp_size);
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else
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C_dvi(tp->tp_size);
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break;
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#ifndef NOFLOAT
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case DOUBLE:
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C_dvf(double_size);
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break;
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#endif NOFLOAT
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default:
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crash("bad type /");
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}
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break;
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case '%':
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EVAL(left, RVAL, gencode, NO_LABEL, NO_LABEL);
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EVAL(right, RVAL, gencode, NO_LABEL, NO_LABEL);
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ASSERT(tp->tp_fund==INT || tp->tp_fund==LONG);
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if (gencode)
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if (tp->tp_unsigned)
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C_rmu(tp->tp_size);
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else
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C_rmi(tp->tp_size);
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break;
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case LEFT:
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EVAL(left, RVAL, gencode, NO_LABEL, NO_LABEL);
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EVAL(right, RVAL, gencode, NO_LABEL, NO_LABEL);
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if (gencode)
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if (tp->tp_unsigned)
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C_slu(tp->tp_size);
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else
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C_sli(tp->tp_size);
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break;
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case RIGHT:
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EVAL(left, RVAL, gencode, NO_LABEL, NO_LABEL);
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EVAL(right, RVAL, gencode, NO_LABEL, NO_LABEL);
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if (gencode)
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if (tp->tp_unsigned)
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C_sru(tp->tp_size);
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else
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C_sri(tp->tp_size);
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break;
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case '<':
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case LESSEQ:
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case '>':
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case GREATEREQ:
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case EQUAL:
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case NOTEQUAL:
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EVAL(left, RVAL, gencode, NO_LABEL, NO_LABEL);
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EVAL(right, RVAL, gencode, NO_LABEL, NO_LABEL);
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if (gencode) {
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/* The operands have the same type */
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arith size = left->ex_type->tp_size;
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switch (tp->tp_fund) {
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case INT:
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case LONG:
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if (left->ex_type->tp_unsigned)
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C_cmu(size);
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else
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C_cmi(size);
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break;
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#ifndef NOFLOAT
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case FLOAT: /* thought they were converted??? */
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case DOUBLE:
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C_cmf(size);
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break;
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#endif NOFLOAT
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case POINTER:
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C_cmp();
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break;
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case ENUM:
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C_cmi(size);
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break;
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default:
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CRASH();
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}
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if (true_label != 0) {
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compare(oper, true_label);
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C_bra(false_label);
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}
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else {
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truthvalue(oper);
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}
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}
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break;
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case '&':
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case '|':
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case '^':
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/* both operands should have type int */
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EVAL(left, RVAL, gencode, NO_LABEL, NO_LABEL);
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EVAL(right, RVAL, gencode, NO_LABEL, NO_LABEL);
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if (gencode) {
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arith size = tp->tp_size;
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if (size < word_size)
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size = word_size;
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switch (oper) {
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case '&':
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C_and(size);
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break;
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case '|':
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C_ior(size);
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break;
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case '^':
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C_xor(size);
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break;
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}
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}
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break;
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case '=': {
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int newcode = tp->tp_size > 0; /* CJ */
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#ifndef NOBITFIELD
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if (left->ex_type->tp_fund == FIELD) {
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eval_field(expr, gencode);
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break;
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}
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#endif NOBITFIELD
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EVAL(right, RVAL, newcode, NO_LABEL, NO_LABEL);
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if (gencode)
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C_dup(ATW(tp->tp_size));
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if (left->ex_class != Value) {
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EVAL(left, LVAL, newcode, NO_LABEL, NO_LABEL);
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if (newcode)
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store_block(tp->tp_size, tp->tp_align);
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}
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else if (newcode)
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store_val(&(left->ex_object.ex_value),
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left->ex_type);
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}
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break;
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case PLUSAB:
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case MINAB:
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case TIMESAB:
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case DIVAB:
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case MODAB:
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case LEFTAB:
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case RIGHTAB:
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case ANDAB:
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case XORAB:
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case ORAB:
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case POSTINCR:
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case POSTDECR:
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case PLUSPLUS:
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case MINMIN:
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{
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arith tmp;
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int compl; /* Complexity of left operand */
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int newcode = left->ex_type->tp_size > 0; /* CJ */
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#ifndef NOBITFIELD
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if (left->ex_type->tp_fund == FIELD) {
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eval_field(expr, gencode);
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break;
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}
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#endif NOBITFIELD
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if (newcode && left->ex_class == Value) {
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compl = 0; /* Value */
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load_val(left, RVAL);
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}
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else
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if (left->ex_depth == 1 &&
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!(left->ex_flags & EX_SIDEEFFECTS)) {
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compl = 1;
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EVAL(left, RVAL, newcode, NO_LABEL, NO_LABEL);
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}
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else {
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compl = 2; /* otherwise */
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EVAL(left, LVAL, newcode, NO_LABEL, NO_LABEL);
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if (newcode) {
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tmp = LocalPtrVar();
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C_dup(pointer_size);
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StoreLocal(tmp, pointer_size);
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C_loi(left->ex_type->tp_size);
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}
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}
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if (newcode) {
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if (gencode && (oper == POSTINCR ||
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oper == POSTDECR))
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C_dup(ATW(left->ex_type->tp_size));
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conversion(left->ex_type, tp);
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}
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EVAL(right, RVAL, newcode, NO_LABEL, NO_LABEL);
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if (newcode) {
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int dupval = gencode && oper != POSTINCR &&
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oper != POSTDECR;
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assop(tp, oper);
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conversion(tp, left->ex_type);
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if (compl == 0) {
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store_val(&(left->ex_object.ex_value),
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left->ex_type);
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if (dupval) load_val(left, RVAL);
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}
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else if (compl == 1) {
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EVAL(left, LVAL,1, NO_LABEL, NO_LABEL);
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C_sti(left->ex_type->tp_size);
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if (dupval) {
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EVAL(left, LVAL, 1, NO_LABEL,
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NO_LABEL);
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C_loi(left->ex_type->tp_size);
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}
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}
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else {
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LoadLocal(tmp, pointer_size);
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C_sti(left->ex_type->tp_size);
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if (dupval) {
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LoadLocal(tmp, pointer_size);
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C_loi(left->ex_type->tp_size);
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}
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FreeLocal(tmp);
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}
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}
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break;
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}
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case '(':
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{
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register struct expr *ex;
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arith ParSize = (arith)0;
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if ((ex = right) != NILEXPR) {
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/* function call with parameters*/
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while ( ex->ex_class == Oper &&
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ex->OP_OPER == PARCOMMA
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) {
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EVAL(ex->OP_RIGHT, RVAL,
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ex->ex_type->tp_size > 0,
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NO_LABEL, NO_LABEL);
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ParSize += ATW(ex->ex_type->tp_size);
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ex = ex->OP_LEFT;
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}
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EVAL(ex, RVAL, ex->ex_type->tp_size > 0,
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NO_LABEL, NO_LABEL);
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ParSize += ATW(ex->ex_type->tp_size);
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}
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if (left->ex_class == Value && left->VL_CLASS == Name) {
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/* e.g., main() { (*((int (*)())0))(); } */
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C_cal(left->VL_IDF->id_text);
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#ifdef DATAFLOW
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{ extern char options[];
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if (options['d'])
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DfaCallFunction(
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left->VL_IDF->id_text);
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}
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#endif DATAFLOW
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}
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else {
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EVAL(left, LVAL, TRUE, NO_LABEL, NO_LABEL);
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C_cai();
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}
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/* remove parameters from stack */
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if (ParSize > (arith)0)
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C_asp(ParSize);
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if (gencode) {
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if (is_struct_or_union(tp->tp_fund)) {
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C_lfr(pointer_size);
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load_block(tp->tp_size, (int) word_size);
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}
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else
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C_lfr(ATW(tp->tp_size));
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}
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break;
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}
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case '.':
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EVAL(left, LVAL, gencode, NO_LABEL, NO_LABEL);
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ASSERT(is_cp_cst(right));
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if (gencode)
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C_adp(right->VL_VALUE);
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break;
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case ARROW:
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EVAL(left, RVAL, gencode, NO_LABEL, NO_LABEL);
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ASSERT(is_cp_cst(right));
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if (gencode)
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C_adp(right->VL_VALUE);
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break;
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case ',':
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EVAL(left, RVAL, FALSE, NO_LABEL, NO_LABEL);
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EVAL(right, RVAL, gencode, NO_LABEL, NO_LABEL);
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break;
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case '~':
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EVAL(right, RVAL, gencode, NO_LABEL, NO_LABEL);
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if (gencode)
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C_com(tp->tp_size);
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break;
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case '?': /* must be followed by ':' */
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{
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label l_true = text_label();
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label l_false = text_label();
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label l_end = text_label();
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EVAL(left, RVAL, TRUE, l_true, l_false);
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C_df_ilb(l_true);
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EVAL(right->OP_LEFT, RVAL, gencode, NO_LABEL, NO_LABEL);
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C_bra(l_end);
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C_df_ilb(l_false);
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EVAL(right->OP_RIGHT, RVAL, gencode, NO_LABEL, NO_LABEL);
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C_df_ilb(l_end);
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break;
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}
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case OR:
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case AND: {
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label l_false, l_true, l_maybe;
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l_maybe = text_label();
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if (true_label) {
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l_false = false_label;
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l_true = true_label;
|
|
}
|
|
else {
|
|
l_false = text_label();
|
|
l_true = gencode ? text_label(): l_false;
|
|
}
|
|
|
|
EVAL(left, RVAL, TRUE, oper == AND ? l_maybe : l_true,
|
|
oper == AND ? l_false : l_maybe);
|
|
C_df_ilb(l_maybe);
|
|
EVAL(right, RVAL, gencode, l_true, l_false);
|
|
if (gencode && !true_label) {
|
|
label l_end = text_label();
|
|
|
|
C_df_ilb(l_true);
|
|
C_loc((arith)1);
|
|
C_bra(l_end);
|
|
C_df_ilb(l_false);
|
|
C_loc((arith)0);
|
|
C_df_ilb(l_end);
|
|
}
|
|
else {
|
|
if (! true_label) C_df_ilb(l_false);
|
|
}
|
|
}
|
|
break;
|
|
case '!':
|
|
if (true_label == 0) {
|
|
EVAL(right, RVAL, gencode, NO_LABEL, NO_LABEL);
|
|
if (gencode) {
|
|
C_teq();
|
|
}
|
|
}
|
|
else
|
|
EVAL(right, RVAL, gencode, false_label,
|
|
true_label);
|
|
break;
|
|
case INT2INT:
|
|
#ifndef NOFLOAT
|
|
case INT2FLOAT:
|
|
case FLOAT2INT:
|
|
case FLOAT2FLOAT:
|
|
#endif NOFLOAT
|
|
EVAL(right, RVAL, gencode, NO_LABEL, NO_LABEL);
|
|
if (gencode)
|
|
conversion(right->ex_type, left->ex_type);
|
|
break;
|
|
default:
|
|
crash("(EVAL) bad operator %s\n", symbol2str(oper));
|
|
}
|
|
/* If the rvalue of the expression is required but
|
|
only its lvalue is evaluated, its rvalue is
|
|
loaded by the following statements:
|
|
*/
|
|
if (gencode && val == RVAL && expr->ex_lvalue == 1)
|
|
load_block(expr->ex_type->tp_size,
|
|
expr->ex_type->tp_align);
|
|
break;
|
|
}
|
|
default:
|
|
crash("(EVAL) bad expression class");
|
|
}
|
|
}
|
|
|
|
/* compare() serves as an auxiliary function of EVAL */
|
|
compare(relop, lbl)
|
|
int relop;
|
|
label lbl;
|
|
{
|
|
switch (relop) {
|
|
case '<':
|
|
C_zlt(lbl);
|
|
break;
|
|
case LESSEQ:
|
|
C_zle(lbl);
|
|
break;
|
|
case '>':
|
|
C_zgt(lbl);
|
|
break;
|
|
case GREATEREQ:
|
|
C_zge(lbl);
|
|
break;
|
|
case EQUAL:
|
|
C_zeq(lbl);
|
|
break;
|
|
case NOTEQUAL:
|
|
C_zne(lbl);
|
|
break;
|
|
default:
|
|
CRASH();
|
|
}
|
|
}
|
|
|
|
/* truthvalue() serves as an auxiliary function of EVAL */
|
|
truthvalue(relop)
|
|
int relop;
|
|
{
|
|
switch (relop) {
|
|
case '<':
|
|
C_tlt();
|
|
break;
|
|
case LESSEQ:
|
|
C_tle();
|
|
break;
|
|
case '>':
|
|
C_tgt();
|
|
break;
|
|
case GREATEREQ:
|
|
C_tge();
|
|
break;
|
|
case EQUAL:
|
|
C_teq();
|
|
break;
|
|
case NOTEQUAL:
|
|
C_tne();
|
|
break;
|
|
default:
|
|
CRASH();
|
|
}
|
|
}
|
|
|
|
|
|
/* assop() generates the opcode of an assignment operators op= */
|
|
assop(type, oper)
|
|
register struct type *type;
|
|
int oper;
|
|
{
|
|
register arith size;
|
|
register uns = type->tp_unsigned;
|
|
|
|
if ((size = type->tp_size) < word_size)
|
|
size = word_size;
|
|
switch (type->tp_fund) {
|
|
case CHAR:
|
|
case SHORT:
|
|
case INT:
|
|
case LONG:
|
|
case ENUM:
|
|
switch (oper) {
|
|
case PLUSAB:
|
|
case PLUSPLUS:
|
|
case POSTINCR:
|
|
if (uns)
|
|
C_adu(size);
|
|
else
|
|
C_adi(size);
|
|
break;
|
|
case MINAB:
|
|
case MINMIN:
|
|
case POSTDECR:
|
|
if (uns)
|
|
C_sbu(size);
|
|
else
|
|
C_sbi(size);
|
|
break;
|
|
case TIMESAB:
|
|
if (uns)
|
|
C_mlu(size);
|
|
else
|
|
C_mli(size);
|
|
break;
|
|
case DIVAB:
|
|
if (uns)
|
|
C_dvu(size);
|
|
else
|
|
C_dvi(size);
|
|
break;
|
|
case MODAB:
|
|
if (uns)
|
|
C_rmu(size);
|
|
else
|
|
C_rmi(size);
|
|
break;
|
|
case LEFTAB:
|
|
if (uns)
|
|
C_slu(size);
|
|
else
|
|
C_sli(size);
|
|
break;
|
|
case RIGHTAB:
|
|
if (uns)
|
|
C_sru(size);
|
|
else
|
|
C_sri(size);
|
|
break;
|
|
case ANDAB:
|
|
C_and(size);
|
|
break;
|
|
case XORAB:
|
|
C_xor(size);
|
|
break;
|
|
case ORAB:
|
|
C_ior(size);
|
|
break;
|
|
}
|
|
break;
|
|
#ifndef NOFLOAT
|
|
case FLOAT:
|
|
case DOUBLE:
|
|
switch (oper) {
|
|
case PLUSAB:
|
|
case PLUSPLUS:
|
|
case POSTINCR:
|
|
C_adf(size);
|
|
break;
|
|
case MINAB:
|
|
case MINMIN:
|
|
case POSTDECR:
|
|
C_sbf(size);
|
|
break;
|
|
case TIMESAB:
|
|
C_mlf(size);
|
|
break;
|
|
case DIVAB:
|
|
C_dvf(size);
|
|
break;
|
|
}
|
|
break;
|
|
#endif NOFLOAT
|
|
case POINTER:
|
|
if (oper == MINAB || oper == MINMIN || oper == POSTDECR)
|
|
C_ngi(size);
|
|
C_loc(size);
|
|
C_loc(pointer_size);
|
|
C_cuu();
|
|
C_ads(pointer_size);
|
|
break;
|
|
case ERRONEOUS:
|
|
break;
|
|
default:
|
|
crash("(assop) bad type %s\n", symbol2str(type->tp_fund));
|
|
}
|
|
}
|
|
|
|
/* store_val() generates code for a store operation.
|
|
There are four ways of storing data:
|
|
- into a global variable
|
|
- into an automatic local variable
|
|
- into a local static variable
|
|
- absolute addressing
|
|
*/
|
|
store_val(vl, tp)
|
|
register struct value *vl;
|
|
struct type *tp;
|
|
{
|
|
arith size = tp->tp_size;
|
|
int tpalign = tp->tp_align;
|
|
int al_on_word;
|
|
register int inword;
|
|
register int indword;
|
|
arith val = vl->vl_value;
|
|
|
|
if (vl->vl_class == Const) { /* absolute addressing */
|
|
load_cst(val, pointer_size);
|
|
store_block(size, tpalign);
|
|
return;
|
|
}
|
|
al_on_word = (tpalign % word_align == 0);
|
|
if (!(inword = (size == word_size && al_on_word)))
|
|
indword = (size == dword_size && al_on_word);
|
|
if (vl->vl_class == Name) {
|
|
register struct idf *id = vl->vl_data.vl_idf;
|
|
register struct def *df = id->id_def;
|
|
|
|
if (df->df_level == L_GLOBAL) {
|
|
if (inword)
|
|
C_ste_dnam(id->id_text, val);
|
|
else
|
|
if (indword)
|
|
C_sde_dnam(id->id_text, val);
|
|
else {
|
|
C_lae_dnam(id->id_text, val);
|
|
store_block(size, tpalign);
|
|
}
|
|
}
|
|
else {
|
|
ASSERT(df->df_sc != STATIC);
|
|
if (inword || indword)
|
|
StoreLocal(df->df_address + val, size);
|
|
else {
|
|
AddrLocal(df->df_address + val);
|
|
store_block(size, tpalign);
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
label dlb = vl->vl_data.vl_lbl;
|
|
|
|
ASSERT(vl->vl_class == Label);
|
|
if (inword)
|
|
C_ste_dlb(dlb, val);
|
|
else
|
|
if (indword)
|
|
C_sde_dlb(dlb, val);
|
|
else {
|
|
C_lae_dlb(dlb, val);
|
|
store_block(size, tpalign);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/* load_val() generates code for stacking a certain value (from ex),
|
|
which can be obtained in one of the following ways:
|
|
- value from absolute addressed memory
|
|
- constant value
|
|
- function result
|
|
- global variable
|
|
- static variable
|
|
- local variable
|
|
*/
|
|
load_val(expr, rlval)
|
|
register struct expr *expr; /* expression containing the value */
|
|
int rlval; /* generate either LVAL or RVAL */
|
|
{
|
|
register struct type *tp = expr->ex_type;
|
|
int rvalue = (rlval == RVAL && expr->ex_lvalue != 0);
|
|
arith size = tp->tp_size;
|
|
int tpalign = tp->tp_align;
|
|
int al_on_word;
|
|
register int inword, indword;
|
|
register arith val = expr->VL_VALUE;
|
|
|
|
if (expr->VL_CLASS == Const) {
|
|
if (rvalue) { /* absolute addressing */
|
|
load_cst(val, pointer_size);
|
|
load_block(size, tpalign);
|
|
}
|
|
else /* integer, unsigned, long, enum etc */
|
|
load_cst(val, size);
|
|
return;
|
|
}
|
|
if (rvalue) {
|
|
al_on_word = (tpalign % word_align == 0);
|
|
if (!(inword = (size == word_size && al_on_word)))
|
|
indword = (size == dword_size && al_on_word);
|
|
}
|
|
if (expr->VL_CLASS == Label) {
|
|
if (rvalue) {
|
|
if (inword)
|
|
C_loe_dlb(expr->VL_LBL, val);
|
|
else
|
|
if (indword)
|
|
C_lde_dlb(expr->VL_LBL, val);
|
|
else {
|
|
C_lae_dlb(expr->VL_LBL, val);
|
|
load_block(size, tpalign);
|
|
}
|
|
|
|
}
|
|
else {
|
|
C_lae_dlb(expr->VL_LBL, (arith)0);
|
|
C_adp(val);
|
|
}
|
|
}
|
|
else {
|
|
register struct idf *id = expr->VL_IDF;
|
|
register struct def *df;
|
|
|
|
ASSERT(expr->VL_CLASS == Name);
|
|
if ((df = id->id_def)->df_type->tp_fund == FUNCTION)
|
|
/* the previous statement tried to catch a function
|
|
identifier, which may be cast to a pointer to a
|
|
function.
|
|
ASSERT(!(rvalue)); ???
|
|
*/
|
|
C_lpi(id->id_text);
|
|
else
|
|
if (df->df_level == L_GLOBAL) {
|
|
if (rvalue) {
|
|
if (inword)
|
|
C_loe_dnam(id->id_text, val);
|
|
else
|
|
if (indword)
|
|
C_lde_dnam(id->id_text, val);
|
|
else {
|
|
C_lae_dnam(id->id_text, val);
|
|
load_block(size, tpalign);
|
|
}
|
|
}
|
|
else {
|
|
C_lae_dnam(id->id_text, (arith)0);
|
|
C_adp(val);
|
|
}
|
|
}
|
|
else {
|
|
ASSERT(df->df_sc != STATIC);
|
|
if (rvalue) {
|
|
if (inword || indword)
|
|
LoadLocal(df->df_address + val, size);
|
|
else {
|
|
AddrLocal(df->df_address + val);
|
|
load_block(size, tpalign);
|
|
}
|
|
}
|
|
else {
|
|
AddrLocal(df->df_address);
|
|
C_adp(val);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
load_cst(val, siz)
|
|
arith val, siz;
|
|
{
|
|
if (siz <= word_size)
|
|
C_loc(val);
|
|
else
|
|
if (siz == dword_size)
|
|
C_ldc(val);
|
|
else {
|
|
label datlab;
|
|
|
|
C_df_dlb(datlab = data_label());
|
|
C_rom_icon(long2str((long)val, 10), siz);
|
|
C_lae_dlb(datlab, (arith)0);
|
|
C_loi(siz);
|
|
}
|
|
}
|