"_pdata",
"_idata",
"_naked",
+ "_overlay",
NULL
};
return FALSE;
}
+/* Generate code to copy XINIT to XISEG */
+static void _mcs51_genXINIT (FILE * of) {
+ fprintf (of, "; _mcs51_genXINIT() start\n");
+ fprintf (of, " mov a,#l_XINIT\n");
+ fprintf (of, " orl a,#l_XINIT>>8\n");
+ fprintf (of, " jz 00003$\n");
+ fprintf (of, " mov a,#s_XINIT\n");
+ fprintf (of, " add a,#l_XINIT\n");
+ fprintf (of, " mov r1,a\n");
+ fprintf (of, " mov a,#s_XINIT>>8\n");
+ fprintf (of, " addc a,#l_XINIT>>8\n");
+ fprintf (of, " mov r2,a\n");
+ fprintf (of, " mov dptr,#s_XINIT\n");
+ fprintf (of, " mov r0,#s_XISEG\n");
+ fprintf (of, " mov p2,#(s_XISEG >> 8)\n");
+ fprintf (of, "00001$: clr a\n");
+ fprintf (of, " movc a,@a+dptr\n");
+ fprintf (of, " movx @r0,a\n");
+ fprintf (of, " inc dptr\n");
+ fprintf (of, " inc r0\n");
+ fprintf (of, " cjne r0,#0,00002$\n");
+ fprintf (of, " inc p2\n");
+ fprintf (of, "00002$: mov a,dpl\n");
+ fprintf (of, " cjne a,ar1,00001$\n");
+ fprintf (of, " mov a,dph\n");
+ fprintf (of, " cjne a,ar2,00001$\n");
+ fprintf (of, " mov p2,#0xFF\n");
+ fprintf (of, "00003$:\n");
+ fprintf (of, "; _mcs51_genXINIT() end\n");
+}
+
+
+/* Do CSE estimation */
+static bool cseCostEstimation (iCode *ic, iCode *pdic)
+{
+ operand *result = IC_RESULT(ic);
+ sym_link *result_type = operandType(result);
+
+ /* if it is a pointer then return ok for now */
+ if (IC_RESULT(ic) && IS_PTR(result_type)) return 1;
+
+ /* if bitwise | add & subtract then no since mcs51 is pretty good at it
+ so we will cse only if they are local (i.e. both ic & pdic belong to
+ the same basic block */
+ if (IS_BITWISE_OP(ic) || ic->op == '+' || ic->op == '-') {
+ /* then if they are the same Basic block then ok */
+ if (ic->eBBlockNum == pdic->eBBlockNum) return 1;
+ else return 0;
+ }
+
+ /* for others it is cheaper to do the cse */
+ return 1;
+}
+
/** $1 is always the basename.
$2 is always the output file.
$3 varies
*/
static const char *_linkCmd[] =
{
- "aslink", "-nf", "$1", NULL
+ "{bindir}{sep}aslink", "-nf", "$1", NULL
};
/* $3 is replaced by assembler.debug_opts resp. port->assembler.plain_opts */
"-plosgffc", /* Options with debug */
"-plosgff", /* Options without debug */
0,
- ".asm"
+ ".asm",
+ NULL /* no do_assemble function */
},
{
_linkCmd,
"GSINIT (CODE)",
"OSEG (OVR,DATA)",
"GSFINAL (CODE)",
- "HOME (CODE)",
+ "HOME (CODE)",
+ "XISEG (XDATA)", // initialized xdata
+ "XINIT (CODE)", // a code copy of xiseg
NULL,
NULL,
1
_mcs51_getRegName,
_mcs51_keywords,
_mcs51_genAssemblerPreamble,
+ NULL, /* no genAssemblerEnd */
_mcs51_genIVT,
+ _mcs51_genXINIT,
_mcs51_reset_regparm,
_mcs51_regparm,
NULL,
NULL,
+ NULL,
FALSE,
0, /* leave lt */
0, /* leave gt */
1, /* transform != to !(a == b) */
0, /* leave == */
FALSE, /* No array initializer support. */
+ cseCostEstimation,
+ NULL, /* no builtin functions */
+ GPOINTER, /* treat unqualified pointers as "generic" pointers */
+ 1, /* reset labelKey to 1 */
+ 1, /* globals & local static allowed */
PORT_MAGIC
};