#include "main.h"
#include "ralloc.h"
#include "gen.h"
+#include "../SDCCutil.h"
static char _defaultRules[] =
{
"_xdata",
"_pdata",
"_idata",
+ "_naked",
+ "_overlay",
NULL
};
static int
_mcs51_regparm (sym_link * l)
{
- /* for this processor it is simple
- can pass only the first parameter in a register */
- if (regParmFlg)
- return 0;
+ if (options.parms_in_bank1 == 0) {
+ /* simple can pass only the first parameter in a register */
+ if (regParmFlg)
+ return 0;
- regParmFlg = 1;
- return 1;
+ regParmFlg = 1;
+ return 1;
+ } else {
+ int size = getSize(l);
+ int remain ;
+
+ /* first one goes the usual way to DPTR */
+ if (regParmFlg == 0) {
+ regParmFlg += 4 ;
+ return 1;
+ }
+ /* second one onwards goes to RB1_0 thru RB1_7 */
+ remain = regParmFlg - 4;
+ if (size > (8 - remain)) {
+ regParmFlg = 12 ;
+ return 0;
+ }
+ regParmFlg += size ;
+ return regParmFlg - size + 1;
+ }
}
static bool
static void
_mcs51_finaliseOptions (void)
{
- /* Hack-o-matic: if we are using the flat24 model,
- * adjust pointer sizes.
- */
- if (options.model == MODEL_FLAT24)
- {
-
- fprintf (stderr, "*** WARNING: you should use the '-mds390' option "
- "for DS80C390 support. This code generator is "
- "badly out of date and probably broken.\n");
+ if (options.noXinitOpt) {
+ port->genXINIT=0;
+ }
- port->s.fptr_size = 3;
- port->s.gptr_size = 4;
- port->stack.isr_overhead++; /* Will save dpx on ISR entry. */
-#if 1
- port->stack.call_overhead++; /* This acounts for the extra byte
- * of return addres on the stack.
- * but is ugly. There must be a
- * better way.
- */
-#endif
- fReturn = fReturn390;
- fReturnSize = 5;
- }
-
- if (options.model == MODEL_LARGE)
- {
+ if (options.model == MODEL_LARGE) {
port->mem.default_local_map = xdata;
port->mem.default_globl_map = xdata;
}
port->mem.default_globl_map = data;
}
- if (options.stack10bit)
- {
- if (options.model != MODEL_FLAT24)
- {
- fprintf (stderr,
- "*** warning: 10 bit stack mode is only supported in flat24 model.\n");
- fprintf (stderr, "\t10 bit stack mode disabled.\n");
- options.stack10bit = 0;
- }
- else
- {
- /* Fixup the memory map for the stack; it is now in
- * far space and requires a FPOINTER to access it.
- */
- istack->fmap = 1;
- istack->ptrType = FPOINTER;
- }
- }
+ if (options.parms_in_bank1) {
+ addSet(&preArgvSet, Safe_strdup("-DSDCC_PARMS_IN_BANK1"));
+ }
}
static void
static void
_mcs51_genAssemblerPreamble (FILE * of)
{
- if (options.model == MODEL_FLAT24)
- {
- fputs (".flat24 on\t\t; 24 bit flat addressing\n", of);
- fputs ("dpx = 0x93\t\t; dpx register unknown to assembler\n", of);
- fputs ("dps = 0x86\t\t; dps register unknown to assembler\n", of);
- fputs ("dpl1 = 0x84\t\t; dpl1 register unknown to assembler\n", of);
- fputs ("dph1 = 0x85\t\t; dph1 register unknown to assembler\n", of);
- fputs ("dpx1 = 0x95\t\t; dpx1 register unknown to assembler\n", of);
+ if (options.parms_in_bank1) {
+ int i ;
+ for (i=0; i < 8 ; i++ )
+ fprintf (of,"b1_%d = 0x%x \n",i,8+i);
}
}
static int
_mcs51_genIVT (FILE * of, symbol ** interrupts, int maxInterrupts)
{
- int i;
+ return FALSE;
+}
- if (options.model != MODEL_FLAT24)
- {
- /* Let the default code handle it. */
- return FALSE;
- }
+/* Generate code to clear XSEG and idata memory.
+ This clears XSEG, DSEG, BSEG, OSEG, SSEG */
+static void _mcs51_genRAMCLEAR (FILE * of) {
+ fprintf (of, "; _mcs51_genRAMCLEAR() start\n");
+ fprintf (of, " mov r0,#l_XSEG\n");
+ fprintf (of, " mov a,r0\n");
+ fprintf (of, " orl a,#(l_XSEG >> 8)\n");
+ fprintf (of, " jz 00005$\n");
+ fprintf (of, " mov r1,#((l_XSEG + 255) >> 8)\n");
+ fprintf (of, " mov dptr,#s_XSEG\n");
+ fprintf (of, " clr a\n");
+ fprintf (of, "00004$: movx @dptr,a\n");
+ fprintf (of, " inc dptr\n");
+ fprintf (of, " djnz r0,00004$\n");
+ fprintf (of, " djnz r1,00004$\n");
+ /* r0 is zero now. Clearing 256 byte assuming 128 byte devices don't mind */
+ fprintf (of, "00005$: mov @r0,a\n");
+ fprintf (of, " djnz r0,00005$\n");
+ fprintf (of, "; _mcs51_genRAMCLEAR() end\n");
+}
- fprintf (of, "\tajmp\t__sdcc_gsinit_startup\n");
+/* Generate code to copy XINIT to XISEG */
+static void _mcs51_genXINIT (FILE * of) {
+ fprintf (of, "; _mcs51_genXINIT() start\n");
+ fprintf (of, " mov r1,#l_XINIT\n");
+ fprintf (of, " mov a,r1\n");
+ fprintf (of, " orl a,#(l_XINIT >> 8)\n");
+ fprintf (of, " jz 00003$\n");
+ fprintf (of, " mov r2,#((l_XINIT+255) >> 8)\n");
+ fprintf (of, " mov dptr,#s_XINIT\n");
+ fprintf (of, " mov r0,#s_XISEG\n");
+ fprintf (of, " mov p2,#(s_XISEG >> 8)\n");
+ fprintf (of, "00001$: 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$\n");
+ fprintf (of, " inc p2\n");
+ fprintf (of, "00002$: djnz r1,00001$\n");
+ fprintf (of, " djnz r2,00001$\n");
+ fprintf (of, " mov p2,#0xFF\n");
+ fprintf (of, "00003$:\n");
+ fprintf (of, "; _mcs51_genXINIT() end\n");
+
+ if (!getenv("SDCC_NOGENRAMCLEAR")) _mcs51_genRAMCLEAR (of);
+}
- /* now for the other interrupts */
- for (i = 0; i < maxInterrupts; i++)
- {
- if (interrupts[i])
- {
- fprintf (of, "\tljmp\t%s\n\t.ds\t4\n", interrupts[i]->rname);
- }
- else
- {
- fprintf (of, "\treti\n\t.ds\t7\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;
+}
+
+/* Indicate which extended bit operations this port supports */
+static bool
+hasExtBitOp (int op, int size)
+{
+ if (op == RRC
+ || op == RLC
+ || op == GETHBIT
+ || (op == SWAP && size <= 2)
+ )
+ return TRUE;
+ else
+ return FALSE;
+}
- return TRUE;
+/* Indicate the expense of an access to an output storage class */
+static int
+oclsExpense (struct memmap *oclass)
+{
+ if (IN_FARSPACE(oclass))
+ return 1;
+
+ return 0;
}
/** $1 is always the basename.
*/
static const char *_linkCmd[] =
{
- "aslink", "-nf", "$1", NULL
+ "aslink", "-nf", "\"$1\"", NULL
};
+/* $3 is replaced by assembler.debug_opts resp. port->assembler.plain_opts */
static const char *_asmCmd[] =
{
- "asx8051", "-plosgffc", "$1.asm", NULL
+ "asx8051", "$l", "$3", "\"$1.asm\"", NULL
};
/* Globals */
PORT mcs51_port =
{
+ TARGET_ID_MCS51,
"mcs51",
"MCU 8051", /* Target name */
+ NULL, /* Processor name */
{
+ glue,
TRUE, /* Emit glue around main */
- MODEL_SMALL | MODEL_LARGE | MODEL_FLAT24,
+ MODEL_SMALL | MODEL_LARGE,
MODEL_SMALL
},
{
_asmCmd,
+ NULL,
"-plosgffc", /* Options with debug */
"-plosgff", /* Options without debug */
- 0
+ 0,
+ ".asm",
+ NULL /* no do_assemble function */
},
{
_linkCmd,
NULL,
+ NULL,
".rel"
},
{
},
{
/* Sizes: char, short, int, long, ptr, fptr, gptr, bit, float, max */
- 1, 1, 2, 4, 1, 2, 3, 1, 4, 4
+ 1, 2, 2, 4, 1, 2, 3, 1, 4, 4
},
{
"XSEG (XDATA)",
"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
},
+ { NULL, NULL },
{
- +1, 1, 4, 1, 1, 0
+ +1, 0, 4, 1, 1, 0
},
/* mcs51 has an 8 bit mul */
{
- 1, 0
+ 1, -1
},
"_",
_mcs51_init,
_mcs51_parseOptions,
+ NULL,
_mcs51_finaliseOptions,
_mcs51_setDefaultOptions,
mcs51_assignRegisters,
_mcs51_getRegName,
_mcs51_keywords,
_mcs51_genAssemblerPreamble,
+ NULL, /* no genAssemblerEnd */
_mcs51_genIVT,
+ _mcs51_genXINIT,
_mcs51_reset_regparm,
_mcs51_regparm,
NULL,
+ NULL,
+ NULL,
+ hasExtBitOp, /* hasExtBitOp */
+ oclsExpense, /* oclsExpense */
FALSE,
+ TRUE, /* little endian */
0, /* leave lt */
0, /* leave gt */
1, /* transform <= to ! > */
1, /* transform >= to ! < */
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
};
projects / fw / sdcc / blobdiff