static char *_mcs51_keywords[] =
{
"at",
+ "banked",
"bit",
"code",
"critical",
"pdata",
"reentrant",
"sfr",
+ "sfr16",
+ "sfr32",
"sbit",
"using",
"xdata",
-void mcs51_assignRegisters (eBBlock ** ebbs, int count);
+void mcs51_assignRegisters (ebbIndex *);
-static int regParmFlg = 0; /* determine if we can register a parameter */
+static int regParmFlg = 0; /* determine if we can register a parameter */
+static int regBitParmFlg = 0; /* determine if we can register a bit parameter */
static void
_mcs51_init (void)
}
static void
-_mcs51_reset_regparm ()
+_mcs51_reset_regparm (void)
{
regParmFlg = 0;
+ regBitParmFlg = 0;
}
static int
-_mcs51_regparm (sym_link * l)
+_mcs51_regparm (sym_link * l, bool reentrant)
{
+ if (IS_SPEC(l) && (SPEC_NOUN(l) == V_BIT)) {
+ /* bit parameters go to b0 thru b7 */
+ if (reentrant && (regBitParmFlg < 8)) {
+ regBitParmFlg++;
+ return 12 + regBitParmFlg;
+ }
+ return 0;
+ }
if (options.parms_in_bank1 == 0) {
- /* simple can pass only the first parameter in a register */
- if (regParmFlg)
- return 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 */
+ 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;
+ if (size > (8 - remain)) {
+ regParmFlg = 12 ;
+ return 0;
+ }
+ regParmFlg += size ;
+ return regParmFlg - size + 1;
}
}
_mcs51_genAssemblerPreamble (FILE * of)
{
if (options.parms_in_bank1) {
- int i ;
- for (i=0; i < 8 ; i++ )
- fprintf (of,"b1_%d = 0x%x \n",i,8+i);
+ 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)
{
- return FALSE;
+ int i;
+
+ fprintf (of, "\tljmp\t__sdcc_gsinit_startup\n");
+
+ /* now for the other interrupts */
+ for (i = 0; i < maxInterrupts; i++)
+ {
+ if (interrupts[i])
+ {
+ fprintf (of, "\tljmp\t%s\n", interrupts[i]->rname);
+ if ( i != maxInterrupts - 1 )
+ fprintf (of, "\t.ds\t5\n");
+ }
+ else
+ {
+ fprintf (of, "\treti\n");
+ if ( i != maxInterrupts - 1 )
+ fprintf (of, "\t.ds\t7\n");
+ }
+ }
+ return TRUE;
+}
+
+static void
+_mcs51_genExtraAreas(FILE *of, bool hasMain)
+{
+ tfprintf (of, "\t!area\n", HOME_NAME);
+ tfprintf (of, "\t!area\n", "GSINIT0 (CODE)");
+ tfprintf (of, "\t!area\n", "GSINIT1 (CODE)");
+ tfprintf (of, "\t!area\n", "GSINIT2 (CODE)");
+ tfprintf (of, "\t!area\n", "GSINIT3 (CODE)");
+ tfprintf (of, "\t!area\n", "GSINIT4 (CODE)");
+ tfprintf (of, "\t!area\n", "GSINIT5 (CODE)");
+ tfprintf (of, "\t!area\n", STATIC_NAME);
+ tfprintf (of, "\t!area\n", port->mem.post_static_name);
+ tfprintf (of, "\t!area\n", CODE_NAME);
}
-/* 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");
+static void
+_mcs51_genInitStartup (FILE *of)
+{
+ tfprintf (of, "\t!global\n", "__sdcc_gsinit_startup");
+ tfprintf (of, "\t!global\n", "__sdcc_program_startup");
+ tfprintf (of, "\t!global\n", "__start__stack");
+
+ if (options.useXstack)
+ {
+ tfprintf (of, "\t!global\n", "__sdcc_init_xstack");
+ tfprintf (of, "\t!global\n", "__start__xstack");
+ }
+
+ // if the port can copy the XINIT segment to XISEG
+ if (port->genXINIT)
+ {
+ port->genXINIT(of);
+ }
+
+ if (!getenv("SDCC_NOGENRAMCLEAR"))
+ tfprintf (of, "\t!global\n", "__mcs51_genRAMCLEAR");
}
+
/* 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);
+ tfprintf (of, "\t!global\n", "__mcs51_genXINIT");
+
+ if (!getenv("SDCC_NOGENRAMCLEAR"))
+ tfprintf (of, "\t!global\n", "__mcs51_genXRAMCLEAR");
}
/* 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
+
+ /* 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;
+ /* 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;
}
{
if (IN_FARSPACE(oclass))
return 1;
-
+
return 0;
}
/* Based on the current (2003-08-22) code generation for the
small library, the top instruction probability is:
-
+
57% mov/movx/movc
6% push
6% pop
if (*(inst+3)=='c') return 1; /* movc */
if (IS_C (op1) || IS_C (op2)) return 2;
if (IS_A (op1))
- {
- if (IS_Rn (op2) || IS_atRi (op2)) return 1;
- return 2;
- }
+ {
+ if (IS_Rn (op2) || IS_atRi (op2)) return 1;
+ return 2;
+ }
if (IS_Rn(op1) || IS_atRi(op1))
- {
- if (IS_A(op2)) return 1;
- return 2;
- }
+ {
+ if (IS_A(op2)) return 1;
+ return 2;
+ }
if (strcmp (op1, "dptr") == 0) return 3;
if (IS_A (op2) || IS_Rn (op2) || IS_atRi (op2)) return 2;
return 3;
}
-
+
if (ISINST ("push")) return 2;
if (ISINST ("pop")) return 2;
if (ISINST ("jb")) return 3;
if (ISINST ("jnb")) return 3;
if (ISINST ("jbc")) return 3;
- if (ISINST ("jmp")) return 1; // always jmp @a+dptr
+ if (ISINST ("jmp")) return 1; // always jmp @a+dptr
if (ISINST ("jz")) return 2;
if (ISINST ("jnz")) return 2;
if (ISINST ("cjne")) return 3;
if (ISINST ("xchd")) return 1;
if (ISINST ("reti")) return 1;
if (ISINST ("nop")) return 1;
- if (ISINST ("acall")) return 1;
+ if (ISINST ("acall")) return 2;
if (ISINST ("ajmp")) return 2;
-
+
if (ISINST ("add") || ISINST ("addc") || ISINST ("subb") || ISINST ("xch"))
{
if (IS_Rn(op2) || IS_atRi(op2)) return 1;
{
if (IS_C(op1)) return 2;
if (IS_A(op1))
- {
- if (IS_Rn(op2) || IS_atRi(op2)) return 1;
- return 2;
- }
+ {
+ if (IS_Rn(op2) || IS_atRi(op2)) return 1;
+ return 2;
+ }
else
- {
- if (IS_A(op2)) return 2;
- return 3;
- }
+ {
+ if (IS_A(op2)) return 2;
+ return 3;
+ }
}
if (ISINST ("clr") || ISINST ("setb") || ISINST ("cpl"))
{
aln->size = 0;
aln->regsRead = NULL;
aln->regsWritten = NULL;
-
+
return aln;
}
return strcmp((const char *)key, ((mcs51operanddata *)member)->name);
}
-static void
+static void
updateOpRW (asmLineNode *aln, char *op, char *optype)
{
mcs51operanddata *opdat;
char *dot;
-
+
dot = strchr(op, '.');
if (dot)
*dot = '\0';
opdat = bsearch (op, mcs51operandDataTable,
- sizeof(mcs51operandDataTable)/sizeof(mcs51operanddata),
- sizeof(mcs51operanddata), mcs51operandCompare);
-
+ sizeof(mcs51operandDataTable)/sizeof(mcs51operanddata),
+ sizeof(mcs51operanddata), mcs51operandCompare);
+
if (opdat && strchr(optype,'r'))
{
if (opdat->regIdx1 >= 0)
aln->regsRead = bitVectSetBit (aln->regsRead, R0_IDX);
if (!strcmp(op, "@r1"))
aln->regsRead = bitVectSetBit (aln->regsRead, R1_IDX);
- if (!strstr(op, "dptr"))
- {
- aln->regsRead = bitVectSetBit (aln->regsRead, DPL_IDX);
- aln->regsRead = bitVectSetBit (aln->regsRead, DPH_IDX);
- }
- if (!strstr(op, "a+"))
- aln->regsRead = bitVectSetBit (aln->regsRead, A_IDX);
+ if (strstr(op, "dptr"))
+ {
+ aln->regsRead = bitVectSetBit (aln->regsRead, DPL_IDX);
+ aln->regsRead = bitVectSetBit (aln->regsRead, DPH_IDX);
+ }
+ if (strstr(op, "a+"))
+ aln->regsRead = bitVectSetBit (aln->regsRead, A_IDX);
}
}
static mcs51opcodedata mcs51opcodeDataTable[] =
{
{"acall","j", "", "", ""},
- {"ajmp", "j", "", "", ""},
{"add", "", "w", "rw", "r"},
{"addc", "", "rw", "rw", "r"},
+ {"ajmp", "j", "", "", ""},
{"anl", "", "", "rw", "r"},
{"cjne", "j", "w", "r", "r"},
{"clr", "", "", "w", ""},
{"xchd", "", "", "rw", "rw"},
{"xrl", "", "", "rw", "r"},
};
-
+
static int
mcs51opcodeCompare (const void *key, const void *member)
{
asmLineNode *aln = newAsmLineNode();
char *op, op1[256], op2[256];
int opsize;
- const char *p;
+ const unsigned char *p;
char inst[8];
mcs51opcodedata *opdat;
p = ln->line;
-
+
while (*p && isspace(*p)) p++;
for (op = inst, opsize=1; *p; p++)
{
break;
else
if (opsize < sizeof(inst))
- *op++ = tolower(*p), opsize++;
+ *op++ = tolower(*p), opsize++;
}
*op = '\0';
if (*p == ';' || *p == ':' || *p == '=')
return aln;
-
+
while (*p && isspace(*p)) p++;
if (*p == '=')
return aln;
*op++ = tolower(*p), opsize++;
}
*op = '\0';
-
+
if (*p == ',') p++;
for (op = op2, opsize=1; *p && *p != ','; p++)
{
aln->regsWritten = newBitVect (END_IDX);
opdat = bsearch (inst, mcs51opcodeDataTable,
- sizeof(mcs51opcodeDataTable)/sizeof(mcs51opcodedata),
- sizeof(mcs51opcodedata), mcs51opcodeCompare);
+ sizeof(mcs51opcodeDataTable)/sizeof(mcs51opcodedata),
+ sizeof(mcs51opcodedata), mcs51opcodeCompare);
if (opdat)
{
{
if (!line->aln)
line->aln = asmLineNodeFromLineNode (line);
-
+
return line->aln->size;
}
{
if (!line->aln)
line->aln = asmLineNodeFromLineNode (line);
-
+
return line->aln->regsRead;
}
{
if (!line->aln)
line->aln = asmLineNodeFromLineNode (line);
-
+
return line->aln->regsWritten;
}
{
TARGET_ID_MCS51,
"mcs51",
- "MCU 8051", /* Target name */
- NULL, /* Processor name */
+ "MCU 8051", /* Target name */
+ NULL, /* Processor name */
{
glue,
- TRUE, /* Emit glue around main */
+ TRUE, /* Emit glue around main */
MODEL_SMALL | MODEL_LARGE,
MODEL_SMALL
},
{
_asmCmd,
NULL,
- "-plosgffc", /* Options with debug */
- "-plosgff", /* Options without debug */
+ "-plosgffc", /* Options with debug */
+ "-plosgff", /* Options without debug */
0,
".asm",
- NULL /* no do_assemble function */
+ NULL /* no do_assemble function */
},
{
_linkCmd,
getRegsWritten
},
{
- /* Sizes: char, short, int, long, ptr, fptr, gptr, bit, float, max */
+ /* Sizes: char, short, int, long, ptr, fptr, gptr, bit, float, max */
1, 2, 2, 4, 1, 2, 3, 1, 4, 4
},
{
- "XSEG (XDATA)",
- "STACK (DATA)",
- "CSEG (CODE)",
- "DSEG (DATA)",
- "ISEG (DATA)",
- "XSEG (XDATA)",
- "BSEG (BIT)",
- "RSEG (DATA)",
- "GSINIT (CODE)",
- "OSEG (OVR,DATA)",
- "GSFINAL (CODE)",
- "HOME (CODE)",
- "XISEG (XDATA)", // initialized xdata
- "XINIT (CODE)", // a code copy of xiseg
+ "XSTK (PAG,XDATA)", // xstack_name
+ "STACK (DATA)", // istack_name
+ "CSEG (CODE)", // code_name
+ "DSEG (DATA)", // data_name
+ "ISEG (DATA)", // idata_name
+ "PSEG (PAG,XDATA)", // pdata_name
+ "XSEG (XDATA)", // xdata_name
+ "BSEG (BIT)", // bit_name
+ "RSEG (DATA)", // reg_name
+ "GSINIT (CODE)", // static_name
+ "OSEG (OVR,DATA)", // overlay_name
+ "GSFINAL (CODE)", // post_static_name
+ "HOME (CODE)", // home_name
+ "XISEG (XDATA)", // xidata_name - initialized xdata initialized xdata
+ "XINIT (CODE)", // xinit_name - a code copy of xiseg
+ "CONST (CODE)", // const_name - const data (code or not)
NULL,
NULL,
1
},
- { NULL, NULL },
+ { _mcs51_genExtraAreas, NULL },
{
- +1, 0, 4, 1, 1, 0
+ +1, /* direction (+1 = stack grows up) */
+ 0, /* bank_overhead (switch between register banks) */
+ 4, /* isr_overhead */
+ 1, /* call_overhead (2 for return address - 1 for pre-incrementing push */
+ 1, /* reent_overhead */
+ 0 /* banked_overhead (switch between code banks) */
},
- /* mcs51 has an 8 bit mul */
{
+ /* mcs51 has an 8 bit mul */
1, -1
},
+ {
+ mcs51_emitDebuggerSymbol
+ },
+ {
+ 256, /* maxCount */
+ 2, /* sizeofElement */
+ {6,9,15}, /* sizeofMatchJump[] */
+ {9,18,36}, /* sizeofRangeCompare[] */
+ 4, /* sizeofSubtract */
+ 6, /* sizeofDispatch */
+ },
"_",
_mcs51_init,
_mcs51_parseOptions,
NULL,
+ NULL,
_mcs51_finaliseOptions,
_mcs51_setDefaultOptions,
mcs51_assignRegisters,
_mcs51_getRegName,
_mcs51_keywords,
_mcs51_genAssemblerPreamble,
- NULL, /* no genAssemblerEnd */
+ NULL, /* no genAssemblerEnd */
_mcs51_genIVT,
_mcs51_genXINIT,
+ _mcs51_genInitStartup,
_mcs51_reset_regparm,
_mcs51_regparm,
NULL,
NULL,
NULL,
- hasExtBitOp, /* hasExtBitOp */
- oclsExpense, /* oclsExpense */
+ 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 == */
+ 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 */
+ 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