sdcc-3.9.0 fork implementing GNU assembler syntax

This fork aims to provide better support for stm8-binutils

1 files changed, 249 insertions, 0 deletions

diff --git a/sdas/as8xcxxx/ds8adr.c b/sdas/as8xcxxx/ds8adr.c
new file mode 100644
index 0000000..3575707
--- /dev/null
+++ b/sdas/as8xcxxx/ds8adr.c
@@ -0,0 +1,249 @@
+/* ds8adr.c */
+
+/*
+ *  Copyright (C) 1998-2009  Alan R. Baldwin
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ *
+ * Alan R. Baldwin
+ * 721 Berkeley St.
+ * Kent, Ohio  44240
+ *
+ *   This Assember Ported by
+ *      jhartman at compuserve dot com
+ *      noice at noicedebugger dot com
+ *
+ *   Modified from i51pst.c
+ *      Bill McKinnon
+ *      w_mckinnon at conknet dot com
+ *
+ */
+
+#include "asxxxx.h"
+#include "ds8.h"
+
+
+struct adsym reg51[] = {        /* R0 thru R7 registers */
+    {   "R0",   R0      },
+    {   "R1",   R1      },
+    {   "R2",   R2      },
+    {   "R3",   R3      },
+    {   "R4",   R4      },
+    {   "R5",   R5      },
+    {   "R6",   R6      },
+    {   "R7",   R7      },
+    {   "A",    A       },
+    {   "DPTR", DPTR    },
+    {   "PC",   PC      },
+    {   "C",    C       },
+    {   "AB",   AB      },
+    {   "",     0x00    }
+};
+
+/*  Classify argument as to address mode */
+int
+addr(struct expr *esp)
+{
+        int c;
+        unsigned int rd;
+
+        if ((c = getnb()) == '#') {
+                /*  Immediate mode */
+                expr(esp, 0);
+                esp->e_mode = S_IMMED;
+        }
+        else if (c == '@') {
+                /* choices are @R0, @R1, @DPTR, @A+PC, @A+DPTR */
+                switch (reg()) {
+                case R0:
+                        esp->e_mode = S_AT_R;
+                        esp->e_addr = R0;
+                        break;
+                case R1:
+                        esp->e_mode = S_AT_R;
+                        esp->e_addr = R1;
+                        break;
+                case DPTR:
+                        esp->e_mode = S_AT_DP;
+                        esp->e_addr = DPTR;
+                        break;
+                case A:
+                        if (getnb() == '+') {
+                                rd = reg();
+                                if (rd == PC) {
+                                        esp->e_mode = S_AT_APC;
+                                        esp->e_addr = 0;
+                                } else if (rd == DPTR) {
+                                        esp->e_mode = S_AT_ADP;
+                                        esp->e_addr = 0;
+                                } else {
+                                        aerr();
+                                }
+                        } else
+                                aerr();
+                        break;
+                }
+
+                esp->e_flag = 0;
+                esp->e_base.e_ap = NULL;
+        }
+        else if (c == '*') {
+                if ((c = getnb()) == '/') {
+                        /* Force inverted bit */
+                        expr(esp, 0);
+                        esp->e_mode = S_NOT_BIT;
+                } else {
+                        unget(c);
+                        /* Force direct page */
+                        expr(esp, 0);
+                        esp->e_mode = S_DIR;
+                }
+                if (esp->e_addr & ~0xFF)
+                        err('d');
+        }
+        else if (c == '/') {
+                /* Force inverted bit  */
+                expr(esp, 0);
+                esp->e_mode = S_NOT_BIT;
+        }
+        else {
+                unget(c);
+
+                /* try for register: A, AB, R0-R7, DPTR, PC, Cy */
+                if ((esp->e_addr = admode(reg51)) != -1) {
+                        switch (esp->e_addr) {
+                        case A:
+                                esp->e_mode = S_A;
+                                break;
+                        case AB:
+                                esp->e_mode = S_RAB;
+                                break;
+                        case DPTR:
+                                esp->e_mode = S_DPTR;
+                                break;
+                        case PC:
+                                esp->e_mode = S_PC;
+                                break;
+                        case C:
+                                esp->e_mode = S_C;
+                                break;
+                        default:
+                                /* R0-R7 */
+                                esp->e_mode = S_REG;
+                        }
+                } else {
+                        /* Must be an expression */
+                        esp->e_addr = 0;                /* Vasiliy Petrov */
+                        expr(esp, 0);
+                        if ((!esp->e_flag)
+                                && (esp->e_base.e_ap==NULL)
+                                && !(esp->e_addr & ~0xFF)) {
+                                esp->e_mode = S_DIR;
+                        } else {
+                                esp->e_mode = S_EXT;
+                        }
+                }
+        }
+        return (esp->e_mode);
+}
+
+/*
+ * Enter admode() to search a specific addressing mode table
+ * for a match. Return the addressing value on a match or
+ * -1 for no match.
+ */
+int
+admode(struct adsym *sp)
+{
+        char *ptr;
+        int i;
+
+        unget(getnb());
+        i = 0;
+        while ( *(ptr = &sp[i].a_str[0]) ) {
+                if (srch(ptr)) {
+                        return(sp[i].a_val);
+                }
+                i++;
+        }
+        return(-1);
+}
+
+/*
+ *      srch --- does string match ?
+ */
+int
+srch(char *str)
+{
+        char *ptr;
+        ptr = ip;
+
+        while (*ptr && *str) {
+                if(ccase[*ptr & 0x007F] != ccase[*str & 0x007F])
+                        break;
+                ptr++;
+                str++;
+        }
+        if (ccase[*ptr & 0x007F] == ccase[*str & 0x007F]) {
+                ip = ptr;
+                return(1);
+        }
+
+        if (!*str)
+                if (any(*ptr," \t\n,];")) {
+                        ip = ptr;
+                        return(1);
+                }
+        return(0);
+}
+
+/*
+ *      any --- does str contain c?
+ */
+int
+any(int c, char *str)
+{
+        while (*str)
+                if(*str++ == c)
+                        return(1);
+        return(0);
+}
+
+/*
+ * Read a register name.  Return register value, -1 if no register found
+ */
+int
+reg(void)
+{
+        struct mne *mp;
+        char id[NCPS];
+
+        getid(id, -1);
+        if ((mp = mlookup(id))==NULL) {
+                aerr();
+                return (-1);
+        }
+        switch (mp->m_type) {
+        case S_A:
+        case S_AB:
+        case S_DPTR:
+        case S_PC:
+        case S_REG:
+                return ((int) mp->m_valu);
+
+        default:
+                return (-1);
+        }
+}