1 /* tc-msp430.c -- Assembler code for the Texas Instruments MSP430
3 Copyright (C) 2002, 2003 Free Software Foundation, Inc.
4 Contributed by Dmitry Diky <diwil@mail.ru>
6 This file is part of GAS, the GNU Assembler.
8 GAS is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GAS is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GAS; see the file COPYING. If not, write to
20 the Free Software Foundation, 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
28 #define PUSH_1X_WORKAROUND
31 #include "opcode/msp430.h"
32 #include "safe-ctype.h"
34 const char comment_chars[] = ";";
35 const char line_comment_chars[] = "#";
36 const char line_separator_chars[] = "";
37 const char EXP_CHARS[] = "eE";
38 const char FLT_CHARS[] = "dD";
40 /* Handle long expressions. */
41 extern LITTLENUM_TYPE generic_bignum[];
43 static struct hash_control *msp430_hash;
45 static unsigned int msp430_operands
46 PARAMS ((struct msp430_opcode_s *, char *));
47 static int msp430_srcoperand
48 PARAMS ((struct msp430_operand_s *, char *, int, int *));
49 static int msp430_dstoperand
50 PARAMS ((struct msp430_operand_s *, char *, int));
51 static char *parse_exp
52 PARAMS ((char *, expressionS *));
53 static inline char *skip_space
57 static void msp430_set_arch
59 static void show_mcu_list
61 static void del_spaces
73 #define MSP430_ISA_11 11
74 #define MSP430_ISA_12 12
75 #define MSP430_ISA_13 13
76 #define MSP430_ISA_14 14
77 #define MSP430_ISA_41 41
78 #define MSP430_ISA_31 31
79 #define MSP430_ISA_32 32
80 #define MSP430_ISA_33 33
81 #define MSP430_ISA_110 110
82 #define MSP430_ISA_43 43
83 #define MSP430_ISA_44 44
84 #define MSP430_ISA_15 15
85 #define MSP430_ISA_16 16
87 #define CHECK_RELOC_MSP430 ((imm_op || byte_op)?BFD_RELOC_MSP430_16_BYTE:BFD_RELOC_MSP430_16)
88 #define CHECK_RELOC_MSP430_PCREL ((imm_op || byte_op)?BFD_RELOC_MSP430_16_PCREL_BYTE:BFD_RELOC_MSP430_16_PCREL)
90 static struct mcu_type_s mcu_types[] =
92 {"msp1", MSP430_ISA_11, bfd_mach_msp11},
93 {"msp2", MSP430_ISA_14, bfd_mach_msp14},
94 {"msp430x110", MSP430_ISA_11, bfd_mach_msp11},
95 {"msp430x112", MSP430_ISA_11, bfd_mach_msp11},
96 {"msp430x122", MSP430_ISA_12, bfd_mach_msp12},
97 {"msp430x122", MSP430_ISA_12, bfd_mach_msp12},
98 {"msp430x1222",MSP430_ISA_12, bfd_mach_msp12},
99 {"msp430x123", MSP430_ISA_12, bfd_mach_msp12},
100 {"msp430x1232",MSP430_ISA_12, bfd_mach_msp12},
101 {"msp430x133", MSP430_ISA_13, bfd_mach_msp13},
102 {"msp430x135", MSP430_ISA_13, bfd_mach_msp13},
103 {"msp430x147", MSP430_ISA_14, bfd_mach_msp14},
104 {"msp430x148", MSP430_ISA_14, bfd_mach_msp14},
105 {"msp430x149", MSP430_ISA_14, bfd_mach_msp14},
106 {"msp430x412", MSP430_ISA_41, bfd_mach_msp41},
107 {"msp430x413", MSP430_ISA_41, bfd_mach_msp41},
108 {"msp430x311", MSP430_ISA_31, bfd_mach_msp31},
109 {"msp430x312", MSP430_ISA_31, bfd_mach_msp31},
110 {"msp430x313", MSP430_ISA_31, bfd_mach_msp31},
111 {"msp430x314", MSP430_ISA_31, bfd_mach_msp31},
112 {"msp430x315", MSP430_ISA_31, bfd_mach_msp31},
113 {"msp430x323", MSP430_ISA_32, bfd_mach_msp32},
114 {"msp430x325", MSP430_ISA_32, bfd_mach_msp32},
115 {"msp430x336", MSP430_ISA_33, bfd_mach_msp33},
116 {"msp430x337", MSP430_ISA_33, bfd_mach_msp33},
117 {"msp430x1101",MSP430_ISA_110, bfd_mach_msp110},
118 {"msp430x1111",MSP430_ISA_110, bfd_mach_msp110},
119 {"msp430x1121",MSP430_ISA_110, bfd_mach_msp110},
120 {"msp430x1331",MSP430_ISA_13, bfd_mach_msp13},
121 {"msp430x1351",MSP430_ISA_13, bfd_mach_msp13},
122 {"msp430x435", MSP430_ISA_43, bfd_mach_msp43},
123 {"msp430x436", MSP430_ISA_43, bfd_mach_msp43},
124 {"msp430x447", MSP430_ISA_44, bfd_mach_msp44},
125 {"msp430x448", MSP430_ISA_44, bfd_mach_msp44},
126 {"msp430x449", MSP430_ISA_44, bfd_mach_msp44},
127 {"msp430x167", MSP430_ISA_16, bfd_mach_msp16},
128 {"msp430x168", MSP430_ISA_16, bfd_mach_msp16},
129 {"msp430x169", MSP430_ISA_16, bfd_mach_msp16},
130 {"msp430x155", MSP430_ISA_15, bfd_mach_msp15},
131 {"msp430x156", MSP430_ISA_15, bfd_mach_msp15},
132 {"msp430x157", MSP430_ISA_15, bfd_mach_msp15},
138 static struct mcu_type_s default_mcu =
139 { "msp430x11", MSP430_ISA_11, bfd_mach_msp11 };
141 static struct mcu_type_s *msp430_mcu = &default_mcu;
143 const pseudo_typeS md_pseudo_table[] =
145 {"arch", msp430_set_arch, 0},
149 #define OPTION_MMCU 'm'
151 const char *md_shortopts = "m:";
153 struct option md_longopts[] =
155 {"mmcu", required_argument, NULL, OPTION_MMCU},
156 {NULL, no_argument, NULL, 0}
159 size_t md_longopts_size = sizeof (md_longopts);
162 show_mcu_list (stream)
167 fprintf (stream, _("Known MCU names:\n"));
169 for (i = 0; mcu_types[i].name; i++)
170 fprintf (stream, _("\t %s\n"), mcu_types[i].name);
172 fprintf (stream, "\n");
176 md_show_usage (stream)
180 _("MSP430 options:\n"
181 " -mmcu=[msp430-name] select microcontroller type\n"
182 " msp430x1101 msp430x1111 msp430x1121\n"
183 " msp430x1331 msp430x1351\n"
184 " msp430x1222 msp430x1232\n"
185 " msp430x311 msp430x312 msp430x313 msp430x314 msp430x315\n"
186 " msp430x323 msp430x325\n"
187 " msp430x336 msp430x337\n"
188 " msp430x412 msp430x413\n"
189 " msp430x110 msp430x112\n"
190 " msp430x122 msp430x123\n"
191 " msp430x133 msp430x135\n"
192 " msp430x147 msp430x148 msp430x149\n"
193 " msp430x167 msp430x168 msp430x169\n"
194 " msp430x155 msp430x156 msp430x157\n"
195 " msp430x447 msp430x448 msp430x449\n"
196 " msp430x435 msp430x436\n"));
198 show_mcu_list (stream);
202 extract_word (char *from, char *to, int limit)
208 /* Drop leading whitespace. */
209 from = skip_space (from);
212 /* Find the op code end. */
213 for (op_start = op_end = from; *op_end != 0 && is_part_of_name (*op_end);)
215 to[size++] = *op_end++;
216 if (size + 1 >= limit)
225 msp430_set_arch (dummy)
226 int dummy ATTRIBUTE_UNUSED;
228 char *str = (char *) alloca (32); /* 32 for good measure. */
230 input_line_pointer = extract_word (input_line_pointer, str, 32);
232 md_parse_option (OPTION_MMCU, str);
233 bfd_set_arch_mach (stdoutput, TARGET_ARCH, msp430_mcu->mach);
237 md_parse_option (c, arg)
246 for (i = 0; mcu_types[i].name; ++i)
247 if (strcmp (mcu_types[i].name, arg) == 0)
250 if (!mcu_types[i].name)
252 show_mcu_list (stderr);
253 as_fatal (_("unknown MCU: %s\n"), arg);
256 if (msp430_mcu == &default_mcu || msp430_mcu->mach == mcu_types[i].mach)
257 msp430_mcu = &mcu_types[i];
259 as_fatal (_("redefinition of mcu type %s' to %s'"),
260 msp430_mcu->name, mcu_types[i].name);
268 md_undefined_symbol (name)
269 char *name ATTRIBUTE_UNUSED;
283 /* Delete spaces from s: X ( r 1 2) => X(r12). */
295 while (ISSPACE (*m) && *m)
297 memmove (s, m, strlen (m) + 1);
304 /* Extract one word from FROM and copy it to TO. Delimeters are ",;\n" */
307 extract_operand (char *from, char *to, int limit)
311 /* Drop leading whitespace. */
312 from = skip_space (from);
314 while (size < limit && *from)
316 *(to + size) = *from;
317 if (*from == ',' || *from == ';' || *from == '\n')
332 extract_cmd (char *from, char *to, int limit)
336 while (*from && ! ISSPACE (*from) && *from != '.' && limit > size)
338 *(to + size) = *from;
348 /* Turn a string in input_line_pointer into a floating point constant
349 of type TYPE, and store the appropriate bytes in *LITP. The number
350 of LITTLENUMS emitted is stored in *SIZEP. An error message is
351 returned, or NULL on OK. */
354 md_atof (type, litP, sizeP)
360 LITTLENUM_TYPE words[4];
361 LITTLENUM_TYPE *wordP;
374 return _("bad call to md_atof");
377 t = atof_ieee (input_line_pointer, type, words);
379 input_line_pointer = t;
381 *sizeP = prec * sizeof (LITTLENUM_TYPE);
383 /* This loop outputs the LITTLENUMs in REVERSE order. */
384 for (wordP = words + prec - 1; prec--;)
386 md_number_to_chars (litP, (valueT) (*wordP--), sizeof (LITTLENUM_TYPE));
387 litP += sizeof (LITTLENUM_TYPE);
394 md_convert_frag (abfd, sec, fragP)
395 bfd *abfd ATTRIBUTE_UNUSED;
396 asection *sec ATTRIBUTE_UNUSED;
397 fragS *fragP ATTRIBUTE_UNUSED;
405 struct msp430_opcode_s *opcode;
406 msp430_hash = hash_new ();
408 for (opcode = msp430_opcodes; opcode->name; opcode++)
409 hash_insert (msp430_hash, opcode->name, (char *) opcode);
411 bfd_set_arch_mach (stdoutput, TARGET_ARCH, msp430_mcu->mach);
418 struct msp430_opcode_s *opcode;
422 str = skip_space (str); /* Skip leading spaces. */
423 str = extract_cmd (str, cmd, sizeof (cmd));
425 while (cmd[i] && i < sizeof (cmd))
427 char a = TOLOWER (cmd[i]);
434 as_bad (_("can't find opcode "));
438 opcode = (struct msp430_opcode_s *) hash_find (msp430_hash, cmd);
442 as_bad (_("unknown opcode `%s'"), cmd);
447 char *__t = input_line_pointer;
448 msp430_operands (opcode, str);
449 input_line_pointer = __t;
453 /* Parse instruction operands.
454 Return binary opcode. */
457 msp430_operands (opcode, line)
458 struct msp430_opcode_s *opcode;
461 int bin = opcode->bin_opcode; /* opcode mask. */
463 char l1[MAX_OP_LEN], l2[MAX_OP_LEN];
466 struct msp430_operand_s op1, op2;
468 static short ZEROS = 0;
471 /* opcode is the one from opcodes table
472 line contains something like
477 /* Check if byte or word operation. */
478 if (*line == '.' && TOLOWER (*(line + 1)) == 'b')
480 bin |= BYTE_OPERATION;
487 while (! ISSPACE (*line) && *line)
490 if (opcode->insn_opnumb && (!*line || *line == '\n'))
492 as_bad (_("instruction %s requires %d operand(s)"),
493 opcode->name, opcode->insn_opnumb);
497 memset (l1, 0, sizeof (l1));
498 memset (l2, 0, sizeof (l2));
499 memset (&op1, 0, sizeof (op1));
500 memset (&op2, 0, sizeof (op2));
506 case 0: /* Emulated. */
507 switch (opcode->insn_opnumb)
510 /* Set/clear bits instructions. */
512 frag = frag_more (__is);
513 bfd_putl16 ((bfd_vma) bin, frag);
516 /* Something which works with destination operand. */
517 line = extract_operand (line, l1, sizeof (l1));
518 res = msp430_dstoperand (&op1, l1, opcode->bin_opcode);
522 bin |= (op1.reg | (op1.am << 7));
524 frag = frag_more (2 * __is);
525 where = frag - frag_now->fr_literal;
526 bfd_putl16 ((bfd_vma) bin, frag);
528 if (op1.mode == OP_EXP)
531 bfd_putl16 ((bfd_vma) ZEROS, frag + 2);
534 fix_new_exp (frag_now, where, 2,
535 &(op1.exp), FALSE, CHECK_RELOC_MSP430);
537 fix_new_exp (frag_now, where, 2,
538 &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL);
546 /* Shift instruction. */
547 line = extract_operand (line, l1, sizeof (l1));
548 strncpy (l2, l1, 16);
549 res = msp430_srcoperand (&op1, l1, opcode->bin_opcode, &imm_op);
550 res += msp430_dstoperand (&op2, l2, opcode->bin_opcode);
553 break; /* An error occured. All warnings were done before. */
555 bin |= (op2.reg | (op1.reg << 8) | (op1.am << 4) | (op2.am << 7));
557 __is = 1 + op1.ol + op2.ol; /* insn size in words. */
558 frag = frag_more (2 * __is);
559 where = frag - frag_now->fr_literal;
560 bfd_putl16 ((bfd_vma) bin, frag);
562 if (op1.mode == OP_EXP)
564 where += 2; /* Advance 'where' as we do not know _where_. */
565 bfd_putl16 ((bfd_vma) ZEROS, frag + 2);
567 if (op1.reg || (op1.reg == 0 && op1.am == 3)) /* Not PC relative. */
568 fix_new_exp (frag_now, where, 2,
569 &(op1.exp), FALSE, CHECK_RELOC_MSP430);
571 fix_new_exp (frag_now, where, 2,
572 &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL);
575 if (op2.mode == OP_EXP)
578 bfd_putl16 ((bfd_vma) ZEROS, frag + 2 + ((__is == 3) ? 2 : 0));
580 if (op2.reg) /* Not PC relative. */
581 fix_new_exp (frag_now, where + 2, 2,
582 &(op2.exp), FALSE, CHECK_RELOC_MSP430);
584 fix_new_exp (frag_now, where + 2, 2,
585 &(op2.exp), TRUE, CHECK_RELOC_MSP430_PCREL);
590 /* Branch instruction => mov dst, r0. */
591 line = extract_operand (line, l1, sizeof (l1));
593 res = msp430_srcoperand (&op1, l1, opcode->bin_opcode, &imm_op);
600 bin |= ((op1.reg << 8) | (op1.am << 4));
602 frag = frag_more (2 * __is);
603 where = frag - frag_now->fr_literal;
604 bfd_putl16 ((bfd_vma) bin, frag);
606 if (op1.mode == OP_EXP)
609 bfd_putl16 ((bfd_vma) ZEROS, frag + 2);
611 if (op1.reg || (op1.reg == 0 && op1.am == 3))
612 fix_new_exp (frag_now, where, 2,
613 &(op1.exp), FALSE, CHECK_RELOC_MSP430);
615 fix_new_exp (frag_now, where, 2,
616 &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL);
622 case 1: /* Format 1, double operand. */
623 line = extract_operand (line, l1, sizeof (l1));
624 line = extract_operand (line, l2, sizeof (l2));
625 res = msp430_srcoperand (&op1, l1, opcode->bin_opcode, &imm_op);
626 res += msp430_dstoperand (&op2, l2, opcode->bin_opcode);
629 break; /* Error occured. All warnings were done before. */
631 bin |= (op2.reg | (op1.reg << 8) | (op1.am << 4) | (op2.am << 7));
633 __is = 1 + op1.ol + op2.ol; /* insn size in words. */
634 frag = frag_more (2 * __is);
635 where = frag - frag_now->fr_literal;
636 bfd_putl16 ((bfd_vma) bin, frag);
638 if (op1.mode == OP_EXP)
640 where += 2; /* Advance where as we do not know _where_. */
641 bfd_putl16 ((bfd_vma) ZEROS, frag + 2);
643 if (op1.reg || (op1.reg == 0 && op1.am == 3)) /* Not PC relative. */
644 fix_new_exp (frag_now, where, 2,
645 &(op1.exp), FALSE, CHECK_RELOC_MSP430);
647 fix_new_exp (frag_now, where, 2,
648 &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL);
651 if (op2.mode == OP_EXP)
654 bfd_putl16 ((bfd_vma) ZEROS, frag + 2 + ((__is == 3) ? 2 : 0));
656 if (op2.reg) /* Not PC relative. */
657 fix_new_exp (frag_now, where + 2, 2,
658 &(op2.exp), FALSE, CHECK_RELOC_MSP430);
660 fix_new_exp (frag_now, where + 2, 2,
661 &(op2.exp), TRUE, CHECK_RELOC_MSP430_PCREL);
665 case 2: /* Single-operand mostly instr. */
666 if (opcode->insn_opnumb == 0)
668 /* reti instruction. */
669 frag = frag_more (2);
670 bfd_putl16 ((bfd_vma) bin, frag);
674 line = extract_operand (line, l1, sizeof (l1));
675 res = msp430_srcoperand (&op1, l1, opcode->bin_opcode, &imm_op);
677 break; /* Error in operand. */
679 bin |= op1.reg | (op1.am << 4);
681 frag = frag_more (2 * __is);
682 where = frag - frag_now->fr_literal;
683 bfd_putl16 ((bfd_vma) bin, frag);
685 if (op1.mode == OP_EXP)
687 bfd_putl16 ((bfd_vma) ZEROS, frag + 2);
689 if (op1.reg || (op1.reg == 0 && op1.am == 3)) /* Not PC relative. */
690 fix_new_exp (frag_now, where + 2, 2,
691 &(op1.exp), FALSE, CHECK_RELOC_MSP430);
693 fix_new_exp (frag_now, where + 2, 2,
694 &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL);
698 case 3: /* Conditional jumps instructions. */
699 line = extract_operand (line, l1, sizeof (l1));
710 frag = frag_more (2); /* Instr size is 1 word. */
712 /* In order to handle something like:
716 jz 4 ; skip next 4 bytes
719 nop ; will jump here if r5 positive or zero
721 jCOND -n ;assumes jump n bytes backward:
731 jCOND $n ; jump from PC in either direction. */
733 if (exp.X_op == O_constant)
735 int x = exp.X_add_number;
739 as_warn (_("Even number required. Rounded to %d"), x + 1);
743 if ((*l1 == '$' && x > 0) || x < 0)
748 if (x > 512 || x < -511)
750 as_bad (_("Wrong displacement %d"), x << 1);
755 bfd_putl16 ((bfd_vma) bin, frag);
757 else if (exp.X_op == O_symbol && *l1 != '$')
759 where = frag - frag_now->fr_literal;
760 fix_new_exp (frag_now, where, 2,
761 &exp, TRUE, BFD_RELOC_MSP430_10_PCREL);
763 bfd_putl16 ((bfd_vma) bin, frag);
767 as_bad (_("instruction requires label sans '$'"));
773 ("instruction requires label or value in range -511:512"));
779 as_bad (_("instruction requires label"));
785 as_bad (_("Ilegal instruction or not implmented opcode."));
788 input_line_pointer = line;
793 msp430_dstoperand (op, l, bin)
794 struct msp430_operand_s *op;
799 int ret = msp430_srcoperand (op, l, bin, &dummy);
810 parse_exp (__tl, &(op->exp));
811 if (op->exp.X_op != O_constant || op->exp.X_add_number != 0)
813 as_bad (_("Internal bug. Try to use 0(r%d) instead of @r%d"),
823 ("this addressing mode is not applicable for destination operand"));
834 /* If this is a reg numb, str 't' must be a number from 0 - 15. */
836 if (strlen (t) > 2 && *(t + 2) != '+')
841 if ((*t < '0' || *t > '9') && *t != '+')
854 msp430_srcoperand (op, l, bin, imm_op)
855 struct msp430_operand_s *op;
862 /* Check if an immediate #VALUE. The hash sign should be only at the beginning! */
869 /* Check if there is:
870 llo(x) - least significant 16 bits, x &= 0xffff
871 lhi(x) - x = (x >> 16) & 0xffff,
872 hlo(x) - x = (x >> 32) & 0xffff,
873 hhi(x) - x = (x >> 48) & 0xffff
874 The value _MUST_ be constant expression: #hlo(1231231231). */
878 if (strncasecmp (h, "#llo(", 5) == 0)
883 else if (strncasecmp (h, "#lhi(", 5) == 0)
888 else if (strncasecmp (h, "#hlo(", 5) == 0)
893 else if (strncasecmp (h, "#hhi(", 5) == 0)
898 else if (strncasecmp (h, "#lo(", 4) == 0)
903 else if (strncasecmp (h, "#hi(", 4) == 0)
909 op->reg = 0; /* Reg PC. */
911 op->ol = 1; /* Immediate will follow an instruction. */
914 parse_exp (__tl, &(op->exp));
915 if (op->exp.X_op == O_constant)
917 int x = op->exp.X_add_number;
922 op->exp.X_add_number = x;
924 else if (vshift == 1)
926 x = (x >> 16) & 0xffff;
927 op->exp.X_add_number = x;
932 op->exp.X_add_number = -1;
934 op->exp.X_add_number = 0; /* Nothing left. */
935 x = op->exp.X_add_number;
938 if (op->exp.X_add_number > 65535 || op->exp.X_add_number < -32768)
940 as_bad (_("value %ld out of range. Use #lo() or #hi()"), x);
944 /* Now check constants. */
945 /* Substitude register mode with a constant generator if applicable. */
947 x = (short) x; /* Extend sign. */
979 #ifdef PUSH_1X_WORKAROUND
981 && (msp430_mcu->isa == MSP430_ISA_11
982 || msp430_mcu->isa == MSP430_ISA_12
983 || msp430_mcu->isa == MSP430_ISA_13
984 || msp430_mcu->isa == MSP430_ISA_14))
986 /* Remove warning as confusing.
987 as_warn(_("Hardware push bug workaround")); */
1000 #ifdef PUSH_1X_WORKAROUND
1002 && (msp430_mcu->isa == MSP430_ISA_11
1003 || msp430_mcu->isa == MSP430_ISA_12
1004 || msp430_mcu->isa == MSP430_ISA_13
1005 || msp430_mcu->isa == MSP430_ISA_14))
1007 /* Remove warning as confusing.
1008 as_warn(_("Hardware push bug workaround")); */
1020 else if (op->exp.X_op == O_symbol)
1024 else if (op->exp.X_op == O_big)
1029 op->exp.X_op = O_constant;
1030 op->exp.X_add_number = 0xffff & generic_bignum[vshift];
1031 x = op->exp.X_add_number;
1036 ("unknown expression in operand %s. use #llo() #lhi() #hlo() #hhi() "),
1086 as_bad (_("unknown operand %s"), l);
1091 /* Check if absolute &VALUE (assume that we can construct something like ((a&b)<<7 + 25). */
1096 op->reg = 2; /* reg 2 in absolute addr mode. */
1097 op->am = 1; /* mode As == 01 bin. */
1098 op->ol = 1; /* Immediate value followed by instruction. */
1100 parse_exp (__tl, &(op->exp));
1102 if (op->exp.X_op == O_constant)
1104 int x = op->exp.X_add_number;
1105 if (x > 65535 || x < -32768)
1107 as_bad (_("value out of range: %d"), x);
1111 else if (op->exp.X_op == O_symbol)
1116 as_bad (_("unknown expression in operand %s"), l);
1122 /* Check if inderect register mode @Rn / postincrement @Rn+. */
1126 char *m = strchr (l, '+');
1130 as_bad (_("unknown addressing mode %s"), l);
1135 if (*t != 'r' && *t != 'R')
1137 as_bad (_("unknown addressing mode %s"), l);
1141 t++; /* Points to the reg value. */
1145 as_bad (_("Bad register name r%s"), t);
1153 *m = 0; /* strip '+' */
1155 if (op->reg < 0 || op->reg > 15)
1157 as_bad (_("MSP430 does not have %d registers"), op->reg);
1164 /* Check if register indexed X(Rn). */
1167 char *h = strrchr (l, '(');
1168 char *m = strrchr (l, ')');
1177 as_bad (_("')' required"));
1184 /* Extract a register. */
1185 t++; /* Advance pointer. */
1187 if (*t != 'r' && *t != 'R')
1190 ("unknown operator %s. Did you mean X(Rn) or #[hl][hl][oi](CONST) ?"),
1197 if (op->reg > 9 || op->reg < 0)
1199 as_bad (_("unknown operator (r%s substituded as a register name"),
1206 op->reg = op->reg * 10;
1207 op->reg += *t - '0';
1211 as_bad (_("unknown operator %s"), l);
1216 as_bad (_("r2 should not be used in indexed addressing mode"));
1220 if (*(t + 1) != ')')
1222 as_bad (_("unknown operator %s"), l);
1227 /* Extract constant. */
1231 parse_exp (__tl, &(op->exp));
1232 if (op->exp.X_op == O_constant)
1234 int x = op->exp.X_add_number;
1236 if (x > 65535 || x < -32768)
1238 as_bad (_("value out of range: %d"), x);
1250 else if (op->exp.X_op == O_symbol)
1255 as_bad (_("unknown expression in operand %s"), l);
1263 /* Register mode 'mov r1,r2'. */
1268 /* Operand should be a register. */
1269 if (*t == 'r' || *t == 'R')
1271 int x = atoi (t + 1);
1273 if (check_reg (t + 1))
1276 if (x < 0 || x > 15)
1277 break; /* Symbolic mode. */
1288 /* Symbolic mode 'mov a, b' == 'mov x(pc), y(pc)'. */
1297 /* alpha/number underline dot for labels. */
1298 if (! ISALNUM (*t) && *t != '_' && *t != '.')
1300 as_bad (_("unknown operand %s"), l);
1307 op->reg = 0; /* PC relative... be careful. */
1311 parse_exp (__tl, &(op->exp));
1317 as_bad (_("unknown addressing mode for operand %s"), l);
1322 /* GAS will call this function for each section at the end of the assembly,
1323 to permit the CPU backend to adjust the alignment of a section. */
1326 md_section_align (seg, addr)
1330 int align = bfd_get_section_alignment (stdoutput, seg);
1332 return ((addr + (1 << align) - 1) & (-1 << align));
1335 /* If you define this macro, it should return the offset between the
1336 address of a PC relative fixup and the position from which the PC
1337 relative adjustment should be made. On many processors, the base
1338 of a PC relative instruction is the next instruction, so this
1339 macro would return the length of an instruction. */
1342 md_pcrel_from_section (fixp, sec)
1346 if (fixp->fx_addsy != (symbolS *) NULL
1347 && (!S_IS_DEFINED (fixp->fx_addsy)
1348 || (S_GET_SEGMENT (fixp->fx_addsy) != sec)))
1351 return fixp->fx_frag->fr_address + fixp->fx_where;
1354 /* GAS will call this for each fixup. It should store the correct
1355 value in the object file. */
1358 md_apply_fix3 (fixp, valuep, seg)
1363 unsigned char *where;
1367 if (fixp->fx_addsy == (symbolS *) NULL)
1372 else if (fixp->fx_pcrel)
1374 segT s = S_GET_SEGMENT (fixp->fx_addsy);
1376 if (fixp->fx_addsy && (s == seg || s == absolute_section))
1378 value = S_GET_VALUE (fixp->fx_addsy) + *valuep;
1386 value = fixp->fx_offset;
1388 if (fixp->fx_subsy != (symbolS *) NULL)
1390 if (S_GET_SEGMENT (fixp->fx_subsy) == absolute_section)
1392 value -= S_GET_VALUE (fixp->fx_subsy);
1397 /* We don't actually support subtracting a symbol. */
1398 as_bad_where (fixp->fx_file, fixp->fx_line,
1399 _("expression too complex"));
1404 switch (fixp->fx_r_type)
1407 fixp->fx_no_overflow = 1;
1409 case BFD_RELOC_MSP430_10_PCREL:
1415 /* Fetch the instruction, insert the fully resolved operand
1416 value, and stuff the instruction back again. */
1418 where = fixp->fx_frag->fr_literal + fixp->fx_where;
1420 insn = bfd_getl16 (where);
1422 switch (fixp->fx_r_type)
1424 case BFD_RELOC_MSP430_10_PCREL:
1426 as_bad_where (fixp->fx_file, fixp->fx_line,
1427 _("odd address operand: %ld"), value);
1429 /* Jumps are in words. */
1431 --value; /* Correct PC. */
1433 if (value < -512 || value > 511)
1434 as_bad_where (fixp->fx_file, fixp->fx_line,
1435 _("operand out of range: %ld"), value);
1437 value &= 0x3ff; /* get rid of extended sign */
1438 bfd_putl16 ((bfd_vma) (value | insn), where);
1441 case BFD_RELOC_MSP430_16_PCREL:
1443 as_bad_where (fixp->fx_file, fixp->fx_line,
1444 _("odd address operand: %ld"), value);
1446 /* Nothing to be corrected here. */
1447 if (value < -32768 || value > 65536)
1448 as_bad_where (fixp->fx_file, fixp->fx_line,
1449 _("operand out of range: %ld"), value);
1451 value &= 0xffff; /* Get rid of extended sign. */
1452 bfd_putl16 ((bfd_vma) value, where);
1455 case BFD_RELOC_MSP430_16_PCREL_BYTE:
1456 /* Nothing to be corrected here. */
1457 if (value < -32768 || value > 65536)
1458 as_bad_where (fixp->fx_file, fixp->fx_line,
1459 _("operand out of range: %ld"), value);
1461 value &= 0xffff; /* Get rid of extended sign. */
1462 bfd_putl16 ((bfd_vma) value, where);
1466 bfd_putl16 ((bfd_vma) value, where);
1469 case BFD_RELOC_MSP430_16:
1471 case BFD_RELOC_MSP430_16_BYTE:
1473 bfd_putl16 ((bfd_vma) value, where);
1477 as_fatal (_("line %d: unknown relocation type: 0x%x"),
1478 fixp->fx_line, fixp->fx_r_type);
1484 fixp->fx_addnumber = value;
1489 /* A `BFD_ASSEMBLER' GAS will call this to generate a reloc. GAS
1490 will pass the resulting reloc to `bfd_install_relocation'. This
1491 currently works poorly, as `bfd_install_relocation' often does the
1492 wrong thing, and instances of `tc_gen_reloc' have been written to
1493 work around the problems, which in turns makes it difficult to fix
1494 `bfd_install_relocation'. */
1496 /* If while processing a fixup, a reloc really needs to be created
1497 then it is done here. */
1500 tc_gen_reloc (seg, fixp)
1501 asection *seg ATTRIBUTE_UNUSED;
1506 reloc = (arelent *) xmalloc (sizeof (arelent));
1508 reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *));
1509 *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
1511 reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
1512 reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type);
1513 if (reloc->howto == (reloc_howto_type *) NULL)
1515 as_bad_where (fixp->fx_file, fixp->fx_line,
1516 _("reloc %d not supported by object file format"),
1517 (int) fixp->fx_r_type);
1521 if (fixp->fx_r_type == BFD_RELOC_VTABLE_INHERIT
1522 || fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
1523 reloc->address = fixp->fx_offset;
1525 reloc->addend = fixp->fx_offset;
1530 /* Parse ordinary expression. */
1537 input_line_pointer = s;
1539 if (op->X_op == O_absent)
1540 as_bad (_("missing operand"));
1541 return input_line_pointer;
1546 md_estimate_size_before_relax (fragp, seg)
1547 fragS *fragp ATTRIBUTE_UNUSED;
1548 asection *seg ATTRIBUTE_UNUSED;