1 /* tc-mcore.c -- Assemble code for M*Core
2 Copyright (C) 1999, 2000 Free Software Foundation.
4 This file is part of GAS, the GNU Assembler.
6 GAS is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GAS is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GAS; see the file COPYING. If not, write to the Free
18 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
26 #include "../opcodes/mcore-opc.h"
31 #include "elf/mcore.h"
35 #define streq(a,b) (strcmp (a, b) == 0)
38 /* Forward declarations for dumb compilers. */
39 static void mcore_s_literals PARAMS ((int));
40 static void mcore_cons PARAMS ((int));
41 static void mcore_float_cons PARAMS ((int));
42 static void mcore_stringer PARAMS ((int));
43 static void mcore_fill PARAMS ((int));
44 static int log2 PARAMS ((unsigned int));
45 static char * parse_reg PARAMS ((char *, unsigned *));
46 static char * parse_creg PARAMS ((char *, unsigned *));
47 static char * parse_exp PARAMS ((char *, expressionS *));
48 static char * parse_rt PARAMS ((char *, char **, int, expressionS *));
49 static char * parse_imm PARAMS ((char *, unsigned *, unsigned, unsigned));
50 static char * parse_mem PARAMS ((char *, unsigned *, unsigned *, unsigned));
51 static char * parse_psrmod PARAMS ((char *, unsigned *));
52 static void make_name PARAMS ((char *, char *, int));
53 static int enter_literal PARAMS ((expressionS *, int));
54 static void dump_literals PARAMS ((int));
55 static void check_literals PARAMS ((int, int));
56 static void mcore_s_text PARAMS ((int));
57 static void mcore_s_data PARAMS ((int));
58 static void mcore_s_section PARAMS ((int));
59 static void mcore_s_bss PARAMS ((int));
61 static void mcore_s_comm PARAMS ((int));
64 /* Several places in this file insert raw instructions into the
65 object. They should use MCORE_INST_XXX macros to get the opcodes
66 and then use these two macros to crack the MCORE_INST value into
67 the appropriate byte values. */
68 #define INST_BYTE0(x) (target_big_endian ? (((x) >> 8) & 0xFF) : ((x) & 0xFF))
69 #define INST_BYTE1(x) (target_big_endian ? ((x) & 0xFF) : (((x) >> 8) & 0xFF))
71 const char comment_chars[] = "#/";
72 const char line_separator_chars[] = ";";
73 const char line_comment_chars[] = "#/";
75 const int md_reloc_size = 8;
77 static int do_jsri2bsr = 0; /* Change here from 1 by Cruess 19 August 97. */
78 static int sifilter_mode = 0;
80 const char EXP_CHARS[] = "eE";
82 /* Chars that mean this number is a floating point constant
85 const char FLT_CHARS[] = "rRsSfFdDxXpP";
87 #define C(what,length) (((what) << 2) + (length))
88 #define GET_WHAT(x) ((x >> 2))
90 /* These are the two types of relaxable instruction */
99 #define UNDEF_WORD_DISP 4
103 #define C32_LEN 10 /* allow for align */
105 #define U32_LEN 8 /* allow for align */
116 /* Initialize the relax table. */
117 const relax_typeS md_relax_table[] =
119 { 1, 1, 0, 0 }, /* 0: unused */
120 { 1, 1, 0, 0 }, /* 1: unused */
121 { 1, 1, 0, 0 }, /* 2: unused */
122 { 1, 1, 0, 0 }, /* 3: unused */
123 { 1, 1, 0, 0 }, /* 4: unused */
124 { 2048, -2046, C12_LEN, C(COND_JUMP, COND32) }, /* 5: C(COND_JUMP, COND12) */
125 { 0, 0, C32_LEN, 0 }, /* 6: C(COND_JUMP, COND32) */
126 { 1, 1, 0, 0 }, /* 7: unused */
127 { 1, 1, 0, 0 }, /* 8: unused */
128 { 2048, -2046, U12_LEN, C(UNCD_JUMP, UNCD32) }, /* 9: C(UNCD_JUMP, UNCD12) */
129 { 0, 0, U32_LEN, 0 }, /*10: C(UNCD_JUMP, UNCD32) */
130 { 1, 1, 0, 0 }, /*11: unused */
131 { 0, 0, 0, 0 } /*12: unused */
134 /* Literal pool data structures. */
137 unsigned short refcnt;
138 unsigned char ispcrel;
139 unsigned char unused;
143 #define MAX_POOL_SIZE (1024/4)
144 static struct literal litpool [MAX_POOL_SIZE];
145 static unsigned poolsize;
146 static unsigned poolnumber;
147 static unsigned long poolspan;
149 /* SPANPANIC: the point at which we get too scared and force a dump
150 of the literal pool, and perhaps put a branch in place.
152 1024 span of lrw/jmpi/jsri insn (actually span+1)
153 -2 possible alignment at the insn.
154 -2 possible alignment to get the table aligned.
155 -2 an inserted branch around the table.
157 at 1018, we might be in trouble.
158 -- so we have to be smaller than 1018 and since we deal with 2-byte
159 instructions, the next good choice is 1016.
160 -- Note we have a test case that fails when we've got 1018 here. */
161 #define SPANPANIC (1016) /* 1024 - 1 entry - 2 byte rounding. */
162 #define SPANCLOSE (900)
163 #define SPANEXIT (600)
164 static symbolS * poolsym; /* label for current pool. */
165 static char poolname[8];
166 static struct hash_control * opcode_hash_control; /* Opcode mnemonics. */
168 /* This table describes all the machine specific pseudo-ops the assembler
169 has to support. The fields are:
170 Pseudo-op name without dot
171 Function to call to execute this pseudo-op
172 Integer arg to pass to the function. */
173 const pseudo_typeS md_pseudo_table[] =
175 { "export", s_globl, 0 },
176 { "import", s_ignore, 0 },
177 { "literals", mcore_s_literals, 0 },
178 { "page", listing_eject, 0 },
180 /* The following are to intercept the placement of data into the text
181 section (eg addresses for a switch table), so that the space they
182 occupy can be taken into account when deciding whether or not to
183 dump the current literal pool.
184 XXX - currently we do not cope with the .space and .dcb.d directives. */
185 { "ascii", mcore_stringer, 0 },
186 { "asciz", mcore_stringer, 1 },
187 { "byte", mcore_cons, 1 },
188 { "dc", mcore_cons, 2 },
189 { "dc.b", mcore_cons, 1 },
190 { "dc.d", mcore_float_cons, 'd'},
191 { "dc.l", mcore_cons, 4 },
192 { "dc.s", mcore_float_cons, 'f'},
193 { "dc.w", mcore_cons, 2 },
194 { "dc.x", mcore_float_cons, 'x'},
195 { "double", mcore_float_cons, 'd'},
196 { "float", mcore_float_cons, 'f'},
197 { "hword", mcore_cons, 2 },
198 { "int", mcore_cons, 4 },
199 { "long", mcore_cons, 4 },
200 { "octa", mcore_cons, 16 },
201 { "quad", mcore_cons, 8 },
202 { "short", mcore_cons, 2 },
203 { "single", mcore_float_cons, 'f'},
204 { "string", mcore_stringer, 1 },
205 { "word", mcore_cons, 2 },
206 { "fill", mcore_fill, 0 },
208 /* Allow for the effect of section changes. */
209 { "text", mcore_s_text, 0 },
210 { "data", mcore_s_data, 0 },
211 { "bss", mcore_s_bss, 1 },
213 { "comm", mcore_s_comm, 0 },
215 { "section", mcore_s_section, 0 },
216 { "section.s", mcore_s_section, 0 },
217 { "sect", mcore_s_section, 0 },
218 { "sect.s", mcore_s_section, 0 },
224 mcore_s_literals (ignore)
228 demand_empty_rest_of_line ();
236 if (now_seg == text_section)
238 char * ptr = input_line_pointer;
241 /* Count the number of commas on the line. */
242 while (! is_end_of_line [(unsigned char) * ptr])
243 commas += * ptr ++ == ',';
245 poolspan += nbytes * commas;
250 /* In theory we ought to call check_literals (2,0) here in case
251 we need to dump the literal table. We cannot do this however,
252 as the directives that we are intercepting may be being used
253 to build a switch table, and we must not interfere with its
254 contents. Instead we cross our fingers and pray... */
258 mcore_float_cons (float_type)
261 if (now_seg == text_section)
263 char * ptr = input_line_pointer;
266 #ifdef REPEAT_CONS_EXPRESSIONS
267 #error REPEAT_CONS_EXPRESSIONS not handled
270 /* Count the number of commas on the line. */
271 while (! is_end_of_line [(unsigned char) * ptr])
272 commas += * ptr ++ == ',';
274 /* We would like to compute "hex_float (float_type) * commas"
275 but hex_float is not exported from read.c */
276 float_type == 'f' ? 4 : (float_type == 'd' ? 8 : 12);
277 poolspan += float_type * commas;
280 float_cons (float_type);
282 /* See the comment in mcore_cons () about calling check_literals.
283 It is unlikely that a switch table will be constructed using
284 floating point values, but it is still likely that an indexed
285 table of floating point constants is being created by these
286 directives, so again we must not interfere with their placement. */
290 mcore_stringer (append_zero)
293 if (now_seg == text_section)
295 char * ptr = input_line_pointer;
297 /* In theory we should compute how many bytes are going to
298 be occupied by the string(s) and add this to the poolspan.
299 To keep things simple however, we just add the number of
300 bytes left on the current line. This will be an over-
301 estimate, which is OK, and automatically allows for the
302 appending a zero byte, since the real string(s) is/are
303 required to be enclosed in double quotes. */
304 while (! is_end_of_line [(unsigned char) * ptr])
307 poolspan += ptr - input_line_pointer;
310 stringer (append_zero);
312 /* We call check_literals here in case a large number of strings are
313 being placed into the text section with a sequence of stringer
314 directives. In theory we could be upsetting something if these
315 strings are actually in an indexed table instead of referenced by
316 individual labels. Let us hope that that never happens. */
317 check_literals (2, 0);
324 if (now_seg == text_section)
326 char * str = input_line_pointer;
332 /* Look to see if a size has been specified. */
333 while (*str != '\n' && *str != 0 && *str != ',')
338 size = atoi (str + 1);
346 poolspan += size * repeat;
351 check_literals (2, 0);
354 /* Handle the section changing pseudo-ops. These call through to the
355 normal implementations, but they dump the literal pool first. */
357 mcore_s_text (ignore)
363 obj_elf_text (ignore);
370 mcore_s_data (ignore)
376 obj_elf_data (ignore);
383 mcore_s_section (ignore)
386 /* Scan forwards to find the name of the section. If the section
387 being switched to is ".line" then this is a DWARF1 debug section
388 which is arbitarily placed inside generated code. In this case
389 do not dump the literal pool because it is a) inefficient and
390 b) would require the generation of extra code to jump around the
392 char * ilp = input_line_pointer;
394 while (*ilp != 0 && isspace(*ilp))
397 if (strncmp (ilp, ".line", 5) == 0
398 && (isspace (ilp[5]) || *ilp == '\n' || *ilp == '\r'))
404 obj_elf_section (ignore);
407 obj_coff_section (ignore);
412 mcore_s_bss (needs_align)
417 s_lcomm_bytes (needs_align);
422 mcore_s_comm (needs_align)
427 obj_elf_common (needs_align);
431 /* This function is called once, at assembler startup time. This should
432 set up all the tables, etc that the MD part of the assembler needs. */
436 mcore_opcode_info * opcode;
437 char * prev_name = "";
439 opcode_hash_control = hash_new ();
441 /* Insert unique names into hash table */
442 for (opcode = mcore_table; opcode->name; opcode ++)
444 if (streq (prev_name, opcode->name))
446 /* Make all the opcodes with the same name point to the same
448 opcode->name = prev_name;
452 prev_name = opcode->name;
453 hash_insert (opcode_hash_control, opcode->name, (char *) opcode);
460 static expressionS immediate; /* absolute expression */
462 /* Get a log2(val). */
477 /* Try to parse a reg name. */
483 /* Strip leading whitespace. */
484 while (isspace (* s))
487 if (tolower (s[0]) == 'r')
489 if (s[1] == '1' && s[2] >= '0' && s[2] <= '5')
491 *reg = 10 + s[2] - '0';
495 if (s[1] >= '0' && s[1] <= '9')
501 else if ( tolower (s[0]) == 's'
502 && tolower (s[1]) == 'p'
509 as_bad (_("register expected, but saw '%.6s'"), s);
543 /* Strip leading whitespace. */
544 while (isspace (* s))
547 if ((tolower (s[0]) == 'c' && tolower (s[1]) == 'r'))
549 if (s[2] == '3' && s[3] >= '0' && s[3] <= '1')
551 *reg = 30 + s[3] - '0';
555 if (s[2] == '2' && s[3] >= '0' && s[3] <= '9')
557 *reg = 20 + s[3] - '0';
561 if (s[2] == '1' && s[3] >= '0' && s[3] <= '9')
563 *reg = 10 + s[3] - '0';
567 if (s[2] >= '0' && s[2] <= '9')
574 /* Look at alternate creg names before giving error. */
575 for (i = 0; cregs[i].name[0] != '\0'; i++)
581 length = strlen (cregs[i].name);
583 for (j = 0; j < length; j++)
584 buf[j] = tolower (s[j]);
586 if (strncmp (cregs[i].name, buf, length) == 0)
588 *reg = cregs[i].crnum;
593 as_bad (_("control register expected, but saw '%.6s'"), s);
599 parse_psrmod (s, reg)
605 static struct psrmods
615 { "af", 8 } /* Really 0 and non-combinable. */
618 for (i = 0; i < 2; i++)
619 buf[i] = isascii (s[i]) ? tolower (s[i]) : 0;
621 for (i = sizeof (psrmods) / sizeof (psrmods[0]); i--;)
623 if (! strncmp (psrmods[i].name, buf, 2))
625 * reg = psrmods[i].value;
631 as_bad (_("bad/missing psr specifier"));
646 /* Skip whitespace. */
647 while (isspace (* s))
650 save = input_line_pointer;
651 input_line_pointer = s;
655 if (e->X_op == O_absent)
656 as_bad (_("missing operand"));
658 new = input_line_pointer;
659 input_line_pointer = save;
670 static const char hex[] = "0123456789ABCDEF";
675 s[3] = hex[(n >> 12) & 0xF];
676 s[4] = hex[(n >> 8) & 0xF];
677 s[5] = hex[(n >> 4) & 0xF];
678 s[6] = hex[(n) & 0xF];
682 #define POOL_END_LABEL ".LE"
683 #define POOL_START_LABEL ".LS"
686 dump_literals (isforce)
696 /* Must we branch around the literal table? */
702 make_name (brarname, POOL_END_LABEL, poolnumber);
704 brarsym = symbol_make (brarname);
706 symbol_table_insert (brarsym);
708 output = frag_var (rs_machine_dependent,
709 md_relax_table[C (UNCD_JUMP, UNCD32)].rlx_length,
710 md_relax_table[C (UNCD_JUMP, UNCD12)].rlx_length,
711 C (UNCD_JUMP, 0), brarsym, 0, 0);
712 output[0] = INST_BYTE0 (MCORE_INST_BR); /* br .+xxx */
713 output[1] = INST_BYTE1 (MCORE_INST_BR);
716 /* Make sure that the section is sufficiently aligned and that
717 the literal table is aligned within it. */
718 record_alignment (now_seg, 2);
719 frag_align (2, 0, 0);
721 colon (S_GET_NAME (poolsym));
723 for (i = 0, p = litpool; i < poolsize; i++, p++)
724 emit_expr (& p->e, 4);
727 colon (S_GET_NAME (brarsym));
733 check_literals (kind, offset)
739 /* SPANCLOSE and SPANEXIT are smaller numbers than SPANPANIC.
740 SPANPANIC means that we must dump now.
741 kind == 0 is any old instruction.
742 kind > 0 means we just had a control transfer instruction.
743 kind == 1 means within a function
744 kind == 2 means we just left a function
746 The dump_literals (1) call inserts a branch around the table, so
747 we first look to see if its a situation where we won't have to
748 insert a branch (e.g., the previous instruction was an unconditional
751 SPANPANIC is the point where we must dump a single-entry pool.
752 it accounts for alignments and an inserted branch.
753 the 'poolsize*2' accounts for the scenario where we do:
754 lrw r1,lit1; lrw r2,lit2; lrw r3,lit3
755 Note that the 'lit2' reference is 2 bytes further along
756 but the literal it references will be 4 bytes further along,
757 so we must consider the poolsize into this equation.
758 This is slightly over-cautious, but guarantees that we won't
759 panic because a relocation is too distant. */
761 if (poolspan > SPANCLOSE && kind > 0)
763 else if (poolspan > SPANEXIT && kind > 1)
765 else if (poolspan >= (SPANPANIC - poolsize * 2))
770 enter_literal (e, ispcrel)
777 if (poolsize >= MAX_POOL_SIZE - 2)
779 /* The literal pool is as full as we can handle. We have
780 to be 2 entries shy of the 1024/4=256 entries because we
781 have to allow for the branch (2 bytes) and the alignment
782 (2 bytes before the first insn referencing the pool and
783 2 bytes before the pool itself) == 6 bytes, rounds up
790 /* Create new literal pool. */
791 if (++ poolnumber > 0xFFFF)
792 as_fatal (_("more than 65K literal pools"));
794 make_name (poolname, POOL_START_LABEL, poolnumber);
795 poolsym = symbol_make (poolname);
796 symbol_table_insert (poolsym);
800 /* Search pool for value so we don't have duplicates. */
801 for (p = litpool, i = 0; i < poolsize; i++, p++)
803 if (e->X_op == p->e.X_op
804 && e->X_add_symbol == p->e.X_add_symbol
805 && e->X_add_number == p->e.X_add_number
806 && ispcrel == p->ispcrel)
814 p->ispcrel = ispcrel;
822 /* Parse a literal specification. -- either new or old syntax.
823 old syntax: the user supplies the label and places the literal.
824 new syntax: we put it into the literal pool. */
826 parse_rt (s, outputp, ispcrel, ep)
836 /* Indicate nothing there. */
841 s = parse_exp (s + 1, & e);
846 as_bad (_("missing ']'"));
850 s = parse_exp (s, & e);
852 n = enter_literal (& e, ispcrel);
857 /* Create a reference to pool entry. */
859 e.X_add_symbol = poolsym;
860 e.X_add_number = n << 2;
863 * outputp = frag_more (2);
865 fix_new_exp (frag_now, (*outputp) - frag_now->fr_literal, 2, & e, 1,
866 BFD_RELOC_MCORE_PCREL_IMM8BY4);
872 parse_imm (s, val, min, max)
881 new = parse_exp (s, & e);
883 if (e.X_op == O_absent)
884 ; /* An error message has already been emitted. */
885 else if (e.X_op != O_constant)
886 as_bad (_("operand must be a constant"));
887 else if (e.X_add_number < min || e.X_add_number > max)
888 as_bad (_("operand must be absolute in range %d..%d, not %d"),
889 min, max, e.X_add_number);
891 * val = e.X_add_number;
897 parse_mem (s, reg, off, siz)
907 while (isspace (* s))
912 s = parse_reg (s + 1, reg);
914 while (isspace (* s))
919 s = parse_imm (s + 1, off, 0, 63);
926 as_bad (_("operand must be a multiple of 4"));
933 as_bad (_("operand must be a multiple of 2"));
940 while (isspace (* s))
947 as_bad (_("base register expected"));
952 /* This is the guts of the machine-dependent assembler. STR points to a
953 machine dependent instruction. This function is supposed to emit
954 the frags/bytes it assembles to. */
962 mcore_opcode_info * opcode;
972 /* Drop leading whitespace. */
973 while (isspace (* str))
976 /* Find the op code end. */
977 for (op_start = op_end = str;
978 nlen < 20 && !is_end_of_line [(unsigned char) *op_end] && *op_end != ' ';
981 name[nlen] = op_start[nlen];
989 as_bad (_("can't find opcode "));
993 opcode = (mcore_opcode_info *) hash_find (opcode_hash_control, name);
996 as_bad (_("unknown opcode \"%s\""), name);
1000 inst = opcode->inst;
1003 switch (opcode->opclass)
1006 output = frag_more (2);
1010 op_end = parse_imm (op_end + 1, & reg, 0, 3);
1012 output = frag_more (2);
1016 op_end = parse_reg (op_end + 1, & reg);
1018 output = frag_more (2);
1022 op_end = parse_reg (op_end + 1, & reg);
1024 output = frag_more (2);
1025 /* In a sifilter mode, we emit this insn 2 times,
1026 fixes problem of an interrupt during a jmp.. */
1029 output[0] = INST_BYTE0 (inst);
1030 output[1] = INST_BYTE1 (inst);
1031 output = frag_more (2);
1036 op_end = parse_reg (op_end + 1, & reg);
1039 as_bad (_("invalid register: r15 illegal"));
1042 output = frag_more (2);
1046 /* Replace with: bsr .+2 ; addi r15,6; jmp rx ; jmp rx */
1047 inst = MCORE_INST_BSR; /* with 0 displacement */
1048 output[0] = INST_BYTE0 (inst);
1049 output[1] = INST_BYTE1 (inst);
1051 output = frag_more (2);
1052 inst = MCORE_INST_ADDI;
1053 inst |= 15; /* addi r15,6 */
1054 inst |= (6 - 1) << 4; /* over the jmp's */
1055 output[0] = INST_BYTE0 (inst);
1056 output[1] = INST_BYTE1 (inst);
1058 output = frag_more (2);
1059 inst = MCORE_INST_JMP | reg;
1060 output[0] = INST_BYTE0 (inst);
1061 output[1] = INST_BYTE1 (inst);
1063 output = frag_more (2); /* 2nd emitted in fallthru */
1068 op_end = parse_reg (op_end + 1, & reg);
1071 /* Skip whitespace. */
1072 while (isspace (* op_end))
1077 op_end = parse_creg (op_end + 1, & reg);
1081 output = frag_more (2);
1087 as_bad (_("M340 specific opcode used when assembling for M210"));
1090 /* drop through... */
1092 op_end = parse_reg (op_end + 1, & reg);
1095 /* Skip whitespace. */
1096 while (isspace (* op_end))
1099 if (* op_end == ',')
1101 op_end = parse_reg (op_end + 1, & reg);
1105 as_bad (_("second operand missing"));
1107 output = frag_more (2);
1110 case X1: /* Handle both syntax-> xtrb- r1,rx OR xtrb- rx */
1111 op_end = parse_reg (op_end + 1, & reg);
1113 /* Skip whitespace. */
1114 while (isspace (* op_end))
1117 if (* op_end == ',') /* xtrb- r1,rx */
1120 as_bad (_("destination register must be r1"));
1122 op_end = parse_reg (op_end + 1, & reg);
1126 output = frag_more (2);
1129 case O1R1: /* div- rx,r1 */
1130 op_end = parse_reg (op_end + 1, & reg);
1133 /* Skip whitespace. */
1134 while (isspace (* op_end))
1137 if (* op_end == ',')
1139 op_end = parse_reg (op_end + 1, & reg);
1141 as_bad (_("source register must be r1"));
1144 as_bad (_("second operand missing"));
1146 output = frag_more (2);
1150 op_end = parse_reg (op_end + 1, & reg);
1153 /* Skip whitespace. */
1154 while (isspace (* op_end))
1157 if (* op_end == ',')
1159 op_end = parse_imm (op_end + 1, & reg, 1, 32);
1160 inst |= (reg - 1) << 4;
1163 as_bad (_("second operand missing"));
1165 output = frag_more (2);
1169 op_end = parse_reg (op_end + 1, & reg);
1172 /* Skip whitespace. */
1173 while (isspace (* op_end))
1176 if (* op_end == ',')
1178 op_end = parse_imm (op_end + 1, & reg, 0, 31);
1182 as_bad (_("second operand missing"));
1184 output = frag_more (2);
1187 case OB2: /* like OB, but arg is 2^n instead of n */
1188 op_end = parse_reg (op_end + 1, & reg);
1191 /* Skip whitespace. */
1192 while (isspace (* op_end))
1195 if (* op_end == ',')
1197 op_end = parse_imm (op_end + 1, & reg, 1, 1 << 31);
1198 /* Further restrict the immediate to a power of two. */
1199 if ((reg & (reg - 1)) == 0)
1204 as_bad (_("immediate is not a power of two"));
1209 as_bad (_("second operand missing"));
1211 output = frag_more (2);
1214 case OBRa: /* Specific for bgeni: imm of 0->6 translate to movi. */
1217 op_end = parse_reg (op_end + 1, & reg);
1220 /* Skip whitespace. */
1221 while (isspace (* op_end))
1224 if (* op_end == ',')
1226 op_end = parse_imm (op_end + 1, & reg, 0, 31);
1227 /* immediate values of 0 -> 6 translate to movi */
1230 inst = (inst & 0xF) | MCORE_INST_BGENI_ALT;
1232 as_warn (_("translating bgeni to movi"));
1238 as_bad (_("second operand missing"));
1240 output = frag_more (2);
1243 case OBR2: /* like OBR, but arg is 2^n instead of n */
1244 op_end = parse_reg (op_end + 1, & reg);
1247 /* Skip whitespace. */
1248 while (isspace (* op_end))
1251 if (* op_end == ',')
1253 op_end = parse_imm (op_end + 1, & reg, 1, 1 << 31);
1255 /* Further restrict the immediate to a power of two. */
1256 if ((reg & (reg - 1)) == 0)
1261 as_bad (_("immediate is not a power of two"));
1264 /* Immediate values of 0 -> 6 translate to movi. */
1267 inst = (inst & 0xF) | MCORE_INST_BGENI_ALT;
1269 as_warn (_("translating mgeni to movi"));
1275 as_bad (_("second operand missing"));
1277 output = frag_more (2);
1280 case OMa: /* Specific for bmaski: imm 1->7 translate to movi. */
1283 op_end = parse_reg (op_end + 1, & reg);
1286 /* Skip whitespace. */
1287 while (isspace (* op_end))
1290 if (* op_end == ',')
1292 op_end = parse_imm (op_end + 1, & reg, 1, 32);
1294 /* Immediate values of 1 -> 7 translate to movi. */
1297 inst = (inst & 0xF) | MCORE_INST_BMASKI_ALT;
1298 reg = (0x1 << reg) - 1;
1301 as_warn (_("translating bmaski to movi"));
1306 inst |= (reg & 0x1F) << 4;
1310 as_bad (_("second operand missing"));
1312 output = frag_more (2);
1316 op_end = parse_reg (op_end + 1, & reg);
1319 /* Skip whitespace. */
1320 while (isspace (* op_end))
1323 if (* op_end == ',')
1325 op_end = parse_imm (op_end + 1, & reg, 1, 31);
1329 as_bad (_("second operand missing"));
1331 output = frag_more (2);
1335 op_end = parse_reg (op_end + 1, & reg);
1338 /* Skip whitespace. */
1339 while (isspace (* op_end))
1342 if (* op_end == ',')
1344 op_end = parse_imm (op_end + 1, & reg, 0, 0x7F);
1348 as_bad (_("second operand missing"));
1350 output = frag_more (2);
1354 op_end = parse_reg (op_end + 1, & reg);
1357 /* Skip whitespace. */
1358 while (isspace (* op_end))
1361 if (* op_end == ',')
1365 if ((inst & 0x6000) == 0)
1367 else if ((inst & 0x6000) == 0x4000)
1369 else if ((inst & 0x6000) == 0x2000)
1372 op_end = parse_mem (op_end + 1, & reg, & off, size);
1375 as_bad (_("displacement too large (%d)"), off);
1377 inst |= (reg) | (off << 4);
1380 as_bad (_("second operand missing"));
1382 output = frag_more (2);
1386 op_end = parse_reg (op_end + 1, & reg);
1388 if (reg == 0 || reg == 15)
1389 as_bad (_("Invalid register: r0 and r15 illegal"));
1393 /* Skip whitespace. */
1394 while (isspace (* op_end))
1397 if (* op_end == ',')
1399 /* parse_rt calls frag_more() for us. */
1400 input_line_pointer = parse_rt (op_end + 1, & output, 0, 0);
1401 op_end = input_line_pointer;
1405 as_bad (_("second operand missing"));
1406 output = frag_more (2); /* save its space */
1411 input_line_pointer = parse_rt (op_end + 1, & output, 1, 0);
1412 /* parse_rt() calls frag_more() for us. */
1413 op_end = input_line_pointer;
1417 op_end = parse_reg (op_end + 1, & reg);
1419 if (reg == 0 || reg == 15)
1420 as_bad (_("bad starting register: r0 and r15 invalid"));
1424 /* Skip whitespace. */
1425 while (isspace (* op_end))
1428 if (* op_end == '-')
1430 op_end = parse_reg (op_end + 1, & reg);
1433 as_bad (_("ending register must be r15"));
1435 /* Skip whitespace. */
1436 while (isspace (* op_end))
1440 if (* op_end == ',')
1444 /* Skip whitespace. */
1445 while (isspace (* op_end))
1448 if (* op_end == '(')
1450 op_end = parse_reg (op_end + 1, & reg);
1453 as_bad (_("bad base register: must be r0"));
1455 if (* op_end == ')')
1459 as_bad (_("base register expected"));
1462 as_bad (_("second operand missing"));
1464 output = frag_more (2);
1468 op_end = parse_reg (op_end + 1, & reg);
1471 as_fatal (_("first register must be r4"));
1473 /* Skip whitespace. */
1474 while (isspace (* op_end))
1477 if (* op_end == '-')
1479 op_end = parse_reg (op_end + 1, & reg);
1482 as_fatal (_("last register must be r7"));
1484 /* Skip whitespace. */
1485 while (isspace (* op_end))
1488 if (* op_end == ',')
1492 /* Skip whitespace. */
1493 while (isspace (* op_end))
1496 if (* op_end == '(')
1498 op_end = parse_reg (op_end + 1, & reg);
1500 if (reg >= 4 && reg <= 7)
1501 as_fatal ("base register cannot be r4, r5, r6, or r7");
1505 /* Skip whitespace. */
1506 while (isspace (* op_end))
1509 if (* op_end == ')')
1513 as_bad (_("base register expected"));
1516 as_bad (_("second operand missing"));
1519 as_bad (_("reg-reg expected"));
1521 output = frag_more (2);
1525 input_line_pointer = parse_exp (op_end + 1, & e);
1526 op_end = input_line_pointer;
1528 output = frag_more (2);
1530 fix_new_exp (frag_now, output-frag_now->fr_literal,
1531 2, & e, 1, BFD_RELOC_MCORE_PCREL_IMM11BY2);
1535 op_end = parse_reg (op_end + 1, & reg);
1538 /* Skip whitespace. */
1539 while (isspace (* op_end))
1542 if (* op_end == ',')
1544 op_end = parse_exp (op_end + 1, & e);
1545 output = frag_more (2);
1547 fix_new_exp (frag_now, output-frag_now->fr_literal,
1548 2, & e, 1, BFD_RELOC_MCORE_PCREL_IMM4BY2);
1552 as_bad (_("second operand missing"));
1553 output = frag_more (2);
1558 input_line_pointer = parse_exp (op_end + 1, & e);
1559 op_end = input_line_pointer;
1561 output = frag_var (rs_machine_dependent,
1562 md_relax_table[C (COND_JUMP, COND32)].rlx_length,
1563 md_relax_table[C (COND_JUMP, COND12)].rlx_length,
1564 C (COND_JUMP, 0), e.X_add_symbol, e.X_add_number, 0);
1569 input_line_pointer = parse_exp (op_end + 1, & e);
1570 op_end = input_line_pointer;
1572 output = frag_var (rs_machine_dependent,
1573 md_relax_table[C (UNCD_JUMP, UNCD32)].rlx_length,
1574 md_relax_table[C (UNCD_JUMP, UNCD12)].rlx_length,
1575 C (UNCD_JUMP, 0), e.X_add_symbol, e.X_add_number, 0);
1580 inst = MCORE_INST_JSRI; /* jsri */
1581 input_line_pointer = parse_rt (op_end + 1, & output, 1, & e);
1582 /* parse_rt() calls frag_more for us. */
1583 op_end = input_line_pointer;
1585 /* Only do this if we know how to do it ... */
1586 if (e.X_op != O_absent && do_jsri2bsr)
1588 /* Look at adding the R_PCREL_JSRIMM11BY2. */
1589 fix_new_exp (frag_now, output-frag_now->fr_literal,
1590 2, & e, 1, BFD_RELOC_MCORE_PCREL_JSR_IMM11BY2);
1594 case RSI: /* SI, but imm becomes 32-imm */
1595 op_end = parse_reg (op_end + 1, & reg);
1598 /* Skip whitespace. */
1599 while (isspace (* op_end))
1602 if (* op_end == ',')
1604 op_end = parse_imm (op_end + 1, & reg, 1, 31);
1610 as_bad (_("second operand missing"));
1612 output = frag_more (2);
1615 case DO21: /* O2, dup rd, lit must be 1 */
1616 op_end = parse_reg (op_end + 1, & reg);
1620 /* Skip whitespace. */
1621 while (isspace (* op_end))
1624 if (* op_end == ',')
1626 op_end = parse_imm (op_end + 1, & reg, 1, 31);
1629 as_bad (_("second operand must be 1"));
1632 as_bad (_("second operand missing"));
1634 output = frag_more (2);
1638 op_end = parse_reg (op_end + 1, & reg);
1641 /* Skip whitespace. */
1642 while (isspace (* op_end))
1645 if (* op_end == ',')
1647 op_end = parse_imm (op_end + 1, & reg, 1, 31);
1650 as_bad (_("zero used as immediate value"));
1655 as_bad (_("second operand missing"));
1657 output = frag_more (2);
1663 as_bad (_("M340 specific opcode used when assembling for M210"));
1667 op_end = parse_psrmod (op_end + 1, & reg);
1669 /* Look for further selectors. */
1670 while (* op_end == ',')
1674 op_end = parse_psrmod (op_end + 1, & value);
1677 as_bad (_("duplicated psr bit specifier"));
1683 as_bad (_("`af' must appear alone"));
1685 inst |= (reg & 0x7);
1686 output = frag_more (2);
1690 as_bad (_("unimplemented opcode \"%s\""), name);
1693 /* Drop whitespace after all the operands have been parsed. */
1694 while (isspace (* op_end))
1697 /* Give warning message if the insn has more operands than required. */
1698 if (strcmp (op_end, opcode->name) && strcmp (op_end, ""))
1699 as_warn (_("ignoring operands: %s "), op_end);
1701 output[0] = INST_BYTE0 (inst);
1702 output[1] = INST_BYTE1 (inst);
1704 check_literals (opcode->transfer, isize);
1708 md_undefined_symbol (name)
1718 subseg_set (text_section, 0);
1721 /* Various routines to kill one day. */
1722 /* Equal to MAX_PRECISION in atof-ieee.c */
1723 #define MAX_LITTLENUMS 6
1725 /* Turn a string in input_line_pointer into a floating point constant of type
1726 type, and store the appropriate bytes in *litP. The number of LITTLENUMS
1727 emitted is stored in *sizeP. An error message is returned, or NULL on OK.*/
1729 md_atof (type, litP, sizeP)
1735 LITTLENUM_TYPE words[MAX_LITTLENUMS];
1738 char * atof_ieee ();
1768 return _("Bad call to MD_NTOF()");
1771 t = atof_ieee (input_line_pointer, type, words);
1774 input_line_pointer = t;
1776 *sizeP = prec * sizeof (LITTLENUM_TYPE);
1778 if (! target_big_endian)
1780 for (i = prec - 1; i >= 0; i--)
1782 md_number_to_chars (litP, (valueT) words[i],
1783 sizeof (LITTLENUM_TYPE));
1784 litP += sizeof (LITTLENUM_TYPE);
1788 for (i = 0; i < prec; i++)
1790 md_number_to_chars (litP, (valueT) words[i],
1791 sizeof (LITTLENUM_TYPE));
1792 litP += sizeof (LITTLENUM_TYPE);
1798 CONST char * md_shortopts = "";
1800 #define OPTION_JSRI2BSR_ON (OPTION_MD_BASE + 0)
1801 #define OPTION_JSRI2BSR_OFF (OPTION_MD_BASE + 1)
1802 #define OPTION_SIFILTER_ON (OPTION_MD_BASE + 2)
1803 #define OPTION_SIFILTER_OFF (OPTION_MD_BASE + 3)
1804 #define OPTION_CPU (OPTION_MD_BASE + 4)
1805 #define OPTION_EB (OPTION_MD_BASE + 5)
1806 #define OPTION_EL (OPTION_MD_BASE + 6)
1808 struct option md_longopts[] =
1810 { "no-jsri2bsr", no_argument, NULL, OPTION_JSRI2BSR_OFF},
1811 { "jsri2bsr", no_argument, NULL, OPTION_JSRI2BSR_ON},
1812 { "sifilter", no_argument, NULL, OPTION_SIFILTER_ON},
1813 { "no-sifilter", no_argument, NULL, OPTION_SIFILTER_OFF},
1814 { "cpu", required_argument, NULL, OPTION_CPU},
1815 { "EB", no_argument, NULL, OPTION_EB},
1816 { "EL", no_argument, NULL, OPTION_EL},
1817 { NULL, no_argument, NULL, 0}
1820 size_t md_longopts_size = sizeof (md_longopts);
1823 md_parse_option (c, arg)
1833 if (streq (arg, "210"))
1836 target_big_endian = 1;
1838 else if (streq (arg, "340"))
1841 as_warn (_("unrecognised cpu type '%s'"), arg);
1844 case OPTION_EB: target_big_endian = 1; break;
1845 case OPTION_EL: target_big_endian = 0; cpu = M340; break;
1846 case OPTION_JSRI2BSR_ON: do_jsri2bsr = 1; break;
1847 case OPTION_JSRI2BSR_OFF: do_jsri2bsr = 0; break;
1848 case OPTION_SIFILTER_ON: sifilter_mode = 1; break;
1849 case OPTION_SIFILTER_OFF: sifilter_mode = 0; break;
1857 md_show_usage (stream)
1860 fprintf (stream, _("\
1861 MCORE specific options:\n\
1862 -{no-}jsri2bsr {dis}able jsri to bsr transformation (def: dis)\n\
1863 -{no-}sifilter {dis}able silicon filter behavior (def: dis)\n\
1864 -cpu=[210|340] select CPU type\n\
1865 -EB assemble for a big endian system (default)\n\
1866 -EL assemble for a little endian system\n"));
1869 int md_short_jump_size;
1872 md_create_short_jump (ptr, from_Nddr, to_Nddr, frag, to_symbol)
1877 symbolS * to_symbol;
1879 as_fatal (_("failed sanity check: short_jump"));
1883 md_create_long_jump (ptr, from_Nddr, to_Nddr, frag, to_symbol)
1888 symbolS * to_symbol;
1890 as_fatal (_("failed sanity check: long_jump"));
1893 /* Called after relaxing, change the frags so they know how big they are. */
1895 md_convert_frag (abfd, sec, fragP)
1898 register fragS * fragP;
1900 unsigned char * buffer;
1901 int targ_addr = S_GET_VALUE (fragP->fr_symbol) + fragP->fr_offset;
1903 buffer = (unsigned char *) (fragP->fr_fix + fragP->fr_literal);
1904 targ_addr += symbol_get_frag (fragP->fr_symbol)->fr_address;
1906 switch (fragP->fr_subtype)
1908 case C (COND_JUMP, COND12):
1909 case C (UNCD_JUMP, UNCD12):
1911 /* Get the address of the end of the instruction. */
1912 int next_inst = fragP->fr_fix + fragP->fr_address + 2;
1914 int disp = targ_addr - next_inst;
1917 as_bad (_("odd displacement at %x"), next_inst - 2);
1921 if (! target_big_endian)
1923 t0 = buffer[1] & 0xF8;
1925 md_number_to_chars (buffer, disp, 2);
1927 buffer[1] = (buffer[1] & 0x07) | t0;
1931 t0 = buffer[0] & 0xF8;
1933 md_number_to_chars (buffer, disp, 2);
1935 buffer[0] = (buffer[0] & 0x07) | t0;
1943 case C (COND_JUMP, COND32):
1944 case C (COND_JUMP, UNDEF_WORD_DISP):
1946 /* A conditional branch wont fit into 12 bits so:
1953 * if the b!cond is 4 byte aligned, the literal which would
1954 * go at x+4 will also be aligned.
1956 int first_inst = fragP->fr_fix + fragP->fr_address;
1957 int needpad = (first_inst & 3);
1959 if (! target_big_endian)
1962 buffer[0] ^= 0x08; /* Toggle T/F bit */
1964 buffer[2] = INST_BYTE0 (MCORE_INST_JMPI); /* Build jmpi */
1965 buffer[3] = INST_BYTE1 (MCORE_INST_JMPI);
1969 if (! target_big_endian)
1971 buffer[0] = 4; /* branch over jmpi, pad, and ptr */
1972 buffer[2] = 1; /* jmpi offset of 1 gets the pointer */
1976 buffer[1] = 4; /* branch over jmpi, pad, and ptr */
1977 buffer[3] = 1; /* jmpi offset of 1 gets the pointer */
1980 buffer[4] = 0; /* alignment/pad */
1982 buffer[6] = 0; /* space for 32 bit address */
1987 /* Make reloc for the long disp */
1988 fix_new (fragP, fragP->fr_fix + 6, 4,
1989 fragP->fr_symbol, fragP->fr_offset, 0, BFD_RELOC_32);
1991 fragP->fr_fix += C32_LEN;
1995 /* See comment below about this given gas' limitations for
1996 shrinking the fragment. '3' is the amount of code that
1997 we inserted here, but '4' is right for the space we reserved
1998 for this fragment. */
1999 if (! target_big_endian)
2001 buffer[0] = 3; /* branch over jmpi, and ptr */
2002 buffer[2] = 0; /* jmpi offset of 0 gets the pointer */
2006 buffer[1] = 3; /* branch over jmpi, and ptr */
2007 buffer[3] = 0; /* jmpi offset of 0 gets the pointer */
2010 buffer[4] = 0; /* space for 32 bit address */
2015 /* Make reloc for the long disp. */
2016 fix_new (fragP, fragP->fr_fix + 4, 4,
2017 fragP->fr_symbol, fragP->fr_offset, 0, BFD_RELOC_32);
2018 fragP->fr_fix += C32_LEN;
2020 /* Frag is actually shorter (see the other side of this ifdef)
2021 but gas isn't prepared for that. We have to re-adjust
2022 the branch displacement so that it goes beyond the
2023 full length of the fragment, not just what we actually
2025 if (! target_big_endian)
2026 buffer[0] = 4; /* jmpi, ptr, and the 'tail pad' */
2028 buffer[1] = 4; /* jmpi, ptr, and the 'tail pad' */
2035 case C (UNCD_JUMP, UNCD32):
2036 case C (UNCD_JUMP, UNDEF_WORD_DISP):
2038 /* An unconditional branch will not fit in 12 bits, make code which
2043 we need a pad if "first_inst" is 4 byte aligned.
2044 [because the natural literal place is x + 2] */
2045 int first_inst = fragP->fr_fix + fragP->fr_address;
2046 int needpad = !(first_inst & 3);
2048 buffer[0] = INST_BYTE0 (MCORE_INST_JMPI); /* Build jmpi */
2049 buffer[1] = INST_BYTE1 (MCORE_INST_JMPI);
2053 if (! target_big_endian)
2054 buffer[0] = 1; /* jmpi offset of 1 since padded */
2056 buffer[1] = 1; /* jmpi offset of 1 since padded */
2057 buffer[2] = 0; /* alignment */
2059 buffer[4] = 0; /* space for 32 bit address */
2064 /* Make reloc for the long disp. */
2065 fix_new (fragP, fragP->fr_fix + 4, 4,
2066 fragP->fr_symbol, fragP->fr_offset, 0, BFD_RELOC_32);
2068 fragP->fr_fix += U32_LEN;
2072 if (! target_big_endian)
2073 buffer[0] = 0; /* jmpi offset of 0 if no pad */
2075 buffer[1] = 0; /* jmpi offset of 0 if no pad */
2076 buffer[2] = 0; /* space for 32 bit address */
2081 /* Make reloc for the long disp. */
2082 fix_new (fragP, fragP->fr_fix + 2, 4,
2083 fragP->fr_symbol, fragP->fr_offset, 0, BFD_RELOC_32);
2084 fragP->fr_fix += U32_LEN;
2096 /* Applies the desired value to the specified location.
2097 Also sets up addends for 'rela' type relocations. */
2099 md_apply_fix3 (fixP, valp, segment)
2104 char * buf = fixP->fx_where + fixP->fx_frag->fr_literal;
2105 char * file = fixP->fx_file ? fixP->fx_file : _("unknown");
2106 const char * symname;
2107 /* Note: use offsetT because it is signed, valueT is unsigned. */
2108 offsetT val = (offsetT) * valp;
2110 symname = fixP->fx_addsy ? S_GET_NAME (fixP->fx_addsy) : _("<unknown>");
2111 /* Save this for the addend in the relocation record. */
2112 fixP->fx_addnumber = val;
2114 /* If the fix is relative to a symbol which is not defined, or not
2115 in the same segment as the fix, we cannot resolve it here. */
2116 if (fixP->fx_addsy != NULL
2117 && ( ! S_IS_DEFINED (fixP->fx_addsy)
2118 || (S_GET_SEGMENT (fixP->fx_addsy) != segment)))
2122 /* For ELF we can just return and let the reloc that will be generated
2123 take care of everything. For COFF we still have to insert 'val'
2124 into the insn since the addend field will be ignored. */
2131 switch (fixP->fx_r_type)
2133 case BFD_RELOC_MCORE_PCREL_IMM11BY2: /* second byte of 2 byte opcode */
2135 as_bad_where (file, fixP->fx_line,
2136 _("odd distance branch (0x%x bytes)"), val);
2138 if (((val & ~0x3ff) != 0) && ((val | 0x3ff) != -1))
2139 as_bad_where (file, fixP->fx_line,
2140 _("pcrel for branch to %s too far (0x%x)"),
2142 if (target_big_endian)
2144 buf[0] |= ((val >> 8) & 0x7);
2145 buf[1] |= (val & 0xff);
2149 buf[1] |= ((val >> 8) & 0x7);
2150 buf[0] |= (val & 0xff);
2154 case BFD_RELOC_MCORE_PCREL_IMM8BY4: /* lower 8 bits of 2 byte opcode */
2158 as_bad_where (file, fixP->fx_line,
2159 _("pcrel for lrw/jmpi/jsri to %s too far (0x%x)"),
2161 else if (! target_big_endian)
2162 buf[0] |= (val & 0xff);
2164 buf[1] |= (val & 0xff);
2167 case BFD_RELOC_MCORE_PCREL_IMM4BY2: /* loopt instruction */
2168 if ((val < -32) || (val > -2))
2169 as_bad_where (file, fixP->fx_line,
2170 _("pcrel for loopt too far (0x%x)"), val);
2172 if (! target_big_endian)
2173 buf[0] |= (val & 0xf);
2175 buf[1] |= (val & 0xf);
2178 case BFD_RELOC_MCORE_PCREL_JSR_IMM11BY2:
2179 /* Conditional linker map jsri to bsr. */
2180 /* If its a local target and close enough, fix it.
2181 NB: >= -2k for backwards bsr; < 2k for forwards... */
2182 if (fixP->fx_addsy == 0 && val >= -2048 && val < 2048)
2184 long nval = (val / 2) & 0x7ff;
2185 nval |= MCORE_INST_BSR;
2187 /* REPLACE the instruction, don't just modify it. */
2188 buf[0] = INST_BYTE0 (nval);
2189 buf[1] = INST_BYTE1 (nval);
2195 case BFD_RELOC_MCORE_PCREL_32:
2196 case BFD_RELOC_VTABLE_INHERIT:
2197 case BFD_RELOC_VTABLE_ENTRY:
2202 if (fixP->fx_addsy != NULL)
2204 /* If the fix is an absolute reloc based on a symbol's
2205 address, then it cannot be resolved until the final link. */
2212 if (fixP->fx_size == 4)
2214 else if (fixP->fx_size == 2 && val >= -32768 && val <= 32767)
2216 else if (fixP->fx_size == 1 && val >= -256 && val <= 255)
2220 md_number_to_chars (buf, val, fixP->fx_size);
2225 return 0; /* Return value is ignored. */
2229 md_operand (expressionP)
2230 expressionS * expressionP;
2232 /* Ignore leading hash symbol, if poresent. */
2233 if (* input_line_pointer == '#')
2235 input_line_pointer ++;
2236 expression (expressionP);
2240 int md_long_jump_size;
2242 /* Called just before address relaxation, return the length
2243 by which a fragment must grow to reach it's destination. */
2245 md_estimate_size_before_relax (fragP, segment_type)
2246 register fragS * fragP;
2247 register segT segment_type;
2249 switch (fragP->fr_subtype)
2251 case C (UNCD_JUMP, UNDEF_DISP):
2252 /* Used to be a branch to somewhere which was unknown. */
2253 if (!fragP->fr_symbol)
2255 fragP->fr_subtype = C (UNCD_JUMP, UNCD12);
2256 fragP->fr_var = md_relax_table[C (UNCD_JUMP, UNCD12)].rlx_length;
2258 else if (S_GET_SEGMENT (fragP->fr_symbol) == segment_type)
2260 fragP->fr_subtype = C (UNCD_JUMP, UNCD12);
2261 fragP->fr_var = md_relax_table[C (UNCD_JUMP, UNCD12)].rlx_length;
2265 fragP->fr_subtype = C (UNCD_JUMP, UNDEF_WORD_DISP);
2266 fragP->fr_var = md_relax_table[C (UNCD_JUMP, UNCD32)].rlx_length;
2267 return md_relax_table[C (UNCD_JUMP, UNCD32)].rlx_length;
2274 case C (COND_JUMP, UNDEF_DISP):
2275 /* Used to be a branch to somewhere which was unknown. */
2276 if (fragP->fr_symbol
2277 && S_GET_SEGMENT (fragP->fr_symbol) == segment_type)
2279 /* Got a symbol and it's defined in this segment, become byte
2280 sized - maybe it will fix up */
2281 fragP->fr_subtype = C (COND_JUMP, COND12);
2282 fragP->fr_var = md_relax_table[C (COND_JUMP, COND12)].rlx_length;
2284 else if (fragP->fr_symbol)
2286 /* Its got a segment, but its not ours, so it will always be long. */
2287 fragP->fr_subtype = C (COND_JUMP, UNDEF_WORD_DISP);
2288 fragP->fr_var = md_relax_table[C (COND_JUMP, COND32)].rlx_length;
2289 return md_relax_table[C (COND_JUMP, COND32)].rlx_length;
2293 /* We know the abs value. */
2294 fragP->fr_subtype = C (COND_JUMP, COND12);
2295 fragP->fr_var = md_relax_table[C (COND_JUMP, COND12)].rlx_length;
2301 return fragP->fr_var;
2304 /* Put number into target byte order. */
2306 md_number_to_chars (ptr, use, nbytes)
2311 if (! target_big_endian)
2314 case 4: ptr[3] = (use >> 24) & 0xff; /* fall through */
2315 case 3: ptr[2] = (use >> 16) & 0xff; /* fall through */
2316 case 2: ptr[1] = (use >> 8) & 0xff; /* fall through */
2317 case 1: ptr[0] = (use >> 0) & 0xff; break;
2323 case 4: *ptr++ = (use >> 24) & 0xff; /* fall through */
2324 case 3: *ptr++ = (use >> 16) & 0xff; /* fall through */
2325 case 2: *ptr++ = (use >> 8) & 0xff; /* fall through */
2326 case 1: *ptr++ = (use >> 0) & 0xff; break;
2331 /* Round up a section size to the appropriate boundary. */
2333 md_section_align (segment, size)
2337 return size; /* Byte alignment is fine */
2341 /* The location from which a PC relative jump should be calculated,
2342 given a PC relative reloc. */
2344 md_pcrel_from_section (fixp, sec)
2349 /* If the symbol is undefined or defined in another section
2350 we leave the add number alone for the linker to fix it later.
2351 Only account for the PC pre-bump (which is 2 bytes on the MCore). */
2352 if (fixp->fx_addsy != (symbolS *) NULL
2353 && (! S_IS_DEFINED (fixp->fx_addsy)
2354 || (S_GET_SEGMENT (fixp->fx_addsy) != sec)))
2357 assert (fixp->fx_size == 2); /* must be an insn */
2358 return fixp->fx_size;
2362 /* The case where we are going to resolve things... */
2363 return fixp->fx_size + fixp->fx_where + fixp->fx_frag->fr_address;
2366 #define F(SZ,PCREL) (((SZ) << 1) + (PCREL))
2367 #define MAP(SZ,PCREL,TYPE) case F (SZ, PCREL): code = (TYPE); break
2370 tc_gen_reloc (section, fixp)
2375 bfd_reloc_code_real_type code;
2378 switch (fixp->fx_r_type)
2380 /* These confuse the size/pcrel macro approach. */
2381 case BFD_RELOC_VTABLE_INHERIT:
2382 case BFD_RELOC_VTABLE_ENTRY:
2383 case BFD_RELOC_MCORE_PCREL_IMM4BY2:
2384 case BFD_RELOC_MCORE_PCREL_IMM8BY4:
2385 case BFD_RELOC_MCORE_PCREL_IMM11BY2:
2386 case BFD_RELOC_MCORE_PCREL_JSR_IMM11BY2:
2388 code = fixp->fx_r_type;
2392 switch (F (fixp->fx_size, fixp->fx_pcrel))
2394 MAP (1, 0, BFD_RELOC_8);
2395 MAP (2, 0, BFD_RELOC_16);
2396 MAP (4, 0, BFD_RELOC_32);
2397 MAP (1, 1, BFD_RELOC_8_PCREL);
2398 MAP (2, 1, BFD_RELOC_16_PCREL);
2399 MAP (4, 1, BFD_RELOC_32_PCREL);
2401 code = fixp->fx_r_type;
2402 as_bad (_("Can not do %d byte %srelocation"),
2404 fixp->fx_pcrel ? _("pc-relative") : "");
2409 rel = (arelent *) xmalloc (sizeof (arelent));
2410 rel->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *));
2411 *rel->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
2412 rel->address = fixp->fx_frag->fr_address + fixp->fx_where;
2413 /* Always pass the addend along! */
2414 rel->addend = fixp->fx_addnumber;
2416 rel->howto = bfd_reloc_type_lookup (stdoutput, code);
2418 if (rel->howto == NULL)
2420 as_bad_where (fixp->fx_file, fixp->fx_line,
2421 _("Cannot represent relocation type %s"),
2422 bfd_get_reloc_code_name (code));
2424 /* Set howto to a garbage value so that we can keep going. */
2425 rel->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_32);
2426 assert (rel->howto != NULL);
2433 /* See whether we need to force a relocation into the output file.
2434 This is used to force out switch and PC relative relocations when
2437 mcore_force_relocation (fix)
2440 if ( fix->fx_r_type == BFD_RELOC_VTABLE_INHERIT
2441 || fix->fx_r_type == BFD_RELOC_VTABLE_ENTRY
2442 || fix->fx_r_type == BFD_RELOC_RVA)
2448 /* Return true if the fix can be handled by GAS, false if it must
2449 be passed through to the linker. */
2451 mcore_fix_adjustable (fixP)
2454 if (fixP->fx_addsy == NULL)
2457 /* We need the symbol name for the VTABLE entries. */
2458 if ( fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT
2459 || fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
2464 #endif /* OBJ_ELF */