1 /* tc-avr.c -- Assembler code for the ATMEL AVR
3 Copyright 1999, 2000, 2001, 2002, 2004 Free Software Foundation, Inc.
4 Contributed by Denis Chertykov <denisc@overta.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. */
25 #include "safe-ctype.h"
32 int insn_size; /* In words. */
34 unsigned int bin_opcode;
37 #define AVR_INSN(NAME, CONSTR, OPCODE, SIZE, ISA, BIN) \
38 {#NAME, CONSTR, SIZE, ISA, BIN},
40 struct avr_opcodes_s avr_opcodes[] =
42 #include "opcode/avr.h"
46 const char comment_chars[] = ";";
47 const char line_comment_chars[] = "#";
48 const char line_separator_chars[] = "$";
50 const char *md_shortopts = "m:";
58 /* XXX - devices that don't seem to exist (renamed, replaced with larger
59 ones, or planned but never produced), left here for compatibility.
60 TODO: hide them in show_mcu_list output? */
62 static struct mcu_type_s mcu_types[] =
64 {"avr1", AVR_ISA_TINY1, bfd_mach_avr1},
65 {"avr2", AVR_ISA_2xxx, bfd_mach_avr2},
66 {"avr3", AVR_ISA_M103, bfd_mach_avr3},
67 {"avr4", AVR_ISA_M8, bfd_mach_avr4},
68 {"avr5", AVR_ISA_ALL, bfd_mach_avr5},
69 {"at90s1200", AVR_ISA_1200, bfd_mach_avr1},
70 {"attiny10", AVR_ISA_TINY1, bfd_mach_avr1}, /* XXX -> tn11 */
71 {"attiny11", AVR_ISA_TINY1, bfd_mach_avr1},
72 {"attiny12", AVR_ISA_TINY1, bfd_mach_avr1},
73 {"attiny15", AVR_ISA_TINY1, bfd_mach_avr1},
74 {"attiny28", AVR_ISA_TINY1, bfd_mach_avr1},
75 {"at90s2313", AVR_ISA_2xxx, bfd_mach_avr2},
76 {"at90s2323", AVR_ISA_2xxx, bfd_mach_avr2},
77 {"at90s2333", AVR_ISA_2xxx, bfd_mach_avr2}, /* XXX -> 4433 */
78 {"at90s2343", AVR_ISA_2xxx, bfd_mach_avr2},
79 {"attiny22", AVR_ISA_2xxx, bfd_mach_avr2}, /* XXX -> 2343 */
80 {"attiny26", AVR_ISA_2xxx, bfd_mach_avr2},
81 {"at90s4433", AVR_ISA_2xxx, bfd_mach_avr2},
82 {"at90s4414", AVR_ISA_2xxx, bfd_mach_avr2}, /* XXX -> 8515 */
83 {"at90s4434", AVR_ISA_2xxx, bfd_mach_avr2}, /* XXX -> 8535 */
84 {"at90s8515", AVR_ISA_2xxx, bfd_mach_avr2},
85 {"at90s8535", AVR_ISA_2xxx, bfd_mach_avr2},
86 {"at90c8534", AVR_ISA_2xxx, bfd_mach_avr2},
87 {"at86rf401", AVR_ISA_2xxx, bfd_mach_avr2},
88 {"atmega603", AVR_ISA_M603, bfd_mach_avr3}, /* XXX -> m103 */
89 {"atmega103", AVR_ISA_M103, bfd_mach_avr3},
90 {"at43usb320",AVR_ISA_M103, bfd_mach_avr3},
91 {"at43usb355",AVR_ISA_M603, bfd_mach_avr3},
92 {"at76c711", AVR_ISA_M603, bfd_mach_avr3},
93 {"atmega48", AVR_ISA_M8, bfd_mach_avr4},
94 {"atmega8", AVR_ISA_M8, bfd_mach_avr4},
95 {"atmega83", AVR_ISA_M8, bfd_mach_avr4}, /* XXX -> m8535 */
96 {"atmega85", AVR_ISA_M8, bfd_mach_avr4}, /* XXX -> m8 */
97 {"atmega88", AVR_ISA_M8, bfd_mach_avr4},
98 {"atmega8515",AVR_ISA_M8, bfd_mach_avr4},
99 {"atmega8535",AVR_ISA_M8, bfd_mach_avr4},
100 {"attiny13", AVR_ISA_TINY2, bfd_mach_avr4},
101 {"attiny2313",AVR_ISA_TINY2, bfd_mach_avr4},
102 {"atmega16", AVR_ISA_M323, bfd_mach_avr5},
103 {"atmega161", AVR_ISA_M161, bfd_mach_avr5},
104 {"atmega162", AVR_ISA_M323, bfd_mach_avr5},
105 {"atmega163", AVR_ISA_M161, bfd_mach_avr5},
106 {"atmega165", AVR_ISA_M323, bfd_mach_avr5},
107 {"atmega168", AVR_ISA_M323, bfd_mach_avr5},
108 {"atmega169", AVR_ISA_M323, bfd_mach_avr5},
109 {"atmega32", AVR_ISA_M323, bfd_mach_avr5},
110 {"atmega323", AVR_ISA_M323, bfd_mach_avr5},
111 {"atmega325", AVR_ISA_M323, bfd_mach_avr5},
112 {"atmega3250",AVR_ISA_M323, bfd_mach_avr5},
113 {"atmega64", AVR_ISA_M323, bfd_mach_avr5},
114 {"atmega128", AVR_ISA_M128, bfd_mach_avr5},
115 {"atmega645", AVR_ISA_M323, bfd_mach_avr5},
116 {"atmega6450",AVR_ISA_M323, bfd_mach_avr5},
117 {"at90can128",AVR_ISA_M128, bfd_mach_avr5},
118 {"at94k", AVR_ISA_94K, bfd_mach_avr5},
122 /* Current MCU type. */
123 static struct mcu_type_s default_mcu = {"avr2", AVR_ISA_2xxx,bfd_mach_avr2};
124 static struct mcu_type_s *avr_mcu = &default_mcu;
126 /* AVR target-specific switches. */
129 int all_opcodes; /* -mall-opcodes: accept all known AVR opcodes */
130 int no_skip_bug; /* -mno-skip-bug: no warnings for skipping 2-word insns */
131 int no_wrap; /* -mno-wrap: reject rjmp/rcall with 8K wrap-around */
134 static struct avr_opt_s avr_opt = { 0, 0, 0 };
136 const char EXP_CHARS[] = "eE";
137 const char FLT_CHARS[] = "dD";
138 static void avr_set_arch (int dummy);
140 /* The target specific pseudo-ops which we support. */
141 const pseudo_typeS md_pseudo_table[] =
143 {"arch", avr_set_arch, 0},
147 #define LDI_IMMEDIATE(x) (((x) & 0xf) | (((x) << 4) & 0xf00))
149 static void show_mcu_list PARAMS ((FILE *));
150 static char *skip_space PARAMS ((char *));
151 static char *extract_word PARAMS ((char *, char *, int));
152 static unsigned int avr_operand PARAMS ((struct avr_opcodes_s *,
153 int, char *, char **));
154 static unsigned int avr_operands PARAMS ((struct avr_opcodes_s *, char **));
155 static unsigned int avr_get_constant PARAMS ((char *, int));
156 static char *parse_exp PARAMS ((char *, expressionS *));
157 static bfd_reloc_code_real_type avr_ldi_expression PARAMS ((expressionS *));
159 #define EXP_MOD_NAME(i) exp_mod[i].name
160 #define EXP_MOD_RELOC(i) exp_mod[i].reloc
161 #define EXP_MOD_NEG_RELOC(i) exp_mod[i].neg_reloc
162 #define HAVE_PM_P(i) exp_mod[i].have_pm
167 bfd_reloc_code_real_type reloc;
168 bfd_reloc_code_real_type neg_reloc;
172 static struct exp_mod_s exp_mod[] =
174 {"hh8", BFD_RELOC_AVR_HH8_LDI, BFD_RELOC_AVR_HH8_LDI_NEG, 1},
175 {"pm_hh8", BFD_RELOC_AVR_HH8_LDI_PM, BFD_RELOC_AVR_HH8_LDI_PM_NEG, 0},
176 {"hi8", BFD_RELOC_AVR_HI8_LDI, BFD_RELOC_AVR_HI8_LDI_NEG, 1},
177 {"pm_hi8", BFD_RELOC_AVR_HI8_LDI_PM, BFD_RELOC_AVR_HI8_LDI_PM_NEG, 0},
178 {"lo8", BFD_RELOC_AVR_LO8_LDI, BFD_RELOC_AVR_LO8_LDI_NEG, 1},
179 {"pm_lo8", BFD_RELOC_AVR_LO8_LDI_PM, BFD_RELOC_AVR_LO8_LDI_PM_NEG, 0},
180 {"hlo8", -BFD_RELOC_AVR_LO8_LDI, -BFD_RELOC_AVR_LO8_LDI_NEG, 0},
181 {"hhi8", -BFD_RELOC_AVR_HI8_LDI, -BFD_RELOC_AVR_HI8_LDI_NEG, 0},
184 /* Opcode hash table. */
185 static struct hash_control *avr_hash;
187 /* Reloc modifiers hash control (hh8,hi8,lo8,pm_xx). */
188 static struct hash_control *avr_mod_hash;
190 #define OPTION_MMCU 'm'
191 #define OPTION_ALL_OPCODES (OPTION_MD_BASE + 1)
192 #define OPTION_NO_SKIP_BUG (OPTION_MD_BASE + 2)
193 #define OPTION_NO_WRAP (OPTION_MD_BASE + 3)
195 struct option md_longopts[] =
197 { "mmcu", required_argument, NULL, OPTION_MMCU },
198 { "mall-opcodes", no_argument, NULL, OPTION_ALL_OPCODES },
199 { "mno-skip-bug", no_argument, NULL, OPTION_NO_SKIP_BUG },
200 { "mno-wrap", no_argument, NULL, OPTION_NO_WRAP },
201 { NULL, no_argument, NULL, 0 }
204 size_t md_longopts_size = sizeof (md_longopts);
206 /* Display nicely formatted list of known MCU names. */
209 show_mcu_list (stream)
214 fprintf (stream, _("Known MCU names:"));
217 for (i = 0; mcu_types[i].name; i++)
219 int len = strlen (mcu_types[i].name);
224 fprintf (stream, " %s", mcu_types[i].name);
227 fprintf (stream, "\n %s", mcu_types[i].name);
232 fprintf (stream, "\n");
239 while (*s == ' ' || *s == '\t')
244 /* Extract one word from FROM and copy it to TO. */
247 extract_word (char *from, char *to, int limit)
253 /* Drop leading whitespace. */
254 from = skip_space (from);
257 /* Find the op code end. */
258 for (op_start = op_end = from; *op_end != 0 && is_part_of_name (*op_end);)
260 to[size++] = *op_end++;
261 if (size + 1 >= limit)
270 md_estimate_size_before_relax (fragp, seg)
271 fragS *fragp ATTRIBUTE_UNUSED;
272 asection *seg ATTRIBUTE_UNUSED;
279 md_show_usage (stream)
284 " -mmcu=[avr-name] select microcontroller variant\n"
285 " [avr-name] can be:\n"
286 " avr1 - AT90S1200, ATtiny1x, ATtiny28\n"
287 " avr2 - AT90S2xxx, AT90S4xxx, AT90S8xxx, ATtiny22\n"
288 " avr3 - ATmega103, ATmega603\n"
289 " avr4 - ATmega83, ATmega85\n"
290 " avr5 - ATmega161, ATmega163, ATmega32, AT94K\n"
291 " or immediate microcontroller name.\n"));
293 _(" -mall-opcodes accept all AVR opcodes, even if not supported by MCU\n"
294 " -mno-skip-bug disable warnings for skipping two-word instructions\n"
295 " (default for avr4, avr5)\n"
296 " -mno-wrap reject rjmp/rcall instructions with 8K wrap-around\n"
297 " (default for avr3, avr5)\n"));
298 show_mcu_list (stream);
303 int dummy ATTRIBUTE_UNUSED;
307 str = (char *) alloca (20);
308 input_line_pointer = extract_word (input_line_pointer, str, 20);
309 md_parse_option (OPTION_MMCU, str);
310 bfd_set_arch_mach (stdoutput, TARGET_ARCH, avr_mcu->mach);
314 md_parse_option (c, arg)
323 char *s = alloca (strlen (arg) + 1);
330 *t = TOLOWER (*arg1++);
334 for (i = 0; mcu_types[i].name; ++i)
335 if (strcmp (mcu_types[i].name, s) == 0)
338 if (!mcu_types[i].name)
340 show_mcu_list (stderr);
341 as_fatal (_("unknown MCU: %s\n"), arg);
344 /* It is OK to redefine mcu type within the same avr[1-5] bfd machine
345 type - this for allows passing -mmcu=... via gcc ASM_SPEC as well
346 as .arch ... in the asm output at the same time. */
347 if (avr_mcu == &default_mcu || avr_mcu->mach == mcu_types[i].mach)
348 avr_mcu = &mcu_types[i];
350 as_fatal (_("redefinition of mcu type `%s' to `%s'"),
351 avr_mcu->name, mcu_types[i].name);
354 case OPTION_ALL_OPCODES:
355 avr_opt.all_opcodes = 1;
357 case OPTION_NO_SKIP_BUG:
358 avr_opt.no_skip_bug = 1;
369 md_undefined_symbol (name)
370 char *name ATTRIBUTE_UNUSED;
375 /* Turn a string in input_line_pointer into a floating point constant
376 of type TYPE, and store the appropriate bytes in *LITP. The number
377 of LITTLENUMS emitted is stored in *SIZEP. An error message is
378 returned, or NULL on OK. */
381 md_atof (type, litP, sizeP)
387 LITTLENUM_TYPE words[4];
388 LITTLENUM_TYPE *wordP;
401 return _("bad call to md_atof");
404 t = atof_ieee (input_line_pointer, type, words);
406 input_line_pointer = t;
408 *sizeP = prec * sizeof (LITTLENUM_TYPE);
410 /* This loop outputs the LITTLENUMs in REVERSE order. */
411 for (wordP = words + prec - 1; prec--;)
413 md_number_to_chars (litP, (valueT) (*wordP--), sizeof (LITTLENUM_TYPE));
414 litP += sizeof (LITTLENUM_TYPE);
421 md_convert_frag (abfd, sec, fragP)
422 bfd *abfd ATTRIBUTE_UNUSED;
423 asection *sec ATTRIBUTE_UNUSED;
424 fragS *fragP ATTRIBUTE_UNUSED;
433 struct avr_opcodes_s *opcode;
434 avr_hash = hash_new ();
436 /* Insert unique names into hash table. This hash table then provides a
437 quick index to the first opcode with a particular name in the opcode
439 for (opcode = avr_opcodes; opcode->name; opcode++)
440 hash_insert (avr_hash, opcode->name, (char *) opcode);
442 avr_mod_hash = hash_new ();
444 for (i = 0; i < sizeof (exp_mod) / sizeof (exp_mod[0]); ++i)
445 hash_insert (avr_mod_hash, EXP_MOD_NAME (i), (void *) (i + 10));
447 bfd_set_arch_mach (stdoutput, TARGET_ARCH, avr_mcu->mach);
450 /* Resolve STR as a constant expression and return the result.
451 If result greater than MAX then error. */
454 avr_get_constant (str, max)
459 str = skip_space (str);
460 input_line_pointer = str;
463 if (ex.X_op != O_constant)
464 as_bad (_("constant value required"));
466 if (ex.X_add_number > max || ex.X_add_number < 0)
467 as_bad (_("number must be less than %d"), max + 1);
469 return ex.X_add_number;
472 /* Parse instruction operands.
473 Return binary opcode. */
476 avr_operands (opcode, line)
477 struct avr_opcodes_s *opcode;
480 char *op = opcode->constraints;
481 unsigned int bin = opcode->bin_opcode;
482 char *frag = frag_more (opcode->insn_size * 2);
484 int where = frag - frag_now->fr_literal;
485 static unsigned int prev = 0; /* Previous opcode. */
487 /* Opcode have operands. */
490 unsigned int reg1 = 0;
491 unsigned int reg2 = 0;
492 int reg1_present = 0;
493 int reg2_present = 0;
495 /* Parse first operand. */
496 if (REGISTER_P (*op))
498 reg1 = avr_operand (opcode, where, op, &str);
501 /* Parse second operand. */
514 if (REGISTER_P (*op))
517 str = skip_space (str);
519 as_bad (_("`,' required"));
520 str = skip_space (str);
522 reg2 = avr_operand (opcode, where, op, &str);
526 if (reg1_present && reg2_present)
527 reg2 = (reg2 & 0xf) | ((reg2 << 5) & 0x200);
528 else if (reg2_present)
536 /* Detect undefined combinations (like ld r31,Z+). */
537 if (!avr_opt.all_opcodes && AVR_UNDEF_P (bin))
538 as_warn (_("undefined combination of operands"));
540 if (opcode->insn_size == 2)
542 /* Warn if the previous opcode was cpse/sbic/sbis/sbrc/sbrs
543 (AVR core bug, fixed in the newer devices). */
545 if (!(avr_opt.no_skip_bug ||
546 (avr_mcu->isa & (AVR_ISA_MUL | AVR_ISA_MOVW)))
547 && AVR_SKIP_P (prev))
548 as_warn (_("skipping two-word instruction"));
550 bfd_putl32 ((bfd_vma) bin, frag);
553 bfd_putl16 ((bfd_vma) bin, frag);
560 /* Parse for ldd/std offset */
563 avr_offset_expression (expressionS *exp)
565 char *str = input_line_pointer;
570 str = extract_word (str, op, sizeof (op));
572 input_line_pointer = tmp;
575 /* Warn about expressions that fail to use lo8 (). */
576 if (exp->X_op == O_constant)
578 int x = exp->X_add_number;
580 if (x < -255 || x > 255)
581 as_warn (_("constant out of 8-bit range: %d"), x);
585 /* Parse one instruction operand.
586 Return operand bitmask. Also fixups can be generated. */
589 avr_operand (opcode, where, op, line)
590 struct avr_opcodes_s *opcode;
596 unsigned int op_mask = 0;
597 char *str = skip_space (*line);
601 /* Any register operand. */
607 if (*str == 'r' || *str == 'R')
611 str = extract_word (str, r_name, sizeof (r_name));
613 if (ISDIGIT (r_name[1]))
615 if (r_name[2] == '\0')
616 op_mask = r_name[1] - '0';
617 else if (r_name[1] != '0'
618 && ISDIGIT (r_name[2])
619 && r_name[3] == '\0')
620 op_mask = (r_name[1] - '0') * 10 + r_name[2] - '0';
625 op_mask = avr_get_constant (str, 31);
626 str = input_line_pointer;
634 if (op_mask < 16 || op_mask > 23)
635 as_bad (_("register r16-r23 required"));
641 as_bad (_("register number above 15 required"));
647 as_bad (_("even register number required"));
652 if ((op_mask & 1) || op_mask < 24)
653 as_bad (_("register r24, r26, r28 or r30 required"));
654 op_mask = (op_mask - 24) >> 1;
659 as_bad (_("register name or number from 0 to 31 required"));
668 str = skip_space (str + 1);
677 as_bad (_("pointer register (X, Y or Z) required"));
679 str = skip_space (str + 1);
684 as_bad (_("cannot both predecrement and postincrement"));
688 /* avr1 can do "ld r,Z" and "st Z,r" but no other pointer
689 registers, no predecrement, no postincrement. */
690 if (!avr_opt.all_opcodes && (op_mask & 0x100F)
691 && !(avr_mcu->isa & AVR_ISA_SRAM))
692 as_bad (_("addressing mode not supported"));
698 as_bad (_("can't predecrement"));
700 if (! (*str == 'z' || *str == 'Z'))
701 as_bad (_("pointer register Z required"));
703 str = skip_space (str + 1);
714 char c = TOLOWER (*str++);
719 as_bad (_("pointer register (Y or Z) required"));
720 str = skip_space (str);
723 input_line_pointer = str;
724 avr_offset_expression (& op_expr);
725 str = input_line_pointer;
726 fix_new_exp (frag_now, where, 3,
727 &op_expr, FALSE, BFD_RELOC_AVR_6);
733 str = parse_exp (str, &op_expr);
734 fix_new_exp (frag_now, where, opcode->insn_size * 2,
735 &op_expr, FALSE, BFD_RELOC_AVR_CALL);
739 str = parse_exp (str, &op_expr);
740 fix_new_exp (frag_now, where, opcode->insn_size * 2,
741 &op_expr, TRUE, BFD_RELOC_AVR_13_PCREL);
745 str = parse_exp (str, &op_expr);
746 fix_new_exp (frag_now, where, opcode->insn_size * 2,
747 &op_expr, TRUE, BFD_RELOC_AVR_7_PCREL);
751 str = parse_exp (str, &op_expr);
752 fix_new_exp (frag_now, where + 2, opcode->insn_size * 2,
753 &op_expr, FALSE, BFD_RELOC_16);
758 bfd_reloc_code_real_type r_type;
760 input_line_pointer = str;
761 r_type = avr_ldi_expression (&op_expr);
762 str = input_line_pointer;
763 fix_new_exp (frag_now, where, 3,
764 &op_expr, FALSE, r_type);
772 x = ~avr_get_constant (str, 255);
773 str = input_line_pointer;
774 op_mask |= (x & 0xf) | ((x << 4) & 0xf00);
779 input_line_pointer = str;
780 avr_offset_expression (& op_expr);
781 str = input_line_pointer;
782 fix_new_exp (frag_now, where, 3,
783 & op_expr, FALSE, BFD_RELOC_AVR_6_ADIW);
791 x = avr_get_constant (str, 7);
792 str = input_line_pointer;
803 x = avr_get_constant (str, 63);
804 str = input_line_pointer;
805 op_mask |= (x & 0xf) | ((x & 0x30) << 5);
813 x = avr_get_constant (str, 31);
814 str = input_line_pointer;
823 as_bad (_("unknown constraint `%c'"), *op);
830 /* GAS will call this function for each section at the end of the assembly,
831 to permit the CPU backend to adjust the alignment of a section. */
834 md_section_align (seg, addr)
838 int align = bfd_get_section_alignment (stdoutput, seg);
839 return ((addr + (1 << align) - 1) & (-1 << align));
842 /* If you define this macro, it should return the offset between the
843 address of a PC relative fixup and the position from which the PC
844 relative adjustment should be made. On many processors, the base
845 of a PC relative instruction is the next instruction, so this
846 macro would return the length of an instruction. */
849 md_pcrel_from_section (fixp, sec)
853 if (fixp->fx_addsy != (symbolS *) NULL
854 && (!S_IS_DEFINED (fixp->fx_addsy)
855 || (S_GET_SEGMENT (fixp->fx_addsy) != sec)))
858 return fixp->fx_frag->fr_address + fixp->fx_where;
861 /* GAS will call this for each fixup. It should store the correct
862 value in the object file. */
865 md_apply_fix3 (fixP, valP, seg)
870 unsigned char *where;
874 if (fixP->fx_addsy == (symbolS *) NULL)
877 else if (fixP->fx_pcrel)
879 segT s = S_GET_SEGMENT (fixP->fx_addsy);
881 if (s == seg || s == absolute_section)
883 value += S_GET_VALUE (fixP->fx_addsy);
888 /* We don't actually support subtracting a symbol. */
889 if (fixP->fx_subsy != (symbolS *) NULL)
890 as_bad_where (fixP->fx_file, fixP->fx_line, _("expression too complex"));
892 switch (fixP->fx_r_type)
895 fixP->fx_no_overflow = 1;
897 case BFD_RELOC_AVR_7_PCREL:
898 case BFD_RELOC_AVR_13_PCREL:
901 case BFD_RELOC_AVR_CALL:
907 /* Fetch the instruction, insert the fully resolved operand
908 value, and stuff the instruction back again. */
909 where = fixP->fx_frag->fr_literal + fixP->fx_where;
910 insn = bfd_getl16 (where);
912 switch (fixP->fx_r_type)
914 case BFD_RELOC_AVR_7_PCREL:
916 as_bad_where (fixP->fx_file, fixP->fx_line,
917 _("odd address operand: %ld"), value);
919 /* Instruction addresses are always right-shifted by 1. */
921 --value; /* Correct PC. */
923 if (value < -64 || value > 63)
924 as_bad_where (fixP->fx_file, fixP->fx_line,
925 _("operand out of range: %ld"), value);
926 value = (value << 3) & 0x3f8;
927 bfd_putl16 ((bfd_vma) (value | insn), where);
930 case BFD_RELOC_AVR_13_PCREL:
932 as_bad_where (fixP->fx_file, fixP->fx_line,
933 _("odd address operand: %ld"), value);
935 /* Instruction addresses are always right-shifted by 1. */
937 --value; /* Correct PC. */
939 if (value < -2048 || value > 2047)
941 /* No wrap for devices with >8K of program memory. */
942 if ((avr_mcu->isa & AVR_ISA_MEGA) || avr_opt.no_wrap)
943 as_bad_where (fixP->fx_file, fixP->fx_line,
944 _("operand out of range: %ld"), value);
948 bfd_putl16 ((bfd_vma) (value | insn), where);
952 bfd_putl16 ((bfd_vma) value, where);
956 bfd_putl16 ((bfd_vma) value, where);
959 case BFD_RELOC_AVR_16_PM:
960 bfd_putl16 ((bfd_vma) (value >> 1), where);
963 case BFD_RELOC_AVR_LDI:
965 as_bad_where (fixP->fx_file, fixP->fx_line,
966 _("operand out of range: %ld"), value);
967 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value), where);
970 case BFD_RELOC_AVR_6:
971 if ((value > 63) || (value < 0))
972 as_bad_where (fixP->fx_file, fixP->fx_line,
973 _("operand out of range: %ld"), value);
974 bfd_putl16 ((bfd_vma) insn | ((value & 7) | ((value & (3 << 3)) << 7) | ((value & (1 << 5)) << 8)), where);
977 case BFD_RELOC_AVR_6_ADIW:
978 if ((value > 63) || (value < 0))
979 as_bad_where (fixP->fx_file, fixP->fx_line,
980 _("operand out of range: %ld"), value);
981 bfd_putl16 ((bfd_vma) insn | (value & 0xf) | ((value & 0x30) << 2), where);
984 case BFD_RELOC_AVR_LO8_LDI:
985 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value), where);
988 case -BFD_RELOC_AVR_LO8_LDI:
989 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 16), where);
992 case BFD_RELOC_AVR_HI8_LDI:
993 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 8), where);
996 case -BFD_RELOC_AVR_HI8_LDI:
997 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 24), where);
1000 case BFD_RELOC_AVR_HH8_LDI:
1001 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 16), where);
1004 case BFD_RELOC_AVR_LO8_LDI_NEG:
1005 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value), where);
1008 case -BFD_RELOC_AVR_LO8_LDI_NEG:
1009 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 16), where);
1012 case BFD_RELOC_AVR_HI8_LDI_NEG:
1013 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 8), where);
1016 case -BFD_RELOC_AVR_HI8_LDI_NEG:
1017 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 24), where);
1020 case BFD_RELOC_AVR_HH8_LDI_NEG:
1021 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 16), where);
1024 case BFD_RELOC_AVR_LO8_LDI_PM:
1025 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 1), where);
1028 case BFD_RELOC_AVR_HI8_LDI_PM:
1029 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 9), where);
1032 case BFD_RELOC_AVR_HH8_LDI_PM:
1033 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 17), where);
1036 case BFD_RELOC_AVR_LO8_LDI_PM_NEG:
1037 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 1), where);
1040 case BFD_RELOC_AVR_HI8_LDI_PM_NEG:
1041 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 9), where);
1044 case BFD_RELOC_AVR_HH8_LDI_PM_NEG:
1045 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 17), where);
1048 case BFD_RELOC_AVR_CALL:
1052 x = bfd_getl16 (where);
1054 as_bad_where (fixP->fx_file, fixP->fx_line,
1055 _("odd address operand: %ld"), value);
1057 x |= ((value & 0x10000) | ((value << 3) & 0x1f00000)) >> 16;
1058 bfd_putl16 ((bfd_vma) x, where);
1059 bfd_putl16 ((bfd_vma) (value & 0xffff), where + 2);
1064 as_fatal (_("line %d: unknown relocation type: 0x%x"),
1065 fixP->fx_line, fixP->fx_r_type);
1071 switch (fixP->fx_r_type)
1073 case -BFD_RELOC_AVR_HI8_LDI_NEG:
1074 case -BFD_RELOC_AVR_HI8_LDI:
1075 case -BFD_RELOC_AVR_LO8_LDI_NEG:
1076 case -BFD_RELOC_AVR_LO8_LDI:
1077 as_bad_where (fixP->fx_file, fixP->fx_line,
1078 _("only constant expression allowed"));
1087 /* A `BFD_ASSEMBLER' GAS will call this to generate a reloc. GAS
1088 will pass the resulting reloc to `bfd_install_relocation'. This
1089 currently works poorly, as `bfd_install_relocation' often does the
1090 wrong thing, and instances of `tc_gen_reloc' have been written to
1091 work around the problems, which in turns makes it difficult to fix
1092 `bfd_install_relocation'. */
1094 /* If while processing a fixup, a reloc really needs to be created
1095 then it is done here. */
1098 tc_gen_reloc (seg, fixp)
1099 asection *seg ATTRIBUTE_UNUSED;
1104 reloc = (arelent *) xmalloc (sizeof (arelent));
1106 reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *));
1107 *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
1109 reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
1110 reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type);
1111 if (reloc->howto == (reloc_howto_type *) NULL)
1113 as_bad_where (fixp->fx_file, fixp->fx_line,
1114 _("reloc %d not supported by object file format"),
1115 (int) fixp->fx_r_type);
1119 if (fixp->fx_r_type == BFD_RELOC_VTABLE_INHERIT
1120 || fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
1121 reloc->address = fixp->fx_offset;
1123 reloc->addend = fixp->fx_offset;
1132 struct avr_opcodes_s *opcode;
1135 str = skip_space (extract_word (str, op, sizeof (op)));
1138 as_bad (_("can't find opcode "));
1140 opcode = (struct avr_opcodes_s *) hash_find (avr_hash, op);
1144 as_bad (_("unknown opcode `%s'"), op);
1148 /* Special case for opcodes with optional operands (lpm, elpm) -
1149 version with operands exists in avr_opcodes[] in the next entry. */
1151 if (*str && *opcode->constraints == '?')
1154 if (!avr_opt.all_opcodes && (opcode->isa & avr_mcu->isa) != opcode->isa)
1155 as_bad (_("illegal opcode %s for mcu %s"), opcode->name, avr_mcu->name);
1157 /* We used to set input_line_pointer to the result of get_operands,
1158 but that is wrong. Our caller assumes we don't change it. */
1160 char *t = input_line_pointer;
1161 avr_operands (opcode, &str);
1162 if (*skip_space (str))
1163 as_bad (_("garbage at end of line"));
1164 input_line_pointer = t;
1168 /* Parse ordinary expression. */
1175 input_line_pointer = s;
1177 if (op->X_op == O_absent)
1178 as_bad (_("missing operand"));
1179 return input_line_pointer;
1182 /* Parse special expressions (needed for LDI command):
1187 where xx is: hh, hi, lo. */
1189 static bfd_reloc_code_real_type
1190 avr_ldi_expression (exp)
1193 char *str = input_line_pointer;
1199 str = extract_word (str, op, sizeof (op));
1203 mod = (int) hash_find (avr_mod_hash, op);
1210 str = skip_space (str);
1218 if (strncmp ("pm(", str, 3) == 0
1219 || strncmp ("-(pm(", str, 5) == 0)
1221 if (HAVE_PM_P (mod))
1227 as_bad (_("illegal expression"));
1239 if (*str == '-' && *(str + 1) == '(')
1246 input_line_pointer = str;
1251 if (*input_line_pointer != ')')
1253 as_bad (_("`)' required"));
1256 input_line_pointer++;
1260 return neg_p ? EXP_MOD_NEG_RELOC (mod) : EXP_MOD_RELOC (mod);
1265 input_line_pointer = tmp;
1268 /* Warn about expressions that fail to use lo8 (). */
1269 if (exp->X_op == O_constant)
1271 int x = exp->X_add_number;
1272 if (x < -255 || x > 255)
1273 as_warn (_("constant out of 8-bit range: %d"), x);
1276 return BFD_RELOC_AVR_LDI;
1279 /* Flag to pass `pm' mode between `avr_parse_cons_expression' and
1280 `avr_cons_fix_new'. */
1281 static int exp_mod_pm = 0;
1283 /* Parse special CONS expression: pm (expression)
1284 which is used for addressing to a program memory.
1285 Relocation: BFD_RELOC_AVR_16_PM. */
1288 avr_parse_cons_expression (exp, nbytes)
1296 tmp = input_line_pointer = skip_space (input_line_pointer);
1300 char *pm_name = "pm";
1301 int len = strlen (pm_name);
1303 if (strncasecmp (input_line_pointer, pm_name, len) == 0)
1305 input_line_pointer = skip_space (input_line_pointer + len);
1307 if (*input_line_pointer == '(')
1309 input_line_pointer = skip_space (input_line_pointer + 1);
1313 if (*input_line_pointer == ')')
1314 ++input_line_pointer;
1317 as_bad (_("`)' required"));
1324 input_line_pointer = tmp;
1332 avr_cons_fix_new (frag, where, nbytes, exp)
1338 if (exp_mod_pm == 0)
1341 fix_new_exp (frag, where, nbytes, exp, FALSE, BFD_RELOC_16);
1342 else if (nbytes == 4)
1343 fix_new_exp (frag, where, nbytes, exp, FALSE, BFD_RELOC_32);
1345 as_bad (_("illegal %srelocation size: %d"), "", nbytes);
1350 fix_new_exp (frag, where, nbytes, exp, FALSE, BFD_RELOC_AVR_16_PM);
1352 as_bad (_("illegal %srelocation size: %d"), "`pm' ", nbytes);