/* tc-arc.c -- Assembler for the ARC
- Copyright (C) 1994, 1995 Free Software Foundation, Inc.
+ Copyright 1994, 1995, 1997, 1999, 2000, 2001, 2002, 2003, 2004, 2005
+ Free Software Foundation, Inc.
Contributed by Doug Evans (dje@cygnus.com).
This file is part of GAS, the GNU Assembler.
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with GAS; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+ along with GAS; see the file COPYING. If not, write to the Free
+ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+ 02111-1307, USA. */
#include <stdio.h>
-#include <ctype.h>
+#include "libiberty.h"
#include "as.h"
+#include "struc-symbol.h"
+#include "safe-ctype.h"
#include "subsegs.h"
#include "opcode/arc.h"
+#include "../opcodes/arc-ext.h"
#include "elf/arc.h"
+#include "dwarf2dbg.h"
-extern int target_big_endian;
-extern int arc_get_mach PARAMS ((char *));
-
-static arc_insn arc_insert_operand PARAMS ((arc_insn insn,
- const struct arc_operand *operand,
- int mods,
- const struct arc_operand_value *reg,
- offsetT val,
- char *file, unsigned int line));
-
-static void arc_common PARAMS ((int));
-static void arc_cpu PARAMS ((int));
-/*static void arc_rename PARAMS ((int));*/
+const struct suffix_classes
+{
+ char *name;
+ int len;
+} suffixclass[] =
+{
+ { "SUFFIX_COND|SUFFIX_FLAG",23 },
+ { "SUFFIX_FLAG", 11 },
+ { "SUFFIX_COND", 11 },
+ { "SUFFIX_NONE", 11 }
+};
-static int find_mach PARAMS ((char *));
+#define MAXSUFFIXCLASS (sizeof (suffixclass) / sizeof (struct suffix_classes))
-const pseudo_typeS md_pseudo_table[] =
+const struct syntax_classes
{
- { "align", s_align_bytes, 0 }, /* Defaulting is invalid (0) */
- { "common", arc_common, 0 },
-/*{ "hword", cons, 2 }, - already exists */
- { "word", cons, 4 },
- { "xword", cons, 8 },
- { "cpu", arc_cpu, 0 },
-/*{ "rename", arc_rename, 0 },*/
- { NULL, 0, 0 },
+ char *name;
+ int len;
+ int class;
+} syntaxclass[] =
+{
+ { "SYNTAX_3OP|OP1_MUST_BE_IMM", 26, SYNTAX_3OP|OP1_MUST_BE_IMM|SYNTAX_VALID },
+ { "OP1_MUST_BE_IMM|SYNTAX_3OP", 26, OP1_MUST_BE_IMM|SYNTAX_3OP|SYNTAX_VALID },
+ { "SYNTAX_2OP|OP1_IMM_IMPLIED", 26, SYNTAX_2OP|OP1_IMM_IMPLIED|SYNTAX_VALID },
+ { "OP1_IMM_IMPLIED|SYNTAX_2OP", 26, OP1_IMM_IMPLIED|SYNTAX_2OP|SYNTAX_VALID },
+ { "SYNTAX_3OP", 10, SYNTAX_3OP|SYNTAX_VALID },
+ { "SYNTAX_2OP", 10, SYNTAX_2OP|SYNTAX_VALID }
};
-const int md_short_jump_size = 4;
-const int md_long_jump_size = 4;
-const int md_reloc_size = 12; /* Size of relocation record */
+#define MAXSYNTAXCLASS (sizeof (syntaxclass) / sizeof (struct syntax_classes))
/* This array holds the chars that always start a comment. If the
- pre-processor is disabled, these aren't very useful */
+ pre-processor is disabled, these aren't very useful. */
const char comment_chars[] = "#;";
/* This array holds the chars that only start a comment at the beginning of
.line and .file directives will appear in the pre-processed output */
/* Note that input_file.c hand checks for '#' at the beginning of the
first line of the input file. This is because the compiler outputs
- #NO_APP at the beginning of its output. */
+ #NO_APP at the beginning of its output. */
/* Also note that comments started like this one will always
- work if '/' isn't otherwise defined. */
+ work if '/' isn't otherwise defined. */
const char line_comment_chars[] = "#";
const char line_separator_chars[] = "";
-/* Chars that can be used to separate mant from exp in floating point nums */
+/* Chars that can be used to separate mant from exp in floating point nums. */
const char EXP_CHARS[] = "eE";
-/* Chars that mean this number is a floating point constant */
-/* As in 0f12.456 */
-/* or 0d1.2345e12 */
-const char FLT_CHARS[] = "rRsSfFdDxXpP";
+/* Chars that mean this number is a floating point constant
+ As in 0f12.456 or 0d1.2345e12. */
+const char FLT_CHARS[] = "rRsSfFdD";
+
+/* Byte order. */
+extern int target_big_endian;
+const char *arc_target_format = DEFAULT_TARGET_FORMAT;
+static int byte_order = DEFAULT_BYTE_ORDER;
+
+static segT arcext_section;
-/* One of bfd_mach_arc_xxx. */
-static int arc_mach_type = bfd_mach_arc_base;
+/* One of bfd_mach_arc_n. */
+static int arc_mach_type = bfd_mach_arc_6;
-/* Non-zero if the cpu type was specified on the command line. */
-static int mach_type_specified = 0;
+/* Non-zero if the cpu type has been explicitly specified. */
+static int mach_type_specified_p = 0;
/* Non-zero if opcode tables have been initialized.
- A .cpu command must appear before any instructions. */
+ A .option command must appear before any instructions. */
static int cpu_tables_init_p = 0;
-static const char *arc_condition_codes[] =
+static struct hash_control *arc_suffix_hash = NULL;
+\f
+const char *md_shortopts = "";
+
+enum options
{
- "al", "eq", "ne", "p", "n", "c", "nc", "v",
- "nv", "gt", "ge", "lt", "le", "hi", "ls", "pnz"
+ OPTION_EB = OPTION_MD_BASE,
+ OPTION_EL,
+ OPTION_ARC5,
+ OPTION_ARC6,
+ OPTION_ARC7,
+ OPTION_ARC8,
+ OPTION_ARC
};
-static struct hash_control *arc_ops_hash = NULL;
-static struct hash_control *arc_suffix_hash = NULL;
-static struct hash_control *arc_reg_hash = NULL;
-\f
-const char *md_shortopts = "m:";
struct option md_longopts[] =
{
+ { "EB", no_argument, NULL, OPTION_EB },
+ { "EL", no_argument, NULL, OPTION_EL },
+ { "marc5", no_argument, NULL, OPTION_ARC5 },
+ { "pre-v6", no_argument, NULL, OPTION_ARC5 },
+ { "marc6", no_argument, NULL, OPTION_ARC6 },
+ { "marc7", no_argument, NULL, OPTION_ARC7 },
+ { "marc8", no_argument, NULL, OPTION_ARC8 },
+ { "marc", no_argument, NULL, OPTION_ARC },
{ NULL, no_argument, NULL, 0 }
};
size_t md_longopts_size = sizeof (md_longopts);
-/*
- * md_parse_option
- *
- * Invocation line includes a switch not recognized by the base assembler.
- * See if it's a processor-specific option.
- */
+#define IS_SYMBOL_OPERAND(o) \
+ ((o) == 'b' || (o) == 'c' || (o) == 's' || (o) == 'o' || (o) == 'O')
+
+struct arc_operand_value *get_ext_suffix (char *s);
+
+/* Invocation line includes a switch not recognized by the base assembler.
+ See if it's a processor-specific option. */
int
-md_parse_option (c, arg)
- int c;
- char *arg;
+md_parse_option (int c, char *arg ATTRIBUTE_UNUSED)
{
switch (c)
{
- case 'm':
- if (strncmp (arg, "cpu=", 4) == 0)
- {
- int mach = arc_get_mach (arg + 4);
-
- if (mach != -1)
- {
- arc_mach_type = mach;
- mach_type_specified = 1;
- break;
- }
- }
- as_bad ("invalid architecture -m%s", arg);
- return 0;
-
+ case OPTION_ARC5:
+ arc_mach_type = bfd_mach_arc_5;
+ break;
+ case OPTION_ARC:
+ case OPTION_ARC6:
+ arc_mach_type = bfd_mach_arc_6;
+ break;
+ case OPTION_ARC7:
+ arc_mach_type = bfd_mach_arc_7;
+ break;
+ case OPTION_ARC8:
+ arc_mach_type = bfd_mach_arc_8;
+ break;
+ case OPTION_EB:
+ byte_order = BIG_ENDIAN;
+ arc_target_format = "elf32-bigarc";
+ break;
+ case OPTION_EL:
+ byte_order = LITTLE_ENDIAN;
+ arc_target_format = "elf32-littlearc";
+ break;
default:
return 0;
}
-
- return 1;
+ return 1;
}
void
-md_show_usage (stream)
- FILE *stream;
+md_show_usage (FILE *stream)
{
fprintf (stream, "\
-ARC options:\n\
--mcpu={base,host,graphics,audio} select cpu type\n");
+ARC Options:\n\
+ -marc[5|6|7|8] select processor variant (default arc%d)\n\
+ -EB assemble code for a big endian cpu\n\
+ -EL assemble code for a little endian cpu\n", arc_mach_type + 5);
}
/* This function is called once, at assembler startup time. It should
set up all the tables, etc. that the MD part of the assembler will need.
- Opcode selection is defered until later because we might see a .cpu
+ Opcode selection is deferred until later because we might see a .option
command. */
void
-md_begin ()
+md_begin (void)
{
- /* The endianness can be chosen "at the factory". One day we may have
- to be bi-endian. */
- target_big_endian = 0;
+ /* The endianness can be chosen "at the factory". */
+ target_big_endian = byte_order == BIG_ENDIAN;
if (!bfd_set_arch_mach (stdoutput, bfd_arch_arc, arc_mach_type))
as_warn ("could not set architecture and machine");
+
+ /* This call is necessary because we need to initialize `arc_operand_map'
+ which may be needed before we see the first insn. */
+ arc_opcode_init_tables (arc_get_opcode_mach (arc_mach_type,
+ target_big_endian));
}
/* Initialize the various opcode and operand tables.
MACH is one of bfd_mach_arc_xxx. */
static void
-init_opcode_tables (mach)
- int mach;
+init_opcode_tables (int mach)
{
- register unsigned int i;
+ int i;
char *last;
- /* Indexed by bfd_mach_arc_xxx. */
- static int cpu_type_map[] =
- {
- ARC_CPU_BASE,
- ARC_CPU_HOST,
- ARC_CPU_GRAPHICS,
- ARC_CPU_AUDIO,
- };
- if ((arc_ops_hash = hash_new ()) == NULL
- || (arc_suffix_hash = hash_new ()) == NULL
- || (arc_reg_hash = hash_new ()) == NULL)
- as_fatal ("Virtual memory exhausted");
+ if ((arc_suffix_hash = hash_new ()) == NULL)
+ as_fatal ("virtual memory exhausted");
if (!bfd_set_arch_mach (stdoutput, bfd_arch_arc, mach))
as_warn ("could not set architecture and machine");
/* This initializes a few things in arc-opc.c that we need.
This must be called before the various arc_xxx_supported fns. */
- arc_opcode_init_tables (cpu_type_map[mach]);
-
-#if 0
- for (i = 0; i < arc_opcodes_count; i++)
- hash_insert (arc_ops_hash, arc_opcodes[i].name, (PTR) (arc_opcodes + i));
-#endif
+ arc_opcode_init_tables (arc_get_opcode_mach (mach, target_big_endian));
/* Only put the first entry of each equivalently named suffix in the
table. */
last = "";
for (i = 0; i < arc_suffixes_count; i++)
{
- if (! arc_opval_supported (&arc_suffixes[i]))
- continue;
if (strcmp (arc_suffixes[i].name, last) != 0)
- hash_insert (arc_suffix_hash, arc_suffixes[i].name, (PTR) (arc_suffixes + i));
+ hash_insert (arc_suffix_hash, arc_suffixes[i].name, (void *) (arc_suffixes + i));
last = arc_suffixes[i].name;
}
- /* ??? This is the simple version. See tc-arm.c for something snazzier. */
+ /* Since registers don't have a prefix, we put them in the symbol table so
+ they can't be used as symbols. This also simplifies argument parsing as
+ we can let gas parse registers for us. The recorded register number is
+ the address of the register's entry in arc_reg_names.
+
+ If the register name is already in the table, then the existing
+ definition is assumed to be from an .ExtCoreRegister pseudo-op. */
+
for (i = 0; i < arc_reg_names_count; i++)
{
- if (! arc_opval_supported (&arc_reg_names[i]))
+ if (symbol_find (arc_reg_names[i].name))
continue;
- hash_insert (arc_reg_hash, arc_reg_names[i].name, (PTR) (arc_reg_names + i));
+ /* Use symbol_create here instead of symbol_new so we don't try to
+ output registers into the object file's symbol table. */
+ symbol_table_insert (symbol_create (arc_reg_names[i].name,
+ reg_section,
+ (int) &arc_reg_names[i],
+ &zero_address_frag));
}
- /* Tell `s_cpu' it's too late. */
+ /* Tell `.option' it's too late. */
cpu_tables_init_p = 1;
}
\f
If REG is non-NULL, it is a register number and ignore VAL. */
static arc_insn
-arc_insert_operand (insn, operand, mods, reg, val, file, line)
- arc_insn insn;
- const struct arc_operand *operand;
- int mods;
- const struct arc_operand_value *reg;
- offsetT val;
- char *file;
- unsigned int line;
+arc_insert_operand (arc_insn insn,
+ const struct arc_operand *operand,
+ int mods,
+ const struct arc_operand_value *reg,
+ offsetT val,
+ char *file,
+ unsigned int line)
{
if (operand->bits != 32)
{
test = val;
if (test < (offsetT) min || test > (offsetT) max)
- {
- const char *err =
- "operand out of range (%s not between %ld and %ld)";
- char buf[100];
-
- sprint_value (buf, test);
- if (file == (char *) NULL)
- as_warn (err, buf, min, max);
- else
- as_warn_where (file, line, err, buf, min, max);
- }
+ as_warn_value_out_of_range (_("operand"), test, (offsetT) min, (offsetT) max, file, line);
}
if (operand->insert)
struct arc_fixup
{
- expressionS exp;
- /* index into `arc_operands' */
+ /* index into `arc_operands' */
int opindex;
+ expressionS exp;
};
-#define MAX_INSN_FIXUPS 5
+#define MAX_FIXUPS 5
-/* This routine is called for each instruction to be assembled. */
+#define MAX_SUFFIXES 5
-void
-md_assemble (str)
- char *str;
+/* Compute the reloc type of an expression.
+ The possibly modified expression is stored in EXPNEW.
+
+ This is used to convert the expressions generated by the %-op's into
+ the appropriate operand type. It is called for both data in instructions
+ (operands) and data outside instructions (variables, debugging info, etc.).
+
+ Currently supported %-ops:
+
+ %st(symbol): represented as "symbol >> 2"
+ "st" is short for STatus as in the status register (pc)
+
+ DEFAULT_TYPE is the type to use if no special processing is required.
+
+ DATA_P is non-zero for data or limm values, zero for insn operands.
+ Remember that the opcode "insertion fns" cannot be used on data, they're
+ only for inserting operands into insns. They also can't be used for limm
+ values as the insertion routines don't handle limm values. When called for
+ insns we return fudged reloc types (real_value - BFD_RELOC_UNUSED). When
+ called for data or limm values we use real reloc types. */
+
+static int
+get_arc_exp_reloc_type (int data_p,
+ int default_type,
+ expressionS *exp,
+ expressionS *expnew)
{
- const struct arc_opcode *opcode,*opcode_end;
- char *start;
- arc_insn insn;
- bfd_reloc_code_real_type reloc;
- static int init_tables_p = 0;
+ /* If the expression is "symbol >> 2" we must change it to just "symbol",
+ as fix_new_exp can't handle it. Similarly for (symbol - symbol) >> 2.
+ That's ok though. What's really going on here is that we're using
+ ">> 2" as a special syntax for specifying BFD_RELOC_ARC_B26. */
+
+ if (exp->X_op == O_right_shift
+ && exp->X_op_symbol != NULL
+ && exp->X_op_symbol->sy_value.X_op == O_constant
+ && exp->X_op_symbol->sy_value.X_add_number == 2
+ && exp->X_add_number == 0)
+ {
+ if (exp->X_add_symbol != NULL
+ && (exp->X_add_symbol->sy_value.X_op == O_constant
+ || exp->X_add_symbol->sy_value.X_op == O_symbol))
+ {
+ *expnew = *exp;
+ expnew->X_op = O_symbol;
+ expnew->X_op_symbol = NULL;
+ return data_p ? BFD_RELOC_ARC_B26 : arc_operand_map['J'];
+ }
+ else if (exp->X_add_symbol != NULL
+ && exp->X_add_symbol->sy_value.X_op == O_subtract)
+ {
+ *expnew = exp->X_add_symbol->sy_value;
+ return data_p ? BFD_RELOC_ARC_B26 : arc_operand_map['J'];
+ }
+ }
- /* Opcode table initialization is deferred until here because we have to
- wait for a possible .cpu command. */
- if (!init_tables_p)
+ *expnew = *exp;
+ return default_type;
+}
+\f
+static int
+arc_set_ext_seg (void)
+{
+ if (!arcext_section)
{
- init_opcode_tables (arc_mach_type);
- init_tables_p = 1;
+ arcext_section = subseg_new (".arcextmap", 0);
+ bfd_set_section_flags (stdoutput, arcext_section,
+ SEC_READONLY | SEC_HAS_CONTENTS);
}
+ else
+ subseg_set (arcext_section, 0);
+ return 1;
+}
- /* Skip leading white space. */
- while (isspace (*str))
- str++;
+static void
+arc_extoper (int opertype)
+{
+ char *name;
+ char *mode;
+ char c;
+ char *p;
+ int imode = 0;
+ int number;
+ struct arc_ext_operand_value *ext_oper;
+ symbolS *symbolP;
- /* The instructions are sorted by the first letter. Scan the opcode table
- until we find the right one. */
- opcode_end = arc_opcodes + arc_opcodes_count;
- for (opcode = arc_opcodes; opcode < opcode_end; opcode++)
- if (*opcode->syntax == *str)
- break;
- if (opcode == opcode_end)
+ segT old_sec;
+ int old_subsec;
+
+ name = input_line_pointer;
+ c = get_symbol_end ();
+ name = xstrdup (name);
+
+ p = name;
+ while (*p)
{
- as_bad ("bad instruction `%s'", str);
- return;
+ *p = TOLOWER (*p);
+ p++;
}
- /* Keep looking until we find a match. If we haven't found a match, and the
- first character no longer matches, we needn't look any further. */
+ /* just after name is now '\0' */
+ p = input_line_pointer;
+ *p = c;
+ SKIP_WHITESPACE ();
- start = str;
- for ( ; opcode < opcode_end && *opcode->syntax == *start; ++opcode)
+ if (*input_line_pointer != ',')
{
- int past_opcode_p;
- char *syn;
- struct arc_fixup fixups[MAX_INSN_FIXUPS];
- int fc,limm_reloc_p;
-
- /* Is this opcode supported by the selected cpu? */
- if (! arc_opcode_supported (opcode))
- continue;
+ as_bad ("expected comma after operand name");
+ ignore_rest_of_line ();
+ free (name);
+ return;
+ }
- /* Scan the syntax string. If it doesn't match, try the next one. */
+ input_line_pointer++; /* skip ',' */
+ number = get_absolute_expression ();
- arc_opcode_init_insert ();
- insn = opcode->value;
- reloc = BFD_RELOC_NONE;
- fc = 0;
- past_opcode_p = 0;
+ if (number < 0)
+ {
+ as_bad ("negative operand number %d", number);
+ ignore_rest_of_line ();
+ free (name);
+ return;
+ }
- /* Used as a sanity check. If we need a limm reloc, make sure we ask
- for an extra 4 bytes from frag_more. */
- limm_reloc_p = 0;
+ if (opertype)
+ {
+ SKIP_WHITESPACE ();
- /* We don't check for (*str != '\0') here because we want to parse
- any trailing fake arguments in the syntax string. */
- for (str = start, syn = opcode->syntax; *syn != '\0'; )
+ if (*input_line_pointer != ',')
{
- int mods;
- const struct arc_operand *operand;
+ as_bad ("expected comma after register-number");
+ ignore_rest_of_line ();
+ free (name);
+ return;
+ }
- /* Non operand chars must match exactly. */
- if (*syn != '%' || *++syn == '%')
+ input_line_pointer++; /* skip ',' */
+ mode = input_line_pointer;
+
+ if (!strncmp (mode, "r|w", 3))
+ {
+ imode = 0;
+ input_line_pointer += 3;
+ }
+ else
+ {
+ if (!strncmp (mode, "r", 1))
+ {
+ imode = ARC_REGISTER_READONLY;
+ input_line_pointer += 1;
+ }
+ else
{
- /* Handle '+' specially as we want to allow "ld r0,[sp-4]". */
- if (*syn == '+' && *str == '-')
+ if (strncmp (mode, "w", 1))
{
- /* Skip over syn's +, but leave str's - alone.
- That makes the case identical to "ld r0,[sp+-4]". */
- ++syn;
+ as_bad ("invalid mode");
+ ignore_rest_of_line ();
+ free (name);
+ return;
}
- else if (*str != *syn)
- break;
else
{
- if (*syn == ' ')
- past_opcode_p = 1;
- ++syn;
- ++str;
+ imode = ARC_REGISTER_WRITEONLY;
+ input_line_pointer += 1;
}
- continue;
}
-
- /* We have an operand. Pick out any modifiers. */
- mods = 0;
- while (ARC_MOD_P (arc_operands[arc_operand_map[*syn]].flags))
+ }
+ SKIP_WHITESPACE ();
+ if (1 == opertype)
+ {
+ if (*input_line_pointer != ',')
{
- mods |= arc_operands[arc_operand_map[*syn]].flags & ARC_MOD_BITS;
- ++syn;
+ as_bad ("expected comma after register-mode");
+ ignore_rest_of_line ();
+ free (name);
+ return;
}
- operand = arc_operands + arc_operand_map[*syn];
- if (operand->fmt == 0)
- as_fatal ("unknown syntax format character `%c'", *syn);
- if (operand->flags & ARC_OPERAND_FAKE)
+ input_line_pointer++; /* skip ',' */
+
+ if (!strncmp (input_line_pointer, "cannot_shortcut", 15))
{
- const char *errmsg = NULL;
- if (operand->insert)
- {
- insn = (*operand->insert) (insn, operand, mods, NULL, 0, &errmsg);
- /* If we get an error, go on to try the next insn. */
- if (errmsg)
- break;
- }
- ++syn;
+ imode |= arc_get_noshortcut_flag ();
+ input_line_pointer += 15;
}
- /* Are we finished with suffixes? */
- else if (!past_opcode_p)
+ else
{
- int found;
- char c;
- char *s,*t;
- const struct arc_operand_value *suf,*suffix,*suffix_end;
-
- if (!(operand->flags & ARC_OPERAND_SUFFIX))
- abort ();
-
- /* If we're at a space in the input string, we want to skip the
- remaining suffixes. There may be some fake ones though, so
- just go on to try the next one. */
- if (*str == ' ')
- {
- ++syn;
- continue;
- }
-
- s = str;
- if (mods & ARC_MOD_DOT)
+ if (strncmp (input_line_pointer, "can_shortcut", 12))
{
- if (*s != '.')
- break;
- ++s;
+ as_bad ("shortcut designator invalid");
+ ignore_rest_of_line ();
+ free (name);
+ return;
}
else
{
- /* This can happen in "b.nd foo" and we're currently looking
- for "%q" (ie: a condition code suffix). */
- if (*s == '.')
- {
- ++syn;
- continue;
- }
+ input_line_pointer += 12;
}
+ }
+ }
+ }
- /* Pick the suffix out and look it up via the hash table. */
- for (t = s; *t && isalpha (*t); ++t)
- continue;
- c = *t;
- *t = '\0';
- suf = hash_find (arc_suffix_hash, s);
- *t = c;
- if (!suf)
- {
- /* This can happen in "blle foo" and we're currently using
- the template "b%q%.n %j". The "bl" insn occurs later in
- the table so "lle" isn't an illegal suffix. */
- break;
- }
+ if ((opertype == 1) && number > 60)
+ {
+ as_bad ("core register value (%d) too large", number);
+ ignore_rest_of_line ();
+ free (name);
+ return;
+ }
- /* Is it the right type? Note that the same character is used
- several times, so we have to examine all of them. This is
- relatively efficient as equivalent entries are kept
- together. If it's not the right type, don't increment `str'
- so we try the next one in the series. */
- found = 0;
- suffix_end = arc_suffixes + arc_suffixes_count;
- for (suffix = suf;
- suffix < suffix_end && strcmp (suffix->name, suf->name) == 0;
- suffix++)
- {
- if (arc_operands[suffix->type].fmt == *syn)
- {
- /* Insert the suffix's value into the insn. */
- if (operand->insert)
- insn = (*operand->insert) (insn, operand,
- mods, NULL, suffix->value,
- NULL);
- else
- insn |= suffix->value << operand->shift;
-
- str = t;
- found = 1;
- break;
- }
- }
- ++syn;
- if (!found)
- /* There's nothing to do except, go on to try the next one.
- ??? This test can be deleted when we're done. */
- ;
- }
+ if ((opertype == 0) && number > 31)
+ {
+ as_bad ("condition code value (%d) too large", number);
+ ignore_rest_of_line ();
+ free (name);
+ return;
+ }
+
+ ext_oper = xmalloc (sizeof (struct arc_ext_operand_value));
+
+ if (opertype)
+ {
+ /* If the symbol already exists, point it at the new definition. */
+ if ((symbolP = symbol_find (name)))
+ {
+ if (S_GET_SEGMENT (symbolP) == reg_section)
+ S_SET_VALUE (symbolP, (int) &ext_oper->operand);
else
- /* This is either a register or an expression of some kind. */
{
- char c;
- char *hold;
- const struct arc_operand_value *reg;
- long value;
- expressionS ex;
+ as_bad ("attempt to override symbol: %s", name);
+ ignore_rest_of_line ();
+ free (name);
+ free (ext_oper);
+ return;
+ }
+ }
+ else
+ {
+ /* If its not there, add it. */
+ symbol_table_insert (symbol_create (name, reg_section,
+ (int) &ext_oper->operand, &zero_address_frag));
+ }
+ }
- if (operand->flags & ARC_OPERAND_SUFFIX)
- abort ();
+ ext_oper->operand.name = name;
+ ext_oper->operand.value = number;
+ ext_oper->operand.type = arc_operand_type (opertype);
+ ext_oper->operand.flags = imode;
- /* Is there anything left to parse?
- We don't check for this at the top because we want to parse
- any trailing fake arguments in the syntax string. */
- if (*str == '\0')
- break;
+ ext_oper->next = arc_ext_operands;
+ arc_ext_operands = ext_oper;
- /* Is this a syntax character? Eg: is there a '[' present when
- there shouldn't be? */
- if (!isalnum (*str)
- /* '.' as in ".LLC0" */
- && *str != '.'
- /* '_' as in "_print" */
- && *str != '_'
- /* '-' as in "[fp-4]" */
- && *str != '-')
- break;
+ /* OK, now that we know what this operand is, put a description in
+ the arc extension section of the output file. */
- /* Is it a register? */
- value = 0;
- hold = str;
- while (*str && (isalnum (*str) || *str == '_'))
- ++str;
- c = *str;
- *str = '\0';
- reg = hash_find (arc_reg_hash, hold);
- *str = c;
- if (!reg)
- {
- /* Restore `str', it wasn't a register. */
- str = hold;
-
- /* Gather the operand. */
- hold = input_line_pointer;
- input_line_pointer = str;
- expression (&ex);
- str = input_line_pointer;
- input_line_pointer = hold;
-
- if (ex.X_op == O_illegal)
- as_bad ("illegal operand");
- else if (ex.X_op == O_absent)
- as_bad ("missing operand");
- else if (ex.X_op == O_constant)
- {
- value = ex.X_add_number;
- }
- else
- {
- /* We need to generate a fixup for this expression.
- If this is a register constant (IE: one whose register
- value gets stored as 61-63) then this must be a limm.
- We don't support shimm relocs. */
- if (fc >= MAX_INSN_FIXUPS)
- as_fatal ("too many fixups");
- fixups[fc].exp = ex;
-
- /* ??? This bit could use some cleaning up. Referencing
- the format chars like this goes against style. */
-#define IS_REG_OPERAND(o) ((o) == 'a' || (o) == 'b' || (o) == 'c')
- if (IS_REG_OPERAND (*syn))
- {
- const char *junk;
- fixups[fc].opindex = arc_operand_map['L'];
- limm_reloc_p = 1;
- /* Tell insert_reg we need a limm. This is needed
- because the value at this point is zero, a shimm.
- ??? Hack city. */
- (*arc_operands[arc_operand_map['Q']].insert)
- (insn, operand, mods, reg, 0L, &junk);
- }
- else
- fixups[fc].opindex = arc_operand_map[*syn];
- ++fc;
- value = 0;
- }
- }
+ old_sec = now_seg;
+ old_subsec = now_subseg;
- /* Insert the register or expression into the instruction. */
- if (operand->insert)
- {
- const char *errmsg = NULL;
- insn = (*operand->insert) (insn, operand, mods,
- reg, (long) value, &errmsg);
-#if 0
- if (errmsg != (const char *) NULL)
- as_warn (errmsg);
-#endif
- /* FIXME: We want to try shimm insns for limm ones. But if
- the constant won't fit, we must go on to try the next
- possibility. Where do we issue warnings for constants
- that are too big then? At present, we'll flag the insn
- as unrecognizable! Maybe have the "bad instruction"
- error message include our `errmsg'? */
- if (errmsg != (const char *) NULL)
- break;
- }
- else
- insn |= (value & ((1 << operand->bits) - 1)) << operand->shift;
-
- ++syn;
- }
- }
-
- if (*syn == '\0')
- {
- int i;
- char *f;
- long limm;
-
- /* We've found a matching insn.
- ??? For the moment we assume a valid `str' can only contain blanks
- now. IE: We needn't try again with a longer version of the
- insn. */
-
- while (isspace (*str))
- ++str;
-
- if (*str != '\0')
- as_bad ("junk at end of line: `%s'", str);
-
- /* Write out the instruction.
- It is important to fetch enough space in one call to `frag_more'.
- We use (f - frag_now->fr_literal) to compute where we are and we
- don't want frag_now to change between calls. */
- if (arc_opcode_limm_p (&limm))
- {
- f = frag_more (8);
- md_number_to_chars (f, insn, 4);
- md_number_to_chars (f + 4, limm, 4);
- }
- else if (limm_reloc_p)
- {
- /* We need a limm reloc, but the tables think we don't. */
- abort ();
- }
- else
- {
- f = frag_more (4);
- md_number_to_chars (f, insn, 4);
- }
+ arc_set_ext_seg ();
- /* Create any fixups. At this point we do not use a
- bfd_reloc_code_real_type, but instead just use the operand index.
- This lets us easily handle fixups for any operand type, although
- that is admittedly not a very exciting feature. We pick a BFD
- reloc type in md_apply_fix. */
- for (i = 0; i < fc; i++)
- {
- const struct arc_operand *operand;
-
- operand = &arc_operands[fixups[i].opindex];
- fix_new_exp (frag_now,
- ((f - frag_now->fr_literal)
- + (operand->fmt == 'L' ? 4 : 0)), 4,
- &fixups[i].exp,
- (operand->flags & ARC_OPERAND_RELATIVE) != 0,
- ((bfd_reloc_code_real_type)
- (fixups[i].opindex + (int) BFD_RELOC_UNUSED)));
- }
+ switch (opertype)
+ {
+ case 0:
+ p = frag_more (1);
+ *p = 3 + strlen (name) + 1;
+ p = frag_more (1);
+ *p = EXT_COND_CODE;
+ p = frag_more (1);
+ *p = number;
+ p = frag_more (strlen (name) + 1);
+ strcpy (p, name);
+ break;
+ case 1:
+ p = frag_more (1);
+ *p = 3 + strlen (name) + 1;
+ p = frag_more (1);
+ *p = EXT_CORE_REGISTER;
+ p = frag_more (1);
+ *p = number;
+ p = frag_more (strlen (name) + 1);
+ strcpy (p, name);
+ break;
+ case 2:
+ p = frag_more (1);
+ *p = 6 + strlen (name) + 1;
+ p = frag_more (1);
+ *p = EXT_AUX_REGISTER;
+ p = frag_more (1);
+ *p = number >> 24 & 0xff;
+ p = frag_more (1);
+ *p = number >> 16 & 0xff;
+ p = frag_more (1);
+ *p = number >> 8 & 0xff;
+ p = frag_more (1);
+ *p = number & 0xff;
+ p = frag_more (strlen (name) + 1);
+ strcpy (p, name);
+ break;
+ default:
+ as_bad ("invalid opertype");
+ ignore_rest_of_line ();
+ free (name);
+ return;
+ break;
+ }
- /* All done. */
- return;
- }
+ subseg_set (old_sec, old_subsec);
- /* Try the next entry. */
- }
+ /* Enter all registers into the symbol table. */
- as_bad ("bad instruction `%s'", start);
+ demand_empty_rest_of_line ();
}
-\f
+
static void
-arc_common (ignore)
- int ignore;
+arc_extinst (int ignore ATTRIBUTE_UNUSED)
{
+ char syntax[129];
char *name;
- char c;
char *p;
- int temp, size;
- symbolS *symbolP;
+ char c;
+ int suffixcode = -1;
+ int opcode, subopcode;
+ int i;
+ int class = 0;
+ int name_len;
+ struct arc_opcode *ext_op;
+
+ segT old_sec;
+ int old_subsec;
name = input_line_pointer;
c = get_symbol_end ();
- /* just after name is now '\0' */
+ name = xstrdup (name);
+ strcpy (syntax, name);
+ name_len = strlen (name);
+
+ /* just after name is now '\0' */
p = input_line_pointer;
*p = c;
+
SKIP_WHITESPACE ();
+
if (*input_line_pointer != ',')
{
- as_bad ("expected comma after symbol-name");
+ as_bad ("expected comma after operand name");
ignore_rest_of_line ();
return;
}
- input_line_pointer++; /* skip ',' */
- if ((temp = get_absolute_expression ()) < 0)
+
+ input_line_pointer++; /* skip ',' */
+ opcode = get_absolute_expression ();
+
+ SKIP_WHITESPACE ();
+
+ if (*input_line_pointer != ',')
{
- as_bad (".COMMon length (%d.) <0! Ignored.", temp);
+ as_bad ("expected comma after opcode");
ignore_rest_of_line ();
return;
}
- size = temp;
- *p = 0;
- symbolP = symbol_find_or_make (name);
- *p = c;
- if (S_IS_DEFINED (symbolP))
+
+ input_line_pointer++; /* skip ',' */
+ subopcode = get_absolute_expression ();
+
+ if (subopcode < 0)
{
- as_bad ("ignoring attempt to re-define symbol");
+ as_bad ("negative subopcode %d", subopcode);
ignore_rest_of_line ();
return;
}
- if (S_GET_VALUE (symbolP) != 0)
+
+ if (subopcode)
{
- if (S_GET_VALUE (symbolP) != size)
+ if (3 != opcode)
{
- as_warn ("Length of .comm \"%s\" is already %ld. Not changed to %d.",
- S_GET_NAME (symbolP), (long) S_GET_VALUE (symbolP), size);
+ as_bad ("subcode value found when opcode not equal 0x03");
+ ignore_rest_of_line ();
+ return;
+ }
+ else
+ {
+ if (subopcode < 0x09 || subopcode == 0x3f)
+ {
+ as_bad ("invalid subopcode %d", subopcode);
+ ignore_rest_of_line ();
+ return;
+ }
}
}
- else
- {
-#ifndef OBJ_ELF
- S_SET_VALUE (symbolP, (valueT) size);
- S_SET_EXTERNAL (symbolP);
-#endif
- }
- assert (symbolP->sy_frag == &zero_address_frag);
+
+ SKIP_WHITESPACE ();
+
if (*input_line_pointer != ',')
{
- as_bad ("expected comma after common length");
+ as_bad ("expected comma after subopcode");
ignore_rest_of_line ();
return;
}
- input_line_pointer++;
- SKIP_WHITESPACE ();
- if (*input_line_pointer != '"')
+
+ input_line_pointer++; /* skip ',' */
+
+ for (i = 0; i < (int) MAXSUFFIXCLASS; i++)
{
- temp = get_absolute_expression ();
-#ifndef OBJ_ELF
- if (temp > max_alignment)
- {
- temp = max_alignment;
- as_warn ("Common alignment too large: %d. assumed", temp);
- }
-#endif
- if (temp < 0)
- {
- temp = 0;
- as_warn ("Common alignment negative; 0 assumed");
- }
-#ifdef OBJ_ELF
- if (symbolP->local)
- {
- segT old_sec;
- int old_subsec;
- char *p;
- int align;
-
- allocate_bss:
- old_sec = now_seg;
- old_subsec = now_subseg;
- align = temp;
- record_alignment (bss_section, align);
- subseg_set (bss_section, 0);
- if (align)
- frag_align (align, 0);
- if (S_GET_SEGMENT (symbolP) == bss_section)
- symbolP->sy_frag->fr_symbol = 0;
- symbolP->sy_frag = frag_now;
- p = frag_var (rs_org, 1, 1, (relax_substateT) 0, symbolP, size,
- (char *) 0);
- *p = 0;
- S_SET_SEGMENT (symbolP, bss_section);
- S_CLEAR_EXTERNAL (symbolP);
- subseg_set (old_sec, old_subsec);
- }
- else
-#endif
+ if (!strncmp (suffixclass[i].name,input_line_pointer, suffixclass[i].len))
{
- allocate_common:
- S_SET_VALUE (symbolP, (valueT) size);
-#ifdef OBJ_ELF
- S_SET_ALIGN (symbolP, temp);
-#endif
- S_SET_EXTERNAL (symbolP);
- /* should be common, but this is how gas does it for now */
- S_SET_SEGMENT (symbolP, bfd_und_section_ptr);
+ suffixcode = i;
+ input_line_pointer += suffixclass[i].len;
+ break;
}
}
- else
+
+ if (-1 == suffixcode)
{
- input_line_pointer++;
- /* @@ Some use the dot, some don't. Can we get some consistency?? */
- if (*input_line_pointer == '.')
- input_line_pointer++;
- /* @@ Some say data, some say bss. */
- if (strncmp (input_line_pointer, "bss\"", 4)
- && strncmp (input_line_pointer, "data\"", 5))
+ as_bad ("invalid suffix class");
+ ignore_rest_of_line ();
+ return;
+ }
+
+ SKIP_WHITESPACE ();
+
+ if (*input_line_pointer != ',')
+ {
+ as_bad ("expected comma after suffix class");
+ ignore_rest_of_line ();
+ return;
+ }
+
+ input_line_pointer++; /* skip ',' */
+
+ for (i = 0; i < (int) MAXSYNTAXCLASS; i++)
+ {
+ if (!strncmp (syntaxclass[i].name,input_line_pointer, syntaxclass[i].len))
{
- while (*--input_line_pointer != '"')
- ;
- input_line_pointer--;
- goto bad_common_segment;
+ class = syntaxclass[i].class;
+ input_line_pointer += syntaxclass[i].len;
+ break;
}
- while (*input_line_pointer++ != '"')
- ;
- goto allocate_common;
}
- demand_empty_rest_of_line ();
- return;
- {
- bad_common_segment:
- p = input_line_pointer;
- while (*p && *p != '\n')
- p++;
- c = *p;
- *p = '\0';
- as_bad ("bad .common segment %s", input_line_pointer + 1);
- *p = c;
- input_line_pointer = p;
- ignore_rest_of_line ();
- return;
- }
-}
+ if (0 == (SYNTAX_VALID & class))
+ {
+ as_bad ("invalid syntax class");
+ ignore_rest_of_line ();
+ return;
+ }
-/* Select the cpu we're assembling for. */
+ if ((0x3 == opcode) & (class & SYNTAX_3OP))
+ {
+ as_bad ("opcode 0x3 and SYNTAX_3OP invalid");
+ ignore_rest_of_line ();
+ return;
+ }
+
+ switch (suffixcode)
+ {
+ case 0:
+ strcat (syntax, "%.q%.f ");
+ break;
+ case 1:
+ strcat (syntax, "%.f ");
+ break;
+ case 2:
+ strcat (syntax, "%.q ");
+ break;
+ case 3:
+ strcat (syntax, " ");
+ break;
+ default:
+ as_bad ("unknown suffix class");
+ ignore_rest_of_line ();
+ return;
+ break;
+ };
+
+ strcat (syntax, ((opcode == 0x3) ? "%a,%b" : ((class & SYNTAX_3OP) ? "%a,%b,%c" : "%b,%c")));
+ if (suffixcode < 2)
+ strcat (syntax, "%F");
+ strcat (syntax, "%S%L");
+
+ ext_op = xmalloc (sizeof (struct arc_opcode));
+ ext_op->syntax = xstrdup (syntax);
+
+ ext_op->mask = I (-1) | ((0x3 == opcode) ? C (-1) : 0);
+ ext_op->value = I (opcode) | ((0x3 == opcode) ? C (subopcode) : 0);
+ ext_op->flags = class;
+ ext_op->next_asm = arc_ext_opcodes;
+ ext_op->next_dis = arc_ext_opcodes;
+ arc_ext_opcodes = ext_op;
+
+ /* OK, now that we know what this inst is, put a description in the
+ arc extension section of the output file. */
+
+ old_sec = now_seg;
+ old_subsec = now_subseg;
+
+ arc_set_ext_seg ();
+
+ p = frag_more (1);
+ *p = 5 + name_len + 1;
+ p = frag_more (1);
+ *p = EXT_INSTRUCTION;
+ p = frag_more (1);
+ *p = opcode;
+ p = frag_more (1);
+ *p = subopcode;
+ p = frag_more (1);
+ *p = (class & (OP1_MUST_BE_IMM | OP1_IMM_IMPLIED) ? IGNORE_FIRST_OPD : 0);
+ p = frag_more (name_len);
+ strncpy (p, syntax, name_len);
+ p = frag_more (1);
+ *p = '\0';
+
+ subseg_set (old_sec, old_subsec);
+
+ demand_empty_rest_of_line ();
+}
static void
-arc_cpu (ignore)
- int ignore;
+arc_common (int localScope)
{
- int mach;
+ char *name;
char c;
- char *cpu;
- static int seen_p = 0;
+ char *p;
+ int align, size;
+ symbolS *symbolP;
+
+ name = input_line_pointer;
+ c = get_symbol_end ();
+ /* just after name is now '\0' */
+ p = input_line_pointer;
+ *p = c;
+ SKIP_WHITESPACE ();
- /* Allow only one .cpu. */
- if (seen_p)
+ if (*input_line_pointer != ',')
{
- as_bad ("only one .cpu command allowed");
+ as_bad ("expected comma after symbol name");
ignore_rest_of_line ();
return;
}
- seen_p = 1;
- /* If an instruction has already been seen, it's too late. */
- if (cpu_tables_init_p)
+ input_line_pointer++; /* skip ',' */
+ size = get_absolute_expression ();
+
+ if (size < 0)
{
- as_bad (".cpu command must appear before any instructions");
+ as_bad ("negative symbol length");
ignore_rest_of_line ();
return;
}
- cpu = input_line_pointer;
- c = get_symbol_end ();
- mach = arc_get_mach (cpu);
- *input_line_pointer = c;
- if (mach == -1)
- goto bad_cpu;
+ *p = 0;
+ symbolP = symbol_find_or_make (name);
+ *p = c;
- /* Kind of overkill but what the heck. */
- demand_empty_rest_of_line ();
+ if (S_IS_DEFINED (symbolP) && ! S_IS_COMMON (symbolP))
+ {
+ as_bad ("ignoring attempt to re-define symbol");
+ ignore_rest_of_line ();
+ return;
+ }
+ if (((int) S_GET_VALUE (symbolP) != 0) \
+ && ((int) S_GET_VALUE (symbolP) != size))
+ {
+ as_warn ("length of symbol \"%s\" already %ld, ignoring %d",
+ S_GET_NAME (symbolP), (long) S_GET_VALUE (symbolP), size);
+ }
+ assert (symbolP->sy_frag == &zero_address_frag);
+
+ /* Now parse the alignment field. This field is optional for
+ local and global symbols. Default alignment is zero. */
+ if (*input_line_pointer == ',')
+ {
+ input_line_pointer++;
+ align = get_absolute_expression ();
+ if (align < 0)
+ {
+ align = 0;
+ as_warn ("assuming symbol alignment of zero");
+ }
+ }
+ else
+ align = 0;
- /* The cpu may have been selected on the command line.
- The choices must match. */
- if (mach_type_specified && mach != arc_mach_type)
- as_bad (".cpu conflicts with -mcpu flag");
+ if (localScope != 0)
+ {
+ segT old_sec;
+ int old_subsec;
+ char *pfrag;
+
+ old_sec = now_seg;
+ old_subsec = now_subseg;
+ record_alignment (bss_section, align);
+ subseg_set (bss_section, 0); /* ??? subseg_set (bss_section, 1); ??? */
+
+ if (align)
+ /* Do alignment. */
+ frag_align (align, 0, 0);
+
+ /* Detach from old frag. */
+ if (S_GET_SEGMENT (symbolP) == bss_section)
+ symbolP->sy_frag->fr_symbol = NULL;
+
+ symbolP->sy_frag = frag_now;
+ pfrag = frag_var (rs_org, 1, 1, (relax_substateT) 0, symbolP,
+ (offsetT) size, (char *) 0);
+ *pfrag = 0;
+
+ S_SET_SIZE (symbolP, size);
+ S_SET_SEGMENT (symbolP, bss_section);
+ S_CLEAR_EXTERNAL (symbolP);
+ symbolP->local = 1;
+ subseg_set (old_sec, old_subsec);
+ }
else
{
- arc_mach_type = mach;
- if (!bfd_set_arch_mach (stdoutput, bfd_arch_arc, mach))
- as_warn ("could not set architecture and machine");
+ S_SET_VALUE (symbolP, (valueT) size);
+ S_SET_ALIGN (symbolP, align);
+ S_SET_EXTERNAL (symbolP);
+ S_SET_SEGMENT (symbolP, bfd_com_section_ptr);
}
- return;
- bad_cpu:
- as_bad ("bad .cpu op");
- ignore_rest_of_line ();
-}
+ symbolP->bsym->flags |= BSF_OBJECT;
-#if 0
-/* The .rename pseudo-op. This is used by gcc to implement
- -mmangle-cpu-libgcc. */
+ demand_empty_rest_of_line ();
+}
+\f
+/* Select the cpu we're assembling for. */
static void
-arc_rename (ignore)
- int ignore;
+arc_option (int ignore ATTRIBUTE_UNUSED)
{
- char *name,*new;
+ extern int arc_get_mach (char *);
+ int mach;
char c;
- symbolS *sym;
- int len;
+ char *cpu;
- name = input_line_pointer;
+ cpu = input_line_pointer;
c = get_symbol_end ();
- sym = symbol_find_or_make (name);
+ mach = arc_get_mach (cpu);
*input_line_pointer = c;
- if (*input_line_pointer != ',')
+ /* If an instruction has already been seen, it's too late. */
+ if (cpu_tables_init_p)
{
- as_bad ("missing rename string");
+ as_bad ("\".option\" directive must appear before any instructions");
ignore_rest_of_line ();
return;
}
- ++input_line_pointer;
- SKIP_WHITESPACE ();
- name = input_line_pointer;
- c = get_symbol_end ();
- if (*name == '\0')
+ if (mach == -1)
+ goto bad_cpu;
+
+ if (mach_type_specified_p && mach != arc_mach_type)
{
- *input_line_pointer = c;
- as_bad ("invalid symbol to rename to");
+ as_bad ("\".option\" directive conflicts with initial definition");
ignore_rest_of_line ();
return;
}
- new = (char *) xmalloc (strlen (name) + 1);
- strcpy (new, name);
- *input_line_pointer = c;
- sym->sy_tc.real_name = new;
-
+ else
+ {
+ /* The cpu may have been selected on the command line. */
+ if (mach != arc_mach_type)
+ as_warn ("\".option\" directive overrides command-line (default) value");
+ arc_mach_type = mach;
+ if (!bfd_set_arch_mach (stdoutput, bfd_arch_arc, mach))
+ as_fatal ("could not set architecture and machine");
+ mach_type_specified_p = 1;
+ }
demand_empty_rest_of_line ();
+ return;
+
+ bad_cpu:
+ as_bad ("invalid identifier for \".option\"");
+ ignore_rest_of_line ();
}
-#endif
\f
-/* Turn a string in input_line_pointer into a floating point constant of type
- type, and store the appropriate bytes in *litP. The number of LITTLENUMS
- emitted is stored in *sizeP.
- An error message is returned, or NULL on OK. */
+/* Turn a string in input_line_pointer into a floating point constant
+ of type TYPE, and store the appropriate bytes in *LITP. The number
+ of LITTLENUMS emitted is stored in *SIZEP. An error message is
+ returned, or NULL on OK. */
-/* Equal to MAX_PRECISION in atof-ieee.c */
+/* Equal to MAX_PRECISION in atof-ieee.c */
#define MAX_LITTLENUMS 6
char *
-md_atof (type, litP, sizeP)
- char type;
- char *litP;
- int *sizeP;
+md_atof (int type, char *litP, int *sizeP)
{
int prec;
LITTLENUM_TYPE words[MAX_LITTLENUMS];
LITTLENUM_TYPE *wordP;
char *t;
- char *atof_ieee ();
switch (type)
{
endianness. */
void
-md_number_to_chars (buf, val, n)
- char *buf;
- valueT val;
- int n;
+md_number_to_chars (char *buf, valueT val, int n)
{
- /* The ARC isn't bi-endian. Yet. */
if (target_big_endian)
number_to_chars_bigendian (buf, val, n);
else
number_to_chars_littleendian (buf, val, n);
}
-/* Round up a section size to the appropriate boundary. */
+/* Round up a section size to the appropriate boundary. */
valueT
-md_section_align (segment, size)
- segT segment;
- valueT size;
+md_section_align (segT segment, valueT size)
{
int align = bfd_get_section_alignment (stdoutput, segment);
/* We don't have any form of relaxing. */
int
-md_estimate_size_before_relax (fragp, seg)
- fragS *fragp;
- asection *seg;
+md_estimate_size_before_relax (fragS *fragp ATTRIBUTE_UNUSED,
+ asection *seg ATTRIBUTE_UNUSED)
{
- abort ();
+ as_fatal (_("md_estimate_size_before_relax\n"));
+ return 1;
}
-const relax_typeS md_relax_table[] =
-{
- { 0 }
-};
-
/* Convert a machine dependent frag. We never generate these. */
void
-md_convert_frag (abfd, sec, fragp)
- bfd *abfd;
- asection *sec;
- fragS *fragp;
+md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED,
+ asection *sec ATTRIBUTE_UNUSED,
+ fragS *fragp ATTRIBUTE_UNUSED)
{
- abort ();
+ as_fatal (_("md_convert_frag\n"));
}
-/* Parse an operand that is machine-specific.
- We just return without modifying the expression if we have nothing to do. */
-
-/* ARGSUSED */
-void
-md_operand (expressionP)
- expressionS *expressionP;
+static void
+arc_code_symbol (expressionS *expressionP)
{
+ if (expressionP->X_op == O_symbol && expressionP->X_add_number == 0)
+ {
+ expressionS two;
+
+ expressionP->X_op = O_right_shift;
+ expressionP->X_add_symbol->sy_value.X_op = O_constant;
+ two.X_op = O_constant;
+ two.X_add_symbol = two.X_op_symbol = NULL;
+ two.X_add_number = 2;
+ expressionP->X_op_symbol = make_expr_symbol (&two);
+ }
+ /* Allow %st(sym1-sym2) */
+ else if (expressionP->X_op == O_subtract
+ && expressionP->X_add_symbol != NULL
+ && expressionP->X_op_symbol != NULL
+ && expressionP->X_add_number == 0)
+ {
+ expressionS two;
+
+ expressionP->X_add_symbol = make_expr_symbol (expressionP);
+ expressionP->X_op = O_right_shift;
+ two.X_op = O_constant;
+ two.X_add_symbol = two.X_op_symbol = NULL;
+ two.X_add_number = 2;
+ expressionP->X_op_symbol = make_expr_symbol (&two);
+ }
+ else
+ as_bad ("expression too complex code symbol");
}
-/* We have no need to default values of symbols. */
+/* Parse an operand that is machine-specific.
-/* ARGSUSED */
-symbolS *
-md_undefined_symbol (name)
- char *name;
-{
- return 0;
-} /* md_undefined_symbol() */
-\f
-/* Functions concerning relocs. */
+ The ARC has a special %-op to adjust addresses so they're usable in
+ branches. The "st" is short for the STatus register.
+ ??? Later expand this to take a flags value too.
-/* The location from which a PC relative jump should be calculated,
- given a PC relative reloc. */
+ ??? We can't create new expression types so we map the %-op's onto the
+ existing syntax. This means that the user could use the chosen syntax
+ to achieve the same effect. */
-long
-md_pcrel_from (fixP)
- fixS *fixP;
+void
+md_operand (expressionS *expressionP)
{
- if (fixP->fx_addsy != (symbolS *) NULL
- && ! S_IS_DEFINED (fixP->fx_addsy))
- /* Return offset from PC to delay slot. Offsets are from there. */
- return 4;
+ char *p = input_line_pointer;
- /* Return the address of the delay slot. */
+ if (*p != '%')
+ return;
+
+ if (strncmp (p, "%st(", 4) == 0)
+ {
+ input_line_pointer += 4;
+ expression (expressionP);
+ if (*input_line_pointer != ')')
+ {
+ as_bad ("missing ')' in %%-op");
+ return;
+ }
+ ++input_line_pointer;
+ arc_code_symbol (expressionP);
+ }
+ else
+ {
+ /* It could be a register. */
+ int i, l;
+ struct arc_ext_operand_value *ext_oper = arc_ext_operands;
+ p++;
+
+ while (ext_oper)
+ {
+ l = strlen (ext_oper->operand.name);
+ if (!strncmp (p, ext_oper->operand.name, l) && !ISALNUM (*(p + l)))
+ {
+ input_line_pointer += l + 1;
+ expressionP->X_op = O_register;
+ expressionP->X_add_number = (int) &ext_oper->operand;
+ return;
+ }
+ ext_oper = ext_oper->next;
+ }
+ for (i = 0; i < arc_reg_names_count; i++)
+ {
+ l = strlen (arc_reg_names[i].name);
+ if (!strncmp (p, arc_reg_names[i].name, l) && !ISALNUM (*(p + l)))
+ {
+ input_line_pointer += l + 1;
+ expressionP->X_op = O_register;
+ expressionP->X_add_number = (int) &arc_reg_names[i];
+ break;
+ }
+ }
+ }
+}
+
+/* We have no need to default values of symbols.
+ We could catch register names here, but that is handled by inserting
+ them all in the symbol table to begin with. */
+
+symbolS *
+md_undefined_symbol (char *name ATTRIBUTE_UNUSED)
+{
+ return 0;
+}
+\f
+/* Functions concerning expressions. */
+
+/* Parse a .byte, .word, etc. expression.
+
+ Values for the status register are specified with %st(label).
+ `label' will be right shifted by 2. */
+
+void
+arc_parse_cons_expression (expressionS *exp,
+ unsigned int nbytes ATTRIBUTE_UNUSED)
+{
+ char *p = input_line_pointer;
+ int code_symbol_fix = 0;
+
+ for (; ! is_end_of_line[(unsigned char) *p]; p++)
+ if (*p == '@' && !strncmp (p, "@h30", 4))
+ {
+ code_symbol_fix = 1;
+ strcpy (p, "; ");
+ }
+ expr (0, exp);
+ if (code_symbol_fix)
+ {
+ arc_code_symbol (exp);
+ input_line_pointer = p;
+ }
+}
+
+/* Record a fixup for a cons expression. */
+
+void
+arc_cons_fix_new (fragS *frag,
+ int where,
+ int nbytes,
+ expressionS *exp)
+{
+ if (nbytes == 4)
+ {
+ int reloc_type;
+ expressionS exptmp;
+
+ /* This may be a special ARC reloc (eg: %st()). */
+ reloc_type = get_arc_exp_reloc_type (1, BFD_RELOC_32, exp, &exptmp);
+ fix_new_exp (frag, where, nbytes, &exptmp, 0, reloc_type);
+ }
+ else
+ {
+ fix_new_exp (frag, where, nbytes, exp, 0,
+ nbytes == 2 ? BFD_RELOC_16
+ : nbytes == 8 ? BFD_RELOC_64
+ : BFD_RELOC_32);
+ }
+}
+\f
+/* Functions concerning relocs. */
+
+/* The location from which a PC relative jump should be calculated,
+ given a PC relative reloc. */
+
+long
+md_pcrel_from (fixS *fixP)
+{
+ /* Return the address of the delay slot. */
return fixP->fx_frag->fr_address + fixP->fx_where + fixP->fx_size;
}
plus the operand index. Here we undo that to recover the operand
index. At this point all symbol values should be fully resolved,
and we attempt to completely resolve the reloc. If we can not do
- that, we determine the correct reloc code and put it back in the
- fixup. */
+ that, we determine the correct reloc code and put it back in the fixup. */
-int
-md_apply_fix (fixP, valueP)
- fixS *fixP;
- valueT *valueP;
+void
+md_apply_fix3 (fixS *fixP, valueT * valP, segT seg)
{
- /*char *buf = fixP->fx_where + fixP->fx_frag->fr_literal;*/
- valueT value;
-
- /* FIXME FIXME FIXME: The value we are passed in *valueP includes
- the symbol values. Since we are using BFD_ASSEMBLER, if we are
- doing this relocation the code in write.c is going to call
- bfd_perform_relocation, which is also going to use the symbol
- value. That means that if the reloc is fully resolved we want to
- use *valueP since bfd_perform_relocation is not being used.
- However, if the reloc is not fully resolved we do not want to use
- *valueP, and must use fx_offset instead. However, if the reloc
- is PC relative, we do want to use *valueP since it includes the
- result of md_pcrel_from. This is confusing. */
+ valueT value = * valP;
if (fixP->fx_addsy == (symbolS *) NULL)
- {
- value = *valueP;
- fixP->fx_done = 1;
- }
+ fixP->fx_done = 1;
+
else if (fixP->fx_pcrel)
- value = *valueP;
- else
{
- value = fixP->fx_offset;
- if (fixP->fx_subsy != (symbolS *) NULL)
- {
- if (S_GET_SEGMENT (fixP->fx_subsy) == absolute_section)
- value -= S_GET_VALUE (fixP->fx_subsy);
- else
- {
- /* We can't actually support subtracting a symbol. */
- as_bad_where (fixP->fx_file, fixP->fx_line,
- "expression too complex");
- }
- }
+ /* Hack around bfd_install_relocation brain damage. */
+ if (S_GET_SEGMENT (fixP->fx_addsy) != seg)
+ value += md_pcrel_from (fixP);
}
+ /* We can't actually support subtracting a symbol. */
+ if (fixP->fx_subsy != NULL)
+ as_bad_where (fixP->fx_file, fixP->fx_line, _("expression too complex"));
+
if ((int) fixP->fx_r_type >= (int) BFD_RELOC_UNUSED)
{
int opindex;
bfd_putl32 ((bfd_vma) insn, (unsigned char *) where);
if (fixP->fx_done)
- {
- /* Nothing else to do here. */
- return 1;
- }
+ /* Nothing else to do here. */
+ return;
/* Determine a BFD reloc value based on the operand information.
We are only prepared to turn a few of the operands into relocs.
- FIXME: Selecting the reloc type is a bit haphazard; perhaps
- there should be a new field in the operand table. */
- if ((operand->flags & ARC_OPERAND_RELATIVE) != 0
- && operand->bits == 20
- && operand->shift == 7)
- fixP->fx_r_type = BFD_RELOC_ARC_B22_PCREL;
- else if ((operand->flags & ARC_OPERAND_ABSOLUTE) != 0
- && operand->bits == 32
- && operand->shift == 32)
- fixP->fx_r_type = BFD_RELOC_32;
+ !!! Note that we can't handle limm values here. Since we're using
+ implicit addends the addend must be inserted into the instruction,
+ however, the opcode insertion routines currently do nothing with
+ limm values. */
+ if (operand->fmt == 'B')
+ {
+ assert ((operand->flags & ARC_OPERAND_RELATIVE_BRANCH) != 0
+ && operand->bits == 20
+ && operand->shift == 7);
+ fixP->fx_r_type = BFD_RELOC_ARC_B22_PCREL;
+ }
+ else if (operand->fmt == 'J')
+ {
+ assert ((operand->flags & ARC_OPERAND_ABSOLUTE_BRANCH) != 0
+ && operand->bits == 24
+ && operand->shift == 32);
+ fixP->fx_r_type = BFD_RELOC_ARC_B26;
+ }
+ else if (operand->fmt == 'L')
+ {
+ assert ((operand->flags & ARC_OPERAND_LIMM) != 0
+ && operand->bits == 32
+ && operand->shift == 32);
+ fixP->fx_r_type = BFD_RELOC_32;
+ }
else
{
as_bad_where (fixP->fx_file, fixP->fx_line,
"unresolved expression that must be resolved");
fixP->fx_done = 1;
- return 1;
+ return;
}
}
else
{
switch (fixP->fx_r_type)
{
- case BFD_RELOC_32:
+ case BFD_RELOC_8:
md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where,
- value, 4);
+ value, 1);
break;
case BFD_RELOC_16:
md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where,
value, 2);
break;
- case BFD_RELOC_8:
+ case BFD_RELOC_32:
md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where,
- value, 1);
+ value, 4);
+ break;
+ case BFD_RELOC_ARC_B26:
+ /* If !fixP->fx_done then `value' is an implicit addend.
+ We must shift it right by 2 in this case as well because the
+ linker performs the relocation and then adds this in (as opposed
+ to adding this in and then shifting right by 2). */
+ value >>= 2;
+ md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where,
+ value, 4);
break;
default:
abort ();
}
}
-
-#ifdef OBJ_ELF
- fixP->fx_addnumber = value;
-#else
- fixP->fx_addnumber = 0;
-#endif
-
- return 1;
}
/* Translate internal representation of relocation info to BFD target
format. */
arelent *
-tc_gen_reloc (section, fixP)
- asection *section;
- fixS *fixP;
+tc_gen_reloc (asection *section ATTRIBUTE_UNUSED,
+ fixS *fixP)
{
arelent *reloc;
- reloc = (arelent *) bfd_alloc_by_size_t (stdoutput, sizeof (arelent));
+ reloc = xmalloc (sizeof (arelent));
+ reloc->sym_ptr_ptr = xmalloc (sizeof (asymbol *));
- reloc->sym_ptr_ptr = &fixP->fx_addsy->bsym;
+ *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixP->fx_addsy);
reloc->address = fixP->fx_frag->fr_address + fixP->fx_where;
reloc->howto = bfd_reloc_type_lookup (stdoutput, fixP->fx_r_type);
if (reloc->howto == (reloc_howto_type *) NULL)
{
as_bad_where (fixP->fx_file, fixP->fx_line,
"internal error: can't export reloc type %d (`%s')",
- fixP->fx_r_type, bfd_get_reloc_code_name (fixP->fx_r_type));
+ fixP->fx_r_type,
+ bfd_get_reloc_code_name (fixP->fx_r_type));
return NULL;
}
- reloc->addend = fixP->fx_addnumber;
assert (!fixP->fx_pcrel == !reloc->howto->pc_relative);
+ /* Set addend to account for PC being advanced one insn before the
+ target address is computed. */
+
+ reloc->addend = (fixP->fx_pcrel ? -4 : 0);
+
return reloc;
}
-\f
-/* Frobbers. */
-#if 0
-/* Set the real name if the .rename pseudo-op was used.
- Return 1 if the symbol should not be included in the symbol table. */
+const pseudo_typeS md_pseudo_table[] =
+{
+ { "align", s_align_bytes, 0 }, /* Defaulting is invalid (0). */
+ { "comm", arc_common, 0 },
+ { "common", arc_common, 0 },
+ { "lcomm", arc_common, 1 },
+ { "lcommon", arc_common, 1 },
+ { "2byte", cons, 2 },
+ { "half", cons, 2 },
+ { "short", cons, 2 },
+ { "3byte", cons, 3 },
+ { "4byte", cons, 4 },
+ { "word", cons, 4 },
+ { "option", arc_option, 0 },
+ { "cpu", arc_option, 0 },
+ { "block", s_space, 0 },
+ { "extcondcode", arc_extoper, 0 },
+ { "extcoreregister", arc_extoper, 1 },
+ { "extauxregister", arc_extoper, 2 },
+ { "extinstruction", arc_extinst, 0 },
+ { NULL, 0, 0 },
+};
+
+/* This routine is called for each instruction to be assembled. */
-int
-arc_frob_symbol (sym)
- symbolS *sym;
+void
+md_assemble (char *str)
{
- if (sym->sy_tc.real_name != (char *) NULL)
- S_SET_NAME (sym, sym->sy_tc.real_name);
+ const struct arc_opcode *opcode;
+ const struct arc_opcode *std_opcode;
+ struct arc_opcode *ext_opcode;
+ char *start;
+ const char *last_errmsg = 0;
+ arc_insn insn;
+ static int init_tables_p = 0;
- return 0;
+ /* Opcode table initialization is deferred until here because we have to
+ wait for a possible .option command. */
+ if (!init_tables_p)
+ {
+ init_opcode_tables (arc_mach_type);
+ init_tables_p = 1;
+ }
+
+ /* Skip leading white space. */
+ while (ISSPACE (*str))
+ str++;
+
+ /* The instructions are stored in lists hashed by the first letter (though
+ we needn't care how they're hashed). Get the first in the list. */
+
+ ext_opcode = arc_ext_opcodes;
+ std_opcode = arc_opcode_lookup_asm (str);
+
+ /* Keep looking until we find a match. */
+ start = str;
+ for (opcode = (ext_opcode ? ext_opcode : std_opcode);
+ opcode != NULL;
+ opcode = (ARC_OPCODE_NEXT_ASM (opcode)
+ ? ARC_OPCODE_NEXT_ASM (opcode)
+ : (ext_opcode ? ext_opcode = NULL, std_opcode : NULL)))
+ {
+ int past_opcode_p, fc, num_suffixes;
+ int fix_up_at = 0;
+ char *syn;
+ struct arc_fixup fixups[MAX_FIXUPS];
+ /* Used as a sanity check. If we need a limm reloc, make sure we ask
+ for an extra 4 bytes from frag_more. */
+ int limm_reloc_p;
+ int ext_suffix_p;
+ const struct arc_operand_value *insn_suffixes[MAX_SUFFIXES];
+
+ /* Is this opcode supported by the selected cpu? */
+ if (! arc_opcode_supported (opcode))
+ continue;
+
+ /* Scan the syntax string. If it doesn't match, try the next one. */
+ arc_opcode_init_insert ();
+ insn = opcode->value;
+ fc = 0;
+ past_opcode_p = 0;
+ num_suffixes = 0;
+ limm_reloc_p = 0;
+ ext_suffix_p = 0;
+
+ /* We don't check for (*str != '\0') here because we want to parse
+ any trailing fake arguments in the syntax string. */
+ for (str = start, syn = opcode->syntax; *syn != '\0';)
+ {
+ int mods;
+ const struct arc_operand *operand;
+
+ /* Non operand chars must match exactly. */
+ if (*syn != '%' || *++syn == '%')
+ {
+ if (*str == *syn)
+ {
+ if (*syn == ' ')
+ past_opcode_p = 1;
+ ++syn;
+ ++str;
+ }
+ else
+ break;
+ continue;
+ }
+
+ /* We have an operand. Pick out any modifiers. */
+ mods = 0;
+ while (ARC_MOD_P (arc_operands[arc_operand_map[(int) *syn]].flags))
+ {
+ mods |= arc_operands[arc_operand_map[(int) *syn]].flags & ARC_MOD_BITS;
+ ++syn;
+ }
+ operand = arc_operands + arc_operand_map[(int) *syn];
+ if (operand->fmt == 0)
+ as_fatal ("unknown syntax format character `%c'", *syn);
+
+ if (operand->flags & ARC_OPERAND_FAKE)
+ {
+ const char *errmsg = NULL;
+ if (operand->insert)
+ {
+ insn = (*operand->insert) (insn, operand, mods, NULL, 0, &errmsg);
+ if (errmsg != (const char *) NULL)
+ {
+ last_errmsg = errmsg;
+ if (operand->flags & ARC_OPERAND_ERROR)
+ {
+ as_bad (errmsg);
+ return;
+ }
+ else if (operand->flags & ARC_OPERAND_WARN)
+ as_warn (errmsg);
+ break;
+ }
+ if (limm_reloc_p
+ && (operand->flags && operand->flags & ARC_OPERAND_LIMM)
+ && (operand->flags &
+ (ARC_OPERAND_ABSOLUTE_BRANCH | ARC_OPERAND_ADDRESS)))
+ {
+ fixups[fix_up_at].opindex = arc_operand_map[operand->fmt];
+ }
+ }
+ ++syn;
+ }
+ /* Are we finished with suffixes? */
+ else if (!past_opcode_p)
+ {
+ int found;
+ char c;
+ char *s, *t;
+ const struct arc_operand_value *suf, *suffix_end;
+ const struct arc_operand_value *suffix = NULL;
+
+ if (!(operand->flags & ARC_OPERAND_SUFFIX))
+ abort ();
+
+ /* If we're at a space in the input string, we want to skip the
+ remaining suffixes. There may be some fake ones though, so
+ just go on to try the next one. */
+ if (*str == ' ')
+ {
+ ++syn;
+ continue;
+ }
+
+ s = str;
+ if (mods & ARC_MOD_DOT)
+ {
+ if (*s != '.')
+ break;
+ ++s;
+ }
+ else
+ {
+ /* This can happen in "b.nd foo" and we're currently looking
+ for "%q" (ie: a condition code suffix). */
+ if (*s == '.')
+ {
+ ++syn;
+ continue;
+ }
+ }
+
+ /* Pick the suffix out and look it up via the hash table. */
+ for (t = s; *t && ISALNUM (*t); ++t)
+ continue;
+ c = *t;
+ *t = '\0';
+ if ((suf = get_ext_suffix (s)))
+ ext_suffix_p = 1;
+ else
+ suf = hash_find (arc_suffix_hash, s);
+ if (!suf)
+ {
+ /* This can happen in "blle foo" and we're currently using
+ the template "b%q%.n %j". The "bl" insn occurs later in
+ the table so "lle" isn't an illegal suffix. */
+ *t = c;
+ break;
+ }
+
+ /* Is it the right type? Note that the same character is used
+ several times, so we have to examine all of them. This is
+ relatively efficient as equivalent entries are kept
+ together. If it's not the right type, don't increment `str'
+ so we try the next one in the series. */
+ found = 0;
+ if (ext_suffix_p && arc_operands[suf->type].fmt == *syn)
+ {
+ /* Insert the suffix's value into the insn. */
+ *t = c;
+ if (operand->insert)
+ insn = (*operand->insert) (insn, operand,
+ mods, NULL, suf->value,
+ NULL);
+ else
+ insn |= suf->value << operand->shift;
+ suffix = suf;
+ str = t;
+ found = 1;
+ }
+ else
+ {
+ *t = c;
+ suffix_end = arc_suffixes + arc_suffixes_count;
+ for (suffix = suf;
+ suffix < suffix_end && strcmp (suffix->name, suf->name) == 0;
+ ++suffix)
+ {
+ if (arc_operands[suffix->type].fmt == *syn)
+ {
+ /* Insert the suffix's value into the insn. */
+ if (operand->insert)
+ insn = (*operand->insert) (insn, operand,
+ mods, NULL, suffix->value,
+ NULL);
+ else
+ insn |= suffix->value << operand->shift;
+
+ str = t;
+ found = 1;
+ break;
+ }
+ }
+ }
+ ++syn;
+ if (!found)
+ /* Wrong type. Just go on to try next insn entry. */
+ ;
+ else
+ {
+ if (num_suffixes == MAX_SUFFIXES)
+ as_bad ("too many suffixes");
+ else
+ insn_suffixes[num_suffixes++] = suffix;
+ }
+ }
+ else
+ /* This is either a register or an expression of some kind. */
+ {
+ char *hold;
+ const struct arc_operand_value *reg = NULL;
+ long value = 0;
+ expressionS exp;
+
+ if (operand->flags & ARC_OPERAND_SUFFIX)
+ abort ();
+
+ /* Is there anything left to parse?
+ We don't check for this at the top because we want to parse
+ any trailing fake arguments in the syntax string. */
+ if (is_end_of_line[(unsigned char) *str])
+ break;
+
+ /* Parse the operand. */
+ hold = input_line_pointer;
+ input_line_pointer = str;
+ expression (&exp);
+ str = input_line_pointer;
+ input_line_pointer = hold;
+
+ if (exp.X_op == O_illegal)
+ as_bad ("illegal operand");
+ else if (exp.X_op == O_absent)
+ as_bad ("missing operand");
+ else if (exp.X_op == O_constant)
+ value = exp.X_add_number;
+ else if (exp.X_op == O_register)
+ reg = (struct arc_operand_value *) exp.X_add_number;
+#define IS_REG_DEST_OPERAND(o) ((o) == 'a')
+ else if (IS_REG_DEST_OPERAND (*syn))
+ as_bad ("symbol as destination register");
+ else
+ {
+ if (!strncmp (str, "@h30", 4))
+ {
+ arc_code_symbol (&exp);
+ str += 4;
+ }
+ /* We need to generate a fixup for this expression. */
+ if (fc >= MAX_FIXUPS)
+ as_fatal ("too many fixups");
+ fixups[fc].exp = exp;
+ /* We don't support shimm relocs. break here to force
+ the assembler to output a limm. */
+#define IS_REG_SHIMM_OFFSET(o) ((o) == 'd')
+ if (IS_REG_SHIMM_OFFSET (*syn))
+ break;
+ /* If this is a register constant (IE: one whose
+ register value gets stored as 61-63) then this
+ must be a limm. */
+ /* ??? This bit could use some cleaning up.
+ Referencing the format chars like this goes
+ against style. */
+ if (IS_SYMBOL_OPERAND (*syn))
+ {
+ const char *junk;
+ limm_reloc_p = 1;
+ /* Save this, we don't yet know what reloc to use. */
+ fix_up_at = fc;
+ /* Tell insert_reg we need a limm. This is
+ needed because the value at this point is
+ zero, a shimm. */
+ /* ??? We need a cleaner interface than this. */
+ (*arc_operands[arc_operand_map['Q']].insert)
+ (insn, operand, mods, reg, 0L, &junk);
+ }
+ else
+ fixups[fc].opindex = arc_operand_map[(int) *syn];
+ ++fc;
+ value = 0;
+ }
+
+ /* Insert the register or expression into the instruction. */
+ if (operand->insert)
+ {
+ const char *errmsg = NULL;
+ insn = (*operand->insert) (insn, operand, mods,
+ reg, (long) value, &errmsg);
+ if (errmsg != (const char *) NULL)
+ {
+ last_errmsg = errmsg;
+ if (operand->flags & ARC_OPERAND_ERROR)
+ {
+ as_bad (errmsg);
+ return;
+ }
+ else if (operand->flags & ARC_OPERAND_WARN)
+ as_warn (errmsg);
+ break;
+ }
+ }
+ else
+ insn |= (value & ((1 << operand->bits) - 1)) << operand->shift;
+
+ ++syn;
+ }
+ }
+
+ /* If we're at the end of the syntax string, we're done. */
+ /* FIXME: try to move this to a separate function. */
+ if (*syn == '\0')
+ {
+ int i;
+ char *f;
+ long limm, limm_p;
+
+ /* For the moment we assume a valid `str' can only contain blanks
+ now. IE: We needn't try again with a longer version of the
+ insn and it is assumed that longer versions of insns appear
+ before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */
+
+ while (ISSPACE (*str))
+ ++str;
+
+ if (!is_end_of_line[(unsigned char) *str])
+ as_bad ("junk at end of line: `%s'", str);
+
+ /* Is there a limm value? */
+ limm_p = arc_opcode_limm_p (&limm);
+
+ /* Perform various error and warning tests. */
+
+ {
+ static int in_delay_slot_p = 0;
+ static int prev_insn_needs_cc_nop_p = 0;
+ /* delay slot type seen */
+ int delay_slot_type = ARC_DELAY_NONE;
+ /* conditional execution flag seen */
+ int conditional = 0;
+ /* 1 if condition codes are being set */
+ int cc_set_p = 0;
+ /* 1 if conditional branch, including `b' "branch always" */
+ int cond_branch_p = opcode->flags & ARC_OPCODE_COND_BRANCH;
+
+ for (i = 0; i < num_suffixes; ++i)
+ {
+ switch (arc_operands[insn_suffixes[i]->type].fmt)
+ {
+ case 'n':
+ delay_slot_type = insn_suffixes[i]->value;
+ break;
+ case 'q':
+ conditional = insn_suffixes[i]->value;
+ break;
+ case 'f':
+ cc_set_p = 1;
+ break;
+ }
+ }
+
+ /* Putting an insn with a limm value in a delay slot is supposed to
+ be legal, but let's warn the user anyway. Ditto for 8 byte
+ jumps with delay slots. */
+ if (in_delay_slot_p && limm_p)
+ as_warn ("8 byte instruction in delay slot");
+ if (delay_slot_type != ARC_DELAY_NONE
+ && limm_p && arc_insn_not_jl (insn)) /* except for jl addr */
+ as_warn ("8 byte jump instruction with delay slot");
+ in_delay_slot_p = (delay_slot_type != ARC_DELAY_NONE) && !limm_p;
+
+ /* Warn when a conditional branch immediately follows a set of
+ the condition codes. Note that this needn't be done if the
+ insn that sets the condition codes uses a limm. */
+ if (cond_branch_p && conditional != 0 /* 0 = "always" */
+ && prev_insn_needs_cc_nop_p && arc_mach_type == bfd_mach_arc_5)
+ as_warn ("conditional branch follows set of flags");
+ prev_insn_needs_cc_nop_p =
+ /* FIXME: ??? not required:
+ (delay_slot_type != ARC_DELAY_NONE) && */
+ cc_set_p && !limm_p;
+ }
+
+ /* Write out the instruction.
+ It is important to fetch enough space in one call to `frag_more'.
+ We use (f - frag_now->fr_literal) to compute where we are and we
+ don't want frag_now to change between calls. */
+ if (limm_p)
+ {
+ f = frag_more (8);
+ md_number_to_chars (f, insn, 4);
+ md_number_to_chars (f + 4, limm, 4);
+ dwarf2_emit_insn (8);
+ }
+ else if (limm_reloc_p)
+ /* We need a limm reloc, but the tables think we don't. */
+ abort ();
+ else
+ {
+ f = frag_more (4);
+ md_number_to_chars (f, insn, 4);
+ dwarf2_emit_insn (4);
+ }
+
+ /* Create any fixups. */
+ for (i = 0; i < fc; ++i)
+ {
+ int op_type, reloc_type;
+ expressionS exptmp;
+ const struct arc_operand *operand;
+
+ /* Create a fixup for this operand.
+ At this point we do not use a bfd_reloc_code_real_type for
+ operands residing in the insn, but instead just use the
+ operand index. This lets us easily handle fixups for any
+ operand type, although that is admittedly not a very exciting
+ feature. We pick a BFD reloc type in md_apply_fix3.
+
+ Limm values (4 byte immediate "constants") must be treated
+ normally because they're not part of the actual insn word
+ and thus the insertion routines don't handle them. */
+
+ if (arc_operands[fixups[i].opindex].flags & ARC_OPERAND_LIMM)
+ {
+ /* Modify the fixup addend as required by the cpu. */
+ fixups[i].exp.X_add_number += arc_limm_fixup_adjust (insn);
+ op_type = fixups[i].opindex;
+ /* FIXME: can we add this data to the operand table? */
+ if (op_type == arc_operand_map['L']
+ || op_type == arc_operand_map['s']
+ || op_type == arc_operand_map['o']
+ || op_type == arc_operand_map['O'])
+ reloc_type = BFD_RELOC_32;
+ else if (op_type == arc_operand_map['J'])
+ reloc_type = BFD_RELOC_ARC_B26;
+ else
+ abort ();
+ reloc_type = get_arc_exp_reloc_type (1, reloc_type,
+ &fixups[i].exp,
+ &exptmp);
+ }
+ else
+ {
+ op_type = get_arc_exp_reloc_type (0, fixups[i].opindex,
+ &fixups[i].exp, &exptmp);
+ reloc_type = op_type + (int) BFD_RELOC_UNUSED;
+ }
+ operand = &arc_operands[op_type];
+ fix_new_exp (frag_now,
+ ((f - frag_now->fr_literal)
+ + (operand->flags & ARC_OPERAND_LIMM ? 4 : 0)), 4,
+ &exptmp,
+ (operand->flags & ARC_OPERAND_RELATIVE_BRANCH) != 0,
+ (bfd_reloc_code_real_type) reloc_type);
+ }
+ return;
+ }
+ }
+
+ if (NULL == last_errmsg)
+ as_bad ("bad instruction `%s'", start);
+ else
+ as_bad (last_errmsg);
}
-#endif
projects / binutils-gdb.git / blobdiff