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[/] [openrisc/] [tags/] [gdb/] [gdb-6.8/] [gdb-6.8.openrisc-2.1/] [opcodes/] [cgen-asm.c] - Rev 74
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/* CGEN generic assembler support code. Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2007 Free Software Foundation, Inc. This file is part of libopcodes. This library is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. It is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ #include "sysdep.h" #include <stdio.h> #include "ansidecl.h" #include "libiberty.h" #include "safe-ctype.h" #include "bfd.h" #include "symcat.h" #include "opcode/cgen.h" #include "opintl.h" static CGEN_INSN_LIST * hash_insn_array (CGEN_CPU_DESC, const CGEN_INSN *, int, int, CGEN_INSN_LIST **, CGEN_INSN_LIST *); static CGEN_INSN_LIST * hash_insn_list (CGEN_CPU_DESC, const CGEN_INSN_LIST *, CGEN_INSN_LIST **, CGEN_INSN_LIST *); static void build_asm_hash_table (CGEN_CPU_DESC); /* Set the cgen_parse_operand_fn callback. */ void cgen_set_parse_operand_fn (CGEN_CPU_DESC cd, cgen_parse_operand_fn fn) { cd->parse_operand_fn = fn; } /* Called whenever starting to parse an insn. */ void cgen_init_parse_operand (CGEN_CPU_DESC cd) { /* This tells the callback to re-initialize. */ (void) (* cd->parse_operand_fn) (cd, CGEN_PARSE_OPERAND_INIT, NULL, 0, 0, NULL, NULL); } /* Subroutine of build_asm_hash_table to add INSNS to the hash table. COUNT is the number of elements in INSNS. ENTSIZE is sizeof (CGEN_IBASE) for the target. ??? No longer used but leave in for now. HTABLE points to the hash table. HENTBUF is a pointer to sufficiently large buffer of hash entries. The result is a pointer to the next entry to use. The table is scanned backwards as additions are made to the front of the list and we want earlier ones to be prefered. */ static CGEN_INSN_LIST * hash_insn_array (CGEN_CPU_DESC cd, const CGEN_INSN *insns, int count, int entsize ATTRIBUTE_UNUSED, CGEN_INSN_LIST **htable, CGEN_INSN_LIST *hentbuf) { int i; for (i = count - 1; i >= 0; --i, ++hentbuf) { unsigned int hash; const CGEN_INSN *insn = &insns[i]; if (! (* cd->asm_hash_p) (insn)) continue; hash = (* cd->asm_hash) (CGEN_INSN_MNEMONIC (insn)); hentbuf->next = htable[hash]; hentbuf->insn = insn; htable[hash] = hentbuf; } return hentbuf; } /* Subroutine of build_asm_hash_table to add INSNS to the hash table. This function is identical to hash_insn_array except the insns are in a list. */ static CGEN_INSN_LIST * hash_insn_list (CGEN_CPU_DESC cd, const CGEN_INSN_LIST *insns, CGEN_INSN_LIST **htable, CGEN_INSN_LIST *hentbuf) { const CGEN_INSN_LIST *ilist; for (ilist = insns; ilist != NULL; ilist = ilist->next, ++ hentbuf) { unsigned int hash; if (! (* cd->asm_hash_p) (ilist->insn)) continue; hash = (* cd->asm_hash) (CGEN_INSN_MNEMONIC (ilist->insn)); hentbuf->next = htable[hash]; hentbuf->insn = ilist->insn; htable[hash] = hentbuf; } return hentbuf; } /* Build the assembler instruction hash table. */ static void build_asm_hash_table (CGEN_CPU_DESC cd) { int count = cgen_insn_count (cd) + cgen_macro_insn_count (cd); CGEN_INSN_TABLE *insn_table = &cd->insn_table; CGEN_INSN_TABLE *macro_insn_table = &cd->macro_insn_table; unsigned int hash_size = cd->asm_hash_size; CGEN_INSN_LIST *hash_entry_buf; CGEN_INSN_LIST **asm_hash_table; CGEN_INSN_LIST *asm_hash_table_entries; /* The space allocated for the hash table consists of two parts: the hash table and the hash lists. */ asm_hash_table = (CGEN_INSN_LIST **) xmalloc (hash_size * sizeof (CGEN_INSN_LIST *)); memset (asm_hash_table, 0, hash_size * sizeof (CGEN_INSN_LIST *)); asm_hash_table_entries = hash_entry_buf = (CGEN_INSN_LIST *) xmalloc (count * sizeof (CGEN_INSN_LIST)); /* Add compiled in insns. Don't include the first one as it is a reserved entry. */ /* ??? It was the end of all hash chains, and also the special "invalid insn" marker. May be able to do it differently now. */ hash_entry_buf = hash_insn_array (cd, insn_table->init_entries + 1, insn_table->num_init_entries - 1, insn_table->entry_size, asm_hash_table, hash_entry_buf); /* Add compiled in macro-insns. */ hash_entry_buf = hash_insn_array (cd, macro_insn_table->init_entries, macro_insn_table->num_init_entries, macro_insn_table->entry_size, asm_hash_table, hash_entry_buf); /* Add runtime added insns. Later added insns will be prefered over earlier ones. */ hash_entry_buf = hash_insn_list (cd, insn_table->new_entries, asm_hash_table, hash_entry_buf); /* Add runtime added macro-insns. */ hash_insn_list (cd, macro_insn_table->new_entries, asm_hash_table, hash_entry_buf); cd->asm_hash_table = asm_hash_table; cd->asm_hash_table_entries = asm_hash_table_entries; } /* Return the first entry in the hash list for INSN. */ CGEN_INSN_LIST * cgen_asm_lookup_insn (CGEN_CPU_DESC cd, const char *insn) { unsigned int hash; if (cd->asm_hash_table == NULL) build_asm_hash_table (cd); hash = (* cd->asm_hash) (insn); return cd->asm_hash_table[hash]; } /* Keyword parser. The result is NULL upon success or an error message. If successful, *STRP is updated to point passed the keyword. ??? At present we have a static notion of how to pick out a keyword. Later we can allow a target to customize this if necessary [say by recording something in the keyword table]. */ const char * cgen_parse_keyword (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, const char **strp, CGEN_KEYWORD *keyword_table, long *valuep) { const CGEN_KEYWORD_ENTRY *ke; char buf[256]; const char *p,*start; if (keyword_table->name_hash_table == NULL) (void) cgen_keyword_search_init (keyword_table, NULL); p = start = *strp; /* Allow any first character. This is to make life easier for the fairly common case of suffixes, eg. 'ld.b.w', where the first character of the suffix ('.') is special. */ if (*p) ++p; /* Allow letters, digits, and any special characters. */ while (((p - start) < (int) sizeof (buf)) && *p && (ISALNUM (*p) || *p == '_' || strchr (keyword_table->nonalpha_chars, *p))) ++p; if (p - start >= (int) sizeof (buf)) { /* All non-empty CGEN keywords can fit into BUF. The only thing we can match here is the empty keyword. */ buf[0] = 0; } else { memcpy (buf, start, p - start); buf[p - start] = 0; } ke = cgen_keyword_lookup_name (keyword_table, buf); if (ke != NULL) { *valuep = ke->value; /* Don't advance pointer if we recognized the null keyword. */ if (ke->name[0] != 0) *strp = p; return NULL; } return "unrecognized keyword/register name"; } /* Parse a small signed integer parser. ??? VALUEP is not a bfd_vma * on purpose, though this is confusing. Note that if the caller expects a bfd_vma result, it should call cgen_parse_address. */ const char * cgen_parse_signed_integer (CGEN_CPU_DESC cd, const char **strp, int opindex, long *valuep) { bfd_vma value; enum cgen_parse_operand_result result; const char *errmsg; errmsg = (* cd->parse_operand_fn) (cd, CGEN_PARSE_OPERAND_INTEGER, strp, opindex, BFD_RELOC_NONE, &result, &value); /* FIXME: Examine `result'. */ if (!errmsg) *valuep = value; return errmsg; } /* Parse a small unsigned integer parser. ??? VALUEP is not a bfd_vma * on purpose, though this is confusing. Note that if the caller expects a bfd_vma result, it should call cgen_parse_address. */ const char * cgen_parse_unsigned_integer (CGEN_CPU_DESC cd, const char **strp, int opindex, unsigned long *valuep) { bfd_vma value; enum cgen_parse_operand_result result; const char *errmsg; errmsg = (* cd->parse_operand_fn) (cd, CGEN_PARSE_OPERAND_INTEGER, strp, opindex, BFD_RELOC_NONE, &result, &value); /* FIXME: Examine `result'. */ if (!errmsg) *valuep = value; return errmsg; } /* Address parser. */ const char * cgen_parse_address (CGEN_CPU_DESC cd, const char **strp, int opindex, int opinfo, enum cgen_parse_operand_result *resultp, bfd_vma *valuep) { bfd_vma value; enum cgen_parse_operand_result result_type; const char *errmsg; errmsg = (* cd->parse_operand_fn) (cd, CGEN_PARSE_OPERAND_ADDRESS, strp, opindex, opinfo, &result_type, &value); /* FIXME: Examine `result'. */ if (!errmsg) { if (resultp != NULL) *resultp = result_type; *valuep = value; } return errmsg; } /* Signed integer validation routine. */ const char * cgen_validate_signed_integer (long value, long min, long max) { if (value < min || value > max) { static char buf[100]; /* xgettext:c-format */ sprintf (buf, _("operand out of range (%ld not between %ld and %ld)"), value, min, max); return buf; } return NULL; } /* Unsigned integer validation routine. Supplying `min' here may seem unnecessary, but we also want to handle cases where min != 0 (and max > LONG_MAX). */ const char * cgen_validate_unsigned_integer (unsigned long value, unsigned long min, unsigned long max) { if (value < min || value > max) { static char buf[100]; /* xgettext:c-format */ sprintf (buf, _("operand out of range (%lu not between %lu and %lu)"), value, min, max); return buf; } return NULL; }
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