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Diffstat (limited to 'opcodes/fr30-asm.c')
| -rw-r--r-- | opcodes/fr30-asm.c | 560 |
1 files changed, 560 insertions, 0 deletions
diff --git a/opcodes/fr30-asm.c b/opcodes/fr30-asm.c new file mode 100644 index 00000000000..5f5ccdc0b80 --- /dev/null +++ b/opcodes/fr30-asm.c @@ -0,0 +1,560 @@ +/* Assembler interface for targets using CGEN. -*- C -*- + CGEN: Cpu tools GENerator + +THIS FILE IS MACHINE GENERATED WITH CGEN. +- the resultant file is machine generated, cgen-asm.in isn't + +Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc. + +This file is part of the GNU Binutils and GDB, the GNU debugger. + +This program 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 2, or (at your option) +any later version. + +This program 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., +59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + +/* ??? Eventually more and more of this stuff can go to cpu-independent files. + Keep that in mind. */ + +#include "sysdep.h" +#include <ctype.h> +#include <stdio.h> +#include "ansidecl.h" +#include "bfd.h" +#include "symcat.h" +#include "fr30-desc.h" +#include "fr30-opc.h" +#include "opintl.h" + +#undef min +#define min(a,b) ((a) < (b) ? (a) : (b)) +#undef max +#define max(a,b) ((a) > (b) ? (a) : (b)) + +static const char * parse_insn_normal + PARAMS ((CGEN_CPU_DESC, const CGEN_INSN *, const char **, CGEN_FIELDS *)); + +/* -- assembler routines inserted here */ + +/* -- asm.c */ +/* Handle register lists for LDMx and STMx */ + +static int +parse_register_number (strp) + const char **strp; +{ + int regno; + if (**strp < '0' || **strp > '9') + return -1; /* error */ + regno = **strp - '0'; + ++*strp; + + if (**strp >= '0' && **strp <= '9') + { + regno = regno * 10 + (**strp - '0'); + ++*strp; + } + + return regno; +} + +static const char * +parse_register_list (cd, strp, opindex, valuep, high_low, load_store) + CGEN_CPU_DESC cd; + const char **strp; + int opindex; + unsigned long *valuep; + int high_low; /* 0 == high, 1 == low */ + int load_store; /* 0 == load, 1 == store */ +{ + int regno; + *valuep = 0; + while (**strp && **strp != ')') + { + if (**strp != 'R' && **strp != 'r') + break; + ++*strp; + + regno = parse_register_number (strp); + if (regno == -1) + return "Register number is not valid"; + if (regno > 7 && !high_low) + return "Register must be between r0 and r7"; + if (regno < 8 && high_low) + return "Register must be between r8 and r15"; + + if (high_low) + regno -= 8; + + if (load_store) /* mask is reversed for store */ + *valuep |= 0x80 >> regno; + else + *valuep |= 1 << regno; + + if (**strp == ',') + { + if (*(*strp + 1) == ')') + break; + ++*strp; + } + } + + if (!*strp || **strp != ')') + return "Register list is not valid"; + + return NULL; +} + +static const char * +parse_low_register_list_ld (cd, strp, opindex, valuep) + CGEN_CPU_DESC cd; + const char **strp; + int opindex; + unsigned long *valuep; +{ + return parse_register_list (cd, strp, opindex, valuep, 0/*low*/, 0/*load*/); +} + +static const char * +parse_hi_register_list_ld (cd, strp, opindex, valuep) + CGEN_CPU_DESC cd; + const char **strp; + int opindex; + unsigned long *valuep; +{ + return parse_register_list (cd, strp, opindex, valuep, 1/*high*/, 0/*load*/); +} + +static const char * +parse_low_register_list_st (cd, strp, opindex, valuep) + CGEN_CPU_DESC cd; + const char **strp; + int opindex; + unsigned long *valuep; +{ + return parse_register_list (cd, strp, opindex, valuep, 0/*low*/, 1/*store*/); +} + +static const char * +parse_hi_register_list_st (cd, strp, opindex, valuep) + CGEN_CPU_DESC cd; + const char **strp; + int opindex; + unsigned long *valuep; +{ + return parse_register_list (cd, strp, opindex, valuep, 1/*high*/, 1/*store*/); +} + +/* -- */ + +/* Main entry point for operand parsing. + + This function is basically just a big switch statement. Earlier versions + used tables to look up the function to use, but + - if the table contains both assembler and disassembler functions then + the disassembler contains much of the assembler and vice-versa, + - there's a lot of inlining possibilities as things grow, + - using a switch statement avoids the function call overhead. + + This function could be moved into `parse_insn_normal', but keeping it + separate makes clear the interface between `parse_insn_normal' and each of + the handlers. +*/ + +const char * +fr30_cgen_parse_operand (cd, opindex, strp, fields) + CGEN_CPU_DESC cd; + int opindex; + const char ** strp; + CGEN_FIELDS * fields; +{ + const char * errmsg; + + switch (opindex) + { + case FR30_OPERAND_CRI : + errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_cr_names, & fields->f_CRi); + break; + case FR30_OPERAND_CRJ : + errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_cr_names, & fields->f_CRj); + break; + case FR30_OPERAND_R13 : + errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_h_r13, & fields->f_nil); + break; + case FR30_OPERAND_R14 : + errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_h_r14, & fields->f_nil); + break; + case FR30_OPERAND_R15 : + errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_h_r15, & fields->f_nil); + break; + case FR30_OPERAND_RI : + errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_gr_names, & fields->f_Ri); + break; + case FR30_OPERAND_RIC : + errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_gr_names, & fields->f_Ric); + break; + case FR30_OPERAND_RJ : + errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_gr_names, & fields->f_Rj); + break; + case FR30_OPERAND_RJC : + errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_gr_names, & fields->f_Rjc); + break; + case FR30_OPERAND_RS1 : + errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_dr_names, & fields->f_Rs1); + break; + case FR30_OPERAND_RS2 : + errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_dr_names, & fields->f_Rs2); + break; + case FR30_OPERAND_CC : + errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_CC, &fields->f_cc); + break; + case FR30_OPERAND_CCC : + errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_CCC, &fields->f_ccc); + break; + case FR30_OPERAND_DIR10 : + errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_DIR10, &fields->f_dir10); + break; + case FR30_OPERAND_DIR8 : + errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_DIR8, &fields->f_dir8); + break; + case FR30_OPERAND_DIR9 : + errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_DIR9, &fields->f_dir9); + break; + case FR30_OPERAND_DISP10 : + errmsg = cgen_parse_signed_integer (cd, strp, FR30_OPERAND_DISP10, &fields->f_disp10); + break; + case FR30_OPERAND_DISP8 : + errmsg = cgen_parse_signed_integer (cd, strp, FR30_OPERAND_DISP8, &fields->f_disp8); + break; + case FR30_OPERAND_DISP9 : + errmsg = cgen_parse_signed_integer (cd, strp, FR30_OPERAND_DISP9, &fields->f_disp9); + break; + case FR30_OPERAND_I20 : + errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_I20, &fields->f_i20); + break; + case FR30_OPERAND_I32 : + errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_I32, &fields->f_i32); + break; + case FR30_OPERAND_I8 : + errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_I8, &fields->f_i8); + break; + case FR30_OPERAND_LABEL12 : + { + bfd_vma value; + errmsg = cgen_parse_address (cd, strp, FR30_OPERAND_LABEL12, 0, NULL, & value); + fields->f_rel12 = value; + } + break; + case FR30_OPERAND_LABEL9 : + { + bfd_vma value; + errmsg = cgen_parse_address (cd, strp, FR30_OPERAND_LABEL9, 0, NULL, & value); + fields->f_rel9 = value; + } + break; + case FR30_OPERAND_M4 : + errmsg = cgen_parse_signed_integer (cd, strp, FR30_OPERAND_M4, &fields->f_m4); + break; + case FR30_OPERAND_PS : + errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_h_ps, & fields->f_nil); + break; + case FR30_OPERAND_REGLIST_HI_LD : + errmsg = parse_hi_register_list_ld (cd, strp, FR30_OPERAND_REGLIST_HI_LD, &fields->f_reglist_hi_ld); + break; + case FR30_OPERAND_REGLIST_HI_ST : + errmsg = parse_hi_register_list_st (cd, strp, FR30_OPERAND_REGLIST_HI_ST, &fields->f_reglist_hi_st); + break; + case FR30_OPERAND_REGLIST_LOW_LD : + errmsg = parse_low_register_list_ld (cd, strp, FR30_OPERAND_REGLIST_LOW_LD, &fields->f_reglist_low_ld); + break; + case FR30_OPERAND_REGLIST_LOW_ST : + errmsg = parse_low_register_list_st (cd, strp, FR30_OPERAND_REGLIST_LOW_ST, &fields->f_reglist_low_st); + break; + case FR30_OPERAND_S10 : + errmsg = cgen_parse_signed_integer (cd, strp, FR30_OPERAND_S10, &fields->f_s10); + break; + case FR30_OPERAND_U10 : + errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_U10, &fields->f_u10); + break; + case FR30_OPERAND_U4 : + errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_U4, &fields->f_u4); + break; + case FR30_OPERAND_U4C : + errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_U4C, &fields->f_u4c); + break; + case FR30_OPERAND_U8 : + errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_U8, &fields->f_u8); + break; + case FR30_OPERAND_UDISP6 : + errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_UDISP6, &fields->f_udisp6); + break; + + default : + /* xgettext:c-format */ + fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex); + abort (); + } + + return errmsg; +} + +cgen_parse_fn * const fr30_cgen_parse_handlers[] = +{ + parse_insn_normal, +}; + +void +fr30_cgen_init_asm (cd) + CGEN_CPU_DESC cd; +{ + fr30_cgen_init_opcode_table (cd); + fr30_cgen_init_ibld_table (cd); + cd->parse_handlers = & fr30_cgen_parse_handlers[0]; + cd->parse_operand = fr30_cgen_parse_operand; +} + + +/* Default insn parser. + + The syntax string is scanned and operands are parsed and stored in FIELDS. + Relocs are queued as we go via other callbacks. + + ??? Note that this is currently an all-or-nothing parser. If we fail to + parse the instruction, we return 0 and the caller will start over from + the beginning. Backtracking will be necessary in parsing subexpressions, + but that can be handled there. Not handling backtracking here may get + expensive in the case of the m68k. Deal with later. + + Returns NULL for success, an error message for failure. +*/ + +static const char * +parse_insn_normal (cd, insn, strp, fields) + CGEN_CPU_DESC cd; + const CGEN_INSN *insn; + const char **strp; + CGEN_FIELDS *fields; +{ + /* ??? Runtime added insns not handled yet. */ + const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); + const char *str = *strp; + const char *errmsg; + const char *p; + const unsigned char * syn; +#ifdef CGEN_MNEMONIC_OPERANDS + /* FIXME: wip */ + int past_opcode_p; +#endif + + /* For now we assume the mnemonic is first (there are no leading operands). + We can parse it without needing to set up operand parsing. + GAS's input scrubber will ensure mnemonics are lowercase, but we may + not be called from GAS. */ + p = CGEN_INSN_MNEMONIC (insn); + while (*p && tolower (*p) == tolower (*str)) + ++p, ++str; + + if (* p || (* str && !isspace (* str))) + return _("unrecognized instruction"); + + CGEN_INIT_PARSE (cd); + cgen_init_parse_operand (cd); +#ifdef CGEN_MNEMONIC_OPERANDS + past_opcode_p = 0; +#endif + + /* We don't check for (*str != '\0') here because we want to parse + any trailing fake arguments in the syntax string. */ + syn = CGEN_SYNTAX_STRING (syntax); + + /* Mnemonics come first for now, ensure valid string. */ + if (! CGEN_SYNTAX_MNEMONIC_P (* syn)) + abort (); + + ++syn; + + while (* syn != 0) + { + /* Non operand chars must match exactly. */ + if (CGEN_SYNTAX_CHAR_P (* syn)) + { + if (*str == CGEN_SYNTAX_CHAR (* syn)) + { +#ifdef CGEN_MNEMONIC_OPERANDS + if (* syn == ' ') + past_opcode_p = 1; +#endif + ++ syn; + ++ str; + } + else + { + /* Syntax char didn't match. Can't be this insn. */ + /* FIXME: would like to return something like + "expected char `c'" */ + return _("syntax error"); + } + continue; + } + + /* We have an operand of some sort. */ + errmsg = fr30_cgen_parse_operand (cd, CGEN_SYNTAX_FIELD (*syn), + &str, fields); + if (errmsg) + return errmsg; + + /* Done with this operand, continue with next one. */ + ++ syn; + } + + /* If we're at the end of the syntax string, we're done. */ + if (* syn == '\0') + { + /* FIXME: 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 (* str != '\0') + return _("junk at end of line"); /* FIXME: would like to include `str' */ + + return NULL; + } + + /* We couldn't parse it. */ + return _("unrecognized instruction"); +} + +/* Main entry point. + This routine is called for each instruction to be assembled. + STR points to the insn to be assembled. + We assume all necessary tables have been initialized. + The assembled instruction, less any fixups, is stored in BUF. + Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value + still needs to be converted to target byte order, otherwise BUF is an array + of bytes in target byte order. + The result is a pointer to the insn's entry in the opcode table, + or NULL if an error occured (an error message will have already been + printed). + + Note that when processing (non-alias) macro-insns, + this function recurses. + + ??? It's possible to make this cpu-independent. + One would have to deal with a few minor things. + At this point in time doing so would be more of a curiosity than useful + [for example this file isn't _that_ big], but keeping the possibility in + mind helps keep the design clean. */ + +const CGEN_INSN * +fr30_cgen_assemble_insn (cd, str, fields, buf, errmsg) + CGEN_CPU_DESC cd; + const char *str; + CGEN_FIELDS *fields; + CGEN_INSN_BYTES_PTR buf; + char **errmsg; +{ + const char *start; + CGEN_INSN_LIST *ilist; + + /* Skip leading white space. */ + while (isspace (* str)) + ++ str; + + /* The instructions are stored in hashed lists. + Get the first in the list. */ + ilist = CGEN_ASM_LOOKUP_INSN (cd, str); + + /* Keep looking until we find a match. */ + + start = str; + for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist)) + { + const CGEN_INSN *insn = ilist->insn; + +#if 0 /* not needed as unsupported opcodes shouldn't be in the hash lists */ + /* Is this insn supported by the selected cpu? */ + if (! fr30_cgen_insn_supported (cd, insn)) + continue; +#endif + + /* If the RELAX attribute is set, this is an insn that shouldn't be + chosen immediately. Instead, it is used during assembler/linker + relaxation if possible. */ + if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAX) != 0) + continue; + + str = start; + + /* Allow parse/insert handlers to obtain length of insn. */ + CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn); + + if (! CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields)) + { + /* ??? 0 is passed for `pc' */ + if (CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf, (bfd_vma) 0) + != NULL) + continue; + /* It is up to the caller to actually output the insn and any + queued relocs. */ + return insn; + } + + /* Try the next entry. */ + } + + /* FIXME: We can return a better error message than this. + Need to track why it failed and pick the right one. */ + { + static char errbuf[100]; + if (strlen (start) > 50) + /* xgettext:c-format */ + sprintf (errbuf, _("bad instruction `%.50s...'"), start); + else + /* xgettext:c-format */ + sprintf (errbuf, _("bad instruction `%.50s'"), start); + + *errmsg = errbuf; + return NULL; + } +} + +#if 0 /* This calls back to GAS which we can't do without care. */ + +/* Record each member of OPVALS in the assembler's symbol table. + This lets GAS parse registers for us. + ??? Interesting idea but not currently used. */ + +/* Record each member of OPVALS in the assembler's symbol table. + FIXME: Not currently used. */ + +void +fr30_cgen_asm_hash_keywords (cd, opvals) + CGEN_CPU_DESC cd; + CGEN_KEYWORD *opvals; +{ + CGEN_KEYWORD_SEARCH search = cgen_keyword_search_init (opvals, NULL); + const CGEN_KEYWORD_ENTRY * ke; + + while ((ke = cgen_keyword_search_next (& search)) != NULL) + { +#if 0 /* Unnecessary, should be done in the search routine. */ + if (! fr30_cgen_opval_supported (ke)) + continue; +#endif + cgen_asm_record_register (cd, ke->name, ke->value); + } +} + +#endif /* 0 */ |