diff options
Diffstat (limited to 'opcodes/mep-asm.c')
| -rw-r--r-- | opcodes/mep-asm.c | 1398 |
1 files changed, 1398 insertions, 0 deletions
diff --git a/opcodes/mep-asm.c b/opcodes/mep-asm.c new file mode 100644 index 0000000..66f20a7 --- /dev/null +++ b/opcodes/mep-asm.c @@ -0,0 +1,1398 @@ +/* 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 1996, 1997, 1998, 1999, 2000, 2001, 2005 + 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., + 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ + +/* ??? Eventually more and more of this stuff can go to cpu-independent files. + Keep that in mind. */ + +#include "sysdep.h" +#include <stdio.h> +#include "ansidecl.h" +#include "bfd.h" +#include "symcat.h" +#include "mep-desc.h" +#include "mep-opc.h" +#include "opintl.h" +#include "xregex.h" +#include "libiberty.h" +#include "safe-ctype.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 + (CGEN_CPU_DESC, const CGEN_INSN *, const char **, CGEN_FIELDS *); + +/* -- assembler routines inserted here. */ + +/* -- asm.c */ + +#define CGEN_VALIDATE_INSN_SUPPORTED + + const char * parse_csrn (CGEN_CPU_DESC, const char **, CGEN_KEYWORD *, long *); + const char * parse_tpreg (CGEN_CPU_DESC, const char **, CGEN_KEYWORD *, long *); + const char * parse_spreg (CGEN_CPU_DESC, const char **, CGEN_KEYWORD *, long *); + const char * parse_mep_align (CGEN_CPU_DESC, const char **, enum cgen_operand_type, long *); + const char * parse_mep_alignu (CGEN_CPU_DESC, const char **, enum cgen_operand_type, unsigned long *); +static const char * parse_signed16 (CGEN_CPU_DESC, const char **, int, long *); +static const char * parse_unsigned16 (CGEN_CPU_DESC, const char **, int, unsigned long *); +static const char * parse_lo16 (CGEN_CPU_DESC, const char **, int, long *, long); +static const char * parse_unsigned7 (CGEN_CPU_DESC, const char **, enum cgen_operand_type, unsigned long *); +static const char * parse_zero (CGEN_CPU_DESC, const char **, int, long *); + +const char * +parse_csrn (CGEN_CPU_DESC cd, const char **strp, + CGEN_KEYWORD *keyword_table, long *field) +{ + const char *err; + unsigned long value; + + err = cgen_parse_keyword (cd, strp, keyword_table, field); + if (!err) + return NULL; + + err = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CSRN_IDX, & value); + if (err) + return err; + *field = value; + return NULL; +} + +/* begin-cop-ip-parse-handlers */ +static const char * +parse_fmax_cr (CGEN_CPU_DESC cd, + const char **strp, + CGEN_KEYWORD *keyword_table ATTRIBUTE_UNUSED, + long *field) +{ + return cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_cr_fmax, field); +} +static const char * +parse_fmax_ccr (CGEN_CPU_DESC cd, + const char **strp, + CGEN_KEYWORD *keyword_table ATTRIBUTE_UNUSED, + long *field) +{ + return cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_fmax, field); +} +/* end-cop-ip-parse-handlers */ + +const char * +parse_tpreg (CGEN_CPU_DESC cd, const char ** strp, + CGEN_KEYWORD *keyword_table, long *field) +{ + const char *err; + + err = cgen_parse_keyword (cd, strp, keyword_table, field); + if (err) + return err; + if (*field != 13) + return _("Only $tp or $13 allowed for this opcode"); + return NULL; +} + +const char * +parse_spreg (CGEN_CPU_DESC cd, const char ** strp, + CGEN_KEYWORD *keyword_table, long *field) +{ + const char *err; + + err = cgen_parse_keyword (cd, strp, keyword_table, field); + if (err) + return err; + if (*field != 15) + return _("Only $sp or $15 allowed for this opcode"); + return NULL; +} + +const char * +parse_mep_align (CGEN_CPU_DESC cd, const char ** strp, + enum cgen_operand_type type, long *field) +{ + long lsbs = 0; + const char *err; + + switch (type) + { + case MEP_OPERAND_PCREL8A2: + case MEP_OPERAND_PCREL12A2: + case MEP_OPERAND_PCREL17A2: + case MEP_OPERAND_PCREL24A2: + case MEP_OPERAND_CDISP8A2: + case MEP_OPERAND_CDISP8A4: + case MEP_OPERAND_CDISP8A8: + err = cgen_parse_signed_integer (cd, strp, type, field); + break; + case MEP_OPERAND_PCABS24A2: + case MEP_OPERAND_UDISP7: + case MEP_OPERAND_UDISP7A2: + case MEP_OPERAND_UDISP7A4: + case MEP_OPERAND_UIMM7A4: + case MEP_OPERAND_ADDR24A4: + err = cgen_parse_unsigned_integer (cd, strp, type, (unsigned long *) field); + break; + default: + abort(); + } + if (err) + return err; + switch (type) + { + case MEP_OPERAND_UDISP7: + lsbs = 0; + break; + case MEP_OPERAND_PCREL8A2: + case MEP_OPERAND_PCREL12A2: + case MEP_OPERAND_PCREL17A2: + case MEP_OPERAND_PCREL24A2: + case MEP_OPERAND_PCABS24A2: + case MEP_OPERAND_UDISP7A2: + case MEP_OPERAND_CDISP8A2: + lsbs = *field & 1; + break; + case MEP_OPERAND_UDISP7A4: + case MEP_OPERAND_UIMM7A4: + case MEP_OPERAND_ADDR24A4: + case MEP_OPERAND_CDISP8A4: + lsbs = *field & 3; + break; + case MEP_OPERAND_CDISP8A8: + lsbs = *field & 7; + break; + default: + /* Safe assumption? */ + abort (); + } + if (lsbs) + return "Value is not aligned enough"; + return NULL; +} + +const char * +parse_mep_alignu (CGEN_CPU_DESC cd, const char ** strp, + enum cgen_operand_type type, unsigned long *field) +{ + return parse_mep_align (cd, strp, type, (long *) field); +} + + +/* Handle %lo(), %tpoff(), %sdaoff(), %hi(), and other signed + constants in a signed context. */ + +static const char * +parse_signed16 (CGEN_CPU_DESC cd, + const char **strp, + int opindex, + long *valuep) +{ + return parse_lo16 (cd, strp, opindex, valuep, 1); +} + +static const char * +parse_lo16 (CGEN_CPU_DESC cd, + const char **strp, + int opindex, + long *valuep, + long signedp) +{ + const char *errmsg; + enum cgen_parse_operand_result result_type; + bfd_vma value; + + if (strncasecmp (*strp, "%lo(", 4) == 0) + { + *strp += 4; + errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_LOW16, + & result_type, & value); + if (**strp != ')') + return _("missing `)'"); + ++*strp; + if (errmsg == NULL + && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) + value &= 0xffff; + if (signedp) + *valuep = (long)(short) value; + else + *valuep = value; + return errmsg; + } + + if (strncasecmp (*strp, "%hi(", 4) == 0) + { + *strp += 4; + errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_HI16S, + & result_type, & value); + if (**strp != ')') + return _("missing `)'"); + ++*strp; + if (errmsg == NULL + && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) + value = (value + 0x8000) >> 16; + *valuep = value; + return errmsg; + } + + if (strncasecmp (*strp, "%uhi(", 5) == 0) + { + *strp += 5; + errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_HI16U, + & result_type, & value); + if (**strp != ')') + return _("missing `)'"); + ++*strp; + if (errmsg == NULL + && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) + value = value >> 16; + *valuep = value; + return errmsg; + } + + if (strncasecmp (*strp, "%sdaoff(", 8) == 0) + { + *strp += 8; + errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_GPREL, + NULL, & value); + if (**strp != ')') + return _("missing `)'"); + ++*strp; + *valuep = value; + return errmsg; + } + + if (strncasecmp (*strp, "%tpoff(", 7) == 0) + { + *strp += 7; + errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_TPREL, + NULL, & value); + if (**strp != ')') + return _("missing `)'"); + ++*strp; + *valuep = value; + return errmsg; + } + + if (**strp == '%') + return _("invalid %function() here"); + + return cgen_parse_signed_integer (cd, strp, opindex, valuep); +} + +static const char * +parse_unsigned16 (CGEN_CPU_DESC cd, + const char **strp, + int opindex, + unsigned long *valuep) +{ + return parse_lo16 (cd, strp, opindex, (long *) valuep, 0); +} + +/* A special case of parse_signed16 which accepts only the value zero. */ + +static const char * +parse_zero (CGEN_CPU_DESC cd, const char **strp, int opindex, long *valuep) +{ + const char *errmsg; + enum cgen_parse_operand_result result_type; + bfd_vma value; + + /*fprintf(stderr, "dj: signed parse opindex `%s'\n", *strp);*/ + + /* Prevent ($ry) from being attempted as an expression on 'sw $rx,($ry)'. + It will fail and cause ry to be listed as an undefined symbol in the + listing. */ + if (strncmp (*strp, "($", 2) == 0) + return "not zero"; /* any string will do -- will never be seen. */ + + if (strncasecmp (*strp, "%lo(", 4) == 0) + { + *strp += 4; + errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_LOW16, + &result_type, &value); + if (**strp != ')') + return "missing `)'"; + ++*strp; + if (errmsg == NULL + && (result_type != CGEN_PARSE_OPERAND_RESULT_NUMBER || value != 0)) + return "not zero"; /* any string will do -- will never be seen. */ + *valuep = value; + return errmsg; + } + + if (strncasecmp (*strp, "%hi(", 4) == 0) + { + *strp += 4; + errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_HI16S, + &result_type, &value); + if (**strp != ')') + return "missing `)'"; + ++*strp; + if (errmsg == NULL + && (result_type != CGEN_PARSE_OPERAND_RESULT_NUMBER || value != 0)) + return "not zero"; /* any string will do -- will never be seen. */ + *valuep = value; + return errmsg; + } + + if (strncasecmp (*strp, "%uhi(", 5) == 0) + { + *strp += 5; + errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_HI16U, + &result_type, &value); + if (**strp != ')') + return "missing `)'"; + ++*strp; + if (errmsg == NULL + && (result_type != CGEN_PARSE_OPERAND_RESULT_NUMBER || value != 0)) + return "not zero"; /* any string will do -- will never be seen. */ + *valuep = value; + return errmsg; + } + + if (strncasecmp (*strp, "%sdaoff(", 8) == 0) + { + *strp += 8; + errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_GPREL, + &result_type, &value); + if (**strp != ')') + return "missing `)'"; + ++*strp; + if (errmsg == NULL + && (result_type != CGEN_PARSE_OPERAND_RESULT_NUMBER || value != 0)) + return "not zero"; /* any string will do -- will never be seen. */ + *valuep = value; + return errmsg; + } + + if (strncasecmp (*strp, "%tpoff(", 7) == 0) + { + *strp += 7; + errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_TPREL, + &result_type, &value); + if (**strp != ')') + return "missing `)'"; + ++*strp; + if (errmsg == NULL + && (result_type != CGEN_PARSE_OPERAND_RESULT_NUMBER || value != 0)) + return "not zero"; /* any string will do -- will never be seen. */ + *valuep = value; + return errmsg; + } + + if (**strp == '%') + return "invalid %function() here"; + + errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_NONE, + &result_type, &value); + if (errmsg == NULL + && (result_type != CGEN_PARSE_OPERAND_RESULT_NUMBER || value != 0)) + return "not zero"; /* any string will do -- will never be seen. */ + + return errmsg; +} + +static const char * +parse_unsigned7 (CGEN_CPU_DESC cd, const char **strp, + enum cgen_operand_type opindex, unsigned long *valuep) +{ + const char *errmsg; + bfd_vma value; + + /* fprintf(stderr, "dj: unsigned7 parse `%s'\n", *strp); */ + + if (strncasecmp (*strp, "%tpoff(", 7) == 0) + { + int reloc; + *strp += 7; + switch (opindex) + { + case MEP_OPERAND_UDISP7: + reloc = BFD_RELOC_MEP_TPREL7; + break; + case MEP_OPERAND_UDISP7A2: + reloc = BFD_RELOC_MEP_TPREL7A2; + break; + case MEP_OPERAND_UDISP7A4: + reloc = BFD_RELOC_MEP_TPREL7A4; + break; + default: + /* Safe assumption? */ + abort (); + } + errmsg = cgen_parse_address (cd, strp, opindex, reloc, + NULL, &value); + if (**strp != ')') + return "missing `)'"; + ++*strp; + *valuep = value; + return errmsg; + } + + if (**strp == '%') + return _("invalid %function() here"); + + return parse_mep_alignu (cd, strp, opindex, valuep); +} + +/* BEGIN LIGHTWEIGHT MACRO PROCESSOR. */ + +#define MAXARGS 9 + +typedef struct +{ + char *name; + char *expansion; +} macro; + +typedef struct +{ + const char *start; + int len; +} arg; + +macro macros[] = +{ + { "sizeof", "(`1.end + (- `1))"}, + { "startof", "(`1 | 0)" }, + { "align4", "(`1&(~3))"}, +/*{ "hi", "(((`1+0x8000)>>16) & 0xffff)" }, */ +/*{ "lo", "(`1 & 0xffff)" }, */ +/*{ "sdaoff", "((`1-__sdabase) & 0x7f)"}, */ +/*{ "tpoff", "((`1-__tpbase) & 0x7f)"}, */ + { 0,0 } +}; + +static char * expand_string (const char *, int); + +static const char * +mep_cgen_expand_macros_and_parse_operand + (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *); + +static char * +str_append (char *dest, const char *input, int len) +{ + char *new_dest; + int oldlen; + + if (len == 0) + return dest; + /* printf("str_append: <<%s>>, <<%s>>, %d\n", dest, input, len); */ + oldlen = (dest ? strlen(dest) : 0); + new_dest = realloc (dest, oldlen + len + 1); + memset (new_dest + oldlen, 0, len + 1); + return strncat (new_dest, input, len); +} + +static macro * +lookup_macro (const char *name) +{ + macro *m; + + for (m = macros; m->name; ++m) + if (strncmp (m->name, name, strlen(m->name)) == 0) + return m; + + return 0; +} + +static char * +expand_macro (arg *args, int narg, macro *mac) +{ + char *result = 0, *rescanned_result = 0; + char *e = mac->expansion; + char *mark = e; + int arg = 0; + + /* printf("expanding macro %s with %d args\n", mac->name, narg + 1); */ + while (*e) + { + if (*e == '`' && + (*e+1) && + ((*(e + 1) - '1') <= MAXARGS) && + ((*(e + 1) - '1') <= narg)) + { + result = str_append (result, mark, e - mark); + arg = (*(e + 1) - '1'); + /* printf("replacing `%d with %s\n", arg+1, args[arg].start); */ + result = str_append (result, args[arg].start, args[arg].len); + ++e; + mark = e+1; + } + ++e; + } + + if (mark != e) + result = str_append (result, mark, e - mark); + + if (result) + { + rescanned_result = expand_string (result, 0); + free (result); + return rescanned_result; + } + else + return result; +} + +#define IN_TEXT 0 +#define IN_ARGS 1 + +static char * +expand_string (const char *in, int first_only) +{ + int num_expansions = 0; + int depth = 0; + int narg = -1; + arg args[MAXARGS]; + int state = IN_TEXT; + const char *mark = in; + macro *macro = 0; + + char *expansion = 0; + char *result = 0; + + while (*in) + { + switch (state) + { + case IN_TEXT: + if (*in == '%' && *(in + 1) && (!first_only || num_expansions == 0)) + { + macro = lookup_macro (in + 1); + if (macro) + { + /* printf("entering state %d at '%s'...\n", state, in); */ + result = str_append (result, mark, in - mark); + mark = in; + in += 1 + strlen (macro->name); + while (*in == ' ') ++in; + if (*in != '(') + { + state = IN_TEXT; + macro = 0; + } + else + { + state = IN_ARGS; + narg = 0; + args[narg].start = in + 1; + args[narg].len = 0; + mark = in + 1; + } + } + } + break; + case IN_ARGS: + if (depth == 0) + { + switch (*in) + { + case ',': + narg++; + args[narg].start = (in + 1); + args[narg].len = 0; + break; + case ')': + state = IN_TEXT; + /* printf("entering state %d at '%s'...\n", state, in); */ + if (macro) + { + expansion = 0; + expansion = expand_macro (args, narg, macro); + num_expansions++; + if (expansion) + { + result = str_append (result, expansion, strlen (expansion)); + free (expansion); + } + } + else + { + result = str_append (result, mark, in - mark); + } + macro = 0; + mark = in + 1; + break; + case '(': + depth++; + default: + args[narg].len++; + break; + } + } + else + { + if (*in == ')') + depth--; + if (narg > -1) + args[narg].len++; + } + + } + ++in; + } + + if (mark != in) + result = str_append (result, mark, in - mark); + + return result; +} + +#undef IN_ARGS +#undef IN_TEXT +#undef MAXARGS + + +/* END LIGHTWEIGHT MACRO PROCESSOR. */ + +const char * mep_cgen_parse_operand + (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *); + +const char * +mep_cgen_expand_macros_and_parse_operand (CGEN_CPU_DESC cd, int opindex, + const char ** strp_in, CGEN_FIELDS * fields) +{ + const char * errmsg = NULL; + char *str = 0, *hold = 0; + const char **strp = 0; + + /* Set up a new pointer to macro-expanded string. */ + str = expand_string (*strp_in, 1); + /* fprintf (stderr, " expanded <<%s>> to <<%s>>\n", *strp_in, str); */ + + hold = str; + strp = (const char **)(&str); + + errmsg = mep_cgen_parse_operand (cd, opindex, strp, fields); + + /* Now work out the advance. */ + if (strlen (str) == 0) + *strp_in += strlen (*strp_in); + + else + { + if (strstr (*strp_in, str)) + /* A macro-expansion was pulled off the front. */ + *strp_in = strstr (*strp_in, str); + else + /* A non-macro-expansion was pulled off the front. */ + *strp_in += (str - hold); + } + + if (hold) + free (hold); + + return errmsg; +} + +#define CGEN_ASM_INIT_HOOK (cd->parse_operand = mep_cgen_expand_macros_and_parse_operand); + +/* -- dis.c */ + +const char * mep_cgen_parse_operand + (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *); + +/* 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 * +mep_cgen_parse_operand (CGEN_CPU_DESC cd, + int opindex, + const char ** strp, + CGEN_FIELDS * fields) +{ + const char * errmsg = NULL; + /* Used by scalar operands that still need to be parsed. */ + long junk ATTRIBUTE_UNUSED; + + switch (opindex) + { + case MEP_OPERAND_ADDR24A4 : + errmsg = parse_mep_alignu (cd, strp, MEP_OPERAND_ADDR24A4, (unsigned long *) (& fields->f_24u8a4n)); + break; + case MEP_OPERAND_CALLNUM : + errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CALLNUM, (unsigned long *) (& fields->f_callnum)); + break; + case MEP_OPERAND_CCCC : + errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CCCC, (unsigned long *) (& fields->f_rm)); + break; + case MEP_OPERAND_CCRN : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr, & fields->f_ccrn); + break; + case MEP_OPERAND_CDISP8 : + errmsg = cgen_parse_signed_integer (cd, strp, MEP_OPERAND_CDISP8, (long *) (& fields->f_8s24)); + break; + case MEP_OPERAND_CDISP8A2 : + errmsg = parse_mep_align (cd, strp, MEP_OPERAND_CDISP8A2, (long *) (& fields->f_8s24a2)); + break; + case MEP_OPERAND_CDISP8A4 : + errmsg = parse_mep_align (cd, strp, MEP_OPERAND_CDISP8A4, (long *) (& fields->f_8s24a4)); + break; + case MEP_OPERAND_CDISP8A8 : + errmsg = parse_mep_align (cd, strp, MEP_OPERAND_CDISP8A8, (long *) (& fields->f_8s24a8)); + break; + case MEP_OPERAND_CIMM4 : + errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CIMM4, (unsigned long *) (& fields->f_rn)); + break; + case MEP_OPERAND_CIMM5 : + errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CIMM5, (unsigned long *) (& fields->f_5u24)); + break; + case MEP_OPERAND_CODE16 : + errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CODE16, (unsigned long *) (& fields->f_16u16)); + break; + case MEP_OPERAND_CODE24 : + errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CODE24, (unsigned long *) (& fields->f_24u4n)); + break; + case MEP_OPERAND_CP_FLAG : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr, & junk); + break; + case MEP_OPERAND_CRN : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_cr, & fields->f_crn); + break; + case MEP_OPERAND_CRN64 : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_cr64, & fields->f_crn); + break; + case MEP_OPERAND_CRNX : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_cr, & fields->f_crnx); + break; + case MEP_OPERAND_CRNX64 : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_cr64, & fields->f_crnx); + break; + case MEP_OPERAND_CSRN : + errmsg = parse_csrn (cd, strp, & mep_cgen_opval_h_csr, & fields->f_csrn); + break; + case MEP_OPERAND_CSRN_IDX : + errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CSRN_IDX, (unsigned long *) (& fields->f_csrn)); + break; + case MEP_OPERAND_DBG : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); + break; + case MEP_OPERAND_DEPC : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); + break; + case MEP_OPERAND_EPC : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); + break; + case MEP_OPERAND_EXC : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); + break; + case MEP_OPERAND_FMAX_CCRN : + errmsg = parse_fmax_ccr (cd, strp, & mep_cgen_opval_h_ccr, & fields->f_fmax_4_4); + break; + case MEP_OPERAND_FMAX_FRD : + errmsg = parse_fmax_cr (cd, strp, & mep_cgen_opval_h_cr, & fields->f_fmax_frd); + break; + case MEP_OPERAND_FMAX_FRD_INT : + errmsg = parse_fmax_cr (cd, strp, & mep_cgen_opval_h_cr, & fields->f_fmax_frd); + break; + case MEP_OPERAND_FMAX_FRM : + errmsg = parse_fmax_cr (cd, strp, & mep_cgen_opval_h_cr, & fields->f_fmax_frm); + break; + case MEP_OPERAND_FMAX_FRN : + errmsg = parse_fmax_cr (cd, strp, & mep_cgen_opval_h_cr, & fields->f_fmax_frn); + break; + case MEP_OPERAND_FMAX_FRN_INT : + errmsg = parse_fmax_cr (cd, strp, & mep_cgen_opval_h_cr, & fields->f_fmax_frn); + break; + case MEP_OPERAND_FMAX_RM : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_fmax_rm); + break; + case MEP_OPERAND_HI : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); + break; + case MEP_OPERAND_LO : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); + break; + case MEP_OPERAND_LP : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); + break; + case MEP_OPERAND_MB0 : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); + break; + case MEP_OPERAND_MB1 : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); + break; + case MEP_OPERAND_ME0 : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); + break; + case MEP_OPERAND_ME1 : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); + break; + case MEP_OPERAND_NPC : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); + break; + case MEP_OPERAND_OPT : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); + break; + case MEP_OPERAND_PCABS24A2 : + errmsg = parse_mep_alignu (cd, strp, MEP_OPERAND_PCABS24A2, (unsigned long *) (& fields->f_24u5a2n)); + break; + case MEP_OPERAND_PCREL12A2 : + errmsg = parse_mep_align (cd, strp, MEP_OPERAND_PCREL12A2, (long *) (& fields->f_12s4a2)); + break; + case MEP_OPERAND_PCREL17A2 : + errmsg = parse_mep_align (cd, strp, MEP_OPERAND_PCREL17A2, (long *) (& fields->f_17s16a2)); + break; + case MEP_OPERAND_PCREL24A2 : + errmsg = parse_mep_align (cd, strp, MEP_OPERAND_PCREL24A2, (long *) (& fields->f_24s5a2n)); + break; + case MEP_OPERAND_PCREL8A2 : + errmsg = parse_mep_align (cd, strp, MEP_OPERAND_PCREL8A2, (long *) (& fields->f_8s8a2)); + break; + case MEP_OPERAND_PSW : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); + break; + case MEP_OPERAND_R0 : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & junk); + break; + case MEP_OPERAND_R1 : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & junk); + break; + case MEP_OPERAND_RL : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rl); + break; + case MEP_OPERAND_RM : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rm); + break; + case MEP_OPERAND_RMA : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rm); + break; + case MEP_OPERAND_RN : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn); + break; + case MEP_OPERAND_RN3 : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn3); + break; + case MEP_OPERAND_RN3C : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn3); + break; + case MEP_OPERAND_RN3L : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn3); + break; + case MEP_OPERAND_RN3S : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn3); + break; + case MEP_OPERAND_RN3UC : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn3); + break; + case MEP_OPERAND_RN3UL : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn3); + break; + case MEP_OPERAND_RN3US : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn3); + break; + case MEP_OPERAND_RNC : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn); + break; + case MEP_OPERAND_RNL : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn); + break; + case MEP_OPERAND_RNS : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn); + break; + case MEP_OPERAND_RNUC : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn); + break; + case MEP_OPERAND_RNUL : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn); + break; + case MEP_OPERAND_RNUS : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn); + break; + case MEP_OPERAND_SAR : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); + break; + case MEP_OPERAND_SDISP16 : + errmsg = parse_signed16 (cd, strp, MEP_OPERAND_SDISP16, (long *) (& fields->f_16s16)); + break; + case MEP_OPERAND_SIMM16 : + errmsg = parse_signed16 (cd, strp, MEP_OPERAND_SIMM16, (long *) (& fields->f_16s16)); + break; + case MEP_OPERAND_SIMM6 : + errmsg = cgen_parse_signed_integer (cd, strp, MEP_OPERAND_SIMM6, (long *) (& fields->f_6s8)); + break; + case MEP_OPERAND_SIMM8 : + errmsg = cgen_parse_signed_integer (cd, strp, MEP_OPERAND_SIMM8, (long *) (& fields->f_8s8)); + break; + case MEP_OPERAND_SP : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & junk); + break; + case MEP_OPERAND_SPR : + errmsg = parse_spreg (cd, strp, & mep_cgen_opval_h_gpr, & junk); + break; + case MEP_OPERAND_TP : + errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & junk); + break; + case MEP_OPERAND_TPR : + errmsg = parse_tpreg (cd, strp, & mep_cgen_opval_h_gpr, & junk); + break; + case MEP_OPERAND_UDISP2 : + errmsg = cgen_parse_signed_integer (cd, strp, MEP_OPERAND_UDISP2, (long *) (& fields->f_2u6)); + break; + case MEP_OPERAND_UDISP7 : + errmsg = parse_unsigned7 (cd, strp, MEP_OPERAND_UDISP7, (unsigned long *) (& fields->f_7u9)); + break; + case MEP_OPERAND_UDISP7A2 : + errmsg = parse_unsigned7 (cd, strp, MEP_OPERAND_UDISP7A2, (unsigned long *) (& fields->f_7u9a2)); + break; + case MEP_OPERAND_UDISP7A4 : + errmsg = parse_unsigned7 (cd, strp, MEP_OPERAND_UDISP7A4, (unsigned long *) (& fields->f_7u9a4)); + break; + case MEP_OPERAND_UIMM16 : + errmsg = parse_unsigned16 (cd, strp, MEP_OPERAND_UIMM16, (unsigned long *) (& fields->f_16u16)); + break; + case MEP_OPERAND_UIMM2 : + errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_UIMM2, (unsigned long *) (& fields->f_2u10)); + break; + case MEP_OPERAND_UIMM24 : + errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_UIMM24, (unsigned long *) (& fields->f_24u8n)); + break; + case MEP_OPERAND_UIMM3 : + errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_UIMM3, (unsigned long *) (& fields->f_3u5)); + break; + case MEP_OPERAND_UIMM4 : + errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_UIMM4, (unsigned long *) (& fields->f_4u8)); + break; + case MEP_OPERAND_UIMM5 : + errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_UIMM5, (unsigned long *) (& fields->f_5u8)); + break; + case MEP_OPERAND_UIMM7A4 : + errmsg = parse_mep_alignu (cd, strp, MEP_OPERAND_UIMM7A4, (unsigned long *) (& fields->f_7u9a4)); + break; + case MEP_OPERAND_ZERO : + errmsg = parse_zero (cd, strp, MEP_OPERAND_ZERO, (long *) (& junk)); + break; + + default : + /* xgettext:c-format */ + fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex); + abort (); + } + + return errmsg; +} + +cgen_parse_fn * const mep_cgen_parse_handlers[] = +{ + parse_insn_normal, +}; + +void +mep_cgen_init_asm (CGEN_CPU_DESC cd) +{ + mep_cgen_init_opcode_table (cd); + mep_cgen_init_ibld_table (cd); + cd->parse_handlers = & mep_cgen_parse_handlers[0]; + cd->parse_operand = mep_cgen_parse_operand; +#ifdef CGEN_ASM_INIT_HOOK +CGEN_ASM_INIT_HOOK +#endif +} + + + +/* Regex construction routine. + + This translates an opcode syntax string into a regex string, + by replacing any non-character syntax element (such as an + opcode) with the pattern '.*' + + It then compiles the regex and stores it in the opcode, for + later use by mep_cgen_assemble_insn + + Returns NULL for success, an error message for failure. */ + +char * +mep_cgen_build_insn_regex (CGEN_INSN *insn) +{ + CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn); + const char *mnem = CGEN_INSN_MNEMONIC (insn); + char rxbuf[CGEN_MAX_RX_ELEMENTS]; + char *rx = rxbuf; + const CGEN_SYNTAX_CHAR_TYPE *syn; + int reg_err; + + syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc)); + + /* Mnemonics come first in the syntax string. */ + if (! CGEN_SYNTAX_MNEMONIC_P (* syn)) + return _("missing mnemonic in syntax string"); + ++syn; + + /* Generate a case sensitive regular expression that emulates case + insensitive matching in the "C" locale. We cannot generate a case + insensitive regular expression because in Turkish locales, 'i' and 'I' + are not equal modulo case conversion. */ + + /* Copy the literal mnemonic out of the insn. */ + for (; *mnem; mnem++) + { + char c = *mnem; + + if (ISALPHA (c)) + { + *rx++ = '['; + *rx++ = TOLOWER (c); + *rx++ = TOUPPER (c); + *rx++ = ']'; + } + else + *rx++ = c; + } + + /* Copy any remaining literals from the syntax string into the rx. */ + for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn) + { + if (CGEN_SYNTAX_CHAR_P (* syn)) + { + char c = CGEN_SYNTAX_CHAR (* syn); + + switch (c) + { + /* Escape any regex metacharacters in the syntax. */ + case '.': case '[': case '\\': + case '*': case '^': case '$': + +#ifdef CGEN_ESCAPE_EXTENDED_REGEX + case '?': case '{': case '}': + case '(': case ')': case '*': + case '|': case '+': case ']': +#endif + *rx++ = '\\'; + *rx++ = c; + break; + + default: + if (ISALPHA (c)) + { + *rx++ = '['; + *rx++ = TOLOWER (c); + *rx++ = TOUPPER (c); + *rx++ = ']'; + } + else + *rx++ = c; + break; + } + } + else + { + /* Replace non-syntax fields with globs. */ + *rx++ = '.'; + *rx++ = '*'; + } + } + + /* Trailing whitespace ok. */ + * rx++ = '['; + * rx++ = ' '; + * rx++ = '\t'; + * rx++ = ']'; + * rx++ = '*'; + + /* But anchor it after that. */ + * rx++ = '$'; + * rx = '\0'; + + CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t)); + reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB); + + if (reg_err == 0) + return NULL; + else + { + static char msg[80]; + + regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80); + regfree ((regex_t *) CGEN_INSN_RX (insn)); + free (CGEN_INSN_RX (insn)); + (CGEN_INSN_RX (insn)) = NULL; + return msg; + } +} + + +/* 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 (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 CGEN_SYNTAX_CHAR_TYPE * 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) + return _("unrecognized instruction"); + +#ifndef CGEN_MNEMONIC_OPERANDS + if (* str && ! ISSPACE (* str)) + return _("unrecognized instruction"); +#endif + + 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)) + { + /* FIXME: While we allow for non-GAS callers above, we assume the + first char after the mnemonic part is a space. */ + /* FIXME: We also take inappropriate advantage of the fact that + GAS's input scrubber will remove extraneous blanks. */ + if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn))) + { +#ifdef CGEN_MNEMONIC_OPERANDS + if (CGEN_SYNTAX_CHAR(* syn) == ' ') + past_opcode_p = 1; +#endif + ++ syn; + ++ str; + } + else if (*str) + { + /* Syntax char didn't match. Can't be this insn. */ + static char msg [80]; + + /* xgettext:c-format */ + sprintf (msg, _("syntax error (expected char `%c', found `%c')"), + CGEN_SYNTAX_CHAR(*syn), *str); + return msg; + } + else + { + /* Ran out of input. */ + static char msg [80]; + + /* xgettext:c-format */ + sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"), + CGEN_SYNTAX_CHAR(*syn)); + return msg; + } + continue; + } + + /* We have an operand of some sort. */ + errmsg = cd->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 * +mep_cgen_assemble_insn (CGEN_CPU_DESC cd, + const char *str, + CGEN_FIELDS *fields, + CGEN_INSN_BYTES_PTR buf, + char **errmsg) +{ + const char *start; + CGEN_INSN_LIST *ilist; + const char *parse_errmsg = NULL; + const char *insert_errmsg = NULL; + int recognized_mnemonic = 0; + + /* 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; + recognized_mnemonic = 1; + +#ifdef CGEN_VALIDATE_INSN_SUPPORTED + /* Not usually needed as unsupported opcodes + shouldn't be in the hash lists. */ + /* Is this insn supported by the selected cpu? */ + if (! mep_cgen_insn_supported (cd, insn)) + continue; +#endif + /* If the RELAXED 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_RELAXED) != 0) + continue; + + str = start; + + /* Skip this insn if str doesn't look right lexically. */ + if (CGEN_INSN_RX (insn) != NULL && + regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH) + continue; + + /* Allow parse/insert handlers to obtain length of insn. */ + CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn); + + parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields); + if (parse_errmsg != NULL) + continue; + + /* ??? 0 is passed for `pc'. */ + insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf, + (bfd_vma) 0); + if (insert_errmsg != NULL) + continue; + + /* It is up to the caller to actually output the insn and any + queued relocs. */ + return insn; + } + + { + static char errbuf[150]; +#ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS + const char *tmp_errmsg; + + /* If requesting verbose error messages, use insert_errmsg. + Failing that, use parse_errmsg. */ + tmp_errmsg = (insert_errmsg ? insert_errmsg : + parse_errmsg ? parse_errmsg : + recognized_mnemonic ? + _("unrecognized form of instruction") : + _("unrecognized instruction")); + + if (strlen (start) > 50) + /* xgettext:c-format */ + sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start); + else + /* xgettext:c-format */ + sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start); +#else + if (strlen (start) > 50) + /* xgettext:c-format */ + sprintf (errbuf, _("bad instruction `%.50s...'"), start); + else + /* xgettext:c-format */ + sprintf (errbuf, _("bad instruction `%.50s'"), start); +#endif + + *errmsg = errbuf; + return NULL; + } +} |