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authorDave Brolley <brolley@redhat.com>2007-02-05 20:04:22 +0000
committerDave Brolley <brolley@redhat.com>2007-02-05 20:04:22 +0000
commitbd2f2e55ad54541340e5ea415f1aba65aa80717e (patch)
tree6d992109e7618b96e71a48766987f0c82c577629 /opcodes/mep-asm.c
parentb5057acde36b5a9a52e1505a29091ec17c0b6ac5 (diff)
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2007-02-05 Dave Brolley <brolley@redhat.com>
* mep-*: New support for Toshiba Media Processor (MeP). * Makefile.am: Add support for MeP. * configure.in: Likewise. * disassemble.c: Likewise. * Makefile.in: Regenerated. * configure: Regenerated.
Diffstat (limited to 'opcodes/mep-asm.c')
-rw-r--r--opcodes/mep-asm.c1398
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;
+ }
+}