/* Assembler interface for targets using CGEN. -*- C -*-
CGEN: Cpu tools GENerator
-This file is used to generate @arch@-asm.c.
+THIS FILE IS MACHINE GENERATED WITH CGEN.
+- the resultant file is machine generated, cgen-asm.in isn't
-Copyright (C) 1996, 1997 Free Software Foundation, Inc.
+Copyright 1996, 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
This file is part of the GNU Binutils and GDB, the GNU debugger.
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. */
+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 "@arch@-opc.h"
+#include "symcat.h"
+#include "@prefix@-desc.h"
+#include "@prefix@-opc.h"
+#include "opintl.h"
+#include "xregex.h"
-/* ??? The layout of this stuff is still work in progress.
- For speed in assembly/disassembly, we use inline functions. That of course
- will only work for GCC. When this stuff is finished, we can decide whether
- to keep the inline functions (and only get the performance increase when
- compiled with GCC), or switch to macros, or use something else.
-*/
+#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 ((const CGEN_INSN *, const char **, CGEN_FIELDS *));
-static void insert_insn_normal
- PARAMS ((const CGEN_INSN *, CGEN_FIELDS *, cgen_insn_t *));
+static const char * parse_insn_normal
+ PARAMS ((CGEN_CPU_DESC, const CGEN_INSN *, const char **, CGEN_FIELDS *));
+\f
+/* -- assembler routines inserted here */
\f
-/* Default insertion routine.
-
- SHIFT is negative for left shifts, positive for right shifts.
- All bits of VALUE to be inserted must be valid as we don't handle
- signed vs unsigned shifts.
-
- ATTRS is a mask of the boolean attributes. We don't need any at the
- moment, but for consistency with extract_normal we have them. */
-
-/* FIXME: This duplicates functionality with bfd's howto table and
- bfd_install_relocation. */
-/* FIXME: For architectures where insns can be representable as ints,
- store insn in `field' struct and add registers, etc. while parsing. */
-
-static CGEN_INLINE void
-insert_normal (value, attrs, start, length, shift, total_length, buffer)
- long value;
- unsigned int attrs;
- int start, length, shift, total_length;
- char *buffer;
-{
- bfd_vma x;
-#if 0 /*def CGEN_INT_INSN*/
- *buffer |= ((value & ((1 << length) - 1))
- << (total_length - (start + length)));
-#else
- switch (total_length)
+/*
+ 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 @arch@_cgen_assemble_insn
+
+ returns NULL for success, an error message for failure
+*/
+
+char *
+@arch@_cgen_build_insn_regex (insn)
+ CGEN_INSN *insn;
+{
+ CGEN_OPCODE *opc = CGEN_INSN_OPCODE (insn);
+ const char *mnem = CGEN_INSN_MNEMONIC (insn);
+ int mnem_len;
+ 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;
+
+ /* copy the literal mnemonic out of the insn */
+ memset (rx, 0, CGEN_MAX_RX_ELEMENTS);
+ mnem_len = strlen(mnem);
+ memcpy (rx, mnem, mnem_len);
+ rx += mnem_len;
+
+ /* copy any remaining literals from the syntax string into the rx */
+ for(; * syn != 0 && rx < rxbuf + (CGEN_MAX_RX_ELEMENTS - 9); ++syn, ++rx)
{
- case 8:
- x = *(unsigned char *) buffer;
- break;
- case 16:
- if (CGEN_CURRENT_ENDIAN == CGEN_ENDIAN_BIG)
- x = bfd_getb16 (buffer);
- else
- x = bfd_getl16 (buffer);
- break;
- case 32:
- if (CGEN_CURRENT_ENDIAN == CGEN_ENDIAN_BIG)
- x = bfd_getb32 (buffer);
+ if (CGEN_SYNTAX_CHAR_P (* syn))
+ {
+ char tmp = CGEN_SYNTAX_CHAR (* syn);
+ switch (tmp)
+ {
+ /* escape any regex metacharacters in the syntax */
+ case '.': case '[': case '\\':
+ case '*': case '^': case '$':
+
+#ifdef CGEN_ESCAPE_EXTENDED_REGEX
+ case '?': case '{': case '}':
+ case '(': case ')': case '*':
+ case '|': case '+': case ']':
+#endif
+
+ * rx++ = '\\';
+ break;
+ }
+ /* insert syntax char into rx */
+ * rx = tmp;
+ }
else
- x = bfd_getl32 (buffer);
- break;
- default :
- abort ();
+ {
+ /* replace non-syntax fields with globs */
+ * rx = '.';
+ * ++rx = '*';
+ }
}
- if (shift < 0)
- value <<= -shift;
- else
- value >>= shift;
+ /* trailing whitespace ok */
+ * rx++ = '[';
+ * rx++ = ' ';
+ * rx++ = '\t';
+ * rx++ = ']';
+ * rx++ = '*';
+
+ /* but anchor it after that */
+ * rx++ = '$';
+ * rx = '\0';
- x |= ((value & ((1 << length) - 1))
- << (total_length - (start + length)));
+ CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t));
+ reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB|REG_ICASE);
- switch (total_length)
+ if (reg_err == 0)
+ return NULL;
+ else
{
- case 8:
- *buffer = value;
- break;
- case 16:
- if (CGEN_CURRENT_ENDIAN == CGEN_ENDIAN_BIG)
- bfd_putb16 (x, buffer);
- else
- bfd_putl16 (x, buffer);
- break;
- case 32:
- if (CGEN_CURRENT_ENDIAN == CGEN_ENDIAN_BIG)
- bfd_putb32 (x, buffer);
- else
- bfd_putl32 (x, buffer);
- break;
- default :
- abort ();
+ 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;
}
-#endif
}
-\f
-/* -- assembler routines inserted here */
+
\f
/* Default insn parser.
*/
static const char *
-parse_insn_normal (insn, strp, fields)
+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;
+ 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. */
+ 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 && *p == *str)
+ while (*p && tolower (*p) == tolower (*str))
++p, ++str;
- if (*p || (*str && !isspace (*str)))
- return "unrecognized instruction";
- CGEN_INIT_PARSE ();
- cgen_init_parse_operand ();
+ 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 (CGEN_INSN_SYNTAX (insn));
+ syn = CGEN_SYNTAX_STRING (syntax);
+
/* Mnemonics come first for now, ensure valid string. */
- if (! CGEN_SYNTAX_MNEMONIC_P (*syn))
+ if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
abort ();
+
++syn;
- while (*syn != 0)
+
+ while (* syn != 0)
{
/* Non operand chars must match exactly. */
- /* FIXME: Need to better handle whitespace. */
- if (CGEN_SYNTAX_CHAR_P (*syn))
+ if (CGEN_SYNTAX_CHAR_P (* syn))
{
- if (*str == CGEN_SYNTAX_CHAR (*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 (*syn == ' ')
+ if (CGEN_SYNTAX_CHAR(* syn) == ' ')
past_opcode_p = 1;
#endif
- ++syn;
- ++str;
+ ++ syn;
+ ++ str;
}
- else
+ else if (*str)
{
/* Syntax char didn't match. Can't be this insn. */
- /* FIXME: would like to return "expected char `c'" */
- return "syntax error";
+ 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 = @arch@_cgen_parse_operand (CGEN_SYNTAX_FIELD (*syn),
- &str, fields);
+ errmsg = @arch@_cgen_parse_operand (cd, CGEN_SYNTAX_FIELD (*syn),
+ &str, fields);
if (errmsg)
return errmsg;
/* Done with this operand, continue with next one. */
- ++syn;
+ ++ syn;
}
/* If we're at the end of the syntax string, we're done. */
- if (*syn == '\0')
+ 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;
+ while (isspace (* str))
+ ++ str;
- if (*str != '\0')
- return "junk at end of line"; /* FIXME: would like to include `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";
-}
-
-/* Default insn builder (insert handler).
- The instruction is recorded in target byte order. */
-
-static void
-insert_insn_normal (insn, fields, buffer)
- const CGEN_INSN *insn;
- CGEN_FIELDS *fields;
- cgen_insn_t *buffer;
-{
- const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
- bfd_vma value;
- const unsigned char *syn;
-
- CGEN_INIT_INSERT ();
- value = CGEN_INSN_VALUE (insn);
-
- /* If we're recording insns as numbers (rather than a string of bytes),
- target byte order handling is deferred until later. */
-#undef min
-#define min(a,b) ((a) < (b) ? (a) : (b))
-#if 0 /*def CGEN_INT_INSN*/
- *buffer = value;
-#else
- switch (min (CGEN_BASE_INSN_BITSIZE, CGEN_FIELDS_BITSIZE (fields)))
- {
- case 8:
- *buffer = value;
- break;
- case 16:
- if (CGEN_CURRENT_ENDIAN == CGEN_ENDIAN_BIG)
- bfd_putb16 (value, (char *) buffer);
- else
- bfd_putl16 (value, (char *) buffer);
- break;
- case 32:
- if (CGEN_CURRENT_ENDIAN == CGEN_ENDIAN_BIG)
- bfd_putb32 (value, (char *) buffer);
- else
- bfd_putl32 (value, (char *) buffer);
- break;
- default:
- abort ();
- }
-#endif
-
- /* ??? Rather than scanning the syntax string again, we could store
- in `fields' a null terminated list of the fields that are present. */
-
- for (syn = CGEN_SYNTAX_STRING (syntax); *syn != '\0'; ++syn)
- {
- if (CGEN_SYNTAX_CHAR_P (*syn))
- continue;
-
- @arch@_cgen_insert_operand (CGEN_SYNTAX_FIELD (*syn), fields, buffer);
- }
+ return _("unrecognized instruction");
}
\f
/* 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). */
+ 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 *
-@arch@_cgen_assemble_insn (str, fields, buf, errmsg)
+@arch@_cgen_assemble_insn (cd, str, fields, buf, errmsg)
+ CGEN_CPU_DESC cd;
const char *str;
CGEN_FIELDS *fields;
- cgen_insn_t *buf;
+ 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;
+ while (isspace (* str))
+ ++ str;
/* The instructions are stored in hashed lists.
Get the first in the list. */
- ilist = CGEN_ASM_LOOKUP_INSN (str);
+ ilist = CGEN_ASM_LOOKUP_INSN (cd, str);
/* Keep looking until we find a match. */
for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist))
{
const CGEN_INSN *insn = ilist->insn;
+ recognized_mnemonic = 1;
-#if 0 /* not needed as unsupported opcodes shouldn't be in the hash lists */
+#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 (! @arch@_cgen_insn_supported (insn))
+ if (! @arch@_cgen_insn_supported (cd, insn))
continue;
#endif
-#if 1 /* FIXME: wip */
/* 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 (insn, CGEN_INSN_RELAX) != 0)
+ if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAX) != 0)
continue;
-#endif
str = start;
- /* Record a default length for the insn. This will get set to the
- correct value while parsing. */
- /* FIXME: wip */
+ /* 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);
- /* ??? The extent to which moving the parse and insert handlers into
- this function (thus removing the function call) will speed things up
- is unclear. The simplicity and flexibility of the current scheme is
- appropriate for now. One could have the best of both worlds with
- inline functions but of course that would only work for gcc. Since
- we're machine generating some code we could do that here too. Maybe
- later. */
- if (! (*CGEN_PARSE_FN (insn)) (insn, &str, fields))
- {
- (*CGEN_INSERT_FN (insn)) (insn, fields, buf);
- /* It is up to the caller to actually output the insn and any
- queued relocs. */
- return 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;
- /* Try the next entry. */
+ /* It is up to the caller to actually output the insn and any
+ queued relocs. */
+ return insn;
}
- /* 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];
- sprintf (errbuf, "bad instruction `%.50s%s'",
- start, strlen (start) > 50 ? "..." : "");
+ 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;
}
FIXME: Not currently used. */
void
-@arch@_cgen_asm_hash_keywords (opvals)
+@arch@_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;
+ const CGEN_KEYWORD_ENTRY * ke;
- while ((ke = cgen_keyword_search_next (&search)) != NULL)
+ while ((ke = cgen_keyword_search_next (& search)) != NULL)
{
#if 0 /* Unnecessary, should be done in the search routine. */
if (! @arch@_cgen_opval_supported (ke))
continue;
#endif
- cgen_asm_record_register (ke->name, ke->value);
+ cgen_asm_record_register (cd, ke->name, ke->value);
}
}
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