/* Assembler interface for targets using CGEN. -*- C -*-
CGEN: Cpu tools GENerator
-THIS FILE IS USED TO GENERATE @prefix@-asm.c.
+THIS FILE IS MACHINE GENERATED WITH CGEN.
+- the resultant file is machine generated, cgen-asm.in isn't
-Copyright (C) 1996, 1997, 1998 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.
along with this program; if not, write to the Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+/* ??? Eventually more and more of this stuff can go to cpu-independent files.
+ Keep that in mind. */
+
#include "sysdep.h"
#include <ctype.h>
#include <stdio.h>
#include "ansidecl.h"
#include "bfd.h"
#include "symcat.h"
+#include "@prefix@-desc.h"
#include "@prefix@-opc.h"
#include "opintl.h"
+#include "xregex.h"
#undef min
#define min(a,b) ((a) < (b) ? (a) : (b))
#undef max
#define max(a,b) ((a) > (b) ? (a) : (b))
-#undef INLINE
-#ifdef __GNUC__
-#define INLINE __inline__
-#else
-#define INLINE
-#endif
-
-/* Used by the ifield rtx function. */
-#define FLD(f) (fields->f)
-
-static const char * insert_normal
- PARAMS ((CGEN_OPCODE_DESC, long, unsigned int, unsigned int, unsigned int,
- unsigned int, unsigned int, unsigned int, CGEN_INSN_BYTES_PTR));
static const char * parse_insn_normal
- PARAMS ((CGEN_OPCODE_DESC, const CGEN_INSN *,
- const char **, CGEN_FIELDS *));
-static const char * insert_insn_normal
- PARAMS ((CGEN_OPCODE_DESC, const CGEN_INSN *,
- CGEN_FIELDS *, CGEN_INSN_BYTES_PTR, bfd_vma));
+ PARAMS ((CGEN_CPU_DESC, const CGEN_INSN *, const char **, CGEN_FIELDS *));
\f
/* -- assembler routines inserted here */
\f
-#if ! CGEN_INT_INSN_P
-/* Subroutine of insert_normal. */
+/*
+ Regex construction routine.
-static INLINE void
-insert_1 (od, value, start, length, word_length, bufp)
- CGEN_OPCODE_DESC od;
- unsigned long value;
- int start,length,word_length;
- unsigned char *bufp;
-{
- unsigned long x,mask;
- int shift;
- int big_p = CGEN_OPCODE_INSN_ENDIAN (od) == CGEN_ENDIAN_BIG;
+ This translates an opcode syntax string into a regex string,
+ by replacing any non-character syntax element (such as an
+ opcode) with the pattern '.*'
- switch (word_length)
- {
- case 8:
- x = *bufp;
- break;
- case 16:
- if (big_p)
- x = bfd_getb16 (bufp);
- else
- x = bfd_getl16 (bufp);
- break;
- case 24:
- /* ??? This may need reworking as these cases don't necessarily
- want the first byte and the last two bytes handled like this. */
- if (big_p)
- x = (bufp[0] << 16) | bfd_getb16 (bufp + 1);
- else
- x = bfd_getl16 (bufp) | (bufp[2] << 16);
- break;
- case 32:
- if (big_p)
- x = bfd_getb32 (bufp);
- else
- x = bfd_getl32 (bufp);
- break;
- default :
- abort ();
- }
+ It then compiles the regex and stores it in the opcode, for
+ later use by @arch@_cgen_assemble_insn
- /* Written this way to avoid undefined behaviour. */
- mask = (((1L << (length - 1)) - 1) << 1) | 1;
- if (CGEN_INSN_LSB0_P)
- shift = (start + 1) - length;
- else
- shift = (word_length - (start + length));
- x = (x & ~(mask << shift)) | ((value & mask) << shift);
+ returns NULL for success, an error message for failure
+*/
- switch (word_length)
+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:
- *bufp = x;
- break;
- case 16:
- if (big_p)
- bfd_putb16 (x, bufp);
- else
- bfd_putl16 (x, bufp);
- break;
- case 24:
- /* ??? This may need reworking as these cases don't necessarily
- want the first byte and the last two bytes handled like this. */
- if (big_p)
+ if (CGEN_SYNTAX_CHAR_P (* syn))
{
- bufp[0] = x >> 16;
- bfd_putb16 (x, bufp + 1);
+ char tmp = CGEN_SYNTAX_CHAR (* syn);
+ switch (tmp)
+ {
+ /* escape any regex metacharacters in the syntax */
+ case '.': case '[': case '\\':
+ case '*': case '^': case '$':
+
+#ifdef CGEN_ESCAPE_EXTENDED_REGEX
+ case '?': case '{': case '}':
+ case '(': case ')': case '*':
+ case '|': case '+': case ']':
+#endif
+
+ * rx++ = '\\';
+ break;
+ }
+ /* insert syntax char into rx */
+ * rx = tmp;
}
else
{
- bfd_putl16 (x, bufp);
- bufp[2] = x >> 16;
+ /* replace non-syntax fields with globs */
+ * rx = '.';
+ * ++rx = '*';
}
- break;
- case 32:
- if (big_p)
- bfd_putb32 (x, bufp);
- else
- bfd_putl32 (x, bufp);
- break;
- default :
- abort ();
}
-}
-
-#endif /* ! CGEN_INT_INSN_P */
-/* Default insertion routine.
+ /* trailing whitespace ok */
+ * rx++ = '[';
+ * rx++ = ' ';
+ * rx++ = '\t';
+ * rx++ = ']';
+ * rx++ = '*';
- ATTRS is a mask of the boolean attributes.
- WORD_OFFSET is the offset in bits from the start of the insn of the value.
- WORD_LENGTH is the length of the word in bits in which the value resides.
- START is the starting bit number in the word, architecture origin.
- LENGTH is the length of VALUE in bits.
- TOTAL_LENGTH is the total length of the insn in bits.
+ /* but anchor it after that */
+ * rx++ = '$';
+ * rx = '\0';
- The result is an error message or NULL if success. */
-
-/* ??? This duplicates functionality with bfd's howto table and
- bfd_install_relocation. */
-/* ??? This doesn't handle bfd_vma's. Create another function when
- necessary. */
-
-static const char *
-insert_normal (od, value, attrs, word_offset, start, length, word_length,
- total_length, buffer)
- CGEN_OPCODE_DESC od;
- long value;
- unsigned int attrs;
- unsigned int word_offset, start, length, word_length, total_length;
- CGEN_INSN_BYTES_PTR buffer;
-{
- static char errbuf[100];
- /* Written this way to avoid undefined behaviour. */
- unsigned long mask = (((1L << (length - 1)) - 1) << 1) | 1;
+ CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t));
+ reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB|REG_ICASE);
- /* If LENGTH is zero, this operand doesn't contribute to the value. */
- if (length == 0)
+ if (reg_err == 0)
return NULL;
-
- if (CGEN_INT_INSN_P
- && word_offset != 0)
- abort ();
-
- if (word_length > 32)
- abort ();
-
- /* For architectures with insns smaller than the insn-base-bitsize,
- word_length may be too big. */
-#if CGEN_MIN_INSN_BITSIZE < CGEN_BASE_INSN_BITSIZE
- if (word_offset == 0
- && word_length > total_length)
- word_length = total_length;
-#endif
-
- /* Ensure VALUE will fit. */
- if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_UNSIGNED))
- {
- unsigned long maxval = mask;
- if ((unsigned long) value > maxval)
- {
- /* xgettext:c-format */
- sprintf (errbuf,
- _("operand out of range (%lu not between 0 and %lu)"),
- value, maxval);
- return errbuf;
- }
- }
else
{
- long minval = - (1L << (length - 1));
- long maxval = (1L << (length - 1)) - 1;
- if (value < minval || value > maxval)
- {
- sprintf
- /* xgettext:c-format */
- (errbuf, _("operand out of range (%ld not between %ld and %ld)"),
- value, minval, maxval);
- return errbuf;
- }
+ 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;
}
-
-#if CGEN_INT_INSN_P
-
- {
- int shift;
-
- if (CGEN_INSN_LSB0_P)
- shift = (start + 1) - length;
- else
- shift = word_length - (start + length);
- *buffer = (*buffer & ~(mask << shift)) | ((value & mask) << shift);
- }
-
-#else /* ! CGEN_INT_INSN_P */
-
- {
- unsigned char *bufp = (unsigned char *) buffer + word_offset / 8;
-
- insert_1 (od, value, start, length, word_length, bufp);
- }
-
-#endif /* ! CGEN_INT_INSN_P */
-
- return NULL;
}
+
\f
/* Default insn parser.
*/
static const char *
-parse_insn_normal (od, insn, strp, fields)
- CGEN_OPCODE_DESC od;
- const CGEN_INSN * insn;
- const char ** strp;
- CGEN_FIELDS * fields;
+parse_insn_normal (cd, insn, strp, fields)
+ CGEN_CPU_DESC cd;
+ const CGEN_INSN *insn;
+ const char **strp;
+ CGEN_FIELDS *fields;
{
- const CGEN_SYNTAX * syntax = CGEN_INSN_SYNTAX (insn);
- const char * str = *strp;
- const char * errmsg;
- const char * p;
- const unsigned char * syn;
+ /* ??? 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;
p = CGEN_INSN_MNEMONIC (insn);
while (*p && tolower (*p) == tolower (*str))
++p, ++str;
-
- if (* p || (* str && !isspace (* str)))
+
+ if (* p)
return _("unrecognized instruction");
- CGEN_INIT_PARSE (od);
- cgen_init_parse_operand (od);
+#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
/* Non operand chars must match exactly. */
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;
}
- else
+ else if (*str)
{
/* Syntax char didn't match. Can't be this insn. */
- /* FIXME: would like to return something like
- "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 (od, CGEN_SYNTAX_FIELD (*syn),
+ errmsg = @arch@_cgen_parse_operand (cd, CGEN_SYNTAX_FIELD (*syn),
&str, fields);
if (errmsg)
return errmsg;
}
/* 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
/* We couldn't parse it. */
return _("unrecognized instruction");
}
-
-/* Default insn builder (insert handler).
- The instruction is recorded in CGEN_INT_INSN_P byte order
- (meaning that if CGEN_INT_INSN_P BUFFER is an int * and thus the value is
- recorded in host byte order, otherwise BUFFER is an array of bytes and the
- value is recorded in target byte order).
- The result is an error message or NULL if success. */
-
-static const char *
-insert_insn_normal (od, insn, fields, buffer, pc)
- CGEN_OPCODE_DESC od;
- const CGEN_INSN * insn;
- CGEN_FIELDS * fields;
- CGEN_INSN_BYTES_PTR buffer;
- bfd_vma pc;
-{
- const CGEN_SYNTAX * syntax = CGEN_INSN_SYNTAX (insn);
- unsigned long value;
- const unsigned char * syn;
-
- CGEN_INIT_INSERT (od);
- value = CGEN_INSN_BASE_VALUE (insn);
-
- /* If we're recording insns as numbers (rather than a string of bytes),
- target byte order handling is deferred until later. */
-
-#if CGEN_INT_INSN_P
-
- *buffer = value;
-
-#else
-
- cgen_put_insn_value (od, buffer, min (CGEN_BASE_INSN_BITSIZE,
- CGEN_FIELDS_BITSIZE (fields)),
- value);
-
-#endif /* ! CGEN_INT_INSN_P */
-
- /* ??? It would be better to scan the format's fields.
- Still need to be able to insert a value based on the operand though;
- e.g. storing a branch displacement that got resolved later.
- Needs more thought first. */
-
- for (syn = CGEN_SYNTAX_STRING (syntax); * syn != '\0'; ++ syn)
- {
- const char *errmsg;
-
- if (CGEN_SYNTAX_CHAR_P (* syn))
- continue;
-
- errmsg = @arch@_cgen_insert_operand (od, CGEN_SYNTAX_FIELD (*syn),
- fields, buffer, pc);
- if (errmsg)
- return errmsg;
- }
-
- return NULL;
-}
\f
/* Main entry point.
This routine is called for each instruction to be assembled.
printed).
Note that when processing (non-alias) macro-insns,
- this function recurses. */
+ 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 (od, str, fields, buf, errmsg)
- CGEN_OPCODE_DESC od;
- const char * str;
- CGEN_FIELDS * fields;
+@arch@_cgen_assemble_insn (cd, str, fields, buf, errmsg)
+ CGEN_CPU_DESC cd;
+ const char *str;
+ CGEN_FIELDS *fields;
CGEN_INSN_BYTES_PTR buf;
- char ** errmsg;
+ char **errmsg;
{
- const char * start;
- CGEN_INSN_LIST * ilist;
+ 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))
/* The instructions are stored in hashed lists.
Get the first in the list. */
- ilist = CGEN_ASM_LOOKUP_INSN (od, 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 (od, insn))
+ if (! @arch@_cgen_insn_supported (cd, insn))
continue;
#endif
/* If the RELAX attribute is set, this is an insn that shouldn't be
chosen immediately. Instead, it is used during assembler/linker
relaxation if possible. */
- if (CGEN_INSN_ATTR (insn, CGEN_INSN_RELAX) != 0)
+ if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAX) != 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);
- if (! CGEN_PARSE_FN (insn) (od, insn, & str, fields))
- {
- /* ??? 0 is passed for `pc' */
- if (CGEN_INSERT_FN (insn) (od, insn, fields, buf, (bfd_vma) 0) != NULL)
- continue;
- /* It is up to the caller to actually output the insn and any
- queued relocs. */
- return insn;
- }
+ parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields);
+ if (parse_errmsg != NULL)
+ continue;
- /* Try the next entry. */
+ /* ??? 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;
}
- /* 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];
+ 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 (od, opvals)
- CGEN_OPCODE_DESC od;
- CGEN_KEYWORD * 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;
if (! @arch@_cgen_opval_supported (ke))
continue;
#endif
- cgen_asm_record_register (od, ke->name, ke->value);
+ cgen_asm_record_register (cd, ke->name, ke->value);
}
}
projects / deliverable / binutils-gdb.git / blobdiff