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authorNick Clifton <nickc@redhat.com>2002-07-19 07:52:40 +0000
committerNick Clifton <nickc@redhat.com>2002-07-19 07:52:40 +0000
commita40cbfa3c951ac0fcbdf8f98ab668beacca2b872 (patch)
tree97d5c0f90e243e154e4c450123cff2f9d53355e7 /opcodes/ip2k-asm.c
parentccaf4e0741c1b4420a489e24cac518168106c146 (diff)
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Add IP2k GAS and OPCODES support.
Diffstat (limited to 'opcodes/ip2k-asm.c')
-rw-r--r--opcodes/ip2k-asm.c977
1 files changed, 977 insertions, 0 deletions
diff --git a/opcodes/ip2k-asm.c b/opcodes/ip2k-asm.c
new file mode 100644
index 0000000..c2163b0
--- /dev/null
+++ b/opcodes/ip2k-asm.c
@@ -0,0 +1,977 @@
+/* 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 Free Software Foundation, Inc.
+
+This file is part of the GNU Binutils and GDB, the GNU debugger.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software Foundation, Inc.,
+59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+/* ??? Eventually more and more of this stuff can go to cpu-independent files.
+ Keep that in mind. */
+
+#include "sysdep.h"
+#include <stdio.h>
+#include "ansidecl.h"
+#include "bfd.h"
+#include "symcat.h"
+#include "ip2k-desc.h"
+#include "ip2k-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
+ PARAMS ((CGEN_CPU_DESC, const CGEN_INSN *, const char **, CGEN_FIELDS *));
+
+/* -- assembler routines inserted here. */
+
+/* -- asm.c */
+
+static const char *
+parse_fr (cd, strp, opindex, valuep)
+ CGEN_CPU_DESC cd;
+ const char **strp;
+ int opindex;
+ long *valuep;
+{
+ const char *errmsg;
+ char *old_strp;
+ char *afteroffset;
+ enum cgen_parse_operand_result result_type;
+ bfd_vma value;
+ extern CGEN_KEYWORD ip2k_cgen_opval_register_names;
+ long tempvalue;
+
+ old_strp = *strp;
+ afteroffset = NULL;
+
+
+ /* Check here to see if you're about to try parsing a w as the first arg */
+ /* and return an error if you are. */
+ if ( (strncmp(*strp,"w",1)==0) || (strncmp(*strp,"W",1)==0) )
+ {
+ (*strp)++;
+
+ if ( (strncmp(*strp,",",1)==0) || isspace(**strp) )
+ {
+ /* We've been passed a w. Return with an error message so that */
+ /* cgen will try the next parsing option. */
+ errmsg = _("W keyword invalid in FR operand slot.");
+ return errmsg;
+ }
+ *strp = old_strp;
+ }
+
+
+ /* Attempt parse as register keyword. */
+ /* old_strp = *strp; */
+
+ errmsg = cgen_parse_keyword (cd, strp, & ip2k_cgen_opval_register_names, valuep);
+ if ( *strp != NULL )
+ if (errmsg == NULL)
+ return errmsg;
+
+ /* Attempt to parse for "(IP)" */
+ afteroffset = strstr(*strp,"(IP)");
+
+ if ( afteroffset == NULL)
+ {
+ /* Make sure it's not in lower case */
+ afteroffset = strstr(*strp,"(ip)");
+ }
+
+ if ( afteroffset != NULL )
+ {
+ if ( afteroffset != *strp )
+ {
+ /* Invalid offset present.*/
+ errmsg = _("offset(IP) is not a valid form");
+ return errmsg;
+ }
+ else
+ {
+ *strp += 4;
+ *valuep = 0;
+ errmsg = NULL;
+ return errmsg;
+ }
+ }
+
+ /* Attempt to parse for DP. ex: mov w, offset(DP) */
+ /* mov offset(DP),w */
+
+ /* Try parsing it as an address and see what comes back */
+
+ afteroffset = strstr(*strp,"(DP)");
+
+ if ( afteroffset == NULL)
+ {
+ /* Maybe it's in lower case */
+ afteroffset = strstr(*strp,"(dp)");
+ }
+
+ if ( afteroffset != NULL )
+ {
+ if ( afteroffset == *strp )
+ {
+ /* No offset present. Use 0 by default. */
+ tempvalue = 0;
+ errmsg = NULL;
+ }
+ else
+ {
+ errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_IP2K_FR_OFFSET,
+ & result_type, & tempvalue);
+ }
+
+ if (errmsg == NULL)
+ {
+ if ( (tempvalue >= 0) && (tempvalue <= 127) )
+ {
+ /* Value is ok. Fix up the first 2 bits and return */
+ *valuep = 0x0100 | tempvalue;
+ *strp += 4; /* skip over the (DP) in *strp */
+ return errmsg;
+ } else
+ {
+ /* Found something there in front of (DP) but it's out of range. */
+ errmsg = _("(DP) offset out of range.");
+ return errmsg;
+ }
+
+ }
+ }
+
+
+ /* Attempt to parse for SP. ex: mov w, offset(SP) */
+ /* mov offset(SP), w */
+
+
+ afteroffset = strstr(*strp,"(SP)");
+
+ if (afteroffset == NULL)
+ {
+ /* Maybe it's in lower case. */
+ afteroffset = strstr(*strp, "(sp)");
+ }
+
+ if ( afteroffset != NULL )
+ {
+ if ( afteroffset == *strp )
+ {
+ /* No offset present. Use 0 by default. */
+ tempvalue = 0;
+ errmsg = NULL;
+ }
+ else
+ {
+ errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_IP2K_FR_OFFSET,
+ & result_type, & tempvalue);
+ }
+ if (errmsg == NULL)
+ {
+ if ( (tempvalue >= 0) && (tempvalue <= 127) )
+ {
+ /* Value is ok. Fix up the first 2 bits and return */
+ *valuep = 0x0180 | tempvalue;
+ *strp += 4; /* skip over the (SP) in *strp */
+ return errmsg;
+ } else
+ {
+ /* Found something there in front of (SP) but it's out of range. */
+ errmsg = _("(SP) offset out of range.");
+ return errmsg;
+ }
+
+ }
+ }
+
+
+ /* Attempt to parse as an address. */
+ *strp = old_strp;
+ errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_IP2K_FR9,
+ & result_type, & value);
+ if (errmsg == NULL)
+ {
+ *valuep = value;
+
+ /* if a parenthesis is found, warn about invalid form */
+
+ if (**strp == '(')
+ {
+ errmsg = _("illegal use of parentheses");
+ }
+ /* if a numeric value is specified, ensure that it is between 1 and 255 */
+ else if (result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
+ {
+ if (value < 0x1 || value > 0xff)
+ errmsg = _("operand out of range (not between 1 and 255)");
+ }
+ }
+ return errmsg;
+}
+
+static const char *
+parse_addr16 (cd, strp, opindex, valuep)
+ CGEN_CPU_DESC cd;
+ const char **strp;
+ int opindex;
+ long *valuep;
+{
+ const char *errmsg;
+ enum cgen_parse_operand_result result_type;
+ bfd_reloc_code_real_type code = BFD_RELOC_NONE;
+ long value;
+
+ if ( opindex == (CGEN_OPERAND_TYPE)IP2K_OPERAND_ADDR16H )
+ code = BFD_RELOC_IP2K_HI8DATA;
+ else if ( opindex == (CGEN_OPERAND_TYPE)IP2K_OPERAND_ADDR16L )
+ code = BFD_RELOC_IP2K_LO8DATA;
+ else
+ {
+ /* Something is very wrong. opindex has to be one of the above. */
+ errmsg = _("parse_addr16: invalid opindex.");
+ return errmsg;
+ }
+
+ errmsg = cgen_parse_address (cd, strp, opindex, code,
+ & result_type, & value);
+ if (errmsg == NULL)
+ {
+ /* We either have a relocation or a number now. */
+ if ( result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER )
+ {
+ /* We got a number back. */
+ if ( code == BFD_RELOC_IP2K_HI8DATA )
+ value >>= 8;
+ else /* code = BFD_RELOC_IP2K_LOW8DATA */
+ value &= 0x00FF;
+ }
+ *valuep = value;
+ }
+
+ return errmsg;
+}
+
+
+ static const char *
+ parse_addr16_p (cd, strp, opindex, valuep)
+ CGEN_CPU_DESC cd;
+ const char **strp;
+ int opindex;
+ long *valuep;
+ {
+ const char *errmsg;
+ enum cgen_parse_operand_result result_type;
+ bfd_reloc_code_real_type code = BFD_RELOC_IP2K_PAGE3;
+ long value;
+
+ errmsg = cgen_parse_address (cd, strp, opindex, code,
+ & result_type, & value);
+ if (errmsg == NULL)
+ {
+ if ( result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER )
+ *valuep = (value >> 13) & 0x7;
+ else if ( result_type == CGEN_PARSE_OPERAND_RESULT_QUEUED )
+ *valuep = value;
+ }
+ return errmsg;
+ }
+
+
+ static const char *
+ parse_addr16_cjp (cd, strp, opindex, valuep)
+ CGEN_CPU_DESC cd;
+ const char **strp;
+ int opindex;
+ long *valuep;
+ {
+ const char *errmsg;
+ enum cgen_parse_operand_result result_type;
+ bfd_reloc_code_real_type code = BFD_RELOC_NONE;
+ long value;
+
+ if ( opindex == (CGEN_OPERAND_TYPE)IP2K_OPERAND_ADDR16CJP )
+ code = BFD_RELOC_IP2K_ADDR16CJP;
+ else if ( opindex == (CGEN_OPERAND_TYPE)IP2K_OPERAND_ADDR16P )
+ code = BFD_RELOC_IP2K_PAGE3;
+
+ errmsg = cgen_parse_address (cd, strp, opindex, code,
+ & result_type, & value);
+ if (errmsg == NULL)
+ {
+ if ( result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER )
+ {
+ if ( (value & 0x1) == 0) /* If the address is even .... */
+ {
+ if ( opindex == (CGEN_OPERAND_TYPE)IP2K_OPERAND_ADDR16CJP )
+ *valuep = (value >> 1) & 0x1FFF; /* Should mask be 1FFF? */
+ else if ( opindex == (CGEN_OPERAND_TYPE)IP2K_OPERAND_ADDR16P )
+ *valuep = (value >> 14) & 0x7;
+ }
+ else
+ errmsg = _("Byte address required. - must be even.");
+ }else if ( result_type == CGEN_PARSE_OPERAND_RESULT_QUEUED )
+ {
+ /* This will happen for things like (s2-s1) where s2 and s1 */
+ /* are labels. */
+ *valuep = value;
+ }
+ else
+ errmsg = _("cgen_parse_address returned a symbol. Literal required.");
+ }
+ return errmsg;
+ }
+
+
+static const char *
+parse_lit8 (cd, strp, opindex, valuep)
+ CGEN_CPU_DESC cd;
+ const char **strp;
+ int opindex;
+ long *valuep;
+{
+ const char *errmsg;
+ enum cgen_parse_operand_result result_type;
+ bfd_reloc_code_real_type code = BFD_RELOC_NONE;
+ long value;
+
+ /* Parse %OP relocating operators. */
+ if (strncmp (*strp, "%bank", 5) == 0)
+ {
+ *strp += 5;
+ code = BFD_RELOC_IP2K_BANK;
+ }
+ else if (strncmp (*strp, "%lo8data", 8) == 0)
+ {
+ *strp += 8;
+ code = BFD_RELOC_IP2K_LO8DATA;
+ }
+ else if (strncmp (*strp, "%hi8data", 8) == 0)
+ {
+ *strp += 8;
+ code = BFD_RELOC_IP2K_HI8DATA;
+ }
+ else if (strncmp (*strp, "%ex8data", 8) == 0)
+ {
+ *strp += 8;
+ code = BFD_RELOC_IP2K_EX8DATA;
+ }
+ else if (strncmp (*strp, "%lo8insn", 8) == 0)
+ {
+ *strp += 8;
+ code = BFD_RELOC_IP2K_LO8INSN;
+ }
+ else if (strncmp (*strp, "%hi8insn", 8) == 0)
+ {
+ *strp += 8;
+ code = BFD_RELOC_IP2K_HI8INSN;
+ }
+
+
+ /* Parse %op operand. */
+ if (code != BFD_RELOC_NONE)
+ {
+ errmsg = cgen_parse_address (cd, strp, opindex, code,
+ & result_type, & value);
+ if ((errmsg == NULL) &&
+ (result_type != CGEN_PARSE_OPERAND_RESULT_QUEUED))
+ errmsg = _("%operator operand is not a symbol");
+
+ *valuep = value;
+ }
+ /* Parse as a number. */
+ else
+ {
+ errmsg = cgen_parse_signed_integer (cd, strp, opindex, valuep);
+
+ /* Truncate to eight bits to accept both signed and unsigned input. */
+ if (errmsg == NULL)
+ *valuep &= 0xFF;
+ }
+
+ return errmsg;
+}
+
+static const char *
+parse_bit3 (cd, strp, opindex, valuep)
+ CGEN_CPU_DESC cd;
+ const char **strp;
+ int opindex;
+ long *valuep;
+{
+ const char *errmsg;
+ char mode = 0;
+ long count = 0;
+ unsigned long value;
+
+ if (strncmp (*strp, "%bit", 4) == 0)
+ {
+ *strp += 4;
+ mode = 1;
+ }
+ else if (strncmp (*strp, "%msbbit", 7) == 0)
+ {
+ *strp += 7;
+ mode = 1;
+ }
+ else if (strncmp (*strp, "%lsbbit", 7) == 0)
+ {
+ *strp += 7;
+ mode = 2;
+ }
+
+ errmsg = cgen_parse_signed_integer (cd, strp, opindex, valuep);
+ if (errmsg) {
+ return errmsg;
+ }
+
+ if (mode) {
+ value = (unsigned long) *valuep;
+ if (value == 0) {
+ errmsg = _("Attempt to find bit index of 0");
+ return errmsg;
+ }
+
+ if (mode == 1) {
+ count = 31;
+ while ((value & 0x80000000) == 0) {
+ count--;
+ value <<= 1;
+ }
+ } else if (mode == 2) {
+ count = 0;
+ while ((value & 0x00000001) == 0) {
+ count++;
+ value >>= 1;
+ }
+ }
+
+ *valuep = count;
+ }
+
+ return errmsg;
+}
+
+
+/* -- dis.c */
+
+const char * ip2k_cgen_parse_operand
+ PARAMS ((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 *
+ip2k_cgen_parse_operand (cd, opindex, strp, fields)
+ 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 IP2K_OPERAND_ADDR16CJP :
+ errmsg = parse_addr16_cjp (cd, strp, IP2K_OPERAND_ADDR16CJP, &fields->f_addr16cjp);
+ break;
+ case IP2K_OPERAND_ADDR16H :
+ errmsg = parse_addr16 (cd, strp, IP2K_OPERAND_ADDR16H, &fields->f_imm8);
+ break;
+ case IP2K_OPERAND_ADDR16L :
+ errmsg = parse_addr16 (cd, strp, IP2K_OPERAND_ADDR16L, &fields->f_imm8);
+ break;
+ case IP2K_OPERAND_ADDR16P :
+ errmsg = parse_addr16_cjp (cd, strp, IP2K_OPERAND_ADDR16P, &fields->f_page3);
+ break;
+ case IP2K_OPERAND_BITNO :
+ errmsg = parse_bit3 (cd, strp, IP2K_OPERAND_BITNO, &fields->f_bitno);
+ break;
+ case IP2K_OPERAND_CBIT :
+ errmsg = cgen_parse_unsigned_integer (cd, strp, IP2K_OPERAND_CBIT, &junk);
+ break;
+ case IP2K_OPERAND_DCBIT :
+ errmsg = cgen_parse_unsigned_integer (cd, strp, IP2K_OPERAND_DCBIT, &junk);
+ break;
+ case IP2K_OPERAND_FR :
+ errmsg = parse_fr (cd, strp, IP2K_OPERAND_FR, &fields->f_reg);
+ break;
+ case IP2K_OPERAND_LIT8 :
+ errmsg = parse_lit8 (cd, strp, IP2K_OPERAND_LIT8, &fields->f_imm8);
+ break;
+ case IP2K_OPERAND_PABITS :
+ errmsg = cgen_parse_unsigned_integer (cd, strp, IP2K_OPERAND_PABITS, &junk);
+ break;
+ case IP2K_OPERAND_RETI3 :
+ errmsg = cgen_parse_unsigned_integer (cd, strp, IP2K_OPERAND_RETI3, &fields->f_reti3);
+ break;
+ case IP2K_OPERAND_ZBIT :
+ errmsg = cgen_parse_unsigned_integer (cd, strp, IP2K_OPERAND_ZBIT, &junk);
+ break;
+
+ default :
+ /* xgettext:c-format */
+ fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex);
+ abort ();
+ }
+
+ return errmsg;
+}
+
+cgen_parse_fn * const ip2k_cgen_parse_handlers[] =
+{
+ parse_insn_normal,
+};
+
+void
+ip2k_cgen_init_asm (cd)
+ CGEN_CPU_DESC cd;
+{
+ ip2k_cgen_init_opcode_table (cd);
+ ip2k_cgen_init_ibld_table (cd);
+ cd->parse_handlers = & ip2k_cgen_parse_handlers[0];
+ cd->parse_operand = ip2k_cgen_parse_operand;
+}
+
+
+
+/* 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 ip2k_cgen_assemble_insn
+
+ Returns NULL for success, an error message for failure. */
+
+char *
+ip2k_cgen_build_insn_regex (insn)
+ 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 (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 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 *
+ip2k_cgen_assemble_insn (cd, str, fields, buf, errmsg)
+ CGEN_CPU_DESC cd;
+ const char *str;
+ CGEN_FIELDS *fields;
+ CGEN_INSN_BYTES_PTR buf;
+ char **errmsg;
+{
+ const char *start;
+ CGEN_INSN_LIST *ilist;
+ 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 (! ip2k_cgen_insn_supported (cd, insn))
+ continue;
+#endif
+ /* If the RELAX attribute is set, this is an insn that shouldn't be
+ chosen immediately. Instead, it is used during assembler/linker
+ relaxation if possible. */
+ if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAX) != 0)
+ continue;
+
+ str = start;
+
+ /* 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;
+ }
+}
+
+#if 0 /* This calls back to GAS which we can't do without care. */
+
+/* Record each member of OPVALS in the assembler's symbol table.
+ This lets GAS parse registers for us.
+ ??? Interesting idea but not currently used. */
+
+/* Record each member of OPVALS in the assembler's symbol table.
+ FIXME: Not currently used. */
+
+void
+ip2k_cgen_asm_hash_keywords (cd, opvals)
+ CGEN_CPU_DESC cd;
+ CGEN_KEYWORD *opvals;
+{
+ CGEN_KEYWORD_SEARCH search = cgen_keyword_search_init (opvals, NULL);
+ const CGEN_KEYWORD_ENTRY * ke;
+
+ while ((ke = cgen_keyword_search_next (& search)) != NULL)
+ {
+#if 0 /* Unnecessary, should be done in the search routine. */
+ if (! ip2k_cgen_opval_supported (ke))
+ continue;
+#endif
+ cgen_asm_record_register (cd, ke->name, ke->value);
+ }
+}
+
+#endif /* 0 */