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cell-binutils  2.17cvs20070401
Defines | Functions | Variables
iq2000-asm.c File Reference
#include "sysdep.h"
#include <stdio.h>
#include "ansidecl.h"
#include "bfd.h"
#include "symcat.h"
#include "iq2000-desc.h"
#include "iq2000-opc.h"
#include "opintl.h"
#include "xregex.h"
#include "libiberty.h"
#include "safe-ctype.h"

Go to the source code of this file.

Defines

#define min(a, b)   ((a) < (b) ? (a) : (b))
#define max(a, b)   ((a) > (b) ? (a) : (b))

Functions

static const char * parse_insn_normal (CGEN_CPU_DESC, const CGEN_INSN *, const char **, CGEN_FIELDS *)
int iq2000_cgen_insn_supported (CGEN_CPU_DESC cd, const CGEN_INSN *insn)
static int iq2000_cgen_isa_register (const char **strp)
static const char * parse_mimm (CGEN_CPU_DESC cd, const char **strp, int opindex, unsigned long *valuep)
static const char * parse_imm (CGEN_CPU_DESC cd, const char **strp, int opindex, unsigned long *valuep)
static const char * parse_jtargq10 (CGEN_CPU_DESC cd, const char **strp, int opindex, int reloc ATTRIBUTE_UNUSED, enum cgen_parse_operand_result *type_addr ATTRIBUTE_UNUSED, bfd_vma *valuep)
static const char * parse_hi16 (CGEN_CPU_DESC cd, const char **strp, int opindex, unsigned long *valuep)
static const char * parse_lo16 (CGEN_CPU_DESC cd, const char **strp, int opindex, unsigned long *valuep)
static const char * parse_mlo16 (CGEN_CPU_DESC cd, const char **strp, int opindex, unsigned long *valuep)
const char * iq2000_cgen_parse_operand (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *)
void iq2000_cgen_init_asm (CGEN_CPU_DESC cd)
char * iq2000_cgen_build_insn_regex (CGEN_INSN *insn)
const CGEN_INSN * iq2000_cgen_assemble_insn (CGEN_CPU_DESC cd, const char *str, CGEN_FIELDS *fields, CGEN_INSN_BYTES_PTR buf, char **errmsg)

Variables

static const char * MISSING_CLOSING_PARENTHESIS = N_("missing `)'")
cgen_parse_fn *const iq2000_cgen_parse_handlers []

Define Documentation

#define max (   a,
  b 
)    ((a) > (b) ? (a) : (b))

Definition at line 44 of file iq2000-asm.c.

#define min (   a,
  b 
)    ((a) < (b) ? (a) : (b))

Definition at line 42 of file iq2000-asm.c.


Function Documentation

const CGEN_INSN* iq2000_cgen_assemble_insn ( CGEN_CPU_DESC  cd,
const char *  str,
CGEN_FIELDS *  fields,
CGEN_INSN_BYTES_PTR  buf,
char **  errmsg 
)

Definition at line 760 of file iq2000-asm.c.

{
  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 (! iq2000_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;
  }
}

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char* iq2000_cgen_build_insn_regex ( CGEN_INSN *  insn)

Definition at line 496 of file iq2000-asm.c.

{  
  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;
    }
}

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Definition at line 471 of file iq2000-asm.c.

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int iq2000_cgen_insn_supported ( CGEN_CPU_DESC  cd,
const CGEN_INSN *  insn 
)

Definition at line 60 of file iq2000-asm.c.

{
  int machs = cd->machs;

  return (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_MACH) & machs) != 0;
}

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static int iq2000_cgen_isa_register ( const char **  strp) [static]

Definition at line 68 of file iq2000-asm.c.

{
  int len;
  int ch1, ch2;

  if (**strp == 'r' || **strp == 'R') 
    {
      len = strlen (*strp);
      if (len == 2) 
        {
          ch1 = (*strp)[1];
          if ('0' <= ch1 && ch1 <= '9')
            return 1;
        } 
      else if (len == 3) 
        {
         ch1 = (*strp)[1];
          ch2 = (*strp)[2];
          if (('1' <= ch1 && ch1 <= '2') && ('0' <= ch2 && ch2 <= '9'))
            return 1;
          if ('3' == ch1 && (ch2 == '0' || ch2 == '1'))
            return 1;
        }
    }
  if (**strp == '%'
      && TOLOWER ((*strp)[1]) != 'l'
      && TOLOWER ((*strp)[1]) != 'h')
    return 1;
  return 0;
}

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const char * iq2000_cgen_parse_operand ( CGEN_CPU_DESC  cd,
int  opindex,
const char **  strp,
CGEN_FIELDS *  fields 
)

Definition at line 335 of file iq2000-asm.c.

{
  const char * errmsg = NULL;
  /* Used by scalar operands that still need to be parsed.  */
  long junk ATTRIBUTE_UNUSED;

  switch (opindex)
    {
    case IQ2000_OPERAND__INDEX :
      errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND__INDEX, (unsigned long *) (& fields->f_index));
      break;
    case IQ2000_OPERAND_BASE :
      errmsg = cgen_parse_keyword (cd, strp, & iq2000_cgen_opval_gr_names, & fields->f_rs);
      break;
    case IQ2000_OPERAND_BASEOFF :
      {
        bfd_vma value = 0;
        errmsg = cgen_parse_address (cd, strp, IQ2000_OPERAND_BASEOFF, 0, NULL,  & value);
        fields->f_imm = value;
      }
      break;
    case IQ2000_OPERAND_BITNUM :
      errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_BITNUM, (unsigned long *) (& fields->f_rt));
      break;
    case IQ2000_OPERAND_BYTECOUNT :
      errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_BYTECOUNT, (unsigned long *) (& fields->f_bytecount));
      break;
    case IQ2000_OPERAND_CAM_Y :
      errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_CAM_Y, (unsigned long *) (& fields->f_cam_y));
      break;
    case IQ2000_OPERAND_CAM_Z :
      errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_CAM_Z, (unsigned long *) (& fields->f_cam_z));
      break;
    case IQ2000_OPERAND_CM_3FUNC :
      errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_CM_3FUNC, (unsigned long *) (& fields->f_cm_3func));
      break;
    case IQ2000_OPERAND_CM_3Z :
      errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_CM_3Z, (unsigned long *) (& fields->f_cm_3z));
      break;
    case IQ2000_OPERAND_CM_4FUNC :
      errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_CM_4FUNC, (unsigned long *) (& fields->f_cm_4func));
      break;
    case IQ2000_OPERAND_CM_4Z :
      errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_CM_4Z, (unsigned long *) (& fields->f_cm_4z));
      break;
    case IQ2000_OPERAND_COUNT :
      errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_COUNT, (unsigned long *) (& fields->f_count));
      break;
    case IQ2000_OPERAND_EXECODE :
      errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_EXECODE, (unsigned long *) (& fields->f_excode));
      break;
    case IQ2000_OPERAND_HI16 :
      errmsg = parse_hi16 (cd, strp, IQ2000_OPERAND_HI16, (unsigned long *) (& fields->f_imm));
      break;
    case IQ2000_OPERAND_IMM :
      errmsg = parse_imm (cd, strp, IQ2000_OPERAND_IMM, (unsigned long *) (& fields->f_imm));
      break;
    case IQ2000_OPERAND_JMPTARG :
      {
        bfd_vma value = 0;
        errmsg = cgen_parse_address (cd, strp, IQ2000_OPERAND_JMPTARG, 0, NULL,  & value);
        fields->f_jtarg = value;
      }
      break;
    case IQ2000_OPERAND_JMPTARGQ10 :
      {
        bfd_vma value = 0;
        errmsg = parse_jtargq10 (cd, strp, IQ2000_OPERAND_JMPTARGQ10, 0, NULL,  & value);
        fields->f_jtargq10 = value;
      }
      break;
    case IQ2000_OPERAND_LO16 :
      errmsg = parse_lo16 (cd, strp, IQ2000_OPERAND_LO16, (unsigned long *) (& fields->f_imm));
      break;
    case IQ2000_OPERAND_MASK :
      errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_MASK, (unsigned long *) (& fields->f_mask));
      break;
    case IQ2000_OPERAND_MASKL :
      errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_MASKL, (unsigned long *) (& fields->f_maskl));
      break;
    case IQ2000_OPERAND_MASKQ10 :
      errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_MASKQ10, (unsigned long *) (& fields->f_maskq10));
      break;
    case IQ2000_OPERAND_MASKR :
      errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_MASKR, (unsigned long *) (& fields->f_rs));
      break;
    case IQ2000_OPERAND_MLO16 :
      errmsg = parse_mlo16 (cd, strp, IQ2000_OPERAND_MLO16, (unsigned long *) (& fields->f_imm));
      break;
    case IQ2000_OPERAND_OFFSET :
      {
        bfd_vma value = 0;
        errmsg = cgen_parse_address (cd, strp, IQ2000_OPERAND_OFFSET, 0, NULL,  & value);
        fields->f_offset = value;
      }
      break;
    case IQ2000_OPERAND_RD :
      errmsg = cgen_parse_keyword (cd, strp, & iq2000_cgen_opval_gr_names, & fields->f_rd);
      break;
    case IQ2000_OPERAND_RD_RS :
      errmsg = cgen_parse_keyword (cd, strp, & iq2000_cgen_opval_gr_names, & fields->f_rd_rs);
      break;
    case IQ2000_OPERAND_RD_RT :
      errmsg = cgen_parse_keyword (cd, strp, & iq2000_cgen_opval_gr_names, & fields->f_rd_rt);
      break;
    case IQ2000_OPERAND_RS :
      errmsg = cgen_parse_keyword (cd, strp, & iq2000_cgen_opval_gr_names, & fields->f_rs);
      break;
    case IQ2000_OPERAND_RT :
      errmsg = cgen_parse_keyword (cd, strp, & iq2000_cgen_opval_gr_names, & fields->f_rt);
      break;
    case IQ2000_OPERAND_RT_RS :
      errmsg = cgen_parse_keyword (cd, strp, & iq2000_cgen_opval_gr_names, & fields->f_rt_rs);
      break;
    case IQ2000_OPERAND_SHAMT :
      errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_SHAMT, (unsigned long *) (& fields->f_shamt));
      break;

    default :
      /* xgettext:c-format */
      fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex);
      abort ();
  }

  return errmsg;
}

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static const char* parse_hi16 ( CGEN_CPU_DESC  cd,
const char **  strp,
int  opindex,
unsigned long valuep 
) [static]

Definition at line 190 of file iq2000-asm.c.

{
  if (strncasecmp (*strp, "%hi(", 4) == 0)
    {
      enum cgen_parse_operand_result result_type;
      bfd_vma value;
      const char *errmsg;

      *strp += 4;
      errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_HI16,
                               & result_type, & value);
      if (**strp != ')')
       return MISSING_CLOSING_PARENTHESIS;

      ++*strp;
      if (errmsg == NULL
         && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
       {
         /* If value has top-bit of %lo on, then it will
            sign-propagate and so we compensate by adding
            1 to the resultant %hi value.  */
         if (value & 0x8000)
           value += 0x10000;
         value >>= 16;
         value &= 0xffff;
       }
      *valuep = value;

      return errmsg;
    }

  /* We add %uhi in case a user just wants the high 16-bits or is using
     an insn like ori for %lo which does not sign-propagate.  */
  if (strncasecmp (*strp, "%uhi(", 5) == 0)
    {
      enum cgen_parse_operand_result result_type;
      bfd_vma value;
      const char *errmsg;

      *strp += 5;
      errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_IQ2000_UHI16,
                               & result_type, & value);
      if (**strp != ')')
       return MISSING_CLOSING_PARENTHESIS;

      ++*strp;
      if (errmsg == NULL
         && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
       value >>= 16;

      value &= 0xffff;
      *valuep = value;

      return errmsg;
    }

  return parse_imm (cd, strp, opindex, valuep);
}

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static const char* parse_imm ( CGEN_CPU_DESC  cd,
const char **  strp,
int  opindex,
unsigned long valuep 
) [static]

Definition at line 133 of file iq2000-asm.c.

{
  const char *errmsg;

  if (iq2000_cgen_isa_register (strp))
    errmsg = _("immediate value cannot be register");
  else
    {
      long value;

      errmsg = cgen_parse_signed_integer (cd, strp, opindex, & value);
      if (errmsg == NULL)
       {
         long x = value & 0xFFFF0000;

         if (x != 0 && x != (long) 0xFFFF0000)
           errmsg = _("immediate value out of range");
         else
           *valuep = (value & 0xFFFF);
       }
    }
  return errmsg;
}

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static const char * parse_insn_normal ( CGEN_CPU_DESC  cd,
const CGEN_INSN *  insn,
const char **  strp,
CGEN_FIELDS *  fields 
) [static]

Definition at line 619 of file iq2000-asm.c.

{
  /* ??? 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");
}

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static const char* parse_jtargq10 ( CGEN_CPU_DESC  cd,
const char **  strp,
int  opindex,
int reloc  ATTRIBUTE_UNUSED,
enum cgen_parse_operand_result *type_addr  ATTRIBUTE_UNUSED,
bfd_vma valuep 
) [static]

Definition at line 163 of file iq2000-asm.c.

{
  const char *errmsg;
  bfd_vma value;
  enum cgen_parse_operand_result result_type = CGEN_PARSE_OPERAND_RESULT_NUMBER;

  errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_IQ2000_OFFSET_21,
                            & result_type, & value);
  if (errmsg == NULL && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
    {
      /* Check value is within 23-bits
        (remembering that 2-bit shift right will occur).  */
      if (value > 0x7fffff)
        return _("21-bit offset out of range");
    }
  *valuep = (value & 0x7FFFFF);
  return errmsg;
}

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static const char* parse_lo16 ( CGEN_CPU_DESC  cd,
const char **  strp,
int  opindex,
unsigned long valuep 
) [static]

Definition at line 257 of file iq2000-asm.c.

{
  if (strncasecmp (*strp, "%lo(", 4) == 0)
    {
      const char *errmsg;
      enum cgen_parse_operand_result result_type;
      bfd_vma value;

      *strp += 4;
      errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_LO16,
                               & result_type, & value);
      if (**strp != ')')
       return MISSING_CLOSING_PARENTHESIS;
      ++*strp;
      if (errmsg == NULL
         && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
       value &= 0xffff;
      *valuep = value;
      return errmsg;
    }

  return parse_imm (cd, strp, opindex, valuep);
}

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static const char* parse_mimm ( CGEN_CPU_DESC  cd,
const char **  strp,
int  opindex,
unsigned long valuep 
) [static]

Definition at line 102 of file iq2000-asm.c.

{
  const char *errmsg;

  /* Verify this isn't a register.  */
  if (iq2000_cgen_isa_register (strp))
    errmsg = _("immediate value cannot be register");
  else
    {
      long value;
      
      errmsg = cgen_parse_signed_integer (cd, strp, opindex, & value);
      if (errmsg == NULL)
       {
         long x = (-value) & 0xFFFF0000;

         if (x != 0 && x != (long) 0xFFFF0000)
           errmsg = _("immediate value out of range");
         else
           *valuep = (-value & 0xFFFF);
       }
    }
  return errmsg;
}

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static const char* parse_mlo16 ( CGEN_CPU_DESC  cd,
const char **  strp,
int  opindex,
unsigned long valuep 
) [static]

Definition at line 289 of file iq2000-asm.c.

{
  if (strncasecmp (*strp, "%lo(", 4) == 0)
    {
      const char *errmsg;
      enum cgen_parse_operand_result result_type;
      bfd_vma value;

      *strp += 4;
      errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_LO16,
                               & result_type, & value);
      if (**strp != ')')
       return MISSING_CLOSING_PARENTHESIS;
      ++*strp;
      if (errmsg == NULL
         && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
       value = (-value) & 0xffff;
      *valuep = value;
      return errmsg;
    }

  return parse_mimm (cd, strp, opindex, valuep);
}

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Variable Documentation

Initial value:

Definition at line 465 of file iq2000-asm.c.

const char* MISSING_CLOSING_PARENTHESIS = N_("missing `)'") [static]

Definition at line 55 of file iq2000-asm.c.