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/* tc-xc16x.c -- Assembler for the Infineon XC16X.
   Copyright 2006, 2007, 2009  Free Software Foundation, Inc.
   Contributed by KPIT Cummins Infosystems
 
   This file is part of GAS, the GNU Assembler.
 
   GAS 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 3, or (at your option)
   any later version.
 
   GAS 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 GAS; see the file COPYING.  If not, write to the Free
   Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
   02110-1301, USA.  */
 
 
#include "as.h"
#include "safe-ctype.h"
#include "subsegs.h"
#include "symcat.h"
#include "opcodes/xc16x-desc.h"
#include "opcodes/xc16x-opc.h"
#include "cgen.h"
#include "dwarf2dbg.h"
 
 
#ifdef OBJ_ELF
#include "elf/xc16x.h"
#endif
 
/* Structure to hold all of the different components describing
   an individual instruction.  */
typedef struct
{
  const CGEN_INSN *     insn;
  const CGEN_INSN *     orig_insn;
  CGEN_FIELDS           fields;
#if CGEN_INT_INSN_P
  CGEN_INSN_INT         buffer [1];
#define INSN_VALUE(buf) (*(buf))
#else
  unsigned char buffer [CGEN_MAX_INSN_SIZE];
#define INSN_VALUE(buf) (buf)
#endif
  char *                addr;
  fragS *               frag;
  int                   num_fixups;
  fixS *                fixups [GAS_CGEN_MAX_FIXUPS];
  int                   indices [MAX_OPERAND_INSTANCES];
}
xc16x_insn;
 
const char comment_chars[]        = ";";
const char line_comment_chars[]   = "#";
const char line_separator_chars[] = "";
const char EXP_CHARS[]            = "eE";
const char FLT_CHARS[]            = "dD";
 
#define XC16X_SHORTOPTS ""
const char * md_shortopts = XC16X_SHORTOPTS;
 
struct option md_longopts[] =
{
  {NULL, no_argument, NULL, 0}
};
size_t md_longopts_size = sizeof (md_longopts);
 
static void
xc16xlmode (int arg ATTRIBUTE_UNUSED)
{
 if (stdoutput != NULL)
  if (!bfd_set_arch_mach (stdoutput, bfd_arch_xc16x, bfd_mach_xc16xl))
    as_warn (_("could not set architecture and machine"));
}
 
static void
xc16xsmode (int arg ATTRIBUTE_UNUSED)
{
  if (!bfd_set_arch_mach (stdoutput, bfd_arch_xc16x, bfd_mach_xc16xs))
    as_warn (_("could not set architecture and machine"));
}
 
static void
xc16xmode (int arg ATTRIBUTE_UNUSED)
{
  if (!bfd_set_arch_mach (stdoutput, bfd_arch_xc16x, bfd_mach_xc16x))
    as_warn (_("could not set architecture and machine"));
}
 
/* The target specific pseudo-ops which we support.  */
const pseudo_typeS md_pseudo_table[] =
{
  { "word",     cons,           2 },
  {"xc16xl",  xc16xlmode,  0},
  {"xc16xs", xc16xsmode, 0},
  {"xc16x",  xc16xmode,  0},
  { NULL,       NULL,           0 }
};
 
void
md_begin (void)
{
  /* Initialize the `cgen' interface.  */
 
  /* Set the machine number and endian.  */
  gas_cgen_cpu_desc = xc16x_cgen_cpu_open (CGEN_CPU_OPEN_MACHS, 0,
                                           CGEN_CPU_OPEN_ENDIAN,
                                           CGEN_ENDIAN_LITTLE,
                                           CGEN_CPU_OPEN_END);
  xc16x_cgen_init_asm (gas_cgen_cpu_desc);
 
  /* This is a callback from cgen to gas to parse operands.  */
  cgen_set_parse_operand_fn (gas_cgen_cpu_desc, gas_cgen_parse_operand);
}
 
void
md_assemble (char *str)
{
  xc16x_insn insn;
  char *errmsg;
 
  /* Initialize GAS's cgen interface for a new instruction.  */
  gas_cgen_init_parse ();
 
  insn.insn = xc16x_cgen_assemble_insn
    (gas_cgen_cpu_desc, str, & insn.fields, insn.buffer, & errmsg);
 
  if (!insn.insn)
    {
      as_bad ("%s", errmsg);
      return;
    }
 
  /* Doesn't really matter what we pass for RELAX_P here.  */
  gas_cgen_finish_insn (insn.insn, insn.buffer,
                        CGEN_FIELDS_BITSIZE (& insn.fields), 1, NULL);
}
 
/* Return the bfd reloc type for OPERAND of INSN at fixup FIXP.
   Returns BFD_RELOC_NONE if no reloc type can be found.
   *FIXP may be modified if desired.  */
 
bfd_reloc_code_real_type
md_cgen_lookup_reloc (const CGEN_INSN *insn ATTRIBUTE_UNUSED,
                      const CGEN_OPERAND *operand,
                      fixS *fixP)
{
  switch (operand->type)
    {
    case XC16X_OPERAND_REL:
      /* ??? Adjust size?  */
      fixP->fx_where += 1;
      fixP->fx_pcrel = 1;
      return BFD_RELOC_8_PCREL;
 
    case XC16X_OPERAND_CADDR:
      fixP->fx_size = 2;
      fixP->fx_where += 2;
      return BFD_RELOC_16;
 
    case XC16X_OPERAND_UIMM7:
      /* ??? Adjust size?  */
      fixP->fx_where += 1;
      fixP->fx_pcrel = 1;
      return BFD_RELOC_8_PCREL;
 
    case XC16X_OPERAND_UIMM16:
    case XC16X_OPERAND_MEMORY:
      fixP->fx_size = 2;
      fixP->fx_where += 2;
      return BFD_RELOC_16;
 
    case XC16X_OPERAND_UPOF16:
      fixP->fx_size = 2;
      fixP->fx_where += 2;
      return BFD_RELOC_XC16X_POF;
 
    case XC16X_OPERAND_UPAG16:
      fixP->fx_size = 2;
      fixP->fx_where += 2;
      return BFD_RELOC_XC16X_PAG;
 
    case XC16X_OPERAND_USEG8:
      /* ??? This is an 8 bit field, why the 16 bit reloc?  */
      fixP->fx_where += 1;
      return BFD_RELOC_XC16X_SEG;
 
    case XC16X_OPERAND_USEG16:
    case  XC16X_OPERAND_USOF16:
      fixP->fx_size = 2;
      fixP->fx_where += 2;
      return BFD_RELOC_XC16X_SOF;
 
    default : /* Avoid -Wall warning.  */
      break;
    }
 
  return BFD_RELOC_NONE;
}
 
/* Write a value out to the object file, using the appropriate endianness.  */
 
void
md_number_to_chars (char * buf, valueT val, int n)
{
  number_to_chars_littleendian (buf, val, n);
}
 
void
md_show_usage (FILE * stream)
{
  fprintf (stream, _(" XC16X specific command line options:\n"));
}
 
int
md_parse_option (int c ATTRIBUTE_UNUSED,
                 char *arg ATTRIBUTE_UNUSED)
{
  return 0;
}
 
char *
md_atof (int type, char *litP, int *sizeP)
{
  return ieee_md_atof (type, litP, sizeP, FALSE);
}
 
valueT
md_section_align (segT segment, valueT size)
{
  int align = bfd_get_section_alignment (stdoutput, segment);
  return ((size + (1 << align) - 1) & (-1 << align));
}
 
symbolS *
md_undefined_symbol (char *name ATTRIBUTE_UNUSED)
{
  return NULL;
}
 
int
md_estimate_size_before_relax (fragS *fragP ATTRIBUTE_UNUSED,
                               segT segment_type ATTRIBUTE_UNUSED)
{
  printf (_("call to md_estimate_size_before_relax \n"));
  abort ();
}
 
 
long
md_pcrel_from (fixS *fixP)
{
  long temp_val;
  temp_val=fixP->fx_size + fixP->fx_where + fixP->fx_frag->fr_address;
 
  return temp_val;
}
 
long
md_pcrel_from_section (fixS *fixP, segT sec)
{
  if (fixP->fx_addsy != (symbolS *) NULL
      && (! S_IS_DEFINED (fixP->fx_addsy)
          || S_GET_SEGMENT (fixP->fx_addsy) != sec
          || S_IS_EXTERNAL (fixP->fx_addsy)
          || S_IS_WEAK (fixP->fx_addsy)))
    {
      return 0;
    }
 
  return md_pcrel_from (fixP);
}
 
arelent *
tc_gen_reloc (asection *section ATTRIBUTE_UNUSED, fixS *fixp)
{
  arelent *rel;
  bfd_reloc_code_real_type r_type;
 
  if (fixp->fx_addsy && fixp->fx_subsy)
    {
      if ((S_GET_SEGMENT (fixp->fx_addsy) != S_GET_SEGMENT (fixp->fx_subsy))
          || S_GET_SEGMENT (fixp->fx_addsy) == undefined_section)
        {
          as_bad_where (fixp->fx_file, fixp->fx_line,
                        _("Difference of symbols in different sections is not supported"));
          return NULL;
        }
    }
 
  rel = xmalloc (sizeof (arelent));
  rel->sym_ptr_ptr = xmalloc (sizeof (asymbol *));
  *rel->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
  rel->address = fixp->fx_frag->fr_address + fixp->fx_where;
  rel->addend = fixp->fx_offset;
 
  r_type = fixp->fx_r_type;
 
#define DEBUG 0
#if DEBUG
  fprintf (stderr, "%s\n", bfd_get_reloc_code_name (r_type));
  fflush (stderr);
#endif
 
  rel->howto = bfd_reloc_type_lookup (stdoutput, r_type);
   if (rel->howto == NULL)
    {
      as_bad_where (fixp->fx_file, fixp->fx_line,
                    _("Cannot represent relocation type %s"),
                    bfd_get_reloc_code_name (r_type));
      return NULL;
    }
 
  return rel;
}
 
void
md_apply_fix (fixS *fixP, valueT *valP, segT seg ATTRIBUTE_UNUSED)
{
  if (!strstr (seg->name,".debug"))
    {
      if (*valP < 128)
        *valP /= 2;
      if (*valP>268435455)
        {
          *valP = *valP * (-1);
          *valP /= 2;
          *valP = 256 - (*valP);
        }
    }
 
  gas_cgen_md_apply_fix (fixP, valP, seg);
  return;
}
 
void
md_convert_frag (bfd *headers ATTRIBUTE_UNUSED,
                 segT seg ATTRIBUTE_UNUSED,
                 fragS *fragP ATTRIBUTE_UNUSED)
{
  printf (_("call to md_convert_frag \n"));
  abort ();
}

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[/] [open8_urisc/] [trunk/] [gnu/] [binutils/] [gas/] [config/] [tc-xc16x.c] - Blame information for rev 54

Line No.	Rev	Author	Line
1	16	khays	`/* tc-xc16x.c -- Assembler for the Infineon XC16X.`
2			`Copyright 2006, 2007, 2009 Free Software Foundation, Inc.`
3			`Contributed by KPIT Cummins Infosystems`
4
5			`This file is part of GAS, the GNU Assembler.`
6
7			`GAS is free software; you can redistribute it and/or modify`
8			`it under the terms of the GNU General Public License as published by`
9			`the Free Software Foundation; either version 3, or (at your option)`
10			`any later version.`
11
12			`GAS is distributed in the hope that it will be useful,`
13			`but WITHOUT ANY WARRANTY; without even the implied warranty of`
14			`MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the`
15			`GNU General Public License for more details.`
16
17			`You should have received a copy of the GNU General Public License`
18			`along with GAS; see the file COPYING. If not, write to the Free`
19			`Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA`
20			`02110-1301, USA. */`
21
22
23			`#include "as.h"`
24			`#include "safe-ctype.h"`
25			`#include "subsegs.h"`
26			`#include "symcat.h"`
27			`#include "opcodes/xc16x-desc.h"`
28			`#include "opcodes/xc16x-opc.h"`
29			`#include "cgen.h"`
30			`#include "dwarf2dbg.h"`
31
32
33			`#ifdef OBJ_ELF`
34			`#include "elf/xc16x.h"`
35			`#endif`
36
37			`/* Structure to hold all of the different components describing`
38			`an individual instruction. */`
39			`typedef struct`
40			`{`
41			`const CGEN_INSN * insn;`
42			`const CGEN_INSN * orig_insn;`
43			`CGEN_FIELDS fields;`
44			`#if CGEN_INT_INSN_P`
45			`CGEN_INSN_INT buffer [1];`
46			`#define INSN_VALUE(buf) (*(buf))`
47			`#else`
48			`unsigned char buffer [CGEN_MAX_INSN_SIZE];`
49			`#define INSN_VALUE(buf) (buf)`
50			`#endif`
51			`char * addr;`
52			`fragS * frag;`
53			`int num_fixups;`
54			`fixS * fixups [GAS_CGEN_MAX_FIXUPS];`
55			`int indices [MAX_OPERAND_INSTANCES];`
56			`}`
57			`xc16x_insn;`
58
59			`const char comment_chars[] = ";";`
60			`const char line_comment_chars[] = "#";`
61			`const char line_separator_chars[] = "";`
62			`const char EXP_CHARS[] = "eE";`
63			`const char FLT_CHARS[] = "dD";`
64
65			`#define XC16X_SHORTOPTS ""`
66			`const char * md_shortopts = XC16X_SHORTOPTS;`
67
68			`struct option md_longopts[] =`
69			`{`
70			`{NULL, no_argument, NULL, 0}`
71			`};`
72			`size_t md_longopts_size = sizeof (md_longopts);`
73
74			`static void`
75			`xc16xlmode (int arg ATTRIBUTE_UNUSED)`
76			`{`
77			`if (stdoutput != NULL)`
78			`if (!bfd_set_arch_mach (stdoutput, bfd_arch_xc16x, bfd_mach_xc16xl))`
79			`as_warn (_("could not set architecture and machine"));`
80			`}`
81
82			`static void`
83			`xc16xsmode (int arg ATTRIBUTE_UNUSED)`
84			`{`
85			`if (!bfd_set_arch_mach (stdoutput, bfd_arch_xc16x, bfd_mach_xc16xs))`
86			`as_warn (_("could not set architecture and machine"));`
87			`}`
88
89			`static void`
90			`xc16xmode (int arg ATTRIBUTE_UNUSED)`
91			`{`
92			`if (!bfd_set_arch_mach (stdoutput, bfd_arch_xc16x, bfd_mach_xc16x))`
93			`as_warn (_("could not set architecture and machine"));`
94			`}`
95
96			`/* The target specific pseudo-ops which we support. */`
97			`const pseudo_typeS md_pseudo_table[] =`
98			`{`
99			`{ "word", cons, 2 },`
100			`{"xc16xl", xc16xlmode, 0},`
101			`{"xc16xs", xc16xsmode, 0},`
102			`{"xc16x", xc16xmode, 0},`
103			`{ NULL, NULL, 0 }`
104			`};`
105
106			`void`
107			`md_begin (void)`
108			`{`
109			/* Initialize the `cgen' interface. */
110
111			`/* Set the machine number and endian. */`
112			`gas_cgen_cpu_desc = xc16x_cgen_cpu_open (CGEN_CPU_OPEN_MACHS, 0,`
113			`CGEN_CPU_OPEN_ENDIAN,`
114			`CGEN_ENDIAN_LITTLE,`
115			`CGEN_CPU_OPEN_END);`
116			`xc16x_cgen_init_asm (gas_cgen_cpu_desc);`
117
118			`/* This is a callback from cgen to gas to parse operands. */`
119			`cgen_set_parse_operand_fn (gas_cgen_cpu_desc, gas_cgen_parse_operand);`
120			`}`
121
122			`void`
123			`md_assemble (char *str)`
124			`{`
125			`xc16x_insn insn;`
126			`char *errmsg;`
127
128			`/* Initialize GAS's cgen interface for a new instruction. */`
129			`gas_cgen_init_parse ();`
130
131			`insn.insn = xc16x_cgen_assemble_insn`
132			`(gas_cgen_cpu_desc, str, & insn.fields, insn.buffer, & errmsg);`
133
134			`if (!insn.insn)`
135			`{`
136			`as_bad ("%s", errmsg);`
137			`return;`
138			`}`
139
140			`/* Doesn't really matter what we pass for RELAX_P here. */`
141			`gas_cgen_finish_insn (insn.insn, insn.buffer,`
142			`CGEN_FIELDS_BITSIZE (& insn.fields), 1, NULL);`
143			`}`
144
145			`/* Return the bfd reloc type for OPERAND of INSN at fixup FIXP.`
146			`Returns BFD_RELOC_NONE if no reloc type can be found.`
147			`FIXP may be modified if desired. /`
148
149			`bfd_reloc_code_real_type`
150			`md_cgen_lookup_reloc (const CGEN_INSN *insn ATTRIBUTE_UNUSED,`
151			`const CGEN_OPERAND *operand,`
152			`fixS *fixP)`
153			`{`
154			`switch (operand->type)`
155			`{`
156			`case XC16X_OPERAND_REL:`
157			`/* ??? Adjust size? */`
158			`fixP->fx_where += 1;`
159			`fixP->fx_pcrel = 1;`
160			`return BFD_RELOC_8_PCREL;`
161
162			`case XC16X_OPERAND_CADDR:`
163			`fixP->fx_size = 2;`
164			`fixP->fx_where += 2;`
165			`return BFD_RELOC_16;`
166
167			`case XC16X_OPERAND_UIMM7:`
168			`/* ??? Adjust size? */`
169			`fixP->fx_where += 1;`
170			`fixP->fx_pcrel = 1;`
171			`return BFD_RELOC_8_PCREL;`
172
173			`case XC16X_OPERAND_UIMM16:`
174			`case XC16X_OPERAND_MEMORY:`
175			`fixP->fx_size = 2;`
176			`fixP->fx_where += 2;`
177			`return BFD_RELOC_16;`
178
179			`case XC16X_OPERAND_UPOF16:`
180			`fixP->fx_size = 2;`
181			`fixP->fx_where += 2;`
182			`return BFD_RELOC_XC16X_POF;`
183
184			`case XC16X_OPERAND_UPAG16:`
185			`fixP->fx_size = 2;`
186			`fixP->fx_where += 2;`
187			`return BFD_RELOC_XC16X_PAG;`
188
189			`case XC16X_OPERAND_USEG8:`
190			`/* ??? This is an 8 bit field, why the 16 bit reloc? */`
191			`fixP->fx_where += 1;`
192			`return BFD_RELOC_XC16X_SEG;`
193
194			`case XC16X_OPERAND_USEG16:`
195			`case XC16X_OPERAND_USOF16:`
196			`fixP->fx_size = 2;`
197			`fixP->fx_where += 2;`
198			`return BFD_RELOC_XC16X_SOF;`
199
200			`default : /* Avoid -Wall warning. */`
201			`break;`
202			`}`
203
204			`return BFD_RELOC_NONE;`
205			`}`
206
207			`/* Write a value out to the object file, using the appropriate endianness. */`
208
209			`void`
210			`md_number_to_chars (char * buf, valueT val, int n)`
211			`{`
212			`number_to_chars_littleendian (buf, val, n);`
213			`}`
214
215			`void`
216			`md_show_usage (FILE * stream)`
217			`{`
218			`fprintf (stream, _(" XC16X specific command line options:\n"));`
219			`}`
220
221			`int`
222			`md_parse_option (int c ATTRIBUTE_UNUSED,`
223			`char *arg ATTRIBUTE_UNUSED)`
224			`{`
225			`return 0;`
226			`}`
227
228			`char *`
229			`md_atof (int type, char litP, int sizeP)`
230			`{`
231			`return ieee_md_atof (type, litP, sizeP, FALSE);`
232			`}`
233
234			`valueT`
235			`md_section_align (segT segment, valueT size)`
236			`{`
237			`int align = bfd_get_section_alignment (stdoutput, segment);`
238			`return ((size + (1 << align) - 1) & (-1 << align));`
239			`}`
240
241			`symbolS *`
242			`md_undefined_symbol (char *name ATTRIBUTE_UNUSED)`
243			`{`
244			`return NULL;`
245			`}`
246
247			`int`
248			`md_estimate_size_before_relax (fragS *fragP ATTRIBUTE_UNUSED,`
249			`segT segment_type ATTRIBUTE_UNUSED)`
250			`{`
251			`printf (_("call to md_estimate_size_before_relax \n"));`
252			`abort ();`
253			`}`
254
255
256			`long`
257			`md_pcrel_from (fixS *fixP)`
258			`{`
259			`long temp_val;`
260			`temp_val=fixP->fx_size + fixP->fx_where + fixP->fx_frag->fr_address;`
261
262			`return temp_val;`
263			`}`
264
265			`long`
266			`md_pcrel_from_section (fixS *fixP, segT sec)`
267			`{`
268			`if (fixP->fx_addsy != (symbolS *) NULL`
269			`&& (! S_IS_DEFINED (fixP->fx_addsy)`
270			`\|\| S_GET_SEGMENT (fixP->fx_addsy) != sec`
271			`\|\| S_IS_EXTERNAL (fixP->fx_addsy)`
272			`\|\| S_IS_WEAK (fixP->fx_addsy)))`
273			`{`
274			`return 0;`
275			`}`
276
277			`return md_pcrel_from (fixP);`
278			`}`
279
280			`arelent *`
281			`tc_gen_reloc (asection section ATTRIBUTE_UNUSED, fixS fixp)`
282			`{`
283			`arelent *rel;`
284			`bfd_reloc_code_real_type r_type;`
285
286			`if (fixp->fx_addsy && fixp->fx_subsy)`
287			`{`
288			`if ((S_GET_SEGMENT (fixp->fx_addsy) != S_GET_SEGMENT (fixp->fx_subsy))`
289			`\|\| S_GET_SEGMENT (fixp->fx_addsy) == undefined_section)`
290			`{`
291			`as_bad_where (fixp->fx_file, fixp->fx_line,`
292			`_("Difference of symbols in different sections is not supported"));`
293			`return NULL;`
294			`}`
295			`}`
296
297			`rel = xmalloc (sizeof (arelent));`
298			`rel->sym_ptr_ptr = xmalloc (sizeof (asymbol *));`
299			`*rel->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);`
300			`rel->address = fixp->fx_frag->fr_address + fixp->fx_where;`
301			`rel->addend = fixp->fx_offset;`
302
303			`r_type = fixp->fx_r_type;`
304
305			`#define DEBUG 0`
306			`#if DEBUG`
307			`fprintf (stderr, "%s\n", bfd_get_reloc_code_name (r_type));`
308			`fflush (stderr);`
309			`#endif`
310
311			`rel->howto = bfd_reloc_type_lookup (stdoutput, r_type);`
312			`if (rel->howto == NULL)`
313			`{`
314			`as_bad_where (fixp->fx_file, fixp->fx_line,`
315			`_("Cannot represent relocation type %s"),`
316			`bfd_get_reloc_code_name (r_type));`
317			`return NULL;`
318			`}`
319
320			`return rel;`
321			`}`
322
323			`void`
324			`md_apply_fix (fixS fixP, valueT valP, segT seg ATTRIBUTE_UNUSED)`
325			`{`
326			`if (!strstr (seg->name,".debug"))`
327			`{`
328			`if (*valP < 128)`
329			`*valP /= 2;`
330			`if (*valP>268435455)`
331			`{`
332			`valP = valP * (-1);`
333			`*valP /= 2;`
334			`valP = 256 - (valP);`
335			`}`
336			`}`
337
338			`gas_cgen_md_apply_fix (fixP, valP, seg);`
339			`return;`
340			`}`
341
342			`void`
343			`md_convert_frag (bfd *headers ATTRIBUTE_UNUSED,`
344			`segT seg ATTRIBUTE_UNUSED,`
345			`fragS *fragP ATTRIBUTE_UNUSED)`
346			`{`
347			`printf (_("call to md_convert_frag \n"));`
348			`abort ();`
349			`}`