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[/] [openrisc/] [trunk/] [gnu-src/] [binutils-2.18.50/] [gas/] [config/] [tc-xc16x.c] - Blame information for rev 156

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/* tc-xc16x.c -- Assembler for the Infineon XC16X.
   Copyright 2006, 2007 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 (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:
      fixP->fx_where += 1;
      fixP->fx_pcrel = 1;
      return BFD_RELOC_8_PCREL;
 
    case XC16X_OPERAND_CADDR:
      fixP->fx_where += 2;
      return BFD_RELOC_16;
 
    case XC16X_OPERAND_UIMM7:
      fixP->fx_where += 1;
      fixP->fx_pcrel = 1;
      return BFD_RELOC_8_PCREL;
 
    case XC16X_OPERAND_UIMM16:
    case XC16X_OPERAND_MEMORY:
      fixP->fx_where += 2;
      return BFD_RELOC_16;
 
    case XC16X_OPERAND_UPOF16:
      fixP->fx_where += 2;
      return BFD_RELOC_XC16X_POF;
 
    case XC16X_OPERAND_UPAG16:
      fixP->fx_where += 2;
      return BFD_RELOC_XC16X_PAG;
 
    case XC16X_OPERAND_USEG8:
      fixP->fx_where += 1;
      return BFD_RELOC_XC16X_SEG;
 
    case XC16X_OPERAND_USEG16:
    case  XC16X_OPERAND_USOF16:
      fixP->fx_where += 2;
      return BFD_RELOC_XC16X_SOF;
 
    default : /* Avoid -Wall warning.  */
      break;
    }
 
  fixP->fx_where += 2;
  return BFD_RELOC_XC16X_SOF;
}
 
/* 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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[/] [openrisc/] [trunk/] [gnu-src/] [binutils-2.18.50/] [gas/] [config/] [tc-xc16x.c] - Blame information for rev 156

Line No.	Rev	Author	Line
1	38	julius	`/* tc-xc16x.c -- Assembler for the Infineon XC16X.`
2			`Copyright 2006, 2007 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 (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			`fixP->fx_where += 1;`
158			`fixP->fx_pcrel = 1;`
159			`return BFD_RELOC_8_PCREL;`
160
161			`case XC16X_OPERAND_CADDR:`
162			`fixP->fx_where += 2;`
163			`return BFD_RELOC_16;`
164
165			`case XC16X_OPERAND_UIMM7:`
166			`fixP->fx_where += 1;`
167			`fixP->fx_pcrel = 1;`
168			`return BFD_RELOC_8_PCREL;`
169
170			`case XC16X_OPERAND_UIMM16:`
171			`case XC16X_OPERAND_MEMORY:`
172			`fixP->fx_where += 2;`
173			`return BFD_RELOC_16;`
174
175			`case XC16X_OPERAND_UPOF16:`
176			`fixP->fx_where += 2;`
177			`return BFD_RELOC_XC16X_POF;`
178
179			`case XC16X_OPERAND_UPAG16:`
180			`fixP->fx_where += 2;`
181			`return BFD_RELOC_XC16X_PAG;`
182
183			`case XC16X_OPERAND_USEG8:`
184			`fixP->fx_where += 1;`
185			`return BFD_RELOC_XC16X_SEG;`
186
187			`case XC16X_OPERAND_USEG16:`
188			`case XC16X_OPERAND_USOF16:`
189			`fixP->fx_where += 2;`
190			`return BFD_RELOC_XC16X_SOF;`
191
192			`default : /* Avoid -Wall warning. */`
193			`break;`
194			`}`
195
196			`fixP->fx_where += 2;`
197			`return BFD_RELOC_XC16X_SOF;`
198			`}`
199
200			`/* Write a value out to the object file, using the appropriate endianness. */`
201
202			`void`
203			`md_number_to_chars (char * buf, valueT val, int n)`
204			`{`
205			`number_to_chars_littleendian (buf, val, n);`
206			`}`
207
208			`void`
209			`md_show_usage (FILE * stream)`
210			`{`
211			`fprintf (stream, _(" XC16X specific command line options:\n"));`
212			`}`
213
214			`int`
215			`md_parse_option (int c ATTRIBUTE_UNUSED,`
216			`char *arg ATTRIBUTE_UNUSED)`
217			`{`
218			`return 0;`
219			`}`
220
221			`char *`
222			`md_atof (int type, char litP, int sizeP)`
223			`{`
224			`return ieee_md_atof (type, litP, sizeP, FALSE);`
225			`}`
226
227			`valueT`
228			`md_section_align (segT segment, valueT size)`
229			`{`
230			`int align = bfd_get_section_alignment (stdoutput, segment);`
231			`return ((size + (1 << align) - 1) & (-1 << align));`
232			`}`
233
234			`symbolS *`
235			`md_undefined_symbol (char *name ATTRIBUTE_UNUSED)`
236			`{`
237			`return NULL;`
238			`}`
239
240			`int`
241			`md_estimate_size_before_relax (fragS *fragP ATTRIBUTE_UNUSED,`
242			`segT segment_type ATTRIBUTE_UNUSED)`
243			`{`
244			`printf (_("call to md_estimate_size_before_relax \n"));`
245			`abort ();`
246			`}`
247
248
249			`long`
250			`md_pcrel_from (fixS *fixP)`
251			`{`
252			`long temp_val;`
253			`temp_val=fixP->fx_size + fixP->fx_where + fixP->fx_frag->fr_address;`
254
255			`return temp_val;`
256			`}`
257
258			`long`
259			`md_pcrel_from_section (fixS *fixP, segT sec)`
260			`{`
261			`if (fixP->fx_addsy != (symbolS *) NULL`
262			`&& (! S_IS_DEFINED (fixP->fx_addsy)`
263			`\|\| S_GET_SEGMENT (fixP->fx_addsy) != sec`
264			`\|\| S_IS_EXTERNAL (fixP->fx_addsy)`
265			`\|\| S_IS_WEAK (fixP->fx_addsy)))`
266			`{`
267			`return 0;`
268			`}`
269
270			`return md_pcrel_from (fixP);`
271			`}`
272
273			`arelent *`
274			`tc_gen_reloc (asection section ATTRIBUTE_UNUSED, fixS fixp)`
275			`{`
276			`arelent *rel;`
277			`bfd_reloc_code_real_type r_type;`
278
279			`if (fixp->fx_addsy && fixp->fx_subsy)`
280			`{`
281			`if ((S_GET_SEGMENT (fixp->fx_addsy) != S_GET_SEGMENT (fixp->fx_subsy))`
282			`\|\| S_GET_SEGMENT (fixp->fx_addsy) == undefined_section)`
283			`{`
284			`as_bad_where (fixp->fx_file, fixp->fx_line,`
285			`_("Difference of symbols in different sections is not supported"));`
286			`return NULL;`
287			`}`
288			`}`
289
290			`rel = xmalloc (sizeof (arelent));`
291			`rel->sym_ptr_ptr = xmalloc (sizeof (asymbol *));`
292			`*rel->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);`
293			`rel->address = fixp->fx_frag->fr_address + fixp->fx_where;`
294			`rel->addend = fixp->fx_offset;`
295
296			`r_type = fixp->fx_r_type;`
297
298			`#define DEBUG 0`
299			`#if DEBUG`
300			`fprintf (stderr, "%s\n", bfd_get_reloc_code_name (r_type));`
301			`fflush (stderr);`
302			`#endif`
303
304			`rel->howto = bfd_reloc_type_lookup (stdoutput, r_type);`
305			`if (rel->howto == NULL)`
306			`{`
307			`as_bad_where (fixp->fx_file, fixp->fx_line,`
308			`_("Cannot represent relocation type %s"),`
309			`bfd_get_reloc_code_name (r_type));`
310			`return NULL;`
311			`}`
312
313			`return rel;`
314			`}`
315
316			`void`
317			`md_apply_fix (fixS fixP, valueT valP, segT seg ATTRIBUTE_UNUSED)`
318			`{`
319			`if (!strstr (seg->name,".debug"))`
320			`{`
321			`if (*valP < 128)`
322			`*valP /= 2;`
323			`if (*valP>268435455)`
324			`{`
325			`valP = valP * (-1);`
326			`*valP /= 2;`
327			`valP = 256 - (valP);`
328			`}`
329			`}`
330
331			`gas_cgen_md_apply_fix (fixP, valP, seg);`
332			`return;`
333			`}`
334
335			`void`
336			`md_convert_frag (bfd *headers ATTRIBUTE_UNUSED,`
337			`segT seg ATTRIBUTE_UNUSED,`
338			`fragS *fragP ATTRIBUTE_UNUSED)`
339			`{`
340			`printf (_("call to md_convert_frag \n"));`
341			`abort ();`
342			`}`