1 /* tc-xc16x.c -- Assembler for the Infineon XC16X.
2 Copyright 2006, 2007 Free Software Foundation, Inc.
3 Contributed by KPIT Cummins Infosystems
5 This file is part of GAS, the GNU Assembler.
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)
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.
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
24 #include "safe-ctype.h"
27 #include "opcodes/xc16x-desc.h"
28 #include "opcodes/xc16x-opc.h"
30 #include "dwarf2dbg.h"
34 #include "elf/xc16x.h"
37 /* Structure to hold all of the different components describing
38 an individual instruction. */
41 const CGEN_INSN * insn;
42 const CGEN_INSN * orig_insn;
45 CGEN_INSN_INT buffer [1];
46 #define INSN_VALUE(buf) (*(buf))
48 unsigned char buffer [CGEN_MAX_INSN_SIZE];
49 #define INSN_VALUE(buf) (buf)
54 fixS * fixups [GAS_CGEN_MAX_FIXUPS];
55 int indices [MAX_OPERAND_INSTANCES];
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";
65 #define XC16X_SHORTOPTS ""
66 const char * md_shortopts = XC16X_SHORTOPTS;
68 struct option md_longopts[] =
70 {NULL, no_argument, NULL, 0}
72 size_t md_longopts_size = sizeof (md_longopts);
75 xc16xlmode (int arg ATTRIBUTE_UNUSED)
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"));
83 xc16xsmode (int arg ATTRIBUTE_UNUSED)
85 if (!bfd_set_arch_mach (stdoutput, bfd_arch_xc16x, bfd_mach_xc16xs))
86 as_warn (_("could not set architecture and machine"));
90 xc16xmode (int arg ATTRIBUTE_UNUSED)
92 if (!bfd_set_arch_mach (stdoutput, bfd_arch_xc16x, bfd_mach_xc16x))
93 as_warn (_("could not set architecture and machine"));
96 /* The target specific pseudo-ops which we support. */
97 const pseudo_typeS md_pseudo_table[] =
100 {"xc16xl", xc16xlmode, 0},
101 {"xc16xs", xc16xsmode, 0},
102 {"xc16x", xc16xmode, 0},
109 /* Initialize the `cgen' interface. */
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,
116 xc16x_cgen_init_asm (gas_cgen_cpu_desc);
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);
123 md_assemble (char *str)
128 /* Initialize GAS's cgen interface for a new instruction. */
129 gas_cgen_init_parse ();
131 insn.insn = xc16x_cgen_assemble_insn
132 (gas_cgen_cpu_desc, str, & insn.fields, insn.buffer, & errmsg);
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);
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. */
149 bfd_reloc_code_real_type
150 md_cgen_lookup_reloc (const CGEN_INSN *insn ATTRIBUTE_UNUSED,
151 const CGEN_OPERAND *operand,
154 switch (operand->type)
156 case XC16X_OPERAND_REL:
159 return BFD_RELOC_8_PCREL;
161 case XC16X_OPERAND_CADDR:
165 case XC16X_OPERAND_UIMM7:
168 return BFD_RELOC_8_PCREL;
170 case XC16X_OPERAND_UIMM16:
171 case XC16X_OPERAND_MEMORY:
175 case XC16X_OPERAND_UPOF16:
177 return BFD_RELOC_XC16X_POF;
179 case XC16X_OPERAND_UPAG16:
181 return BFD_RELOC_XC16X_PAG;
183 case XC16X_OPERAND_USEG8:
185 return BFD_RELOC_XC16X_SEG;
187 case XC16X_OPERAND_USEG16:
188 case XC16X_OPERAND_USOF16:
190 return BFD_RELOC_XC16X_SOF;
192 default : /* avoid -Wall warning */
197 return BFD_RELOC_XC16X_SOF;
200 /* Write a value out to the object file, using the appropriate endianness. */
203 md_number_to_chars (char * buf, valueT val, int n)
205 number_to_chars_littleendian (buf, val, n);
209 md_show_usage (FILE * stream)
211 fprintf (stream, _(" XC16X specific command line options:\n"));
215 md_parse_option (int c ATTRIBUTE_UNUSED,
216 char *arg ATTRIBUTE_UNUSED)
221 /* Turn a string in input_line_pointer into a floating point constant
222 of type TYPE, and store the appropriate bytes in *LITP. The number
223 of LITTLENUMS emitted is stored in *SIZEP. An error message is
224 returned, or NULL on OK. */
226 /* Equal to MAX_PRECISION in atof-ieee.c. */
227 #define MAX_LITTLENUMS 6
230 md_atof (int type, char *litP, int *sizeP)
234 LITTLENUM_TYPE words[MAX_LITTLENUMS];
253 /* FIXME: Some targets allow other format chars for bigger sizes
258 return _("Bad call to md_atof()");
261 t = atof_ieee (input_line_pointer, type, words);
263 input_line_pointer = t;
264 *sizeP = prec * sizeof (LITTLENUM_TYPE);
266 for (i = prec - 1; i >= 0; i--)
268 md_number_to_chars (litP, (valueT) words[i],
269 sizeof (LITTLENUM_TYPE));
270 litP += sizeof (LITTLENUM_TYPE);
277 md_section_align (segT segment, valueT size)
279 int align = bfd_get_section_alignment (stdoutput, segment);
280 return ((size + (1 << align) - 1) & (-1 << align));
284 md_undefined_symbol (char *name ATTRIBUTE_UNUSED)
290 md_estimate_size_before_relax (fragS *fragP ATTRIBUTE_UNUSED,
291 segT segment_type ATTRIBUTE_UNUSED)
293 printf (_("call tomd_estimate_size_before_relax \n"));
299 md_pcrel_from (fixS *fixP)
302 temp_val=fixP->fx_size + fixP->fx_where + fixP->fx_frag->fr_address;
308 md_pcrel_from_section (fixS *fixP, segT sec)
310 if (fixP->fx_addsy != (symbolS *) NULL
311 && (! S_IS_DEFINED (fixP->fx_addsy)
312 || S_GET_SEGMENT (fixP->fx_addsy) != sec
313 || S_IS_EXTERNAL (fixP->fx_addsy)
314 || S_IS_WEAK (fixP->fx_addsy)))
319 return md_pcrel_from (fixP);
323 tc_gen_reloc (asection *section ATTRIBUTE_UNUSED, fixS *fixp)
326 bfd_reloc_code_real_type r_type;
328 if (fixp->fx_addsy && fixp->fx_subsy)
330 if ((S_GET_SEGMENT (fixp->fx_addsy) != S_GET_SEGMENT (fixp->fx_subsy))
331 || S_GET_SEGMENT (fixp->fx_addsy) == undefined_section)
333 as_bad_where (fixp->fx_file, fixp->fx_line,
334 "Difference of symbols in different sections is not supported");
339 rel = xmalloc (sizeof (arelent));
340 rel->sym_ptr_ptr = xmalloc (sizeof (asymbol *));
341 *rel->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
342 rel->address = fixp->fx_frag->fr_address + fixp->fx_where;
343 rel->addend = fixp->fx_offset;
345 r_type = fixp->fx_r_type;
349 fprintf (stderr, "%s\n", bfd_get_reloc_code_name (r_type));
353 rel->howto = bfd_reloc_type_lookup (stdoutput, r_type);
354 if (rel->howto == NULL)
356 as_bad_where (fixp->fx_file, fixp->fx_line,
357 _("Cannot represent relocation type %s"),
358 bfd_get_reloc_code_name (r_type));
366 md_apply_fix (fixS *fixP, valueT *valP, segT seg ATTRIBUTE_UNUSED)
368 if(!strstr (seg->name,".debug"))
374 *valP = *valP * (-1);
376 *valP = 256 - (*valP);
380 gas_cgen_md_apply_fix (fixP, valP, seg);
385 md_convert_frag (bfd *headers ATTRIBUTE_UNUSED,
386 segT seg ATTRIBUTE_UNUSED,
387 fragS *fragP ATTRIBUTE_UNUSED)
389 printf (_("call to md_convert_frag \n"));