/* tc-w65.c -- Assemble code for the W65816
- Copyright 1995, 1998, 2000, 2001, 2002 Free Software Foundation, Inc.
+ Copyright 1995, 1998, 2000, 2001, 2002, 2005
+ Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
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, 59 Temple Place - Suite 330, Boston, MA
- 02111-1307, USA. */
+ Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
+ 02110-1301, USA. */
/* Written By Steve Chamberlain <sac@cygnus.com>. */
#define DEFINE_TABLE
#include "../opcodes/w65-opc.h"
-const char comment_chars[] = "!";
+const char comment_chars[] = "!";
const char line_separator_chars[] = ";";
-const char line_comment_chars[] = "!#";
+const char line_comment_chars[] = "!#";
/* This table describes all the machine specific pseudo-ops the assembler
has to support. The fields are:
pseudo-op name without dot
function to call to execute this pseudo-op
- Integer arg to pass to the function */
+ Integer arg to pass to the function. */
#define OP_BCC 0x90
#define OP_BCS 0xB0
#define OP_BVC 0x50
#define OP_BVS 0x70
-static void s_longa PARAMS ((int));
-static char *parse_exp PARAMS ((char *));
-static char *get_operands PARAMS ((const struct opinfo *, char *));
-static const struct opinfo *get_specific PARAMS ((const struct opinfo *));
-static void build_Mytes PARAMS ((const struct opinfo *));
+static int M; /* M flag. */
+static int X; /* X flag. */
+/* This function is called once, at assembler startup time. This
+ should set up all the tables, etc that the MD part of the assembler
+ needs. */
+
+static void
+s_longa (int xmode)
+{
+ int *p = xmode ? &X : &M;
+
+ while (*input_line_pointer == ' ')
+ input_line_pointer++;
+ if (strncmp (input_line_pointer, "on", 2) == 0)
+ {
+ input_line_pointer += 2;
+ *p = 0;
+ }
+ else if (strncmp (input_line_pointer, "off", 3) == 0)
+ {
+ *p = 1;
+ input_line_pointer += 3;
+ }
+ else
+ as_bad (_("need on or off."));
+ demand_empty_rest_of_line ();
+}
-const pseudo_typeS md_pseudo_table[] = {
+const pseudo_typeS md_pseudo_table[] =
+{
{"int", cons, 2},
{"word", cons, 2},
{"longa", s_longa, 0},
{0, 0, 0}
};
-#if 0
-int md_reloc_size;
-#endif
-
const char EXP_CHARS[] = "eE";
/* Chars that mean this number is a floating point constant. */
/* Opcode mnemonics */
static struct hash_control *opcode_hash_control;
-int M; /* M flag */
-int X; /* X flag */
-
-#define C(a,b) ENCODE_RELAX(a,b)
-#define ENCODE_RELAX(what,length) (((what) << 2) + (length))
+#define C(a, b) ENCODE_RELAX(a,b)
+#define ENCODE_RELAX(what, length) (((what) << 2) + (length))
-#define GET_WHAT(x) ((x>>2))
+#define GET_WHAT(x) (((x) >> 2))
-#define BYTE_DISP 1
-#define WORD_DISP 2
+#define BYTE_DISP 1
+#define WORD_DISP 2
#define UNDEF_BYTE_DISP 0
#define UNDEF_WORD_DISP 3
-
#define COND_BRANCH 1
#define UNCOND_BRANCH 2
-#define END 3
+#define END 3
-#define BYTE_F 127 /* How far we can branch forwards */
-#define BYTE_B -126 /* How far we can branch backwards */
+#define BYTE_F 127 /* How far we can branch forwards. */
+#define BYTE_B -126 /* How far we can branch backwards. */
#define WORD_F 32767
#define WORD_B 32768
-relax_typeS md_relax_table[C (END, 0)] = {
+relax_typeS md_relax_table[C (END, 0)] =
+{
{ 0, 0, 0, 0 },
{ 0, 0, 0, 0 },
{ 0, 0, 0, 0 },
{ BYTE_F, BYTE_B, 2, C (UNCOND_BRANCH, WORD_DISP) }, /* BYTE_DISP */
{ WORD_F, WORD_B, 3, 0 }, /* WORD_DISP */
{ 0, 0, 3, 0 } /* UNDEF_WORD_DISP */
-
};
-/* This function is called once, at assembler startup time. This
- should set up all the tables, etc that the MD part of the assembler
- needs. */
-
-static void
-s_longa (xmode)
- int xmode;
-{
- int *p = xmode ? &X : &M;
- while (*input_line_pointer == ' ')
- input_line_pointer++;
- if (strncmp (input_line_pointer, "on", 2) == 0)
- {
- input_line_pointer += 2;
- *p = 0;
- }
- else if (strncmp (input_line_pointer, "off", 3) == 0)
- {
- *p = 1;
- input_line_pointer += 3;
- }
- else
- as_bad (_("need on or off."));
- demand_empty_rest_of_line ();
-}
-
void
-md_begin ()
+md_begin (void)
{
const struct opinfo *opcode;
char *prev_name = "";
flag_signed_overflow_ok = 1;
}
-static expressionS immediate; /* absolute expression */
-static expressionS immediate1; /* absolute expression */
+static expressionS immediate; /* Absolute expression. */
+static expressionS immediate1; /* Absolute expression. */
int expr_size;
int expr_shift;
int tc_cons_reloc;
void
-w65_expression (dest)
- expressionS *dest;
+w65_expression (expressionS *dest)
{
expr_size = 0;
expr_shift = 0;
int amode;
static char *
-parse_exp (s)
- char *s;
+parse_exp (char *s)
{
char *save;
char *new;
}
static char *
-get_operands (info, ptr)
- const struct opinfo *info;
- char *ptr;
+get_operands (const struct opinfo *info, char *ptr)
{
- register int override_len = 0;
- register int bytes = 0;
+ int override_len = 0;
+ int bytes = 0;
while (*ptr == ' ')
ptr++;
ptr += 2;
}
else
- {
- as_bad (_("syntax error after <exp"));
- }
+ as_bad (_("syntax error after <exp"));
}
else
{
bytes = 2;
}
else
- {
- as_bad (_("syntax error after <exp"));
- }
+ as_bad (_("syntax error after <exp"));
}
else
{
}
}
else if (ptr[0] == 'a')
- {
- amode = ADDR_ACC;
- }
+ amode = ADDR_ACC;
else if (ptr[0] == '(')
{
/* Look for (exp),y
ptr++;
}
else
- {
- override_len = 0;
- }
+ override_len = 0;
+
ptr = parse_exp (ptr);
if (ptr[0] == ',')
bytes = 2;
}
ptr++;
-
}
}
}
else if (ptr[0] == '[')
{
ptr = parse_exp (ptr + 1);
+
if (ptr[0] == ']')
{
ptr++;
provided. */
static const struct opinfo *
-get_specific (opcode)
- const struct opinfo *opcode;
+get_specific (const struct opinfo *opcode)
{
int ocode = opcode->code;
for (; opcode->code == ocode; opcode++)
- {
- if (opcode->amode == amode)
- return opcode;
- }
+ if (opcode->amode == amode)
+ return opcode;
+
return 0;
}
/* Now we know what sort of opcodes it is, let's build the bytes. */
static void
-build_Mytes (opcode)
- const struct opinfo *opcode;
+build_Mytes (const struct opinfo *opcode)
{
int size;
int type;
char *output;
if (opcode->amode == ADDR_IMPLIED)
- {
- output = frag_more (1);
- }
+ output = frag_more (1);
+
else if (opcode->amode == ADDR_PC_REL)
{
int type;
the frags/bytes it assembles to. */
void
-md_assemble (str)
- char *str;
+md_assemble (char *str)
{
const struct opinfo *opcode;
char name[20];
while (*str == ' ')
str++;
- /* all opcodes are three letters */
+ /* All opcodes are three letters. */
name[0] = str[0];
name[1] = str[1];
name[2] = str[2];
}
symbolS *
-md_undefined_symbol (name)
- char *name ATTRIBUTE_UNUSED;
+md_undefined_symbol (char *name ATTRIBUTE_UNUSED)
{
return 0;
}
returned, or NULL on OK. */
char *
-md_atof (type, litP, sizeP)
- char type;
- char *litP;
- int *sizeP;
+md_atof (int type, char *litP, int *sizeP)
{
int prec;
LITTLENUM_TYPE words[MAX_LITTLENUMS];
}
int
-md_parse_option (c, a)
- int c ATTRIBUTE_UNUSED;
- char *a ATTRIBUTE_UNUSED;
+md_parse_option (int c ATTRIBUTE_UNUSED, char *a ATTRIBUTE_UNUSED)
{
return 0;
}
are. */
void
-md_convert_frag (headers, seg, fragP)
- object_headers *headers ATTRIBUTE_UNUSED;
- segT seg ATTRIBUTE_UNUSED;
- fragS *fragP;
+md_convert_frag (object_headers *headers ATTRIBUTE_UNUSED,
+ segT seg ATTRIBUTE_UNUSED,
+ fragS *fragP)
{
int disp_size = 0;
int inst_size = 0;
case OP_BPL:
case OP_BVS:
case OP_BVC:
- /* Invert the sense of the test */
+ /* Invert the sense of the test. */
buffer[0] ^= 0x20;
- buffer[1] = 3; /* Jump over following brl */
+ buffer[1] = 3; /* Jump over following brl. */
buffer[2] = OP_BRL;
buffer[3] = 0;
buffer[4] = 0;
break;
/* Got to create a branch over a reloc here. */
case C (COND_BRANCH, UNDEF_WORD_DISP):
- buffer[0] ^= 0x20; /* invert test */
+ buffer[0] ^= 0x20; /* Invert test. */
buffer[1] = 3;
buffer[2] = OP_BRL;
buffer[3] = 0;
fragP->fr_offset);
int disp = targ_addr - next_inst;
- md_number_to_chars (buffer + inst_size, disp, disp_size);
+ md_number_to_chars ((char *) buffer + inst_size, disp, disp_size);
fragP->fr_fix += disp_size + inst_size;
fragP->fr_var = 0;
}
}
valueT
-md_section_align (seg, size)
- segT seg;
- valueT size;
+md_section_align (segT seg, valueT size)
{
return ((size + (1 << section_alignment[(int) seg]) - 1)
& (-1 << section_alignment[(int) seg]));
}
void
-md_apply_fix3 (fixP, valP, seg)
- fixS *fixP;
- valueT * valP;
- segT seg ATTRIBUTE_UNUSED;
+md_apply_fix3 (fixS *fixP, valueT * valP, segT seg ATTRIBUTE_UNUSED)
{
long val = * (long *) valP;
char *buf = fixP->fx_where + fixP->fx_frag->fr_literal;
/* Put number into target byte order. */
void
-md_number_to_chars (ptr, use, nbytes)
- char *ptr;
- valueT use;
- int nbytes;
+md_number_to_chars (char *ptr, valueT use, int nbytes)
{
number_to_chars_littleendian (ptr, use, nbytes);
}
long
-md_pcrel_from (fixP)
- fixS *fixP;
+md_pcrel_from (fixS *fixP)
{
int gap = fixP->fx_size + fixP->fx_where + fixP->fx_frag->fr_address - 1;
return gap;
}
void
-tc_coff_symbol_emit_hook (x)
- symbolS *x ATTRIBUTE_UNUSED;
+tc_coff_symbol_emit_hook (symbolS *x ATTRIBUTE_UNUSED)
{
}
short
-tc_coff_fix2rtype (fix_ptr)
- fixS *fix_ptr;
+tc_coff_fix2rtype (fixS *fix_ptr)
{
return fix_ptr->fx_r_type;
}
void
-tc_reloc_mangle (fix_ptr, intr, base)
- fixS *fix_ptr;
- struct internal_reloc *intr;
- bfd_vma base;
+tc_reloc_mangle (fixS *fix_ptr,
+ struct internal_reloc *intr,
+ bfd_vma base)
{
symbolS *symbol_ptr;
to output it */
if (fix_ptr->fx_r_type == RELOC_32)
{
- /* cons likes to create reloc32's whatever the size of the reloc..
- */
+ /* Cons likes to create reloc32's whatever the size of the reloc. */
switch (fix_ptr->fx_size)
{
case 2:
intr->r_symndx = dot->sy_number;
}
else
- {
- intr->r_symndx = symbol_ptr->sy_number;
- }
+ intr->r_symndx = symbol_ptr->sy_number;
}
else
- {
- intr->r_symndx = -1;
- }
+ intr->r_symndx = -1;
}
int
-tc_coff_sizemachdep (frag)
- fragS *frag;
+tc_coff_sizemachdep (fragS *frag)
{
return md_relax_table[frag->fr_subtype].rlx_length;
}
fragment must grow to reach it's destination. */
int
-md_estimate_size_before_relax (fragP, segment_type)
- register fragS *fragP;
- register segT segment_type;
+md_estimate_size_before_relax (fragS *fragP, segT segment_type)
{
int what;
what = GET_WHAT (fragP->fr_subtype);
/* Used to be a branch to somewhere which was unknown. */
if (S_GET_SEGMENT (fragP->fr_symbol) == segment_type)
- {
- /* Got a symbol and it's defined in this segment, become byte
- sized - maybe it will fix up. */
- fragP->fr_subtype = C (what, BYTE_DISP);
- }
+ /* Got a symbol and it's defined in this segment, become byte
+ sized - maybe it will fix up. */
+ fragP->fr_subtype = C (what, BYTE_DISP);
else
- {
- /* Its got a segment, but its not ours, so it will always be
- long. */
- fragP->fr_subtype = C (what, UNDEF_WORD_DISP);
- }
+ /* Its got a segment, but its not ours, so it will always be
+ long. */
+ fragP->fr_subtype = C (what, UNDEF_WORD_DISP);
break;
case C (COND_BRANCH, BYTE_DISP):
}
const char *md_shortopts = "";
-struct option md_longopts[] = {
+struct option md_longopts[] =
+{
#define OPTION_RELAX (OPTION_MD_BASE)
{NULL, no_argument, NULL, 0}
};
void
-md_show_usage (stream)
- FILE *stream ATTRIBUTE_UNUSED;
+md_show_usage (FILE *stream ATTRIBUTE_UNUSED)
{
}
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