mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-22 16:53:31 +08:00
b3625fe62c
and rightstart to not be const. (parse_mri_control_expression): Likewise. (build_mri_control_operand): Likewise. If the left side of the comparison is a register, and the right side is not, swap the two sides. * config/m68k-parse.y (m68k_reg_parse): Make globally visible. * config/m68k-parse.h (m68k_reg_parse): Declare.
964 lines
18 KiB
Plaintext
964 lines
18 KiB
Plaintext
/* m68k.y -- bison grammar for m68k operand parsing
|
|
Copyright (C) 1995 Free Software Foundation, Inc.
|
|
Written by Ken Raeburn and Ian Lance Taylor, Cygnus Support
|
|
|
|
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 2, 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, 59 Temple Place - Suite 330, Boston, MA
|
|
02111-1307, USA. */
|
|
|
|
/* This file holds a bison grammar to parse m68k operands. The m68k
|
|
has a complicated operand syntax, and gas supports two main
|
|
variations of it. Using a grammar is probably overkill, but at
|
|
least it makes clear exactly what we do support. */
|
|
|
|
%{
|
|
|
|
#include "as.h"
|
|
#include "tc-m68k.h"
|
|
#include "m68k-parse.h"
|
|
|
|
/* Remap normal yacc parser interface names (yyparse, yylex, yyerror,
|
|
etc), as well as gratuitiously global symbol names If other parser
|
|
generators (bison, byacc, etc) produce additional global names that
|
|
conflict at link time, then those parser generators need to be
|
|
fixed instead of adding those names to this list. */
|
|
|
|
#define yymaxdepth m68k_maxdepth
|
|
#define yyparse m68k_parse
|
|
#define yylex m68k_lex
|
|
#define yyerror m68k_error
|
|
#define yylval m68k_lval
|
|
#define yychar m68k_char
|
|
#define yydebug m68k_debug
|
|
#define yypact m68k_pact
|
|
#define yyr1 m68k_r1
|
|
#define yyr2 m68k_r2
|
|
#define yydef m68k_def
|
|
#define yychk m68k_chk
|
|
#define yypgo m68k_pgo
|
|
#define yyact m68k_act
|
|
#define yyexca m68k_exca
|
|
#define yyerrflag m68k_errflag
|
|
#define yynerrs m68k_nerrs
|
|
#define yyps m68k_ps
|
|
#define yypv m68k_pv
|
|
#define yys m68k_s
|
|
#define yy_yys m68k_yys
|
|
#define yystate m68k_state
|
|
#define yytmp m68k_tmp
|
|
#define yyv m68k_v
|
|
#define yy_yyv m68k_yyv
|
|
#define yyval m68k_val
|
|
#define yylloc m68k_lloc
|
|
#define yyreds m68k_reds /* With YYDEBUG defined */
|
|
#define yytoks m68k_toks /* With YYDEBUG defined */
|
|
#define yylhs m68k_yylhs
|
|
#define yylen m68k_yylen
|
|
#define yydefred m68k_yydefred
|
|
#define yydgoto m68k_yydgoto
|
|
#define yysindex m68k_yysindex
|
|
#define yyrindex m68k_yyrindex
|
|
#define yygindex m68k_yygindex
|
|
#define yytable m68k_yytable
|
|
#define yycheck m68k_yycheck
|
|
|
|
#ifndef YYDEBUG
|
|
#define YYDEBUG 1
|
|
#endif
|
|
|
|
/* Internal functions. */
|
|
|
|
static int yylex PARAMS (());
|
|
static void yyerror PARAMS ((const char *));
|
|
|
|
/* The parser sets fields pointed to by this global variable. */
|
|
static struct m68k_op *op;
|
|
|
|
%}
|
|
|
|
%union
|
|
{
|
|
struct m68k_indexreg indexreg;
|
|
enum m68k_register reg;
|
|
struct m68k_exp exp;
|
|
unsigned long mask;
|
|
int onereg;
|
|
}
|
|
|
|
%token <reg> DR AR FPR FPCR LPC ZAR ZDR LZPC CREG
|
|
%token <indexreg> INDEXREG
|
|
%token <exp> EXPR
|
|
|
|
%type <indexreg> zireg zdireg
|
|
%type <reg> zadr zdr apc zapc zpc optzapc optczapc
|
|
%type <exp> optcexpr optexprc
|
|
%type <mask> reglist ireglist reglistpair
|
|
%type <onereg> reglistreg
|
|
|
|
%%
|
|
|
|
/* An operand. */
|
|
|
|
operand:
|
|
generic_operand
|
|
| motorola_operand
|
|
| mit_operand
|
|
;
|
|
|
|
/* A generic operand. */
|
|
|
|
generic_operand:
|
|
DR
|
|
{
|
|
op->mode = DREG;
|
|
op->reg = $1;
|
|
}
|
|
| AR
|
|
{
|
|
op->mode = AREG;
|
|
op->reg = $1;
|
|
}
|
|
| FPR
|
|
{
|
|
op->mode = FPREG;
|
|
op->reg = $1;
|
|
}
|
|
| FPCR
|
|
{
|
|
op->mode = CONTROL;
|
|
op->reg = $1;
|
|
}
|
|
| CREG
|
|
{
|
|
op->mode = CONTROL;
|
|
op->reg = $1;
|
|
}
|
|
| EXPR
|
|
{
|
|
op->mode = ABSL;
|
|
op->disp = $1;
|
|
}
|
|
| '#' EXPR
|
|
{
|
|
op->mode = IMMED;
|
|
op->disp = $2;
|
|
}
|
|
| '&' EXPR
|
|
{
|
|
op->mode = IMMED;
|
|
op->disp = $2;
|
|
}
|
|
| reglist
|
|
{
|
|
op->mode = REGLST;
|
|
op->mask = $1;
|
|
}
|
|
;
|
|
|
|
/* An operand in Motorola syntax. This includes MRI syntax as well,
|
|
which may or may not be different in that it permits commutativity
|
|
of index and base registers, and permits an offset expression to
|
|
appear inside or outside of the parentheses. */
|
|
|
|
motorola_operand:
|
|
'(' AR ')'
|
|
{
|
|
op->mode = AINDR;
|
|
op->reg = $2;
|
|
}
|
|
| '(' AR ')' '+'
|
|
{
|
|
op->mode = AINC;
|
|
op->reg = $2;
|
|
}
|
|
| '-' '(' AR ')'
|
|
{
|
|
op->mode = ADEC;
|
|
op->reg = $3;
|
|
}
|
|
| '(' EXPR ',' zapc ')'
|
|
{
|
|
op->reg = $4;
|
|
op->disp = $2;
|
|
if (($4 >= ZADDR0 && $4 <= ZADDR7)
|
|
|| $4 == ZPC)
|
|
op->mode = BASE;
|
|
else
|
|
op->mode = DISP;
|
|
}
|
|
| EXPR '(' zapc ')'
|
|
{
|
|
op->reg = $3;
|
|
op->disp = $1;
|
|
if (($3 >= ZADDR0 && $3 <= ZADDR7)
|
|
|| $3 == ZPC)
|
|
op->mode = BASE;
|
|
else
|
|
op->mode = DISP;
|
|
}
|
|
| '(' LPC ')'
|
|
{
|
|
op->mode = DISP;
|
|
op->reg = $2;
|
|
}
|
|
| '(' ZAR ')'
|
|
{
|
|
op->mode = BASE;
|
|
op->reg = $2;
|
|
}
|
|
| '(' LZPC ')'
|
|
{
|
|
op->mode = BASE;
|
|
op->reg = $2;
|
|
}
|
|
| '(' EXPR ',' zapc ',' zireg ')'
|
|
{
|
|
op->mode = BASE;
|
|
op->reg = $4;
|
|
op->disp = $2;
|
|
op->index = $6;
|
|
}
|
|
| '(' EXPR ',' zapc ',' zpc ')'
|
|
{
|
|
if ($4 == PC || $4 == ZPC)
|
|
yyerror ("syntax error");
|
|
op->mode = BASE;
|
|
op->reg = $6;
|
|
op->disp = $2;
|
|
op->index.reg = $4;
|
|
op->index.size = SIZE_UNSPEC;
|
|
op->index.scale = 1;
|
|
}
|
|
| '(' EXPR ',' zdireg optczapc ')'
|
|
{
|
|
op->mode = BASE;
|
|
op->reg = $5;
|
|
op->disp = $2;
|
|
op->index = $4;
|
|
}
|
|
| EXPR '(' zapc ',' zireg ')'
|
|
{
|
|
op->mode = BASE;
|
|
op->reg = $3;
|
|
op->disp = $1;
|
|
op->index = $5;
|
|
}
|
|
| '(' zapc ',' zireg ')'
|
|
{
|
|
op->mode = BASE;
|
|
op->reg = $2;
|
|
op->index = $4;
|
|
}
|
|
| EXPR '(' zapc ',' zpc ')'
|
|
{
|
|
if ($3 == PC || $3 == ZPC)
|
|
yyerror ("syntax error");
|
|
op->mode = BASE;
|
|
op->reg = $5;
|
|
op->disp = $1;
|
|
op->index.reg = $3;
|
|
op->index.size = SIZE_UNSPEC;
|
|
op->index.scale = 1;
|
|
}
|
|
| '(' zapc ',' zpc ')'
|
|
{
|
|
if ($2 == PC || $2 == ZPC)
|
|
yyerror ("syntax error");
|
|
op->mode = BASE;
|
|
op->reg = $4;
|
|
op->index.reg = $2;
|
|
op->index.size = SIZE_UNSPEC;
|
|
op->index.scale = 1;
|
|
}
|
|
| EXPR '(' zdireg optczapc ')'
|
|
{
|
|
op->mode = BASE;
|
|
op->reg = $4;
|
|
op->disp = $1;
|
|
op->index = $3;
|
|
}
|
|
| '(' zdireg optczapc ')'
|
|
{
|
|
op->mode = BASE;
|
|
op->reg = $3;
|
|
op->index = $2;
|
|
}
|
|
| '(' '[' EXPR optczapc ']' ',' zireg optcexpr ')'
|
|
{
|
|
op->mode = POST;
|
|
op->reg = $4;
|
|
op->disp = $3;
|
|
op->index = $7;
|
|
op->odisp = $8;
|
|
}
|
|
| '(' '[' EXPR optczapc ']' optcexpr ')'
|
|
{
|
|
op->mode = POST;
|
|
op->reg = $4;
|
|
op->disp = $3;
|
|
op->odisp = $6;
|
|
}
|
|
| '(' '[' zapc ']' ',' zireg optcexpr ')'
|
|
{
|
|
op->mode = POST;
|
|
op->reg = $3;
|
|
op->index = $6;
|
|
op->odisp = $7;
|
|
}
|
|
| '(' '[' zapc ']' optcexpr ')'
|
|
{
|
|
op->mode = POST;
|
|
op->reg = $3;
|
|
op->odisp = $5;
|
|
}
|
|
| '(' '[' EXPR ',' zapc ',' zireg ']' optcexpr ')'
|
|
{
|
|
op->mode = PRE;
|
|
op->reg = $5;
|
|
op->disp = $3;
|
|
op->index = $7;
|
|
op->odisp = $9;
|
|
}
|
|
| '(' '[' zapc ',' zireg ']' optcexpr ')'
|
|
{
|
|
op->mode = PRE;
|
|
op->reg = $3;
|
|
op->index = $5;
|
|
op->odisp = $7;
|
|
}
|
|
| '(' '[' EXPR ',' zapc ',' zpc ']' optcexpr ')'
|
|
{
|
|
if ($5 == PC || $5 == ZPC)
|
|
yyerror ("syntax error");
|
|
op->mode = PRE;
|
|
op->reg = $7;
|
|
op->disp = $3;
|
|
op->index.reg = $5;
|
|
op->index.size = SIZE_UNSPEC;
|
|
op->index.scale = 1;
|
|
op->odisp = $9;
|
|
}
|
|
| '(' '[' zapc ',' zpc ']' optcexpr ')'
|
|
{
|
|
if ($3 == PC || $3 == ZPC)
|
|
yyerror ("syntax error");
|
|
op->mode = PRE;
|
|
op->reg = $5;
|
|
op->index.reg = $3;
|
|
op->index.size = SIZE_UNSPEC;
|
|
op->index.scale = 1;
|
|
op->odisp = $7;
|
|
}
|
|
| '(' '[' optexprc zdireg optczapc ']' optcexpr ')'
|
|
{
|
|
op->mode = PRE;
|
|
op->reg = $5;
|
|
op->disp = $3;
|
|
op->index = $4;
|
|
op->odisp = $7;
|
|
}
|
|
;
|
|
|
|
/* An operand in MIT syntax. */
|
|
|
|
mit_operand:
|
|
optzapc '@'
|
|
{
|
|
/* We use optzapc to avoid a shift/reduce conflict. */
|
|
if ($1 < ADDR0 || $1 > ADDR7)
|
|
yyerror ("syntax error");
|
|
op->mode = AINDR;
|
|
op->reg = $1;
|
|
}
|
|
| optzapc '@' '+'
|
|
{
|
|
/* We use optzapc to avoid a shift/reduce conflict. */
|
|
if ($1 < ADDR0 || $1 > ADDR7)
|
|
yyerror ("syntax error");
|
|
op->mode = AINC;
|
|
op->reg = $1;
|
|
}
|
|
| optzapc '@' '-'
|
|
{
|
|
/* We use optzapc to avoid a shift/reduce conflict. */
|
|
if ($1 < ADDR0 || $1 > ADDR7)
|
|
yyerror ("syntax error");
|
|
op->mode = ADEC;
|
|
op->reg = $1;
|
|
}
|
|
| optzapc '@' '(' EXPR ')'
|
|
{
|
|
op->reg = $1;
|
|
op->disp = $4;
|
|
if (($1 >= ZADDR0 && $1 <= ZADDR7)
|
|
|| $1 == ZPC)
|
|
op->mode = BASE;
|
|
else
|
|
op->mode = DISP;
|
|
}
|
|
| optzapc '@' '(' optexprc zireg ')'
|
|
{
|
|
op->mode = BASE;
|
|
op->reg = $1;
|
|
op->disp = $4;
|
|
op->index = $5;
|
|
}
|
|
| optzapc '@' '(' EXPR ')' '@' '(' optexprc zireg ')'
|
|
{
|
|
op->mode = POST;
|
|
op->reg = $1;
|
|
op->disp = $4;
|
|
op->index = $9;
|
|
op->odisp = $8;
|
|
}
|
|
| optzapc '@' '(' EXPR ')' '@' '(' EXPR ')'
|
|
{
|
|
op->mode = POST;
|
|
op->reg = $1;
|
|
op->disp = $4;
|
|
op->odisp = $8;
|
|
}
|
|
| optzapc '@' '(' optexprc zireg ')' '@' '(' EXPR ')'
|
|
{
|
|
op->mode = PRE;
|
|
op->reg = $1;
|
|
op->disp = $4;
|
|
op->index = $5;
|
|
op->odisp = $9;
|
|
}
|
|
;
|
|
|
|
/* An index register, possibly suppressed, which need not have a size
|
|
or scale. */
|
|
|
|
zireg:
|
|
INDEXREG
|
|
| zadr
|
|
{
|
|
$$.reg = $1;
|
|
$$.size = SIZE_UNSPEC;
|
|
$$.scale = 1;
|
|
}
|
|
;
|
|
|
|
/* A register which may be an index register, but which may not be an
|
|
address register. This nonterminal is used to avoid ambiguity when
|
|
trying to parse something like (0,d5,a6) as compared to (0,a6,d5). */
|
|
|
|
zdireg:
|
|
INDEXREG
|
|
| zdr
|
|
{
|
|
$$.reg = $1;
|
|
$$.size = SIZE_UNSPEC;
|
|
$$.scale = 1;
|
|
}
|
|
;
|
|
|
|
/* An address or data register, or a suppressed address or data
|
|
register. */
|
|
|
|
zadr:
|
|
zdr
|
|
| AR
|
|
| ZAR
|
|
;
|
|
|
|
/* A data register which may be suppressed. */
|
|
|
|
zdr:
|
|
DR
|
|
| ZDR
|
|
;
|
|
|
|
/* Either an address register or the PC. */
|
|
|
|
apc:
|
|
AR
|
|
| LPC
|
|
;
|
|
|
|
/* Either an address register, or the PC, or a suppressed address
|
|
register, or a suppressed PC. */
|
|
|
|
zapc:
|
|
apc
|
|
| LZPC
|
|
| ZAR
|
|
;
|
|
|
|
/* An optional zapc. */
|
|
|
|
optzapc:
|
|
/* empty */
|
|
{
|
|
$$ = ZADDR0;
|
|
}
|
|
| zapc
|
|
;
|
|
|
|
/* The PC, optionally suppressed. */
|
|
|
|
zpc:
|
|
LPC
|
|
| LZPC
|
|
;
|
|
|
|
/* ',' zapc when it may be omitted. */
|
|
|
|
optczapc:
|
|
/* empty */
|
|
{
|
|
$$ = ZADDR0;
|
|
}
|
|
| ',' zapc
|
|
{
|
|
$$ = $2;
|
|
}
|
|
;
|
|
|
|
/* ',' EXPR when it may be omitted. */
|
|
|
|
optcexpr:
|
|
/* empty */
|
|
{
|
|
$$.exp.X_op = O_absent;
|
|
$$.size = SIZE_UNSPEC;
|
|
}
|
|
| ',' EXPR
|
|
{
|
|
$$ = $2;
|
|
}
|
|
;
|
|
|
|
/* EXPR ',' when it may be omitted. */
|
|
|
|
optexprc:
|
|
/* empty */
|
|
{
|
|
$$.exp.X_op = O_absent;
|
|
$$.size = SIZE_UNSPEC;
|
|
}
|
|
| EXPR ','
|
|
{
|
|
$$ = $1;
|
|
}
|
|
;
|
|
|
|
/* A register list for the movem instruction. */
|
|
|
|
reglist:
|
|
reglistpair
|
|
| reglistpair '/' ireglist
|
|
{
|
|
$$ = $1 | $3;
|
|
}
|
|
| reglistreg '/' ireglist
|
|
{
|
|
$$ = (1 << $1) | $3;
|
|
}
|
|
;
|
|
|
|
/* We use ireglist when we know we are looking at a reglist, and we
|
|
can safely reduce a simple register to reglistreg. If we permitted
|
|
reglist to reduce to reglistreg, it would be ambiguous whether a
|
|
plain register were a DREG/AREG/FPREG or a REGLST. */
|
|
|
|
ireglist:
|
|
reglistreg
|
|
{
|
|
$$ = 1 << $1;
|
|
}
|
|
| reglistpair
|
|
| reglistpair '/' ireglist
|
|
{
|
|
$$ = $1 | $3;
|
|
}
|
|
| reglistreg '/' ireglist
|
|
{
|
|
$$ = (1 << $1) | $3;
|
|
}
|
|
;
|
|
|
|
reglistpair:
|
|
reglistreg '-' reglistreg
|
|
{
|
|
$$ = (1 << ($3 + 1)) - 1 - ((1 << $1) - 1);
|
|
}
|
|
;
|
|
|
|
reglistreg:
|
|
DR
|
|
{
|
|
$$ = $1 - DATA0;
|
|
}
|
|
| AR
|
|
{
|
|
$$ = $1 - ADDR0 + 8;
|
|
}
|
|
| FPR
|
|
{
|
|
$$ = $1 - FP0 + 16;
|
|
}
|
|
| FPCR
|
|
{
|
|
if ($1 == FPI)
|
|
$$ = 24;
|
|
else if ($1 == FPS)
|
|
$$ = 25;
|
|
else
|
|
$$ = 26;
|
|
}
|
|
;
|
|
|
|
%%
|
|
|
|
/* The string to parse is stored here, and modified by yylex. */
|
|
|
|
static char *str;
|
|
|
|
/* The original string pointer. */
|
|
|
|
static char *strorig;
|
|
|
|
/* If *CCP could be a register, return the register number and advance
|
|
*CCP. Otherwise don't change *CCP, and return 0. */
|
|
|
|
enum m68k_register
|
|
m68k_reg_parse (ccp)
|
|
register char **ccp;
|
|
{
|
|
char *start = *ccp;
|
|
char c;
|
|
char *p;
|
|
symbolS *symbolp;
|
|
|
|
if (flag_reg_prefix_optional)
|
|
{
|
|
if (*start == REGISTER_PREFIX)
|
|
start++;
|
|
p = start;
|
|
}
|
|
else
|
|
{
|
|
if (*start != REGISTER_PREFIX)
|
|
return 0;
|
|
p = start + 1;
|
|
}
|
|
|
|
if (! is_name_beginner (*p))
|
|
return 0;
|
|
|
|
p++;
|
|
while (is_part_of_name (*p) && *p != '.' && *p != ':' && *p != '*')
|
|
p++;
|
|
|
|
c = *p;
|
|
*p = 0;
|
|
symbolp = symbol_find (start);
|
|
*p = c;
|
|
|
|
if (symbolp != NULL && S_GET_SEGMENT (symbolp) == reg_section)
|
|
{
|
|
*ccp = p;
|
|
return S_GET_VALUE (symbolp);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* The lexer. */
|
|
|
|
static int
|
|
yylex ()
|
|
{
|
|
enum m68k_register reg;
|
|
char *s;
|
|
int parens;
|
|
int c = 0;
|
|
char *hold;
|
|
|
|
if (*str == ' ')
|
|
++str;
|
|
|
|
if (*str == '\0')
|
|
return 0;
|
|
|
|
/* Various special characters are just returned directly. */
|
|
switch (*str)
|
|
{
|
|
case '#':
|
|
case '&':
|
|
case ',':
|
|
case ')':
|
|
case '/':
|
|
case '@':
|
|
case '[':
|
|
case ']':
|
|
return *str++;
|
|
case '+':
|
|
/* It so happens that a '+' can only appear at the end of an
|
|
operand. If it appears anywhere else, it must be a unary
|
|
plus on an expression. */
|
|
if (str[1] == '\0')
|
|
return *str++;
|
|
break;
|
|
case '-':
|
|
/* A '-' can only appear in -(ar), rn-rn, or ar@-. If it
|
|
appears anywhere else, it must be a unary minus on an
|
|
expression. */
|
|
if (str[1] == '\0')
|
|
return *str++;
|
|
s = str + 1;
|
|
if (*s == '(')
|
|
++s;
|
|
if (m68k_reg_parse (&s) != 0)
|
|
return *str++;
|
|
break;
|
|
case '(':
|
|
/* A '(' can only appear in `(reg)', `(expr,...', `([', `@(', or
|
|
`)('. If it appears anywhere else, it must be starting an
|
|
expression. */
|
|
if (str[1] == '['
|
|
|| (str > strorig
|
|
&& (str[-1] == '@'
|
|
|| str[-1] == ')')))
|
|
return *str++;
|
|
s = str + 1;
|
|
if (m68k_reg_parse (&s) != 0)
|
|
return *str++;
|
|
/* Check for the case of '(expr,...' by scanning ahead. If we
|
|
find a comma outside of balanced parentheses, we return '('.
|
|
If we find an unbalanced right parenthesis, then presumably
|
|
the '(' really starts an expression. */
|
|
parens = 0;
|
|
for (s = str + 1; *s != '\0'; s++)
|
|
{
|
|
if (*s == '(')
|
|
++parens;
|
|
else if (*s == ')')
|
|
{
|
|
if (parens == 0)
|
|
break;
|
|
--parens;
|
|
}
|
|
else if (*s == ',' && parens == 0)
|
|
{
|
|
/* A comma can not normally appear in an expression, so
|
|
this is a case of '(expr,...'. */
|
|
return *str++;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* See if it's a register. */
|
|
|
|
reg = m68k_reg_parse (&str);
|
|
if (reg != 0)
|
|
{
|
|
int ret;
|
|
|
|
yylval.reg = reg;
|
|
|
|
if (reg >= DATA0 && reg <= DATA7)
|
|
ret = DR;
|
|
else if (reg >= ADDR0 && reg <= ADDR7)
|
|
ret = AR;
|
|
else if (reg >= FP0 && reg <= FP7)
|
|
return FPR;
|
|
else if (reg == FPI
|
|
|| reg == FPS
|
|
|| reg == FPC)
|
|
return FPCR;
|
|
else if (reg == PC)
|
|
return LPC;
|
|
else if (reg >= ZDATA0 && reg <= ZDATA7)
|
|
ret = ZDR;
|
|
else if (reg >= ZADDR0 && reg <= ZADDR7)
|
|
ret = ZAR;
|
|
else if (reg == ZPC)
|
|
return LZPC;
|
|
else
|
|
return CREG;
|
|
|
|
/* If we get here, we have a data or address register. We
|
|
must check for a size or scale; if we find one, we must
|
|
return INDEXREG. */
|
|
|
|
s = str;
|
|
|
|
if (*s != '.' && *s != ':' && *s != '*')
|
|
return ret;
|
|
|
|
yylval.indexreg.reg = reg;
|
|
|
|
if (*s != '.' && *s != ':')
|
|
yylval.indexreg.size = SIZE_UNSPEC;
|
|
else
|
|
{
|
|
++s;
|
|
switch (*s)
|
|
{
|
|
case 'w':
|
|
case 'W':
|
|
yylval.indexreg.size = SIZE_WORD;
|
|
++s;
|
|
break;
|
|
case 'l':
|
|
case 'L':
|
|
yylval.indexreg.size = SIZE_LONG;
|
|
++s;
|
|
break;
|
|
default:
|
|
yyerror ("illegal size specification");
|
|
yylval.indexreg.size = SIZE_UNSPEC;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (*s != '*' && *s != ':')
|
|
yylval.indexreg.scale = 1;
|
|
else
|
|
{
|
|
++s;
|
|
switch (*s)
|
|
{
|
|
case '1':
|
|
case '2':
|
|
case '4':
|
|
case '8':
|
|
yylval.indexreg.scale = *s - '0';
|
|
++s;
|
|
break;
|
|
default:
|
|
yyerror ("illegal scale specification");
|
|
yylval.indexreg.scale = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
str = s;
|
|
|
|
return INDEXREG;
|
|
}
|
|
|
|
/* It must be an expression. Before we call expression, we need to
|
|
look ahead to see if there is a size specification. We must do
|
|
that first, because otherwise foo.l will be treated as the symbol
|
|
foo.l, rather than as the symbol foo with a long size
|
|
specification. The grammar requires that all expressions end at
|
|
the end of the operand, or with ',', '(', ']', ')'. */
|
|
|
|
parens = 0;
|
|
for (s = str; *s != '\0'; s++)
|
|
{
|
|
if (*s == '(')
|
|
{
|
|
if (parens == 0
|
|
&& s > str
|
|
&& (s[-1] == ')' || isalnum ((unsigned char) s[-1])))
|
|
break;
|
|
++parens;
|
|
}
|
|
else if (*s == ')')
|
|
{
|
|
if (parens == 0)
|
|
break;
|
|
--parens;
|
|
}
|
|
else if (parens == 0
|
|
&& (*s == ',' || *s == ']'))
|
|
break;
|
|
}
|
|
|
|
yylval.exp.size = SIZE_UNSPEC;
|
|
if (s <= str + 2
|
|
|| (s[-2] != '.' && s[-2] != ':'))
|
|
s = NULL;
|
|
else
|
|
{
|
|
switch (s[-1])
|
|
{
|
|
case 's':
|
|
case 'S':
|
|
case 'b':
|
|
case 'B':
|
|
yylval.exp.size = SIZE_BYTE;
|
|
break;
|
|
case 'w':
|
|
case 'W':
|
|
yylval.exp.size = SIZE_WORD;
|
|
break;
|
|
case 'l':
|
|
case 'L':
|
|
yylval.exp.size = SIZE_LONG;
|
|
break;
|
|
default:
|
|
s = NULL;
|
|
break;
|
|
}
|
|
if (yylval.exp.size != SIZE_UNSPEC)
|
|
{
|
|
c = s[-2];
|
|
s[-2] = '\0';
|
|
}
|
|
}
|
|
|
|
hold = input_line_pointer;
|
|
input_line_pointer = str;
|
|
expression (&yylval.exp.exp);
|
|
str = input_line_pointer;
|
|
input_line_pointer = hold;
|
|
|
|
if (s != NULL)
|
|
{
|
|
s[-2] = c;
|
|
str = s;
|
|
}
|
|
|
|
return EXPR;
|
|
}
|
|
|
|
/* Parse an m68k operand. This is the only function which is called
|
|
from outside this file. */
|
|
|
|
int
|
|
m68k_ip_op (s, oparg)
|
|
char *s;
|
|
struct m68k_op *oparg;
|
|
{
|
|
memset (oparg, 0, sizeof *oparg);
|
|
oparg->error = NULL;
|
|
oparg->index.reg = ZDATA0;
|
|
oparg->index.scale = 1;
|
|
oparg->disp.exp.X_op = O_absent;
|
|
oparg->odisp.exp.X_op = O_absent;
|
|
|
|
str = strorig = s;
|
|
op = oparg;
|
|
|
|
return yyparse ();
|
|
}
|
|
|
|
/* The error handler. */
|
|
|
|
static void
|
|
yyerror (s)
|
|
const char *s;
|
|
{
|
|
op->error = s;
|
|
}
|