mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-27 03:51:15 +08:00
319 lines
8.3 KiB
C
319 lines
8.3 KiB
C
/* IQ2000 opcode support. -*- C -*-
|
||
|
||
Copyright 2000, 2001, 2002, 2005 Free Software Foundation, Inc.
|
||
|
||
Contributed by Red Hat Inc; developed under contract from Fujitsu.
|
||
|
||
This file is part of the GNU Binutils.
|
||
|
||
This program 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 of the License, or
|
||
(at your option) any later version.
|
||
|
||
This program 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 this program; if not, write to the Free Software
|
||
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
|
||
MA 02110-1301, USA. */
|
||
|
||
/* This file is an addendum to iq2000.cpu. Heavy use of C code isn't
|
||
appropriate in .cpu files, so it resides here. This especially applies
|
||
to assembly/disassembly where parsing/printing can be quite involved.
|
||
Such things aren't really part of the specification of the cpu, per se,
|
||
so .cpu files provide the general framework and .opc files handle the
|
||
nitty-gritty details as necessary.
|
||
|
||
Each section is delimited with start and end markers.
|
||
|
||
<arch>-opc.h additions use: "-- opc.h"
|
||
<arch>-opc.c additions use: "-- opc.c"
|
||
<arch>-asm.c additions use: "-- asm.c"
|
||
<arch>-dis.c additions use: "-- dis.c"
|
||
<arch>-ibd.h additions use: "-- ibd.h". */
|
||
|
||
/* -- opc.h */
|
||
|
||
/* Allows reason codes to be output when assembler errors occur. */
|
||
#define CGEN_VERBOSE_ASSEMBLER_ERRORS
|
||
|
||
/* Override disassembly hashing - there are variable bits in the top
|
||
byte of these instructions. */
|
||
#define CGEN_DIS_HASH_SIZE 8
|
||
#define CGEN_DIS_HASH(buf,value) (((* (unsigned char*) (buf)) >> 6) % CGEN_DIS_HASH_SIZE)
|
||
|
||
/* following activates check beyond hashing since some iq2000 and iq10
|
||
instructions have same mnemonics but different functionality. */
|
||
#define CGEN_VALIDATE_INSN_SUPPORTED
|
||
|
||
extern int iq2000_cgen_insn_supported (CGEN_CPU_DESC, const CGEN_INSN *);
|
||
|
||
/* -- asm.c */
|
||
|
||
#include "safe-ctype.h"
|
||
|
||
static const char * MISSING_CLOSING_PARENTHESIS = N_("missing `)'");
|
||
|
||
/* Special check to ensure that instruction exists for given machine. */
|
||
|
||
int
|
||
iq2000_cgen_insn_supported (CGEN_CPU_DESC cd, const CGEN_INSN *insn)
|
||
{
|
||
int machs = cd->machs;
|
||
|
||
return (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_MACH) & machs) != 0;
|
||
}
|
||
|
||
static int
|
||
iq2000_cgen_isa_register (const char **strp)
|
||
{
|
||
int len;
|
||
int ch1, ch2;
|
||
|
||
if (**strp == 'r' || **strp == 'R')
|
||
{
|
||
len = strlen (*strp);
|
||
if (len == 2)
|
||
{
|
||
ch1 = (*strp)[1];
|
||
if ('0' <= ch1 && ch1 <= '9')
|
||
return 1;
|
||
}
|
||
else if (len == 3)
|
||
{
|
||
ch1 = (*strp)[1];
|
||
ch2 = (*strp)[2];
|
||
if (('1' <= ch1 && ch1 <= '2') && ('0' <= ch2 && ch2 <= '9'))
|
||
return 1;
|
||
if ('3' == ch1 && (ch2 == '0' || ch2 == '1'))
|
||
return 1;
|
||
}
|
||
}
|
||
if (**strp == '%'
|
||
&& TOLOWER ((*strp)[1]) != 'l'
|
||
&& TOLOWER ((*strp)[1]) != 'h')
|
||
return 1;
|
||
return 0;
|
||
}
|
||
|
||
/* Handle negated literal. */
|
||
|
||
static const char *
|
||
parse_mimm (CGEN_CPU_DESC cd,
|
||
const char **strp,
|
||
int opindex,
|
||
unsigned long *valuep)
|
||
{
|
||
const char *errmsg;
|
||
|
||
/* Verify this isn't a register. */
|
||
if (iq2000_cgen_isa_register (strp))
|
||
errmsg = _("immediate value cannot be register");
|
||
else
|
||
{
|
||
long value;
|
||
|
||
errmsg = cgen_parse_signed_integer (cd, strp, opindex, & value);
|
||
if (errmsg == NULL)
|
||
{
|
||
long x = (-value) & 0xFFFF0000;
|
||
|
||
if (x != 0 && x != (long) 0xFFFF0000)
|
||
errmsg = _("immediate value out of range");
|
||
else
|
||
*valuep = (-value & 0xFFFF);
|
||
}
|
||
}
|
||
return errmsg;
|
||
}
|
||
|
||
/* Handle signed/unsigned literal. */
|
||
|
||
static const char *
|
||
parse_imm (CGEN_CPU_DESC cd,
|
||
const char **strp,
|
||
int opindex,
|
||
unsigned long *valuep)
|
||
{
|
||
const char *errmsg;
|
||
|
||
if (iq2000_cgen_isa_register (strp))
|
||
errmsg = _("immediate value cannot be register");
|
||
else
|
||
{
|
||
long value;
|
||
|
||
errmsg = cgen_parse_signed_integer (cd, strp, opindex, & value);
|
||
if (errmsg == NULL)
|
||
{
|
||
long x = value & 0xFFFF0000;
|
||
|
||
if (x != 0 && x != (long) 0xFFFF0000)
|
||
errmsg = _("immediate value out of range");
|
||
else
|
||
*valuep = (value & 0xFFFF);
|
||
}
|
||
}
|
||
return errmsg;
|
||
}
|
||
|
||
/* Handle iq10 21-bit jmp offset. */
|
||
|
||
static const char *
|
||
parse_jtargq10 (CGEN_CPU_DESC cd,
|
||
const char **strp,
|
||
int opindex,
|
||
int reloc ATTRIBUTE_UNUSED,
|
||
enum cgen_parse_operand_result *type_addr ATTRIBUTE_UNUSED,
|
||
bfd_vma *valuep)
|
||
{
|
||
const char *errmsg;
|
||
bfd_vma value;
|
||
enum cgen_parse_operand_result result_type = CGEN_PARSE_OPERAND_RESULT_NUMBER;
|
||
|
||
errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_IQ2000_OFFSET_21,
|
||
& result_type, & value);
|
||
if (errmsg == NULL && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
|
||
{
|
||
/* Check value is within 23-bits
|
||
(remembering that 2-bit shift right will occur). */
|
||
if (value > 0x7fffff)
|
||
return _("21-bit offset out of range");
|
||
}
|
||
*valuep = (value & 0x7FFFFF);
|
||
return errmsg;
|
||
}
|
||
|
||
/* Handle high(). */
|
||
|
||
static const char *
|
||
parse_hi16 (CGEN_CPU_DESC cd,
|
||
const char **strp,
|
||
int opindex,
|
||
unsigned long *valuep)
|
||
{
|
||
if (strncasecmp (*strp, "%hi(", 4) == 0)
|
||
{
|
||
enum cgen_parse_operand_result result_type;
|
||
bfd_vma value;
|
||
const char *errmsg;
|
||
|
||
*strp += 4;
|
||
errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_HI16,
|
||
& result_type, & value);
|
||
if (**strp != ')')
|
||
return MISSING_CLOSING_PARENTHESIS;
|
||
|
||
++*strp;
|
||
if (errmsg == NULL
|
||
&& result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
|
||
{
|
||
/* If value has top-bit of %lo on, then it will
|
||
sign-propagate and so we compensate by adding
|
||
1 to the resultant %hi value. */
|
||
if (value & 0x8000)
|
||
value += 0x10000;
|
||
value >>= 16;
|
||
}
|
||
*valuep = value;
|
||
|
||
return errmsg;
|
||
}
|
||
|
||
/* We add %uhi in case a user just wants the high 16-bits or is using
|
||
an insn like ori for %lo which does not sign-propagate. */
|
||
if (strncasecmp (*strp, "%uhi(", 5) == 0)
|
||
{
|
||
enum cgen_parse_operand_result result_type;
|
||
bfd_vma value;
|
||
const char *errmsg;
|
||
|
||
*strp += 5;
|
||
errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_IQ2000_UHI16,
|
||
& result_type, & value);
|
||
if (**strp != ')')
|
||
return MISSING_CLOSING_PARENTHESIS;
|
||
|
||
++*strp;
|
||
if (errmsg == NULL
|
||
&& result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
|
||
value >>= 16;
|
||
|
||
*valuep = value;
|
||
|
||
return errmsg;
|
||
}
|
||
|
||
return parse_imm (cd, strp, opindex, valuep);
|
||
}
|
||
|
||
/* Handle %lo in a signed context.
|
||
The signedness of the value doesn't matter to %lo(), but this also
|
||
handles the case where %lo() isn't present. */
|
||
|
||
static const char *
|
||
parse_lo16 (CGEN_CPU_DESC cd,
|
||
const char **strp,
|
||
int opindex,
|
||
unsigned long *valuep)
|
||
{
|
||
if (strncasecmp (*strp, "%lo(", 4) == 0)
|
||
{
|
||
const char *errmsg;
|
||
enum cgen_parse_operand_result result_type;
|
||
bfd_vma value;
|
||
|
||
*strp += 4;
|
||
errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_LO16,
|
||
& result_type, & value);
|
||
if (**strp != ')')
|
||
return MISSING_CLOSING_PARENTHESIS;
|
||
++*strp;
|
||
if (errmsg == NULL
|
||
&& result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
|
||
value &= 0xffff;
|
||
*valuep = value;
|
||
return errmsg;
|
||
}
|
||
|
||
return parse_imm (cd, strp, opindex, valuep);
|
||
}
|
||
|
||
/* Handle %lo in a negated signed context.
|
||
The signedness of the value doesn't matter to %lo(), but this also
|
||
handles the case where %lo() isn't present. */
|
||
|
||
static const char *
|
||
parse_mlo16 (CGEN_CPU_DESC cd,
|
||
const char **strp,
|
||
int opindex,
|
||
unsigned long *valuep)
|
||
{
|
||
if (strncasecmp (*strp, "%lo(", 4) == 0)
|
||
{
|
||
const char *errmsg;
|
||
enum cgen_parse_operand_result result_type;
|
||
bfd_vma value;
|
||
|
||
*strp += 4;
|
||
errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_LO16,
|
||
& result_type, & value);
|
||
if (**strp != ')')
|
||
return MISSING_CLOSING_PARENTHESIS;
|
||
++*strp;
|
||
if (errmsg == NULL
|
||
&& result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
|
||
value = (-value) & 0xffff;
|
||
*valuep = value;
|
||
return errmsg;
|
||
}
|
||
|
||
return parse_mimm (cd, strp, opindex, valuep);
|
||
}
|
||
|
||
/* -- */
|