/* IP2K opcode support. -*- C -*-
Copyright 2002, 2005, 2011 Free Software Foundation, Inc.
Contributed by Red Hat Inc;
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 3 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. */
/*
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 */
/* Check applicability of instructions against machines. */
#define CGEN_VALIDATE_INSN_SUPPORTED
/* 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)) >> 5) % CGEN_DIS_HASH_SIZE)
#define CGEN_ASM_HASH_SIZE 127
#define CGEN_ASM_HASH(insn) ip2k_asm_hash (insn)
extern unsigned int ip2k_asm_hash (const char *);
extern int ip2k_cgen_insn_supported (CGEN_CPU_DESC, const CGEN_INSN *);
/* -- opc.c */
#include "safe-ctype.h"
/* A better hash function for instruction mnemonics. */
unsigned int
ip2k_asm_hash (const char* insn)
{
unsigned int hash;
const char* m = insn;
for (hash = 0; *m && ! ISSPACE (*m); m++)
hash = (hash * 23) ^ (0x1F & TOLOWER (*m));
/* printf ("%s %d\n", insn, (hash % CGEN_ASM_HASH_SIZE)); */
return hash % CGEN_ASM_HASH_SIZE;
}
/* Special check to ensure that instruction exists for given machine. */
int
ip2k_cgen_insn_supported (CGEN_CPU_DESC cd, const CGEN_INSN *insn)
{
int machs = CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_MACH);
/* No mach attribute? Assume it's supported for all machs. */
if (machs == 0)
return 1;
return (machs & cd->machs) != 0;
}
/* -- asm.c */
static const char *
parse_fr (CGEN_CPU_DESC cd,
const char **strp,
int opindex,
unsigned long *valuep)
{
const char *errmsg;
const char *old_strp;
char *afteroffset;
enum cgen_parse_operand_result result_type;
bfd_vma value;
extern CGEN_KEYWORD ip2k_cgen_opval_register_names;
bfd_vma tempvalue;
old_strp = *strp;
afteroffset = NULL;
/* Check here to see if you're about to try parsing a w as the first arg
and return an error if you are. */
if ((strncmp (*strp, "w", 1) == 0) || (strncmp (*strp, "W", 1) == 0))
{
(*strp)++;
if ((strncmp (*strp, ",", 1) == 0) || ISSPACE (**strp))
{
/* We've been passed a w. Return with an error message so that
cgen will try the next parsing option. */
errmsg = _("W keyword invalid in FR operand slot.");
return errmsg;
}
*strp = old_strp;
}
/* Attempt parse as register keyword. */
errmsg = cgen_parse_keyword (cd, strp, & ip2k_cgen_opval_register_names,
(long *) valuep);
if (*strp != NULL
&& errmsg == NULL)
return errmsg;
/* Attempt to parse for "(IP)". */
afteroffset = strstr (*strp, "(IP)");
if (afteroffset == NULL)
/* Make sure it's not in lower case. */
afteroffset = strstr (*strp, "(ip)");
if (afteroffset != NULL)
{
if (afteroffset != *strp)
{
/* Invalid offset present. */
errmsg = _("offset(IP) is not a valid form");
return errmsg;
}
else
{
*strp += 4;
*valuep = 0;
errmsg = NULL;
return errmsg;
}
}
/* Attempt to parse for DP. ex: mov w, offset(DP)
mov offset(DP),w */
/* Try parsing it as an address and see what comes back. */
afteroffset = strstr (*strp, "(DP)");
if (afteroffset == NULL)
/* Maybe it's in lower case. */
afteroffset = strstr (*strp, "(dp)");
if (afteroffset != NULL)
{
if (afteroffset == *strp)
{
/* No offset present. Use 0 by default. */
tempvalue = 0;
errmsg = NULL;
}
else
errmsg = cgen_parse_address (cd, strp, opindex,
BFD_RELOC_IP2K_FR_OFFSET,
& result_type, & tempvalue);
if (errmsg == NULL)
{
if (tempvalue <= 127)
{
/* Value is ok. Fix up the first 2 bits and return. */
*valuep = 0x0100 | tempvalue;
*strp += 4; /* Skip over the (DP) in *strp. */
return errmsg;
}
else
{
/* Found something there in front of (DP) but it's out
of range. */
errmsg = _("(DP) offset out of range.");
return errmsg;
}
}
}
/* Attempt to parse for SP. ex: mov w, offset(SP)
mov offset(SP), w. */
afteroffset = strstr (*strp, "(SP)");
if (afteroffset == NULL)
/* Maybe it's in lower case. */
afteroffset = strstr (*strp, "(sp)");
if (afteroffset != NULL)
{
if (afteroffset == *strp)
{
/* No offset present. Use 0 by default. */
tempvalue = 0;
errmsg = NULL;
}
else
errmsg = cgen_parse_address (cd, strp, opindex,
BFD_RELOC_IP2K_FR_OFFSET,
& result_type, & tempvalue);
if (errmsg == NULL)
{
if (tempvalue <= 127)
{
/* Value is ok. Fix up the first 2 bits and return. */
*valuep = 0x0180 | tempvalue;
*strp += 4; /* Skip over the (SP) in *strp. */
return errmsg;
}
else
{
/* Found something there in front of (SP) but it's out
of range. */
errmsg = _("(SP) offset out of range.");
return errmsg;
}
}
}
/* Attempt to parse as an address. */
*strp = old_strp;
errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_IP2K_FR9,
& result_type, & value);
if (errmsg == NULL)
{
*valuep = value;
/* If a parenthesis is found, warn about invalid form. */
if (**strp == '(')
errmsg = _("illegal use of parentheses");
/* If a numeric value is specified, ensure that it is between
1 and 255. */
else if (result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
{
if (value < 0x1 || value > 0xff)
errmsg = _("operand out of range (not between 1 and 255)");
}
}
return errmsg;
}
static const char *
parse_addr16 (CGEN_CPU_DESC cd,
const char **strp,
int opindex,
unsigned long *valuep)
{
const char *errmsg;
enum cgen_parse_operand_result result_type;
bfd_reloc_code_real_type code = BFD_RELOC_NONE;
bfd_vma value;
if (opindex == (CGEN_OPERAND_TYPE) IP2K_OPERAND_ADDR16H)
code = BFD_RELOC_IP2K_HI8DATA;
else if (opindex == (CGEN_OPERAND_TYPE) IP2K_OPERAND_ADDR16L)
code = BFD_RELOC_IP2K_LO8DATA;
else
{
/* Something is very wrong. opindex has to be one of the above. */
errmsg = _("parse_addr16: invalid opindex.");
return errmsg;
}
errmsg = cgen_parse_address (cd, strp, opindex, code,
& result_type, & value);
if (errmsg == NULL)
{
/* We either have a relocation or a number now. */
if (result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
{
/* We got a number back. */
if (code == BFD_RELOC_IP2K_HI8DATA)
value >>= 8;
else
/* code = BFD_RELOC_IP2K_LOW8DATA. */
value &= 0x00FF;
}
*valuep = value;
}
return errmsg;
}
static const char *
parse_addr16_cjp (CGEN_CPU_DESC cd,
const char **strp,
int opindex,
unsigned long *valuep)
{
const char *errmsg;
enum cgen_parse_operand_result result_type;
bfd_reloc_code_real_type code = BFD_RELOC_NONE;
bfd_vma value;
if (opindex == (CGEN_OPERAND_TYPE) IP2K_OPERAND_ADDR16CJP)
code = BFD_RELOC_IP2K_ADDR16CJP;
else if (opindex == (CGEN_OPERAND_TYPE) IP2K_OPERAND_ADDR16P)
code = BFD_RELOC_IP2K_PAGE3;
errmsg = cgen_parse_address (cd, strp, opindex, code,
& result_type, & value);
if (errmsg == NULL)
{
if (result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
{
if ((value & 0x1) == 0) /* If the address is even .... */
{
if (opindex == (CGEN_OPERAND_TYPE) IP2K_OPERAND_ADDR16CJP)
*valuep = (value >> 1) & 0x1FFF; /* Should mask be 1FFF? */
else if (opindex == (CGEN_OPERAND_TYPE) IP2K_OPERAND_ADDR16P)
*valuep = (value >> 14) & 0x7;
}
else
errmsg = _("Byte address required. - must be even.");
}
else if (result_type == CGEN_PARSE_OPERAND_RESULT_QUEUED)
{
/* This will happen for things like (s2-s1) where s2 and s1
are labels. */
*valuep = value;
}
else
errmsg = _("cgen_parse_address returned a symbol. Literal required.");
}
return errmsg;
}
static const char *
parse_lit8 (CGEN_CPU_DESC cd,
const char **strp,
int opindex,
long *valuep)
{
const char *errmsg;
enum cgen_parse_operand_result result_type;
bfd_reloc_code_real_type code = BFD_RELOC_NONE;
bfd_vma value;
/* Parse %OP relocating operators. */
if (strncmp (*strp, "%bank", 5) == 0)
{
*strp += 5;
code = BFD_RELOC_IP2K_BANK;
}
else if (strncmp (*strp, "%lo8data", 8) == 0)
{
*strp += 8;
code = BFD_RELOC_IP2K_LO8DATA;
}
else if (strncmp (*strp, "%hi8data", 8) == 0)
{
*strp += 8;
code = BFD_RELOC_IP2K_HI8DATA;
}
else if (strncmp (*strp, "%ex8data", 8) == 0)
{
*strp += 8;
code = BFD_RELOC_IP2K_EX8DATA;
}
else if (strncmp (*strp, "%lo8insn", 8) == 0)
{
*strp += 8;
code = BFD_RELOC_IP2K_LO8INSN;
}
else if (strncmp (*strp, "%hi8insn", 8) == 0)
{
*strp += 8;
code = BFD_RELOC_IP2K_HI8INSN;
}
/* Parse %op operand. */
if (code != BFD_RELOC_NONE)
{
errmsg = cgen_parse_address (cd, strp, opindex, code,
& result_type, & value);
if ((errmsg == NULL) &&
(result_type != CGEN_PARSE_OPERAND_RESULT_QUEUED))
errmsg = _("percent-operator operand is not a symbol");
*valuep = value;
}
/* Parse as a number. */
else
{
errmsg = cgen_parse_signed_integer (cd, strp, opindex, valuep);
/* Truncate to eight bits to accept both signed and unsigned input. */
if (errmsg == NULL)
*valuep &= 0xFF;
}
return errmsg;
}
static const char *
parse_bit3 (CGEN_CPU_DESC cd,
const char **strp,
int opindex,
unsigned long *valuep)
{
const char *errmsg;
char mode = 0;
long count = 0;
unsigned long value;
if (strncmp (*strp, "%bit", 4) == 0)
{
*strp += 4;
mode = 1;
}
else if (strncmp (*strp, "%msbbit", 7) == 0)
{
*strp += 7;
mode = 1;
}
else if (strncmp (*strp, "%lsbbit", 7) == 0)
{
*strp += 7;
mode = 2;
}
errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
if (errmsg)
return errmsg;
if (mode)
{
value = * valuep;
if (value == 0)
{
errmsg = _("Attempt to find bit index of 0");
return errmsg;
}
if (mode == 1)
{
count = 31;
while ((value & 0x80000000) == 0)
{
count--;
value <<= 1;
}
}
else if (mode == 2)
{
count = 0;
while ((value & 0x00000001) == 0)
{
count++;
value >>= 1;
}
}
*valuep = count;
}
return errmsg;
}
/* -- dis.c */
static void
print_fr (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
void * dis_info,
long value,
unsigned int attrs ATTRIBUTE_UNUSED,
bfd_vma pc ATTRIBUTE_UNUSED,
int length ATTRIBUTE_UNUSED)
{
disassemble_info *info = (disassemble_info *) dis_info;
const CGEN_KEYWORD_ENTRY *ke;
extern CGEN_KEYWORD ip2k_cgen_opval_register_names;
long offsettest;
long offsetvalue;
if (value == 0) /* This is (IP). */
{
(*info->fprintf_func) (info->stream, "%s", "(IP)");
return;
}
offsettest = value >> 7;
offsetvalue = value & 0x7F;
/* Check to see if first two bits are 10 -> (DP). */
if (offsettest == 2)
{
if (offsetvalue == 0)
(*info->fprintf_func) (info->stream, "%s","(DP)");
else
(*info->fprintf_func) (info->stream, "$%lx%s", offsetvalue, "(DP)");
return;
}
/* Check to see if first two bits are 11 -> (SP). */
if (offsettest == 3)
{
if (offsetvalue == 0)
(*info->fprintf_func) (info->stream, "%s", "(SP)");
else
(*info->fprintf_func) (info->stream, "$%lx%s", offsetvalue,"(SP)");
return;
}
/* Attempt to print as a register keyword. */
ke = cgen_keyword_lookup_value (& ip2k_cgen_opval_register_names, value);
if (ke != NULL)
(*info->fprintf_func) (info->stream, "%s", ke->name);
else
/* Print as an address literal. */
(*info->fprintf_func) (info->stream, "$%02lx", value);
}
static void
print_dollarhex (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
void * dis_info,
long value,
unsigned int attrs ATTRIBUTE_UNUSED,
bfd_vma pc ATTRIBUTE_UNUSED,
int length ATTRIBUTE_UNUSED)
{
disassemble_info *info = (disassemble_info *) dis_info;
(*info->fprintf_func) (info->stream, "$%lx", value);
}
static void
print_dollarhex8 (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
void * dis_info,
long value,
unsigned int attrs ATTRIBUTE_UNUSED,
bfd_vma pc ATTRIBUTE_UNUSED,
int length ATTRIBUTE_UNUSED)
{
disassemble_info *info = (disassemble_info *) dis_info;
(*info->fprintf_func) (info->stream, "$%02lx", value);
}
static void
print_dollarhex_addr16h (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
void * dis_info,
long value,
unsigned int attrs ATTRIBUTE_UNUSED,
bfd_vma pc ATTRIBUTE_UNUSED,
int length ATTRIBUTE_UNUSED)
{
disassemble_info *info = (disassemble_info *) dis_info;
/* This is a loadh instruction. Shift the value to the left
by 8 bits so that disassembled code will reassemble properly. */
value = ((value << 8) & 0xFF00);
(*info->fprintf_func) (info->stream, "$%04lx", value);
}
static void
print_dollarhex_addr16l (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
void * dis_info,
long value,
unsigned int attrs ATTRIBUTE_UNUSED,
bfd_vma pc ATTRIBUTE_UNUSED,
int length ATTRIBUTE_UNUSED)
{
disassemble_info *info = (disassemble_info *) dis_info;
(*info->fprintf_func) (info->stream, "$%04lx", value);
}
static void
print_dollarhex_p (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
void * dis_info,
long value,
unsigned int attrs ATTRIBUTE_UNUSED,
bfd_vma pc ATTRIBUTE_UNUSED,
int length ATTRIBUTE_UNUSED)
{
disassemble_info *info = (disassemble_info *) dis_info;
value = ((value << 14) & 0x1C000);
;value = (value & 0x1FFFF);
(*info->fprintf_func) (info->stream, "$%05lx", value);
}
static void
print_dollarhex_cj (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
void * dis_info,
long value,
unsigned int attrs ATTRIBUTE_UNUSED,
bfd_vma pc ATTRIBUTE_UNUSED,
int length ATTRIBUTE_UNUSED)
{
disassemble_info *info = (disassemble_info *) dis_info;
value = ((value << 1) & 0x1FFFF);
(*info->fprintf_func) (info->stream, "$%05lx", value);
}
static void
print_decimal (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
void * dis_info,
long value,
unsigned int attrs ATTRIBUTE_UNUSED,
bfd_vma pc ATTRIBUTE_UNUSED,
int length ATTRIBUTE_UNUSED)
{
disassemble_info *info = (disassemble_info *) dis_info;
(*info->fprintf_func) (info->stream, "%ld", value);
}
/* -- */