633 lines
16 KiB
C
633 lines
16 KiB
C
/* IP2K opcode support. -*- C -*-
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Copyright 2002, 2005, 2011 Free Software Foundation, Inc.
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Contributed by Red Hat Inc;
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This file is part of the GNU Binutils.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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/*
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Each section is delimited with start and end markers.
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<arch>-opc.h additions use: "-- opc.h"
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<arch>-opc.c additions use: "-- opc.c"
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<arch>-asm.c additions use: "-- asm.c"
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<arch>-dis.c additions use: "-- dis.c"
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<arch>-ibd.h additions use: "-- ibd.h". */
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/* -- opc.h */
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/* Check applicability of instructions against machines. */
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#define CGEN_VALIDATE_INSN_SUPPORTED
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/* Allows reason codes to be output when assembler errors occur. */
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#define CGEN_VERBOSE_ASSEMBLER_ERRORS
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/* Override disassembly hashing - there are variable bits in the top
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byte of these instructions. */
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#define CGEN_DIS_HASH_SIZE 8
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#define CGEN_DIS_HASH(buf, value) \
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(((* (unsigned char*) (buf)) >> 5) % CGEN_DIS_HASH_SIZE)
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#define CGEN_ASM_HASH_SIZE 127
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#define CGEN_ASM_HASH(insn) ip2k_asm_hash (insn)
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extern unsigned int ip2k_asm_hash (const char *);
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extern int ip2k_cgen_insn_supported (CGEN_CPU_DESC, const CGEN_INSN *);
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/* -- opc.c */
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#include "safe-ctype.h"
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/* A better hash function for instruction mnemonics. */
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unsigned int
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ip2k_asm_hash (const char* insn)
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{
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unsigned int hash;
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const char* m = insn;
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for (hash = 0; *m && ! ISSPACE (*m); m++)
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hash = (hash * 23) ^ (0x1F & TOLOWER (*m));
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/* printf ("%s %d\n", insn, (hash % CGEN_ASM_HASH_SIZE)); */
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return hash % CGEN_ASM_HASH_SIZE;
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}
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/* Special check to ensure that instruction exists for given machine. */
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int
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ip2k_cgen_insn_supported (CGEN_CPU_DESC cd, const CGEN_INSN *insn)
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{
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int machs = CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_MACH);
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/* No mach attribute? Assume it's supported for all machs. */
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if (machs == 0)
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return 1;
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return (machs & cd->machs) != 0;
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}
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/* -- asm.c */
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static const char *
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parse_fr (CGEN_CPU_DESC cd,
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const char **strp,
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int opindex,
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unsigned long *valuep)
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{
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const char *errmsg;
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const char *old_strp;
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char *afteroffset;
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enum cgen_parse_operand_result result_type;
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bfd_vma value;
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extern CGEN_KEYWORD ip2k_cgen_opval_register_names;
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bfd_vma tempvalue;
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old_strp = *strp;
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afteroffset = NULL;
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/* Check here to see if you're about to try parsing a w as the first arg
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and return an error if you are. */
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if ((strncmp (*strp, "w", 1) == 0) || (strncmp (*strp, "W", 1) == 0))
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{
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(*strp)++;
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if ((strncmp (*strp, ",", 1) == 0) || ISSPACE (**strp))
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{
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/* We've been passed a w. Return with an error message so that
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cgen will try the next parsing option. */
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errmsg = _("W keyword invalid in FR operand slot.");
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return errmsg;
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}
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*strp = old_strp;
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}
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/* Attempt parse as register keyword. */
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errmsg = cgen_parse_keyword (cd, strp, & ip2k_cgen_opval_register_names,
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(long *) valuep);
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if (*strp != NULL
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&& errmsg == NULL)
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return errmsg;
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/* Attempt to parse for "(IP)". */
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afteroffset = strstr (*strp, "(IP)");
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if (afteroffset == NULL)
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/* Make sure it's not in lower case. */
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afteroffset = strstr (*strp, "(ip)");
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if (afteroffset != NULL)
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{
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if (afteroffset != *strp)
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{
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/* Invalid offset present. */
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errmsg = _("offset(IP) is not a valid form");
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return errmsg;
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}
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else
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{
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*strp += 4;
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*valuep = 0;
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errmsg = NULL;
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return errmsg;
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}
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}
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/* Attempt to parse for DP. ex: mov w, offset(DP)
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mov offset(DP),w */
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/* Try parsing it as an address and see what comes back. */
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afteroffset = strstr (*strp, "(DP)");
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if (afteroffset == NULL)
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/* Maybe it's in lower case. */
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afteroffset = strstr (*strp, "(dp)");
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if (afteroffset != NULL)
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{
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if (afteroffset == *strp)
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{
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/* No offset present. Use 0 by default. */
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tempvalue = 0;
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errmsg = NULL;
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}
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else
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errmsg = cgen_parse_address (cd, strp, opindex,
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BFD_RELOC_IP2K_FR_OFFSET,
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& result_type, & tempvalue);
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if (errmsg == NULL)
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{
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if (tempvalue <= 127)
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{
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/* Value is ok. Fix up the first 2 bits and return. */
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*valuep = 0x0100 | tempvalue;
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*strp += 4; /* Skip over the (DP) in *strp. */
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return errmsg;
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}
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else
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{
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/* Found something there in front of (DP) but it's out
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of range. */
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errmsg = _("(DP) offset out of range.");
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return errmsg;
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}
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}
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}
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/* Attempt to parse for SP. ex: mov w, offset(SP)
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mov offset(SP), w. */
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afteroffset = strstr (*strp, "(SP)");
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if (afteroffset == NULL)
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/* Maybe it's in lower case. */
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afteroffset = strstr (*strp, "(sp)");
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if (afteroffset != NULL)
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{
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if (afteroffset == *strp)
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{
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/* No offset present. Use 0 by default. */
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tempvalue = 0;
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errmsg = NULL;
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}
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else
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errmsg = cgen_parse_address (cd, strp, opindex,
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BFD_RELOC_IP2K_FR_OFFSET,
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& result_type, & tempvalue);
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if (errmsg == NULL)
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{
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if (tempvalue <= 127)
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{
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/* Value is ok. Fix up the first 2 bits and return. */
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*valuep = 0x0180 | tempvalue;
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*strp += 4; /* Skip over the (SP) in *strp. */
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return errmsg;
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}
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else
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{
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/* Found something there in front of (SP) but it's out
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of range. */
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errmsg = _("(SP) offset out of range.");
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return errmsg;
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}
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}
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}
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/* Attempt to parse as an address. */
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*strp = old_strp;
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errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_IP2K_FR9,
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& result_type, & value);
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if (errmsg == NULL)
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{
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*valuep = value;
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/* If a parenthesis is found, warn about invalid form. */
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if (**strp == '(')
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errmsg = _("illegal use of parentheses");
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/* If a numeric value is specified, ensure that it is between
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1 and 255. */
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else if (result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
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{
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if (value < 0x1 || value > 0xff)
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errmsg = _("operand out of range (not between 1 and 255)");
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}
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}
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return errmsg;
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}
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static const char *
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parse_addr16 (CGEN_CPU_DESC cd,
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const char **strp,
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int opindex,
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unsigned long *valuep)
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{
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const char *errmsg;
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enum cgen_parse_operand_result result_type;
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bfd_reloc_code_real_type code = BFD_RELOC_NONE;
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bfd_vma value;
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if (opindex == (CGEN_OPERAND_TYPE) IP2K_OPERAND_ADDR16H)
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code = BFD_RELOC_IP2K_HI8DATA;
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else if (opindex == (CGEN_OPERAND_TYPE) IP2K_OPERAND_ADDR16L)
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code = BFD_RELOC_IP2K_LO8DATA;
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else
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{
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/* Something is very wrong. opindex has to be one of the above. */
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errmsg = _("parse_addr16: invalid opindex.");
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return errmsg;
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}
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errmsg = cgen_parse_address (cd, strp, opindex, code,
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& result_type, & value);
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if (errmsg == NULL)
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{
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/* We either have a relocation or a number now. */
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if (result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
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{
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/* We got a number back. */
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if (code == BFD_RELOC_IP2K_HI8DATA)
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value >>= 8;
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else
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/* code = BFD_RELOC_IP2K_LOW8DATA. */
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value &= 0x00FF;
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}
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*valuep = value;
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}
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return errmsg;
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}
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static const char *
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parse_addr16_cjp (CGEN_CPU_DESC cd,
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const char **strp,
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int opindex,
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unsigned long *valuep)
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{
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const char *errmsg;
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enum cgen_parse_operand_result result_type;
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bfd_reloc_code_real_type code = BFD_RELOC_NONE;
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bfd_vma value;
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if (opindex == (CGEN_OPERAND_TYPE) IP2K_OPERAND_ADDR16CJP)
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code = BFD_RELOC_IP2K_ADDR16CJP;
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else if (opindex == (CGEN_OPERAND_TYPE) IP2K_OPERAND_ADDR16P)
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code = BFD_RELOC_IP2K_PAGE3;
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errmsg = cgen_parse_address (cd, strp, opindex, code,
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& result_type, & value);
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if (errmsg == NULL)
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{
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if (result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
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{
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if ((value & 0x1) == 0) /* If the address is even .... */
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{
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if (opindex == (CGEN_OPERAND_TYPE) IP2K_OPERAND_ADDR16CJP)
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*valuep = (value >> 1) & 0x1FFF; /* Should mask be 1FFF? */
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else if (opindex == (CGEN_OPERAND_TYPE) IP2K_OPERAND_ADDR16P)
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*valuep = (value >> 14) & 0x7;
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}
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else
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errmsg = _("Byte address required. - must be even.");
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}
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else if (result_type == CGEN_PARSE_OPERAND_RESULT_QUEUED)
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{
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/* This will happen for things like (s2-s1) where s2 and s1
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are labels. */
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*valuep = value;
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}
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else
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errmsg = _("cgen_parse_address returned a symbol. Literal required.");
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}
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return errmsg;
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}
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static const char *
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parse_lit8 (CGEN_CPU_DESC cd,
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const char **strp,
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int opindex,
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long *valuep)
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{
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const char *errmsg;
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enum cgen_parse_operand_result result_type;
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bfd_reloc_code_real_type code = BFD_RELOC_NONE;
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bfd_vma value;
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/* Parse %OP relocating operators. */
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if (strncmp (*strp, "%bank", 5) == 0)
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{
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*strp += 5;
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code = BFD_RELOC_IP2K_BANK;
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}
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else if (strncmp (*strp, "%lo8data", 8) == 0)
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{
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*strp += 8;
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code = BFD_RELOC_IP2K_LO8DATA;
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}
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else if (strncmp (*strp, "%hi8data", 8) == 0)
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{
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*strp += 8;
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code = BFD_RELOC_IP2K_HI8DATA;
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}
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else if (strncmp (*strp, "%ex8data", 8) == 0)
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{
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*strp += 8;
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code = BFD_RELOC_IP2K_EX8DATA;
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}
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else if (strncmp (*strp, "%lo8insn", 8) == 0)
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{
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*strp += 8;
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code = BFD_RELOC_IP2K_LO8INSN;
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}
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else if (strncmp (*strp, "%hi8insn", 8) == 0)
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{
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*strp += 8;
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code = BFD_RELOC_IP2K_HI8INSN;
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}
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/* Parse %op operand. */
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if (code != BFD_RELOC_NONE)
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{
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errmsg = cgen_parse_address (cd, strp, opindex, code,
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& result_type, & value);
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if ((errmsg == NULL) &&
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(result_type != CGEN_PARSE_OPERAND_RESULT_QUEUED))
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errmsg = _("percent-operator operand is not a symbol");
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*valuep = value;
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}
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/* Parse as a number. */
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else
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{
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errmsg = cgen_parse_signed_integer (cd, strp, opindex, valuep);
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/* Truncate to eight bits to accept both signed and unsigned input. */
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if (errmsg == NULL)
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*valuep &= 0xFF;
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}
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return errmsg;
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}
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static const char *
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parse_bit3 (CGEN_CPU_DESC cd,
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const char **strp,
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int opindex,
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unsigned long *valuep)
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{
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const char *errmsg;
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char mode = 0;
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long count = 0;
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unsigned long value;
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if (strncmp (*strp, "%bit", 4) == 0)
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{
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*strp += 4;
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mode = 1;
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}
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else if (strncmp (*strp, "%msbbit", 7) == 0)
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{
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*strp += 7;
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mode = 1;
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}
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else if (strncmp (*strp, "%lsbbit", 7) == 0)
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{
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*strp += 7;
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mode = 2;
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}
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errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
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if (errmsg)
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return errmsg;
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if (mode)
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{
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value = * valuep;
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if (value == 0)
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{
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errmsg = _("Attempt to find bit index of 0");
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return errmsg;
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}
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if (mode == 1)
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{
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count = 31;
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while ((value & 0x80000000) == 0)
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{
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count--;
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value <<= 1;
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}
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}
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else if (mode == 2)
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{
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count = 0;
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while ((value & 0x00000001) == 0)
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{
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count++;
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value >>= 1;
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}
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}
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*valuep = count;
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}
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return errmsg;
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}
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/* -- dis.c */
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static void
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print_fr (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
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void * dis_info,
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long value,
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unsigned int attrs ATTRIBUTE_UNUSED,
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bfd_vma pc ATTRIBUTE_UNUSED,
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int length ATTRIBUTE_UNUSED)
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{
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disassemble_info *info = (disassemble_info *) dis_info;
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const CGEN_KEYWORD_ENTRY *ke;
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extern CGEN_KEYWORD ip2k_cgen_opval_register_names;
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long offsettest;
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long offsetvalue;
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if (value == 0) /* This is (IP). */
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{
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(*info->fprintf_func) (info->stream, "%s", "(IP)");
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return;
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}
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offsettest = value >> 7;
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offsetvalue = value & 0x7F;
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/* Check to see if first two bits are 10 -> (DP). */
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if (offsettest == 2)
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{
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if (offsetvalue == 0)
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(*info->fprintf_func) (info->stream, "%s","(DP)");
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else
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(*info->fprintf_func) (info->stream, "$%lx%s", offsetvalue, "(DP)");
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return;
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}
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/* Check to see if first two bits are 11 -> (SP). */
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if (offsettest == 3)
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{
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if (offsetvalue == 0)
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(*info->fprintf_func) (info->stream, "%s", "(SP)");
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else
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(*info->fprintf_func) (info->stream, "$%lx%s", offsetvalue,"(SP)");
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return;
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}
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/* Attempt to print as a register keyword. */
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ke = cgen_keyword_lookup_value (& ip2k_cgen_opval_register_names, value);
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if (ke != NULL)
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(*info->fprintf_func) (info->stream, "%s", ke->name);
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else
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/* Print as an address literal. */
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(*info->fprintf_func) (info->stream, "$%02lx", value);
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}
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static void
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print_dollarhex (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
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void * dis_info,
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long value,
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unsigned int attrs ATTRIBUTE_UNUSED,
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bfd_vma pc ATTRIBUTE_UNUSED,
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int length ATTRIBUTE_UNUSED)
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{
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disassemble_info *info = (disassemble_info *) dis_info;
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||
|
||
(*info->fprintf_func) (info->stream, "$%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);
|
||
}
|
||
|
||
|
||
|
||
/* -- */
|
||
|