475 lines
12 KiB
C
475 lines
12 KiB
C
/* Morpho Technologies mRISC opcode support, for GNU Binutils. -*- C -*-
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Copyright 2001 Free Software Foundation, Inc.
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Contributed by Red Hat Inc; developed under contract from
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Morpho Technologies.
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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 2 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, MA 02110-1301, USA.
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*/
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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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*/
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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) (((* (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) mt_asm_hash (insn)
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extern unsigned int mt_asm_hash (const char *);
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extern int mt_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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/* Special check to ensure that instruction exists for given machine. */
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int
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mt_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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/* A better hash function for instruction mnemonics. */
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unsigned int
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mt_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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/* -- asm.c */
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/* Range checking for signed numbers. Returns 0 if acceptable
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and 1 if the value is out of bounds for a signed quantity. */
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static int
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signed_out_of_bounds (long val)
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{
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if ((val < -32768) || (val > 32767))
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return 1;
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return 0;
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}
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static const char *
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parse_loopsize (CGEN_CPU_DESC cd,
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const char **strp,
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int opindex,
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void *arg)
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{
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signed long * valuep = (signed long *) arg;
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const char *errmsg;
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bfd_reloc_code_real_type code = BFD_RELOC_NONE;
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enum cgen_parse_operand_result result_type;
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bfd_vma value;
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/* Is it a control transfer instructions? */
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if (opindex == (CGEN_OPERAND_TYPE) MT_OPERAND_LOOPSIZE)
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{
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code = BFD_RELOC_MT_PCINSN8;
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errmsg = cgen_parse_address (cd, strp, opindex, code,
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& result_type, & value);
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*valuep = value;
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return errmsg;
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}
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abort ();
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}
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static const char *
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parse_imm16 (CGEN_CPU_DESC cd,
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const char **strp,
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int opindex,
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void *arg)
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{
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signed long * valuep = (signed long *) arg;
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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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/* Is it a control transfer instructions? */
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if (opindex == (CGEN_OPERAND_TYPE) MT_OPERAND_IMM16O)
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{
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code = BFD_RELOC_16_PCREL;
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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 (signed_out_of_bounds (value))
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errmsg = _("Operand out of range. Must be between -32768 and 32767.");
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}
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*valuep = value;
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return errmsg;
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}
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/* If it's not a control transfer instruction, then
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we have to check for %OP relocating operators. */
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if (opindex == (CGEN_OPERAND_TYPE) MT_OPERAND_IMM16L)
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;
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else if (strncmp (*strp, "%hi16", 5) == 0)
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{
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*strp += 5;
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code = BFD_RELOC_HI16;
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}
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else if (strncmp (*strp, "%lo16", 5) == 0)
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{
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*strp += 5;
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code = BFD_RELOC_LO16;
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}
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/* If we found a %OP relocating operator, then parse it as an address.
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If not, we need to parse it as an integer, either signed or unsigned
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depending on which operand type we have. */
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if (code != BFD_RELOC_NONE)
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{
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/* %OP relocating operator found. */
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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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switch (result_type)
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{
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case (CGEN_PARSE_OPERAND_RESULT_NUMBER):
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if (code == BFD_RELOC_HI16)
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value = (value >> 16) & 0xFFFF;
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else if (code == BFD_RELOC_LO16)
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value = value & 0xFFFF;
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else
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errmsg = _("Biiiig Trouble in parse_imm16!");
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break;
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case (CGEN_PARSE_OPERAND_RESULT_QUEUED):
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/* No special processing for this case. */
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break;
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default:
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errmsg = _("%operator operand is not a symbol");
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break;
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}
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}
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*valuep = value;
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}
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else
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{
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/* Parse hex values like 0xffff as unsigned, and sign extend
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them manually. */
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int parse_signed = (opindex == (CGEN_OPERAND_TYPE)MT_OPERAND_IMM16);
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if ((*strp)[0] == '0'
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&& ((*strp)[1] == 'x' || (*strp)[1] == 'X'))
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parse_signed = 0;
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/* No relocating operator. Parse as an number. */
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if (parse_signed)
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{
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/* Parse as as signed integer. */
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errmsg = cgen_parse_signed_integer (cd, strp, opindex, valuep);
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if (errmsg == NULL)
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{
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#if 0
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/* Manual range checking is needed for the signed case. */
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if (*valuep & 0x8000)
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value = 0xffff0000 | *valuep;
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else
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value = *valuep;
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if (signed_out_of_bounds (value))
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errmsg = _("Operand out of range. Must be between -32768 and 32767.");
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/* Truncate to 16 bits. This is necessary
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because cgen will have sign extended *valuep. */
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*valuep &= 0xFFFF;
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#endif
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}
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}
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else
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{
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/* MT_OPERAND_IMM16Z. Parse as an unsigned integer. */
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errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, (unsigned long *) valuep);
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if (opindex == (CGEN_OPERAND_TYPE) MT_OPERAND_IMM16
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&& *valuep >= 0x8000
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&& *valuep <= 0xffff)
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*valuep -= 0x10000;
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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_dup (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 = NULL;
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if (strncmp (*strp, "dup", 3) == 0 || strncmp (*strp, "DUP", 3) == 0)
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{
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*strp += 3;
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*valuep = 1;
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}
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else if (strncmp (*strp, "xx", 2) == 0 || strncmp (*strp, "XX", 2) == 0)
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{
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*strp += 2;
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*valuep = 0;
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}
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else
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errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
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return errmsg;
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}
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static const char *
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parse_ball (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 = NULL;
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if (strncmp (*strp, "all", 3) == 0 || strncmp (*strp, "ALL", 3) == 0)
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{
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*strp += 3;
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*valuep = 1;
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}
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else if (strncmp (*strp, "one", 3) == 0 || strncmp (*strp, "ONE", 3) == 0)
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{
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*strp += 3;
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*valuep = 0;
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}
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else
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errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
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return errmsg;
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}
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static const char *
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parse_xmode (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 = NULL;
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if (strncmp (*strp, "pm", 2) == 0 || strncmp (*strp, "PM", 2) == 0)
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{
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*strp += 2;
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*valuep = 1;
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}
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else if (strncmp (*strp, "xm", 2) == 0 || strncmp (*strp, "XM", 2) == 0)
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{
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*strp += 2;
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*valuep = 0;
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}
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else
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errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
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return errmsg;
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}
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static const char *
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parse_rc (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 = NULL;
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if (strncmp (*strp, "r", 1) == 0 || strncmp (*strp, "R", 1) == 0)
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{
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*strp += 1;
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*valuep = 1;
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}
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else if (strncmp (*strp, "c", 1) == 0 || strncmp (*strp, "C", 1) == 0)
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{
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*strp += 1;
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*valuep = 0;
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}
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else
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errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
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return errmsg;
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}
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static const char *
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parse_cbrb (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 = NULL;
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if (strncmp (*strp, "rb", 2) == 0 || strncmp (*strp, "RB", 2) == 0)
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{
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*strp += 2;
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*valuep = 1;
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}
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else if (strncmp (*strp, "cb", 2) == 0 || strncmp (*strp, "CB", 2) == 0)
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{
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*strp += 2;
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*valuep = 0;
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}
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else
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errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
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return errmsg;
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}
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static const char *
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parse_rbbc (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 = NULL;
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if (strncmp (*strp, "rt", 2) == 0 || strncmp (*strp, "RT", 2) == 0)
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{
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*strp += 2;
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*valuep = 0;
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}
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else if (strncmp (*strp, "br1", 3) == 0 || strncmp (*strp, "BR1", 3) == 0)
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{
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*strp += 3;
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*valuep = 1;
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}
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else if (strncmp (*strp, "br2", 3) == 0 || strncmp (*strp, "BR2", 3) == 0)
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{
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*strp += 3;
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*valuep = 2;
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}
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else if (strncmp (*strp, "cs", 2) == 0 || strncmp (*strp, "CS", 2) == 0)
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{
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*strp += 2;
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*valuep = 3;
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}
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else
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errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
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return errmsg;
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}
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static const char *
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parse_type (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 = NULL;
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if (strncmp (*strp, "odd", 3) == 0 || strncmp (*strp, "ODD", 3) == 0)
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{
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*strp += 3;
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*valuep = 0;
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}
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else if (strncmp (*strp, "even", 4) == 0 || strncmp (*strp, "EVEN", 4) == 0)
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{
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*strp += 4;
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*valuep = 1;
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}
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else if (strncmp (*strp, "oe", 2) == 0 || strncmp (*strp, "OE", 2) == 0)
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{
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*strp += 2;
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*valuep = 2;
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}
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else
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errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
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if ((errmsg == NULL) && (*valuep == 3))
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errmsg = _("invalid operand. type may have values 0,1,2 only.");
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return errmsg;
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}
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/* -- dis.c */
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static void print_dollarhex (CGEN_CPU_DESC, PTR, long, unsigned, bfd_vma, int);
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static void print_pcrel (CGEN_CPU_DESC, PTR, long, unsigned, bfd_vma, int);
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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);
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if (0)
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print_normal (cd, dis_info, value, attrs, pc, length);
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}
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static void
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print_pcrel (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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print_address (cd, dis_info, value + pc, attrs, pc, length);
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}
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/* -- */
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