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+/* Morpho Technologies mRISC opcode support, for GNU Binutils. -*- C -*-
+ Copyright 2001 Free Software Foundation, Inc.
+
+ Contributed by Red Hat Inc; developed under contract from
+ Morpho Technologies.
+
+ 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.
+
+*/
+
+/*
+ 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) ms1_asm_hash (insn)
+
+extern unsigned int ms1_asm_hash (const char *);
+
+extern int ms1_cgen_insn_supported (CGEN_CPU_DESC, const CGEN_INSN *);
+
+
+/* -- opc.c */
+#include "safe-ctype.h"
+
+/* Special check to ensure that instruction exists for given machine. */
+
+int
+ms1_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);
+}
+
+/* A better hash function for instruction mnemonics. */
+
+unsigned int
+ms1_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;
+}
+
+
+/* -- asm.c */
+static int signed_out_of_bounds (long);
+static const char * parse_imm16 (CGEN_CPU_DESC, const char **, int, long *);
+static const char * parse_dup (CGEN_CPU_DESC, const char **, int, long *);
+static const char * parse_ball (CGEN_CPU_DESC, const char **, int, long *);
+static const char * parse_xmode (CGEN_CPU_DESC, const char **, int, long *);
+static const char * parse_rc (CGEN_CPU_DESC, const char **, int, long *);
+static const char * parse_cbrb (CGEN_CPU_DESC, const char **, int, long *);
+static const char * parse_rbbc (CGEN_CPU_DESC, const char **, int, long *);
+static const char * parse_type (CGEN_CPU_DESC, const char **, int, long *);
+
+/* Range checking for signed numbers. Returns 0 if acceptable
+ and 1 if the value is out of bounds for a signed quantity. */
+
+static int
+signed_out_of_bounds (long val)
+{
+ if ((val < -32768) || (val > 32767))
+ return 1;
+ return 0;
+}
+
+static const char *
+parse_imm16 (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;
+
+ /* Is it a control transfer instructions? */
+ if (opindex == (CGEN_OPERAND_TYPE) MS1_OPERAND_IMM16O)
+ {
+ code = BFD_RELOC_16_PCREL;
+ errmsg = cgen_parse_address (cd, strp, opindex, code,
+ & result_type, & value);
+ if (errmsg == NULL)
+ {
+ if (signed_out_of_bounds (value))
+ errmsg = _("Operand out of range. Must be between -32768 and 32767.");
+ }
+ *valuep = value;
+ return errmsg;
+ }
+
+ /* If it's not a control transfer instruction, then
+ we have to check for %OP relocating operators. */
+ if (strncmp (*strp, "%hi16", 5) == 0)
+ {
+ *strp += 5;
+ code = BFD_RELOC_HI16;
+ }
+ else if (strncmp (*strp, "%lo16", 5) == 0)
+ {
+ *strp += 5;
+ code = BFD_RELOC_LO16;
+ }
+
+ /* If we found a %OP relocating operator, then parse it as an address.
+ If not, we need to parse it as an integer, either signed or unsigned
+ depending on which operand type we have. */
+ if (code != BFD_RELOC_NONE)
+ {
+ /* %OP relocating operator found. */
+ errmsg = cgen_parse_address (cd, strp, opindex, code,
+ & result_type, & value);
+ if (errmsg == NULL)
+ {
+ switch (result_type)
+ {
+ case (CGEN_PARSE_OPERAND_RESULT_NUMBER):
+ if (code == BFD_RELOC_HI16)
+ value = (value >> 16) & 0xFFFF;
+ else if (code == BFD_RELOC_LO16)
+ value = value & 0xFFFF;
+ else
+ errmsg = _("Biiiig Trouble in parse_imm16!");
+ break;
+
+ case (CGEN_PARSE_OPERAND_RESULT_QUEUED):
+ /* No special processing for this case. */
+ break;
+
+ default:
+ errmsg = _("%operator operand is not a symbol");
+ break;
+ }
+ }
+ *valuep = value;
+ }
+ else
+ {
+ /* Parse hex values like 0xffff as unsigned, and sign extend
+ them manually. */
+ int parse_signed = (opindex == (CGEN_OPERAND_TYPE)MS1_OPERAND_IMM16);
+
+ if ((*strp)[0] == '0'
+ && ((*strp)[1] == 'x' || (*strp)[1] == 'X'))
+ parse_signed = 0;
+
+ /* No relocating operator. Parse as an number. */
+ if (parse_signed)
+ {
+ /* Parse as as signed integer. */
+
+ errmsg = cgen_parse_signed_integer (cd, strp, opindex, valuep);
+
+ if (errmsg == NULL)
+ {
+#if 0
+ /* Manual range checking is needed for the signed case. */
+ if (*valuep & 0x8000)
+ value = 0xffff0000 | *valuep;
+ else
+ value = *valuep;
+
+ if (signed_out_of_bounds (value))
+ errmsg = _("Operand out of range. Must be between -32768 and 32767.");
+ /* Truncate to 16 bits. This is necessary
+ because cgen will have sign extended *valuep. */
+ *valuep &= 0xFFFF;
+#endif
+ }
+ }
+ else
+ {
+ /* MS1_OPERAND_IMM16Z. Parse as an unsigned integer. */
+ errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
+
+ if (opindex == (CGEN_OPERAND_TYPE)MS1_OPERAND_IMM16
+ && *valuep >= 0x8000
+ && *valuep <= 0xffff)
+ *valuep -= 0x10000;
+ }
+ }
+
+ return errmsg;
+}
+
+
+static const char *
+parse_dup (CGEN_CPU_DESC cd,
+ const char **strp,
+ int opindex,
+ long *valuep)
+{
+ const char *errmsg = NULL;
+
+ if (strncmp (*strp, "dup", 3) == 0 || strncmp (*strp, "DUP", 3) == 0)
+ {
+ *strp += 3;
+ *valuep = 1;
+ }
+ else if (strncmp (*strp, "xx", 2) == 0 || strncmp (*strp, "XX", 2) == 0)
+ {
+ *strp += 2;
+ *valuep = 0;
+ }
+ else
+ errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
+
+ return errmsg;
+}
+
+
+static const char *
+parse_ball (CGEN_CPU_DESC cd,
+ const char **strp,
+ int opindex,
+ long *valuep)
+{
+ const char *errmsg = NULL;
+
+ if (strncmp (*strp, "all", 3) == 0 || strncmp (*strp, "ALL", 3) == 0)
+ {
+ *strp += 3;
+ *valuep = 1;
+ }
+ else if (strncmp (*strp, "one", 3) == 0 || strncmp (*strp, "ONE", 3) == 0)
+ {
+ *strp += 3;
+ *valuep = 0;
+ }
+ else
+ errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
+
+ return errmsg;
+}
+
+static const char *
+parse_xmode (CGEN_CPU_DESC cd,
+ const char **strp,
+ int opindex,
+ long *valuep)
+{
+ const char *errmsg = NULL;
+
+ if (strncmp (*strp, "pm", 2) == 0 || strncmp (*strp, "PM", 2) == 0)
+ {
+ *strp += 2;
+ *valuep = 1;
+ }
+ else if (strncmp (*strp, "xm", 2) == 0 || strncmp (*strp, "XM", 2) == 0)
+ {
+ *strp += 2;
+ *valuep = 0;
+ }
+ else
+ errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
+
+ return errmsg;
+}
+
+static const char *
+parse_rc (CGEN_CPU_DESC cd,
+ const char **strp,
+ int opindex,
+ long *valuep)
+{
+ const char *errmsg = NULL;
+
+ if (strncmp (*strp, "r", 1) == 0 || strncmp (*strp, "R", 1) == 0)
+ {
+ *strp += 1;
+ *valuep = 1;
+ }
+ else if (strncmp (*strp, "c", 1) == 0 || strncmp (*strp, "C", 1) == 0)
+ {
+ *strp += 1;
+ *valuep = 0;
+ }
+ else
+ errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
+
+ return errmsg;
+}
+
+static const char *
+parse_cbrb (CGEN_CPU_DESC cd,
+ const char **strp,
+ int opindex,
+ long *valuep)
+{
+ const char *errmsg = NULL;
+
+ if (strncmp (*strp, "rb", 2) == 0 || strncmp (*strp, "RB", 2) == 0)
+ {
+ *strp += 2;
+ *valuep = 1;
+ }
+ else if (strncmp (*strp, "cb", 2) == 0 || strncmp (*strp, "CB", 2) == 0)
+ {
+ *strp += 2;
+ *valuep = 0;
+ }
+ else
+ errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
+
+ return errmsg;
+}
+
+static const char *
+parse_rbbc (CGEN_CPU_DESC cd,
+ const char **strp,
+ int opindex,
+ long *valuep)
+{
+ const char *errmsg = NULL;
+
+ if (strncmp (*strp, "rt", 2) == 0 || strncmp (*strp, "RT", 2) == 0)
+ {
+ *strp += 2;
+ *valuep = 0;
+ }
+ else if (strncmp (*strp, "br1", 3) == 0 || strncmp (*strp, "BR1", 3) == 0)
+ {
+ *strp += 3;
+ *valuep = 1;
+ }
+ else if (strncmp (*strp, "br2", 3) == 0 || strncmp (*strp, "BR2", 3) == 0)
+ {
+ *strp += 3;
+ *valuep = 2;
+ }
+ else if (strncmp (*strp, "cs", 2) == 0 || strncmp (*strp, "CS", 2) == 0)
+ {
+ *strp += 2;
+ *valuep = 3;
+ }
+ else
+ errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
+
+ return errmsg;
+}
+
+static const char *
+parse_type (CGEN_CPU_DESC cd,
+ const char **strp,
+ int opindex,
+ long *valuep)
+{
+ const char *errmsg = NULL;
+
+ if (strncmp (*strp, "odd", 3) == 0 || strncmp (*strp, "ODD", 3) == 0)
+ {
+ *strp += 3;
+ *valuep = 0;
+ }
+ else if (strncmp (*strp, "even", 4) == 0 || strncmp (*strp, "EVEN", 4) == 0)
+ {
+ *strp += 4;
+ *valuep = 1;
+ }
+ else if (strncmp (*strp, "oe", 2) == 0 || strncmp (*strp, "OE", 2) == 0)
+ {
+ *strp += 2;
+ *valuep = 2;
+ }
+ else
+ errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
+
+ if ((errmsg == NULL) && (*valuep == 3))
+ errmsg = _("invalid operand. type may have values 0,1,2 only.");
+
+ return errmsg;
+}
+
+/* -- dis.c */
+static void print_dollarhex (CGEN_CPU_DESC, PTR, long, unsigned, bfd_vma, int);
+
+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, "$%x", value);
+
+ if (0)
+ print_normal (cd, dis_info, value, attrs, pc, length);
+}
+
+
+/* -- */
+
+
+
+
+
generated by cgit v1.1 at 2024-11-27 21:18:57 +0000