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-rw-r--r--binutils-2.17/gas/config/tc-crx.c2051
1 files changed, 0 insertions, 2051 deletions
diff --git a/binutils-2.17/gas/config/tc-crx.c b/binutils-2.17/gas/config/tc-crx.c
deleted file mode 100644
index 34448cd8..00000000
--- a/binutils-2.17/gas/config/tc-crx.c
+++ /dev/null
@@ -1,2051 +0,0 @@
-/* tc-crx.c -- Assembler code for the CRX CPU core.
- Copyright 2004 Free Software Foundation, Inc.
-
- Contributed by Tomer Levi, NSC, Israel.
- Originally written for GAS 2.12 by Tomer Levi, NSC, Israel.
- Updates, BFDizing, GNUifying and ELF support by Tomer Levi.
-
- This file is part of GAS, the GNU Assembler.
-
- GAS 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, or (at your option)
- any later version.
-
- GAS 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 GAS; see the file COPYING. If not, write to the
- Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston,
- MA 02110-1301, USA. */
-
-#include "as.h"
-#include "safe-ctype.h"
-#include "dwarf2dbg.h"
-#include "opcode/crx.h"
-#include "elf/crx.h"
-
-/* Word is considered here as a 16-bit unsigned short int. */
-#define WORD_SHIFT 16
-
-/* Register is 4-bit size. */
-#define REG_SIZE 4
-
-/* Maximum size of a single instruction (in words). */
-#define INSN_MAX_SIZE 3
-
-/* Maximum bits which may be set in a `mask16' operand. */
-#define MAX_REGS_IN_MASK16 8
-
-/* Utility macros for string comparison. */
-#define streq(a, b) (strcmp (a, b) == 0)
-#define strneq(a, b, c) (strncmp (a, b, c) == 0)
-
-/* Assign a number NUM, shifted by SHIFT bytes, into a location
- pointed by index BYTE of array 'output_opcode'. */
-#define CRX_PRINT(BYTE, NUM, SHIFT) output_opcode[BYTE] |= (NUM << SHIFT)
-
-/* Operand errors. */
-typedef enum
- {
- OP_LEGAL = 0, /* Legal operand. */
- OP_OUT_OF_RANGE, /* Operand not within permitted range. */
- OP_NOT_EVEN, /* Operand is Odd number, should be even. */
- OP_ILLEGAL_DISPU4, /* Operand is not within DISPU4 range. */
- OP_ILLEGAL_CST4, /* Operand is not within CST4 range. */
- OP_NOT_UPPER_64KB /* Operand is not within the upper 64KB
- (0xFFFF0000-0xFFFFFFFF). */
- }
-op_err;
-
-/* Opcode mnemonics hash table. */
-static struct hash_control *crx_inst_hash;
-/* CRX registers hash table. */
-static struct hash_control *reg_hash;
-/* CRX coprocessor registers hash table. */
-static struct hash_control *copreg_hash;
-/* Current instruction we're assembling. */
-const inst *instruction;
-
-/* Global variables. */
-
-/* Array to hold an instruction encoding. */
-long output_opcode[2];
-
-/* Nonzero means a relocatable symbol. */
-int relocatable;
-
-/* A copy of the original instruction (used in error messages). */
-char ins_parse[MAX_INST_LEN];
-
-/* The current processed argument number. */
-int cur_arg_num;
-
-/* Generic assembler global variables which must be defined by all targets. */
-
-/* Characters which always start a comment. */
-const char comment_chars[] = "#";
-
-/* Characters which start a comment at the beginning of a line. */
-const char line_comment_chars[] = "#";
-
-/* This array holds machine specific line separator characters. */
-const char line_separator_chars[] = ";";
-
-/* Chars that can be used to separate mant from exp in floating point nums. */
-const char EXP_CHARS[] = "eE";
-
-/* Chars that mean this number is a floating point constant as in 0f12.456 */
-const char FLT_CHARS[] = "f'";
-
-/* Target-specific multicharacter options, not const-declared at usage. */
-const char *md_shortopts = "";
-struct option md_longopts[] =
-{
- {NULL, no_argument, NULL, 0}
-};
-size_t md_longopts_size = sizeof (md_longopts);
-
-/* This table describes all the machine specific pseudo-ops
- the assembler has to support. The fields are:
- *** Pseudo-op name without dot.
- *** Function to call to execute this pseudo-op.
- *** Integer arg to pass to the function. */
-
-const pseudo_typeS md_pseudo_table[] =
-{
- /* In CRX machine, align is in bytes (not a ptwo boundary). */
- {"align", s_align_bytes, 0},
- {0, 0, 0}
-};
-
-/* CRX relaxation table. */
-const relax_typeS md_relax_table[] =
-{
- /* bCC */
- {0xfa, -0x100, 2, 1}, /* 8 */
- {0xfffe, -0x10000, 4, 2}, /* 16 */
- {0xfffffffe, -0xfffffffe, 6, 0}, /* 32 */
-
- /* bal */
- {0xfffe, -0x10000, 4, 4}, /* 16 */
- {0xfffffffe, -0xfffffffe, 6, 0}, /* 32 */
-
- /* cmpbr/bcop */
- {0xfe, -0x100, 4, 6}, /* 8 */
- {0xfffffe, -0x1000000, 6, 0} /* 24 */
-};
-
-static void reset_vars (char *);
-static reg get_register (char *);
-static copreg get_copregister (char *);
-static argtype get_optype (operand_type);
-static int get_opbits (operand_type);
-static int get_opflags (operand_type);
-static int get_number_of_operands (void);
-static void parse_operand (char *, ins *);
-static int gettrap (char *);
-static void handle_LoadStor (char *);
-static int get_cinv_parameters (char *);
-static long getconstant (long, int);
-static op_err check_range (long *, int, unsigned int, int);
-static int getreg_image (reg);
-static void parse_operands (ins *, char *);
-static void parse_insn (ins *, char *);
-static void print_operand (int, int, argument *);
-static void print_constant (int, int, argument *);
-static int exponent2scale (int);
-static void mask_reg (int, unsigned short *);
-static void process_label_constant (char *, ins *);
-static void set_operand (char *, ins *);
-static char * preprocess_reglist (char *, int *);
-static int assemble_insn (char *, ins *);
-static void print_insn (ins *);
-static void warn_if_needed (ins *);
-static int adjust_if_needed (ins *);
-
-/* Return the bit size for a given operand. */
-
-static int
-get_opbits (operand_type op)
-{
- if (op < MAX_OPRD)
- return crx_optab[op].bit_size;
- else
- return 0;
-}
-
-/* Return the argument type of a given operand. */
-
-static argtype
-get_optype (operand_type op)
-{
- if (op < MAX_OPRD)
- return crx_optab[op].arg_type;
- else
- return nullargs;
-}
-
-/* Return the flags of a given operand. */
-
-static int
-get_opflags (operand_type op)
-{
- if (op < MAX_OPRD)
- return crx_optab[op].flags;
- else
- return 0;
-}
-
-/* Get the core processor register 'reg_name'. */
-
-static reg
-get_register (char *reg_name)
-{
- const reg_entry *reg;
-
- reg = (const reg_entry *) hash_find (reg_hash, reg_name);
-
- if (reg != NULL)
- return reg->value.reg_val;
- else
- return nullregister;
-}
-
-/* Get the coprocessor register 'copreg_name'. */
-
-static copreg
-get_copregister (char *copreg_name)
-{
- const reg_entry *copreg;
-
- copreg = (const reg_entry *) hash_find (copreg_hash, copreg_name);
-
- if (copreg != NULL)
- return copreg->value.copreg_val;
- else
- return nullcopregister;
-}
-
-/* Round up a section size to the appropriate boundary. */
-
-valueT
-md_section_align (segT seg, valueT val)
-{
- /* Round .text section to a multiple of 2. */
- if (seg == text_section)
- return (val + 1) & ~1;
- return val;
-}
-
-/* Parse an operand that is machine-specific (remove '*'). */
-
-void
-md_operand (expressionS * exp)
-{
- char c = *input_line_pointer;
-
- switch (c)
- {
- case '*':
- input_line_pointer++;
- expression (exp);
- break;
- default:
- break;
- }
-}
-
-/* Reset global variables before parsing a new instruction. */
-
-static void
-reset_vars (char *op)
-{
- cur_arg_num = relocatable = 0;
- memset (& output_opcode, '\0', sizeof (output_opcode));
-
- /* Save a copy of the original OP (used in error messages). */
- strncpy (ins_parse, op, sizeof ins_parse - 1);
- ins_parse [sizeof ins_parse - 1] = 0;
-}
-
-/* This macro decides whether a particular reloc is an entry in a
- switch table. It is used when relaxing, because the linker needs
- to know about all such entries so that it can adjust them if
- necessary. */
-
-#define SWITCH_TABLE(fix) \
- ( (fix)->fx_addsy != NULL \
- && (fix)->fx_subsy != NULL \
- && S_GET_SEGMENT ((fix)->fx_addsy) == \
- S_GET_SEGMENT ((fix)->fx_subsy) \
- && S_GET_SEGMENT (fix->fx_addsy) != undefined_section \
- && ( (fix)->fx_r_type == BFD_RELOC_CRX_NUM8 \
- || (fix)->fx_r_type == BFD_RELOC_CRX_NUM16 \
- || (fix)->fx_r_type == BFD_RELOC_CRX_NUM32))
-
-/* See whether we need to force a relocation into the output file.
- This is used to force out switch and PC relative relocations when
- relaxing. */
-
-int
-crx_force_relocation (fixS *fix)
-{
- if (generic_force_reloc (fix) || SWITCH_TABLE (fix))
- return 1;
-
- return 0;
-}
-
-/* Generate a relocation entry for a fixup. */
-
-arelent *
-tc_gen_reloc (asection *section ATTRIBUTE_UNUSED, fixS * fixP)
-{
- arelent * reloc;
-
- reloc = xmalloc (sizeof (arelent));
- reloc->sym_ptr_ptr = xmalloc (sizeof (asymbol *));
- *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixP->fx_addsy);
- reloc->address = fixP->fx_frag->fr_address + fixP->fx_where;
- reloc->addend = fixP->fx_offset;
-
- if (fixP->fx_subsy != NULL)
- {
- if (SWITCH_TABLE (fixP))
- {
- /* Keep the current difference in the addend. */
- reloc->addend = (S_GET_VALUE (fixP->fx_addsy)
- - S_GET_VALUE (fixP->fx_subsy) + fixP->fx_offset);
-
- switch (fixP->fx_r_type)
- {
- case BFD_RELOC_CRX_NUM8:
- fixP->fx_r_type = BFD_RELOC_CRX_SWITCH8;
- break;
- case BFD_RELOC_CRX_NUM16:
- fixP->fx_r_type = BFD_RELOC_CRX_SWITCH16;
- break;
- case BFD_RELOC_CRX_NUM32:
- fixP->fx_r_type = BFD_RELOC_CRX_SWITCH32;
- break;
- default:
- abort ();
- break;
- }
- }
- else
- {
- /* We only resolve difference expressions in the same section. */
- as_bad_where (fixP->fx_file, fixP->fx_line,
- _("can't resolve `%s' {%s section} - `%s' {%s section}"),
- fixP->fx_addsy ? S_GET_NAME (fixP->fx_addsy) : "0",
- segment_name (fixP->fx_addsy
- ? S_GET_SEGMENT (fixP->fx_addsy)
- : absolute_section),
- S_GET_NAME (fixP->fx_subsy),
- segment_name (S_GET_SEGMENT (fixP->fx_addsy)));
- }
- }
-
- assert ((int) fixP->fx_r_type > 0);
- reloc->howto = bfd_reloc_type_lookup (stdoutput, fixP->fx_r_type);
-
- if (reloc->howto == (reloc_howto_type *) NULL)
- {
- as_bad_where (fixP->fx_file, fixP->fx_line,
- _("internal error: reloc %d (`%s') not supported by object file format"),
- fixP->fx_r_type,
- bfd_get_reloc_code_name (fixP->fx_r_type));
- return NULL;
- }
- assert (!fixP->fx_pcrel == !reloc->howto->pc_relative);
-
- return reloc;
-}
-
-/* Prepare machine-dependent frags for relaxation. */
-
-int
-md_estimate_size_before_relax (fragS *fragp, asection *seg)
-{
- /* If symbol is undefined or located in a different section,
- select the largest supported relocation. */
- relax_substateT subtype;
- relax_substateT rlx_state[] = {0, 2,
- 3, 4,
- 5, 6};
-
- for (subtype = 0; subtype < ARRAY_SIZE (rlx_state); subtype += 2)
- {
- if (fragp->fr_subtype == rlx_state[subtype]
- && (!S_IS_DEFINED (fragp->fr_symbol)
- || seg != S_GET_SEGMENT (fragp->fr_symbol)))
- {
- fragp->fr_subtype = rlx_state[subtype + 1];
- break;
- }
- }
-
- if (fragp->fr_subtype >= ARRAY_SIZE (md_relax_table))
- abort ();
-
- return md_relax_table[fragp->fr_subtype].rlx_length;
-}
-
-void
-md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, fragS *fragP)
-{
- /* 'opcode' points to the start of the instruction, whether
- we need to change the instruction's fixed encoding. */
- char *opcode = fragP->fr_literal + fragP->fr_fix;
- bfd_reloc_code_real_type reloc;
-
- subseg_change (sec, 0);
-
- switch (fragP->fr_subtype)
- {
- case 0:
- reloc = BFD_RELOC_CRX_REL8;
- break;
- case 1:
- *opcode = 0x7e;
- reloc = BFD_RELOC_CRX_REL16;
- break;
- case 2:
- *opcode = 0x7f;
- reloc = BFD_RELOC_CRX_REL32;
- break;
- case 3:
- reloc = BFD_RELOC_CRX_REL16;
- break;
- case 4:
- *++opcode = 0x31;
- reloc = BFD_RELOC_CRX_REL32;
- break;
- case 5:
- reloc = BFD_RELOC_CRX_REL8_CMP;
- break;
- case 6:
- *++opcode = 0x31;
- reloc = BFD_RELOC_CRX_REL24;
- break;
- default:
- abort ();
- break;
- }
-
- fix_new (fragP, fragP->fr_fix,
- bfd_get_reloc_size (bfd_reloc_type_lookup (stdoutput, reloc)),
- fragP->fr_symbol, fragP->fr_offset, 1, reloc);
- fragP->fr_var = 0;
- fragP->fr_fix += md_relax_table[fragP->fr_subtype].rlx_length;
-}
-
-/* Process machine-dependent command line options. Called once for
- each option on the command line that the machine-independent part of
- GAS does not understand. */
-
-int
-md_parse_option (int c ATTRIBUTE_UNUSED, char *arg ATTRIBUTE_UNUSED)
-{
- return 0;
-}
-
-/* Machine-dependent usage-output. */
-
-void
-md_show_usage (FILE *stream ATTRIBUTE_UNUSED)
-{
- return;
-}
-
-/* Turn a string in input_line_pointer into a floating point constant
- of type TYPE, and store the appropriate bytes in *LITP. The number
- of LITTLENUMS emitted is stored in *SIZEP. An error message is
- returned, or NULL on OK. */
-
-char *
-md_atof (int type, char *litP, int *sizeP)
-{
- int prec;
- LITTLENUM_TYPE words[4];
- char *t;
- int i;
-
- switch (type)
- {
- case 'f':
- prec = 2;
- break;
-
- case 'd':
- prec = 4;
- break;
-
- default:
- *sizeP = 0;
- return _("bad call to md_atof");
- }
-
- t = atof_ieee (input_line_pointer, type, words);
- if (t)
- input_line_pointer = t;
-
- *sizeP = prec * 2;
-
- if (! target_big_endian)
- {
- for (i = prec - 1; i >= 0; i--)
- {
- md_number_to_chars (litP, (valueT) words[i], 2);
- litP += 2;
- }
- }
- else
- {
- for (i = 0; i < prec; i++)
- {
- md_number_to_chars (litP, (valueT) words[i], 2);
- litP += 2;
- }
- }
-
- return NULL;
-}
-
-/* Apply a fixS (fixup of an instruction or data that we didn't have
- enough info to complete immediately) to the data in a frag.
- Since linkrelax is nonzero and TC_LINKRELAX_FIXUP is defined to disable
- relaxation of debug sections, this function is called only when
- fixuping relocations of debug sections. */
-
-void
-md_apply_fix (fixS *fixP, valueT *valP, segT seg)
-{
- valueT val = * valP;
- char *buf = fixP->fx_frag->fr_literal + fixP->fx_where;
- fixP->fx_offset = 0;
-
- switch (fixP->fx_r_type)
- {
- case BFD_RELOC_CRX_NUM8:
- bfd_put_8 (stdoutput, (unsigned char) val, buf);
- break;
- case BFD_RELOC_CRX_NUM16:
- bfd_put_16 (stdoutput, val, buf);
- break;
- case BFD_RELOC_CRX_NUM32:
- bfd_put_32 (stdoutput, val, buf);
- break;
- default:
- /* We shouldn't ever get here because linkrelax is nonzero. */
- abort ();
- break;
- }
-
- fixP->fx_done = 0;
-
- if (fixP->fx_addsy == NULL
- && fixP->fx_pcrel == 0)
- fixP->fx_done = 1;
-
- if (fixP->fx_pcrel == 1
- && fixP->fx_addsy != NULL
- && S_GET_SEGMENT (fixP->fx_addsy) == seg)
- fixP->fx_done = 1;
-}
-
-/* The location from which a PC relative jump should be calculated,
- given a PC relative reloc. */
-
-long
-md_pcrel_from (fixS *fixp)
-{
- return fixp->fx_frag->fr_address + fixp->fx_where;
-}
-
-/* This function is called once, at assembler startup time. This should
- set up all the tables, etc that the MD part of the assembler needs. */
-
-void
-md_begin (void)
-{
- const char *hashret = NULL;
- int i = 0;
-
- /* Set up a hash table for the instructions. */
- if ((crx_inst_hash = hash_new ()) == NULL)
- as_fatal (_("Virtual memory exhausted"));
-
- while (crx_instruction[i].mnemonic != NULL)
- {
- const char *mnemonic = crx_instruction[i].mnemonic;
-
- hashret = hash_insert (crx_inst_hash, mnemonic,
- (PTR) &crx_instruction[i]);
-
- if (hashret != NULL && *hashret != '\0')
- as_fatal (_("Can't hash `%s': %s\n"), crx_instruction[i].mnemonic,
- *hashret == 0 ? _("(unknown reason)") : hashret);
-
- /* Insert unique names into hash table. The CRX instruction set
- has many identical opcode names that have different opcodes based
- on the operands. This hash table then provides a quick index to
- the first opcode with a particular name in the opcode table. */
- do
- {
- ++i;
- }
- while (crx_instruction[i].mnemonic != NULL
- && streq (crx_instruction[i].mnemonic, mnemonic));
- }
-
- /* Initialize reg_hash hash table. */
- if ((reg_hash = hash_new ()) == NULL)
- as_fatal (_("Virtual memory exhausted"));
-
- {
- const reg_entry *regtab;
-
- for (regtab = crx_regtab;
- regtab < (crx_regtab + NUMREGS); regtab++)
- {
- hashret = hash_insert (reg_hash, regtab->name, (PTR) regtab);
- if (hashret)
- as_fatal (_("Internal Error: Can't hash %s: %s"),
- regtab->name,
- hashret);
- }
- }
-
- /* Initialize copreg_hash hash table. */
- if ((copreg_hash = hash_new ()) == NULL)
- as_fatal (_("Virtual memory exhausted"));
-
- {
- const reg_entry *copregtab;
-
- for (copregtab = crx_copregtab; copregtab < (crx_copregtab + NUMCOPREGS);
- copregtab++)
- {
- hashret = hash_insert (copreg_hash, copregtab->name, (PTR) copregtab);
- if (hashret)
- as_fatal (_("Internal Error: Can't hash %s: %s"),
- copregtab->name,
- hashret);
- }
- }
- /* Set linkrelax here to avoid fixups in most sections. */
- linkrelax = 1;
-}
-
-/* Process constants (immediate/absolute)
- and labels (jump targets/Memory locations). */
-
-static void
-process_label_constant (char *str, ins * crx_ins)
-{
- char *saved_input_line_pointer;
- argument *cur_arg = &crx_ins->arg[cur_arg_num]; /* Current argument. */
-
- saved_input_line_pointer = input_line_pointer;
- input_line_pointer = str;
-
- expression (&crx_ins->exp);
-
- switch (crx_ins->exp.X_op)
- {
- case O_big:
- case O_absent:
- /* Missing or bad expr becomes absolute 0. */
- as_bad (_("missing or invalid displacement expression `%s' taken as 0"),
- str);
- crx_ins->exp.X_op = O_constant;
- crx_ins->exp.X_add_number = 0;
- crx_ins->exp.X_add_symbol = (symbolS *) 0;
- crx_ins->exp.X_op_symbol = (symbolS *) 0;
- /* Fall through. */
-
- case O_constant:
- cur_arg->X_op = O_constant;
- cur_arg->constant = crx_ins->exp.X_add_number;
- break;
-
- case O_symbol:
- case O_subtract:
- case O_add:
- cur_arg->X_op = O_symbol;
- crx_ins->rtype = BFD_RELOC_NONE;
- relocatable = 1;
-
- switch (cur_arg->type)
- {
- case arg_cr:
- if (IS_INSN_TYPE (LD_STOR_INS_INC))
- crx_ins->rtype = BFD_RELOC_CRX_REGREL12;
- else if (IS_INSN_TYPE (CSTBIT_INS)
- || IS_INSN_TYPE (STOR_IMM_INS))
- crx_ins->rtype = BFD_RELOC_CRX_REGREL28;
- else
- crx_ins->rtype = BFD_RELOC_CRX_REGREL32;
- break;
-
- case arg_idxr:
- crx_ins->rtype = BFD_RELOC_CRX_REGREL22;
- break;
-
- case arg_c:
- if (IS_INSN_MNEMONIC ("bal") || IS_INSN_TYPE (DCR_BRANCH_INS))
- crx_ins->rtype = BFD_RELOC_CRX_REL16;
- else if (IS_INSN_TYPE (BRANCH_INS))
- crx_ins->rtype = BFD_RELOC_CRX_REL8;
- else if (IS_INSN_TYPE (LD_STOR_INS) || IS_INSN_TYPE (STOR_IMM_INS)
- || IS_INSN_TYPE (CSTBIT_INS))
- crx_ins->rtype = BFD_RELOC_CRX_ABS32;
- else if (IS_INSN_TYPE (BRANCH_NEQ_INS))
- crx_ins->rtype = BFD_RELOC_CRX_REL4;
- else if (IS_INSN_TYPE (CMPBR_INS) || IS_INSN_TYPE (COP_BRANCH_INS))
- crx_ins->rtype = BFD_RELOC_CRX_REL8_CMP;
- break;
-
- case arg_ic:
- if (IS_INSN_TYPE (ARITH_INS))
- crx_ins->rtype = BFD_RELOC_CRX_IMM32;
- else if (IS_INSN_TYPE (ARITH_BYTE_INS))
- crx_ins->rtype = BFD_RELOC_CRX_IMM16;
- break;
- default:
- break;
- }
- break;
-
- default:
- cur_arg->X_op = crx_ins->exp.X_op;
- break;
- }
-
- input_line_pointer = saved_input_line_pointer;
- return;
-}
-
-/* Get the values of the scale to be encoded -
- used for the scaled index mode of addressing. */
-
-static int
-exponent2scale (int val)
-{
- int exponent;
-
- /* If 'val' is 0, the following 'for' will be an endless loop. */
- if (val == 0)
- return 0;
-
- for (exponent = 0; (val != 1); val >>= 1, exponent++)
- ;
-
- return exponent;
-}
-
-/* Parsing different types of operands
- -> constants Immediate/Absolute/Relative numbers
- -> Labels Relocatable symbols
- -> (rbase) Register base
- -> disp(rbase) Register relative
- -> disp(rbase)+ Post-increment mode
- -> disp(rbase,ridx,scl) Register index mode */
-
-static void
-set_operand (char *operand, ins * crx_ins)
-{
- char *operandS; /* Pointer to start of sub-opearand. */
- char *operandE; /* Pointer to end of sub-opearand. */
- expressionS scale;
- int scale_val;
- char *input_save, c;
- argument *cur_arg = &crx_ins->arg[cur_arg_num]; /* Current argument. */
-
- /* Initialize pointers. */
- operandS = operandE = operand;
-
- switch (cur_arg->type)
- {
- case arg_sc: /* Case *+0x18. */
- case arg_ic: /* Case $0x18. */
- operandS++;
- case arg_c: /* Case 0x18. */
- /* Set constant. */
- process_label_constant (operandS, crx_ins);
-
- if (cur_arg->type != arg_ic)
- cur_arg->type = arg_c;
- break;
-
- case arg_icr: /* Case $0x18(r1). */
- operandS++;
- case arg_cr: /* Case 0x18(r1). */
- /* Set displacement constant. */
- while (*operandE != '(')
- operandE++;
- *operandE = '\0';
- process_label_constant (operandS, crx_ins);
- operandS = operandE;
- case arg_rbase: /* Case (r1). */
- operandS++;
- /* Set register base. */
- while (*operandE != ')')
- operandE++;
- *operandE = '\0';
- if ((cur_arg->r = get_register (operandS)) == nullregister)
- as_bad (_("Illegal register `%s' in Instruction `%s'"),
- operandS, ins_parse);
-
- if (cur_arg->type != arg_rbase)
- cur_arg->type = arg_cr;
- break;
-
- case arg_idxr:
- /* Set displacement constant. */
- while (*operandE != '(')
- operandE++;
- *operandE = '\0';
- process_label_constant (operandS, crx_ins);
- operandS = ++operandE;
-
- /* Set register base. */
- while ((*operandE != ',') && (! ISSPACE (*operandE)))
- operandE++;
- *operandE++ = '\0';
- if ((cur_arg->r = get_register (operandS)) == nullregister)
- as_bad (_("Illegal register `%s' in Instruction `%s'"),
- operandS, ins_parse);
-
- /* Skip leading white space. */
- while (ISSPACE (*operandE))
- operandE++;
- operandS = operandE;
-
- /* Set register index. */
- while ((*operandE != ')') && (*operandE != ','))
- operandE++;
- c = *operandE;
- *operandE++ = '\0';
-
- if ((cur_arg->i_r = get_register (operandS)) == nullregister)
- as_bad (_("Illegal register `%s' in Instruction `%s'"),
- operandS, ins_parse);
-
- /* Skip leading white space. */
- while (ISSPACE (*operandE))
- operandE++;
- operandS = operandE;
-
- /* Set the scale. */
- if (c == ')')
- cur_arg->scale = 0;
- else
- {
- while (*operandE != ')')
- operandE++;
- *operandE = '\0';
-
- /* Preprocess the scale string. */
- input_save = input_line_pointer;
- input_line_pointer = operandS;
- expression (&scale);
- input_line_pointer = input_save;
-
- scale_val = scale.X_add_number;
-
- /* Check if the scale value is legal. */
- if (scale_val != 1 && scale_val != 2
- && scale_val != 4 && scale_val != 8)
- as_bad (_("Illegal Scale - `%d'"), scale_val);
-
- cur_arg->scale = exponent2scale (scale_val);
- }
- break;
-
- default:
- break;
- }
-}
-
-/* Parse a single operand.
- operand - Current operand to parse.
- crx_ins - Current assembled instruction. */
-
-static void
-parse_operand (char *operand, ins * crx_ins)
-{
- int ret_val;
- argument *cur_arg = &crx_ins->arg[cur_arg_num]; /* Current argument. */
-
- /* Initialize the type to NULL before parsing. */
- cur_arg->type = nullargs;
-
- /* Check whether this is a general processor register. */
- if ((ret_val = get_register (operand)) != nullregister)
- {
- cur_arg->type = arg_r;
- cur_arg->r = ret_val;
- cur_arg->X_op = O_register;
- return;
- }
-
- /* Check whether this is a core [special] coprocessor register. */
- if ((ret_val = get_copregister (operand)) != nullcopregister)
- {
- cur_arg->type = arg_copr;
- if (ret_val >= cs0)
- cur_arg->type = arg_copsr;
- cur_arg->cr = ret_val;
- cur_arg->X_op = O_register;
- return;
- }
-
- /* Deal with special characters. */
- switch (operand[0])
- {
- case '$':
- if (strchr (operand, '(') != NULL)
- cur_arg->type = arg_icr;
- else
- cur_arg->type = arg_ic;
- goto set_params;
- break;
-
- case '*':
- cur_arg->type = arg_sc;
- goto set_params;
- break;
-
- case '(':
- cur_arg->type = arg_rbase;
- goto set_params;
- break;
-
- default:
- break;
- }
-
- if (strchr (operand, '(') != NULL)
- {
- if (strchr (operand, ',') != NULL
- && (strchr (operand, ',') > strchr (operand, '(')))
- cur_arg->type = arg_idxr;
- else
- cur_arg->type = arg_cr;
- }
- else
- cur_arg->type = arg_c;
- goto set_params;
-
-/* Parse an operand according to its type. */
-set_params:
- cur_arg->constant = 0;
- set_operand (operand, crx_ins);
-}
-
-/* Parse the various operands. Each operand is then analyzed to fillup
- the fields in the crx_ins data structure. */
-
-static void
-parse_operands (ins * crx_ins, char *operands)
-{
- char *operandS; /* Operands string. */
- char *operandH, *operandT; /* Single operand head/tail pointers. */
- int allocated = 0; /* Indicates a new operands string was allocated. */
- char *operand[MAX_OPERANDS]; /* Separating the operands. */
- int op_num = 0; /* Current operand number we are parsing. */
- int bracket_flag = 0; /* Indicates a bracket '(' was found. */
- int sq_bracket_flag = 0; /* Indicates a square bracket '[' was found. */
-
- /* Preprocess the list of registers, if necessary. */
- operandS = operandH = operandT = (INST_HAS_REG_LIST) ?
- preprocess_reglist (operands, &allocated) : operands;
-
- while (*operandT != '\0')
- {
- if (*operandT == ',' && bracket_flag != 1 && sq_bracket_flag != 1)
- {
- *operandT++ = '\0';
- operand[op_num++] = strdup (operandH);
- operandH = operandT;
- continue;
- }
-
- if (*operandT == ' ')
- as_bad (_("Illegal operands (whitespace): `%s'"), ins_parse);
-
- if (*operandT == '(')
- bracket_flag = 1;
- else if (*operandT == '[')
- sq_bracket_flag = 1;
-
- if (*operandT == ')')
- {
- if (bracket_flag)
- bracket_flag = 0;
- else
- as_fatal (_("Missing matching brackets : `%s'"), ins_parse);
- }
- else if (*operandT == ']')
- {
- if (sq_bracket_flag)
- sq_bracket_flag = 0;
- else
- as_fatal (_("Missing matching brackets : `%s'"), ins_parse);
- }
-
- if (bracket_flag == 1 && *operandT == ')')
- bracket_flag = 0;
- else if (sq_bracket_flag == 1 && *operandT == ']')
- sq_bracket_flag = 0;
-
- operandT++;
- }
-
- /* Adding the last operand. */
- operand[op_num++] = strdup (operandH);
- crx_ins->nargs = op_num;
-
- /* Verifying correct syntax of operands (all brackets should be closed). */
- if (bracket_flag || sq_bracket_flag)
- as_fatal (_("Missing matching brackets : `%s'"), ins_parse);
-
- /* Now we parse each operand separately. */
- for (op_num = 0; op_num < crx_ins->nargs; op_num++)
- {
- cur_arg_num = op_num;
- parse_operand (operand[op_num], crx_ins);
- free (operand[op_num]);
- }
-
- if (allocated)
- free (operandS);
-}
-
-/* Get the trap index in dispatch table, given its name.
- This routine is used by assembling the 'excp' instruction. */
-
-static int
-gettrap (char *s)
-{
- const trap_entry *trap;
-
- for (trap = crx_traps; trap < (crx_traps + NUMTRAPS); trap++)
- if (strcasecmp (trap->name, s) == 0)
- return trap->entry;
-
- as_bad (_("Unknown exception: `%s'"), s);
- return 0;
-}
-
-/* Post-Increment instructions, as well as Store-Immediate instructions, are a
- sub-group within load/stor instruction groups.
- Therefore, when parsing a Post-Increment/Store-Immediate insn, we have to
- advance the instruction pointer to the start of that sub-group (that is, up
- to the first instruction of that type).
- Otherwise, the insn will be mistakenly identified as of type LD_STOR_INS. */
-
-static void
-handle_LoadStor (char *operands)
-{
- /* Post-Increment instructions precede Store-Immediate instructions in
- CRX instruction table, hence they are handled before.
- This synchronization should be kept. */
-
- /* Assuming Post-Increment insn has the following format :
- 'MNEMONIC DISP(REG)+, REG' (e.g. 'loadw 12(r5)+, r6').
- LD_STOR_INS_INC are the only store insns containing a plus sign (+). */
- if (strstr (operands, ")+") != NULL)
- {
- while (! IS_INSN_TYPE (LD_STOR_INS_INC))
- instruction++;
- return;
- }
-
- /* Assuming Store-Immediate insn has the following format :
- 'MNEMONIC $DISP, ...' (e.g. 'storb $1, 12(r5)').
- STOR_IMM_INS are the only store insns containing a dollar sign ($). */
- if (strstr (operands, "$") != NULL)
- while (! IS_INSN_TYPE (STOR_IMM_INS))
- instruction++;
-}
-
-/* Top level module where instruction parsing starts.
- crx_ins - data structure holds some information.
- operands - holds the operands part of the whole instruction. */
-
-static void
-parse_insn (ins *insn, char *operands)
-{
- int i;
-
- /* Handle instructions with no operands. */
- for (i = 0; no_op_insn[i] != NULL; i++)
- {
- if (streq (no_op_insn[i], instruction->mnemonic))
- {
- insn->nargs = 0;
- return;
- }
- }
-
- /* Handle 'excp'/'cinv' instructions. */
- if (IS_INSN_MNEMONIC ("excp") || IS_INSN_MNEMONIC ("cinv"))
- {
- insn->nargs = 1;
- insn->arg[0].type = arg_ic;
- insn->arg[0].constant = IS_INSN_MNEMONIC ("excp") ?
- gettrap (operands) : get_cinv_parameters (operands);
- insn->arg[0].X_op = O_constant;
- return;
- }
-
- /* Handle load/stor unique instructions before parsing. */
- if (IS_INSN_TYPE (LD_STOR_INS))
- handle_LoadStor (operands);
-
- if (operands != NULL)
- parse_operands (insn, operands);
-}
-
-/* Cinv instruction requires special handling. */
-
-static int
-get_cinv_parameters (char * operand)
-{
- char *p = operand;
- int d_used = 0, i_used = 0, u_used = 0, b_used = 0;
-
- while (*++p != ']')
- {
- if (*p == ',' || *p == ' ')
- continue;
-
- if (*p == 'd')
- d_used = 1;
- else if (*p == 'i')
- i_used = 1;
- else if (*p == 'u')
- u_used = 1;
- else if (*p == 'b')
- b_used = 1;
- else
- as_bad (_("Illegal `cinv' parameter: `%c'"), *p);
- }
-
- return ((b_used ? 8 : 0)
- + (d_used ? 4 : 0)
- + (i_used ? 2 : 0)
- + (u_used ? 1 : 0));
-}
-
-/* Retrieve the opcode image of a given register.
- If the register is illegal for the current instruction,
- issue an error. */
-
-static int
-getreg_image (reg r)
-{
- const reg_entry *reg;
- char *reg_name;
- int is_procreg = 0; /* Nonzero means argument should be processor reg. */
-
- if (((IS_INSN_MNEMONIC ("mtpr")) && (cur_arg_num == 1))
- || ((IS_INSN_MNEMONIC ("mfpr")) && (cur_arg_num == 0)) )
- is_procreg = 1;
-
- /* Check whether the register is in registers table. */
- if (r < MAX_REG)
- reg = &crx_regtab[r];
- /* Check whether the register is in coprocessor registers table. */
- else if (r < MAX_COPREG)
- reg = &crx_copregtab[r-MAX_REG];
- /* Register not found. */
- else
- {
- as_bad (_("Unknown register: `%d'"), r);
- return 0;
- }
-
- reg_name = reg->name;
-
-/* Issue a error message when register is illegal. */
-#define IMAGE_ERR \
- as_bad (_("Illegal register (`%s') in Instruction: `%s'"), \
- reg_name, ins_parse); \
- break;
-
- switch (reg->type)
- {
- case CRX_U_REGTYPE:
- if (is_procreg || (instruction->flags & USER_REG))
- return reg->image;
- else
- IMAGE_ERR;
-
- case CRX_CFG_REGTYPE:
- if (is_procreg)
- return reg->image;
- else
- IMAGE_ERR;
-
- case CRX_R_REGTYPE:
- if (! is_procreg)
- return reg->image;
- else
- IMAGE_ERR;
-
- case CRX_C_REGTYPE:
- case CRX_CS_REGTYPE:
- return reg->image;
- break;
-
- default:
- IMAGE_ERR;
- }
-
- return 0;
-}
-
-/* Routine used to represent integer X using NBITS bits. */
-
-static long
-getconstant (long x, int nbits)
-{
- /* The following expression avoids overflow if
- 'nbits' is the number of bits in 'bfd_vma'. */
- return (x & ((((1 << (nbits - 1)) - 1) << 1) | 1));
-}
-
-/* Print a constant value to 'output_opcode':
- ARG holds the operand's type and value.
- SHIFT represents the location of the operand to be print into.
- NBITS determines the size (in bits) of the constant. */
-
-static void
-print_constant (int nbits, int shift, argument *arg)
-{
- unsigned long mask = 0;
-
- long constant = getconstant (arg->constant, nbits);
-
- switch (nbits)
- {
- case 32:
- case 28:
- case 24:
- case 22:
- /* mask the upper part of the constant, that is, the bits
- going to the lowest byte of output_opcode[0].
- The upper part of output_opcode[1] is always filled,
- therefore it is always masked with 0xFFFF. */
- mask = (1 << (nbits - 16)) - 1;
- /* Divide the constant between two consecutive words :
- 0 1 2 3
- +---------+---------+---------+---------+
- | | X X X X | X X X X | |
- +---------+---------+---------+---------+
- output_opcode[0] output_opcode[1] */
-
- CRX_PRINT (0, (constant >> WORD_SHIFT) & mask, 0);
- CRX_PRINT (1, (constant & 0xFFFF), WORD_SHIFT);
- break;
-
- case 16:
- case 12:
- /* Special case - in arg_cr, the SHIFT represents the location
- of the REGISTER, not the constant, which is itself not shifted. */
- if (arg->type == arg_cr)
- {
- CRX_PRINT (0, constant, 0);
- break;
- }
-
- /* When instruction size is 3 and 'shift' is 16, a 16-bit constant is
- always filling the upper part of output_opcode[1]. If we mistakenly
- write it to output_opcode[0], the constant prefix (that is, 'match')
- will be overriden.
- 0 1 2 3
- +---------+---------+---------+---------+
- | 'match' | | X X X X | |
- +---------+---------+---------+---------+
- output_opcode[0] output_opcode[1] */
-
- if ((instruction->size > 2) && (shift == WORD_SHIFT))
- CRX_PRINT (1, constant, WORD_SHIFT);
- else
- CRX_PRINT (0, constant, shift);
- break;
-
- default:
- CRX_PRINT (0, constant, shift);
- break;
- }
-}
-
-/* Print an operand to 'output_opcode', which later on will be
- printed to the object file:
- ARG holds the operand's type, size and value.
- SHIFT represents the printing location of operand.
- NBITS determines the size (in bits) of a constant operand. */
-
-static void
-print_operand (int nbits, int shift, argument *arg)
-{
- switch (arg->type)
- {
- case arg_r:
- CRX_PRINT (0, getreg_image (arg->r), shift);
- break;
-
- case arg_copr:
- if (arg->cr < c0 || arg->cr > c15)
- as_bad (_("Illegal Co-processor register in Instruction `%s' "),
- ins_parse);
- CRX_PRINT (0, getreg_image (arg->cr), shift);
- break;
-
- case arg_copsr:
- if (arg->cr < cs0 || arg->cr > cs15)
- as_bad (_("Illegal Co-processor special register in Instruction `%s' "),
- ins_parse);
- CRX_PRINT (0, getreg_image (arg->cr), shift);
- break;
-
- case arg_idxr:
- /* 16 12 8 6 0
- +--------------------------------+
- | r_base | r_idx | scl| disp |
- +--------------------------------+ */
- CRX_PRINT (0, getreg_image (arg->r), 12);
- CRX_PRINT (0, getreg_image (arg->i_r), 8);
- CRX_PRINT (0, arg->scale, 6);
- case arg_ic:
- case arg_c:
- print_constant (nbits, shift, arg);
- break;
-
- case arg_rbase:
- CRX_PRINT (0, getreg_image (arg->r), shift);
- break;
-
- case arg_cr:
- /* case base_cst4. */
- if (instruction->flags & DISPU4MAP)
- print_constant (nbits, shift + REG_SIZE, arg);
- else
- /* rbase_disps<NN> and other such cases. */
- print_constant (nbits, shift, arg);
- /* Add the register argument to the output_opcode. */
- CRX_PRINT (0, getreg_image (arg->r), shift);
- break;
-
- default:
- break;
- }
-}
-
-/* Retrieve the number of operands for the current assembled instruction. */
-
-static int
-get_number_of_operands (void)
-{
- int i;
-
- for (i = 0; instruction->operands[i].op_type && i < MAX_OPERANDS; i++)
- ;
- return i;
-}
-
-/* Verify that the number NUM can be represented in BITS bits (that is,
- within its permitted range), based on the instruction's FLAGS.
- If UPDATE is nonzero, update the value of NUM if necessary.
- Return OP_LEGAL upon success, actual error type upon failure. */
-
-static op_err
-check_range (long *num, int bits, int unsigned flags, int update)
-{
- long min, max;
- int retval = OP_LEGAL;
- int bin;
- long upper_64kb = 0xFFFF0000;
- long value = *num;
-
- /* For hosts witah longs bigger than 32-bits make sure that the top
- bits of a 32-bit negative value read in by the parser are set,
- so that the correct comparisons are made. */
- if (value & 0x80000000)
- value |= (-1L << 31);
-
- /* Verify operand value is even. */
- if (flags & OP_EVEN)
- {
- if (value % 2)
- return OP_NOT_EVEN;
- }
-
- if (flags & OP_UPPER_64KB)
- {
- /* Check if value is to be mapped to upper 64 KB memory area. */
- if ((value & upper_64kb) == upper_64kb)
- {
- value -= upper_64kb;
- if (update)
- *num = value;
- }
- else
- return OP_NOT_UPPER_64KB;
- }
-
- if (flags & OP_SHIFT)
- {
- value >>= 1;
- if (update)
- *num = value;
- }
- else if (flags & OP_SHIFT_DEC)
- {
- value = (value >> 1) - 1;
- if (update)
- *num = value;
- }
-
- if (flags & OP_ESC)
- {
- /* 0x7e and 0x7f are reserved escape sequences of dispe9. */
- if (value == 0x7e || value == 0x7f)
- return OP_OUT_OF_RANGE;
- }
-
- if (flags & OP_DISPU4)
- {
- int is_dispu4 = 0;
-
- int mul = (instruction->flags & DISPUB4) ? 1
- : (instruction->flags & DISPUW4) ? 2
- : (instruction->flags & DISPUD4) ? 4 : 0;
-
- for (bin = 0; bin < cst4_maps; bin++)
- {
- if (value == (mul * bin))
- {
- is_dispu4 = 1;
- if (update)
- *num = bin;
- break;
- }
- }
- if (!is_dispu4)
- retval = OP_ILLEGAL_DISPU4;
- }
- else if (flags & OP_CST4)
- {
- int is_cst4 = 0;
-
- for (bin = 0; bin < cst4_maps; bin++)
- {
- if (value == cst4_map[bin])
- {
- is_cst4 = 1;
- if (update)
- *num = bin;
- break;
- }
- }
- if (!is_cst4)
- retval = OP_ILLEGAL_CST4;
- }
- else if (flags & OP_SIGNED)
- {
- max = (1 << (bits - 1)) - 1;
- min = - (1 << (bits - 1));
- if ((value > max) || (value < min))
- retval = OP_OUT_OF_RANGE;
- }
- else if (flags & OP_UNSIGNED)
- {
- max = ((((1 << (bits - 1)) - 1) << 1) | 1);
- min = 0;
- if (((unsigned long) value > (unsigned long) max)
- || ((unsigned long) value < (unsigned long) min))
- retval = OP_OUT_OF_RANGE;
- }
- return retval;
-}
-
-/* Assemble a single instruction:
- INSN is already parsed (that is, all operand values and types are set).
- For instruction to be assembled, we need to find an appropriate template in
- the instruction table, meeting the following conditions:
- 1: Has the same number of operands.
- 2: Has the same operand types.
- 3: Each operand size is sufficient to represent the instruction's values.
- Returns 1 upon success, 0 upon failure. */
-
-static int
-assemble_insn (char *mnemonic, ins *insn)
-{
- /* Type of each operand in the current template. */
- argtype cur_type[MAX_OPERANDS];
- /* Size (in bits) of each operand in the current template. */
- unsigned int cur_size[MAX_OPERANDS];
- /* Flags of each operand in the current template. */
- unsigned int cur_flags[MAX_OPERANDS];
- /* Instruction type to match. */
- unsigned int ins_type;
- /* Boolean flag to mark whether a match was found. */
- int match = 0;
- int i;
- /* Nonzero if an instruction with same number of operands was found. */
- int found_same_number_of_operands = 0;
- /* Nonzero if an instruction with same argument types was found. */
- int found_same_argument_types = 0;
- /* Nonzero if a constant was found within the required range. */
- int found_const_within_range = 0;
- /* Argument number of an operand with invalid type. */
- int invalid_optype = -1;
- /* Argument number of an operand with invalid constant value. */
- int invalid_const = -1;
- /* Operand error (used for issuing various constant error messages). */
- op_err op_error, const_err = OP_LEGAL;
-
-/* Retrieve data (based on FUNC) for each operand of a given instruction. */
-#define GET_CURRENT_DATA(FUNC, ARRAY) \
- for (i = 0; i < insn->nargs; i++) \
- ARRAY[i] = FUNC (instruction->operands[i].op_type)
-
-#define GET_CURRENT_TYPE GET_CURRENT_DATA(get_optype, cur_type)
-#define GET_CURRENT_SIZE GET_CURRENT_DATA(get_opbits, cur_size)
-#define GET_CURRENT_FLAGS GET_CURRENT_DATA(get_opflags, cur_flags)
-
- /* Instruction has no operands -> only copy the constant opcode. */
- if (insn->nargs == 0)
- {
- output_opcode[0] = BIN (instruction->match, instruction->match_bits);
- return 1;
- }
-
- /* In some case, same mnemonic can appear with different instruction types.
- For example, 'storb' is supported with 3 different types :
- LD_STOR_INS, LD_STOR_INS_INC, STOR_IMM_INS.
- We assume that when reaching this point, the instruction type was
- pre-determined. We need to make sure that the type stays the same
- during a search for matching instruction. */
- ins_type = CRX_INS_TYPE(instruction->flags);
-
- while (/* Check that match is still not found. */
- match != 1
- /* Check we didn't get to end of table. */
- && instruction->mnemonic != NULL
- /* Check that the actual mnemonic is still available. */
- && IS_INSN_MNEMONIC (mnemonic)
- /* Check that the instruction type wasn't changed. */
- && IS_INSN_TYPE(ins_type))
- {
- /* Check whether number of arguments is legal. */
- if (get_number_of_operands () != insn->nargs)
- goto next_insn;
- found_same_number_of_operands = 1;
-
- /* Initialize arrays with data of each operand in current template. */
- GET_CURRENT_TYPE;
- GET_CURRENT_SIZE;
- GET_CURRENT_FLAGS;
-
- /* Check for type compatibility. */
- for (i = 0; i < insn->nargs; i++)
- {
- if (cur_type[i] != insn->arg[i].type)
- {
- if (invalid_optype == -1)
- invalid_optype = i + 1;
- goto next_insn;
- }
- }
- found_same_argument_types = 1;
-
- for (i = 0; i < insn->nargs; i++)
- {
- /* Reverse the operand indices for certain opcodes:
- Index 0 -->> 1
- Index 1 -->> 0
- Other index -->> stays the same. */
- int j = instruction->flags & REVERSE_MATCH ?
- i == 0 ? 1 :
- i == 1 ? 0 : i :
- i;
-
- /* Only check range - don't update the constant's value, since the
- current instruction may not be the last we try to match.
- The constant's value will be updated later, right before printing
- it to the object file. */
- if ((insn->arg[j].X_op == O_constant)
- && (op_error = check_range (&insn->arg[j].constant, cur_size[j],
- cur_flags[j], 0)))
- {
- if (invalid_const == -1)
- {
- invalid_const = j + 1;
- const_err = op_error;
- }
- goto next_insn;
- }
- /* For symbols, we make sure the relocation size (which was already
- determined) is sufficient. */
- else if ((insn->arg[j].X_op == O_symbol)
- && ((bfd_reloc_type_lookup (stdoutput, insn->rtype))->bitsize
- > cur_size[j]))
- goto next_insn;
- }
- found_const_within_range = 1;
-
- /* If we got till here -> Full match is found. */
- match = 1;
- break;
-
-/* Try again with next instruction. */
-next_insn:
- instruction++;
- }
-
- if (!match)
- {
- /* We haven't found a match - instruction can't be assembled. */
- if (!found_same_number_of_operands)
- as_bad (_("Incorrect number of operands"));
- else if (!found_same_argument_types)
- as_bad (_("Illegal type of operand (arg %d)"), invalid_optype);
- else if (!found_const_within_range)
- {
- switch (const_err)
- {
- case OP_OUT_OF_RANGE:
- as_bad (_("Operand out of range (arg %d)"), invalid_const);
- break;
- case OP_NOT_EVEN:
- as_bad (_("Operand has odd displacement (arg %d)"), invalid_const);
- break;
- case OP_ILLEGAL_DISPU4:
- as_bad (_("Invalid DISPU4 operand value (arg %d)"), invalid_const);
- break;
- case OP_ILLEGAL_CST4:
- as_bad (_("Invalid CST4 operand value (arg %d)"), invalid_const);
- break;
- case OP_NOT_UPPER_64KB:
- as_bad (_("Operand value is not within upper 64 KB (arg %d)"),
- invalid_const);
- break;
- default:
- as_bad (_("Illegal operand (arg %d)"), invalid_const);
- break;
- }
- }
-
- return 0;
- }
- else
- /* Full match - print the encoding to output file. */
- {
- /* Make further checkings (such that couldn't be made earlier).
- Warn the user if necessary. */
- warn_if_needed (insn);
-
- /* Check whether we need to adjust the instruction pointer. */
- if (adjust_if_needed (insn))
- /* If instruction pointer was adjusted, we need to update
- the size of the current template operands. */
- GET_CURRENT_SIZE;
-
- for (i = 0; i < insn->nargs; i++)
- {
- int j = instruction->flags & REVERSE_MATCH ?
- i == 0 ? 1 :
- i == 1 ? 0 : i :
- i;
-
- /* This time, update constant value before printing it. */
- if ((insn->arg[j].X_op == O_constant)
- && (check_range (&insn->arg[j].constant, cur_size[j],
- cur_flags[j], 1) != OP_LEGAL))
- as_fatal (_("Illegal operand (arg %d)"), j+1);
- }
-
- /* First, copy the instruction's opcode. */
- output_opcode[0] = BIN (instruction->match, instruction->match_bits);
-
- for (i = 0; i < insn->nargs; i++)
- {
- cur_arg_num = i;
- print_operand (cur_size[i], instruction->operands[i].shift,
- &insn->arg[i]);
- }
- }
-
- return 1;
-}
-
-/* Bunch of error checkings.
- The checks are made after a matching instruction was found. */
-
-void
-warn_if_needed (ins *insn)
-{
- /* If the post-increment address mode is used and the load/store
- source register is the same as rbase, the result of the
- instruction is undefined. */
- if (IS_INSN_TYPE (LD_STOR_INS_INC))
- {
- /* Enough to verify that one of the arguments is a simple reg. */
- if ((insn->arg[0].type == arg_r) || (insn->arg[1].type == arg_r))
- if (insn->arg[0].r == insn->arg[1].r)
- as_bad (_("Same src/dest register is used (`r%d'), result is undefined"),
- insn->arg[0].r);
- }
-
- /* Some instruction assume the stack pointer as rptr operand.
- Issue an error when the register to be loaded is also SP. */
- if (instruction->flags & NO_SP)
- {
- if (getreg_image (insn->arg[0].r) == getreg_image (sp))
- as_bad (_("`%s' has undefined result"), ins_parse);
- }
-
- /* If the rptr register is specified as one of the registers to be loaded,
- the final contents of rptr are undefined. Thus, we issue an error. */
- if (instruction->flags & NO_RPTR)
- {
- if ((1 << getreg_image (insn->arg[0].r)) & insn->arg[1].constant)
- as_bad (_("Same src/dest register is used (`r%d'), result is undefined"),
- getreg_image (insn->arg[0].r));
- }
-}
-
-/* In some cases, we need to adjust the instruction pointer although a
- match was already found. Here, we gather all these cases.
- Returns 1 if instruction pointer was adjusted, otherwise 0. */
-
-int
-adjust_if_needed (ins *insn)
-{
- int ret_value = 0;
-
- /* Special check for 'addub $0, r0' instruction -
- The opcode '0000 0000 0000 0000' is not allowed. */
- if (IS_INSN_MNEMONIC ("addub"))
- {
- if ((instruction->operands[0].op_type == cst4)
- && instruction->operands[1].op_type == regr)
- {
- if (insn->arg[0].constant == 0 && insn->arg[1].r == r0)
- {
- instruction++;
- ret_value = 1;
- }
- }
- }
-
- /* Optimization: Omit a zero displacement in bit operations,
- saving 2-byte encoding space (e.g., 'cbitw $8, 0(r1)'). */
- if (IS_INSN_TYPE (CSTBIT_INS))
- {
- if ((instruction->operands[1].op_type == rbase_disps12)
- && (insn->arg[1].X_op == O_constant)
- && (insn->arg[1].constant == 0))
- {
- instruction--;
- ret_value = 1;
- }
- }
-
- return ret_value;
-}
-
-/* Set the appropriate bit for register 'r' in 'mask'.
- This indicates that this register is loaded or stored by
- the instruction. */
-
-static void
-mask_reg (int r, unsigned short int *mask)
-{
- if ((reg)r > (reg)sp)
- {
- as_bad (_("Invalid Register in Register List"));
- return;
- }
-
- *mask |= (1 << r);
-}
-
-/* Preprocess register list - create a 16-bit mask with one bit for each
- of the 16 general purpose registers. If a bit is set, it indicates
- that this register is loaded or stored by the instruction. */
-
-static char *
-preprocess_reglist (char *param, int *allocated)
-{
- char reg_name[MAX_REGNAME_LEN]; /* Current parsed register name. */
- char *regP; /* Pointer to 'reg_name' string. */
- int reg_counter = 0; /* Count number of parsed registers. */
- unsigned short int mask = 0; /* Mask for 16 general purpose registers. */
- char *new_param; /* New created operands string. */
- char *paramP = param; /* Pointer to original opearands string. */
- char maskstring[10]; /* Array to print the mask as a string. */
- int hi_found = 0, lo_found = 0; /* Boolean flags for hi/lo registers. */
- reg r;
- copreg cr;
-
- /* If 'param' is already in form of a number, no need to preprocess. */
- if (strchr (paramP, '{') == NULL)
- return param;
-
- /* Verifying correct syntax of operand. */
- if (strchr (paramP, '}') == NULL)
- as_fatal (_("Missing matching brackets : `%s'"), ins_parse);
-
- while (*paramP++ != '{');
-
- new_param = (char *)xcalloc (MAX_INST_LEN, sizeof (char));
- *allocated = 1;
- strncpy (new_param, param, paramP - param - 1);
-
- while (*paramP != '}')
- {
- regP = paramP;
- memset (&reg_name, '\0', sizeof (reg_name));
-
- while (ISALNUM (*paramP))
- paramP++;
-
- strncpy (reg_name, regP, paramP - regP);
-
- /* Coprocessor register c<N>. */
- if (IS_INSN_TYPE (COP_REG_INS))
- {
- if (((cr = get_copregister (reg_name)) == nullcopregister)
- || (crx_copregtab[cr-MAX_REG].type != CRX_C_REGTYPE))
- as_fatal (_("Illegal register `%s' in cop-register list"), reg_name);
- mask_reg (getreg_image (cr - c0), &mask);
- }
- /* Coprocessor Special register cs<N>. */
- else if (IS_INSN_TYPE (COPS_REG_INS))
- {
- if (((cr = get_copregister (reg_name)) == nullcopregister)
- || (crx_copregtab[cr-MAX_REG].type != CRX_CS_REGTYPE))
- as_fatal (_("Illegal register `%s' in cop-special-register list"),
- reg_name);
- mask_reg (getreg_image (cr - cs0), &mask);
- }
- /* User register u<N>. */
- else if (instruction->flags & USER_REG)
- {
- if (streq(reg_name, "uhi"))
- {
- hi_found = 1;
- goto next_inst;
- }
- else if (streq(reg_name, "ulo"))
- {
- lo_found = 1;
- goto next_inst;
- }
- else if (((r = get_register (reg_name)) == nullregister)
- || (crx_regtab[r].type != CRX_U_REGTYPE))
- as_fatal (_("Illegal register `%s' in user register list"), reg_name);
-
- mask_reg (getreg_image (r - u0), &mask);
- }
- /* General purpose register r<N>. */
- else
- {
- if (streq(reg_name, "hi"))
- {
- hi_found = 1;
- goto next_inst;
- }
- else if (streq(reg_name, "lo"))
- {
- lo_found = 1;
- goto next_inst;
- }
- else if (((r = get_register (reg_name)) == nullregister)
- || (crx_regtab[r].type != CRX_R_REGTYPE))
- as_fatal (_("Illegal register `%s' in register list"), reg_name);
-
- mask_reg (getreg_image (r - r0), &mask);
- }
-
- if (++reg_counter > MAX_REGS_IN_MASK16)
- as_bad (_("Maximum %d bits may be set in `mask16' operand"),
- MAX_REGS_IN_MASK16);
-
-next_inst:
- while (!ISALNUM (*paramP) && *paramP != '}')
- paramP++;
- }
-
- if (*++paramP != '\0')
- as_warn (_("rest of line ignored; first ignored character is `%c'"),
- *paramP);
-
- switch (hi_found + lo_found)
- {
- case 0:
- /* At least one register should be specified. */
- if (mask == 0)
- as_bad (_("Illegal `mask16' operand, operation is undefined - `%s'"),
- ins_parse);
- break;
-
- case 1:
- /* HI can't be specified without LO (and vise-versa). */
- as_bad (_("HI/LO registers should be specified together"));
- break;
-
- case 2:
- /* HI/LO registers mustn't be masked with additional registers. */
- if (mask != 0)
- as_bad (_("HI/LO registers should be specified without additional registers"));
-
- default:
- break;
- }
-
- sprintf (maskstring, "$0x%x", mask);
- strcat (new_param, maskstring);
- return new_param;
-}
-
-/* Print the instruction.
- Handle also cases where the instruction is relaxable/relocatable. */
-
-void
-print_insn (ins *insn)
-{
- unsigned int i, j, insn_size;
- char *this_frag;
- unsigned short words[4];
- int addr_mod;
-
- /* Arrange the insn encodings in a WORD size array. */
- for (i = 0, j = 0; i < 2; i++)
- {
- words[j++] = (output_opcode[i] >> 16) & 0xFFFF;
- words[j++] = output_opcode[i] & 0xFFFF;
- }
-
- /* Handle relaxtion. */
- if ((instruction->flags & RELAXABLE) && relocatable)
- {
- int relax_subtype;
-
- /* Write the maximal instruction size supported. */
- insn_size = INSN_MAX_SIZE;
-
- /* bCC */
- if (IS_INSN_TYPE (BRANCH_INS))
- relax_subtype = 0;
- /* bal */
- else if (IS_INSN_TYPE (DCR_BRANCH_INS) || IS_INSN_MNEMONIC ("bal"))
- relax_subtype = 3;
- /* cmpbr/bcop */
- else if (IS_INSN_TYPE (CMPBR_INS) || IS_INSN_TYPE (COP_BRANCH_INS))
- relax_subtype = 5;
- else
- abort ();
-
- this_frag = frag_var (rs_machine_dependent, insn_size * 2,
- 4, relax_subtype,
- insn->exp.X_add_symbol,
- insn->exp.X_add_number,
- 0);
- }
- else
- {
- insn_size = instruction->size;
- this_frag = frag_more (insn_size * 2);
-
- /* Handle relocation. */
- if ((relocatable) && (insn->rtype != BFD_RELOC_NONE))
- {
- reloc_howto_type *reloc_howto;
- int size;
-
- reloc_howto = bfd_reloc_type_lookup (stdoutput, insn->rtype);
-
- if (!reloc_howto)
- abort ();
-
- size = bfd_get_reloc_size (reloc_howto);
-
- if (size < 1 || size > 4)
- abort ();
-
- fix_new_exp (frag_now, this_frag - frag_now->fr_literal,
- size, &insn->exp, reloc_howto->pc_relative,
- insn->rtype);
- }
- }
-
- /* Verify a 2-byte code alignment. */
- addr_mod = frag_now_fix () & 1;
- if (frag_now->has_code && frag_now->insn_addr != addr_mod)
- as_bad (_("instruction address is not a multiple of 2"));
- frag_now->insn_addr = addr_mod;
- frag_now->has_code = 1;
-
- /* Write the instruction encoding to frag. */
- for (i = 0; i < insn_size; i++)
- {
- md_number_to_chars (this_frag, (valueT) words[i], 2);
- this_frag += 2;
- }
-}
-
-/* This is the guts of the machine-dependent assembler. OP points to a
- machine dependent instruction. This function is supposed to emit
- the frags/bytes it assembles to. */
-
-void
-md_assemble (char *op)
-{
- ins crx_ins;
- char *param;
- char c;
-
- /* Reset global variables for a new instruction. */
- reset_vars (op);
-
- /* Strip the mnemonic. */
- for (param = op; *param != 0 && !ISSPACE (*param); param++)
- ;
- c = *param;
- *param++ = '\0';
-
- /* Find the instruction. */
- instruction = (const inst *) hash_find (crx_inst_hash, op);
- if (instruction == NULL)
- {
- as_bad (_("Unknown opcode: `%s'"), op);
- return;
- }
-
- /* Tie dwarf2 debug info to the address at the start of the insn. */
- dwarf2_emit_insn (0);
-
- /* Parse the instruction's operands. */
- parse_insn (&crx_ins, param);
-
- /* Assemble the instruction - return upon failure. */
- if (assemble_insn (op, &crx_ins) == 0)
- return;
-
- /* Print the instruction. */
- print_insn (&crx_ins);
-}