1291 lines
30 KiB
C
1291 lines
30 KiB
C
/* tc-i860.c -- Assemble for the I860
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Copyright (C) 1989, 1992, 1993 Free Software Foundation, Inc.
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This file is part of GAS, the GNU Assembler.
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GAS 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, or (at your option)
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any later version.
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GAS 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 GAS; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "as.h"
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#include "opcode/i860.h"
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void md_begin ();
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void md_number_to_chars ();
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void md_assemble ();
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char *md_atof ();
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void md_convert_frag ();
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void md_create_short_jump ();
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void md_create_long_jump ();
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int md_estimate_size_before_relax ();
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void md_number_to_imm ();
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void md_number_to_disp ();
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void md_number_to_field ();
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void md_ri_to_chars ();
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static void i860_ip ();
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/* void emit_machine_reloc(); */
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const int md_reloc_size = sizeof (struct relocation_info);
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/* void (*md_emit_relocations)() = emit_machine_reloc; */
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/* handle of the OPCODE hash table */
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static struct hash_control *op_hash = NULL;
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static void s_dual (), s_enddual ();
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static void s_atmp ();
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const pseudo_typeS
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md_pseudo_table[] =
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{
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{"dual", s_dual, 4},
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{"enddual", s_enddual, 4},
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{"atmp", s_atmp, 4},
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{NULL, 0, 0},
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};
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int md_short_jump_size = 4;
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int md_long_jump_size = 4;
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/* This array holds the chars that always start a comment. If the
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pre-processor is disabled, these aren't very useful */
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const char comment_chars[] = "!/"; /* JF removed '|' from comment_chars */
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/* This array holds the chars that only start a comment at the beginning of
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a line. If the line seems to have the form '# 123 filename'
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.line and .file directives will appear in the pre-processed output */
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/* Note that input_file.c hand checks for '#' at the beginning of the
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first line of the input file. This is because the compiler outputs
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#NO_APP at the beginning of its output. */
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/* Also note that comments like this one will always work. */
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const char line_comment_chars[] = "#/";
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const char line_separator_chars[] = "";
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/* Chars that can be used to separate mant from exp in floating point nums */
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const char EXP_CHARS[] = "eE";
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/* Chars that mean this number is a floating point constant */
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/* As in 0f12.456 */
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/* or 0d1.2345e12 */
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const char FLT_CHARS[] = "rRsSfFdDxXpP";
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/* Also be aware that MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT may have to be
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changed in read.c . Ideally it shouldn't have to know about it at all,
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but nothing is ideal around here.
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*/
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int size_reloc_info = sizeof (struct relocation_info);
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static unsigned char octal[256];
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#define isoctal(c) octal[c]
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static unsigned char toHex[256];
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struct i860_it
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{
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char *error;
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unsigned long opcode;
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struct nlist *nlistp;
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expressionS exp;
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int pcrel;
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enum expand_type expand;
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enum highlow_type highlow;
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enum reloc_type reloc;
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} the_insn;
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#if __STDC__ == 1
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static void print_insn (struct i860_it *insn);
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static int getExpression (char *str);
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#else /* not __STDC__ */
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static void print_insn ();
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static int getExpression ();
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#endif /* not __STDC__ */
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static char *expr_end;
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static char last_expand; /* error if expansion after branch */
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enum dual
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{
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DUAL_OFF = 0, DUAL_ON, DUAL_DDOT, DUAL_ONDDOT,
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};
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static enum dual dual_mode = DUAL_OFF; /* dual-instruction mode */
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static void
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s_dual () /* floating point instructions have dual set */
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{
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dual_mode = DUAL_ON;
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}
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static void
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s_enddual () /* floating point instructions have dual set */
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{
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dual_mode = DUAL_OFF;
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}
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static int atmp = 31; /* temporary register for pseudo's */
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static void
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s_atmp ()
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{
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register int temp;
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if (strncmp (input_line_pointer, "sp", 2) == 0)
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{
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input_line_pointer += 2;
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atmp = 2;
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}
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else if (strncmp (input_line_pointer, "fp", 2) == 0)
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{
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input_line_pointer += 2;
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atmp = 3;
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}
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else if (strncmp (input_line_pointer, "r", 1) == 0)
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{
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input_line_pointer += 1;
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temp = get_absolute_expression ();
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if (temp >= 0 && temp <= 31)
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atmp = temp;
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else
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as_bad ("Unknown temporary pseudo register");
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}
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else
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{
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as_bad ("Unknown temporary pseudo register");
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}
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demand_empty_rest_of_line ();
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}
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/* This function is called once, at assembler startup time. It should
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set up all the tables, etc. that the MD part of the assembler will need. */
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void
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md_begin ()
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{
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register char *retval = NULL;
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int lose = 0;
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register unsigned int i = 0;
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op_hash = hash_new ();
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while (i < NUMOPCODES)
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{
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const char *name = i860_opcodes[i].name;
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retval = hash_insert (op_hash, name, &i860_opcodes[i]);
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if (retval != NULL)
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{
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fprintf (stderr, "internal error: can't hash `%s': %s\n",
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i860_opcodes[i].name, retval);
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lose = 1;
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}
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do
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{
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if (i860_opcodes[i].match & i860_opcodes[i].lose)
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{
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fprintf (stderr, "internal error: losing opcode: `%s' \"%s\"\n",
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i860_opcodes[i].name, i860_opcodes[i].args);
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lose = 1;
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}
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++i;
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}
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while (i < NUMOPCODES
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&& !strcmp (i860_opcodes[i].name, name));
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}
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if (lose)
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as_fatal ("Broken assembler. No assembly attempted.");
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for (i = '0'; i < '8'; ++i)
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octal[i] = 1;
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for (i = '0'; i <= '9'; ++i)
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toHex[i] = i - '0';
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for (i = 'a'; i <= 'f'; ++i)
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toHex[i] = i + 10 - 'a';
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for (i = 'A'; i <= 'F'; ++i)
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toHex[i] = i + 10 - 'A';
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}
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void
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md_assemble (str)
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char *str;
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{
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char *toP;
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int rsd;
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int no_opcodes = 1;
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int i;
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struct i860_it pseudo[3];
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assert (str);
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i860_ip (str);
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/* check for expandable flag to produce pseudo-instructions */
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if (the_insn.expand != 0 && the_insn.highlow == NO_SPEC)
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{
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for (i = 0; i < 3; i++)
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pseudo[i] = the_insn;
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switch (the_insn.expand)
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{
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case E_DELAY:
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no_opcodes = 1;
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break;
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case E_MOV:
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if (the_insn.exp.X_add_symbol == NULL &&
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the_insn.exp.X_op_symbol == NULL &&
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(the_insn.exp.X_add_number < (1 << 15) &&
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the_insn.exp.X_add_number >= -(1 << 15)))
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break;
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/* or l%const,r0,ireg_dest */
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pseudo[0].opcode = (the_insn.opcode & 0x001f0000) | 0xe4000000;
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pseudo[0].highlow = PAIR;
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/* orh h%const,ireg_dest,ireg_dest */
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pseudo[1].opcode = (the_insn.opcode & 0x03ffffff) | 0xec000000 |
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((the_insn.opcode & 0x001f0000) << 5);
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pseudo[1].highlow = HIGH;
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no_opcodes = 2;
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break;
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case E_ADDR:
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if (the_insn.exp.X_add_symbol == NULL &&
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the_insn.exp.X_op_symbol == NULL)
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break;
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/* orh ha%addr_expr,r0,r31 */
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pseudo[0].opcode = 0xec000000 | (atmp << 16);
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pseudo[0].highlow = HIGHADJ;
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pseudo[0].reloc = LOW0; /* must overwrite */
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/* l%addr_expr(r31),ireg_dest */
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pseudo[1].opcode = (the_insn.opcode & ~0x003e0000) | (atmp << 21);
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pseudo[1].highlow = PAIR;
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no_opcodes = 2;
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break;
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case E_U32: /* 2nd version emulates Intel as, not doc. */
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if (the_insn.exp.X_add_symbol == NULL &&
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the_insn.exp.X_op_symbol == NULL &&
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(the_insn.exp.X_add_number < (1 << 16) &&
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the_insn.exp.X_add_number >= 0))
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break;
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/* $(opcode)h h%const,ireg_src2,ireg_dest
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pseudo[0].opcode = (the_insn.opcode & 0xf3ffffff) | 0x0c000000; */
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/* $(opcode)h h%const,ireg_src2,r31 */
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pseudo[0].opcode = (the_insn.opcode & 0xf3e0ffff) | 0x0c000000 |
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(atmp << 16);
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pseudo[0].highlow = HIGH;
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/* $(opcode) l%const,ireg_dest,ireg_dest
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pseudo[1].opcode = (the_insn.opcode & 0xf01f0000) | 0x04000000 |
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((the_insn.opcode & 0x001f0000) << 5); */
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/* $(opcode) l%const,r31,ireg_dest */
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pseudo[1].opcode = (the_insn.opcode & 0xf01f0000) | 0x04000000 |
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(atmp << 21);
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pseudo[1].highlow = PAIR;
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no_opcodes = 2;
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break;
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case E_AND: /* 2nd version emulates Intel as, not doc. */
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if (the_insn.exp.X_add_symbol == NULL &&
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the_insn.exp.X_op_symbol == NULL &&
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(the_insn.exp.X_add_number < (1 << 16) &&
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the_insn.exp.X_add_number >= 0))
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break;
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/* andnot h%const,ireg_src2,ireg_dest
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pseudo[0].opcode = (the_insn.opcode & 0x03ffffff) | 0xd4000000; */
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/* andnot h%const,ireg_src2,r31 */
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pseudo[0].opcode = (the_insn.opcode & 0x03e0ffff) | 0xd4000000 |
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(atmp << 16);
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pseudo[0].highlow = HIGH;
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pseudo[0].exp.X_add_number = -1 - the_insn.exp.X_add_number;
|
||
/* andnot l%const,ireg_dest,ireg_dest
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pseudo[1].opcode = (the_insn.opcode & 0x001f0000) | 0xd4000000 |
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((the_insn.opcode & 0x001f0000) << 5); */
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/* andnot l%const,r31,ireg_dest */
|
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pseudo[1].opcode = (the_insn.opcode & 0x001f0000) | 0xd4000000 |
|
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(atmp << 21);
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||
pseudo[1].highlow = PAIR;
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||
pseudo[1].exp.X_add_number = -1 - the_insn.exp.X_add_number;
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no_opcodes = 2;
|
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break;
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||
|
||
case E_S32:
|
||
if (the_insn.exp.X_add_symbol == NULL &&
|
||
the_insn.exp.X_op_symbol == NULL &&
|
||
(the_insn.exp.X_add_number < (1 << 15) &&
|
||
the_insn.exp.X_add_number >= -(1 << 15)))
|
||
break;
|
||
/* orh h%const,r0,r31 */
|
||
pseudo[0].opcode = 0xec000000 | (atmp << 16);
|
||
pseudo[0].highlow = HIGH;
|
||
/* or l%const,r31,r31 */
|
||
pseudo[1].opcode = 0xe4000000 | (atmp << 21) | (atmp << 16);
|
||
pseudo[1].highlow = PAIR;
|
||
/* r31,ireg_src2,ireg_dest */
|
||
pseudo[2].opcode = (the_insn.opcode & ~0x0400ffff) | (atmp << 11);
|
||
pseudo[2].reloc = NO_RELOC;
|
||
no_opcodes = 3;
|
||
break;
|
||
|
||
default:
|
||
as_fatal ("failed sanity check.");
|
||
}
|
||
|
||
the_insn = pseudo[0];
|
||
/* check for expanded opcode after branch or in dual */
|
||
if (no_opcodes > 1 && last_expand == 1)
|
||
as_warn ("Expanded opcode after delayed branch: `%s'", str);
|
||
if (no_opcodes > 1 && dual_mode != DUAL_OFF)
|
||
as_warn ("Expanded opcode in dual mode: `%s'", str);
|
||
}
|
||
|
||
i = 0;
|
||
do
|
||
{ /* always produce at least one opcode */
|
||
toP = frag_more (4);
|
||
/* put out the opcode */
|
||
md_number_to_chars (toP, the_insn.opcode, 4);
|
||
|
||
/* check for expanded opcode after branch or in dual */
|
||
last_expand = the_insn.pcrel;
|
||
|
||
/* put out the symbol-dependent stuff */
|
||
if (the_insn.reloc != NO_RELOC)
|
||
{
|
||
fix_new (frag_now, /* which frag */
|
||
(toP - frag_now->fr_literal), /* where */
|
||
4, /* size */
|
||
&the_insn.exp,
|
||
the_insn.pcrel,
|
||
/* merge bit fields into one argument */
|
||
(int) (((the_insn.highlow & 0x3) << 4) | (the_insn.reloc & 0xf)));
|
||
}
|
||
the_insn = pseudo[++i];
|
||
}
|
||
while (--no_opcodes > 0);
|
||
|
||
}
|
||
|
||
static void
|
||
i860_ip (str)
|
||
char *str;
|
||
{
|
||
char *s;
|
||
const char *args;
|
||
char c;
|
||
unsigned long i;
|
||
struct i860_opcode *insn;
|
||
char *argsStart;
|
||
unsigned long opcode;
|
||
unsigned int mask;
|
||
int match = 0;
|
||
int comma = 0;
|
||
|
||
|
||
for (s = str; islower (*s) || *s == '.' || *s == '3'; ++s)
|
||
;
|
||
switch (*s)
|
||
{
|
||
|
||
case '\0':
|
||
break;
|
||
|
||
case ',':
|
||
comma = 1;
|
||
|
||
/*FALLTHROUGH*/
|
||
|
||
case ' ':
|
||
*s++ = '\0';
|
||
break;
|
||
|
||
default:
|
||
as_fatal ("Unknown opcode: `%s'", str);
|
||
}
|
||
|
||
if (strncmp (str, "d.", 2) == 0)
|
||
{ /* check for d. opcode prefix */
|
||
if (dual_mode == DUAL_ON)
|
||
dual_mode = DUAL_ONDDOT;
|
||
else
|
||
dual_mode = DUAL_DDOT;
|
||
str += 2;
|
||
}
|
||
|
||
if ((insn = (struct i860_opcode *) hash_find (op_hash, str)) == NULL)
|
||
{
|
||
if (dual_mode == DUAL_DDOT || dual_mode == DUAL_ONDDOT)
|
||
str -= 2;
|
||
as_bad ("Unknown opcode: `%s'", str);
|
||
return;
|
||
}
|
||
if (comma)
|
||
{
|
||
*--s = ',';
|
||
}
|
||
argsStart = s;
|
||
for (;;)
|
||
{
|
||
opcode = insn->match;
|
||
memset (&the_insn, '\0', sizeof (the_insn));
|
||
the_insn.reloc = NO_RELOC;
|
||
|
||
/*
|
||
* Build the opcode, checking as we go to make
|
||
* sure that the operands match
|
||
*/
|
||
for (args = insn->args;; ++args)
|
||
{
|
||
switch (*args)
|
||
{
|
||
|
||
case '\0': /* end of args */
|
||
if (*s == '\0')
|
||
{
|
||
match = 1;
|
||
}
|
||
break;
|
||
|
||
case '+':
|
||
case '(': /* these must match exactly */
|
||
case ')':
|
||
case ',':
|
||
case ' ':
|
||
if (*s++ == *args)
|
||
continue;
|
||
break;
|
||
|
||
case '#': /* must be at least one digit */
|
||
if (isdigit (*s++))
|
||
{
|
||
while (isdigit (*s))
|
||
{
|
||
++s;
|
||
}
|
||
continue;
|
||
}
|
||
break;
|
||
|
||
case '1': /* next operand must be a register */
|
||
case '2':
|
||
case 'd':
|
||
switch (*s)
|
||
{
|
||
|
||
case 'f': /* frame pointer */
|
||
s++;
|
||
if (*s++ == 'p')
|
||
{
|
||
mask = 0x3;
|
||
break;
|
||
}
|
||
goto error;
|
||
|
||
case 's': /* stack pointer */
|
||
s++;
|
||
if (*s++ == 'p')
|
||
{
|
||
mask = 0x2;
|
||
break;
|
||
}
|
||
goto error;
|
||
|
||
case 'r': /* any register */
|
||
s++;
|
||
if (!isdigit (c = *s++))
|
||
{
|
||
goto error;
|
||
}
|
||
if (isdigit (*s))
|
||
{
|
||
if ((c = 10 * (c - '0') + (*s++ - '0')) >= 32)
|
||
{
|
||
goto error;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
c -= '0';
|
||
}
|
||
mask = c;
|
||
break;
|
||
|
||
default: /* not this opcode */
|
||
goto error;
|
||
}
|
||
/*
|
||
* Got the register, now figure out where
|
||
* it goes in the opcode.
|
||
*/
|
||
switch (*args)
|
||
{
|
||
|
||
case '1':
|
||
opcode |= mask << 11;
|
||
continue;
|
||
|
||
case '2':
|
||
opcode |= mask << 21;
|
||
continue;
|
||
|
||
case 'd':
|
||
opcode |= mask << 16;
|
||
continue;
|
||
|
||
}
|
||
break;
|
||
|
||
case 'e': /* next operand is a floating point register */
|
||
case 'f':
|
||
case 'g':
|
||
if (*s++ == 'f' && isdigit (*s))
|
||
{
|
||
mask = *s++;
|
||
if (isdigit (*s))
|
||
{
|
||
mask = 10 * (mask - '0') + (*s++ - '0');
|
||
if (mask >= 32)
|
||
{
|
||
break;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
mask -= '0';
|
||
}
|
||
switch (*args)
|
||
{
|
||
|
||
case 'e':
|
||
opcode |= mask << 11;
|
||
continue;
|
||
|
||
case 'f':
|
||
opcode |= mask << 21;
|
||
continue;
|
||
|
||
case 'g':
|
||
opcode |= mask << 16;
|
||
if (dual_mode != DUAL_OFF)
|
||
opcode |= (1 << 9); /* dual mode instruction */
|
||
if (dual_mode == DUAL_DDOT)
|
||
dual_mode = DUAL_OFF;
|
||
if (dual_mode == DUAL_ONDDOT)
|
||
dual_mode = DUAL_ON;
|
||
if ((opcode & (1 << 10)) && (mask == ((opcode >> 11) & 0x1f)))
|
||
as_warn ("Fsr1 equals fdest with Pipelining");
|
||
continue;
|
||
}
|
||
}
|
||
break;
|
||
|
||
case 'c': /* next operand must be a control register */
|
||
if (strncmp (s, "fir", 3) == 0)
|
||
{
|
||
opcode |= 0x0 << 21;
|
||
s += 3;
|
||
continue;
|
||
}
|
||
if (strncmp (s, "psr", 3) == 0)
|
||
{
|
||
opcode |= 0x1 << 21;
|
||
s += 3;
|
||
continue;
|
||
}
|
||
if (strncmp (s, "dirbase", 7) == 0)
|
||
{
|
||
opcode |= 0x2 << 21;
|
||
s += 7;
|
||
continue;
|
||
}
|
||
if (strncmp (s, "db", 2) == 0)
|
||
{
|
||
opcode |= 0x3 << 21;
|
||
s += 2;
|
||
continue;
|
||
}
|
||
if (strncmp (s, "fsr", 3) == 0)
|
||
{
|
||
opcode |= 0x4 << 21;
|
||
s += 3;
|
||
continue;
|
||
}
|
||
if (strncmp (s, "epsr", 4) == 0)
|
||
{
|
||
opcode |= 0x5 << 21;
|
||
s += 4;
|
||
continue;
|
||
}
|
||
break;
|
||
|
||
case '5': /* 5 bit immediate in src1 */
|
||
memset (&the_insn, '\0', sizeof (the_insn));
|
||
if (!getExpression (s))
|
||
{
|
||
s = expr_end;
|
||
if (the_insn.exp.X_add_number & ~0x1f)
|
||
as_bad ("5-bit immediate too large");
|
||
opcode |= (the_insn.exp.X_add_number & 0x1f) << 11;
|
||
memset (&the_insn, '\0', sizeof (the_insn));
|
||
the_insn.reloc = NO_RELOC;
|
||
continue;
|
||
}
|
||
break;
|
||
|
||
case 'l': /* 26 bit immediate, relative branch */
|
||
the_insn.reloc = BRADDR;
|
||
the_insn.pcrel = 1;
|
||
goto immediate;
|
||
|
||
case 's': /* 16 bit immediate, split relative branch */
|
||
/* upper 5 bits of offset in dest field */
|
||
the_insn.pcrel = 1;
|
||
the_insn.reloc = SPLIT0;
|
||
goto immediate;
|
||
|
||
case 'S': /* 16 bit immediate, split (st), aligned */
|
||
if (opcode & (1 << 28))
|
||
if (opcode & 0x1)
|
||
the_insn.reloc = SPLIT2;
|
||
else
|
||
the_insn.reloc = SPLIT1;
|
||
else
|
||
the_insn.reloc = SPLIT0;
|
||
goto immediate;
|
||
|
||
case 'I': /* 16 bit immediate, aligned */
|
||
if (opcode & (1 << 28))
|
||
if (opcode & 0x1)
|
||
the_insn.reloc = LOW2;
|
||
else
|
||
the_insn.reloc = LOW1;
|
||
else
|
||
the_insn.reloc = LOW0;
|
||
goto immediate;
|
||
|
||
case 'i': /* 16 bit immediate */
|
||
the_insn.reloc = LOW0;
|
||
|
||
/*FALLTHROUGH*/
|
||
|
||
immediate:
|
||
if (*s == ' ')
|
||
s++;
|
||
if (strncmp (s, "ha%", 3) == 0)
|
||
{
|
||
the_insn.highlow = HIGHADJ;
|
||
s += 3;
|
||
}
|
||
else if (strncmp (s, "h%", 2) == 0)
|
||
{
|
||
the_insn.highlow = HIGH;
|
||
s += 2;
|
||
}
|
||
else if (strncmp (s, "l%", 2) == 0)
|
||
{
|
||
the_insn.highlow = PAIR;
|
||
s += 2;
|
||
}
|
||
the_insn.expand = insn->expand;
|
||
|
||
/* Note that if the getExpression() fails, we will still have
|
||
created U entries in the symbol table for the 'symbols'
|
||
in the input string. Try not to create U symbols for
|
||
registers, etc. */
|
||
|
||
if (!getExpression (s))
|
||
{
|
||
s = expr_end;
|
||
continue;
|
||
}
|
||
break;
|
||
|
||
default:
|
||
as_fatal ("failed sanity check.");
|
||
}
|
||
break;
|
||
}
|
||
error:
|
||
if (match == 0)
|
||
{
|
||
/* Args don't match. */
|
||
if (&insn[1] - i860_opcodes < NUMOPCODES
|
||
&& !strcmp (insn->name, insn[1].name))
|
||
{
|
||
++insn;
|
||
s = argsStart;
|
||
continue;
|
||
}
|
||
else
|
||
{
|
||
as_bad ("Illegal operands");
|
||
return;
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
|
||
the_insn.opcode = opcode;
|
||
}
|
||
|
||
static int
|
||
getExpression (str)
|
||
char *str;
|
||
{
|
||
char *save_in;
|
||
segT seg;
|
||
|
||
save_in = input_line_pointer;
|
||
input_line_pointer = str;
|
||
seg = expression (&the_insn.exp);
|
||
if (seg != absolute_section
|
||
&& seg != undefined_section
|
||
&& ! SEG_NORMAL (seg))
|
||
{
|
||
the_insn.error = "bad segment";
|
||
expr_end = input_line_pointer;
|
||
input_line_pointer = save_in;
|
||
return 1;
|
||
}
|
||
expr_end = input_line_pointer;
|
||
input_line_pointer = save_in;
|
||
return 0;
|
||
}
|
||
|
||
|
||
/*
|
||
This is identical to the md_atof in m68k.c. I think this is right,
|
||
but I'm not sure.
|
||
|
||
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.
|
||
*/
|
||
|
||
/* Equal to MAX_PRECISION in atof-ieee.c */
|
||
#define MAX_LITTLENUMS 6
|
||
|
||
char *
|
||
md_atof (type, litP, sizeP)
|
||
char type;
|
||
char *litP;
|
||
int *sizeP;
|
||
{
|
||
int prec;
|
||
LITTLENUM_TYPE words[MAX_LITTLENUMS];
|
||
LITTLENUM_TYPE *wordP;
|
||
char *t;
|
||
char *atof_ieee ();
|
||
|
||
switch (type)
|
||
{
|
||
|
||
case 'f':
|
||
case 'F':
|
||
case 's':
|
||
case 'S':
|
||
prec = 2;
|
||
break;
|
||
|
||
case 'd':
|
||
case 'D':
|
||
case 'r':
|
||
case 'R':
|
||
prec = 4;
|
||
break;
|
||
|
||
case 'x':
|
||
case 'X':
|
||
prec = 6;
|
||
break;
|
||
|
||
case 'p':
|
||
case 'P':
|
||
prec = 6;
|
||
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 * sizeof (LITTLENUM_TYPE);
|
||
for (wordP = words; prec--;)
|
||
{
|
||
md_number_to_chars (litP, (long) (*wordP++), sizeof (LITTLENUM_TYPE));
|
||
litP += sizeof (LITTLENUM_TYPE);
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
/*
|
||
* Write out big-endian.
|
||
*/
|
||
void
|
||
md_number_to_chars (buf, val, n)
|
||
char *buf;
|
||
valueT val;
|
||
int n;
|
||
{
|
||
number_to_chars_bigendian (buf, val, n);
|
||
}
|
||
|
||
void
|
||
md_number_to_imm (buf, val, n, fixP)
|
||
char *buf;
|
||
long val;
|
||
int n;
|
||
fixS *fixP;
|
||
{
|
||
enum reloc_type reloc = fixP->fx_r_type & 0xf;
|
||
enum highlow_type highlow = (fixP->fx_r_type >> 4) & 0x3;
|
||
|
||
assert (buf);
|
||
assert (n == 4); /* always on i860 */
|
||
|
||
switch (highlow)
|
||
{
|
||
|
||
case HIGHADJ: /* adjusts the high-order 16-bits */
|
||
if (val & (1 << 15))
|
||
val += (1 << 16);
|
||
|
||
/*FALLTHROUGH*/
|
||
|
||
case HIGH: /* selects the high-order 16-bits */
|
||
val >>= 16;
|
||
break;
|
||
|
||
case PAIR: /* selects the low-order 16-bits */
|
||
val = val & 0xffff;
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
|
||
switch (reloc)
|
||
{
|
||
|
||
case BRADDR: /* br,call,bc,bc.t,bnc,bnc.t w/26-bit immediate */
|
||
if (fixP->fx_pcrel != 1)
|
||
as_bad ("26-bit branch w/o pc relative set: 0x%08x", val);
|
||
val >>= 2; /* align pcrel offset, see manual */
|
||
|
||
if (val >= (1 << 25) || val < -(1 << 25)) /* check for overflow */
|
||
as_bad ("26-bit branch offset overflow: 0x%08x", val);
|
||
buf[0] = (buf[0] & 0xfc) | ((val >> 24) & 0x3);
|
||
buf[1] = val >> 16;
|
||
buf[2] = val >> 8;
|
||
buf[3] = val;
|
||
break;
|
||
|
||
case SPLIT2: /* 16 bit immediate, 4-byte aligned */
|
||
if (val & 0x3)
|
||
as_bad ("16-bit immediate 4-byte alignment error: 0x%08x", val);
|
||
val &= ~0x3; /* 4-byte align value */
|
||
/*FALLTHROUGH*/
|
||
case SPLIT1: /* 16 bit immediate, 2-byte aligned */
|
||
if (val & 0x1)
|
||
as_bad ("16-bit immediate 2-byte alignment error: 0x%08x", val);
|
||
val &= ~0x1; /* 2-byte align value */
|
||
/*FALLTHROUGH*/
|
||
case SPLIT0: /* st,bla,bte,btne w/16-bit immediate */
|
||
if (fixP->fx_pcrel == 1)
|
||
val >>= 2; /* align pcrel offset, see manual */
|
||
/* check for bounds */
|
||
if (highlow != PAIR && (val >= (1 << 16) || val < -(1 << 15)))
|
||
as_bad ("16-bit branch offset overflow: 0x%08x", val);
|
||
buf[1] = (buf[1] & ~0x1f) | ((val >> 11) & 0x1f);
|
||
buf[2] = (buf[2] & ~0x7) | ((val >> 8) & 0x7);
|
||
buf[3] |= val; /* perserve bottom opcode bits */
|
||
break;
|
||
|
||
case LOW4: /* fld,pfld,pst,flush 16-byte aligned */
|
||
if (val & 0xf)
|
||
as_bad ("16-bit immediate 16-byte alignment error: 0x%08x", val);
|
||
val &= ~0xf; /* 16-byte align value */
|
||
/*FALLTHROUGH*/
|
||
case LOW3: /* fld,pfld,pst,flush 8-byte aligned */
|
||
if (val & 0x7)
|
||
as_bad ("16-bit immediate 8-byte alignment error: 0x%08x", val);
|
||
val &= ~0x7; /* 8-byte align value */
|
||
/*FALLTHROUGH*/
|
||
case LOW2: /* 16 bit immediate, 4-byte aligned */
|
||
if (val & 0x3)
|
||
as_bad ("16-bit immediate 4-byte alignment error: 0x%08x", val);
|
||
val &= ~0x3; /* 4-byte align value */
|
||
/*FALLTHROUGH*/
|
||
case LOW1: /* 16 bit immediate, 2-byte aligned */
|
||
if (val & 0x1)
|
||
as_bad ("16-bit immediate 2-byte alignment error: 0x%08x", val);
|
||
val &= ~0x1; /* 2-byte align value */
|
||
/*FALLTHROUGH*/
|
||
case LOW0: /* 16 bit immediate, byte aligned */
|
||
/* check for bounds */
|
||
if (highlow != PAIR && (val >= (1 << 16) || val < -(1 << 15)))
|
||
as_bad ("16-bit immediate overflow: 0x%08x", val);
|
||
buf[2] = val >> 8;
|
||
buf[3] |= val; /* perserve bottom opcode bits */
|
||
break;
|
||
|
||
case NO_RELOC:
|
||
default:
|
||
as_bad ("bad relocation type: 0x%02x", reloc);
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* should never be called for i860 */
|
||
void
|
||
md_create_short_jump (ptr, from_addr, to_addr, frag, to_symbol)
|
||
char *ptr;
|
||
addressT from_addr, to_addr;
|
||
fragS *frag;
|
||
symbolS *to_symbol;
|
||
{
|
||
as_fatal ("i860_create_short_jmp\n");
|
||
}
|
||
|
||
/* should never be called for i860 */
|
||
void
|
||
md_number_to_disp (buf, val, n)
|
||
char *buf;
|
||
long val;
|
||
{
|
||
as_fatal ("md_number_to_disp\n");
|
||
}
|
||
|
||
/* should never be called for i860 */
|
||
void
|
||
md_number_to_field (buf, val, fix)
|
||
char *buf;
|
||
long val;
|
||
void *fix;
|
||
{
|
||
as_fatal ("i860_number_to_field\n");
|
||
}
|
||
|
||
/* the bit-field entries in the relocation_info struct plays hell
|
||
with the byte-order problems of cross-assembly. So as a hack,
|
||
I added this mach. dependent ri twiddler. Ugly, but it gets
|
||
you there. -KWK */
|
||
/* on i860: first 4 bytes are normal unsigned long address, next three
|
||
bytes are index, most sig. byte first. Byte 7 is broken up with
|
||
bit 7 as pcrel, bit 6 as extern, and the lower six bits as
|
||
relocation type (highlow 5-4). Next 4 bytes are long addend. */
|
||
/* Thanx and a tip of the hat to Michael Bloom, mb@ttidca.tti.com */
|
||
void
|
||
md_ri_to_chars (ri_p, ri)
|
||
struct relocation_info *ri_p, ri;
|
||
{
|
||
#if 0
|
||
unsigned char the_bytes[sizeof (*ri_p)];
|
||
|
||
/* this is easy */
|
||
md_number_to_chars (the_bytes, ri.r_address, sizeof (ri.r_address));
|
||
/* now the fun stuff */
|
||
the_bytes[4] = (ri.r_index >> 16) & 0x0ff;
|
||
the_bytes[5] = (ri.r_index >> 8) & 0x0ff;
|
||
the_bytes[6] = ri.r_index & 0x0ff;
|
||
the_bytes[7] = ((ri.r_extern << 7) & 0x80) | (0 & 0x60) | (ri.r_type & 0x1F);
|
||
/* Also easy */
|
||
md_number_to_chars (&the_bytes[8], ri.r_addend, sizeof (ri.r_addend));
|
||
/* now put it back where you found it, Junior... */
|
||
memcpy ((char *) ri_p, the_bytes, sizeof (*ri_p));
|
||
#endif
|
||
}
|
||
|
||
/* should never be called for i860 */
|
||
void
|
||
md_convert_frag (headers, seg, fragP)
|
||
object_headers *headers;
|
||
segT seg;
|
||
register fragS *fragP;
|
||
{
|
||
as_fatal ("i860_convert_frag\n");
|
||
}
|
||
|
||
/* should never be called for i860 */
|
||
void
|
||
md_create_long_jump (ptr, from_addr, to_addr, frag, to_symbol)
|
||
char *ptr;
|
||
addressT from_addr, to_addr;
|
||
fragS *frag;
|
||
symbolS *to_symbol;
|
||
{
|
||
as_fatal ("i860_create_long_jump\n");
|
||
}
|
||
|
||
/* should never be called for i860 */
|
||
int
|
||
md_estimate_size_before_relax (fragP, segtype)
|
||
register fragS *fragP;
|
||
segT segtype;
|
||
{
|
||
as_fatal ("i860_estimate_size_before_relax\n");
|
||
}
|
||
|
||
/* for debugging only, must match enum reloc_type */
|
||
static char *Reloc[] =
|
||
{
|
||
"NO_RELOC",
|
||
"BRADDR",
|
||
"LOW0",
|
||
"LOW1",
|
||
"LOW2",
|
||
"LOW3",
|
||
"LOW4",
|
||
"SPLIT0",
|
||
"SPLIT1",
|
||
"SPLIT2",
|
||
"RELOC_32",
|
||
};
|
||
static char *Highlow[] =
|
||
{
|
||
"NO_SPEC",
|
||
"PAIR",
|
||
"HIGH",
|
||
"HIGHADJ",
|
||
};
|
||
static void
|
||
print_insn (insn)
|
||
struct i860_it *insn;
|
||
{
|
||
if (insn->error)
|
||
{
|
||
fprintf (stderr, "ERROR: %s\n");
|
||
}
|
||
fprintf (stderr, "opcode=0x%08x\t", insn->opcode);
|
||
fprintf (stderr, "expand=0x%08x\t", insn->expand);
|
||
fprintf (stderr, "reloc = %s\t", Reloc[insn->reloc]);
|
||
fprintf (stderr, "highlow = %s\n", Highlow[insn->highlow]);
|
||
fprintf (stderr, "exp = {\n");
|
||
fprintf (stderr, "\t\tX_add_symbol = %s\n",
|
||
insn->exp.X_add_symbol ?
|
||
(S_GET_NAME (insn->exp.X_add_symbol) ?
|
||
S_GET_NAME (insn->exp.X_add_symbol) : "???") : "0");
|
||
fprintf (stderr, "\t\tX_op_symbol = %s\n",
|
||
insn->exp.X_op_symbol ?
|
||
(S_GET_NAME (insn->exp.X_op_symbol) ?
|
||
S_GET_NAME (insn->exp.X_op_symbol) : "???") : "0");
|
||
fprintf (stderr, "\t\tX_add_number = %d\n",
|
||
insn->exp.X_add_number);
|
||
fprintf (stderr, "}\n");
|
||
}
|
||
|
||
CONST char *md_shortopts = "";
|
||
struct option md_longopts[] = {
|
||
{NULL, no_argument, NULL, 0}
|
||
};
|
||
size_t md_longopts_size = sizeof(md_longopts);
|
||
|
||
int
|
||
md_parse_option (c, arg)
|
||
int c;
|
||
char *arg;
|
||
{
|
||
return 0;
|
||
}
|
||
|
||
void
|
||
md_show_usage (stream)
|
||
FILE *stream;
|
||
{
|
||
}
|
||
|
||
#ifdef comment
|
||
/*
|
||
* I860 relocations are completely different, so it needs
|
||
* this machine dependent routine to emit them.
|
||
*/
|
||
void
|
||
emit_machine_reloc (fixP, segment_address_in_file)
|
||
register fixS *fixP;
|
||
relax_addressT segment_address_in_file;
|
||
{
|
||
struct reloc_info_i860 ri;
|
||
register symbolS *symbolP;
|
||
extern char *next_object_file_charP;
|
||
long add_number;
|
||
|
||
memset ((char *) &ri, '\0', sizeof (ri));
|
||
for (; fixP; fixP = fixP->fx_next)
|
||
{
|
||
|
||
if (fixP->fx_r_type & ~0x3f)
|
||
{
|
||
as_fatal ("fixP->fx_r_type = %d\n", fixP->fx_r_type);
|
||
}
|
||
ri.r_pcrel = fixP->fx_pcrel;
|
||
ri.r_type = fixP->fx_r_type;
|
||
|
||
if ((symbolP = fixP->fx_addsy) != NULL)
|
||
{
|
||
ri.r_address = fixP->fx_frag->fr_address +
|
||
fixP->fx_where - segment_address_in_file;
|
||
if (!S_IS_DEFINED (symbolP))
|
||
{
|
||
ri.r_extern = 1;
|
||
ri.r_symbolnum = symbolP->sy_number;
|
||
}
|
||
else
|
||
{
|
||
ri.r_extern = 0;
|
||
ri.r_symbolnum = S_GET_TYPE (symbolP);
|
||
}
|
||
if (symbolP && symbolP->sy_frag)
|
||
{
|
||
ri.r_addend = symbolP->sy_frag->fr_address;
|
||
}
|
||
ri.r_type = fixP->fx_r_type;
|
||
if (fixP->fx_pcrel)
|
||
{
|
||
/* preserve actual offset vs. pc + 4 */
|
||
ri.r_addend -= (ri.r_address + 4);
|
||
}
|
||
else
|
||
{
|
||
ri.r_addend = fixP->fx_addnumber;
|
||
}
|
||
|
||
md_ri_to_chars ((char *) &ri, ri);
|
||
append (&next_object_file_charP, (char *) &ri, sizeof (ri));
|
||
}
|
||
}
|
||
}
|
||
|
||
#endif /* comment */
|
||
|
||
#ifdef OBJ_AOUT
|
||
|
||
/* on i860: first 4 bytes are normal unsigned long address, next three
|
||
bytes are index, most sig. byte first. Byte 7 is broken up with
|
||
bit 7 as pcrel, bit 6 as extern, and the lower six bits as
|
||
relocation type (highlow 5-4). Next 4 bytes are long addend. */
|
||
|
||
void
|
||
tc_aout_fix_to_chars (where, fixP, segment_address_in_file)
|
||
char *where;
|
||
fixS *fixP;
|
||
relax_addressT segment_address_in_file;
|
||
{
|
||
long r_index;
|
||
long r_extern;
|
||
long r_addend = 0;
|
||
long r_address;
|
||
|
||
know (fixP->fx_addsy);
|
||
know (!(fixP->fx_r_type & ~0x3f));
|
||
|
||
if (!S_IS_DEFINED (fixP->fx_addsy))
|
||
{
|
||
r_extern = 1;
|
||
r_index = fixP->fx_addsy->sy_number;
|
||
}
|
||
else
|
||
{
|
||
r_extern = 0;
|
||
r_index = S_GET_TYPE (fixP->fx_addsy);
|
||
}
|
||
|
||
md_number_to_chars (where,
|
||
r_address = fixP->fx_frag->fr_address + fixP->fx_where - segment_address_in_file,
|
||
4);
|
||
|
||
where[4] = (r_index >> 16) & 0x0ff;
|
||
where[5] = (r_index >> 8) & 0x0ff;
|
||
where[6] = r_index & 0x0ff;
|
||
where[7] = (((fixP->fx_pcrel << 7) & 0x80)
|
||
| ((r_extern << 6) & 0x40)
|
||
| (fixP->fx_r_type & 0x3F));
|
||
|
||
if (fixP->fx_addsy->sy_frag)
|
||
{
|
||
r_addend = fixP->fx_addsy->sy_frag->fr_address;
|
||
}
|
||
|
||
if (fixP->fx_pcrel)
|
||
{
|
||
/* preserve actual offset vs. pc + 4 */
|
||
r_addend -= (r_address + 4);
|
||
}
|
||
else
|
||
{
|
||
r_addend = fixP->fx_addnumber;
|
||
}
|
||
|
||
md_number_to_chars (&where[8], r_addend, 4);
|
||
}
|
||
|
||
#endif /* OBJ_AOUT */
|
||
|
||
/* We have no need to default values of symbols. */
|
||
|
||
/* ARGSUSED */
|
||
symbolS *
|
||
md_undefined_symbol (name)
|
||
char *name;
|
||
{
|
||
return 0;
|
||
}
|
||
|
||
/* Round up a section size to the appropriate boundary. */
|
||
valueT
|
||
md_section_align (segment, size)
|
||
segT segment;
|
||
valueT size;
|
||
{
|
||
return size; /* Byte alignment is fine */
|
||
}
|
||
|
||
/* Exactly what point is a PC-relative offset relative TO?
|
||
On the i860, they're relative to the address of the offset, plus
|
||
its size. (??? Is this right? FIXME-SOON!) */
|
||
long
|
||
md_pcrel_from (fixP)
|
||
fixS *fixP;
|
||
{
|
||
return fixP->fx_size + fixP->fx_where + fixP->fx_frag->fr_address;
|
||
}
|
||
|
||
void
|
||
md_apply_fix (fixP, val)
|
||
fixS *fixP;
|
||
long val;
|
||
{
|
||
char *place = fixP->fx_where + fixP->fx_frag->fr_literal;
|
||
|
||
/* looks to me like i860 never has bit fixes. Let's see. xoxorich. */
|
||
know (fixP->fx_bit_fixP == NULL);
|
||
if (!fixP->fx_bit_fixP)
|
||
{
|
||
fixP->fx_addnumber = val;
|
||
md_number_to_imm (place, val, fixP->fx_size, fixP);
|
||
}
|
||
else
|
||
{
|
||
md_number_to_field (place, val, fixP->fx_bit_fixP);
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Local Variables:
|
||
* fill-column: 131
|
||
* comment-column: 0
|
||
* End:
|
||
*/
|
||
|
||
/* end of tc-i860.c */
|