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- /* i860.c -- Assemble for the I860
- Copyright (C) 1989 Free Software Foundation, Inc.
-
- 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 1, 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, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-
- #include <stdio.h>
- #include <ctype.h>
-
- #include "i860-opcode.h"
- #include "as.h"
- #include "frags.h"
- #include "struc-symbol.h"
- #include "flonum.h"
- #include "expr.h"
- #include "hash.h"
- #include "md.h"
- #include "i860.h" /* position dependent redefine */
- #include "write.h"
- #include "read.h"
- #include "symbols.h"
-
- void md_begin();
- void md_end();
- void md_number_to_chars();
- void md_assemble();
- char *md_atof();
- void md_convert_frag();
- void md_create_short_jump();
- void md_create_long_jump();
- int md_estimate_size_before_relax();
- void md_number_to_imm();
- void md_number_to_disp();
- void md_number_to_field();
- void md_ri_to_chars();
- static void i860_ip();
- void emit_relocations();
-
- const relax_typeS md_relax_table[] = { 0 };
-
- /* handle of the OPCODE hash table */
- static struct hash_control *op_hash = NULL;
-
- static void s_dual(), s_enddual();
- static void s_atmp();
-
- const pseudo_typeS
- md_pseudo_table[] = {
- { "dual", s_dual, 4 },
- { "enddual", s_enddual, 4 },
- { "atmp", s_atmp, 4 },
- { NULL, 0, 0 },
- };
-
- int md_short_jump_size = 4;
- int md_long_jump_size = 4;
- int omagic = OMAGIC; /* Magic number for header */
-
- /* This array holds the chars that always start a comment. If the
- pre-processor is disabled, these aren't very useful */
- char comment_chars[] = "!/"; /* JF removed '|' from comment_chars */
-
- /* This array holds the chars that only start a comment at the beginning of
- a line. If the line seems to have the form '# 123 filename'
- .line and .file directives will appear in the pre-processed output */
- /* Note that input_file.c hand checks for '#' at the beginning of the
- first line of the input file. This is because the compiler outputs
- #NO_APP at the beginning of its output. */
- /* Also note that '/*' will always start a comment */
- char line_comment_chars[] = "#/";
-
- /* Chars that can be used to separate mant from exp in floating point nums */
- char EXP_CHARS[] = "eE";
-
- /* Chars that mean this number is a floating point constant */
- /* As in 0f12.456 */
- /* or 0d1.2345e12 */
- char FLT_CHARS[] = "rRsSfFdDxXpP";
-
- /* Also be aware that MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT may have to be
- changed in read.c . Ideally it shouldn't have to know about it at all,
- but nothing is ideal around here.
- */
- int size_reloc_info = sizeof(struct relocation_info);
-
- static unsigned char octal[256];
- #define isoctal(c) octal[c]
- static unsigned char toHex[256];
-
- struct i860_it {
- char *error;
- unsigned long opcode;
- struct nlist *nlistp;
- expressionS exp;
- int pcrel;
- enum expand_type expand;
- enum highlow_type highlow;
- enum reloc_type reloc;
- } the_insn;
-
- #ifdef __STDC__
- static void print_insn(struct i860_it *insn);
- static int getExpression(char *str);
- #else
- static void print_insn();
- static int getExpression();
- #endif
- static char *expr_end;
- static char last_expand; /* error if expansion after branch */
-
- enum dual
- {
- DUAL_OFF = 0, DUAL_ON, DUAL_DDOT, DUAL_ONDDOT,
- };
- static enum dual dual_mode = DUAL_OFF; /* dual-instruction mode */
-
- static void
- s_dual() /* floating point instructions have dual set */
- {
- dual_mode = DUAL_ON;
- }
-
- static void
- s_enddual() /* floating point instructions have dual set */
- {
- dual_mode = DUAL_OFF;
- }
-
- static int atmp = 31; /* temporary register for pseudo's */
-
- static void
- s_atmp()
- {
- register int temp;
- if (strncmp(input_line_pointer, "sp", 2) == 0) {
- input_line_pointer += 2;
- atmp = 2;
- }
- else if (strncmp(input_line_pointer, "fp", 2) == 0) {
- input_line_pointer += 2;
- atmp = 3;
- }
- else if (strncmp(input_line_pointer, "r", 1) == 0) {
- input_line_pointer += 1;
- temp = get_absolute_expression();
- if (temp >= 0 && temp <= 31)
- atmp = temp;
- else
- as_warn("Unknown temporary pseudo register");
- }
- else {
- as_warn("Unknown temporary pseudo register");
- }
- demand_empty_rest_of_line();
- return;
- }
-
- /* This function is called once, at assembler startup time. It should
- set up all the tables, etc. that the MD part of the assembler will need. */
- void
- md_begin()
- {
- register char *retval = NULL;
- int lose = 0;
- register unsigned int i = 0;
-
- op_hash = hash_new();
- if (op_hash == NULL)
- as_fatal("Virtual memory exhausted");
-
- while (i < NUMOPCODES)
- {
- const char *name = i860_opcodes[i].name;
- retval = hash_insert(op_hash, name, &i860_opcodes[i]);
- if(retval != NULL && *retval != '\0')
- {
- fprintf (stderr, "internal error: can't hash `%s': %s\n",
- i860_opcodes[i].name, retval);
- lose = 1;
- }
- do
- {
- if (i860_opcodes[i].match & i860_opcodes[i].lose)
- {
- fprintf (stderr, "internal error: losing opcode: `%s' \"%s\"\n",
- i860_opcodes[i].name, i860_opcodes[i].args);
- lose = 1;
- }
- ++i;
- } while (i < NUMOPCODES
- && !strcmp(i860_opcodes[i].name, name));
- }
-
- if (lose)
- as_fatal ("Broken assembler. No assembly attempted.");
-
- for (i = '0'; i < '8'; ++i)
- octal[i] = 1;
- for (i = '0'; i <= '9'; ++i)
- toHex[i] = i - '0';
- for (i = 'a'; i <= 'f'; ++i)
- toHex[i] = i + 10 - 'a';
- for (i = 'A'; i <= 'F'; ++i)
- toHex[i] = i + 10 - 'A';
- }
-
- void
- md_end()
- {
- return;
- }
-
- void
- md_assemble(str)
- char *str;
- {
- char *toP;
- int rsd;
- int no_opcodes = 1;
- int i;
- struct i860_it pseudo[3];
-
- assert(str);
- i860_ip(str);
-
- /* check for expandable flag to produce pseudo-instructions */
- if (the_insn.expand != 0 && the_insn.highlow == NO_SPEC) {
- for (i = 0; i < 3; i++)
- pseudo[i] = the_insn;
-
- switch (the_insn.expand) {
-
- case E_DELAY:
- no_opcodes = 1;
- break;
-
- case E_MOV:
- if (the_insn.exp.X_add_symbol == NULL &&
- the_insn.exp.X_subtract_symbol == NULL &&
- (the_insn.exp.X_add_number < (1 << 15) &&
- the_insn.exp.X_add_number >= -(1 << 15)))
- break;
- /* or l%const,r0,ireg_dest */
- pseudo[0].opcode = (the_insn.opcode & 0x001f0000) | 0xe4000000;
- pseudo[0].highlow = PAIR;
- /* orh h%const,ireg_dest,ireg_dest */
- pseudo[1].opcode = (the_insn.opcode & 0x03ffffff) | 0xec000000 |
- ((the_insn.opcode & 0x001f0000) << 5);
- pseudo[1].highlow = HIGH;
- no_opcodes = 2;
- break;
-
- case E_ADDR:
- if (the_insn.exp.X_add_symbol == NULL &&
- the_insn.exp.X_subtract_symbol == NULL)
- break;
- /* orh ha%addr_expr,r0,r31 */
- pseudo[0].opcode = 0xec000000 | (atmp<<16);
- pseudo[0].highlow = HIGHADJ;
- pseudo[0].reloc = LOW0; /* must overwrite */
- /* l%addr_expr(r31),ireg_dest */
- pseudo[1].opcode = (the_insn.opcode & ~0x003e0000) | (atmp << 21);
- pseudo[1].highlow = PAIR;
- no_opcodes = 2;
- break;
-
- case E_U32: /* 2nd version emulates Intel as, not doc. */
- if (the_insn.exp.X_add_symbol == NULL &&
- the_insn.exp.X_subtract_symbol == NULL &&
- (the_insn.exp.X_add_number < (1 << 16) &&
- the_insn.exp.X_add_number >= 0))
- break;
- /* $(opcode)h h%const,ireg_src2,ireg_dest
- pseudo[0].opcode = (the_insn.opcode & 0xf3ffffff) | 0x0c000000; */
- /* $(opcode)h h%const,ireg_src2,r31 */
- pseudo[0].opcode = (the_insn.opcode & 0xf3e0ffff) | 0x0c000000 |
- (atmp << 16);
- pseudo[0].highlow = HIGH;
- /* $(opcode) l%const,ireg_dest,ireg_dest
- pseudo[1].opcode = (the_insn.opcode & 0xf01f0000) | 0x04000000 |
- ((the_insn.opcode & 0x001f0000) << 5); */
- /* $(opcode) l%const,r31,ireg_dest */
- pseudo[1].opcode = (the_insn.opcode & 0xf01f0000) | 0x04000000 |
- (atmp << 21);
- pseudo[1].highlow = PAIR;
- no_opcodes = 2;
- break;
-
- case E_AND: /* 2nd version emulates Intel as, not doc. */
- if (the_insn.exp.X_add_symbol == NULL &&
- the_insn.exp.X_subtract_symbol == NULL &&
- (the_insn.exp.X_add_number < (1 << 16) &&
- the_insn.exp.X_add_number >= 0))
- break;
- /* andnot h%const,ireg_src2,ireg_dest
- pseudo[0].opcode = (the_insn.opcode & 0x03ffffff) | 0xd4000000; */
- /* andnot h%const,ireg_src2,r31 */
- pseudo[0].opcode = (the_insn.opcode & 0x03e0ffff) | 0xd4000000 |
- (atmp << 16);
- pseudo[0].highlow = HIGH;
- pseudo[0].exp.X_add_number = -1 - the_insn.exp.X_add_number;
- /* andnot l%const,ireg_dest,ireg_dest
- pseudo[1].opcode = (the_insn.opcode & 0x001f0000) | 0xd4000000 |
- ((the_insn.opcode & 0x001f0000) << 5); */
- /* andnot l%const,r31,ireg_dest */
- pseudo[1].opcode = (the_insn.opcode & 0x001f0000) | 0xd4000000 |
- (atmp << 21);
- pseudo[1].highlow = PAIR;
- pseudo[1].exp.X_add_number = -1 - the_insn.exp.X_add_number;
- no_opcodes = 2;
- break;
-
- case E_S32:
- if (the_insn.exp.X_add_symbol == NULL &&
- the_insn.exp.X_subtract_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:
- abort();
- }
-
- the_insn = pseudo[0];
- /* check for expanded opcode after branch or in dual */
- if (no_opcodes > 1 && last_expand == TRUE)
- 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.X_add_symbol,
- the_insn.exp.X_subtract_symbol,
- the_insn.exp.X_add_number,
- 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 = FALSE;
- 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_warn("Unknown opcode: `%s'", str);
- exit(1);
- }
-
- 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_warn("Unknown opcode: `%s'", str);
- return;
- }
- if (comma) {
- *--s = ',';
- }
- argsStart = s;
- for (;;) {
- opcode = insn->match;
- bzero(&the_insn, 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 = TRUE;
- }
- 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 */
- bzero(&the_insn, sizeof(the_insn));
- if ( !getExpression(s)) {
- s = expr_end;
- if (the_insn.exp.X_add_number & ~0x1f)
- as_warn("5-bit immediate too large");
- opcode |= (the_insn.exp.X_add_number & 0x1f) << 11;
- bzero(&the_insn, sizeof(the_insn));
- the_insn.reloc = NO_RELOC;
- continue;
- }
- break;
-
- case 'l': /* 26 bit immediate, relative branch */
- the_insn.reloc = BRADDR;
- the_insn.pcrel = TRUE;
- goto immediate;
-
- case 's': /* 16 bit immediate, split relative branch */
- /* upper 5 bits of offset in dest field */
- the_insn.pcrel = TRUE;
- 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:
- abort();
- }
- break;
- }
- error:
- if (match == FALSE)
- {
- /* Args don't match. */
- if (&insn[1] - i860_opcodes < NUMOPCODES
- && !strcmp(insn->name, insn[1].name))
- {
- ++insn;
- s = argsStart;
- continue;
- }
- else
- {
- as_warn("Illegal operands");
- return;
- }
- }
- break;
- }
-
- the_insn.opcode = opcode;
- return;
- }
-
- static int
- getExpression(str)
- char *str;
- {
- char *save_in;
- segT seg;
-
- save_in = input_line_pointer;
- input_line_pointer = str;
- switch (seg = expression(&the_insn.exp)) {
-
- case SEG_ABSOLUTE:
- case SEG_TEXT:
- case SEG_DATA:
- case SEG_BSS:
- case SEG_UNKNOWN:
- case SEG_DIFFERENCE:
- case SEG_BIG:
- case SEG_NONE:
- break;
-
- default:
- 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 ""; /* Someone should teach Dean about null pointers */
- }
-
- /*
- * Write out big-endian.
- */
- void
- md_number_to_chars(buf,val,n)
- char *buf;
- long val;
- int n;
- {
- switch(n) {
-
- case 4:
- *buf++ = val >> 24;
- *buf++ = val >> 16;
- case 2:
- *buf++ = val >> 8;
- case 1:
- *buf = val;
- break;
-
- default:
- abort();
- }
- return;
- }
-
- void
- md_number_to_imm(buf,val,n, fixP, seg_type)
- char *buf;
- long val;
- int n;
- fixS *fixP;
- int seg_type;
- {
- 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 != TRUE)
- as_warn("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_warn("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_warn("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_warn("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 == TRUE)
- val >>= 2; /* align pcrel offset, see manual */
- /* check for bounds */
- if (highlow != PAIR && (val >= (1 << 16) || val < -(1 << 15)))
- as_warn("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_warn("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_warn("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_warn("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_warn("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_warn("16-bit immediate overflow: 0x%08x", val);
- buf[2] = val >> 8;
- buf[3] |= val; /* perserve bottom opcode bits */
- break;
-
- case NO_RELOC:
- default:
- as_warn("bad relocation type: 0x%02x", reloc);
- break;
- }
- return;
- }
-
- /* should never be called for i860 */
- void
- md_create_short_jump(ptr, from_addr, to_addr, frag, to_symbol)
- char *ptr;
- long from_addr, to_addr;
- {
- fprintf(stderr, "i860_create_short_jmp\n");
- abort();
- }
-
- /* should never be called for i860 */
- void
- md_number_to_disp(buf,val,n)
- char *buf;
- long val;
- {
- fprintf(stderr, "md_number_to_disp\n");
- abort();
- }
-
- /* should never be called for i860 */
- void
- md_number_to_field(buf,val,fix)
- char *buf;
- long val;
- void *fix;
- {
- fprintf(stderr, "i860_number_to_field\n");
- abort();
- }
-
- /* 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 int 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... */
- bcopy (the_bytes, (char *)ri_p, sizeof(*ri_p));
- #endif
- }
-
- /* should never be called for i860 */
- void
- md_convert_frag(fragP)
- register fragS *fragP;
- {
- fprintf(stderr, "i860_convert_frag\n");
- abort();
- }
-
- /* should never be called for i860 */
- void
- md_create_long_jump(ptr, from_addr, to_addr, frag, to_symbol)
- char *ptr;
- long from_addr,
- to_addr;
- fragS *frag;
- symbolS *to_symbol;
- {
- fprintf(stderr, "i860_create_long_jump\n");
- abort();
- }
-
- /* should never be called for i860 */
- int
- md_estimate_size_before_relax(fragP, segtype)
- register fragS *fragP;
- {
- fprintf(stderr, "i860_estimate_size_before_relax\n");
- abort();
- return 0;
- }
-
- /* 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 ?
- (insn->exp.X_add_symbol->sy_name ?
- insn->exp.X_add_symbol->sy_name : "???") : "0");
- fprintf(stderr, "\t\tX_sub_symbol = %s\n",
- insn->exp.X_subtract_symbol ?
- (insn->exp.X_subtract_symbol->sy_name ?
- insn->exp.X_subtract_symbol->sy_name : "???") : "0");
- fprintf(stderr, "\t\tX_add_number = %d\n",
- insn->exp.X_add_number);
- fprintf(stderr, "}\n");
- return;
- }
-
- int
- md_parse_option(argP,cntP,vecP)
- char **argP;
- int *cntP;
- char ***vecP;
- {
- return 1;
- }
-
- /*
- * I860 relocations are completely different, so it needs
- * this machine dependent routine to emit them.
- */
- void
- emit_relocations(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;
-
- bzero((char *) &ri, sizeof(ri));
- for (; fixP; fixP = fixP->fx_next) {
-
- if (fixP->fx_r_type & ~0x3f) {
- fprintf(stderr, "fixP->fx_r_type = %d\n", fixP->fx_r_type);
- abort();
- }
- 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 ((symbolP->sy_type & N_TYPE) == N_UNDF) {
- ri.r_extern = 1;
- ri.r_symbolnum = symbolP->sy_number;
- } else {
- ri.r_extern = 0;
- ri.r_symbolnum = symbolP->sy_type & N_TYPE;
- }
- 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));
- }
- }
- return;
- }
-
-