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- /* tc-sparc.c -- Assemble for the SPARC
- Copyright (C) 1989, 1990, 1991, 1992 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 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, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- /* relocation type for internal assembler use only */
- #define SPARC_RELOC_13 (127)
- #define SPARC_RELOC_22 (126)
- #define SPARC_RELOC_NONE (125)
-
- #define cypress 1234
-
- #undef DEBUGINSN
-
- #include <stdio.h>
- #include <ctype.h>
- #include "as.h"
- #include "libc.h"
- #include "md.h"
- #include "messages.h"
- #include "symbols.h"
- #include "sections.h"
-
- /* careful, this file includes data *declarations* */
- #include "sparc-opcode.h"
- #include <mach-o/sparc/reloc.h>
-
- /* From GNU ansidecl.h */
- #define PARAMS(paramlist) paramlist
-
- typedef long offsetT;
-
- /*
- * These are the default cputype and cpusubtype for the Sparc architecture.
- */
- const cpu_type_t md_cputype = CPU_TYPE_SPARC;
- cpu_subtype_t md_cpusubtype = CPU_SUBTYPE_SPARC_ALL;
-
- /* This is the byte sex for the Sparc architecture */
- const enum byte_sex md_target_byte_sex = BIG_ENDIAN_BYTE_SEX;
-
- /* These characters start a comment anywhere on the line */
- const char md_comment_chars[] = ";!";
-
- /* These characters only start a comment at the beginning of a line */
- const char md_line_comment_chars[] = "#";
-
- /*
- * These characters can be used to separate mantissa decimal digits from
- * exponent decimal digits in floating point numbers.
- */
- const char md_EXP_CHARS[] = "eE";
-
- /*
- * The characters after a leading 0 that means this number is a floating point
- * constant as in 0f123.456 or 0d1.234E-12 (see md_EXP_CHARS above).
- */
- const char md_FLT_CHARS[] = "dDfF";
-
- static void sparc_ip PARAMS ((char *));
-
- static enum sparc_architecture current_architecture = v6;
- static int architecture_requested;
- static int warn_on_bump;
-
- const relax_typeS md_relax_table[1];
-
- /* handle of the OPCODE hash table */
- static struct hash_control *op_hash = NULL;
-
- #ifdef NeXT
- static void s_proc PARAMS ((int));
- static void s_ignore PARAMS ((int));
- extern void s_seg PARAMS ((int));
- #else NeXT
- static void s_data1 PARAMS ((void));
- static void s_seg PARAMS ((int));
- static void s_proc PARAMS ((int));
- static void s_reserve PARAMS ((int));
- static void s_common PARAMS ((int));
- #endif NeXT
-
- const pseudo_typeS md_pseudo_table[] =
- {
- #ifdef NeXT
- {"global", s_globl, 0}, /* Maybe we should fix compiler to use globl */
- {"proc", s_proc, 0}, /* nop??? */
- /* These are to handle SUN assembler files and point to existing handlers */
- {"empty", s_ignore, 0},
- {"ident", s_ignore, 0},
- {"optim", s_ignore, 0},
- {"skip", s_space, 0},
- {"type", s_ignore, 0},
- {"word", cons, 4},
- {"half", cons, 2},
- /* these are custom handlers for SUN SPARC assembler only */
-
- #else NeXT
- {"seg", s_seg, 0},
- {"align", s_align_bytes, 0}, /* Defaulting is invalid (0) */
- {"common", s_common, 0},
- {"global", s_globl, 0},
- {"half", cons, 2},
- {"optim", s_ignore, 0},
- {"proc", s_proc, 0},
- {"reserve", s_reserve, 0},
- {"seg", s_seg, 0},
- {"skip", s_space, 0},
- {"word", cons, 4},
- #endif NeXT
- {NULL, 0, 0},
- };
-
- const int md_short_jump_size = 4;
- const int md_long_jump_size = 4;
- const int md_reloc_size = 12; /* Size of relocation record */
-
- /* This array holds the chars that always start a comment. If the
- pre-processor is disabled, these aren't very useful */
- const 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 comments started like this one will always
- work if '/' isn't otherwise defined. */
- const char line_comment_chars[] = "#";
-
- 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 */
- /* or 0d1.2345e12 */
- const 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. */
-
- static unsigned char octal[256];
- #define isoctal(c) octal[(unsigned char) (c)]
- static unsigned char toHex[256];
-
- struct sparc_it
- {
- char *error;
- unsigned long opcode;
- struct nlist *nlistp;
- expressionS exp;
- int pcrel;
- char pcrel_reloc; /* do relocation? */
- enum reloc_type_sparc reloc;
- };
-
- struct sparc_it the_insn;
-
- #ifdef DEBUGINSN
- static void print_insn PARAMS ((struct sparc_it *insn));
- #endif
- static int getExpression PARAMS ((char *str));
-
- static char *expr_end;
-
-
- /*
- * Indicates a 'set' instruction which may require a either
- * of the following instructions depending on the size of the
- * value argument:
- *
- * sethi %hi(value),reg
- *
- * or %g0,value,reg
- *
- * sethi %hi(value),reg
- * or reg,%lo(value),reg
- *
- */
- static int special_case_set = 0;
-
- /* s_proc and s_ignore are included for rudimentary
- compatibility with the Sun assembler only */
-
- static void
- s_proc (ignore)
- int ignore;
- {
- totally_ignore_line();
- }
-
- /* we simply ignore the rest of this statement */
- static void
- s_ignore (ignore)
- int ignore;
- {
- totally_ignore_line();
- }
-
- /* 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 const char *retval = NULL;
- int lose = 0;
- register unsigned int i = 0;
-
- op_hash = hash_new ();
-
- while (i < NUMOPCODES)
- {
- const char *name = sparc_opcodes[i].name;
- retval = hash_insert (op_hash, (char *)name, (char *)&sparc_opcodes[i]);
-
- if(retval != NULL && *retval != '\0') {
- fprintf (stderr, "internal error: can't hash `%s': %s\n",
- sparc_opcodes[i].name, retval);
- lose = 1;
- } do {
- if (sparc_opcodes[i].match & sparc_opcodes[i].lose)
- {
- fprintf (stderr, "internal error: losing opcode: `%s' \"%s\"\n",
- sparc_opcodes[i].name, sparc_opcodes[i].args);
- lose = 1;
- }
- ++i;
- }
- while (i < NUMOPCODES
- && !strcmp (sparc_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(
- void)
- {
- return;
- }
-
- void
- md_assemble (str)
- char *str;
- {
- char *toP;
- int rsd;
-
- know (str);
- sparc_ip (str);
-
- #ifdef DEBUGINSN
- print_insn(&the_insn);
- #endif
-
- /* See if "set" operand is absolute and small; skip sethi if so. */
- if (special_case_set && the_insn.exp.X_seg == SEG_ABSOLUTE)
- {
- if (the_insn.exp.X_add_number >= -(1 << 12)
- && the_insn.exp.X_add_number < (1 << 12))
- {
- the_insn.opcode = 0x80102000 /* or %g0,imm,... */
- | (the_insn.opcode & 0x3E000000) /* dest reg */
- | (the_insn.exp.X_add_number & 0x1FFF); /* imm */
- special_case_set = 0; /* No longer special */
- the_insn.reloc = SPARC_RELOC_NONE; /* No longer relocated */
- }
- }
-
- #ifdef NeXT /* mark sections containing instructions */
- /*
- * We are putting a machine instruction in this section so mark it as
- * containg some machine instructions.
- */
- frchain_now->frch_section.flags |= S_ATTR_SOME_INSTRUCTIONS;
- #endif /* NeXT */
-
- toP = frag_more (4);
- /* put out the opcode */
- md_number_to_chars (toP, (valueT) the_insn.opcode, 4);
-
- /* put out the symbol-dependent stuff */
- if (the_insn.reloc != SPARC_RELOC_NONE)
- {
- fix_new(frag_now,
- (toP - frag_now->fr_literal),
- 4,
- the_insn.exp.X_add_symbol,
- the_insn.exp.X_subtract_symbol,
- the_insn.exp.X_add_number,
- the_insn.pcrel,
- the_insn.pcrel_reloc, /* 1 for local labels due to scatter loading */
- the_insn.reloc);
- }
-
- if (special_case_set) {
- special_case_set = 0;
- assert (the_insn.reloc == SPARC_RELOC_HI22);
- /* See if "set" operand has no low-order bits; skip OR if so. */
- if ((the_insn.exp.X_seg == SEG_ABSOLUTE) &&
- ((the_insn.exp.X_add_number & 0x3FF) == 0))
- return;
-
- toP = frag_more (4);
- rsd = (the_insn.opcode >> 25) & 0x1f;
- the_insn.opcode = 0x80102000 | (rsd << 25) | (rsd << 14);
- md_number_to_chars (toP, (valueT) the_insn.opcode, 4);
- the_insn.pcrel_reloc = 0;
-
- fix_new(frag_now,
- (toP - frag_now->fr_literal),
- 4,
- the_insn.exp.X_add_symbol,
- the_insn.exp.X_subtract_symbol,
- the_insn.exp.X_add_number,
- the_insn.pcrel,
- the_insn.pcrel_reloc,
- SPARC_RELOC_LO10);
- return;
- }
- }
-
- static void
- sparc_ip (str)
- char *str;
- {
- char *error_message = "";
- char *s;
- const char *args;
- char c;
- struct sparc_opcode *insn;
- char *argsStart;
- unsigned long opcode;
- unsigned int mask = 0;
- int match = 0;
- int comma = 0;
- long immediate_max = 0;
-
- for (s = str; islower (*s) || (*s >= '0' && *s <= '3'); ++s)
- ;
- switch (*s)
- {
-
- case '\0':
- break;
-
- case ',':
- comma = 1;
-
- /*FALLTHROUGH */
-
- case ' ':
- *s++ = '\0';
- break;
-
- default:
- as_bad ("Unknown opcode: `%s'", str);
- exit (1);
- }
- if ((insn = (struct sparc_opcode *) hash_find (op_hash, str)) == NULL)
- {
- 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 = SPARC_RELOC_NONE;
- the_insn.pcrel_reloc = 1; /* default, reloc, for scatter loading */
-
- /*
- * Build the opcode, checking as we go to make
- * sure that the operands match
- */
- for (args = insn->args;; ++args)
- {
- switch (*args)
- {
- case 'M':
- case 'm':
- if (strncmp (s, "%asr", 4) == 0)
- {
- s += 4;
-
- if (isdigit (*s))
- {
- long num = 0;
-
- while (isdigit (*s))
- {
- num = num * 10 + *s - '0';
- ++s;
- }
-
- if (num < 16 || 31 < num)
- {
- error_message = ": asr number must be between 15 and 31";
- goto error;
- } /* out of range */
-
- opcode |= (*args == 'M' ? RS1 (num) : RD (num));
- continue;
- }
- else
- {
- error_message = ": expecting %asrN";
- goto error;
- } /* if %asr followed by a number. */
-
- } /* if %asr */
- break;
-
-
- case '\0': /* end of args */
- if (*s == '\0')
- {
- match = 1;
- }
- break;
-
- case '+':
- if (*s == '+')
- {
- ++s;
- continue;
- }
- if (*s == '-')
- {
- continue;
- }
- break;
-
- 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 'C': /* coprocessor state register */
- if (strncmp (s, "%csr", 4) == 0)
- {
- s += 4;
- continue;
- }
- break;
-
- case 'b': /* next operand is a coprocessor register */
- case 'c':
- case 'D':
- if (*s++ == '%' && *s++ == 'c' && isdigit (*s))
- {
- mask = *s++;
- if (isdigit (*s))
- {
- mask = 10 * (mask - '0') + (*s++ - '0');
- if (mask >= 32)
- {
- break;
- }
- }
- else
- {
- mask -= '0';
- }
- switch (*args)
- {
-
- case 'b':
- opcode |= mask << 14;
- continue;
-
- case 'c':
- opcode |= mask;
- continue;
-
- case 'D':
- opcode |= mask << 25;
- continue;
- }
- }
- break;
-
- case 'r': /* next operand must be a register */
- case 'u':
- case '1':
- case '2':
- case 'd':
- if (*s++ == '%')
- {
- switch (c = *s++)
- {
-
- case 'f': /* frame pointer */
- if (*s++ == 'p')
- {
- mask = 0x1e;
- break;
- }
- error_message = ": register not fp";
- goto error;
-
- case 'g': /* global register */
- if (isoctal (c = *s++))
- {
- mask = c - '0';
- break;
- }
- error_message = ": invalid global register";
- goto error;
-
- case 'i': /* in register */
- if (isoctal (c = *s++))
- {
- mask = c - '0' + 24;
- break;
- }
- error_message = ": invalid in register";
- goto error;
-
- case 'l': /* local register */
- if (isoctal (c = *s++))
- {
- mask = (c - '0' + 16);
- break;
- }
- error_message = ": invalid local register";
- goto error;
-
- case 'o': /* out register */
- if (isoctal (c = *s++))
- {
- mask = (c - '0' + 8);
- break;
- }
- error_message = ": invalid out register";
- goto error;
-
- case 's': /* stack pointer */
- if (*s++ == 'p')
- {
- mask = 0xe;
- break;
- }
- error_message = ": register is not sp";
- goto error;
-
- case 'r': /* any register */
- if (!isdigit (c = *s++))
- {
- error_message = ": invalid register";
- goto error;
- }
- /* FALLTHROUGH */
- case '0':
- case '1':
- case '2':
- case '3':
- case '4':
- case '5':
- case '6':
- case '7':
- case '8':
- case '9':
- if (isdigit (*s))
- {
- if ((c = 10 * (c - '0') + (*s++ - '0')) >= 32)
- {
- error_message = ": register # out of range";
- goto error;
- }
- }
- else
- {
- c -= '0';
- }
- mask = c;
- break;
-
- default:
- error_message = ": invalid resgiter #";
- goto error;
- }
- /*
- * Got the register, now figure out where
- * it goes in the opcode.
- */
- switch (*args)
- {
-
- case '1':
- opcode |= mask << 14;
- continue;
-
- case '2':
- opcode |= mask;
- continue;
-
- case 'd':
- opcode |= mask << 25;
- continue;
-
- case 'r':
- opcode |= (mask << 25) | (mask << 14);
- continue;
-
- case 'u':
- opcode |= (mask << 25) | mask;
- continue;
- }
- }
- break;
-
- case 'e': /* next operand is a floating point register */
- case 'v':
- case 'V':
-
- case 'f':
- case 'B':
- case 'R':
-
- case 'g':
- case 'H':
- case 'J':
- {
- char format;
-
- if (*s++ == '%'
- && ((format = *s) == 'f')
- && isdigit (*++s))
- {
- for (mask = 0; isdigit (*s); ++s)
- {
- mask = 10 * mask + (*s - '0');
- } /* read the number */
-
- if ((*args == 'v'
- || *args == 'B'
- || *args == 'H')
- && (mask & 1))
- {
- break;
- } /* register must be even numbered */
-
- if ((*args == 'V'
- || *args == 'R'
- || *args == 'J')
- && (mask & 3))
- {
- break;
- } /* register must be multiple of 4 */
-
- if (mask >= 32)
- {
- error_message = ": There are only 32 f registers; [0-31]";
- goto error;
- } /* on error */
- }
- else
- {
- break;
- } /* if not an 'f' register. */
-
- switch (*args)
- {
-
- case 'v':
- case 'V':
- case 'e':
- opcode |= RS1 (mask);
- continue;
-
-
- case 'f':
- case 'B':
- case 'R':
- opcode |= RS2 (mask);
- continue;
-
- case 'g':
- case 'H':
- case 'J':
- opcode |= RD (mask);
- continue;
- } /* pack it in. */
-
- know (0);
- break;
- } /* float arg */
-
- case 'F':
- if (strncmp (s, "%fsr", 4) == 0)
- {
- s += 4;
- continue;
- }
- break;
-
- case 'h': /* high 22 bits */
- the_insn.reloc = SPARC_RELOC_HI22;
- goto immediate;
-
- case 'l': /* 22 bit PC relative immediate */
- the_insn.reloc = SPARC_RELOC_WDISP22;
- the_insn.pcrel = 1;
- goto immediate;
-
- case 'L': /* 30 bit immediate for call insn */
- the_insn.reloc = SPARC_RELOC_WDISP30;
- the_insn.pcrel = 1;
- goto immediate;
-
- case 'n': /* 22 bit immediate */
- the_insn.reloc = SPARC_RELOC_22;
- goto immediate;
-
- case 'i': /* 13 bit immediate */
- /* What's the difference between base13 and 13?
- 13-bit immediate and 13-bit immediate+register */
- the_insn.reloc = SPARC_RELOC_13;
- immediate_max = 0x1FFF;
-
- /*FALLTHROUGH */
-
- immediate:
- if (*s == ' ')
- s++;
- if (*s == '%')
- {
- if ((c = s[1]) == 'h' && s[2] == 'i')
- {
- the_insn.reloc = SPARC_RELOC_HI22;
- s += 3;
- }
- else if (c == 'l' && s[2] == 'o')
- {
- the_insn.reloc = SPARC_RELOC_LO10;
- s += 3;
- }
- else
- break;
- }
- /* 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. */
- {
- /* This stuff checks to see if the expression ends in
- +%reg. If it does, it removes the register from
- the expression, and re-sets 's' to point to the
- right place. */
-
- char *s1;
-
- for (s1 = s; *s1 && *s1 != ',' && *s1 != ']'; s1++);
-
- if (s1 != s && isdigit (s1[-1]))
- {
- if (s1[-2] == '%' && s1[-3] == '+')
- {
- s1 -= 3;
- *s1 = '\0';
- (void) getExpression (s);
- *s1 = '+';
- s = s1;
- continue;
- }
- else if (strchr ("goli0123456789",
- s1[-2]) && s1[-3] == '%' && s1[-4] == '+')
- {
- s1 -= 4;
- *s1 = '\0';
- (void) getExpression (s);
- *s1 = '+';
- s = s1;
- continue;
- }
- }
- }
- (void) getExpression (s);
- s = expr_end;
- /* The Next linker has the ability to scatter blocks of sections between
- * labels. This requires that branches to labels that survive to the
- * link phase be relocatable. These labels are those that are not L*
- */
- if (the_insn.exp.X_add_symbol != NULL && !flagseen['L']
- && the_insn.exp.X_add_symbol->sy_nlist.n_un.n_name[0] == 'L') {
- /* local symbol which will be thrown away. Don't bother
- * to reloc it.
- */
- the_insn.pcrel_reloc = 0;
- }
-
- if ((the_insn.exp.X_seg == SEG_ABSOLUTE ||
- the_insn.exp.X_seg == SEG_BIG)
- && the_insn.exp.X_add_symbol == 0)
- {
-
- /* Check for invalid constant values. Don't warn if
- constant was inside %hi or %lo, since these
- truncate the constant to fit. */
- if (immediate_max != 0
- && the_insn.reloc != SPARC_RELOC_LO10
- && the_insn.reloc != SPARC_RELOC_HI22
- && (the_insn.exp.X_add_number > immediate_max
- || the_insn.exp.X_add_number < ~immediate_max))
- as_bad ("constant value must be between %ld and %ld",
- ~immediate_max, immediate_max);
-
- if ((the_insn.reloc == SPARC_RELOC_WDISP22 ||
- the_insn.reloc == SPARC_RELOC_WDISP30) &&
- the_insn.exp.X_add_number & 3)
- as_bad ("displacement is not long aligned");
-
- /* plug absolutes directly into opcode */
-
- switch(the_insn.reloc) {
- case SPARC_RELOC_13:
- if (the_insn.exp.X_seg == SEG_BIG)
- opcode |= (*(int *) generic_bignum) & 0x1fff;
- else
- opcode |= the_insn.exp.X_add_number & 0x1fff;
- the_insn.reloc = SPARC_RELOC_NONE;
- break;
- case SPARC_RELOC_22:
- if (the_insn.exp.X_seg == SEG_BIG)
- opcode |= (*(int *) generic_bignum) & 0x3fffff;
- else
- opcode |= the_insn.exp.X_add_number & 0x3fffff;
- the_insn.reloc = SPARC_RELOC_NONE;
- break;
- case SPARC_RELOC_HI22:
- /* extract upper 22 bits from constant */
- opcode |= (the_insn.exp.X_add_number >> 10) & 0x3fffff;
- the_insn.reloc = SPARC_RELOC_NONE;
- break;
- case SPARC_RELOC_LO10:
- opcode |= the_insn.exp.X_add_number & 0x3ff;
- break;
-
- /* the PC relative displacements are plugged in
- if the argument is absolute, but retain
- relocatability */
- case SPARC_RELOC_WDISP22:
- opcode |= (the_insn.exp.X_add_number >> 2) & 0x3fffff;
- break;
- case SPARC_RELOC_WDISP30:
- opcode |= (the_insn.exp.X_add_number >> 2) & 0x3fffffff;
- break;
- default:
- printf("Unknown reloc entry\n");
- }
- }
-
- /* Reset to prevent extraneous range check. */
- immediate_max = 0;
-
- continue;
-
- case 'a':
- if (*s++ == 'a')
- {
- opcode |= ANNUL;
- continue;
- }
- break;
-
- case 'A':
- {
- char *push = input_line_pointer;
- expressionS e;
-
- input_line_pointer = s;
-
- expression (&e);
-
- if (e.X_seg == SEG_ABSOLUTE)
- {
- opcode |= e.X_add_number << 5;
- s = input_line_pointer;
- input_line_pointer = push;
- continue;
- } /* if absolute */
-
- break;
- } /* alternate space */
-
- case 'p':
- if (strncmp (s, "%psr", 4) == 0)
- {
- s += 4;
- continue;
- }
- break;
-
- case 'q': /* floating point queue */
- if (strncmp (s, "%fq", 3) == 0)
- {
- s += 3;
- continue;
- }
- break;
-
- case 'Q': /* coprocessor queue */
- if (strncmp (s, "%cq", 3) == 0)
- {
- s += 3;
- continue;
- }
- break;
-
- case 'S':
- if (strcmp (str, "set") == 0)
- {
- special_case_set = 1;
- continue;
- }
- break;
-
-
- case 't':
- if (strncmp (s, "%tbr", 4) != 0)
- break;
- s += 4;
- continue;
-
- case 'w':
- if (strncmp (s, "%wim", 4) != 0)
- break;
- s += 4;
- continue;
-
- case 'y':
- if (strncmp (s, "%y", 2) != 0)
- break;
- s += 2;
- continue;
-
- default:
- as_fatal ("failed sanity check.");
- } /* switch on arg code */
- break;
- } /* for each arg that we expect */
- error:
- if (match == 0)
- {
- /* Args don't match. */
- if (((unsigned) (&insn[1] - sparc_opcodes)) < NUMOPCODES
- && !strcmp (insn->name, insn[1].name))
- {
- ++insn;
- s = argsStart;
- continue;
- }
- else
- {
- as_bad ("Illegal operands%s", error_message);
- return;
- }
- }
- else
- {
- if (insn->architecture > current_architecture)
- {
- if ((!architecture_requested || warn_on_bump)
- &&
- 1
- )
- {
- if (warn_on_bump)
- {
- as_warn ("architecture bumped from \"%s\" to \"%s\" on \"%s\"",
- architecture_pname[current_architecture],
- architecture_pname[insn->architecture],
- str);
- } /* if warning */
-
- current_architecture = insn->architecture;
- }
- else
- {
- as_bad ("architecture mismatch on \"%s\" (\"%s\"). current architecture is \"%s\"",
- str,
- architecture_pname[insn->architecture],
- architecture_pname[current_architecture]);
- return;
- } /* if bump ok else error */
- } /* if architecture higher */
- } /* if no match */
-
- break;
- } /* forever looking for a match */
-
- 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 != SEG_ABSOLUTE
- && seg != SEG_SECT
- && seg != SEG_DIFFSECT
- && seg != SEG_UNKNOWN
- && seg != SEG_NONE
- && seg != SEG_BIG) {
- 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;
- } /* getExpression() */
-
-
- /*
- 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, (valueT) (*wordP++), sizeof (LITTLENUM_TYPE));
- litP += sizeof (LITTLENUM_TYPE);
- }
- return "";
- }
-
- /*
- * Write out big-endian.
- */
- void
- md_number_to_chars (buf, val, n)
- char *buf;
- long val;
- int n;
- {
- // sigh, all architectures do this..,
- switch(n) {
-
- case 4:
- *buf++ = val >> 24;
- *buf++ = val >> 16;
- case 2:
- *buf++ = val >> 8;
- case 1:
- *buf = val;
- break;
-
- default:
- abort();
- }
- }
-
- /* Apply a fixS to the frags, now that we know the value it ought to
- hold. */
-
-
- void
- md_number_to_imm(unsigned char *buf, long val, int size, fixS *fixP, int nsect)
- {
-
- /* handle the most common case quickly */
- if ((fixP->fx_r_type == NO_RELOC) ||
- (fixP->fx_r_type == SPARC_RELOC_NONE) ||
- (fixP->fx_r_type == SPARC_RELOC_VANILLA)) {
- switch(size){
- case 4:
- *buf++ = val >> 24;
- *buf++ = val >> 16;
- case 2:
- *buf++ = val >> 8;
- case 1:
- *buf = val;
- break;
- default:
- abort();
- }
- return;
- }
-
- switch (fixP->fx_r_type) {
- case SPARC_RELOC_WDISP30:
- val = (val >> 2) + 1; /* adjust for word displacement */
- buf[0] |= (val >> 24) & 0x3f;
- buf[1] = (val >> 16);
- buf[2] = val >> 8;
- buf[3] = val;
- break;
- case SPARC_RELOC_WDISP22:
- val = (val >>= 2) + 1;
- buf[1] |= (val >> 16) & 0x3f;
- buf[2] = val >> 8;
- buf[3] = val;
- break;
- case SPARC_RELOC_HI22:
- buf[1] |= (val >> 26) & 0x3f;
- buf[2] = val >> 18;
- buf[3] = val >> 10;
- break;
- case SPARC_RELOC_LO10:
- buf[2] |= (val >> 8) & 0x03;
- buf[3] = val;
- break;
-
- /* special cases that need to be handled internally by the as */
- case SPARC_RELOC_22:
- if (!fixP->fx_addsy) {
- if (val & ~0x003fffff) {
- as_bad ("relocation overflow");
- } /* on overflow */
- buf[1] |= (val >> 16) & 0x3f;
- buf[2] = val >> 8;
- buf[3] = val & 0xff;
- } else
- as_bad ("Undefined symbolic 22-bit immediate reference: %s",
- fixP->fx_addsy->sy_name);
- break;
- case SPARC_RELOC_13:
- if (!fixP->fx_addsy) {
- if (((val > 0) && (val & ~(offsetT)0x00001fff))
- || ((val < 0) && (~(val - 1) & ~(offsetT)0x00001fff))) {
- as_bad ("relocation overflow");
- }
- buf[2] |= (val >> 8) & 0x1f;
- buf[3] = val;
- } else
- as_bad ("Undefined symbolic 13-bit immediate reference: %s",
- fixP->fx_addsy->sy_name);
- break;
- case SPARC_RELOC_NONE:
- default:
- as_bad ("bad or unhandled relocation type: 0x%02x", fixP->fx_r_type);
- break;
- }
- }
-
-
- /*
- * md_parse_option
- * Invocation line includes a switch not recognized by the base assembler.
- * See if it's a processor-specific option. These are:
- *
- * -bump
- * Warn on architecture bumps. See also -A.
- *
- * -Av6, -Av7, -Av8, -Asparclite
- * Select the architecture. Instructions or features not
- * supported by the selected architecture cause fatal errors.
- *
- * The default is to start at v6, and bump the architecture up
- * whenever an instruction is seen at a higher level.
- *
- * If -bump is specified, a warning is printing when bumping to
- * higher levels.
- *
- * If an architecture is specified, all instructions must match
- * that architecture. Any higher level instructions are flagged
- * as errors.
- *
- * if both an architecture and -bump are specified, the
- * architecture starts at the specified level, but bumps are
- * warnings.
- *
- */
-
- int
- md_parse_option (argP, cntP, vecP)
- char **argP;
- int *cntP;
- char ***vecP;
- {
- char *p;
- const char **arch;
-
- if (!strcmp (*argP, "bump"))
- {
- warn_on_bump = 1;
- }
- else if (**argP == 'A')
- {
- p = (*argP) + 1;
-
- for (arch = architecture_pname; *arch != NULL; ++arch)
- {
- if (strcmp (p, *arch) == 0)
- {
- break;
- } /* found a match */
- } /* walk the pname table */
-
- if (*arch == NULL)
- {
- as_bad ("unknown architecture: %s", p);
- }
- else
- {
- current_architecture = (enum sparc_architecture) (arch - architecture_pname);
- architecture_requested = 1;
- }
- }
- #ifndef NeXT
- #ifdef OBJ_ELF
- else if (**argP == 'V')
- {
- print_version_id ();
- }
- else if (**argP == 'Q')
- {
- /* Qy - do emit .comment
- Qn - do not emit .comment */
- }
- else if (**argP == 's')
- {
- /* use .stab instead of .stab.excl */
- }
- #endif
- else if (strcmp (*argP, "sparc") == 0)
- {
- /* Ignore -sparc, used by SunOS make default .s.o rule. */
- }
- #endif /* NeXT */
- else
- {
- /* Unknown option */
- (*argP)++;
- return 0;
- }
- **argP = '\0'; /* Done parsing this switch */
- return 1;
- } /* md_parse_option() */
-
-
- int
- md_estimate_size_before_relax(
- fragS *fragP,
- int segment_type)
- {
- as_fatal("internal error: Relaxation should never occur");
- return(0);
- }
-
- void
- md_convert_frag(
- fragS *fragP)
- {
- as_fatal("internal error: Relaxation should never occur");
- }
-
-
- #ifdef DEBUGINSN
-
- char *
- S_GET_NAME(sym)
- symbolS *sym;
- {
- return (sym->sy_nlist.n_un.n_name);
- }
-
- /* for debugging only */
- static void
- print_insn (insn)
- struct sparc_it *insn;
- {
- const char *const Reloc[] = {
- "VANILLA",
- "PAIR",
- "HI22",
- "LO10",
- "DISP22",
- "PCREL",
- "22",
- "13",
- "SECTDIFF",
- "HI22_SECTDIFF",
- "LO10_SECTDIFF",
- "NONE",
- "UNUSED"
- };
-
- const char *const InternalReloc[] = {
- "13",
- "22"
- };
-
- if (insn->error)
- fprintf (stderr, "ERROR: %s\n", insn->error);
- fprintf (stderr, "opcode=0x%08x\n", (unsigned int)insn->opcode);
- if (insn->reloc >= 127)
- fprintf (stderr, "internal reloc = %s\n", InternalReloc[insn->reloc-127]);
- else
- fprintf (stderr, "reloc = %s\n", Reloc[insn->reloc]);
- fprintf (stderr, "X_add_number = 0x%x\n",
- insn->exp.X_add_number);
-
- if (insn->exp.X_add_symbol != NULL)
- fprintf(stderr, "Add symbol: %s\n", S_GET_NAME(insn->exp.X_add_symbol));
- if (insn->exp.X_subtract_symbol != NULL)
- fprintf(stderr, "Subtract symbol: %s\n", S_GET_NAME(insn->exp.X_subtract_symbol));
- }
- #endif
-