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Diffstat (limited to 'gas/config/tc-d30v.c')
| -rw-r--r-- | gas/config/tc-d30v.c | 2237 |
1 files changed, 0 insertions, 2237 deletions
diff --git a/gas/config/tc-d30v.c b/gas/config/tc-d30v.c deleted file mode 100644 index 25c54124242..00000000000 --- a/gas/config/tc-d30v.c +++ /dev/null @@ -1,2237 +0,0 @@ -/* tc-d30v.c -- Assembler code for the Mitsubishi D30V - Copyright (C) 1997, 1998, 1999 Free Software Foundation. - - 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, 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include <stdio.h> -#include <ctype.h> -#include "as.h" -#include "subsegs.h" -#include "opcode/d30v.h" - -const char comment_chars[] = ";"; -const char line_comment_chars[] = "#"; -const char line_separator_chars[] = ""; -const char *md_shortopts = "OnNcC"; -const char EXP_CHARS[] = "eE"; -const char FLT_CHARS[] = "dD"; - -#if HAVE_LIMITS_H -#include <limits.h> -#endif - -#ifndef CHAR_BIT -#define CHAR_BIT 8 -#endif - -#define NOP_MULTIPLY 1 -#define NOP_ALL 2 -static int warn_nops = 0; -static int Optimizing = 0; -static int warn_register_name_conflicts = 1; - -#define FORCE_SHORT 1 -#define FORCE_LONG 2 - -/* EXEC types. */ -typedef enum _exec_type -{ - EXEC_UNKNOWN, /* no order specified */ - EXEC_PARALLEL, /* done in parallel (FM=00) */ - EXEC_SEQ, /* sequential (FM=01) */ - EXEC_REVSEQ /* reverse sequential (FM=10) */ -} exec_type_enum; - -/* fixups */ -#define MAX_INSN_FIXUPS (5) -struct d30v_fixup -{ - expressionS exp; - int operand; - int pcrel; - int size; - bfd_reloc_code_real_type reloc; -}; - -typedef struct _fixups -{ - int fc; - struct d30v_fixup fix[MAX_INSN_FIXUPS]; - struct _fixups *next; -} Fixups; - -static Fixups FixUps[2]; -static Fixups *fixups; - -/* Whether current and previous instruction are word multiply insns. */ -static int cur_mul32_p = 0; -static int prev_mul32_p = 0; - -/* The flag_explicitly_parallel is true iff the instruction being assembled - has been explicitly written as a parallel short-instruction pair by the - human programmer. It is used in parallel_ok() to distinguish between - those dangerous parallelizations attempted by the human, which are to be - allowed, and those attempted by the assembler, which are not. It is set - from md_assemble(). */ -static int flag_explicitly_parallel = 0; -static int flag_xp_state = 0; - -/* Whether current and previous left sub-instruction disables - execution of right sub-instruction. */ -static int cur_left_kills_right_p = 0; -static int prev_left_kills_right_p = 0; - -/* The known current alignment of the current section. */ -static int d30v_current_align; -static segT d30v_current_align_seg; - -/* The last seen label in the current section. This is used to auto-align - labels preceeding instructions. */ -static symbolS *d30v_last_label; - -/* Two nops */ -#define NOP_LEFT ((long long) NOP << 32) -#define NOP_RIGHT ((long long) NOP) -#define NOP2 (FM00 | NOP_LEFT | NOP_RIGHT) - -/* local functions */ -static int reg_name_search PARAMS ((char *name)); -static int register_name PARAMS ((expressionS *expressionP)); -static int check_range PARAMS ((unsigned long num, int bits, int flags)); -static int postfix PARAMS ((char *p)); -static bfd_reloc_code_real_type get_reloc PARAMS ((struct d30v_operand *op, int rel_flag)); -static int get_operands PARAMS ((expressionS exp[], int cmp_hack)); -static struct d30v_format *find_format PARAMS ((struct d30v_opcode *opcode, - expressionS ops[],int fsize, int cmp_hack)); -static long long build_insn PARAMS ((struct d30v_insn *opcode, expressionS *opers)); -static void write_long PARAMS ((struct d30v_insn *opcode, long long insn, Fixups *fx)); -static void write_1_short PARAMS ((struct d30v_insn *opcode, long long insn, - Fixups *fx, int use_sequential)); -static int write_2_short PARAMS ((struct d30v_insn *opcode1, long long insn1, - struct d30v_insn *opcode2, long long insn2, exec_type_enum exec_type, Fixups *fx)); -static long long do_assemble PARAMS ((char *str, struct d30v_insn *opcode, - int shortp, int is_parallel)); -static int parallel_ok PARAMS ((struct d30v_insn *opcode1, unsigned long insn1, - struct d30v_insn *opcode2, unsigned long insn2, - exec_type_enum exec_type)); -static void d30v_number_to_chars PARAMS ((char *buf, long long value, int nbytes)); -static void check_size PARAMS ((long value, int bits, char *file, int line)); -static void d30v_align PARAMS ((int, char *, symbolS *)); -static void s_d30v_align PARAMS ((int)); -static void s_d30v_text PARAMS ((int)); -static void s_d30v_data PARAMS ((int)); -static void s_d30v_section PARAMS ((int)); - -struct option md_longopts[] = { - {NULL, no_argument, NULL, 0} -}; -size_t md_longopts_size = sizeof(md_longopts); - - -/* The target specific pseudo-ops which we support. */ -const pseudo_typeS md_pseudo_table[] = -{ - { "word", cons, 4 }, - { "hword", cons, 2 }, - { "align", s_d30v_align, 0 }, - { "text", s_d30v_text, 0 }, - { "data", s_d30v_data, 0 }, - { "section", s_d30v_section, 0 }, - { "section.s", s_d30v_section, 0 }, - { "sect", s_d30v_section, 0 }, - { "sect.s", s_d30v_section, 0 }, - { NULL, NULL, 0 } -}; - -/* Opcode hash table. */ -static struct hash_control *d30v_hash; - -/* reg_name_search does a binary search of the pre_defined_registers - array to see if "name" is a valid regiter name. Returns the register - number from the array on success, or -1 on failure. */ - -static int -reg_name_search (name) - char *name; -{ - int middle, low, high; - int cmp; - - low = 0; - high = reg_name_cnt () - 1; - - do - { - middle = (low + high) / 2; - cmp = strcasecmp (name, pre_defined_registers[middle].name); - if (cmp < 0) - high = middle - 1; - else if (cmp > 0) - low = middle + 1; - else - { - if (symbol_find (name) != NULL) - { - if (warn_register_name_conflicts) - as_warn (_("Register name %s conflicts with symbol of the same name"), - name); - } - - return pre_defined_registers[middle].value; - } - } - while (low <= high); - - return -1; -} - -/* register_name() checks the string at input_line_pointer - to see if it is a valid register name. */ - -static int -register_name (expressionP) - expressionS *expressionP; -{ - int reg_number; - char c, *p = input_line_pointer; - - while (*p && *p!='\n' && *p!='\r' && *p !=',' && *p!=' ' && *p!=')') - p++; - - c = *p; - if (c) - *p++ = 0; - - /* look to see if it's in the register table */ - reg_number = reg_name_search (input_line_pointer); - if (reg_number >= 0) - { - expressionP->X_op = O_register; - /* temporarily store a pointer to the string here */ - expressionP->X_op_symbol = (symbolS *)input_line_pointer; - expressionP->X_add_number = reg_number; - input_line_pointer = p; - return 1; - } - if (c) - *(p-1) = c; - return 0; -} - - -static int -check_range (num, bits, flags) - unsigned long num; - int bits; - int flags; -{ - long min, max; - int retval=0; - - /* don't bother checking 32-bit values */ - if (bits == 32 && sizeof(unsigned long) * CHAR_BIT == 32) - return 0; - - /* Sign extend signed values to unsigned long */ - if ((flags & OPERAND_SIGNED) && (num & ((unsigned long)1 << (bits - 1)))) - num |= ((long)-1 << (bits - 1)); - - if (flags & OPERAND_SHIFT) - { - /* We know that all shifts are right by three bits.... */ - - if (flags & OPERAND_SIGNED) - num = (unsigned long) ( (long) num >= 0) - ? ( ((long) num) >> 3 ) - : ( (num >> 3) | ((unsigned long)-1 << (32 - 3)) ); - else - num >>= 3; - } - - if (flags & OPERAND_SIGNED) - { - max = ((unsigned long)1 << (bits - 1)) - 1; - min = - ((unsigned long)1 << (bits - 1)); - if (((long)num > max) || ((long)num < min)) - retval = 1; - } - else - { - max = ((unsigned long)1 << bits) - 1; - min = 0; - if ((num > max) || (num < min)) - retval = 1; - } - - return retval; -} - - -void -md_show_usage (stream) - FILE *stream; -{ - fprintf (stream, _("\nD30V options:\n\ --O Make adjacent short instructions parallel if possible.\n\ --n Warn about all NOPs inserted by the assembler.\n\ --N Warn about NOPs inserted after word multiplies.\n\ --c Warn about symbols whoes names match register names.\n\ --C Opposite of -C. -c is the default.\n")); -} - -int -md_parse_option (c, arg) - int c; - char *arg; -{ - switch (c) - { - /* Optimize. Will attempt to parallelize operations */ - case 'O': - Optimizing = 1; - break; - - /* Warn about all NOPS that the assembler inserts. */ - case 'n': - warn_nops = NOP_ALL; - break; - - /* Warn about the NOPS that the assembler inserts because of the - multiply hazard. */ - case 'N': - warn_nops = NOP_MULTIPLY; - break; - - case 'c': - warn_register_name_conflicts = 1; - break; - - case 'C': - warn_register_name_conflicts = 0; - break; - - default: - return 0; - } - return 1; -} - -symbolS * -md_undefined_symbol (name) - char *name; -{ - return 0; -} - -/* Turn a string in input_line_pointer into a floating point constant of type - type, and store the appropriate bytes in *litP. The number of LITTLENUMS - emitted is stored in *sizeP . An error message is returned, or NULL on OK. - */ -char * -md_atof (type, litP, sizeP) - int type; - char *litP; - int *sizeP; -{ - int prec; - LITTLENUM_TYPE words[4]; - char *t; - int i; - - switch (type) - { - case 'f': - prec = 2; - break; - case 'd': - prec = 4; - break; - default: - *sizeP = 0; - return _("bad call to md_atof"); - } - - t = atof_ieee (input_line_pointer, type, words); - if (t) - input_line_pointer = t; - - *sizeP = prec * 2; - - for (i = 0; i < prec; i++) - { - md_number_to_chars (litP, (valueT) words[i], 2); - litP += 2; - } - return NULL; -} - -void -md_convert_frag (abfd, sec, fragP) - bfd *abfd; - asection *sec; - fragS *fragP; -{ - abort (); -} - -valueT -md_section_align (seg, addr) - asection *seg; - valueT addr; -{ - int align = bfd_get_section_alignment (stdoutput, seg); - return ((addr + (1 << align) - 1) & (-1 << align)); -} - - -void -md_begin () -{ - struct d30v_opcode * opcode; - d30v_hash = hash_new (); - - /* Insert opcode names into a hash table. */ - for (opcode = (struct d30v_opcode *)d30v_opcode_table; opcode->name; opcode++) - hash_insert (d30v_hash, opcode->name, (char *) opcode); - - fixups = &FixUps[0]; - FixUps[0].next = &FixUps[1]; - FixUps[1].next = &FixUps[0]; - - d30v_current_align_seg = now_seg; -} - - -/* this function removes the postincrement or postdecrement - operator ( '+' or '-' ) from an expression */ - -static int postfix (p) - char *p; -{ - while (*p != '-' && *p != '+') - { - if (*p==0 || *p=='\n' || *p=='\r' || *p==' ' || *p==',') - break; - p++; - } - - if (*p == '-') - { - *p = ' '; - return (-1); - } - if (*p == '+') - { - *p = ' '; - return (1); - } - - return (0); -} - - -static bfd_reloc_code_real_type -get_reloc (op, rel_flag) - struct d30v_operand *op; - int rel_flag; -{ - switch (op->bits) - { - case 6: - if (op->flags & OPERAND_SHIFT) - return BFD_RELOC_D30V_9_PCREL; - else - return BFD_RELOC_D30V_6; - break; - case 12: - if (!(op->flags & OPERAND_SHIFT)) - as_warn (_("unexpected 12-bit reloc type")); - if (rel_flag == RELOC_PCREL) - return BFD_RELOC_D30V_15_PCREL; - else - return BFD_RELOC_D30V_15; - case 18: - if (!(op->flags & OPERAND_SHIFT)) - as_warn (_("unexpected 18-bit reloc type")); - if (rel_flag == RELOC_PCREL) - return BFD_RELOC_D30V_21_PCREL; - else - return BFD_RELOC_D30V_21; - case 32: - if (rel_flag == RELOC_PCREL) - return BFD_RELOC_D30V_32_PCREL; - else - return BFD_RELOC_D30V_32; - default: - return 0; - } -} - -/* get_operands parses a string of operands and returns - an array of expressions */ - -static int -get_operands (exp, cmp_hack) - expressionS exp[]; - int cmp_hack; -{ - char *p = input_line_pointer; - int numops = 0; - int post = 0; - - if (cmp_hack) - { - exp[numops].X_op = O_absent; - exp[numops++].X_add_number = cmp_hack - 1; - } - - while (*p) - { - while (*p == ' ' || *p == '\t' || *p == ',') - p++; - if (*p==0 || *p=='\n' || *p=='\r') - break; - - if (*p == '@') - { - p++; - exp[numops].X_op = O_absent; - if (*p == '(') - { - p++; - exp[numops].X_add_number = OPERAND_ATPAR; - post = postfix (p); - } - else if (*p == '-') - { - p++; - exp[numops].X_add_number = OPERAND_ATMINUS; - } - else - { - exp[numops].X_add_number = OPERAND_ATSIGN; - post = postfix (p); - } - numops++; - continue; - } - - if (*p == ')') - { - /* just skip the trailing paren */ - p++; - continue; - } - - input_line_pointer = p; - - /* check to see if it might be a register name */ - if (!register_name (&exp[numops])) - { - /* parse as an expression */ - expression (&exp[numops]); - } - - if (exp[numops].X_op == O_illegal) - as_bad (_("illegal operand")); - else if (exp[numops].X_op == O_absent) - as_bad (_("missing operand")); - - numops++; - p = input_line_pointer; - - switch (post) - { - case -1: /* postdecrement mode */ - exp[numops].X_op = O_absent; - exp[numops++].X_add_number = OPERAND_MINUS; - break; - case 1: /* postincrement mode */ - exp[numops].X_op = O_absent; - exp[numops++].X_add_number = OPERAND_PLUS; - break; - } - post = 0; - } - - exp[numops].X_op = 0; - return (numops); -} - -/* build_insn generates the instruction. It does everything */ -/* but write the FM bits. */ - -static long long -build_insn (opcode, opers) - struct d30v_insn *opcode; - expressionS *opers; -{ - int i, length, bits, shift, flags; - unsigned int number, id=0; - long long insn; - struct d30v_opcode *op = opcode->op; - struct d30v_format *form = opcode->form; - - insn = opcode->ecc << 28 | op->op1 << 25 | op->op2 << 20 | form->modifier << 18; - - for (i=0; form->operands[i]; i++) - { - flags = d30v_operand_table[form->operands[i]].flags; - - /* must be a register or number */ - if (!(flags & OPERAND_REG) && !(flags & OPERAND_NUM) && - !(flags & OPERAND_NAME) && !(flags & OPERAND_SPECIAL)) - continue; - - bits = d30v_operand_table[form->operands[i]].bits; - if (flags & OPERAND_SHIFT) - bits += 3; - - length = d30v_operand_table[form->operands[i]].length; - shift = 12 - d30v_operand_table[form->operands[i]].position; - if (opers[i].X_op != O_symbol) - number = opers[i].X_add_number; - else - number = 0; - if (flags & OPERAND_REG) - { - /* check for mvfsys or mvtsys control registers */ - if (flags & OPERAND_CONTROL && (number & 0x7f) > MAX_CONTROL_REG) - { - /* PSWL or PSWH */ - id = (number & 0x7f) - MAX_CONTROL_REG; - number = 0; - } - else if (number & OPERAND_FLAG) - { - id = 3; /* number is a flag register */ - } - number &= 0x7F; - } - else if (flags & OPERAND_SPECIAL) - { - number = id; - } - - if (opers[i].X_op != O_register && opers[i].X_op != O_constant && !(flags & OPERAND_NAME)) - { - /* now create a fixup */ - - if (fixups->fc >= MAX_INSN_FIXUPS) - as_fatal (_("too many fixups")); - - fixups->fix[fixups->fc].reloc = - get_reloc ((struct d30v_operand *)&d30v_operand_table[form->operands[i]], op->reloc_flag); - fixups->fix[fixups->fc].size = 4; - fixups->fix[fixups->fc].exp = opers[i]; - fixups->fix[fixups->fc].operand = form->operands[i]; - if (fixups->fix[fixups->fc].reloc == BFD_RELOC_D30V_9_PCREL) - fixups->fix[fixups->fc].pcrel = RELOC_PCREL; - else - fixups->fix[fixups->fc].pcrel = op->reloc_flag; - (fixups->fc)++; - } - - /* truncate to the proper number of bits */ - if ((opers[i].X_op == O_constant) && check_range (number, bits, flags)) - as_bad (_("operand out of range: %d"),number); - if (bits < 31) - number &= 0x7FFFFFFF >> (31 - bits); - if (flags & OPERAND_SHIFT) - number >>= 3; - if (bits == 32) - { - /* it's a LONG instruction */ - insn |= (number >> 26); /* top 6 bits */ - insn <<= 32; /* shift the first word over */ - insn |= ((number & 0x03FC0000) << 2); /* next 8 bits */ - insn |= number & 0x0003FFFF; /* bottom 18 bits */ - } - else - insn |= number << shift; - } - return insn; -} - - -/* write out a long form instruction */ -static void -write_long (opcode, insn, fx) - struct d30v_insn *opcode; - long long insn; - Fixups *fx; -{ - int i, where; - char *f = frag_more (8); - - insn |= FM11; - d30v_number_to_chars (f, insn, 8); - - for (i=0; i < fx->fc; i++) - { - if (fx->fix[i].reloc) - { - where = f - frag_now->fr_literal; - fix_new_exp (frag_now, - where, - fx->fix[i].size, - &(fx->fix[i].exp), - fx->fix[i].pcrel, - fx->fix[i].reloc); - } - } - fx->fc = 0; -} - - -/* Write out a short form instruction by itself. */ -static void -write_1_short (opcode, insn, fx, use_sequential) - struct d30v_insn *opcode; - long long insn; - Fixups *fx; - int use_sequential; -{ - char *f = frag_more (8); - int i, where; - - if (warn_nops == NOP_ALL) - as_warn (_("%s NOP inserted"), use_sequential ? - _("sequential") : _("parallel")); - - /* The other container needs to be NOP. */ - if (use_sequential) - { - /* Use a sequential NOP rather than a parallel one, - as the current instruction is a FLAG_MUL32 type one - and the next instruction is a load. */ - - /* According to 4.3.1: for FM=01, sub-instructions performed - only by IU cannot be encoded in L-container. */ - - if (opcode->op->unit == IU) - insn |= FM10 | NOP_LEFT; /* right then left */ - else - insn = FM01 | (insn << 32) | NOP_RIGHT; /* left then right */ - } - else - { - /* According to 4.3.1: for FM=00, sub-instructions performed - only by IU cannot be encoded in L-container. */ - - if (opcode->op->unit == IU) - insn |= FM00 | NOP_LEFT; /* right container */ - else - insn = FM00 | (insn << 32) | NOP_RIGHT; /* left container */ - } - - d30v_number_to_chars (f, insn, 8); - - for (i=0; i < fx->fc; i++) - { - if (fx->fix[i].reloc) - { - where = f - frag_now->fr_literal; - fix_new_exp (frag_now, - where, - fx->fix[i].size, - &(fx->fix[i].exp), - fx->fix[i].pcrel, - fx->fix[i].reloc); - } - } - fx->fc = 0; -} - -/* Write out a short form instruction if possible. - Return number of instructions not written out. */ -static int -write_2_short (opcode1, insn1, opcode2, insn2, exec_type, fx) - struct d30v_insn *opcode1, *opcode2; - long long insn1, insn2; - exec_type_enum exec_type; - Fixups *fx; -{ - long long insn = NOP2; - char *f; - int i,j, where; - - if (exec_type == EXEC_SEQ - && (opcode1->op->flags_used & (FLAG_JMP | FLAG_JSR)) - && ((opcode1->op->flags_used & FLAG_DELAY) == 0) - && ((opcode1->ecc == ECC_AL) || ! Optimizing)) - { - /* Unconditional, non-delayed branches kill instructions in - the right bin. Conditional branches don't always but if - we are not optimizing, then we have been asked to produce - an error about such constructs. For the purposes of this - test, subroutine calls are considered to be branches. */ - write_1_short (opcode1, insn1, fx->next, false); - return 1; - } - - /* Note: we do not have to worry about subroutine calls occuring - in the right hand container. The return address is always - aligned to the next 64 bit boundary, be that 64 or 32 bit away. */ - - switch (exec_type) - { - case EXEC_UNKNOWN: /* Order not specified. */ - if (Optimizing - && parallel_ok (opcode1, insn1, opcode2, insn2, exec_type) - && ! ( (opcode1->op->unit == EITHER_BUT_PREFER_MU - || opcode1->op->unit == MU) - && - ( opcode2->op->unit == EITHER_BUT_PREFER_MU - || opcode2->op->unit == MU))) - { - /* parallel */ - exec_type = EXEC_PARALLEL; - - if (opcode1->op->unit == IU - || opcode2->op->unit == MU - || opcode2->op->unit == EITHER_BUT_PREFER_MU) - insn = FM00 | (insn2 << 32) | insn1; - else - { - insn = FM00 | (insn1 << 32) | insn2; - fx = fx->next; - } - } - else if ((opcode1->op->flags_used & (FLAG_JMP | FLAG_JSR) - && ((opcode1->op->flags_used & FLAG_DELAY) == 0) - && ((opcode1->ecc == ECC_AL) || ! Optimizing)) - || opcode1->op->flags_used & FLAG_RP) - { - /* We must emit (non-delayed) branch type instructions - on their own with nothing in the right container. */ - /* We must treat repeat instructions likewise, since the - following instruction has to be separate from the repeat - in order to be repeated. */ - write_1_short (opcode1, insn1, fx->next, false); - return 1; - } - else if (prev_left_kills_right_p) - { - /* The left instruction kils the right slot, so we - must leave it empty. */ - write_1_short (opcode1, insn1, fx->next, false); - return 1; - } - else if (opcode1->op->unit == IU - || (opcode1->op->unit == EITHER - && opcode2->op->unit == EITHER_BUT_PREFER_MU)) - { - /* reverse sequential */ - insn = FM10 | (insn2 << 32) | insn1; - exec_type = EXEC_REVSEQ; - } - else - { - /* sequential */ - insn = FM01 | (insn1 << 32) | insn2; - fx = fx->next; - exec_type = EXEC_SEQ; - } - break; - - case EXEC_PARALLEL: /* parallel */ - flag_explicitly_parallel = flag_xp_state; - if (! parallel_ok (opcode1, insn1, opcode2, insn2, exec_type)) - as_bad (_("Instructions may not be executed in parallel")); - else if (opcode1->op->unit == IU) - { - if (opcode2->op->unit == IU) - as_bad (_("Two IU instructions may not be executed in parallel")); - as_warn (_("Swapping instruction order")); - insn = FM00 | (insn2 << 32) | insn1; - } - else if (opcode2->op->unit == MU) - { - if (opcode1->op->unit == MU) - as_bad (_("Two MU instructions may not be executed in parallel")); - else if (opcode1->op->unit == EITHER_BUT_PREFER_MU) - as_warn (_("Executing %s in IU may not work"), opcode1->op->name); - as_warn (_("Swapping instruction order")); - insn = FM00 | (insn2 << 32) | insn1; - } - else - { - if (opcode2->op->unit == EITHER_BUT_PREFER_MU) - as_warn (_("Executing %s in IU may not work"), opcode2->op->name); - - insn = FM00 | (insn1 << 32) | insn2; - fx = fx->next; - } - flag_explicitly_parallel = 0; - break; - - case EXEC_SEQ: /* sequential */ - if (opcode1->op->unit == IU) - as_bad (_("IU instruction may not be in the left container")); - if (prev_left_kills_right_p) - as_bad (_("special left instruction `%s' kills instruction " - "`%s' in right container"), - opcode1->op->name, opcode2->op->name); - if (opcode2->op->unit == EITHER_BUT_PREFER_MU) - as_warn (_("Executing %s in IU may not work"), opcode2->op->name); - insn = FM01 | (insn1 << 32) | insn2; - fx = fx->next; - break; - - case EXEC_REVSEQ: /* reverse sequential */ - if (opcode2->op->unit == MU) - as_bad (_("MU instruction may not be in the right container")); - if (opcode2->op->unit == EITHER_BUT_PREFER_MU) - as_warn (_("Executing %s in IU may not work"), opcode2->op->name); - insn = FM10 | (insn1 << 32) | insn2; - fx = fx->next; - break; - - default: - as_fatal (_("unknown execution type passed to write_2_short()")); - } - - /* printf ("writing out %llx\n",insn); */ - f = frag_more (8); - d30v_number_to_chars (f, insn, 8); - - /* If the previous instruction was a 32-bit multiply but it is put into a - parallel container, mark the current instruction as being a 32-bit - multiply. */ - if (prev_mul32_p && exec_type == EXEC_PARALLEL) - cur_mul32_p = 1; - - for (j=0; j<2; j++) - { - for (i=0; i < fx->fc; i++) - { - if (fx->fix[i].reloc) - { - where = (f - frag_now->fr_literal) + 4*j; - - fix_new_exp (frag_now, - where, - fx->fix[i].size, - &(fx->fix[i].exp), - fx->fix[i].pcrel, - fx->fix[i].reloc); - } - } - - fx->fc = 0; - fx = fx->next; - } - - return 0; -} - - -/* Check 2 instructions and determine if they can be safely */ -/* executed in parallel. Returns 1 if they can be. */ -static int -parallel_ok (op1, insn1, op2, insn2, exec_type) - struct d30v_insn *op1, *op2; - unsigned long insn1, insn2; - exec_type_enum exec_type; -{ - int i, j, shift, regno, bits, ecc; - unsigned long flags, mask, flags_set1, flags_set2, flags_used1, flags_used2; - unsigned long ins, mod_reg[2][3], used_reg[2][3], flag_reg[2]; - struct d30v_format *f; - struct d30v_opcode *op; - - /* section 4.3: both instructions must not be IU or MU only */ - if ((op1->op->unit == IU && op2->op->unit == IU) - || (op1->op->unit == MU && op2->op->unit == MU)) - return 0; - - /* first instruction must not be a jump to safely optimize, unless this - is an explicit parallel operation. */ - if (exec_type != EXEC_PARALLEL - && (op1->op->flags_used & (FLAG_JMP | FLAG_JSR))) - return 0; - - /* If one instruction is /TX or /XT and the other is /FX or /XF respectively, - then it is safe to allow the two to be done as parallel ops, since only - one will ever be executed at a time. */ - if ((op1->ecc == ECC_TX && op2->ecc == ECC_FX) - || (op1->ecc == ECC_FX && op2->ecc == ECC_TX) - || (op1->ecc == ECC_XT && op2->ecc == ECC_XF) - || (op1->ecc == ECC_XF && op2->ecc == ECC_XT)) - return 1; - - /* [0] r0-r31 - [1] r32-r63 - [2] a0, a1, flag registers */ - - for (j = 0; j < 2; j++) - { - if (j == 0) - { - f = op1->form; - op = op1->op; - ecc = op1->ecc; - ins = insn1; - } - else - { - f = op2->form; - op = op2->op; - ecc = op2->ecc; - ins = insn2; - } - flag_reg[j] = 0; - mod_reg[j][0] = mod_reg[j][1] = 0; - used_reg[j][0] = used_reg[j][1] = 0; - - if (flag_explicitly_parallel) - { - /* For human specified parallel instructions we have been asked - to ignore the possibility that both instructions could modify - bits in the PSW, so we initialise the mod & used arrays to 0. - We have been asked, however, to refuse to allow parallel - instructions which explicitly set the same flag register, - eg "cmpne f0,r1,0x10 || cmpeq f0, r5, 0x2", so further on we test - for the use of a flag register and set a bit in the mod or used - array appropriately. */ - - mod_reg[j][2] = 0; - used_reg[j][2] = 0; - } - else - { - mod_reg[j][2] = (op->flags_set & FLAG_ALL); - used_reg[j][2] = (op->flags_used & FLAG_ALL); - } - - /* BSR/JSR always sets R62 */ - if (op->flags_used & FLAG_JSR) - mod_reg[j][1] = (1L << (62-32)); - - /* conditional execution affects the flags_used */ - switch (ecc) - { - case ECC_TX: - case ECC_FX: - used_reg[j][2] |= flag_reg[j] = FLAG_0; - break; - - case ECC_XT: - case ECC_XF: - used_reg[j][2] |= flag_reg[j] = FLAG_1; - break; - - case ECC_TT: - case ECC_TF: - used_reg[j][2] |= flag_reg[j] = (FLAG_0 | FLAG_1); - break; - } - - for (i = 0; f->operands[i]; i++) - { - flags = d30v_operand_table[f->operands[i]].flags; - shift = 12 - d30v_operand_table[f->operands[i]].position; - bits = d30v_operand_table[f->operands[i]].bits; - if (bits == 32) - mask = 0xffffffff; - else - mask = 0x7FFFFFFF >> (31 - bits); - - if ((flags & OPERAND_PLUS) || (flags & OPERAND_MINUS)) - { - /* this is a post-increment or post-decrement */ - /* the previous register needs to be marked as modified */ - - shift = 12 - d30v_operand_table[f->operands[i-1]].position; - regno = (ins >> shift) & 0x3f; - if (regno >= 32) - mod_reg[j][1] |= 1L << (regno - 32); - else - mod_reg[j][0] |= 1L << regno; - } - else if (flags & OPERAND_REG) - { - regno = (ins >> shift) & mask; - /* the memory write functions don't have a destination register */ - if ((flags & OPERAND_DEST) && !(op->flags_set & FLAG_MEM)) - { - /* MODIFIED registers and flags */ - if (flags & OPERAND_ACC) - { - if (regno == 0) - mod_reg[j][2] |= FLAG_A0; - else if (regno == 1) - mod_reg[j][2] |= FLAG_A1; - else - abort (); - } - else if (flags & OPERAND_FLAG) - mod_reg[j][2] |= 1L << regno; - else if (!(flags & OPERAND_CONTROL)) - { - int r, z; - - /* need to check if there are two destination */ - /* registers, for example ld2w */ - if (flags & OPERAND_2REG) - z = 1; - else - z = 0; - - for (r = regno; r <= regno + z; r++) - { - if (r >= 32) - mod_reg[j][1] |= 1L << (r - 32); - else - mod_reg[j][0] |= 1L << r; - } - } - } - else - { - /* USED, but not modified registers and flags */ - if (flags & OPERAND_ACC) - { - if (regno == 0) - used_reg[j][2] |= FLAG_A0; - else if (regno == 1) - used_reg[j][2] |= FLAG_A1; - else - abort (); - } - else if (flags & OPERAND_FLAG) - used_reg[j][2] |= 1L << regno; - else if (!(flags & OPERAND_CONTROL)) - { - int r, z; - - /* need to check if there are two source */ - /* registers, for example st2w */ - if (flags & OPERAND_2REG) - z = 1; - else - z = 0; - - for (r = regno; r <= regno + z; r++) - { - if (r >= 32) - used_reg[j][1] |= 1L << (r - 32); - else - used_reg[j][0] |= 1L << r; - } - } - } - } - } - } - - flags_set1 = op1->op->flags_set; - flags_set2 = op2->op->flags_set; - flags_used1 = op1->op->flags_used; - flags_used2 = op2->op->flags_used; - - /* ST2W/ST4HB combined with ADDppp/SUBppp is illegal. */ - if (((flags_set1 & (FLAG_MEM | FLAG_2WORD)) == (FLAG_MEM | FLAG_2WORD) - && (flags_used2 & FLAG_ADDSUBppp) != 0) - || ((flags_set2 & (FLAG_MEM | FLAG_2WORD)) == (FLAG_MEM | FLAG_2WORD) - && (flags_used1 & FLAG_ADDSUBppp) != 0)) - return 0; - - /* Load instruction combined with half-word multiply is illegal. */ - if (((flags_used1 & FLAG_MEM) != 0 && (flags_used2 & FLAG_MUL16)) - || ((flags_used2 & FLAG_MEM) != 0 && (flags_used1 & FLAG_MUL16))) - return 0; - - /* Specifically allow add || add by removing carry, overflow bits dependency. - This is safe, even if an addc follows since the IU takes the argument in - the right container, and it writes its results last. - However, don't paralellize add followed by addc or sub followed by - subb. */ - - if (mod_reg[0][2] == FLAG_CVVA && mod_reg[1][2] == FLAG_CVVA - && (used_reg[0][2] & ~flag_reg[0]) == 0 - && (used_reg[1][2] & ~flag_reg[1]) == 0 - && op1->op->unit == EITHER && op2->op->unit == EITHER) - { - mod_reg[0][2] = mod_reg[1][2] = 0; - } - - for (j = 0; j < 3; j++) - { - /* If the second instruction depends on the first, we obviously - cannot parallelize. Note, the mod flag implies use, so - check that as well. */ - /* If flag_explicitly_parallel is set, then the case of the - second instruction using a register the first instruction - modifies is assumed to be okay; we trust the human. We - don't trust the human if both instructions modify the same - register but we do trust the human if they modify the same - flags. */ - /* We have now been requested not to trust the human if the - instructions modify the same flag registers either. */ - if (flag_explicitly_parallel) - { - if ((mod_reg[0][j] & mod_reg[1][j]) != 0) - return 0; - } - else - if ((mod_reg[0][j] & (mod_reg[1][j] | used_reg[1][j])) != 0) - return 0; - } - - return 1; -} - - -/* This is the main entry point for the machine-dependent assembler. str points to a - machine-dependent instruction. This function is supposed to emit the frags/bytes - it assembles to. For the D30V, it mostly handles the special VLIW parsing and packing - and leaves the difficult stuff to do_assemble(). */ - -static long long prev_insn = -1; -static struct d30v_insn prev_opcode; -static subsegT prev_subseg; -static segT prev_seg = 0; - -void -md_assemble (str) - char *str; -{ - struct d30v_insn opcode; - long long insn; - exec_type_enum extype = EXEC_UNKNOWN; /* execution type; parallel, etc */ - static exec_type_enum etype = EXEC_UNKNOWN; /* saved extype. used for multiline instructions */ - char *str2; - - if ((prev_insn != -1) && prev_seg - && ((prev_seg != now_seg) || (prev_subseg != now_subseg))) - d30v_cleanup (false); - - if (d30v_current_align < 3) - d30v_align (3, NULL, d30v_last_label); - else if (d30v_current_align > 3) - d30v_current_align = 3; - d30v_last_label = NULL; - - flag_explicitly_parallel = 0; - flag_xp_state = 0; - if (etype == EXEC_UNKNOWN) - { - /* look for the special multiple instruction separators */ - str2 = strstr (str, "||"); - if (str2) - { - extype = EXEC_PARALLEL; - flag_xp_state = 1; - } - else - { - str2 = strstr (str, "->"); - if (str2) - extype = EXEC_SEQ; - else - { - str2 = strstr (str, "<-"); - if (str2) - extype = EXEC_REVSEQ; - } - } - /* str2 points to the separator, if one */ - if (str2) - { - *str2 = 0; - - /* if two instructions are present and we already have one saved - then first write it out */ - d30v_cleanup (false); - - /* Assemble first instruction and save it. */ - prev_insn = do_assemble (str, &prev_opcode, 1, 0); - if (prev_insn == -1) - as_bad (_("Cannot assemble instruction")); - if (prev_opcode.form != NULL && prev_opcode.form->form >= LONG) - as_bad (_("First opcode is long. Unable to mix instructions as specified.")); - fixups = fixups->next; - str = str2 + 2; - prev_seg = now_seg; - prev_subseg = now_subseg; - } - } - - insn = do_assemble (str, &opcode, - (extype != EXEC_UNKNOWN || etype != EXEC_UNKNOWN), - extype == EXEC_PARALLEL); - if (insn == -1) - { - if (extype != EXEC_UNKNOWN) - etype = extype; - as_bad (_("Cannot assemble instruction")); - return; - } - - if (etype != EXEC_UNKNOWN) - { - extype = etype; - etype = EXEC_UNKNOWN; - } - - /* Word multiply instructions must not be followed by either a load or a - 16-bit multiply instruction in the next cycle. */ - if ( (extype != EXEC_REVSEQ) - && prev_mul32_p - && (opcode.op->flags_used & (FLAG_MEM | FLAG_MUL16))) - { - /* However, load and multiply should able to be combined in a parallel - operation, so check for that first. */ - if (prev_insn != -1 - && (opcode.op->flags_used & FLAG_MEM) - && opcode.form->form < LONG - && (extype == EXEC_PARALLEL || (Optimizing && extype == EXEC_UNKNOWN)) - && parallel_ok (&prev_opcode, (long)prev_insn, - &opcode, (long)insn, extype) - && write_2_short (&prev_opcode, (long)prev_insn, - &opcode, (long)insn, extype, fixups) == 0) - { - /* no instructions saved */ - prev_insn = -1; - return; - } - else - { - /* Can't parallelize, flush previous instruction and emit a word of NOPS, - unless the previous instruction is a NOP, in which case just flush it, - as this will generate a word of NOPs for us. */ - - if (prev_insn != -1 && (strcmp (prev_opcode.op->name, "nop") == 0)) - d30v_cleanup (false); - else - { - char * f; - - if (prev_insn != -1) - d30v_cleanup (true); - else - { - f = frag_more (8); - d30v_number_to_chars (f, NOP2, 8); - - if (warn_nops == NOP_ALL || warn_nops == NOP_MULTIPLY) - { - if (opcode.op->flags_used & FLAG_MEM) - as_warn (_("word of NOPs added between word multiply and load")); - else - as_warn (_("word of NOPs added between word multiply and 16-bit multiply")); - } - } - } - - extype = EXEC_UNKNOWN; - } - } - else if ( (extype == EXEC_REVSEQ) - && cur_mul32_p - && (prev_opcode.op->flags_used & (FLAG_MEM | FLAG_MUL16))) - { - /* Can't parallelize, flush current instruction and add a sequential NOP. */ - write_1_short (& opcode, (long) insn, fixups->next->next, true); - - /* Make the previous instruction the current one. */ - extype = EXEC_UNKNOWN; - insn = prev_insn; - now_seg = prev_seg; - now_subseg = prev_subseg; - prev_insn = -1; - cur_mul32_p = prev_mul32_p; - prev_mul32_p = 0; - memcpy (&opcode, &prev_opcode, sizeof (prev_opcode)); - } - - /* If this is a long instruction, write it and any previous short instruction. */ - if (opcode.form->form >= LONG) - { - if (extype != EXEC_UNKNOWN) - as_bad (_("Instruction uses long version, so it cannot be mixed as specified")); - d30v_cleanup (false); - write_long (& opcode, insn, fixups); - prev_insn = -1; - } - else if ((prev_insn != -1) - && (write_2_short - (& prev_opcode, (long) prev_insn, & opcode, - (long) insn, extype, fixups) == 0)) - { - /* No instructions saved. */ - prev_insn = -1; - } - else - { - if (extype != EXEC_UNKNOWN) - as_bad (_("Unable to mix instructions as specified")); - - /* Save off last instruction so it may be packed on next pass. */ - memcpy (&prev_opcode, &opcode, sizeof (prev_opcode)); - prev_insn = insn; - prev_seg = now_seg; - prev_subseg = now_subseg; - fixups = fixups->next; - prev_mul32_p = cur_mul32_p; - } -} - - -/* do_assemble assembles a single instruction and returns an opcode */ -/* it returns -1 (an invalid opcode) on error */ - -#define NAME_BUF_LEN 20 - -static long long -do_assemble (str, opcode, shortp, is_parallel) - char *str; - struct d30v_insn *opcode; - int shortp; - int is_parallel; -{ - unsigned char * op_start; - unsigned char * save; - unsigned char * op_end; - char name [NAME_BUF_LEN]; - int cmp_hack; - int nlen = 0; - int fsize = (shortp ? FORCE_SHORT : 0); - expressionS myops [6]; - long long insn; - - /* Drop leading whitespace */ - while (* str == ' ') - str ++; - - /* find the opcode end */ - for (op_start = op_end = (unsigned char *) (str); - * op_end - && nlen < (NAME_BUF_LEN - 1) - && * op_end != '/' - && !is_end_of_line[*op_end] && *op_end != ' '; - op_end++) - { - name[nlen] = tolower (op_start[nlen]); - nlen++; - } - - if (nlen == 0) - return -1; - - name[nlen] = 0; - - /* if there is an execution condition code, handle it */ - if (*op_end == '/') - { - int i = 0; - while ( (i < ECC_MAX) && strncasecmp (d30v_ecc_names[i], op_end + 1, 2)) - i++; - - if (i == ECC_MAX) - { - char tmp[4]; - strncpy (tmp, op_end + 1, 2); - tmp[2] = 0; - as_bad (_("unknown condition code: %s"),tmp); - return -1; - } - /* printf ("condition code=%d\n",i); */ - opcode->ecc = i; - op_end += 3; - } - else - opcode->ecc = ECC_AL; - - - /* CMP and CMPU change their name based on condition codes */ - if (!strncmp (name, "cmp", 3)) - { - int p,i; - char **str = (char **)d30v_cc_names; - if (name[3] == 'u') - p = 4; - else - p = 3; - - for (i=1; *str && strncmp (*str, & name[p], 2); i++, str++) - ; - - /* cmpu only supports some condition codes */ - if (p == 4) - { - if (i < 3 || i > 6) - { - name[p+2]=0; - as_bad (_("cmpu doesn't support condition code %s"),&name[p]); - } - } - - if (!*str) - { - name[p+2]=0; - as_bad (_("unknown condition code: %s"),&name[p]); - } - - cmp_hack = i; - name[p] = 0; - } - else - cmp_hack = 0; - - /* printf("cmp_hack=%d\n",cmp_hack); */ - - /* need to look for .s or .l */ - if (name[nlen-2] == '.') - { - switch (name[nlen-1]) - { - case 's': - fsize = FORCE_SHORT; - break; - case 'l': - fsize = FORCE_LONG; - break; - } - name[nlen-2] = 0; - } - - /* find the first opcode with the proper name */ - opcode->op = (struct d30v_opcode *)hash_find (d30v_hash, name); - if (opcode->op == NULL) - { - as_bad (_("unknown opcode: %s"),name); - return -1; - } - - save = input_line_pointer; - input_line_pointer = op_end; - while (!(opcode->form = find_format (opcode->op, myops, fsize, cmp_hack))) - { - opcode->op++; - if (opcode->op->name == NULL || strcmp (opcode->op->name, name)) - { - as_bad (_("operands for opcode `%s' do not match any valid format"), name); - return -1; - } - } - input_line_pointer = save; - - insn = build_insn (opcode, myops); - - /* Propigate multiply status */ - if (insn != -1) - { - if (is_parallel && prev_mul32_p) - cur_mul32_p = 1; - else - { - prev_mul32_p = cur_mul32_p; - cur_mul32_p = (opcode->op->flags_used & FLAG_MUL32) != 0; - } - } - - /* Propagate left_kills_right status */ - if (insn != -1) - { - prev_left_kills_right_p = cur_left_kills_right_p; - - if (opcode->op->flags_set & FLAG_LKR) - { - cur_left_kills_right_p = 1; - - if (strcmp (opcode->op->name, "mvtsys") == 0) - { - /* Left kills right for only mvtsys only for PSW/PSWH/PSWL/flags target. */ - if ((myops[0].X_op == O_register) && - ((myops[0].X_add_number == OPERAND_CONTROL) || /* psw */ - (myops[0].X_add_number == OPERAND_CONTROL+MAX_CONTROL_REG+2) || /* pswh */ - (myops[0].X_add_number == OPERAND_CONTROL+MAX_CONTROL_REG+1) || /* pswl */ - (myops[0].X_add_number == OPERAND_FLAG+0) || /* f0 */ - (myops[0].X_add_number == OPERAND_FLAG+1) || /* f1 */ - (myops[0].X_add_number == OPERAND_FLAG+2) || /* f2 */ - (myops[0].X_add_number == OPERAND_FLAG+3) || /* f3 */ - (myops[0].X_add_number == OPERAND_FLAG+4) || /* f4 */ - (myops[0].X_add_number == OPERAND_FLAG+5) || /* f5 */ - (myops[0].X_add_number == OPERAND_FLAG+6) || /* f6 */ - (myops[0].X_add_number == OPERAND_FLAG+7))) /* f7 */ - { - cur_left_kills_right_p = 1; - } - else - { - /* Other mvtsys target registers don't kill right instruction. */ - cur_left_kills_right_p = 0; - } - } /* mvtsys */ - } - else - cur_left_kills_right_p = 0; - } - - return insn; -} - - -/* find_format() gets a pointer to an entry in the format table. - It must look at all formats for an opcode and use the operands - to choose the correct one. Returns NULL on error. */ - -static struct d30v_format * -find_format (opcode, myops, fsize, cmp_hack) - struct d30v_opcode *opcode; - expressionS myops[]; - int fsize; - int cmp_hack; -{ - int numops, match, index, i=0, j, k; - struct d30v_format *fm; - - if (opcode == NULL) - return NULL; - - /* Get all the operands and save them as expressions. */ - numops = get_operands (myops, cmp_hack); - - while ((index = opcode->format[i++]) != 0) - { - if (fsize == FORCE_SHORT && index >= LONG) - continue; - - if (fsize == FORCE_LONG && index < LONG) - continue; - - fm = (struct d30v_format *)&d30v_format_table[index]; - k = index; - while (fm->form == index) - { - match = 1; - /* Now check the operands for compatibility. */ - for (j = 0; match && fm->operands[j]; j++) - { - int flags = d30v_operand_table[fm->operands[j]].flags; - int bits = d30v_operand_table[fm->operands[j]].bits; - int X_op = myops[j].X_op; - int num = myops[j].X_add_number; - - if (flags & OPERAND_SPECIAL) - break; - else if (X_op == O_illegal) - match = 0; - else if (flags & OPERAND_REG) - { - if (X_op != O_register - || ((flags & OPERAND_ACC) && !(num & OPERAND_ACC)) - || (!(flags & OPERAND_ACC) && (num & OPERAND_ACC)) - || ((flags & OPERAND_FLAG) && !(num & OPERAND_FLAG)) - || (!(flags & (OPERAND_FLAG | OPERAND_CONTROL)) && (num & OPERAND_FLAG)) - || ((flags & OPERAND_CONTROL) - && !(num & (OPERAND_CONTROL | OPERAND_FLAG)))) - { - match = 0; - } - } - else if (((flags & OPERAND_MINUS) - && (X_op != O_absent || num != OPERAND_MINUS)) - || ((flags & OPERAND_PLUS) - && (X_op != O_absent || num != OPERAND_PLUS)) - || ((flags & OPERAND_ATMINUS) - && (X_op != O_absent || num != OPERAND_ATMINUS)) - || ((flags & OPERAND_ATPAR) - && (X_op != O_absent || num != OPERAND_ATPAR)) - || ((flags & OPERAND_ATSIGN) - && (X_op != O_absent || num != OPERAND_ATSIGN))) - { - match=0; - } - else if (flags & OPERAND_NUM) - { - /* A number can be a constant or symbol expression. */ - - /* If we have found a register name, but that name also - matches a symbol, then re-parse the name as an expression. */ - if (X_op == O_register - && symbol_find ((char *) myops[j].X_op_symbol)) - { - input_line_pointer = (char *) myops[j].X_op_symbol; - expression (& myops[j]); - } - - /* Turn an expression into a symbol for later resolution. */ - if (X_op != O_absent && X_op != O_constant - && X_op != O_symbol && X_op != O_register - && X_op != O_big) - { - symbolS *sym = make_expr_symbol (&myops[j]); - myops[j].X_op = X_op = O_symbol; - myops[j].X_add_symbol = sym; - myops[j].X_add_number = num = 0; - } - - if (fm->form >= LONG) - { - /* If we're testing for a LONG format, either fits. */ - if (X_op != O_constant && X_op != O_symbol) - match = 0; - } - else if (fm->form < LONG - && ((fsize == FORCE_SHORT && X_op == O_symbol) - || (fm->form == SHORT_D2 && j == 0))) - match = 1; - /* This is the tricky part. Will the constant or symbol - fit into the space in the current format? */ - else if (X_op == O_constant) - { - if (check_range (num, bits, flags)) - match = 0; - } - else if (X_op == O_symbol - && S_IS_DEFINED (myops[j].X_add_symbol) - && S_GET_SEGMENT (myops[j].X_add_symbol) == now_seg - && opcode->reloc_flag == RELOC_PCREL) - { - /* If the symbol is defined, see if the value will fit - into the form we're considering. */ - fragS *f; - long value; - - /* Calculate the current address by running through the - previous frags and adding our current offset. */ - value = 0; - for (f = frchain_now->frch_root; f; f = f->fr_next) - value += f->fr_fix + f->fr_offset; - value = (S_GET_VALUE (myops[j].X_add_symbol) - value - - (obstack_next_free (&frchain_now->frch_obstack) - - frag_now->fr_literal)); - if (check_range (value, bits, flags)) - match = 0; - } - else - match = 0; - } - } - /* printf("through the loop: match=%d\n",match); */ - /* We're only done if the operands matched so far AND there - are no more to check. */ - if (match && myops[j].X_op == 0) - { - /* Final check - issue a warning if an odd numbered register - is used as the first register in an instruction that reads - or writes 2 registers. */ - - for (j = 0; fm->operands[j]; j++) - if (myops[j].X_op == O_register - && (myops[j].X_add_number & 1) - && (d30v_operand_table[fm->operands[j]].flags & OPERAND_2REG)) - as_warn (\ -_("Odd numbered register used as target of multi-register instruction")); - - return fm; - } - fm = (struct d30v_format *)&d30v_format_table[++k]; - } - /* printf("trying another format: i=%d\n",i); */ - } - return NULL; -} - -/* if while processing a fixup, a reloc really needs to be created */ -/* then it is done here */ - -arelent * -tc_gen_reloc (seg, fixp) - asection *seg; - fixS *fixp; -{ - arelent *reloc; - reloc = (arelent *) xmalloc (sizeof (arelent)); - reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); - *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); - reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; - reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); - if (reloc->howto == (reloc_howto_type *) NULL) - { - as_bad_where (fixp->fx_file, fixp->fx_line, - _("reloc %d not supported by object file format"), (int)fixp->fx_r_type); - return NULL; - } - reloc->addend = fixp->fx_addnumber; - return reloc; -} - -int -md_estimate_size_before_relax (fragp, seg) - fragS *fragp; - asection *seg; -{ - abort (); - return 0; -} - -long -md_pcrel_from_section (fixp, sec) - fixS *fixp; - segT sec; -{ - if (fixp->fx_addsy != (symbolS *)NULL && (!S_IS_DEFINED (fixp->fx_addsy) || - (S_GET_SEGMENT (fixp->fx_addsy) != sec))) - return 0; - return fixp->fx_frag->fr_address + fixp->fx_where; -} - -int -md_apply_fix3 (fixp, valuep, seg) - fixS * fixp; - valueT * valuep; - segT seg; -{ - char * where; - unsigned long insn, insn2; - long value; - - if (fixp->fx_addsy == (symbolS *) NULL) - { - value = * valuep; - fixp->fx_done = 1; - } - else if (fixp->fx_pcrel) - value = * valuep; - else - { - value = fixp->fx_offset; - - if (fixp->fx_subsy != (symbolS *) NULL) - { - if (S_GET_SEGMENT (fixp->fx_subsy) == absolute_section) - value -= S_GET_VALUE (fixp->fx_subsy); - else - { - /* We don't actually support subtracting a symbol. */ - as_bad_where (fixp->fx_file, fixp->fx_line, - _("expression too complex")); - } - } - } - - /* Fetch the instruction, insert the fully resolved operand - value, and stuff the instruction back again. */ - where = fixp->fx_frag->fr_literal + fixp->fx_where; - insn = bfd_getb32 ((unsigned char *) where); - - switch (fixp->fx_r_type) - { - case BFD_RELOC_8: /* Check for a bad .byte directive. */ - if (fixp->fx_addsy != NULL) - as_bad (_("line %d: unable to place address of symbol '%s' into a byte"), - fixp->fx_line, S_GET_NAME (fixp->fx_addsy)); - else if (((unsigned)value) > 0xff) - as_bad (_("line %d: unable to place value %x into a byte"), - fixp->fx_line, value); - else - * (unsigned char *) where = value; - break; - - case BFD_RELOC_16: /* Check for a bad .short directive. */ - if (fixp->fx_addsy != NULL) - as_bad (_("line %d: unable to place address of symbol '%s' into a short"), - fixp->fx_line, S_GET_NAME (fixp->fx_addsy)); - else if (((unsigned)value) > 0xffff) - as_bad (_("line %d: unable to place value %x into a short"), - fixp->fx_line, value); - else - bfd_putb16 ((bfd_vma) value, (unsigned char *) where); - break; - - case BFD_RELOC_64: /* Check for a bad .quad directive. */ - if (fixp->fx_addsy != NULL) - as_bad (_("line %d: unable to place address of symbol '%s' into a quad"), - fixp->fx_line, S_GET_NAME (fixp->fx_addsy)); - else - { - bfd_putb32 ((bfd_vma) value, (unsigned char *) where); - bfd_putb32 (0, ((unsigned char *) where) + 4); - } - break; - - case BFD_RELOC_D30V_6: - check_size (value, 6, fixp->fx_file, fixp->fx_line); - insn |= value & 0x3F; - bfd_putb32 ((bfd_vma) insn, (unsigned char *) where); - break; - - case BFD_RELOC_D30V_9_PCREL: - if (fixp->fx_where & 0x7) - { - if (fixp->fx_done) - value += 4; - else - fixp->fx_r_type = BFD_RELOC_D30V_9_PCREL_R; - } - check_size (value, 9, fixp->fx_file, fixp->fx_line); - insn |= ((value >> 3) & 0x3F) << 12; - bfd_putb32 ((bfd_vma) insn, (unsigned char *) where); - break; - - case BFD_RELOC_D30V_15: - check_size (value, 15, fixp->fx_file, fixp->fx_line); - insn |= (value >> 3) & 0xFFF; - bfd_putb32 ((bfd_vma) insn, (unsigned char *) where); - break; - - case BFD_RELOC_D30V_15_PCREL: - if (fixp->fx_where & 0x7) - { - if (fixp->fx_done) - value += 4; - else - fixp->fx_r_type = BFD_RELOC_D30V_15_PCREL_R; - } - check_size (value, 15, fixp->fx_file, fixp->fx_line); - insn |= (value >> 3) & 0xFFF; - bfd_putb32 ((bfd_vma) insn, (unsigned char *) where); - break; - - case BFD_RELOC_D30V_21: - check_size (value, 21, fixp->fx_file, fixp->fx_line); - insn |= (value >> 3) & 0x3FFFF; - bfd_putb32 ((bfd_vma) insn, (unsigned char *) where); - break; - - case BFD_RELOC_D30V_21_PCREL: - if (fixp->fx_where & 0x7) - { - if (fixp->fx_done) - value += 4; - else - fixp->fx_r_type = BFD_RELOC_D30V_21_PCREL_R; - } - check_size (value, 21, fixp->fx_file, fixp->fx_line); - insn |= (value >> 3) & 0x3FFFF; - bfd_putb32 ((bfd_vma) insn, (unsigned char *) where); - break; - - case BFD_RELOC_D30V_32: - insn2 = bfd_getb32 ((unsigned char *) where + 4); - insn |= (value >> 26) & 0x3F; /* top 6 bits */ - insn2 |= ((value & 0x03FC0000) << 2); /* next 8 bits */ - insn2 |= value & 0x0003FFFF; /* bottom 18 bits */ - bfd_putb32 ((bfd_vma) insn, (unsigned char *) where); - bfd_putb32 ((bfd_vma) insn2, (unsigned char *) where + 4); - break; - - case BFD_RELOC_D30V_32_PCREL: - insn2 = bfd_getb32 ((unsigned char *) where + 4); - insn |= (value >> 26) & 0x3F; /* top 6 bits */ - insn2 |= ((value & 0x03FC0000) << 2); /* next 8 bits */ - insn2 |= value & 0x0003FFFF; /* bottom 18 bits */ - bfd_putb32 ((bfd_vma) insn, (unsigned char *) where); - bfd_putb32 ((bfd_vma) insn2, (unsigned char *) where + 4); - break; - - case BFD_RELOC_32: - bfd_putb32 ((bfd_vma) value, (unsigned char *) where); - break; - - default: - as_bad (_("line %d: unknown relocation type: 0x%x"), - fixp->fx_line,fixp->fx_r_type); - } - - return 0; -} - - -/* d30v_cleanup() is called after the assembler has finished parsing the input - file or after a label is defined. Because the D30V assembler sometimes saves short - instructions to see if it can package them with the next instruction, there may - be a short instruction that still needs written. */ -int -d30v_cleanup (use_sequential) - int use_sequential; -{ - segT seg; - subsegT subseg; - - if (prev_insn != -1) - { - seg = now_seg; - subseg = now_subseg; - subseg_set (prev_seg, prev_subseg); - write_1_short (&prev_opcode, (long)prev_insn, fixups->next, use_sequential); - subseg_set (seg, subseg); - prev_insn = -1; - if (use_sequential) - prev_mul32_p = false; - } - return 1; -} - -static void -d30v_number_to_chars (buf, value, n) - char *buf; /* Return 'nbytes' of chars here. */ - long long value; /* The value of the bits. */ - int n; /* Number of bytes in the output. */ -{ - while (n--) - { - buf[n] = value & 0xff; - value >>= 8; - } -} - - -/* This function is called at the start of every line. */ -/* it checks to see if the first character is a '.' */ -/* which indicates the start of a pseudo-op. If it is, */ -/* then write out any unwritten instructions */ - -void -d30v_start_line () -{ - char *c = input_line_pointer; - - while (isspace (*c)) - c++; - - if (*c == '.') - d30v_cleanup (false); -} - -static void -check_size (value, bits, file, line) - long value; - int bits; - char *file; - int line; -{ - int tmp, max; - - if (value < 0) - tmp = ~value; - else - tmp = value; - - max = (1 << (bits - 1)) - 1; - - if (tmp > max) - as_bad_where (file, line, _("value too large to fit in %d bits"), bits); - - return; -} - -/* d30v_frob_label() is called when after a label is recognized. */ - -void -d30v_frob_label (lab) - symbolS *lab; -{ - /* Emit any pending instructions. */ - d30v_cleanup (false); - - /* Update the label's address with the current output pointer. */ - symbol_set_frag (lab, frag_now); - S_SET_VALUE (lab, (valueT) frag_now_fix ()); - - /* Record this label for future adjustment after we find out what - kind of data it references, and the required alignment therewith. */ - d30v_last_label = lab; -} - -/* Hook into cons for capturing alignment changes. */ - -void -d30v_cons_align (size) - int size; -{ - int log_size; - - log_size = 0; - while ((size >>= 1) != 0) - ++log_size; - - if (d30v_current_align < log_size) - d30v_align (log_size, (char *) NULL, NULL); - else if (d30v_current_align > log_size) - d30v_current_align = log_size; - d30v_last_label = NULL; -} - -/* Called internally to handle all alignment needs. This takes care - of eliding calls to frag_align if'n the cached current alignment - says we've already got it, as well as taking care of the auto-aligning - labels wrt code. */ - -static void -d30v_align (n, pfill, label) - int n; - char *pfill; - symbolS *label; -{ - /* The front end is prone to changing segments out from under us - temporarily when -g is in effect. */ - int switched_seg_p = (d30v_current_align_seg != now_seg); - - /* Do not assume that if 'd30v_current_align >= n' and - '! switched_seg_p' that it is safe to avoid performing - this alignement request. The alignment of the current frag - can be changed under our feet, for example by a .ascii - directive in the source code. cf testsuite/gas/d30v/reloc.s */ - - d30v_cleanup (false); - - if (pfill == NULL) - { - if (n > 2 - && (bfd_get_section_flags (stdoutput, now_seg) & SEC_CODE) != 0) - { - static char const nop[4] = { 0x00, 0xf0, 0x00, 0x00 }; - - /* First, make sure we're on a four-byte boundary, in case - someone has been putting .byte values the text section. */ - if (d30v_current_align < 2 || switched_seg_p) - frag_align (2, 0, 0); - frag_align_pattern (n, nop, sizeof nop, 0); - } - else - frag_align (n, 0, 0); - } - else - frag_align (n, *pfill, 0); - - if (!switched_seg_p) - d30v_current_align = n; - - if (label != NULL) - { - symbolS * sym; - int label_seen = false; - struct frag * old_frag; - valueT old_value; - valueT new_value; - - assert (S_GET_SEGMENT (label) == now_seg); - - old_frag = symbol_get_frag (label); - old_value = S_GET_VALUE (label); - new_value = (valueT) frag_now_fix (); - - /* It is possible to have more than one label at a particular - address, especially if debugging is enabled, so we must - take care to adjust all the labels at this address in this - fragment. To save time we search from the end of the symbol - list, backwards, since the symbols we are interested in are - almost certainly the ones that were most recently added. - Also to save time we stop searching once we have seen at least - one matching label, and we encounter a label that is no longer - in the target fragment. Note, this search is guaranteed to - find at least one match when sym == label, so no special case - code is necessary. */ - for (sym = symbol_lastP; sym != NULL; sym = symbol_previous (sym)) - { - if (symbol_get_frag (sym) == old_frag - && S_GET_VALUE (sym) == old_value) - { - label_seen = true; - symbol_set_frag (sym, frag_now); - S_SET_VALUE (sym, new_value); - } - else if (label_seen && symbol_get_frag (sym) != old_frag) - break; - } - } - - record_alignment (now_seg, n); -} - -/* Handle the .align pseudo-op. This aligns to a power of two. We - hook here to latch the current alignment. */ - -static void -s_d30v_align (ignore) - int ignore; -{ - int align; - char fill, *pfill = NULL; - long max_alignment = 15; - - align = get_absolute_expression (); - if (align > max_alignment) - { - align = max_alignment; - as_warn (_("Alignment too large: %d assumed"), align); - } - else if (align < 0) - { - as_warn (_("Alignment negative: 0 assumed")); - align = 0; - } - - if (*input_line_pointer == ',') - { - input_line_pointer++; - fill = get_absolute_expression (); - pfill = &fill; - } - - d30v_last_label = NULL; - d30v_align (align, pfill, NULL); - - demand_empty_rest_of_line (); -} - -/* Handle the .text pseudo-op. This is like the usual one, but it - clears the saved last label and resets known alignment. */ - -static void -s_d30v_text (i) - int i; - -{ - s_text (i); - d30v_last_label = NULL; - d30v_current_align = 0; - d30v_current_align_seg = now_seg; -} - -/* Handle the .data pseudo-op. This is like the usual one, but it - clears the saved last label and resets known alignment. */ - -static void -s_d30v_data (i) - int i; -{ - s_data (i); - d30v_last_label = NULL; - d30v_current_align = 0; - d30v_current_align_seg = now_seg; -} - -/* Handle the .section pseudo-op. This is like the usual one, but it - clears the saved last label and resets known alignment. */ - -static void -s_d30v_section (ignore) - int ignore; -{ - obj_elf_section (ignore); - d30v_last_label = NULL; - d30v_current_align = 0; - d30v_current_align_seg = now_seg; -} |