1 /* ----------------------------------------------------------------------- *
3 * Copyright 1996-2013 The NASM Authors - All Rights Reserved
4 * See the file AUTHORS included with the NASM distribution for
5 * the specific copyright holders.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following
11 * * Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * * Redistributions in binary form must reproduce the above
14 * copyright notice, this list of conditions and the following
15 * disclaimer in the documentation and/or other materials provided
16 * with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
19 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
20 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
21 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
22 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
26 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
29 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
30 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 * ----------------------------------------------------------------------- */
35 * parser.c source line parser for the Netwide Assembler
56 extern int in_abs_seg; /* ABSOLUTE segment flag */
57 extern int32_t abs_seg; /* ABSOLUTE segment */
58 extern int32_t abs_offset; /* ABSOLUTE segment offset */
60 static int is_comma_next(void);
63 static struct tokenval tokval;
64 static struct location *location; /* Pointer to current line's segment,offset */
66 void parser_global_info(struct location * locp)
71 static int prefix_slot(int prefix)
105 nasm_error(ERR_PANIC, "Invalid value %d passed to prefix_slot()", prefix);
110 static void process_size_override(insn *result, operand *op)
112 if (tasm_compatible_mode) {
113 switch ((int)tokval.t_integer) {
114 /* For TASM compatibility a size override inside the
115 * brackets changes the size of the operand, not the
116 * address type of the operand as it does in standard
117 * NASM syntax. Hence:
119 * mov eax,[DWORD val]
121 * is valid syntax in TASM compatibility mode. Note that
122 * you lose the ability to override the default address
123 * type for the instruction, but we never use anything
124 * but 32-bit flat model addressing in our code.
146 nasm_error(ERR_NONFATAL,
147 "invalid operand size specification");
151 /* Standard NASM compatible syntax */
152 switch ((int)tokval.t_integer) {
154 op->eaflags |= EAF_TIMESTWO;
157 op->eaflags |= EAF_REL;
160 op->eaflags |= EAF_ABS;
164 op->eaflags |= EAF_BYTEOFFS;
169 if (result->prefixes[PPS_ASIZE] &&
170 result->prefixes[PPS_ASIZE] != tokval.t_integer)
171 nasm_error(ERR_NONFATAL,
172 "conflicting address size specifications");
174 result->prefixes[PPS_ASIZE] = tokval.t_integer;
178 op->eaflags |= EAF_WORDOFFS;
183 op->eaflags |= EAF_WORDOFFS;
187 op->eaflags |= EAF_WORDOFFS;
190 nasm_error(ERR_NONFATAL, "invalid size specification in"
191 " effective address");
198 * when two or more decorators follow a register operand,
199 * consecutive decorators are parsed here.
200 * opmask and zeroing decorators can be placed in any order.
201 * e.g. zmm1 {k2}{z} or zmm2 {z,k3}
202 * decorator(s) are placed at the end of an operand.
204 static bool parse_braces(decoflags_t *decoflags)
207 bool recover = false;
211 if (i == TOKEN_OPMASK) {
212 if (*decoflags & OPMASK_MASK) {
213 nasm_error(ERR_NONFATAL, "opmask k%lu is already set",
214 *decoflags & OPMASK_MASK);
215 *decoflags &= ~OPMASK_MASK;
217 *decoflags |= VAL_OPMASK(nasm_regvals[tokval.t_integer]);
218 } else if (i == TOKEN_DECORATOR) {
219 switch (tokval.t_integer) {
222 * according to AVX512 spec, only zeroing/merging decorator
223 * is supported with opmask
225 *decoflags |= GEN_Z(0);
228 nasm_error(ERR_NONFATAL, "{%s} is not an expected decorator",
232 } else if (i == ',' || i == TOKEN_EOS){
235 nasm_error(ERR_NONFATAL, "only a series of valid decorators"
240 i = stdscan(NULL, &tokval);
246 static int parse_mref(operand *op, const expr *e)
248 int b, i, s; /* basereg, indexreg, scale */
249 int64_t o; /* offset */
254 if (e->type && e->type <= EXPR_REG_END) { /* this bit's a register */
255 bool is_gpr = is_class(REG_GPR,nasm_reg_flags[e->type]);
257 if (is_gpr && e->value == 1)
258 b = e->type; /* It can be basereg */
259 else /* No, it has to be indexreg */
260 i = e->type, s = e->value;
263 if (e->type && e->type <= EXPR_REG_END) { /* it's a 2nd register */
264 bool is_gpr = is_class(REG_GPR,nasm_reg_flags[e->type]);
266 if (b != -1) /* If the first was the base, ... */
267 i = e->type, s = e->value; /* second has to be indexreg */
269 else if (!is_gpr || e->value != 1) {
270 /* If both want to be index */
271 nasm_error(ERR_NONFATAL,
272 "invalid effective address: two index registers");
278 if (e->type != 0) { /* is there an offset? */
279 if (e->type <= EXPR_REG_END) { /* in fact, is there an error? */
280 nasm_error(ERR_NONFATAL,
281 "beroset-p-603-invalid effective address");
284 if (e->type == EXPR_UNKNOWN) {
285 op->opflags |= OPFLAG_UNKNOWN;
286 o = 0; /* doesn't matter what */
287 op->wrt = NO_SEG; /* nor this */
288 op->segment = NO_SEG; /* or this */
290 e++; /* go to the end of the line */
292 if (e->type == EXPR_SIMPLE) {
296 if (e->type == EXPR_WRT) {
302 * Look for a segment base type.
304 if (e->type && e->type < EXPR_SEGBASE) {
305 nasm_error(ERR_NONFATAL,
306 "beroset-p-630-invalid effective address");
309 while (e->type && e->value == 0)
311 if (e->type && e->value != 1) {
312 nasm_error(ERR_NONFATAL,
313 "beroset-p-637-invalid effective address");
317 op->segment = e->type - EXPR_SEGBASE;
320 op->segment = NO_SEG;
321 while (e->type && e->value == 0)
324 nasm_error(ERR_NONFATAL,
325 "beroset-p-650-invalid effective address");
333 op->segment = NO_SEG;
336 if (e->type != 0) { /* there'd better be nothing left! */
337 nasm_error(ERR_NONFATAL,
338 "beroset-p-663-invalid effective address");
349 static void mref_set_optype(operand *op)
352 int i = op->indexreg;
355 /* It is memory, but it can match any r/m operand */
356 op->type |= MEMORY_ANY;
358 if (b == -1 && (i == -1 || s == 0)) {
359 int is_rel = globalbits == 64 &&
360 !(op->eaflags & EAF_ABS) &&
362 !(op->eaflags & EAF_FSGS)) ||
363 (op->eaflags & EAF_REL));
365 op->type |= is_rel ? IP_REL : MEM_OFFS;
369 opflags_t iclass = nasm_reg_flags[i];
371 if (is_class(XMMREG,iclass))
373 else if (is_class(YMMREG,iclass))
375 else if (is_class(ZMMREG,iclass))
380 insn *parse_line(int pass, char *buffer, insn *result, ldfunc ldef)
382 bool insn_is_label = false;
383 struct eval_hints hints;
391 result->forw_ref = false;
395 i = stdscan(NULL, &tokval);
397 result->label = NULL; /* Assume no label */
398 result->eops = NULL; /* must do this, whatever happens */
399 result->operands = 0; /* must initialize this */
400 result->evex_rm = 0; /* Ensure EVEX rounding mode is reset */
401 result->evex_brerop = -1; /* Reset EVEX broadcasting/ER op position */
403 /* Ignore blank lines */
410 (i != TOKEN_REG || !IS_SREG(tokval.t_integer))) {
411 nasm_error(ERR_NONFATAL,
412 "label or instruction expected at start of line");
416 if (i == TOKEN_ID || (insn_is_label && i == TOKEN_INSN)) {
417 /* there's a label here */
419 result->label = tokval.t_charptr;
420 i = stdscan(NULL, &tokval);
421 if (i == ':') { /* skip over the optional colon */
422 i = stdscan(NULL, &tokval);
424 nasm_error(ERR_WARNING | ERR_WARN_OL | ERR_PASS1,
425 "label alone on a line without a colon might be in error");
427 if (i != TOKEN_INSN || tokval.t_integer != I_EQU) {
429 * FIXME: location->segment could be NO_SEG, in which case
430 * it is possible we should be passing 'abs_seg'. Look into this.
431 * Work out whether that is *really* what we should be doing.
432 * Generally fix things. I think this is right as it is, but
433 * am still not certain.
435 ldef(result->label, in_abs_seg ? abs_seg : location->segment,
436 location->offset, NULL, true, false);
440 /* Just a label here */
444 nasm_build_assert(P_none != 0);
445 memset(result->prefixes, P_none, sizeof(result->prefixes));
448 while (i == TOKEN_PREFIX ||
449 (i == TOKEN_REG && IS_SREG(tokval.t_integer))) {
453 * Handle special case: the TIMES prefix.
455 if (i == TOKEN_PREFIX && tokval.t_integer == P_TIMES) {
458 i = stdscan(NULL, &tokval);
459 value = evaluate(stdscan, NULL, &tokval, NULL, pass0, nasm_error, NULL);
461 if (!value) /* Error in evaluator */
463 if (!is_simple(value)) {
464 nasm_error(ERR_NONFATAL,
465 "non-constant argument supplied to TIMES");
468 result->times = value->value;
469 if (value->value < 0 && pass0 == 2) {
470 nasm_error(ERR_NONFATAL, "TIMES value %"PRId64" is negative",
476 int slot = prefix_slot(tokval.t_integer);
477 if (result->prefixes[slot]) {
478 if (result->prefixes[slot] == tokval.t_integer)
479 nasm_error(ERR_WARNING | ERR_PASS1,
480 "instruction has redundant prefixes");
482 nasm_error(ERR_NONFATAL,
483 "instruction has conflicting prefixes");
485 result->prefixes[slot] = tokval.t_integer;
486 i = stdscan(NULL, &tokval);
490 if (i != TOKEN_INSN) {
494 for (j = 0; j < MAXPREFIX; j++) {
495 if ((pfx = result->prefixes[j]) != P_none)
499 if (i == 0 && pfx != P_none) {
501 * Instruction prefixes are present, but no actual
502 * instruction. This is allowed: at this point we
503 * invent a notional instruction of RESB 0.
505 result->opcode = I_RESB;
506 result->operands = 1;
507 result->oprs[0].type = IMMEDIATE;
508 result->oprs[0].offset = 0L;
509 result->oprs[0].segment = result->oprs[0].wrt = NO_SEG;
512 nasm_error(ERR_NONFATAL, "parser: instruction expected");
517 result->opcode = tokval.t_integer;
518 result->condition = tokval.t_inttwo;
521 * INCBIN cannot be satisfied with incorrectly
522 * evaluated operands, since the correct values _must_ be known
523 * on the first pass. Hence, even in pass one, we set the
524 * `critical' flag on calling evaluate(), so that it will bomb
525 * out on undefined symbols.
527 if (result->opcode == I_INCBIN) {
528 critical = (pass0 < 2 ? 1 : 2);
531 critical = (pass == 2 ? 2 : 0);
533 if (result->opcode == I_DB || result->opcode == I_DW ||
534 result->opcode == I_DD || result->opcode == I_DQ ||
535 result->opcode == I_DT || result->opcode == I_DO ||
536 result->opcode == I_DY || result->opcode == I_DZ ||
537 result->opcode == I_INCBIN) {
538 extop *eop, **tail = &result->eops, **fixptr;
542 result->eops_float = false;
545 * Begin to read the DB/DW/DD/DQ/DT/DO/DY/DZ/INCBIN operands.
548 i = stdscan(NULL, &tokval);
551 else if (first && i == ':') {
552 insn_is_label = true;
557 eop = *tail = nasm_malloc(sizeof(extop));
560 eop->type = EOT_NOTHING;
565 * is_comma_next() here is to distinguish this from
566 * a string used as part of an expression...
568 if (i == TOKEN_STR && is_comma_next()) {
569 eop->type = EOT_DB_STRING;
570 eop->stringval = tokval.t_charptr;
571 eop->stringlen = tokval.t_inttwo;
572 i = stdscan(NULL, &tokval); /* eat the comma */
573 } else if (i == TOKEN_STRFUNC) {
575 const char *funcname = tokval.t_charptr;
576 enum strfunc func = tokval.t_integer;
577 i = stdscan(NULL, &tokval);
580 i = stdscan(NULL, &tokval);
582 if (i != TOKEN_STR) {
583 nasm_error(ERR_NONFATAL,
584 "%s must be followed by a string constant",
586 eop->type = EOT_NOTHING;
588 eop->type = EOT_DB_STRING_FREE;
590 string_transform(tokval.t_charptr, tokval.t_inttwo,
591 &eop->stringval, func);
592 if (eop->stringlen == (size_t)-1) {
593 nasm_error(ERR_NONFATAL, "invalid string for transform");
594 eop->type = EOT_NOTHING;
597 if (parens && i && i != ')') {
598 i = stdscan(NULL, &tokval);
600 nasm_error(ERR_NONFATAL, "unterminated %s function",
605 i = stdscan(NULL, &tokval);
606 } else if (i == '-' || i == '+') {
607 char *save = stdscan_get();
609 sign = (i == '-') ? -1 : 1;
610 i = stdscan(NULL, &tokval);
611 if (i != TOKEN_FLOAT) {
613 i = tokval.t_type = token;
618 } else if (i == TOKEN_FLOAT) {
620 eop->type = EOT_DB_STRING;
621 result->eops_float = true;
623 eop->stringlen = idata_bytes(result->opcode);
624 if (eop->stringlen > 16) {
625 nasm_error(ERR_NONFATAL, "floating-point constant"
626 " encountered in DY or DZ instruction");
628 } else if (eop->stringlen < 1) {
629 nasm_error(ERR_NONFATAL, "floating-point constant"
630 " encountered in unknown instruction");
632 * fix suggested by Pedro Gimeno... original line was:
633 * eop->type = EOT_NOTHING;
638 eop = nasm_realloc(eop, sizeof(extop) + eop->stringlen);
641 eop->stringval = (char *)eop + sizeof(extop);
642 if (!eop->stringlen ||
643 !float_const(tokval.t_charptr, sign,
644 (uint8_t *)eop->stringval,
645 eop->stringlen, nasm_error))
646 eop->type = EOT_NOTHING;
647 i = stdscan(NULL, &tokval); /* eat the comma */
649 /* anything else, assume it is an expression */
653 value = evaluate(stdscan, NULL, &tokval, NULL,
654 critical, nasm_error, NULL);
656 if (!value) /* Error in evaluator */
658 if (is_unknown(value)) {
659 eop->type = EOT_DB_NUMBER;
660 eop->offset = 0; /* doesn't matter what we put */
661 eop->segment = eop->wrt = NO_SEG; /* likewise */
662 } else if (is_reloc(value)) {
663 eop->type = EOT_DB_NUMBER;
664 eop->offset = reloc_value(value);
665 eop->segment = reloc_seg(value);
666 eop->wrt = reloc_wrt(value);
668 nasm_error(ERR_NONFATAL,
669 "operand %d: expression is not simple"
670 " or relocatable", oper_num);
675 * We're about to call stdscan(), which will eat the
676 * comma that we're currently sitting on between
677 * arguments. However, we'd better check first that it
680 if (i == TOKEN_EOS) /* also could be EOL */
683 nasm_error(ERR_NONFATAL, "comma expected after operand %d",
689 if (result->opcode == I_INCBIN) {
691 * Correct syntax for INCBIN is that there should be
692 * one string operand, followed by one or two numeric
695 if (!result->eops || result->eops->type != EOT_DB_STRING)
696 nasm_error(ERR_NONFATAL, "`incbin' expects a file name");
697 else if (result->eops->next &&
698 result->eops->next->type != EOT_DB_NUMBER)
699 nasm_error(ERR_NONFATAL, "`incbin': second parameter is"
701 else if (result->eops->next && result->eops->next->next &&
702 result->eops->next->next->type != EOT_DB_NUMBER)
703 nasm_error(ERR_NONFATAL, "`incbin': third parameter is"
705 else if (result->eops->next && result->eops->next->next &&
706 result->eops->next->next->next)
707 nasm_error(ERR_NONFATAL,
708 "`incbin': more than three parameters");
712 * If we reach here, one of the above errors happened.
713 * Throw the instruction away.
716 } else /* DB ... */ if (oper_num == 0)
717 nasm_error(ERR_WARNING | ERR_PASS1,
718 "no operand for data declaration");
720 result->operands = oper_num;
726 * Now we begin to parse the operands. There may be up to four
727 * of these, separated by commas, and terminated by a zero token.
730 for (opnum = 0; opnum < MAX_OPERANDS; opnum++) {
731 operand *op = &result->oprs[opnum];
732 expr *value; /* used most of the time */
733 bool mref; /* is this going to be a memory ref? */
734 bool bracket; /* is it a [] mref, or a & mref? */
735 bool mib; /* compound (mib) mref? */
737 decoflags_t brace_flags = 0; /* flags for decorators in braces */
739 op->disp_size = 0; /* have to zero this whatever */
740 op->eaflags = 0; /* and this */
744 i = stdscan(NULL, &tokval);
746 break; /* end of operands: get out of here */
747 else if (first && i == ':') {
748 insn_is_label = true;
752 op->type = 0; /* so far, no override */
753 while (i == TOKEN_SPECIAL) { /* size specifiers */
754 switch ((int)tokval.t_integer) {
756 if (!setsize) /* we want to use only the first */
812 nasm_error(ERR_NONFATAL, "invalid operand size specification");
814 i = stdscan(NULL, &tokval);
817 if (i == '[' || i == '&') { /* memory reference */
819 bracket = (i == '[');
820 i = stdscan(NULL, &tokval); /* then skip the colon */
821 while (i == TOKEN_SPECIAL || i == TOKEN_PREFIX) {
822 process_size_override(result, op);
823 i = stdscan(NULL, &tokval);
825 /* when a comma follows an opening bracket - [ , eax*4] */
827 /* treat as if there is a zero displacement virtually */
828 tokval.t_type = TOKEN_NUM;
829 tokval.t_integer = 0;
830 stdscan_set(stdscan_get() - 1); /* rewind the comma */
832 } else { /* immediate operand, or register */
834 bracket = false; /* placate optimisers */
837 if ((op->type & FAR) && !mref &&
838 result->opcode != I_JMP && result->opcode != I_CALL) {
839 nasm_error(ERR_NONFATAL, "invalid use of FAR operand specifier");
842 value = evaluate(stdscan, NULL, &tokval,
844 critical, nasm_error, &hints);
846 if (op->opflags & OPFLAG_FORWARD) {
847 result->forw_ref = true;
849 if (!value) /* Error in evaluator */
851 if (i == ':' && mref) { /* it was seg:offset */
853 * Process the segment override.
855 if (value[1].type != 0 ||
857 !IS_SREG(value->type))
858 nasm_error(ERR_NONFATAL, "invalid segment override");
859 else if (result->prefixes[PPS_SEG])
860 nasm_error(ERR_NONFATAL,
861 "instruction has conflicting segment overrides");
863 result->prefixes[PPS_SEG] = value->type;
864 if (IS_FSGS(value->type))
865 op->eaflags |= EAF_FSGS;
868 i = stdscan(NULL, &tokval); /* then skip the colon */
869 while (i == TOKEN_SPECIAL || i == TOKEN_PREFIX) {
870 process_size_override(result, op);
871 i = stdscan(NULL, &tokval);
873 value = evaluate(stdscan, NULL, &tokval,
875 critical, nasm_error, &hints);
877 if (op->opflags & OPFLAG_FORWARD) {
878 result->forw_ref = true;
880 /* and get the offset */
881 if (!value) /* Error in evaluator */
886 if (mref && bracket && i == ',') {
887 /* [seg:base+offset,index*scale] syntax (mib) */
889 operand o1, o2; /* Partial operands */
891 if (parse_mref(&o1, value))
894 i = stdscan(NULL, &tokval); /* Eat comma */
895 value = evaluate(stdscan, NULL, &tokval, &op->opflags,
896 critical, nasm_error, &hints);
899 if (parse_mref(&o2, value))
902 if (o2.basereg != -1 && o2.indexreg == -1) {
903 o2.indexreg = o2.basereg;
908 if (o1.indexreg != -1 || o2.basereg != -1 || o2.offset != 0 ||
909 o2.segment != NO_SEG || o2.wrt != NO_SEG) {
910 nasm_error(ERR_NONFATAL, "invalid mib expression");
914 op->basereg = o1.basereg;
915 op->indexreg = o2.indexreg;
916 op->scale = o2.scale;
917 op->offset = o1.offset;
918 op->segment = o1.segment;
921 if (op->basereg != -1) {
922 op->hintbase = op->basereg;
923 op->hinttype = EAH_MAKEBASE;
924 } else if (op->indexreg != -1) {
925 op->hintbase = op->indexreg;
926 op->hinttype = EAH_NOTBASE;
929 op->hinttype = EAH_NOHINT;
936 if (mref && bracket) { /* find ] at the end */
938 nasm_error(ERR_NONFATAL, "parser: expecting ]");
940 } else { /* we got the required ] */
941 i = stdscan(NULL, &tokval);
942 if ((i == TOKEN_DECORATOR) || (i == TOKEN_OPMASK)) {
944 * according to AVX512 spec, broacast or opmask decorator
945 * is expected for memory reference operands
947 if (tokval.t_flag & TFLAG_BRDCAST) {
948 brace_flags |= GEN_BRDCAST(0);
949 i = stdscan(NULL, &tokval);
950 } else if (i == TOKEN_OPMASK) {
951 brace_flags |= VAL_OPMASK(nasm_regvals[tokval.t_integer]);
952 i = stdscan(NULL, &tokval);
954 nasm_error(ERR_NONFATAL, "broadcast or opmask "
955 "decorator expected inside braces");
960 if (i != 0 && i != ',') {
961 nasm_error(ERR_NONFATAL, "comma or end of line expected");
965 } else { /* immediate operand */
966 if (i != 0 && i != ',' && i != ':' &&
967 i != TOKEN_DECORATOR && i != TOKEN_OPMASK) {
968 nasm_error(ERR_NONFATAL, "comma, colon, decorator or end of "
969 "line expected after operand");
971 } else if (i == ':') {
973 } else if (i == TOKEN_DECORATOR || i == TOKEN_OPMASK) {
974 /* parse opmask (and zeroing) after an operand */
975 recover = parse_braces(&brace_flags);
979 do { /* error recovery */
980 i = stdscan(NULL, &tokval);
981 } while (i != 0 && i != ',');
985 * now convert the exprs returned from evaluate()
986 * into operand descriptions...
988 op->decoflags |= brace_flags;
990 if (mref) { /* it's a memory reference */
991 /* A mib reference was fully parsed already */
993 if (parse_mref(op, value))
995 op->hintbase = hints.base;
996 op->hinttype = hints.type;
999 } else { /* it's not a memory reference */
1000 if (is_just_unknown(value)) { /* it's immediate but unknown */
1001 op->type |= IMMEDIATE;
1002 op->opflags |= OPFLAG_UNKNOWN;
1003 op->offset = 0; /* don't care */
1004 op->segment = NO_SEG; /* don't care again */
1005 op->wrt = NO_SEG; /* still don't care */
1007 if(optimizing >= 0 && !(op->type & STRICT)) {
1010 UNITY | SBYTEWORD | SBYTEDWORD | UDWORD | SDWORD;
1012 } else if (is_reloc(value)) { /* it's immediate */
1013 op->type |= IMMEDIATE;
1014 op->offset = reloc_value(value);
1015 op->segment = reloc_seg(value);
1016 op->wrt = reloc_wrt(value);
1018 if (is_simple(value)) {
1019 uint64_t n = reloc_value(value);
1022 if (optimizing >= 0 &&
1023 !(op->type & STRICT)) {
1024 if ((uint32_t) (n + 128) <= 255)
1025 op->type |= SBYTEDWORD;
1026 if ((uint16_t) (n + 128) <= 255)
1027 op->type |= SBYTEWORD;
1028 if (n <= 0xFFFFFFFF)
1030 if (n + 0x80000000 <= 0xFFFFFFFF)
1034 } else if(value->type == EXPR_RDSAE) {
1036 * it's not an operand but a rounding or SAE decorator.
1037 * put the decorator information in the (opflag_t) type field
1038 * of previous operand.
1041 switch (value->value) {
1047 op->decoflags |= (value->value == BRC_SAE ? SAE : ER);
1048 result->evex_rm = value->value;
1051 nasm_error(ERR_NONFATAL, "invalid decorator");
1054 } else { /* it's a register */
1057 if (value->type >= EXPR_SIMPLE || value->value != 1) {
1058 nasm_error(ERR_NONFATAL, "invalid operand type");
1063 * check that its only 1 register, not an expression...
1065 for (i = 1; value[i].type; i++)
1066 if (value[i].value) {
1067 nasm_error(ERR_NONFATAL, "invalid operand type");
1071 /* clear overrides, except TO which applies to FPU regs */
1072 if (op->type & ~TO) {
1074 * we want to produce a warning iff the specified size
1075 * is different from the register size
1077 rs = op->type & SIZE_MASK;
1082 op->type |= REGISTER;
1083 op->type |= nasm_reg_flags[value->type];
1084 op->decoflags |= brace_flags;
1085 op->basereg = value->type;
1087 if (rs && (op->type & SIZE_MASK) != rs)
1088 nasm_error(ERR_WARNING | ERR_PASS1,
1089 "register size specification ignored");
1093 /* remember the position of operand having broadcasting/ER mode */
1094 if (op->decoflags & (BRDCAST_MASK | ER | SAE))
1095 result->evex_brerop = opnum;
1098 result->operands = opnum; /* set operand count */
1100 /* clear remaining operands */
1101 while (opnum < MAX_OPERANDS)
1102 result->oprs[opnum++].type = 0;
1105 * Transform RESW, RESD, RESQ, REST, RESO, RESY, RESZ into RESB.
1107 switch (result->opcode) {
1109 result->opcode = I_RESB;
1110 result->oprs[0].offset *= 2;
1113 result->opcode = I_RESB;
1114 result->oprs[0].offset *= 4;
1117 result->opcode = I_RESB;
1118 result->oprs[0].offset *= 8;
1121 result->opcode = I_RESB;
1122 result->oprs[0].offset *= 10;
1125 result->opcode = I_RESB;
1126 result->oprs[0].offset *= 16;
1129 result->opcode = I_RESB;
1130 result->oprs[0].offset *= 32;
1133 result->opcode = I_RESB;
1134 result->oprs[0].offset *= 64;
1143 result->opcode = I_none;
1147 static int is_comma_next(void)
1154 i = stdscan(NULL, &tv);
1157 return (i == ',' || i == ';' || !i);
1160 void cleanup_insn(insn * i)
1164 while ((e = i->eops)) {
1166 if (e->type == EOT_DB_STRING_FREE)
1167 nasm_free(e->stringval);