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Thu Aug 20 23:17:04 1998 Alan Modra <alan@spri.levels.unisa.edu.au>

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* config/tc-i386.c (md_assemble): Only warn for address/data size
	prefixes.
This commit is contained in:
Ian Lance Taylor
1998-08-21 03:18:04 +00:00
parent 774852e913
commit 61c49d6652
2 changed files with 37 additions and 13 deletions
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5
gas/ChangeLog
View File

@ -1,3 +1,8 @@
Thu Aug 20 23:17:04 1998 Alan Modra <alan@spri.levels.unisa.edu.au>
* config/tc-i386.c (md_assemble): Only warn for address/data size
prefixes.
start-sanitize-armelf start-sanitize-armelf
Thu Aug 20 14:45:08 1998 Nick Clifton <nickc@cygnus.com> Thu Aug 20 14:45:08 1998 Nick Clifton <nickc@cygnus.com>

45
gas/config/tc-i386.c
View File

@ -48,7 +48,7 @@
#define SCALE1_WHEN_NO_INDEX 1 #define SCALE1_WHEN_NO_INDEX 1
#endif #endif
static unsigned long mode_from_disp_size PARAMS ((unsigned long)); static unsigned int mode_from_disp_size PARAMS ((unsigned int));
static int fits_in_signed_byte PARAMS ((long)); static int fits_in_signed_byte PARAMS ((long));
static int fits_in_unsigned_byte PARAMS ((long)); static int fits_in_unsigned_byte PARAMS ((long));
static int fits_in_unsigned_word PARAMS ((long)); static int fits_in_unsigned_word PARAMS ((long));
@ -382,9 +382,9 @@ static void s_bss PARAMS ((int));
symbolS *GOT_symbol; /* Pre-defined "_GLOBAL_OFFSET_TABLE_" */ symbolS *GOT_symbol; /* Pre-defined "_GLOBAL_OFFSET_TABLE_" */
static INLINE unsigned long static INLINE unsigned int
mode_from_disp_size (t) mode_from_disp_size (t)
unsigned long t; unsigned int t;
{ {
return (t & Disp8) ? 1 : (t & (Disp16|Disp32)) ? 2 : 0; return (t & Disp8) ? 1 : (t & (Disp16|Disp32)) ? 2 : 0;
} }
@ -941,6 +941,7 @@ md_assemble (line)
current_templates = hash_find (op_hash, opcode); current_templates = hash_find (op_hash, opcode);
if (*l != END_OF_INSN if (*l != END_OF_INSN
&& (! is_space_char (*l) || l[1] != END_OF_INSN)
&& current_templates && current_templates
&& (current_templates->start->opcode_modifier & IsPrefix)) && (current_templates->start->opcode_modifier & IsPrefix))
{ {
@ -1217,6 +1218,13 @@ md_assemble (line)
return; return;
} }
if ((t->opcode_modifier & (IsPrefix|IgnoreSize)) == (IsPrefix|IgnoreSize))
{
/* Warn them that a data or address size prefix doesn't affect
assembly of the next line of code. */
as_warn (_("stand-alone `%s' prefix"), t->name);
}
/* Copy the template we found. */ /* Copy the template we found. */
i.tm = *t; i.tm = *t;
if (found_reverse_match) if (found_reverse_match)
@ -1806,7 +1814,7 @@ md_assemble (line)
/* Output jumps. */ /* Output jumps. */
if (i.tm.opcode_modifier & Jump) if (i.tm.opcode_modifier & Jump)
{ {
unsigned long n = i.disps[0]->X_add_number; long n = (long) i.disps[0]->X_add_number;
int prefix = (i.prefix[DATA_PREFIX] != 0); int prefix = (i.prefix[DATA_PREFIX] != 0);
int code16 = 0; int code16 = 0;
@ -1892,7 +1900,7 @@ md_assemble (line)
else if (i.tm.opcode_modifier & (JumpByte | JumpDword)) else if (i.tm.opcode_modifier & (JumpByte | JumpDword))
{ {
int size = (i.tm.opcode_modifier & JumpByte) ? 1 : 4; int size = (i.tm.opcode_modifier & JumpByte) ? 1 : 4;
unsigned long n = i.disps[0]->X_add_number; long n = (long) i.disps[0]->X_add_number;
if (size == 1) /* then this is a loop or jecxz type instruction */ if (size == 1) /* then this is a loop or jecxz type instruction */
{ {
@ -1941,7 +1949,7 @@ md_assemble (line)
{ {
if (size == 1 && !fits_in_signed_byte (n)) if (size == 1 && !fits_in_signed_byte (n))
{ {
as_bad (_("`%s' only takes byte displacement; %lu shortened to %d"), as_bad (_("`%s' only takes byte displacement; %ld shortened to %d"),
i.tm.name, n, *p); i.tm.name, n, *p);
} }
else if (size == 2 && !fits_in_signed_word (n)) else if (size == 2 && !fits_in_signed_word (n))
@ -1991,7 +1999,8 @@ md_assemble (line)
*p++ = i.tm.base_opcode; *p++ = i.tm.base_opcode;
if (i.imms[1]->X_op == O_constant) if (i.imms[1]->X_op == O_constant)
{ {
unsigned long n = i.imms[1]->X_add_number; long n = (long) i.imms[1]->X_add_number;
if (size == 2 && !fits_in_unsigned_word (n)) if (size == 2 && !fits_in_unsigned_word (n))
{ {
as_bad (_("16-bit jump out of range")); as_bad (_("16-bit jump out of range"));
@ -2356,6 +2365,17 @@ i386_operand (operand_string)
{ {
i.types[this_operand] |= i.types[this_operand] |=
smallest_imm_type ((long) exp->X_add_number); smallest_imm_type ((long) exp->X_add_number);
/* If a suffix is given, this operand may be shortened. */
switch (i.suffix)
{
case WORD_OPCODE_SUFFIX:
i.types[this_operand] |= Imm16;
break;
case BYTE_OPCODE_SUFFIX:
i.types[this_operand] |= Imm16 | Imm8 | Imm8S;
break;
}
} }
#ifdef OBJ_AOUT #ifdef OBJ_AOUT
else if (exp_seg != text_section else if (exp_seg != text_section
@ -2368,7 +2388,7 @@ i386_operand (operand_string)
) )
{ {
seg_unimplemented: seg_unimplemented:
as_bad (_("Unimplemented segment type %d in parse_operand"), exp_seg); as_bad (_("Unimplemented segment type %d in operand"), exp_seg);
return 0; return 0;
} }
#endif #endif
@ -2465,12 +2485,11 @@ i386_operand (operand_string)
see it. */ see it. */
END_STRING_AND_SAVE (end_of_operand_string); END_STRING_AND_SAVE (end_of_operand_string);
i.base_reg = parse_register (base_string, &end_op); i.base_reg = parse_register (base_string, &end_op);
if (i.base_reg == NULL)
{
RESTORE_END_STRING (end_of_operand_string);
return 0;
}
RESTORE_END_STRING (end_of_operand_string); RESTORE_END_STRING (end_of_operand_string);
if (i.base_reg == NULL)
return 0;
base_string = end_op; base_string = end_op;
if (is_space_char (*base_string)) if (is_space_char (*base_string))
++base_string; ++base_string;