diff options
Diffstat (limited to 'gas/config/tc-i386.c')
| -rw-r--r-- | gas/config/tc-i386.c | 35 |
1 files changed, 25 insertions, 10 deletions
diff --git a/gas/config/tc-i386.c b/gas/config/tc-i386.c index 1828c48..b95a664 100644 --- a/gas/config/tc-i386.c +++ b/gas/config/tc-i386.c @@ -2275,10 +2275,15 @@ match_template () overlap1 = i.types[1] & t->operand_types[1]; if (!MATCH (overlap0, i.types[0], t->operand_types[0]) || !MATCH (overlap1, i.types[1], t->operand_types[1]) - || !CONSISTENT_REGISTER_MATCH (overlap0, i.types[0], - t->operand_types[0], - overlap1, i.types[1], - t->operand_types[1])) + /* monitor in SSE3 is a very special case. The first + register and the second register may have differnet + sizes. */ + || !((t->base_opcode == 0x0f01 + && t->extension_opcode == 0xc8) + || CONSISTENT_REGISTER_MATCH (overlap0, i.types[0], + t->operand_types[0], + overlap1, i.types[1], + t->operand_types[1]))) { /* Check if other direction is valid ... */ if ((t->opcode_modifier & (D | FloatD)) == 0) @@ -2546,12 +2551,22 @@ process_suffix (void) /* Now select between word & dword operations via the operand size prefix, except for instructions that will ignore this prefix anyway. */ - if (i.suffix != QWORD_MNEM_SUFFIX - && i.suffix != LONG_DOUBLE_MNEM_SUFFIX - && !(i.tm.opcode_modifier & (IgnoreSize | FloatMF)) - && ((i.suffix == LONG_MNEM_SUFFIX) == (flag_code == CODE_16BIT) - || (flag_code == CODE_64BIT - && (i.tm.opcode_modifier & JumpByte)))) + if (i.tm.base_opcode == 0x0f01 && i.tm.extension_opcode == 0xc8) + { + /* monitor in SSE3 is a very special case. The default size + of AX is the size of mode. The address size override + prefix will change the size of AX. */ + if (i.op->regs[0].reg_type & + (flag_code == CODE_32BIT ? Reg16 : Reg32)) + if (!add_prefix (ADDR_PREFIX_OPCODE)) + return 0; + } + else if (i.suffix != QWORD_MNEM_SUFFIX + && i.suffix != LONG_DOUBLE_MNEM_SUFFIX + && !(i.tm.opcode_modifier & (IgnoreSize | FloatMF)) + && ((i.suffix == LONG_MNEM_SUFFIX) == (flag_code == CODE_16BIT) + || (flag_code == CODE_64BIT + && (i.tm.opcode_modifier & JumpByte)))) { unsigned int prefix = DATA_PREFIX_OPCODE; |