diff options
Diffstat (limited to 'gas/config/tc-i386.c')
| -rw-r--r-- | gas/config/tc-i386.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/gas/config/tc-i386.c b/gas/config/tc-i386.c index 2319840..2c61353 100644 --- a/gas/config/tc-i386.c +++ b/gas/config/tc-i386.c @@ -513,6 +513,9 @@ static struct pseudo_prefixes { disp_encoding_32bit } disp_encoding; + /* Exclude sign-extended 8bit immediate in encoding. */ + bool no_imm8s; + /* Prefer the REX byte in encoding. */ bool rex_encoding; @@ -2589,6 +2592,19 @@ operand_size_match (const insn_template *t) /* Check memory and accumulator operand size. */ for (j = 0; j < i.operands; j++) { + /* Instruction templates with only sign-extended 8-bit immediate + operand also have a second template with full-operand-size + immediate operand under a different opcode. Don't match the + first template if sign-extended 8-bit immediate operand should + be excluded. */ + if (pp.no_imm8s + && !t->operand_types[j].bitfield.imm8 + && t->operand_types[j].bitfield.imm8s) + { + match = 0; + break; + } + if (i.types[j].bitfield.class != Reg && i.types[j].bitfield.class != RegSIMD && t->opcode_modifier.operandconstraint == ANY_SIZE) @@ -7764,6 +7780,10 @@ parse_insn (const char *line, char *mnemonic, enum parse_mode mode) /* {nooptimize} */ pp.no_optimize = true; break; + case Prefix_NoImm8s: + /* {noimm8s} */ + pp.no_imm8s = true; + break; default: abort (); } |