diff options
| -rw-r--r-- | gas/ChangeLog | 5 | ||||
| -rw-r--r-- | gas/config/tc-i386.c | 7 |
2 files changed, 9 insertions, 3 deletions
diff --git a/gas/ChangeLog b/gas/ChangeLog index 7a82555..fc17226 100644 --- a/gas/ChangeLog +++ b/gas/ChangeLog @@ -1,3 +1,8 @@ +2018-09-13 H.J. Lu <hongjiu.lu@intel.com> + + * config/tc-i386.c (build_vex_prefix): Swap destination and + source only if there are more than 1 register operand. + 2018-09-13 Jan Beulich <jbeulich@suse.com> * config/tc-i386.c (operand_size_match): Also deal with three diff --git a/gas/config/tc-i386.c b/gas/config/tc-i386.c index 2bff48a..40b4583 100644 --- a/gas/config/tc-i386.c +++ b/gas/config/tc-i386.c @@ -3364,9 +3364,10 @@ build_vex_prefix (const insn_template *t) else register_specifier = 0xf; - /* Use 2-byte VEX prefix by swapping destination and source - operand. */ - if (i.vec_encoding != vex_encoding_vex3 + /* Use 2-byte VEX prefix by swapping destination and source operand + if there are more than 1 register operand. */ + if (i.reg_operands > 1 + && i.vec_encoding != vex_encoding_vex3 && i.dir_encoding == dir_encoding_default && i.operands == i.reg_operands && operand_type_equal (&i.types[0], &i.types[i.operands - 1]) |