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| author | Jan Beulich <jbeulich@suse.com> | 2024-06-10 10:46:21 +0200 |
|---|---|---|
| committer | Jan Beulich <jbeulich@suse.com> | 2024-06-10 10:46:21 +0200 |
| commit | d1c2dd6f4de7ec0761fcf89c95342da72826329b (patch) | |
| tree | e96860ab0e66182d64ae8a69d1723c4912d18728 /gas | |
| parent | cf037c0de24990ed2a0d9fabe8994dbd3c0e303e (diff) | |
| download | gdb-d1c2dd6f4de7ec0761fcf89c95342da72826329b.zip gdb-d1c2dd6f4de7ec0761fcf89c95342da72826329b.tar.gz gdb-d1c2dd6f4de7ec0761fcf89c95342da72826329b.tar.bz2 | |
x86/APX: convert ZU to operand constraint
Extremely rarely used attributes are inefficient when represented by a
separate attribute. Convert it to an operand constraint, as already
suggested during review. The collision with RegKludge is pretty simple
to resolve.
Diffstat (limited to 'gas')
| -rw-r--r-- | gas/config/tc-i386.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/gas/config/tc-i386.c b/gas/config/tc-i386.c index 95f5810..e0c6964 100644 --- a/gas/config/tc-i386.c +++ b/gas/config/tc-i386.c @@ -4287,7 +4287,7 @@ build_apx_evex_prefix (void) /* Encode the NDD bit of the instruction promoted from the legacy space. ZU shares the same bit with NDD. */ if ((i.vex.register_specifier && i.tm.opcode_space == SPACE_EVEXMAP4) - || i.tm.opcode_modifier.zu) + || i.tm.opcode_modifier.operandconstraint == ZERO_UPPER) i.vex.bytes[3] |= 0x10; /* Encode the NF bit. */ @@ -10301,6 +10301,10 @@ process_operands (void) i.types[first_reg_op + 1] = i.types[first_reg_op]; i.operands++; i.reg_operands++; + + /* For IMULZU switch around the constraint. */ + if (i.tm.mnem_off == MN_imulzu) + i.tm.opcode_modifier.operandconstraint = ZERO_UPPER; } if (i.tm.opcode_modifier.modrm) |