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| author | Jan Beulich <jbeulich@novell.com> | 2018-03-22 08:33:38 +0100 |
|---|---|---|
| committer | Jan Beulich <jbeulich@suse.com> | 2018-03-22 08:33:38 +0100 |
| commit | 1212781b35c9e0080db6ee546cf5e7ebd45d6b09 (patch) | |
| tree | 7d24149d4ea3e771f626f33ad9824c1e2b2c6be3 /gas/config | |
| parent | 9f79e88693dae859f838bcf684158e6e6f8f3b6b (diff) | |
| download | gdb-1212781b35c9e0080db6ee546cf5e7ebd45d6b09.zip gdb-1212781b35c9e0080db6ee546cf5e7ebd45d6b09.tar.gz gdb-1212781b35c9e0080db6ee546cf5e7ebd45d6b09.tar.bz2 | |
ix86: allow HLE store of accumulator to absolute address
Since they're shorter to encode, the 0xa0...0xa3 encodings are preferred
for moves between accumulator and absolute address outside of 64-bit
mode. With HLE release semantics this encoding is unsupported though,
with the assembler raising an error. The operation is valid though, we
merely need to pick the longer encoding in that case.
Diffstat (limited to 'gas/config')
| -rw-r--r-- | gas/config/tc-i386.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/gas/config/tc-i386.c b/gas/config/tc-i386.c index 8905de4..1a05f48 100644 --- a/gas/config/tc-i386.c +++ b/gas/config/tc-i386.c @@ -5427,6 +5427,14 @@ match_template (char mnem_suffix) && operand_type_equal (&i.types [0], &acc32) && operand_type_equal (&i.types [1], &acc32)) continue; + /* xrelease mov %eax, <disp> is another special case. It must not + match the accumulator-only encoding of mov. */ + if (flag_code != CODE_64BIT + && i.hle_prefix + && t->base_opcode == 0xa0 + && i.types[0].bitfield.acc + && operand_type_check (i.types[1], anymem)) + continue; /* If we want store form, we reverse direction of operands. */ if (i.dir_encoding == dir_encoding_store && t->opcode_modifier.d) |