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| author | Jan Beulich <jbeulich@suse.com> | 2024-09-11 13:52:42 +0200 |
|---|---|---|
| committer | Jan Beulich <jbeulich@suse.com> | 2024-09-11 13:52:42 +0200 |
| commit | 6170a088a60e159f2ab8ac1ae1edab7d04e079ec (patch) | |
| tree | eb144bc4faaf8672408ec72241b36d3ae78f4a7d | |
| parent | b7ee8ec914c612587b080e9ad416315307f094fd (diff) | |
| download | gdb-6170a088a60e159f2ab8ac1ae1edab7d04e079ec.zip gdb-6170a088a60e159f2ab8ac1ae1edab7d04e079ec.tar.gz gdb-6170a088a60e159f2ab8ac1ae1edab7d04e079ec.tar.bz2 | |
x86/APX: correct disassembly for EVEX.B4
EVEX.B4 is used only for GPR (or addressing of memory) operands. SIMD
registers encoded via ModR/M.rm (when ModR/M.mod == 3) have their top
bit in EVEX.X3. Supposedly (doc version 004) EVEX.B4 is ignored when
unused, hence also don't flag such encodings as invalid.
| -rw-r--r-- | opcodes/i386-dis.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/opcodes/i386-dis.c b/opcodes/i386-dis.c index 26d667a..e2c7b1b 100644 --- a/opcodes/i386-dis.c +++ b/opcodes/i386-dis.c @@ -13012,14 +13012,15 @@ OP_EX (instr_info *ins, int bytemode, int sizeflag) USED_REX (REX_B); if (ins->rex & REX_B) reg += 8; - if (ins->rex2 & REX_B) - reg += 16; if (ins->vex.evex) { USED_REX (REX_X); if ((ins->rex & REX_X)) reg += 16; + ins->rex2_used &= ~REX_B; } + else if (ins->rex2 & REX_B) + reg += 16; if ((sizeflag & SUFFIX_ALWAYS) && (bytemode == x_swap_mode |