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| author | Jan Beulich <jbeulich@suse.com> | 2024-03-15 10:29:35 +0100 |
|---|---|---|
| committer | Jan Beulich <jbeulich@suse.com> | 2024-03-15 10:29:35 +0100 |
| commit | 9fe07b7f95fbfdaf34d5b69e6d73cae000b43eea (patch) | |
| tree | 86a6fb610ad8e93edf50f4f280769b4342a7d76c /opcodes | |
| parent | 7bb2b9493317714cae731a03828cb97ac74e849f (diff) | |
| download | gdb-9fe07b7f95fbfdaf34d5b69e6d73cae000b43eea.zip gdb-9fe07b7f95fbfdaf34d5b69e6d73cae000b43eea.tar.gz gdb-9fe07b7f95fbfdaf34d5b69e6d73cae000b43eea.tar.bz2 | |
x86/APX: legacy promoted insns can't access %xmm16-%xmm31
Irrespective of the encoding being EVEX, the usable SIMD register range
continues to be limited to %xmm0-%xmm15. Enforce this in gas (but
continue to generate code, as in principle we know how to encode
things) and recognize/flag the case in the disassembler.
Oddly enough wrong forms were actually used in the testsuite (register-
only forms are then really meaningless to test here, and are hence
dropped instead of adjusted).
Convert the POP2 test that needs touching anyway (due to a bad ModR/M
byte having been chosen) to .insn.
Diffstat (limited to 'opcodes')
| -rw-r--r-- | opcodes/i386-dis.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/opcodes/i386-dis.c b/opcodes/i386-dis.c index 31afa9c..d06a918 100644 --- a/opcodes/i386-dis.c +++ b/opcodes/i386-dis.c @@ -12828,6 +12828,11 @@ print_vector_reg (instr_info *ins, unsigned int reg, int bytemode) else names = att_names_xmm; oappend_register (ins, names[reg]); + + /* Legacy insns promoted to EVEX, like the legacy insns themselves, don't + allow use of the upper 16 vector registers. */ + if (ins->evex_type == evex_from_legacy && reg >= 16) + oappend (ins, "(bad)"); } static bool |