https://sourceware.org/bugzilla/show_bug.cgi?id=24700
Bug ID: 24700
Summary: objdump fails to reject invalid
vbroadcasti32x8/vbroadcasti64x4 encodings.
Product: binutils
Version: 2.32
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: binutils
Assignee: unassigned at sourceware dot org
Reporter: hgreving at google dot com
Target Milestone: ---
Similar to previously filed issue.
llvm-mc-7 seems to handle it correctly:
e.g.
echo '0x62 0xf2 0x7d 0x28 0x5b 0x41 0x37' | /usr/bin/llvm-mc-7 -disassemble
-triple=x86_64
.text
<stdin>:1:1: warning: invalid instruction encoding
0x62 0xf2 0x7d 0x28 0x5b 0x41 0x37
^
<stdin>:1:26: warning: invalid instruction encoding
0x62 0xf2 0x7d 0x28 0x5b 0x41 0x37
The instruction only supports EVEX.L' == 0b1 && EVEX.L == 0b1.
objdump accepts it:
40048b: 62 f2 7d 28 5b 41 37 vbroadcasti32x8 0x370(%rcx),%ymm0
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