http://llvm.org/bugs/show_bug.cgi?id=10807
Summary: [x86 disassembler] vmaskmovpd is not disassembled
Product: libraries
Version: trunk
Platform: PC
OS/Version: All
Status: NEW
Severity: normal
Priority: P
Component: Backend: X86
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
From the "Intel® 64 and IA-32 Architectures Software Developer’s Manual
Volume 2 (2A & 2B): Instruction Set Reference, A-Z", p. 3-612:
VEX.NDS.128.66.0F38.W0 2F /r
VMASKMOVPD m128, xmm1, xmm2
clang on OSX correctly assembles the following):
vmaskmovpd %xmm0, %xmm1, (%eax)
The object file shows:
C4 E2 71 2F 00
But using llvm-mc built from trunk r138250, this byte sequence doesn't
disassemble:
$ echo '0xc4 0xe2 0x71 0x2f 0x00'| ./llvm-mc -disassemble -triple="x86_64"
<stdin>:1:1: warning: invalid instruction encoding
0xc4 0xe2 0x71 0x2f 0x00
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