http://llvm.org/bugs/show_bug.cgi?id=10678
Summary: [x86 disassembler] vandpd 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. 3-67:
VEX.NDS.128.66.0F.WIG 54 /r
VANDPD xmm1, xmm2, xmm3/m128
VEX.NDS.256.66.0F.WIG 54 /r
VANDPD ymm1, ymm2, ymm3/m256
'VANDPD' can be specified with either the 2- or 3-byte VEX prefix (clang on OSX
correctly assembles the following):
vandpd %xmm2, %xmm1, %xmm3
vandpd %ymm13, %ymm1, %ymm0
The object file shows:
C5 F1 54 DA
C4 C1 75 54 C5
But using llvm-mc built from trunk revision 135913 produces the wrong output
for these byte sequences:
$ echo '0xc5 0xf1 0x54 0xda'| ./llvm-mc -disassemble -triple="x86_64"
andps %xmm2, %xmm3
$ echo '0xc4 0xc1 0x75 0x54 0xc5'| ./llvm-mc -disassemble -triple="x86_64"
andps %xmm13, %xmm0
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