bash-3.1$ cat x.s
insertq $4,$2,%xmm2,%xmm1
insertq $4,$2,%xmm2,%ebx
bash-3.1$ gcc -c x.s
bash-3.1$ objdump -d x.o
x.o: file format elf64-x86-64
Disassembly of section .text:
0000000000000000 <.text>:
0: f2 0f 78 ca 02 04 insertq $0x4,$0x2,%xmm2,%xmm1
6: f2 0f 78 da 02 04 insertq $0x4,$0x2,%xmm2,%xmm3
bash-3.1$
--
Summary: i386 assembler accepts invalid assembly code
Product: binutils
Version: 2.18 (HEAD)
Status: NEW
Severity: normal
Priority: P2
Component: gas
AssignedTo: unassigned at sources dot redhat dot com
ReportedBy: hjl at lucon dot org
CC: bug-binutils at gnu dot org
http://sourceware.org/bugzilla/show_bug.cgi?id=3712
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