[Bug gas/18638] Wrong code generated for VMOVQ and VGATHER... on x86 CPU

[m at rolle dot name]

https://sourceware.org/bugzilla/show_bug.cgi?id=18638

--- Comment #4 from Michael Rolle <m at rolle dot name> ---
In the first case, I got the correct results when I assembled the .s file.  The
file was  gas/i386/x86-64-avx-scalar.s in the gas/testsuite directory.  objdump
of the resulting .o file show the correct bytes.

Earlier, I was looking at a directory of .o files that I made a while back,
running the testsuite and saving the .o files.  I don't recall how I generated
these.  However, looking at the regression file  gas/i386/x86-64-avx-scalar.d,
this file has the lines:

[       ]*[a-f0-9]+:    c4 e1 fd 7e e1          vmovq  %xmm4,%rcx
[       ]*[a-f0-9]+:    c4 e1 fd 6e e1          vmovq  %rcx,%xmm4
[       ]*[a-f0-9]+:    c4 e1 fd 7e e1          vmovq  %xmm4,%rcx
[       ]*[a-f0-9]+:    c4 e1 fd 6e e1          vmovq  %rcx,%xmm4

I must have gotten some older version of the testsuite that runs an older
version of gas, which you can see does have the bug I reported.  If it helps
you figure out which version it is, the dates on the files are all dated 2 July
2014, and I am using Cygwin as the platform.

When I run as directly, the version is:
GNU assembler version 2.24.51 (x86_64-pc-cygwin) using BFD version (GNU
Binutils) 2.24.51.20140703

If you have the time, maybe you could figure out how come the testsuite that I
have is wrong and correct the problem.

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