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Re: Setting an SSE register to a certain value
- From: Jim Blandy <jimb at red-bean dot com>
- To: Guillaume POIRIER <poirierg at gmail dot com>
- Cc: gdb at sources dot redhat dot com
- Date: Tue, 27 Dec 2005 16:15:59 -0800
- Subject: Re: Setting an SSE register to a certain value
- References: <4e03026a0512270816p2ea883cfj42934c557ec7f4a5@mail.gmail.com>
On 12/27/05, Guillaume POIRIER <poirierg@gmail.com> wrote:
> I'm trying to find a solution to set an XMM register to a certain value.
>
> I've tried
> set $xmm2 = 0x000000000000000000000000FFFFFFFF
> but I get the error message: "Invalid cast."
> and I also tried:
> set $xmm2 = (unint128) 0x000000000000000000000000FFFFFFFF
> but I get the message the message "No symbol "uint128" in current context."
>
> I've googled around and dig the mailing without finding a solution to
> this problem.
If you say "print $xmm", don't you get a structure type? GDB is
complaining that it doesn't know how to convert the 128-bit constant
you wrote to the register's structure type. Try assigning to the
individual elements of one of the structure's members.