From: Peter Bergner <bergner@linux.ibm.com>
To: jacob navia <jacob@jacob.remcomp.fr>, binutils@sourceware.org
Subject: Re: Defined illegal instruction
Date: Fri, 9 Feb 2024 11:21:19 -0600 [thread overview]
Message-ID: <6c936101-c79a-40b0-b627-cc6d8e741d43@linux.ibm.com> (raw)
In-Reply-To: <4EF79A76-0C4A-492C-95E5-F12B338F637D@jacob.remcomp.fr>
On 2/9/24 11:03 AM, jacob navia wrote:
> The riscv processor defines an illegal instruction (all zeroes). I do not
> find the mnemonic used by gas for this. As far as I remember, the x86 also
> has a defined illegal instruction.
I can't speak for riscv or x86, but Power also defines a 32-bit all zero
instruction as an illegal instruction. We do not have a mnemonic for it
though. When we want to emit that into the instruction stream, we just
emit a ".long 0" assembler directive. Maybe the other architectures do
the same thing?
Peter
next prev parent reply other threads:[~2024-02-09 17:47 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-09 17:03 jacob navia
2024-02-09 17:21 ` Peter Bergner [this message]
2024-02-10 0:03 ` Andrew Waterman
2024-02-10 12:56 ` jacob navia
2024-02-11 0:50 ` Andrew Waterman
2024-02-12 7:29 ` Jan Beulich
[not found] ` <C47C292B-6017-4D1C-BEEC-E4D9D88BBD8E@jacob.remcomp.fr>
2024-02-13 7:20 ` Jan Beulich
2024-02-13 9:05 ` jacob navia
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