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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - implement -ffixed-* for q* registers"
href="https://bugs.llvm.org/show_bug.cgi?id=42974">42974</a>
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<th>Summary</th>
<td>implement -ffixed-* for q* registers
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<th>Product</th>
<td>libraries
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<th>Version</th>
<td>trunk
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<th>Hardware</th>
<td>PC
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<th>OS</th>
<td>Linux
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>enhancement
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>Backend: AArch64
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>ndesaulniers@google.com
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<th>CC</th>
<td>arnaud.degrandmaison@arm.com, llvm-bugs@lists.llvm.org, peter.smith@linaro.org, Ties.Stuij@arm.com
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<pre>For the aarch64 Linux kernel, we recently considered the use of -ffixed-* for
q* (NEON SIMD) registers. [0]
Currently, LLVM and Clang support -ffixed- for most x* registers [1], but not
any q* registers.
It's probably not too much work to implement this now in a similar fashion to
the x* registers, especially now with the monorepo.
[0] <a href="https://www.spinics.net/lists/linux-crypto/msg41373.html">https://www.spinics.net/lists/linux-crypto/msg41373.html</a>
[1] see r342100</pre>
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