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Re: [PATCH, alpha]: Add earlyclobber to sqrtt/sqrtf insns.
- From: Florian Weimer <fw at deneb dot enyo dot de>
- To: Uros Bizjak <ubizjak at gmail dot com>
- Cc: libc-alpha at sourceware dot org, Richard Henderson <rth at twiddle dot net>
- Date: Fri, 14 Apr 2017 14:38:44 +0200
- Subject: Re: [PATCH, alpha]: Add earlyclobber to sqrtt/sqrtf insns.
- Authentication-results: sourceware.org; auth=none
- References: <CAFULd4bRa44uFd4uvFa3AzfJnX-6sJpB4ZtWPjXYxf3P2i-SeA@mail.gmail.com>
* Uros Bizjak:
> Add earlyclobber to sqrtt/sqrtf insns.
>
> When using software completions, we have to prevent assembler to match
> input and output operands of sqrtt/sqrtf insn. Add earlyclobber to
> output operand to avoid unwanted operand matching.
Is this so that the trap handler can recover the original input?
In this case, please add this to the commit message for those of us
who are not familiar with the Alpha architecture.