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Re: [PATCH v2] target/i386: reimplement fpatan using floatx80 operations
From: |
Paolo Bonzini |
Subject: |
Re: [PATCH v2] target/i386: reimplement fpatan using floatx80 operations |
Date: |
Tue, 23 Jun 2020 02:33:19 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.6.0 |
On 23/06/20 02:01, Joseph Myers wrote:
> The x87 fpatan emulation is currently based around conversion to
> double. This is inherently unsuitable for a good emulation of any
> floatx80 operation. Reimplement using the soft-float operations, as
> for other such instructions.
>
> Signed-off-by: Joseph Myers <joseph@codesourcery.com>
Queued, thanks.
Just one question: do recent processors still use the same CORDIC
approximations as the 8087, and if so would it be better or simpler to
do that instead of using a good implementation such as this one?
Thanks,
Paolo
- [PATCH v2] target/i386: reimplement fpatan using floatx80 operations, Joseph Myers, 2020/06/22
- Re: [PATCH v2] target/i386: reimplement fpatan using floatx80 operations, Paolo Bonzini, 2020/06/22
- Re: [PATCH v2] target/i386: reimplement fpatan using floatx80 operations,
Paolo Bonzini <=
- Re: [PATCH v2] target/i386: reimplement fpatan using floatx80 operations, no-reply, 2020/06/22
- Re: [PATCH v2] target/i386: reimplement fpatan using floatx80 operations, no-reply, 2020/06/22
- Re: [PATCH v2] target/i386: reimplement fpatan using floatx80 operations, no-reply, 2020/06/22
- Re: [PATCH v2] target/i386: reimplement fpatan using floatx80 operations, no-reply, 2020/06/22