From: Richard Henderson <rth@twiddle.net>
To: Will Newton <will.newton@linaro.org>
Cc: QEMU Developers <qemu-devel@nongnu.org>,
Patch Tracking <patches@linaro.org>
Subject: Re: [Qemu-devel] [PATCH v2] target-arm: Implement ARMv8 VSEL instruction.
Date: Thu, 03 Oct 2013 13:39:33 -0500 [thread overview]
Message-ID: <524DB9E5.60501@twiddle.net> (raw)
In-Reply-To: <524D8D09.3050808@twiddle.net>
On 10/03/2013 10:28 AM, Richard Henderson wrote:
> For the simple conditions, yes. For the more complex ones,
> you might want to do the computation in 32-bit and extend
> the result.
Alternately, compute the condition with setcond_i32 and
only extend that result to 64 bits. That means doing
something different with GT with its compound. Maybe
xor_i32 tmp, vf, nf
setcond_i32 tmp, tmp, zero, ge
movcond_i32 tmp, zf, zero, tmp, zero, ne (tmp = z ? tmp : 0)
r~
prev parent reply other threads:[~2013-10-03 18:40 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-03 12:51 [Qemu-devel] [PATCH v2] target-arm: Implement ARMv8 VSEL instruction Will Newton
2013-10-03 12:59 ` Peter Maydell
2013-10-03 14:31 ` Will Newton
2013-10-03 14:37 ` Peter Maydell
2013-10-15 10:31 ` Peter Maydell
2013-10-03 14:34 ` Richard Henderson
2013-10-03 15:10 ` Will Newton
2013-10-03 15:28 ` Richard Henderson
2013-10-03 18:39 ` Richard Henderson [this message]
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