From: Richard Henderson <rth@twiddle.net>
To: Nathan Froyd <froydnj@codesourcery.com>
Cc: Peter Maydell <peter.maydell@linaro.org>, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [PATCH 08/12] ARM: Return correct result for single<->double conversion of NaN
Date: Wed, 01 Dec 2010 09:52:13 -0800 [thread overview]
Message-ID: <4CF68B4D.9010401@twiddle.net> (raw)
In-Reply-To: <20101201153944.GG24280@codesourcery.com>
On 12/01/2010 07:39 AM, Nathan Froyd wrote:
> RTH (CC'd) is the expert on the Alpha bits.
The Alpha cmptun is supposed to return true for both Q+SNaN.
Although, Invalid Operand is supposed to be raised for SNaN,
which is not happening here in helper_cmptun. Or, indeed,
any of the comparison helper functions.
I think I've lost the thread a bit -- is the proposal to
replace the existing float*_is_nan with _is_quiet_nan and
invent a new function that returns true for both Q+S? That
at least would be monotonic improvement for Alpha, although
as noted above not 100% correct.
r~
next prev parent reply other threads:[~2010-12-01 19:12 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-23 18:53 [Qemu-devel] [PATCH 00/12] [PULL] ARM fixes Peter Maydell
2010-11-23 18:53 ` [Qemu-devel] [PATCH 01/12] target-arm: Add support for PKHxx in thumb2 Peter Maydell
2010-11-29 18:43 ` Nathan Froyd
2010-11-23 18:53 ` [Qemu-devel] [PATCH 02/12] target-arm: Fix mixup in decoding of saturating add and sub Peter Maydell
2010-11-29 17:01 ` Nathan Froyd
2010-11-23 18:53 ` [Qemu-devel] [PATCH 03/12] target-arm: Handle 'smc' as an undefined instruction Peter Maydell
2010-11-29 18:23 ` Nathan Froyd
2010-11-23 18:53 ` [Qemu-devel] [PATCH 04/12] ARM: Fix decoding of VFP forms of VCVT between float and int/fixed Peter Maydell
2010-11-23 18:53 ` [Qemu-devel] [PATCH 05/12] ARM: Fix decoding of Neon forms of VCVT between float and fixed point Peter Maydell
2010-11-29 18:11 ` Nathan Froyd
2010-11-23 18:53 ` [Qemu-devel] [PATCH 06/12] ARM: Fix sense of to_integer bit in Neon VCVT float/int conversion Peter Maydell
2010-11-29 16:34 ` Nathan Froyd
2010-11-23 18:53 ` [Qemu-devel] [PATCH 07/12] ARM: Return correct result for float-to-integer conversion of NaN Peter Maydell
2010-11-29 16:38 ` Nathan Froyd
2010-11-29 16:49 ` Peter Maydell
2010-11-29 16:58 ` Nathan Froyd
2010-11-23 18:53 ` [Qemu-devel] [PATCH 08/12] ARM: Return correct result for single<->double " Peter Maydell
2010-11-29 17:49 ` Nathan Froyd
2010-11-29 19:25 ` Peter Maydell
2010-11-29 19:54 ` Nathan Froyd
2010-11-29 20:04 ` Peter Maydell
2010-11-29 20:21 ` Nathan Froyd
2010-11-30 11:15 ` Peter Maydell
2010-12-01 15:39 ` Nathan Froyd
2010-12-01 17:52 ` Richard Henderson [this message]
2010-12-01 17:54 ` Nathan Froyd
2010-11-23 18:53 ` [Qemu-devel] [PATCH 09/12] ARM: Ignore top 16 bits when doing VCVT from 16 bit fixed point Peter Maydell
2010-11-29 17:02 ` Nathan Froyd
2010-11-23 18:53 ` [Qemu-devel] [PATCH 10/12] softfloat: Add float/double to 16 bit integer conversion functions Peter Maydell
2010-11-29 18:46 ` Nathan Froyd
2010-11-23 18:53 ` [Qemu-devel] [PATCH 11/12] ARM: Implement VCVT to 16 bit integer using new softfloat routines Peter Maydell
2010-11-29 18:47 ` Nathan Froyd
2010-11-23 18:53 ` [Qemu-devel] [PATCH 12/12] ARM: fix ldrexd/strexd Peter Maydell
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