From: Paolo Bonzini <pbonzini@redhat.com>
To: Chen Gang <chengang@emindsoft.com.cn>
Cc: qemu-devel@nongnu.org, Chen Gang <gang.chen.5i5j@gmail.com>,
ehabkost@redhat.com, rth@twiddle.net
Subject: Re: [PATCH] target: i386: Check float overflow about register stack
Date: Fri, 21 Feb 2020 17:18:15 +0100 [thread overview]
Message-ID: <d893eac5-0b7a-ddfe-2acf-a6f27ab48ccf@redhat.com> (raw)
In-Reply-To: <900fd511-72f0-675d-4a7e-d228b2ade9c7@emindsoft.com.cn>
On 21/02/20 15:09, Chen Gang wrote:
>> - /* XXX: test fptags too */
>> + if (env->fptags[env->fpstt]) {
>> + env->fpus |= 0x4100; /* Empty */
>> + return;
>> + }
>> +
> For fpop overflow, this fix is enough, but for me, we still need
> foverflow to check fpush/fld*_ST0 overflow.
>
> Don't you think we need check fpush/f[i]ld*_ST0 overflow?
After fld/fild or any other push, FXAM ST0 should not return empty in my
opinion.
Paolo
next prev parent reply other threads:[~2020-02-21 16:19 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-21 3:45 [PATCH] target: i386: Check float overflow about register stack chengang
2020-02-21 8:58 ` Paolo Bonzini
2020-02-21 14:09 ` Chen Gang
2020-02-21 16:18 ` Paolo Bonzini [this message]
2020-02-22 2:10 ` Chen Gang
2020-02-22 2:27 ` Chen Gang
2020-02-22 7:37 ` Paolo Bonzini
2020-02-22 12:25 ` Chen Gang
2020-02-24 12:43 ` Paolo Bonzini
2020-02-25 1:22 ` Chen Gang
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