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: Sat, 22 Feb 2020 08:37:08 +0100 [thread overview]
Message-ID: <2ab8ed82-dadd-2d5e-5bbc-69a67ba89e26@redhat.com> (raw)
In-Reply-To: <f3bea474-468b-5818-9f69-5463be6d9b2a@emindsoft.com.cn>
On 22/02/20 03:10, Chen Gang wrote:
> Set C1 to 1 if stack overflow occurred; set to 0 otherwise".
>
> In helper_fxam_ST0, I guess, we need "env->fpus |= 0x200" (but I don't
> know wheter it will be conflict with SIGND(temp)). And we have to still
> need foverflow, because all env->fptags being 0 doesn't mean overflow.
No, you need to add "env->fpus |= 0x200" and "env->fpus &= ~0x200"
directly to fpush, fpop, etc.
Polo
next prev parent reply other threads:[~2020-02-22 7:37 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
2020-02-22 2:10 ` Chen Gang
2020-02-22 2:27 ` Chen Gang
2020-02-22 7:37 ` Paolo Bonzini [this message]
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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