From: Richard Henderson <rth@twiddle.net>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [PATCH 10/14] i386: use inverted setcond when computing NS or NZ
Date: Tue, 09 Oct 2012 12:17:14 -0700 [thread overview]
Message-ID: <5074783A.2080807@twiddle.net> (raw)
In-Reply-To: <1349526621-13939-11-git-send-email-pbonzini@redhat.com>
On 10/06/2012 05:30 AM, Paolo Bonzini wrote:
> Make gen_compute_eflags_z and gen_compute_eflags_s able to compute the
> inverted condition, and use this in gen_setcc_slow_T0. We cannot do it
> yet in gen_compute_eflags_c, but prepare the code for it anyway. It is
> not worthwhile for PF, as usual.
>
> shr+and+xor could be replaced by and+setcond. I'm not doing it yet.
>
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
r~
next prev parent reply other threads:[~2012-10-09 19:17 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-06 12:30 [Qemu-devel] [CFT PATCH 00/14] Improve handling of x86 condition codes (tcg) Paolo Bonzini
2012-10-06 12:30 ` [Qemu-devel] [PATCH 01/14] i386: use OT_* consistently Paolo Bonzini
2012-10-07 18:50 ` Blue Swirl
2012-10-09 18:58 ` Richard Henderson
2012-10-06 12:30 ` [Qemu-devel] [PATCH 02/14] i386: introduce gen_ext_tl Paolo Bonzini
2012-10-07 18:53 ` Blue Swirl
2012-10-09 18:58 ` Richard Henderson
2012-10-06 12:30 ` [Qemu-devel] [PATCH 03/14] i386: factor setting of s->cc_op handling for string functions Paolo Bonzini
2012-10-09 18:59 ` Richard Henderson
2012-10-06 12:30 ` [Qemu-devel] [PATCH 04/14] i386: drop cc_op argument of gen_jcc1 Paolo Bonzini
2012-10-09 18:59 ` Richard Henderson
2012-10-06 12:30 ` [Qemu-devel] [PATCH 05/14] i386: move eflags computation closer to gen_op_set_cc_op Paolo Bonzini
2012-10-09 19:02 ` Richard Henderson
2012-10-06 12:30 ` [Qemu-devel] [PATCH 06/14] i386: factor gen_op_set_cc_op/tcg_gen_discard_tl around computing flags Paolo Bonzini
2012-10-09 19:03 ` Richard Henderson
2012-10-06 12:30 ` [Qemu-devel] [PATCH 07/14] i386: add helper functions to get other flags Paolo Bonzini
2012-10-07 19:04 ` Blue Swirl
2012-10-09 19:04 ` Richard Henderson
2012-10-06 12:30 ` [Qemu-devel] [PATCH 08/14] i386: do not compute eflags multiple times consecutively Paolo Bonzini
2012-10-07 19:09 ` Blue Swirl
2012-10-09 19:14 ` Richard Henderson
2012-10-06 12:30 ` [Qemu-devel] [PATCH 09/14] i386: do not call helper to compute ZF/SF Paolo Bonzini
2012-10-07 19:16 ` Blue Swirl
2012-10-09 19:15 ` Richard Henderson
2012-10-09 19:16 ` Richard Henderson
2012-10-10 6:42 ` Paolo Bonzini
2012-10-06 12:30 ` [Qemu-devel] [PATCH 10/14] i386: use inverted setcond when computing NS or NZ Paolo Bonzini
2012-10-07 19:19 ` Blue Swirl
2012-10-09 19:17 ` Richard Henderson [this message]
2012-10-06 12:30 ` [Qemu-devel] [PATCH 11/14] i386: convert gen_compute_eflags_c to TCG Paolo Bonzini
2012-10-07 19:35 ` Blue Swirl
2012-10-09 20:07 ` Richard Henderson
2012-10-10 6:47 ` Paolo Bonzini
2012-10-06 12:30 ` [Qemu-devel] [PATCH 12/14] i386: change gen_setcc_slow_T0 to gen_setcc_slow Paolo Bonzini
2012-10-07 19:36 ` Blue Swirl
2012-10-09 20:07 ` Richard Henderson
2012-10-06 12:30 ` [Qemu-devel] [PATCH 13/14] i386: optimize setbe Paolo Bonzini
2012-10-07 19:43 ` Blue Swirl
2012-10-09 20:13 ` Richard Henderson
2012-10-06 12:30 ` [Qemu-devel] [PATCH 14/14] i386: optimize setcc instructions Paolo Bonzini
2012-10-07 19:58 ` Blue Swirl
2012-10-09 20:22 ` Richard Henderson
2012-10-10 6:51 ` Paolo Bonzini
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