From: Richard Henderson <richard.henderson@linaro.org>
To: Nick Bowler <nbowler@draconx.ca>, qemu-devel@nongnu.org
Cc: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>,
Artyom Tarasenko <atar4qemu@gmail.com>
Subject: Re: [PATCH 1/8] target/sparc: Fix VIS fmul8x16 input register.
Date: Thu, 28 Sep 2023 14:29:13 -0700 [thread overview]
Message-ID: <a6efe37d-4aae-ad6e-87b5-76fc680ec2a7@linaro.org> (raw)
In-Reply-To: <20230925050545.30912-2-nbowler@draconx.ca>
On 9/24/23 01:03, Nick Bowler wrote:
> On a real UltraSparc II CPU, the fmul8x16 instruction reads its first
> input from any of the single-precision floating point registers.
>
> But the emulator is reading the input as if the first operand encodes
> a double-precision register, which in most cases will not contain the
> right data and therefore the output of the emulated instruction is
> just garbage.
>
> Signed-off-by: Nick Bowler<nbowler@draconx.ca>
> Resolves:https://gitlab.com/qemu-project/qemu/-/issues/1901
> ---
> target/sparc/helper.h | 2 +-
> target/sparc/translate.c | 6 +++++-
> target/sparc/vis_helper.c | 9 +++++----
> 3 files changed, 11 insertions(+), 6 deletions(-)
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
r~
next prev parent reply other threads:[~2023-09-28 21:30 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-25 5:03 [PATCH 0/8] SPARC VIS fixes Nick Bowler
2023-09-25 5:03 ` [PATCH 1/8] target/sparc: Fix VIS fmul8x16 input register Nick Bowler
2023-09-28 21:29 ` Richard Henderson [this message]
2023-09-25 5:03 ` [PATCH 2/8] target/sparc: Fix VIS fmul8x16au instruction Nick Bowler
2023-09-28 21:32 ` Richard Henderson
2023-09-29 0:41 ` Nick Bowler
2023-09-29 1:04 ` Richard Henderson
2023-09-25 5:03 ` [PATCH 3/8] target/sparc: Fix VIS fmul8x16al instruction Nick Bowler
2023-09-28 21:32 ` Richard Henderson
2023-09-25 5:03 ` [PATCH 4/8] target/sparc: Fix VIS fmuld8sux16 instruction Nick Bowler
2023-09-28 21:33 ` Richard Henderson
2023-09-25 5:03 ` [PATCH 5/8] target/sparc: Fix VIS fmuld8ulx16 instruction Nick Bowler
2023-09-28 21:34 ` Richard Henderson
2023-09-25 5:03 ` [PATCH 6/8] target/sparc: Fix VIS fpmerge input registers Nick Bowler
2023-09-28 21:35 ` Richard Henderson
2023-09-29 0:32 ` Nick Bowler
2023-09-25 5:03 ` [PATCH 7/8] target/sparc: Fix VIS fexpand input register Nick Bowler
2023-09-28 21:36 ` Richard Henderson
2023-09-25 5:03 ` [PATCH 8/8] target/sparc: Fix VIS subtraction instructions Nick Bowler
2023-09-28 21:40 ` Richard Henderson
2023-09-29 0:31 ` Nick Bowler
2023-09-28 20:05 ` [PATCH 0/8] SPARC VIS fixes Mark Cave-Ayland
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