From: Paul Zimmermann <Paul.Zimmermann@inria.fr>
To: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Cc: libc-alpha@sourceware.org
Subject: Re: BZ #16503
Date: Tue, 10 May 2022 16:59:26 +0200 [thread overview]
Message-ID: <mw1qx15t81.fsf@tomate.loria.fr> (raw)
In-Reply-To: <3e1a7e9e-33cc-0e2f-4d56-227c6e8dcbdb@linaro.org> (message from Adhemerval Zanella via Libc-alpha on Tue, 10 May 2022 11:40:01 -0300)
thank you Adhemerval for checking.
Isn't it using the soft-fp fma from commit 6f7c009 ?
Paul
> Date: Tue, 10 May 2022 11:40:01 -0300
> User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101
> Thunderbird/91.9.0
> From: Adhemerval Zanella via Libc-alpha <libc-alpha@sourceware.org>
>
>
>
> On 10/05/2022 06:29, Paul Zimmermann via Libc-alpha wrote:
> > Hi,
> >
> > has someone access to a SH4 processor? Now that #13304 is fixed,
> > maybe #16503 is fixed too ([sh] wrong results on fma_towardzero).
> >
> > Best regards,
> > Paul
> >
>
> Besides some NaN failures, fma still shows issues:
>
> $ ./testrun.sh math/test-double-fma
>
> Failure: Test: fma_towardzero (-0x2.33956cdae7c2ep-960, 0x3.8e211518bfea2p-108, -0x2.02c2b59766d9p-1024)
> Result:
> is: -1.1185354662458815e-308 -0x0.80b0ad65d9d59p-1022
> should be: -1.1185354662458810e-308 -0x0.80b0ad65d9d58p-1022
> difference: 4.9406564584124654e-324 0x0.0000000000001p-1022
> ulp : 1.0000
> max.ulp : 0.0000
> Failure: Test: fma_towardzero (-0x4p-1076, 0x8.8p-4, -0x3.ffffffffffffcp-1024)
> Result:
> is: -2.2250738585072013e-308 -0x1.0000000000000p-1022
> should be: -2.2250738585072008e-308 -0x0.fffffffffffffp-1022
> difference: 4.9406564584124654e-324 0x0.0000000000001p-1022
> ulp : 1.0000
> max.ulp : 0.0000
> Failure: Test: fma_towardzero (-0x7.ffffffffffffp-1024, 0x8.0000000000008p-4, -0x4p-1076)
> Result:
> is: -2.2250738585072013e-308 -0x1.0000000000000p-1022
> should be: -2.2250738585072008e-308 -0x0.fffffffffffffp-1022
> difference: 4.9406564584124654e-324 0x0.0000000000001p-1022
> ulp : 1.0000
> max.ulp : 0.0000
> Failure: Test: fma_towardzero (0x2.2a7aca1773e0cp-908, 0x9.6809186a42038p-128, -0x2.c9e356b3f0fp-1024)
> Result:
> is: -1.5484573404150452e-308 -0x0.b22757123bbe9p-1022
> should be: -1.5484573404150447e-308 -0x0.b22757123bbe8p-1022
> difference: 4.9406564584124654e-324 0x0.0000000000001p-1022
> ulp : 1.0000
> max.ulp : 0.0000
> Failure: Test: fma_towardzero (0x4p-1076, 0x8.8p-4, 0x3.ffffffffffffcp-1024)
> Result:
> is: 2.2250738585072013e-308 0x1.0000000000000p-1022
> should be: 2.2250738585072008e-308 0x0.fffffffffffffp-1022
> difference: 4.9406564584124654e-324 0x0.0000000000001p-1022
> ulp : 1.0000
> max.ulp : 0.0000
> Failure: Test: fma_towardzero (0x7.ffffffffffffp-1024, 0x8.0000000000008p-4, 0x4p-1076)
> Result:
> is: 2.2250738585072013e-308 0x1.0000000000000p-1022
> should be: 2.2250738585072008e-308 0x0.fffffffffffffp-1022
> difference: 4.9406564584124654e-324 0x0.0000000000001p-1022
> ulp : 1.0000
> max.ulp : 0.0000
>
next prev parent reply other threads:[~2022-05-10 14:59 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-10 9:29 Paul Zimmermann
2022-05-10 14:40 ` Adhemerval Zanella
2022-05-10 14:59 ` Paul Zimmermann [this message]
2022-05-10 16:02 ` Adhemerval Zanella
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