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Re: [Qemu-devel] [PATCH 08/19] target-alpha: use new float64_unordered()
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From: |
Richard Henderson |
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Subject: |
Re: [Qemu-devel] [PATCH 08/19] target-alpha: use new float64_unordered() function |
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Date: |
Thu, 14 Apr 2011 08:14:11 -0700 |
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User-agent: |
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.15) Gecko/20110307 Fedora/3.1.9-0.39.b3pre.fc14 Thunderbird/3.1.9 |
On 04/14/2011 02:14 AM, Peter Maydell wrote:
> While we're on the subject of Alpha and flush-to-zero modes,
> do you know what exception bits should get set when Alpha
> flushes a denormal output (not input) to zero?
...
> I think Alpha should set Inexact and not Underflow, but
> I'm not sure -- can you confirm/deny?
Deny.
Page B-8, Add Sub Output Exceptions,
Exponent underflow and disabled:
Supply +0, no exception delivered to user.
Exponent underflow and enabled:
Supply +-MIN denorm, Underflow delivered to user.
Footnote 3, Overflow and Underflow have priority over Inexact.
r~
- [Qemu-devel] [PATCH 15/19] target-arm: fix wrong usage of floatx80_eq_quiet(), (continued)
- [Qemu-devel] [PATCH 15/19] target-arm: fix wrong usage of floatx80_eq_quiet(), Aurelien Jarno, 2011/04/12
- [Qemu-devel] [PATCH 08/19] target-alpha: use new float64_unordered() function, Aurelien Jarno, 2011/04/12
- Re: [Qemu-devel] [PATCH 08/19] target-alpha: use new float64_unordered() function, Peter Maydell, 2011/04/14
- Re: [Qemu-devel] [PATCH 08/19] target-alpha: use new float64_unordered() function,
Richard Henderson <=
- Re: [Qemu-devel] [PATCH 08/19] target-alpha: use new float64_unordered() function, Peter Maydell, 2011/04/14
- Re: [Qemu-devel] [PATCH 08/19] target-alpha: use new float64_unordered() function, Richard Henderson, 2011/04/14
- Re: [Qemu-devel] [PATCH 08/19] target-alpha: use new float64_unordered() function, Peter Maydell, 2011/04/14
- Re: [Qemu-devel] [PATCH 08/19] target-alpha: use new float64_unordered() function, Richard Henderson, 2011/04/14
[Qemu-devel] [PATCH 11/19] softfloat: rename float*_eq() into float*_eq_quiet(), Aurelien Jarno, 2011/04/12
[Qemu-devel] [PATCH 19/19] target-mips: don't hardcode softfloat exception bits, Aurelien Jarno, 2011/04/12
[Qemu-devel] [PATCH 13/19] softfloat: move float*_eq and float*_eq_quiet, Aurelien Jarno, 2011/04/12
[Qemu-devel] [PATCH 18/19] target-mips: simplify FP comparisons, Aurelien Jarno, 2011/04/12
[Qemu-devel] [PATCH 09/19] target-mips: use new float*_unordered*() functions, Aurelien Jarno, 2011/04/12
[Qemu-devel] [PATCH 16/19] target-alpha: fix wrong usage of float64_eq_quiet(), Aurelien Jarno, 2011/04/12