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Re: [qemu-s390x] [Qemu-devel] [PATCH v1 08/15] s390x/tcg: Handle SET FPC
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From: |
Richard Henderson |
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Subject: |
Re: [qemu-s390x] [Qemu-devel] [PATCH v1 08/15] s390x/tcg: Handle SET FPC AND LOAD FPC 3-bit BFP rounding modes |
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Date: |
Tue, 12 Feb 2019 11:56:39 -0800 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 |
On 2/12/19 11:32 AM, David Hildenbrand wrote:
>> Yes, you want round_to_odd. I suppose that's not valid for float128 right
>> now?
>
> roundAndPackFloat64()
>
> as well as
>
> roundAndPackFloat128()
>
> support it.
>
> It's not implemented for round_canonical(), round_to_int(),
These two are easy. I think Alex and I didn't implement it in the float32/64
rewrite because we didn't have a user. Now we will.
> roundAndPackInt32(), roundAndPackInt64(), roundAndPackUint64(),
> roundAndPackFloat32()
Right, these would be from the float128 side. It shouldn't be too hard...
r~
- Re: [qemu-s390x] [Qemu-devel] [PATCH v1 01/15] s390x/tcg: Fix TEST DATA CLASS instructions, (continued)
[qemu-s390x] [PATCH v1 02/15] s390x/tcg: Fix rounding from float128 to uint64_t/uin32_t, David Hildenbrand, 2019/02/12
[qemu-s390x] [PATCH v1 10/15] s390x/tcg: Refactor saving/restoring the bfp rounding mode, David Hildenbrand, 2019/02/12
[qemu-s390x] [PATCH v1 11/15] s390x/tcg: Prepare for IEEE-inexact-exception control (XxC), David Hildenbrand, 2019/02/12
[qemu-s390x] [PATCH v1 12/15] s390x/tcg: Implement XxC and checks for most FP instructions, David Hildenbrand, 2019/02/12