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Re: [Qemu-devel] [PATCH v2 00/16] target-m68k: implement 680x0 FPU
From: |
Andreas Schwab |
Subject: |
Re: [Qemu-devel] [PATCH v2 00/16] target-m68k: implement 680x0 FPU |
Date: |
Mon, 30 Jan 2017 19:44:12 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/25.1.91 (gnu/linux) |
On Jan 30 2017, Laurent Vivier <address@hidden> wrote:
> The floatx80 datatype used here is not exactly the same as the
> one used by 680x0 for its extended precision data type, because
> normally the signaling bit of 680x0 NAN is the MSB of the mantissa
> minus one and in floatx80 it is the MSB.
An Intel Extended also has a different exponent bias than a Motorola
Extended in the denormal range. In other words, for the latter the bias
doesn't change between normal and denormal numbers.
Andreas.
--
Andreas Schwab, address@hidden
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5
"And now for something completely different."
- [Qemu-devel] [PATCH v2 08/16] target-m68k: define 96bit FP registers for gdb on 680x0, (continued)
- [Qemu-devel] [PATCH v2 08/16] target-m68k: define 96bit FP registers for gdb on 680x0, Laurent Vivier, 2017/01/30
- [Qemu-devel] [PATCH v2 06/16] target-m68k: add FPCR and FPSR, Laurent Vivier, 2017/01/30
- [Qemu-devel] [PATCH v2 10/16] target-m68k: add fscc., Laurent Vivier, 2017/01/30
- [Qemu-devel] [PATCH v2 09/16] target-m68k: add fmovem, Laurent Vivier, 2017/01/30
- [Qemu-devel] [PATCH v2 12/16] target-m68k: add fscale, fgetman, fgetexp and fmod, Laurent Vivier, 2017/01/30
- [Qemu-devel] [PATCH v2 14/16] target-m68k: add explicit single and double precision operations, Laurent Vivier, 2017/01/30
- [Qemu-devel] [PATCH v2 15/16] target-m68k: add more FPU instructions, Laurent Vivier, 2017/01/30
- [Qemu-devel] [PATCH v2 05/16] target-m68k: use floatx80 internally, Laurent Vivier, 2017/01/30
- [Qemu-devel] [PATCH v2 16/16] target-m68k: add fsincos, Laurent Vivier, 2017/01/30
- [Qemu-devel] [PATCH v2 11/16] target-m68k: add fmovecr, Laurent Vivier, 2017/01/30
- Re: [Qemu-devel] [PATCH v2 00/16] target-m68k: implement 680x0 FPU,
Andreas Schwab <=
- Re: [Qemu-devel] [PATCH v2 00/16] target-m68k: implement 680x0 FPU, no-reply, 2017/01/30