Re: [PATCH v4 2/5] nds32: Support FP emulation

2018-11-26 Thread Vincent Chen
On Mon, Nov 26, 2018 at 06:18:01PM +0800, David Laight wrote: > From: Vincent Chen > > Sent: 26 November 2018 01:23 > > On Fri, Nov 23, 2018 at 06:53:37PM +0800, David Laight wrote: > > > From: Vincent Chen > > > > Sent: 22 November 2018 03:15 > > > > > > > > The Andes FPU coprocessor does not supp

RE: [PATCH v4 2/5] nds32: Support FP emulation

2018-11-26 Thread David Laight
From: Vincent Chen > Sent: 26 November 2018 01:23 > On Fri, Nov 23, 2018 at 06:53:37PM +0800, David Laight wrote: > > From: Vincent Chen > > > Sent: 22 November 2018 03:15 > > > > > > The Andes FPU coprocessor does not support denormalized number handling. > > > According to the specification, FPU

Re: [PATCH v4 2/5] nds32: Support FP emulation

2018-11-25 Thread Vincent Chen
On Fri, Nov 23, 2018 at 06:53:37PM +0800, David Laight wrote: > From: Vincent Chen > > Sent: 22 November 2018 03:15 > > > > The Andes FPU coprocessor does not support denormalized number handling. > > According to the specification, FPU generates a denorm input exception > > that requires the kern

RE: [PATCH v4 2/5] nds32: Support FP emulation

2018-11-23 Thread David Laight
From: Vincent Chen > Sent: 22 November 2018 03:15 > > The Andes FPU coprocessor does not support denormalized number handling. > According to the specification, FPU generates a denorm input exception > that requires the kernel to deal with this instrution operation when it > encounters denormalize

[PATCH v4 2/5] nds32: Support FP emulation

2018-11-21 Thread Vincent Chen
The Andes FPU coprocessor does not support denormalized number handling. According to the specification, FPU generates a denorm input exception that requires the kernel to deal with this instrution operation when it encounters denormalized operands. Hence an nds32 FPU ISA emulator in the kernel is