Re: ARMV7a: selected processor does not support requested special purpose register

[Richard Earnshaw]

On 03/10/2022 16:48, Richard Earnshaw via Binutils wrote:
> On 03/10/2022 15:41, Umesh Kalappa via Binutils wrote:
> > Hi All,
> >
> > We have problem to compile the following asm
> > https://godbolt.org/z/hejMPoW69
> >
> > and asm error out with the subject message .
> >
> > Is mrs for float special register not valid on cortex-a9 ?
> >
> > Thank you
> > ~Umesh
>
> that's because the instruction you want is
>
> vmrs r4, fpscr
>
> R.

Also note that the fmrrs mnemonic is not part of the UAL (unified 
assembly language) specification - it was deprecated a long time ago. 
The correct names these days all start with a V - the disassembler 
output shows the modern form.

The legacy name for vmrs was fmrx.

R.