Hello Jeff,

I have added the default Red Hat license to the source files based on 
those with no explicit license notice. I have also added it to those 
files with the 'Software Manual for the Elementary Functions' 
attribution, since attribution is not a license as such.

Thanks

Kwok

On 17/01/2023 7:52 pm, Jeff Johnston wrote:
> Hello Kwok,
> 
> Thanks for re-submitting.  For the files you base off that have no 
> license info, their license defaults to be the Red Hat license at the 
> top of COPYING.NEWLIB.  You will need to add that license to those new 
> files you based off.
> 
> -- Jeff J.
> 
> On Tue, Jan 17, 2023 at 7:36 AM Kwok Cheung Yeung <kcy@codesourcery.com 
> <mailto:kcy@codesourcery.com>> wrote:
> 
>     Hello
> 
>     Sorry for the delay in replying. I've gone through the licenses for
>     each
>     file - apart from v64df_gamma.c ,v64sf_gamma.c, v64df_log10.c and
>     v64sf_log10.c (which are all rather trivial), all the .c files already
>     contain the copyright header from the file from which they were
>     derived.
>     A number of the original files simply had no license notice, so there
>     was nothing to copy over.
> 
>     No license:
> 
>     v64_mathcnst.c, v64df_acos.c, v64df_asin.c, v64df_atan.c,
>     v64df_atan2.c,
>     v64df_cos.c, v64df_cosh.c, v64df_ispos.c, v64df_numtest.c, v64df_sin.c,
>     v64df_sinh.c, v64sf_acos.c, v64sf_asin.c, v64sf_atan.c, v64sf_atan2.c,
>     v64sf_cos.c, v64sf_cosh.c, v64sf_ispos.c, v64sf_numtest.c, v64sf_sin.c,
>     v64sf_sinh.c
> 
>     Sun Microsystems license:
> 
>     v64df_acosh.c, v64df_asinh.c, v64df_atanh.c, v64df_copysign.c,
>     v64df_erf.c, v64df_finite.c, v64df_fmod.c, v64df_gamma.c,
>     v64df_hypot.c,
>     v64df_ilogb.c, v64df_isnan.c, v64df_lgamma_r.c, v64df_lgamma.c,
>     v64df_modf.c, v64df_pow.c, v64df_remainder.c, v64df_rint.c,
>     v64df_scalb.c, v64df_scalbn.c, v64df_signif.c, v64df_tan.c,
>     v64df_tgamma.c, v64sf_acosh.c, v64sf_asinh.c, v64sf_atanh.c,
>     v64sf_copysign.c, v64sf_erf.c, v64sf_exp.c, v64sf_finite.c,
>     v64sf_fmod.c, v64sf_gamma.c, v64sf_hypot.c, v64sf_ilogb.c,
>     v64sf_isnan.c, v64sf_lgamma_r.c, v64sf_lgamma.c, v64sf_modf.c,
>     v64sf_pow.c, v64sf_remainder.c, v64sf_rint.c, v64sf_scalb.c,
>     v64sf_scalbn.c, v64sf_signif.c, v64sf_tan.c, v64sf_tgamma.c
> 
>     Red Hat license:
> 
>     v64df_exp2.c, v64sf_exp2.c
> 
>     'Software Manual for the Elementary Functions' attribution:
> 
>     v64df_asine.c, v64df_atangent.c, v64df_exp.c, v64df_log.c,
>     v64df_log10.c, v64df_sine.c, v64df_sineh.c, v64df_sqrt.c, v64df_tanh.c,
>     v64sf_asine.c, v64sf_atangent.c, v64sf_log.c, v64sf_log10.c,
>     v64sf_sine.c, v64sf_sineh.c, v64sf_sqrt.c, v64sf_tanh.c
> 
>     Original:
> 
>     v64df_log2.c, v64sf_log2.c, v64_reent.c
> 
>     The amdgcnmach.h file has portions from:
> 
>     newlib/libm/common/fdlibm.h (Sun Microsystems license)
>     newlib/libm/mathfp/zmath.h (no license)
>     newlib/libm/common/math_errf.c (ARM license)
>     newlib/libm/common/math_config.h (ARM license)
> 
>     so I have added the Sun and ARM copyright notices to the file. I have
>     split off the vector macro library used by all the functions into a
>     separate file amdgcn_veclib.h to make the authorship more clear, and
>     have amdgcnmach.h include that.
> 
>     I have added a copyright notice for Siemens (my parent company) at the
>     top of each file, with terms similar to the usual MIT/BSD clauses.
> 
>     Okay for inclusion in Newlib?
> 
>     Thanks,
> 
>     Kwok
> 
> 
>      > Hi Kwok,
>      >
>      > You need to provide headers in all the source and include files. 
>     Some
>      > files mention they are based on an existing
>      > newlib file.  Those files should copy the license header over and
>     not just
>      > have a reference (imagine if
>      > someone were to delete the original file or rename it).  You are not
>      > allowed to change the licensing
>      > of a file you have based off of but you can add additional
>     copyright info
>      > for your additions if you wish.
>      >
>      > As mentioned you need to add a license header for the new
>     amdgcnmatch.h
>      > header file that is used everywhere.
>      >
>      > -- Jeff J.
>      >
>      > On Fri, Dec 2, 2022 at 5:04 PM Kwok Cheung Yeung
>     <kcy@codesourcery.com <mailto:kcy@codesourcery.com>>
>      > wrote:
>      >
>      >> Hello
>      >>
>      >> This patch implements a set of vectorized math routines for use
>     by the
>      >> auto-vectorizer in GCC for the AMD GCN architecture. The
>     implementation
>      >> is located in libm/machine/amdgcn, and is based on the current
>     set of
>      >> scalar math routines in Newlib, from libm/common, libm/math and
>      >> libm/mathfp (where the level of accuracy was deemed sufficient
>     for our
>      >> purposes). I have ensured that the copyright notices from the
>     original
>      >> were retained.
>      >>
>      >> The vectorized routines make extensive use of the GCC vector
>     extensions
>      >> for C, some GCN-specific builtins in GCC, and a SIMD abstraction
>     library
>      >> located in libm/machine/amdgcn/amdgcnmach.h. As the builtins are a
>      >> recent addition to GCC, I have added #if statements to skip
>     compilation
>      >> of the routines that use them to ensure that Newlib will still
>     build for
>      >> older versions of GCC.
>      >>
>      >> Versions for 2-lane vectors up to 64-lane vectors (in powers of
>     2) are
>      >> provided for all public functions. Versions with <64 lanes
>     (which is the
>      >> 'natural' vector width for AMD GCN) are shims that call the 64-lane
>      >> version with the unused lanes masked out.
>      >>
>      >> Okay for inclusion into Newlib?
>      >>
>      >> Thanks
>      >>
>      >> Kwok Yeung
>