[Libclc-dev] [PATCH 1/3] Introduce per device defines

[Jan Vesely]

On Mon, 2015-04-13 at 08:23 -0700, Tom Stellard wrote:
> On Sun, Apr 12, 2015 at 06:46:52PM -0400, Jan Vesely wrote:
> > Make cl_khr_fp64 define per-device.
> > This patch does not change the generated Makefile
> > 
> > Signed-off-by: Jan Vesely <jan.vesely at rutgers.edu>
> > ---
> > I've tried to find a way to make libclc more device specific.
> > This series handles fp64, but I plan to extend it to other defines like
> > __CLC_HAVE_FMA, or (with Tom's recent patches) __CLC_HAVE_LDEXP.
> > 
> > Alternatives I could think of was to try to get the information from clang,
> > but I don't think it should provide that kind of low level information.
> > Or add r600 support to librt.
> > 
> 
> Clang is already defining cl_khr_fp64 for SI+ devices.  I think these other
> define belong in clang too.  Clang's X86 front-end defines a __FMA__ macro,
> plus macros for other instructions, so I think we should follow the same
> convention for r600/si.

I found the clang target definitions. It does not really solve the
problem of having the information in two different places, but I guess
clang is a better place than libclc. I've prepared a patch to get it
working on all asics.
Do we want this solution for NVPTX/until 3.7 is released?
so the process would be to add a desired define to libclc/configure, and
clang, and remove it from configure when the respective clang version
gets released?

jan

> 
> > Jan
> > 
> >  configure.py | 32 +++++++++++++++++++++-----------
> >  1 file changed, 21 insertions(+), 11 deletions(-)
> > 
> > diff --git a/configure.py b/configure.py
> > index 7d4b537..575989a 100755
> > --- a/configure.py
> > +++ b/configure.py
> > @@ -88,16 +88,25 @@ if not cxx_compiler:
> >  
> >  available_targets = {
> >    'r600--' : { 'devices' :
> > -               [{'gpu' : 'cedar',   'aliases' : ['palm', 'sumo', 'sumo2', 'redwood', 'juniper']},
> > -                {'gpu' : 'cypress', 'aliases' : ['hemlock']},
> > -                {'gpu' : 'barts',   'aliases' : ['turks', 'caicos']},
> > -                {'gpu' : 'cayman',  'aliases' : ['aruba']}]},
> > +               [{'gpu' : 'cedar',   'aliases' : ['palm', 'sumo', 'sumo2', 'redwood', 'juniper'],
> > +                 'defines' : ['cl_khr_fp64']},
> > +                {'gpu' : 'cypress', 'aliases' : ['hemlock'],
> > +                 'defines' : ['cl_khr_fp64']},
> > +                {'gpu' : 'barts',   'aliases' : ['turks', 'caicos'],
> > +                 'defines' : ['cl_khr_fp64']},
> > +                {'gpu' : 'cayman',  'aliases' : ['aruba'],
> > +                 'defines' : ['cl_khr_fp64']}]},
> >    'amdgcn--': { 'devices' :
> > -                [{'gpu' : 'tahiti',  'aliases' : ['pitcairn', 'verde', 'oland', 'hainan', 'bonaire', 'kabini', 'kaveri', 'hawaii','mullins']}]},
> > -  'nvptx--'   : { 'devices' : [{'gpu' : '', 'aliases' : []}]},
> > -  'nvptx64--'   : { 'devices' : [{'gpu' : '', 'aliases' : []}] },
> > -  'nvptx--nvidiacl'   : { 'devices' : [{'gpu' : '', 'aliases' : []}] },
> > -  'nvptx64--nvidiacl' : { 'devices' : [{'gpu' : '', 'aliases' : []}] }
> > +                [{'gpu' : 'tahiti', 'aliases' : ['pitcairn', 'verde', 'oland', 'hainan', 'bonaire', 'kabini', 'kaveri', 'hawaii','mullins'],
> > +                  'defines' : ['cl_khr_fp64']}]},
> > +  'nvptx--'   : { 'devices' : [{'gpu' : '', 'aliases' : [],
> > +                                'defines' : ['cl_khr_fp64']}]},
> > +  'nvptx64--' : { 'devices' : [{'gpu' : '', 'aliases' : [],
> > +                                'defines' : ['cl_khr_fp64']}]},
> > +  'nvptx--nvidiacl'   : { 'devices' : [{'gpu' : '', 'aliases' : [],
> > +                                        'defines' : ['cl_khr_fp64']}]},
> > +  'nvptx64--nvidiacl' : { 'devices' : [{'gpu' : '', 'aliases' : [],
> > +                                        'defines' : ['cl_khr_fp64']}]}
> >  }
> >  
> >  default_targets = ['nvptx--nvidiacl', 'nvptx64--nvidiacl', 'r600--', 'amdgcn--']
> > @@ -175,13 +184,14 @@ for target in targets:
> >  
> >    for device in available_targets[target]['devices']:
> >      # The rule for building a .bc file for the specified architecture using clang.
> > +    device_defines = ' '.join(["-D%s" % define for define in device['defines']])
> >      clang_bc_flags = "-target %s -I`dirname $in` %s " \
> >                       "-fno-builtin " \
> >                       "-Dcl_clang_storage_class_specifiers " \
> > -                     "-Dcl_khr_fp64 " \
> > +                     "%s " \
> >                       "-Dcles_khr_int64 " \
> >                       "-D__CLC_INTERNAL " \
> > -                     "-emit-llvm" % (target, clang_cl_includes)
> > +                     "-emit-llvm" % (target, clang_cl_includes, device_defines)
> >      if device['gpu'] != '':
> >        clang_bc_flags += ' -mcpu=' + device['gpu']
> >      clang_bc_rule = "CLANG_CL_BC_" + target + "_" + device['gpu']
> > -- 
> > 2.1.0
> > 
> > 
> > _______________________________________________
> > Libclc-dev mailing list
> > Libclc-dev at pcc.me.uk
> > http://www.pcc.me.uk/cgi-bin/mailman/listinfo/libclc-dev

-- 
Jan Vesely <jan.vesely at rutgers.edu>
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