[igt-dev] [PATCH i-g-t v2 1/2] shaders: Add assembler instructions and update README for shaders

[Katarzyna Dec]

On Fri, Jun 15, 2018 at 10:19:02AM +0100, Chris Wilson wrote:
> Quoting Katarzyna Dec (2018-06-15 10:12:59)
> > We're not planning to work on assembler in igt anymore, since we can
> > reuse an existing project (IGA) that will do this work for us. The
> > only extra thing we need to do is convert the result binary to C-array,
> > simple python script.
> > 
> > Signed-off-by: Katarzyna Dec <katarzyna.dec at intel.com>
> > Cc: Arkadiusz Hiler <arkadiusz.hiler at intel.com>
> > Cc: Petri Latvala <petri.latvala at intel.com>
> > Cc: Kalamarz Lukasz <lukasz.kalamarz at intel.com>
> > Cc: Antonio Argenziano <antonio.argenziano at intel.com>
> > ---
> >  shaders/README                    | 37 +++++++++++++++++++++++++++++++++++++
> >  shaders/gpgpu/README              | 11 +++++++++++
> >  shaders/gpgpu/gpgpu_fill_gen8.asm | 10 ++++++++++
> >  shaders/gpgpu/gpgpu_fill_gen9.asm | 10 ++++++++++
> >  shaders/media/README              |  9 +++++++++
> >  shaders/media/media_fill_gen8.asm | 11 +++++++++++
> >  shaders/ps/README                 |  8 ++++++++
> >  shaders/ps/blit_gen8.asm          |  7 +++++++
> >  shaders/ps/neg1_gen8.asm          |  9 +++++++++
> >  9 files changed, 112 insertions(+)
> >  create mode 100644 shaders/README
> >  create mode 100644 shaders/gpgpu/gpgpu_fill_gen8.asm
> >  create mode 100644 shaders/gpgpu/gpgpu_fill_gen9.asm
> >  create mode 100644 shaders/media/media_fill_gen8.asm
> >  create mode 100644 shaders/ps/blit_gen8.asm
> >  create mode 100644 shaders/ps/neg1_gen8.asm
> > 
> > diff --git a/shaders/README b/shaders/README
> > new file mode 100644
> > index 00000000..9e6bf410
> > --- /dev/null
> > +++ b/shaders/README
> > @@ -0,0 +1,37 @@
> > +This directory is for shaders used in media_fill, gpgpu_fill, rendercopy
> > +and media_spin libraries.
> > +
> > +Till Gen8 shaders were generated using intel-gen4asm script (implementation in
> > +assembler/ directory). From Gen8 it is possible to use Intel Graphics Assembler
> > +to generate binary from asm instructions
> > +https://github.com/intel/intel-graphics-compiler/tree/master/visa/iga
> > +Clone and build this project to use IGA.
> > +
> > +where to find IGA binary TODO: add path
> > +
> > +For maintaining compatibility with our tests there is a bin to hex converter
> > +written in python.
> > +Instructions how to build media, gpgpu or ps shaders included in their
> > +subdirectories.
> > +
> > +Converter:
> > +#!/usr/bin/env python2
> > +import struct
> > +import sys
> > +
> > +print "static const uint32_t kernel[][4] = {"
> > +
> > +with open(sys.argv[1], 'r') as f:
> > +    fmt = '<LLLL'
> > +    step = struct.calcsize(fmt)
> > +    while True:
> > +        buf = f.read(step)
> > +        if not buf:
> > +            break
> > +        elif len(buf) < step:
> > +            buf += '\x00' * (step - len(buf))
> > +
> > +        val = struct.unpack('<LLLL', buf)
> > +        print "    {{ 0x{:08x}, 0x{:08x}, 0x{:08x}, 0x{:08x} }},".format(*val)
> > +
> > +print "};"
> > \ No newline at end of file
> 
> How difficult is to make it into a pipe? converter.py < asm.obj > asm.c
> (As well as converter.py -i asm.obj -o asm.c)
> 
> Rather than putting this in a README, save the cut'n'paste and include
> it as a .py.
> -Chris

I will add this converter as single file.
Kasia