src/gallium/drivers/lima/ir/lima_nir_algebraic.py

   1 #
   2 # Copyright (C) 2019 Vasily Khoruzhick <anarsoul@gmail.com>
   3 #
   4 # Permission is hereby granted, free of charge, to any person obtaining a
   5 # copy of this software and associated documentation files (the "Software"),
   6 # to deal in the Software without restriction, including without limitation
   7 # the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8 # and/or sell copies of the Software, and to permit persons to whom the
   9 # Software is furnished to do so, subject to the following conditions:
  10 #
  11 # The above copyright notice and this permission notice (including the next
  12 # paragraph) shall be included in all copies or substantial portions of the
  13 # Software.
  14 #
  15 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18 # THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20 # FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21 # IN THE SOFTWARE.
  22
  23 import argparse
  24 import sys
  25 from math import pi
  26
  27 # Utgard scales fsin/fcos arguments by 2*pi.
  28 # Pass must be run only once, after the main loop
  29
  30 scale_trig = [
  31         (('fsin', 'a'), ('fsin', ('fmul', 'a', 1.0 / (2.0 * pi)))),
  32         (('fcos', 'a'), ('fcos', ('fmul', 'a', 1.0 / (2.0 * pi)))),
  33 ]
  34
  35 # GP has fsign op, so we can use cheaper lowering than one in generic opt_algebraic
  36 lower_ftrunc = [
  37         (('ftrunc', 'a'), ('fmul', ('fsign', 'a'), ('ffloor', ('fmax', 'a', ('fneg', 'a')))))
  38 ]
  39
  40 def main():
  41     parser = argparse.ArgumentParser()
  42     parser.add_argument('-p', '--import-path', required=True)
  43     args = parser.parse_args()
  44     sys.path.insert(0, args.import_path)
  45     run()
  46
  47
  48 def run():
  49     import nir_algebraic  # pylint: disable=import-error
  50
  51     print('#include "ir/lima_ir.h"')
  52
  53     print(nir_algebraic.AlgebraicPass("lima_nir_scale_trig",
  54                                       scale_trig).render())
  55     print(nir_algebraic.AlgebraicPass("lima_nir_lower_ftrunc",
  56                                       lower_ftrunc).render())
  57
  58 if __name__ == '__main__':
  59     main()