src/nouveau/compiler/nak_nir_algebraic.py

# Copyright (C) 2023 Red Hat, Inc.
# Copyright (C) 2021 Collabora, Ltd.
# Copyright (C) 2016 Intel Corporation
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import argparse
import sys

a = 'a'
b = 'b'
c = 'c'

# common conditions to improve readability
volta = 'nak->sm >= 70 && nak->sm < 75'

algebraic_lowering = [
    # Volta doesn't have `IMNMX`
    (('imin', 'a', 'b'), ('bcsel', ('ilt', a, b), a, b), volta),
    (('imax', 'a', 'b'), ('bcsel', ('ilt', a, b), b, a), volta),
    (('umin', 'a', 'b'), ('bcsel', ('ult', a, b), a, b), volta),
    (('umax', 'a', 'b'), ('bcsel', ('ult', a, b), b, a), volta),
    (('iadd', 'a@64', ('ineg', 'b@64')), ('isub', a, b)),
]

def main():
    parser = argparse.ArgumentParser()
    parser.add_argument('--out', required=True, help='Output file.')
    parser.add_argument('-p', '--import-path', required=True)
    args = parser.parse_args()
    sys.path.insert(0, args.import_path)

    import nir_algebraic  # pylint: disable=import-error

    try:
        with open(args.out, 'w', encoding='utf-8') as f:
            f.write('#include "nak_private.h"')
            f.write(nir_algebraic.AlgebraicPass(
                "nak_nir_lower_algebraic_late",
                algebraic_lowering,
                [
                    ("const struct nak_compiler *", "nak"),
                ]).render())
    except Exception:
        sys.exit(1)

if __name__ == '__main__':
    main()