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# to you under the Apache License, Version 2.0 (the
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# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
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"""Apple Metal GPU target tags."""

from .registry import register_tag

_METAL_HOST_TRIPLE = "arm64-apple-macos"


def _register_metal_tag(name, max_threads, shared_mem, warp_size, mcpu):
    try:
        from ..codegen import llvm_is_valid_cpu

        if not llvm_is_valid_cpu(mcpu, _METAL_HOST_TRIPLE):
            return
    except Exception:  # pylint: disable=broad-except
        pass  # LLVM not available; register unconditionally
    register_tag(
        name,
        {
            "kind": "metal",
            "max_threads_per_block": max_threads,
            "max_shared_memory_per_block": shared_mem,
            "thread_warp_size": warp_size,
            "host": {
                "kind": "llvm",
                "mtriple": _METAL_HOST_TRIPLE,
                "mcpu": mcpu,
            },
        },
    )


_register_metal_tag("apple/m1-gpu", 1024, 32768, 32, "apple-m1")
_register_metal_tag("apple/m1-gpu-restricted", 256, 32768, 32, "apple-m1")
_register_metal_tag("apple/m2-gpu", 1024, 32768, 32, "apple-m2")
