tests/python/target/test_riscv_features.py

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# ruff: noqa: E501, F401
import pytest

import tvm
from tvm.target import Target, _ffi_api, codegen
from tvm.target.codegen import llvm_get_vector_width, target_has_features

LLVM_VERSION = codegen.llvm_version_major()

# fmt: off
min_llvm_version, tvm_target, vec_width = tvm.testing.parameters(
    # generic, no vector -> (default 128)
    (-1, {"kind": "llvm", "device": "riscv_cpu", "mtriple": "riscv64-linux-gnu", "mcpu": "generic-rv64", "mattr": ["+i", "+m"]}, 128),
    (-1, {"kind": "llvm", "device": "riscv_cpu", "mtriple": "riscv32-linux-gnu", "mcpu": "generic-rv32", "mattr": ["+64bit", "+a", "+c", "+d", "+f", "+m"]}, 128),
    # generic, with vector -> (default zvl128b)
    (-1, {"kind": "llvm", "device": "riscv_cpu", "mtriple": "riscv32-linux-gnu", "mcpu": "generic-rv32", "mattr": ["+i", "+m", "+v"]}, 128),
    (-1, {"kind": "llvm", "device": "riscv_cpu", "mtriple": "riscv64-linux-gnu", "mcpu": "generic-rv64", "mattr": ["+64bit", "+a", "+c", "+d", "+f", "+m", "+v"]}, 128),
    # explicit +zvlXXXb
    (14, {"kind": "llvm", "device": "riscv_cpu", "mtriple": "riscv32-linux-gnu", "mcpu": "generic-rv32", "mattr": ["+i", "+m", "+v", "+zvl64b"]}, 128),
    (14, {"kind": "llvm", "device": "riscv_cpu", "mtriple": "riscv64-linux-gnu", "mcpu": "generic-rv64", "mattr": ["+64bit", "+a", "+c", "+d", "+f", "+m", "+v", "+zvl256b"]}, 256),
    (14, {"kind": "llvm", "device": "riscv_cpu", "mtriple": "riscv64-linux-gnu", "mcpu": "generic-rv64", "mattr": ["+64bit", "+a", "+c", "+d", "+f", "+m", "+v", "+zvl512b"]}, 512),
    # vendor CPU
    (17, {"kind": "llvm", "device": "riscv_cpu", "mtriple": "riscv64-linux-gnu", "mcpu": "sifive-x280"}, 512),
    (18, {"kind": "llvm", "device": "riscv_cpu", "mtriple": "riscv64-linux-gnu", "mcpu": "sifive-p670"}, 128),
    (19, {"kind": "llvm", "device": "riscv_cpu", "mtriple": "riscv64-linux-gnu", "mcpu": "spacemit-x60"}, 256),
)


def test_riscv_rvv_features(min_llvm_version, tvm_target, vec_width):
    """Test RVV features support for different targets.

    Parameters
    ----------
    min_llvm_version : int
        Minimal LLVM version.
    tvm_target : str
        TVM target.
    vec_width : bool
        Expected vector width.
    """

    # skip test on llvm_version
    if LLVM_VERSION < min_llvm_version:
        return

    with Target(tvm_target):
        assert llvm_get_vector_width() == vec_width