tests/python/target/test_riscv_features.py

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import pytest

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

LLVM_VERSION = codegen.llvm_version_major()

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


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