tests/python/target/test_arm_target.py

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import subprocess
import tempfile
import re

import pytest
import numpy as np

import tvm
from tvm.script import tir as T
from tvm.target import codegen

llvm_version, arm_target, input_dtype, kernel_dtype, is_supported = tvm.testing.parameters(
    # Testing mcpu type
    (8, "c -mcpu=cortex-m4", "int8", "int8", False),
    (8, "c -mcpu=cortex-m7", "int8", "int8", False),
    (8, "c -mcpu=cortex-m33", "int8", "int8", False),
    (8, "c -mcpu=cortex-m55", "int8", "int8", False),
    (8, "c -mcpu=cortex-m3", "int8", "int8", False),
    (7, "llvm -mtriple=arm-linux-gnueabi -mattr=+neon", "int8", "int8", False),
    (8, "llvm -mtriple=arm-linux-gnueabi -mattr=+neon", "int8", "int8", True),
    (9, "llvm -mtriple=arm-linux-gnueabi -mattr=+neon", "int8", "int8", True),
    (8, "llvm -mtriple=arm-linux-gnueabi", "int8", "int8", False),
    (7, "llvm -mtriple=aarch64-linux-gnu -mattr=+v8.4a,+dotprod", "int8", "int8", False),
    (8, "llvm -mtriple=aarch64-linux-gnu -mattr=+v8.4a,+dotprod", "int8", "int8", True),
    (9, "llvm -mtriple=arm-linux-gnueabi -mattr=+neon", "int8", "int8", True),
    (8, "llvm -mtriple=aarch64-linux-gnu", "int8", "int8", True),
    # Testing dtype
    (8, "llvm -mtriple=aarch64-linux-gnu -mattr=+neon", "int16", "int8", False),
    (8, "llvm -mtriple=aarch64-linux-gnu -mattr=+neon", "int8", "int16", False),
    (8, "llvm -mtriple=aarch64-linux-gnu -mattr=+neon", "int16", "int16", False),
)


@pytest.fixture(scope="session")
def sve_device_vector_length():
    c_code = r"""
    #include <stdio.h>
    #include <arm_sve.h>

    int main() {
        printf("%ld\n", svcntb() * 8);
    }
    """

    with tempfile.TemporaryDirectory() as tmp_dir:
        c_path = f"{tmp_dir}/vl.c"
        o_path = f"{tmp_dir}/out.o"
        with open(c_path, "w") as f:
            f.write(c_code)
        tvm.contrib.cc.create_executable(o_path, c_path, ["-march=native"])
        out = subprocess.check_output(o_path, shell=True).strip().decode()

    return int(out)


@tvm.testing.requires_aarch64_sve
def test_scalable_div(sve_device_vector_length):
    np.random.seed(0)
    target = "llvm -mtriple=aarch64-linux-gnu -mattr=+sve"
    dev = tvm.cpu(0)

    @T.prim_func
    def my_func(a: T.handle):
        A = T.match_buffer(a, (1,), "int32")
        T.func_attr({"global_symbol": "my_module", "tir.noalias": True})
        A[0] = T.Div(10000, 4 * T.vscale())

    mod = tvm.compile(my_func, target=target)

    A_nd = tvm.runtime.tensor(np.empty((1,), dtype="int32"), device=dev)
    mod(A_nd)

    ref = 10000 // (sve_device_vector_length // 32)
    tvm.testing.assert_allclose(A_nd.numpy()[0], ref)


@tvm.testing.requires_aarch64_sve
def test_scalable_buffer_load_store(sve_device_vector_length):
    np.random.seed(0)
    target = "llvm -mtriple=aarch64-linux-gnu -mattr=+sve"
    num_elements = sve_device_vector_length // 32
    dev = tvm.cpu(0)

    @T.prim_func
    def my_func(a: T.handle, b: T.handle):
        A = T.match_buffer(a, (num_elements,), "float32")
        B = T.match_buffer(b, (num_elements,), "float32")
        T.func_attr({"global_symbol": "my_module", "tir.noalias": True})
        B[T.ramp(0, 1, 4 * T.vscale())] = A[T.ramp(0, 1, 4 * T.vscale())]

    mod = tvm.compile(my_func, target=target)

    A_np = np.random.uniform(size=(num_elements,)).astype("float32")
    B_np = np.zeros((num_elements,)).astype("float32")
    A_nd = tvm.runtime.tensor(A_np, device=dev)
    B_nd = tvm.runtime.tensor(B_np, device=dev)
    mod(A_nd, B_nd)

    tvm.testing.assert_allclose(B_nd.numpy(), A_np)


@tvm.testing.requires_aarch64_sve
def test_scalable_loop_bound(sve_device_vector_length):
    np.random.seed(0)

    dtype = "float32"
    num_elements = sve_device_vector_length // 32
    target = "llvm -mtriple=aarch64-linux-gnu -mattr=+sve"
    dev = tvm.cpu(0)

    @T.prim_func
    def my_func(a: T.handle, b: T.handle):
        A = T.match_buffer(a, (num_elements,), "float32")
        B = T.match_buffer(b, (num_elements,), "float32")
        T.func_attr({"global_symbol": "my_module", "tir.noalias": True})
        for i in T.serial(0, 4 * T.vscale()):
            B[i] = A[i]

    mod = tvm.compile(my_func, target=target)

    A_np = np.random.uniform(size=(num_elements,)).astype(dtype)
    B_np = np.zeros((num_elements,)).astype(dtype)
    A_nd = tvm.runtime.tensor(A_np, device=dev)
    B_nd = tvm.runtime.tensor(B_np, device=dev)
    mod(A_nd, B_nd)

    tvm.testing.assert_allclose(B_nd.numpy(), A_np)


@tvm.testing.requires_aarch64_sve
def test_scalable_broadcast(sve_device_vector_length):
    target = "llvm -mtriple=aarch64-linux-gnu -mattr=+sve"
    num_elements = sve_device_vector_length // 32
    dev = tvm.cpu(0)

    @T.prim_func
    def my_func(a: T.handle):
        A = T.match_buffer(a, (num_elements,), "float32")
        T.func_attr({"global_symbol": "my_module", "tir.noalias": True})
        A[T.ramp(0, 1, 4 * T.vscale())] = T.broadcast(1, 4 * T.vscale())

    mod = tvm.compile(my_func, target=target)

    A_np = np.zeros((num_elements,)).astype("float32")
    A_nd = tvm.runtime.tensor(A_np, device=dev)
    mod(A_nd)

    ref = np.ones((num_elements,))
    tvm.testing.assert_allclose(A_nd.numpy(), ref)