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"""Test code for softmax
Copied from topi/tests/python/test_topi_softmax.py.
Should be removed once we fix OpenGL testing on Jenkins.
"""

import os
import numpy as np
import tvm
from tvm import te
import topi
import logging
from topi.util import get_const_tuple

def verify_softmax(m, n):
    A = te.placeholder((m, n), name='A')
    B = topi.nn.softmax(A)
    # confirm lower works
    s = te.create_schedule([B.op])
    tvm.lower(s, [A, B], simple_mode=True)

    a_np = np.random.uniform(size=get_const_tuple(A.shape)).astype(A.dtype)
    b_np = topi.testing.softmax_python(a_np)

    def check_device(device):
        if not tvm.runtime.enabled(device):
            print("Skip because %s is not enabled" % device)
            return
        print("Running on target: %s" % device)
        with tvm.target.create(device):
            s = topi.generic.schedule_softmax(B)
        ctx = tvm.context(device, 0)
        a = tvm.nd.array(a_np, ctx)
        b = tvm.nd.array(np.zeros(get_const_tuple(B.shape), dtype=B.dtype), ctx)
        foo = tvm.build(s, [A, B], device, name="softmax")
        foo(a, b)
        tvm.testing.assert_allclose(b.asnumpy(), b_np, rtol=1e-5)

    for device in ["opengl"]:
        check_device(device)

def test_softmax():
    verify_softmax(32, 10)
    verify_softmax(3, 4)


def verify_log_softmax(m, n):
    A = te.placeholder((m, n), name='A')
    B = topi.nn.log_softmax(A)
    # confirm lower works
    s = te.create_schedule([B.op])
    tvm.lower(s, [A, B], simple_mode=True)
    a_np = np.random.uniform(size=get_const_tuple(A.shape)).astype(A.dtype)
    b_np = topi.testing.log_softmax_python(a_np)

    def check_device(device):
        if not tvm.runtime.enabled(device):
            print("Skip because %s is not enabled" % device)
            return
        print("Running on target: %s" % device)
        with tvm.target.create(device):
            s = topi.generic.schedule_softmax(B)
        ctx = tvm.context(device, 0)
        a = tvm.nd.array(a_np, ctx)
        b = tvm.nd.array(np.zeros(get_const_tuple(B.shape), dtype=B.dtype), ctx)
        foo = tvm.build(s, [A, B], device, name="log_softmax")
        foo(a, b)
        tvm.testing.assert_allclose(b.asnumpy(), b_np, rtol=1e-5)

    for device in ["opengl"]:
        check_device(device)


def test_log_softmax():
    verify_log_softmax(32, 10)
    verify_log_softmax(3, 4)

if __name__ == "__main__":
    logging.basicConfig(level=logging.DEBUG)
    test_softmax()
    test_log_softmax()
