Adding overloads and tests for fetch_* atomic functions

numba_dpex/experimental/_kernel_dpcpp_spirv_overloads/_atomic_ref_overloads.py

@@ -69,6 +69,10 @@ def gen(context, builder, sig, args):
             "--spirv-ext=+SPV_EXT_shader_atomic_float_add"
         ]
 
+        context.extra_compile_options[LLVM_SPIRV_ARGS] = [
+            "--spirv-ext=+SPV_EXT_shader_atomic_float_min_max"
+        ]
+
         ptr_type = retty.as_pointer()
         ptr_type.addrspace = atomic_ref_ty.address_space
 
@@ -118,6 +122,59 @@ def _intrinsic_fetch_add(ty_context, ty_atomic_ref, ty_val):
     return _intrinsic_helper(ty_context, ty_atomic_ref, ty_val, "fetch_add")
 
 
+def _atomic_sub_float_wrapper(gen_fn):
+    def gen(context, builder, sig, args):
+        # args is a tuple, which is immutable
+        # covert tuple to list obj first before replacing arg[1]
+        # with fneg and convert back to tuple again.
+        args_lst = list(args)
+        args_lst[1] = builder.fneg(args[1])
+        args = tuple(args_lst)
+
+        gen_fn(context, builder, sig, args)
+
+    return gen
+
+
+@intrinsic(target=DPEX_KERNEL_EXP_TARGET_NAME)
+def _intrinsic_fetch_sub(ty_context, ty_atomic_ref, ty_val):
+    if ty_atomic_ref.dtype in (types.float32, types.float64):
+        # dpcpp does not support ``__spirv_AtomicFSubEXT``. fetch_sub
+        # for floats is implemented by negating the value and calling fetch_add.
+        # For example, A.fetch_sub(A, val) is implemented as A.fetch_add(-val).
+        sig, gen = _intrinsic_helper(
+            ty_context, ty_atomic_ref, ty_val, "fetch_add"
+        )
+        return sig, _atomic_sub_float_wrapper(gen)
+
+    return _intrinsic_helper(ty_context, ty_atomic_ref, ty_val, "fetch_sub")
+
+
+@intrinsic(target=DPEX_KERNEL_EXP_TARGET_NAME)
+def _intrinsic_fetch_min(ty_context, ty_atomic_ref, ty_val):
+    return _intrinsic_helper(ty_context, ty_atomic_ref, ty_val, "fetch_min")
+
+
+@intrinsic(target=DPEX_KERNEL_EXP_TARGET_NAME)
+def _intrinsic_fetch_max(ty_context, ty_atomic_ref, ty_val):
+    return _intrinsic_helper(ty_context, ty_atomic_ref, ty_val, "fetch_max")
+
+
+@intrinsic(target=DPEX_KERNEL_EXP_TARGET_NAME)
+def _intrinsic_fetch_and(ty_context, ty_atomic_ref, ty_val):
+    return _intrinsic_helper(ty_context, ty_atomic_ref, ty_val, "fetch_and")
+
+
+@intrinsic(target=DPEX_KERNEL_EXP_TARGET_NAME)
+def _intrinsic_fetch_or(ty_context, ty_atomic_ref, ty_val):
+    return _intrinsic_helper(ty_context, ty_atomic_ref, ty_val, "fetch_or")
+
+
+@intrinsic(target=DPEX_KERNEL_EXP_TARGET_NAME)
+def _intrinsic_fetch_xor(ty_context, ty_atomic_ref, ty_val):
+    return _intrinsic_helper(ty_context, ty_atomic_ref, ty_val, "fetch_xor")
+
+
 @intrinsic(target=DPEX_KERNEL_EXP_TARGET_NAME)
 def _intrinsic_atomic_ref_ctor(
     ty_context, ref, ty_index, ty_retty_ref  # pylint: disable=unused-argument
@@ -294,3 +351,168 @@ def ol_fetch_add_impl(atomic_ref, val):
         return _intrinsic_fetch_add(atomic_ref, val)
 
     return ol_fetch_add_impl
+
+
+@overload_method(AtomicRefType, "fetch_sub", target=DPEX_KERNEL_EXP_TARGET_NAME)
+def ol_fetch_sub(atomic_ref, val):
+    """SPIR-V overload for
+    :meth:`numba_dpex.experimental.kernel_iface.AtomicRef.fetch_sub`.
+
+    Generates the same LLVM IR instruction as dpcpp for the
+    `atomic_ref::fetch_sub` function.
+
+    Raises:
+        TypingError: When the dtype of the aggregator value does not match the
+        dtype of the AtomicRef type.
+    """
+    if atomic_ref.dtype != val:
+        raise errors.TypingError(
+            f"Type of value to sub: {val} does not match the type of the "
+            f"reference: {atomic_ref.dtype} stored in the atomic ref."
+        )
+
+    def ol_fetch_sub_impl(atomic_ref, val):
+        # pylint: disable=no-value-for-parameter
+        return _intrinsic_fetch_sub(atomic_ref, val)
+
+    return ol_fetch_sub_impl
+
+
+@overload_method(AtomicRefType, "fetch_min", target=DPEX_KERNEL_EXP_TARGET_NAME)
+def ol_fetch_min(atomic_ref, val):
+    """SPIR-V overload for
+    :meth:`numba_dpex.experimental.kernel_iface.AtomicRef.fetch_min`.
+
+    Generates the same LLVM IR instruction as dpcpp for the
+    `atomic_ref::fetch_min` function.
+
+    Raises:
+        TypingError: When the dtype of the aggregator value does not match the
+        dtype of the AtomicRef type.
+    """
+    if atomic_ref.dtype != val:
+        raise errors.TypingError(
+            f"Type of value to find min: {val} does not match the type of the "
+            f"reference: {atomic_ref.dtype} stored in the atomic ref."
+        )
+
+    def ol_fetch_min_impl(atomic_ref, val):
+        # pylint: disable=no-value-for-parameter
+        return _intrinsic_fetch_min(atomic_ref, val)
+
+    return ol_fetch_min_impl
+
+
+@overload_method(AtomicRefType, "fetch_max", target=DPEX_KERNEL_EXP_TARGET_NAME)
+def ol_fetch_max(atomic_ref, val):
+    """SPIR-V overload for
+    :meth:`numba_dpex.experimental.kernel_iface.AtomicRef.fetch_max`.
+
+    Generates the same LLVM IR instruction as dpcpp for the
+    `atomic_ref::fetch_max` function.
+
+    Raises:
+        TypingError: When the dtype of the aggregator value does not match the
+        dtype of the AtomicRef type.
+    """
+    if atomic_ref.dtype != val:
+        raise errors.TypingError(
+            f"Type of value to find max: {val} does not match the type of the "
+            f"reference: {atomic_ref.dtype} stored in the atomic ref."
+        )
+
+    def ol_fetch_max_impl(atomic_ref, val):
+        # pylint: disable=no-value-for-parameter
+        return _intrinsic_fetch_max(atomic_ref, val)
+
+    return ol_fetch_max_impl
+
+
+@overload_method(AtomicRefType, "fetch_and", target=DPEX_KERNEL_EXP_TARGET_NAME)
+def ol_fetch_and(atomic_ref, val):
+    """SPIR-V overload for
+    :meth:`numba_dpex.experimental.kernel_iface.AtomicRef.fetch_and`.
+
+    Generates the same LLVM IR instruction as dpcpp for the
+    `atomic_ref::fetch_and` function.
+
+    Raises:
+        TypingError: When the dtype of the aggregator value does not match the
+        dtype of the AtomicRef type.
+    """
+    if atomic_ref.dtype != val:
+        raise errors.TypingError(
+            f"Type of value to and: {val} does not match the type of the "
+            f"reference: {atomic_ref.dtype} stored in the atomic ref."
+        )
+
+    if atomic_ref.dtype not in (types.int32, types.int64):
+        raise errors.TypingError(
+            "fetch_and operation only supported on int32 and int64 dtypes."
+        )
+
+    def ol_fetch_and_impl(atomic_ref, val):
+        # pylint: disable=no-value-for-parameter
+        return _intrinsic_fetch_and(atomic_ref, val)
+
+    return ol_fetch_and_impl
+
+
+@overload_method(AtomicRefType, "fetch_or", target=DPEX_KERNEL_EXP_TARGET_NAME)
+def ol_fetch_or(atomic_ref, val):
+    """SPIR-V overload for
+    :meth:`numba_dpex.experimental.kernel_iface.AtomicRef.fetch_or`.
+
+    Generates the same LLVM IR instruction as dpcpp for the
+    `atomic_ref::fetch_or` function.
+
+    Raises:
+        TypingError: When the dtype of the aggregator value does not match the
+        dtype of the AtomicRef type.
+    """
+    if atomic_ref.dtype != val:
+        raise errors.TypingError(
+            f"Type of value to or: {val} does not match the type of the "
+            f"reference: {atomic_ref.dtype} stored in the atomic ref."
+        )
+
+    if atomic_ref.dtype not in (types.int32, types.int64):
+        raise errors.TypingError(
+            "fetch_or operation only supported on int32 and int64 dtypes."
+        )
+
+    def ol_fetch_or_impl(atomic_ref, val):
+        # pylint: disable=no-value-for-parameter
+        return _intrinsic_fetch_or(atomic_ref, val)
+
+    return ol_fetch_or_impl
+
+
+@overload_method(AtomicRefType, "fetch_xor", target=DPEX_KERNEL_EXP_TARGET_NAME)
+def ol_fetch_xor(atomic_ref, val):
+    """SPIR-V overload for
+    :meth:`numba_dpex.experimental.kernel_iface.AtomicRef.fetch_xor`.
+
+    Generates the same LLVM IR instruction as dpcpp for the
+    `atomic_ref::fetch_xor` function.
+
+    Raises:
+        TypingError: When the dtype of the aggregator value does not match the
+        dtype of the AtomicRef type.
+    """
+    if atomic_ref.dtype != val:
+        raise errors.TypingError(
+            f"Type of value to xor: {val} does not match the type of the "
+            f"reference: {atomic_ref.dtype} stored in the atomic ref."
+        )
+
+    if atomic_ref.dtype not in (types.int32, types.int64):
+        raise errors.TypingError(
+            "fetch_xor operation only supported on int32 and int64 dtypes."
+        )
+
+    def ol_fetch_xor_impl(atomic_ref, val):
+        # pylint: disable=no-value-for-parameter
+        return _intrinsic_fetch_xor(atomic_ref, val)
+
+    return ol_fetch_xor_impl

numba_dpex/spirv_generator.py

@@ -159,7 +159,10 @@ def finalize(self):
         # TODO: find better approach to set SPIRV compiler arguments. Workaround
         #  against caching intrinsic that sets this argument.
         # https://github.com/IntelPython/numba-dpex/issues/1262
-        llvm_spirv_args = ["--spirv-ext=+SPV_EXT_shader_atomic_float_add"]
+        llvm_spirv_args = [
+            "--spirv-ext=+SPV_EXT_shader_atomic_float_add",
+            "--spirv-ext=+SPV_EXT_shader_atomic_float_min_max",
+        ]
         for key in list(self.context.extra_compile_options.keys()):
             if key == LLVM_SPIRV_ARGS:
                 llvm_spirv_args = self.context.extra_compile_options[key]

numba_dpex/tests/experimental/kernel_iface/spv_overloads/test_atomic_fetch_phi.py

@@ -4,6 +4,7 @@
 
 import dpnp
 import pytest
+from numba.core.errors import TypingError
 
 import numba_dpex as dpex
 import numba_dpex.experimental as dpex_exp
@@ -14,30 +15,80 @@
     no_bool=True, no_float16=True, no_none=True, no_complex=True
 )
 
+list_of_fetch_phi_funcs = [
+    "fetch_add",
+    "fetch_sub",
+    "fetch_min",
+    "fetch_max",
+    "fetch_and",
+    "fetch_or",
+    "fetch_xor",
+]
+
+
+@pytest.fixture(params=list_of_fetch_phi_funcs)
+def fetch_phi_fn(request):
+    return request.param
+
 
 @pytest.fixture(params=list_of_supported_dtypes)
 def input_arrays(request):
     # The size of input and out arrays to be used
     N = 10
-    a = dpnp.ones(N, dtype=request.param)
-    b = dpnp.zeros(N, dtype=request.param)
+    a = dpnp.arange(N, dtype=request.param)
+    b = dpnp.ones(N, dtype=request.param)
     return a, b
 
 
 @pytest.mark.parametrize("ref_index", [0, 5])
-def test_fetch_add(input_arrays, ref_index):
+def test_fetch_phi_fn(input_arrays, ref_index, fetch_phi_fn):
+    """A test for all fetch_phi atomic functions."""
+
     @dpex_exp.kernel
-    def atomic_ref_kernel(a, b, ref_index):
+    def _kernel(a, b, ref_index):
         i = dpex.get_global_id(0)
         v = AtomicRef(b, index=ref_index)
-        v.fetch_add(a[i])
+        getattr(v, fetch_phi_fn)(a[i])
 
     a, b = input_arrays
 
-    dpex_exp.call_kernel(atomic_ref_kernel, dpex.Range(10), a, b, ref_index)
+    if (
+        fetch_phi_fn in ["fetch_and", "fetch_or", "fetch_xor"]
+        and issubclass(a.dtype.type, dpnp.floating)
+        and issubclass(b.dtype.type, dpnp.floating)
+    ):
+        # fetch_and, fetch_or, fetch_xor accept only int arguments.
+        # test for TypingError when float arguments are passed.
+        with pytest.raises(TypingError):
+            dpex_exp.call_kernel(_kernel, dpex.Range(10), a, b, ref_index)
+    else:
+        dpex_exp.call_kernel(_kernel, dpex.Range(10), a, b, ref_index)
+        # Verify that `a` accumulated at b[ref_index] by kernel
+        # matches the `a` accumulated at  b[ref_index+1] using Python
+        for i in range(a.size):
+            v = AtomicRef(b, index=ref_index + 1)
+            getattr(v, fetch_phi_fn)(a[i])
+
+        assert b[ref_index] == b[ref_index + 1]
+
+
+def test_fetch_phi_diff_types(fetch_phi_fn):
+    """A negative test that verifies that a TypingError is raised if
+    AtomicRef type and value to be added are of different types.
+    """
+
+    @dpex_exp.kernel
+    def _kernel(a, b):
+        i = dpex.get_global_id(0)
+        v = AtomicRef(b, index=0)
+        getattr(v, fetch_phi_fn)(a[i])
+
+    N = 10
+    a = dpnp.ones(N, dtype=dpnp.float32)
+    b = dpnp.zeros(N, dtype=dpnp.int32)
 
-    # Verify that `a` was accumulated at b[ref_index]
-    assert b[ref_index] == 10
+    with pytest.raises(TypingError):
+        dpex_exp.call_kernel(_kernel, dpex.Range(10), a, b)
 
 
 @dpex_exp.kernel
@@ -54,7 +105,7 @@ def atomic_ref_1(a):
     v.fetch_add(a[i + 2])
 
 
-def test_spirv_compiler_flags():
+def test_spirv_compiler_flags_add():
     """Check if float atomic flag is being populated from intrinsic for the
     second call.
 
@@ -68,3 +119,36 @@ def test_spirv_compiler_flags():
 
     assert a[0] == N - 1
     assert a[1] == N - 1
+
+
+@dpex_exp.kernel
+def atomic_max_0(a):
+    i = dpex.get_global_id(0)
+    v = AtomicRef(a, index=0)
+    if i != 0:
+        v.fetch_max(a[i])
+
+
+@dpex_exp.kernel
+def atomic_max_1(a):
+    i = dpex.get_global_id(0)
+    v = AtomicRef(a, index=0)
+    if i != 0:
+        v.fetch_max(a[i])
+
+
+def test_spirv_compiler_flags_max():
+    """Check if float atomic flag is being populated from intrinsic for the
+    second call.
+
+    https://github.com/IntelPython/numba-dpex/issues/1262
+    """
+    N = 10
+    a = dpnp.arange(N, dtype=dpnp.float32)
+    b = dpnp.arange(N, dtype=dpnp.float32)
+
+    dpex_exp.call_kernel(atomic_max_0, dpex.Range(N), a)
+    dpex_exp.call_kernel(atomic_max_1, dpex.Range(N), b)
+
+    assert a[0] == N - 1
+    assert b[0] == N - 1