Changes to support NumPy 2.0

.github/workflows/build_pip.yaml

@@ -0,0 +1,58 @@
+name: Editable build using pip and pre-release NumPy
+
+on: push
+
+permissions: read-all
+
+env:
+  PACKAGE_NAME: mkl_fft
+  MODULE_NAME: mkl_fft
+  TEST_ENV_NAME: test_mkl_fft
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+         shell: bash -el {0}
+
+    strategy:
+      matrix:
+        python: ['3.9', '3.10', '3.11', '3.12']
+        use_pre: ["", "--pre"]
+
+    steps:
+      - name: Install jq
+        shell: bash -l {0}
+        run: |
+          sudo apt-get install jq
+
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - uses: conda-incubator/setup-miniconda@v3
+        with:
+          use-mamba: true
+          mamba-version: "*"
+          channels: conda-forge
+          activate-environment: test
+          python-version: ${{ matrix.python }}
+
+      - name: Install MKL
+        run: |
+          conda install -c conda-forge mkl-devel mkl-service --override-channels
+          conda activate test
+          python -c "import sys; print(sys.executable)"
+          which python
+          python -c "import mkl; print(mkl.__file__)"
+
+      - name: Build conda package
+        run: |
+          conda activate test
+          pip install --no-cache-dir cython pytest hypothesis
+          pip install --no-cache-dir numpy ${{ matrix.use_pre }}
+          echo "CONDA_PREFFIX is '${CONDA_PREFIX}'"
+          export MKLROOT=${CONDA_PREFIX}
+          pip install -e . --no-build-isolation --verbose --no-deps
+          python -m pytest -v mkl_fft/tests

.github/workflows/conda-package.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python: ['3.10']
+        python: ['3.9', '3.10']
     steps:
       - uses: actions/checkout@v4
         with:
@@ -62,7 +62,7 @@ jobs:
 
     strategy:
       matrix:
-        python: ['3.10']
+        python: ['3.9', '3.10']
         experimental: [false]
         runner: [ubuntu-latest]
     continue-on-error: ${{ matrix.experimental }}
@@ -120,11 +120,11 @@ jobs:
           pytest -v --pyargs $MODULE_NAME
 
   build_windows:
-    runs-on: windows-latest
+    runs-on: windows-2019
 
     strategy:
       matrix:
-        python: ['3.10']
+        python: ['3.9', '3.10']
     env:
       conda-bld: C:\Miniconda\conda-bld\win-64\
     steps:
@@ -165,9 +165,9 @@ jobs:
         shell: cmd /C CALL {0}
     strategy:
       matrix:
-        python: ['3.10']
+        python: ['3.9', '3.10']
         experimental: [false]
-        runner: [windows-latest]
+        runner: [windows-2019]
     continue-on-error: ${{ matrix.experimental }}
     env:
       workdir: '${{ github.workspace }}'

mkl_fft/_float_utils.py

@@ -59,7 +59,7 @@ def __downcast_float128_array(x):
         xdt = x.dtype
         if xdt == np.longdouble and not xdt == np.float64:
             return np.asarray(x, dtype=np.float64)
-        elif xdt == np.longcomplex and not xdt == np.complex_:
+        elif xdt == np.clongdouble and not xdt == np.complex_:
             return np.asarray(x, dtype=np.complex_)
     if not isinstance(x, np.ndarray):
         __x = np.asarray(x)

mkl_fft/_numpy_fft.py

@@ -56,7 +56,7 @@
 __all__ = ['fft', 'ifft', 'rfft', 'irfft', 'hfft', 'ihfft', 'rfftn',
            'irfftn', 'rfft2', 'irfft2', 'fft2', 'ifft2', 'fftn', 'ifftn']
 
-from numpy.core import (array, asarray, asanyarray, shape, conjugate, take, sqrt, prod)
+from numpy import (array, asarray, asanyarray, shape, conjugate, take, sqrt, prod)
 
 import numpy
 from . import _pydfti as mkl_fft

mkl_fft/_pydfti.pyx

@@ -29,7 +29,10 @@
 # imports
 import sys
 import numpy as np
-from numpy.core._multiarray_tests import internal_overlap
+if np.lib.NumpyVersion(np.__version__) >= "2.0.0a0":
+    from numpy._core._multiarray_tests import internal_overlap
+else:
+    from numpy.core._multiarray_tests import internal_overlap
 from threading import local as threading_local
 
 # cimports
@@ -133,11 +136,6 @@ cdef extern from "src/mklfft.h":
     int double_cdouble_mkl_ifftnd_out(cnp.ndarray, cnp.ndarray, double)
     char * mkl_dfti_error(int)
 
-# Initialize numpy
-cdef int numpy_import_status = cnp.import_array()
-if numpy_import_status < 0:
-    raise ImportError("Failed to import NumPy as dependency of mkl_fft")
-
 
 cdef int _datacopied(cnp.ndarray arr, object orig):
     """
@@ -217,7 +215,7 @@ cdef cnp.ndarray  __process_arguments(object x, object n, object axis,
           cnp.NPY_ELEMENTSTRIDES | cnp.NPY_ENSUREARRAY | cnp.NPY_NOTSWAPPED,
           NULL)
 
-    if <void *> x_arr is NULL:
+    if (<void *> x_arr) is NULL:
         raise ValueError("An input argument x is not an array-like object")
 
     if _datacopied(x_arr, x):

mkl_fft/_scipy_fft_backend.py

@@ -28,7 +28,7 @@
 from . import _float_utils
 import mkl
 
-from numpy.core import (take, sqrt, prod)
+from numpy import (take, sqrt, prod)
 import contextvars
 import contextlib
 import operator

mkl_fft/src/mklfft.c.src

@@ -1,5 +1,5 @@
 /*
- Copyright (c) 2017-2020, Intel Corporation
+ Copyright (c) 2017-2024, Intel Corporation
 
  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions are met:
@@ -25,9 +25,9 @@
  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#define NPY_NO_DEPRECATED_API NPY_API_VERSION
-
+#define PY_SSIZE_T_CLEAN
 #include "Python.h"
+#define NO_IMPORT_ARRAY
 #include "numpy/arrayobject.h"
 #include "mklfft.h"
 #include "multi_iter.h"
@@ -81,13 +81,17 @@ static NPY_INLINE void get_basic_array_data(
     npy_intp *x_size)
 {
     npy_intp asize = 0;
+    npy_intp elsz = 0;
+    int x_ndim = 0;
     assert(x != NULL);
 
-    *x_rank = PyArray_NDIM(x);
+    x_ndim = PyArray_NDIM(x);
+    *x_rank = x_ndim;
     *x_shape = PyArray_SHAPE(x);
     *x_strides = PyArray_STRIDES(x);
-    *x_itemsize = PyArray_ITEMSIZE(x);
-    asize = ar_size(*x_shape, *x_rank);
+    elsz = PyArray_ITEMSIZE(x);
+    *x_itemsize = elsz;
+    asize = ar_size(*x_shape, x_ndim);
     *x_size = asize;
 }
 

mkl_fft/src/mklfft.h

@@ -25,6 +25,7 @@
  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 #include "mkl.h"
+#include "numpy/arrayobject.h"
 
 typedef struct DftiCache {
     DFTI_DESCRIPTOR_HANDLE hand;

setup.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python
-# Copyright (c) 2017-2023, Intel Corporation
+# Copyright (c) 2017-2024, Intel Corporation
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are met:
@@ -49,10 +49,10 @@
 Programming Language :: C
 Programming Language :: Python
 Programming Language :: Python :: 3
-Programming Language :: Python :: 3.7
-Programming Language :: Python :: 3.8
 Programming Language :: Python :: 3.9
 Programming Language :: Python :: 3.10
+Programming Language :: Python :: 3.11
+Programming Language :: Python :: 3.12
 Programming Language :: Python :: Implementation :: CPython
 Topic :: Software Development
 Topic :: Scientific/Engineering
@@ -104,7 +104,8 @@ def extensions():
             extra_compile_args = [
                 '-DNDEBUG',
                 # '-ggdb', '-O0', '-Wall', '-Wextra', '-DDEBUG',
-            ]
+            ],
+            define_macros=[("NPY_NO_DEPRECATED_API", None), ("PY_ARRAY_UNIQUE_SYMBOL", "mkl_fft_ext")]
         )
     ]