BLD: Use numpy detection of SSE

Let numpy detect SSE2
numpy · seberg · May 28, 2019 · Feb 20, 2018 · Feb 22, 2018 · Feb 23, 2018
commit 720a0a9a6baa3cb0ded826933807b2be061bfe2c
diff --git a/numpy/random/setup.py b/numpy/random/setup.py
@@ -65,15 +65,6 @@ def generate_libraries(ext, build_dir):
     ##############################
 
     # Make a guess as to whether SSE2
8000
 is present for now, TODO: Improve
-    USE_SSE2 = False
-    for k in platform.uname():
-        for val in ('x86', 'i686', 'i386', 'amd64'):
-            USE_SSE2 = USE_SSE2 or val in k.lower()
-    print('Building with SSE?: {0}'.format(USE_SSE2))
-    if '--no-sse2' in sys.argv:
-        USE_SSE2 = False
-        sys.argv.remove('--no-sse2')
-
     DEBUG = False
     EXTRA_LINK_ARGS = []
     EXTRA_LIBRARIES = ['m'] if os.name != 'nt' else []
@@ -86,15 +77,15 @@ def generate_libraries(ext, build_dir):
             EXTRA_COMPILE_ARGS += ["-Zi", "/Od"]
 
     LEGACY_DEFS = [('NP_RANDOM_LEGACY', '1')]
-    DSFMT_DEFS = [('DSFMT_MEXP', '19937')]
-    if USE_SSE2:
-        if os.name == 'nt':
-            EXTRA_COMPILE_ARGS += ['/wd4146', '/GL']
-            if struct.calcsize('P') < 8:
-                EXTRA_COMPILE_ARGS += ['/arch:SSE2']
-        else:
-            EXTRA_COMPILE_ARGS += ['-msse2']
-        DSFMT_DEFS += [('HAVE_SSE2', '1')]
+    DSFMT_DEFS = [('DSFMT_MEXP', '19937'), ("HAVE_NPY_CONFIG_H", "1")]
+    INTEL_LIKE = any([val in k.lower() for k in platform.uname()
+                      for val in ('x86', 'i686', 'i386', 'amd64')])
+    if os.name == 'nt':
+        EXTRA_COMPILE_ARGS += ['/wd4146', '/GL']
+        if struct.calcsize('P') < 8:
+            EXTRA_COMPILE_ARGS += ['/arch:SSE2']
+    elif INTEL_LIKE:
+        EXTRA_COMPILE_ARGS += ['-msse2']
 
     config.add_extension('entropy',
                         sources=['entropy.c', 'src/entropy/entropy.c'],

diff --git a/numpy/random/src/dsfmt/dSFMT.h b/numpy/random/src/dsfmt/dSFMT.h
@@ -41,6 +41,12 @@ extern "C" {
 #include <assert.h>
 #include <stdio.h>
 
+/* Use NumPy config to determine if SSE2 is present */
+#include "numpy/npy_common.h"
+#if defined NPY_HAVE_SSE2_INTRINSICS
+#define HAVE_SSE2 1
+#endif
+
 #if !defined(DSFMT_MEXP)
 #ifdef __GNUC__
 #warning "DSFMT_MEXP is not defined. I assume DSFMT_MEXP is 19937."