Merge remote-tracking branch 'origin/master' into principled-v2

1 files changed, 41 insertions, 0 deletions

diff --git a/intern/cycles/util/guiding.h b/intern/cycles/util/guiding.h
new file mode 100644
index 00000000000..7dc74f0d8c0
--- /dev/null
+++ b/intern/cycles/util/guiding.h
@@ -0,0 +1,41 @@
+/* SPDX-License-Identifier: Apache-2.0
+ * Copyright 2022 Blender Foundation */
+
+#pragma once
+
+#ifdef WITH_PATH_GUIDING
+#  include <openpgl/cpp/OpenPGL.h>
+#  include <openpgl/version.h>
+#endif
+
+#include "util/system.h"
+
+CCL_NAMESPACE_BEGIN
+
+static int guiding_device_type()
+{
+#ifdef WITH_PATH_GUIDING
+#  if defined(__ARM_NEON)
+  return 8;
+#  else
+#    if OPENPGL_VERSION_MINOR >= 4
+  if (system_cpu_support_avx2()) {
+    return 8;
+  }
+#    endif
+  if (system_cpu_support_sse41()) {
+    return 4;
+  }
+  return 0;
+#  endif
+#else
+  return 0;
+#endif
+}
+
+static inline bool guiding_supported()
+{
+  return guiding_device_type() != 0;
+}
+
+CCL_NAMESPACE_END