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diff --git a/src/database/kernel_selection.hpp b/src/database/kernel_selection.hpp
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+
+// =================================================================================================
+// This file is part of the CLBlast project. The project is licensed under Apache Version 2.0. This
+// project loosely follows the Google C++ styleguide and uses a tab-size of two spaces and a max-
+// width of 100 characters per line.
+//
+// Author(s):
+//   Cedric Nugteren <www.cedricnugteren.nl>
+//
+// This determines when to switch between the direct (for small sizes) and in-direct GEMM kernel
+// with pre/post-processing kernels (for larger sizes). These can be set in a similar way as for the
+// regular kernel tuning parameters: they can be specific for a certain vendor or device or can use
+// some common default values.
+//
+// =================================================================================================
+
+namespace clblast {
+namespace database {
+// =================================================================================================
+
+const Database::DatabaseEntry KernelSelectionHalf = {
+  "KernelSelection", Precision::kHalf, {
+    { // Intel GPUs
+      kDeviceTypeGPU, "Intel", {
+        { "default",                                         { {"XGEMM_MIN_INDIRECT_SIZE",384*384*384} } },
+      }
+    },
+    { // NVIDIA GPUs
+      kDeviceTypeGPU, "NVIDIA", {
+        { "default",                                         { {"XGEMM_MIN_INDIRECT_SIZE",768*768*768} } },
+      }
+    },
+    { // Default
+      kDeviceTypeAll, "default", {
+        { "default",                                         { {"XGEMM_MIN_INDIRECT_SIZE",512*512*512} } },
+      }
+    },
+  }
+};
+
+// =================================================================================================
+
+const Database::DatabaseEntry KernelSelectionSingle = {
+  "KernelSelection", Precision::kSingle, {
+    { // Intel GPUs
+      kDeviceTypeGPU, "Intel", {
+        { "default",                                         { {"XGEMM_MIN_INDIRECT_SIZE",384*384*384} } },
+      }
+    },
+    { // NVIDIA GPUs
+      kDeviceTypeGPU, "NVIDIA", {
+        { "default",                                         { {"XGEMM_MIN_INDIRECT_SIZE",768*768*768} } },
+      }
+    },
+    { // Default
+      kDeviceTypeAll, "default", {
+        { "default",                                         { {"XGEMM_MIN_INDIRECT_SIZE",512*512*512} } },
+      }
+    },
+  }
+};
+
+// =================================================================================================
+
+const Database::DatabaseEntry KernelSelectionComplexSingle = {
+  "KernelSelection", Precision::kComplexSingle, {
+    { // Intel GPUs
+      kDeviceTypeGPU, "Intel", {
+        { "default",                                         { {"XGEMM_MIN_INDIRECT_SIZE",384*384*384} } },
+      }
+    },
+    { // NVIDIA GPUs
+      kDeviceTypeGPU, "NVIDIA", {
+        { "default",                                         { {"XGEMM_MIN_INDIRECT_SIZE",768*768*768} } },
+      }
+    },
+    { // Default
+      kDeviceTypeAll, "default", {
+        { "default",                                         { {"XGEMM_MIN_INDIRECT_SIZE",512*512*512} } },
+      }
+    },
+  }
+};
+
+// =================================================================================================
+
+const Database::DatabaseEntry KernelSelectionDouble = {
+  "KernelSelection", Precision::kDouble, {
+    { // Intel GPUs
+      kDeviceTypeGPU, "Intel", {
+        { "default",                                         { {"XGEMM_MIN_INDIRECT_SIZE",384*384*384} } },
+      }
+    },
+    { // NVIDIA GPUs
+      kDeviceTypeGPU, "NVIDIA", {
+        { "default",                                         { {"XGEMM_MIN_INDIRECT_SIZE",768*768*768} } },
+      }
+    },
+    { // Default
+      kDeviceTypeAll, "default", {
+        { "default",                                         { {"XGEMM_MIN_INDIRECT_SIZE",512*512*512} } },
+      }
+    },
+  }
+};
+
+// =================================================================================================
+
+const Database::DatabaseEntry KernelSelectionComplexDouble = {
+  "KernelSelection", Precision::kComplexDouble, {
+    { // Intel GPUs
+      kDeviceTypeGPU, "Intel", {
+        { "default",                                         { {"XGEMM_MIN_INDIRECT_SIZE",384*384*384} } },
+      }
+    },
+    { // NVIDIA GPUs
+      kDeviceTypeGPU, "NVIDIA", {
+        { "default",                                         { {"XGEMM_MIN_INDIRECT_SIZE",768*768*768} } },
+      }
+    },
+    { // Default
+      kDeviceTypeAll, "default", {
+        { "default",                                         { {"XGEMM_MIN_INDIRECT_SIZE",512*512*512} } },
+      }
+    },
+  }
+};
+
+// =================================================================================================
+} // namespace database
+} // namespace clblast