Add ISPC compiler support to CMake

3 files changed, 47 insertions, 0 deletions

diff --git a/Tests/ISPC/TryCompile/CMakeLists.txt b/Tests/ISPC/TryCompile/CMakeLists.txt
new file mode 100644
index 0000000..742f511
--- /dev/null
+++ b/Tests/ISPC/TryCompile/CMakeLists.txt
@@ -0,0 +1,16 @@
+
+cmake_minimum_required(VERSION 3.18)
+project(ISPCTryCompile ISPC CXX)
+
+set(CMAKE_NINJA_FORCE_RESPONSE_FILE ON)
+if(CMAKE_SIZEOF_VOID_P EQUAL 4)
+  set(CMAKE_ISPC_FLAGS "--arch=x86")
+endif()
+
+#Verify we can use try_compile with ISPC
+try_compile(result "${CMAKE_CURRENT_BINARY_DIR}"
+        SOURCES "${CMAKE_CURRENT_SOURCE_DIR}/simple.ispc"
+        COPY_FILE "${CMAKE_CURRENT_BINARY_DIR}/result.o")
+
+add_executable(ISPCTryCompile main.cxx )
+target_link_libraries(ISPCTryCompile "${CMAKE_CURRENT_BINARY_DIR}/result.o")
diff --git a/Tests/ISPC/TryCompile/main.cxx b/Tests/ISPC/TryCompile/main.cxx
new file mode 100644
index 0000000..c8d1ed6
--- /dev/null
+++ b/Tests/ISPC/TryCompile/main.cxx
@@ -0,0 +1,19 @@
+#include <stdio.h>
+
+namespace ispc {
+extern "C" {
+void simple(float*, float*, int);
+}
+}
+
+int main()
+{
+  float vin[16], vout[16];
+  for (int i = 0; i < 16; ++i)
+    vin[i] = i;
+
+  ispc::simple(vin, vout, 16);
+
+  for (int i = 0; i < 16; ++i)
+    printf("%d: simple(%f) = %f\n", i, vin[i], vout[i]);
+}
diff --git a/Tests/ISPC/TryCompile/simple.ispc b/Tests/ISPC/TryCompile/simple.ispc
new file mode 100644
index 0000000..70cb588
--- /dev/null
+++ b/Tests/ISPC/TryCompile/simple.ispc
@@ -0,0 +1,12 @@
+
+export void simple(uniform float vin[], uniform float vout[],
+                   uniform int count) {
+    foreach (index = 0 ... count) {
+        float v = vin[index];
+        if (v < 3.)
+            v = v * v;
+        else
+            v = sqrt(v);
+        vout[index] = v;
+    }
+}