1 files changed, 67 insertions, 0 deletions
diff --git a/compat/zlib/contrib/crc32vx/CMakeLists.txt b/compat/zlib/contrib/crc32vx/CMakeLists.txt
new file mode 100644
index 0000000..ee46fa3
--- /dev/null
+++ b/compat/zlib/contrib/crc32vx/CMakeLists.txt
@@ -0,0 +1,67 @@
+# check if we compile for IBM s390x
+#
+CHECK_C_SOURCE_COMPILES("
+#ifndef __s390x__
+    #error
+#endif
+int main() {return 0;}
+" HAS_S390X_SUPPORT)
+
+#
+# Check for IBM S390X - VX extensions
+#
+if(ZLIB_WITH_CRC32VX AND HAS_S390X_SUPPORT)
+    # preset the compiler specific flags
+    if (CMAKE_C_COMPILER_ID STREQUAL "Clang")
+        set(VGFMAFLAG "-fzvector")
+    else()
+        set(VGFMAFLAG "-mzarch")
+    endif(CMAKE_C_COMPILER_ID STREQUAL "Clang")
+
+    set(S390X_VX_TEST
+        "#ifndef __s390x__ \n\
+        #error \n\
+        #endif \n\
+        #include <vecintrin.h> \n\
+        int main(void) { \
+           unsigned long long a __attribute__((vector_size(16))) = { 0 }; \
+           unsigned long long b __attribute__((vector_size(16))) = { 0 }; \
+           unsigned char c __attribute__((vector_size(16))) = { 0 }; \
+           c = vec_gfmsum_accum_128(a, b, c); \
+           return c[0]; \
+        }")
+
+    # cflags already contains a valid march
+    set(CMAKE_REQUIRED_FLAGS "${VGFMAFLAG}")
+    check_c_source_compiles("${S390X_VX_TEST}" HAS_S390X_VX_SUPPORT)
+    unset(CMAKE_REQUIRED_FLAGS)
+
+    # or set march for our compile units
+    if(NOT HAS_S390X_VX_SUPPORT)
+        set(CMAKE_REQUIRED_FLAGS "${VGFMAFLAG} -march=z13")
+        check_c_source_compiles("${S390X_VX_TEST}" HAS_Z13_S390X_VX_SUPPORT)
+        unset(CMAKE_REQUIRED_FLAGS )
+        list(APPEND VGFMAFLAG "-march=z13")
+    endif(NOT HAS_S390X_VX_SUPPORT)
+
+    # prepare compiling for s390x
+    if(HAS_S390X_VX_SUPPORT OR HAS_Z13_S390X_VX_SUPPORT)
+        if(ZLIB_BUILD_SHARED)
+            target_sources(zlib
+                PRIVATE
+                    crc32_vx.c
+                    crc32_vx_hooks.h)
+            target_compile_definitions(zlib PUBLIC -DHAVE_S390X_VX=1)
+        endif(ZLIB_BUILD_SHARED)
+        if(ZLIB_BUILD_STATIC)
+            target_sources(zlibstatic
+                PRIVATE
+                    crc32_vx.c
+                    crc32_vx_hooks.h)
+            target_compile_definitions(zlibstatic PUBLIC -DHAVE_S390X_VX=1)
+        endif(ZLIB_BUILD_STATIC)
+        set_source_files_properties(
+            crc32_vx.c
+            PROPERTIES COMPILE_OPTIONS "${VGFMAFLAG}")
+    endif(HAS_S390X_VX_SUPPORT OR HAS_Z13_S390X_VX_SUPPORT)
+endif(ZLIB_WITH_CRC32VX AND HAS_S390X_SUPPORT)