1 files changed, 93 insertions, 0 deletions
diff --git a/test cases/common/155 simd/simdchecker.c b/test cases/common/155 simd/simdchecker.c
new file mode 100644
index 000000000..222fbf3e3
--- /dev/null
+++ b/test cases/common/155 simd/simdchecker.c
@@ -0,0 +1,93 @@
+#include<simdfuncs.h>
+#include<stdio.h>
+
+/*
+ * A function that checks at runtime which simd accelerations are
+ * available and calls the best one. Falls
+ * back to plain C implementation if SIMD is not available.
+ */
+
+int main(int argc, char **argv) {
+    float four[4] = {2.0, 3.0, 4.0, 5.0};
+    const float expected[4] = {3.0, 4.0, 5.0, 6.0};
+    void (*fptr)(float[4]) = NULL;
+    const char *type;
+    int i;
+
+/* Add here. The first matched one is used so put "better" instruction
+ * sets at the top.
+ */
+#if HAVE_NEON
+    if(fptr == NULL && neon_available()) {
+        fptr = increment_neon;
+        type = "NEON";
+    }
+#endif
+#if HAVE_AVX2
+    if(fptr == NULL && avx2_available()) {
+        fptr = increment_avx2;
+        type = "AVX2";
+    }
+#endif
+#if HAVE_AVX
+    if(fptr == NULL && avx_available()) {
+        fptr = increment_avx;
+        type = "AVX";
+    }
+#endif
+#if HAVE_SSE42
+    if(fptr == NULL && sse42_available()) {
+        fptr = increment_sse42;
+        type = "SSE42";
+    }
+#endif
+#if HAVE_SSE41
+    if(fptr == NULL && sse41_available()) {
+        fptr = increment_sse41;
+        type = "SSE41";
+    }
+#endif
+#if HAVE_SSSE3
+    if(fptr == NULL && ssse3_available()) {
+        fptr = increment_ssse3;
+        type = "SSSE3";
+    }
+#endif
+#if HAVE_SSE3
+    if(fptr == NULL && sse3_available()) {
+        fptr = increment_sse3;
+        type = "SSE3";
+    }
+#endif
+#if HAVE_SSE2
+    if(fptr == NULL && sse2_available()) {
+        fptr = increment_sse2;
+        type = "SSE2";
+    }
+#endif
+#if HAVE_SSE
+    if(fptr == NULL && sse_available()) {
+        fptr = increment_sse;
+        type = "SSE";
+    }
+#endif
+#if HAVE_MMX
+    if(fptr == NULL && mmx_available()) {
+        fptr = increment_mmx;
+        type = "MMX";
+    }
+#endif
+    if(fptr == NULL) {
+        fptr = increment_fallback;
+        type = "fallback";
+    }
+    printf("Using %s.\n", type);
+    fptr(four);
+    for(i=0; i<4; i++) {
+        if(four[i] != expected[i]) {
+            printf("Increment function failed, got %f expected %f.\n", four[i], expected[i]);
+            return 1;
+        }
+    }
+    return 0;
+}