ggml : add SSE2 detection for x86 backends

Author: danbev

ggml/include/ggml-cpu.h

@@ -75,6 +75,7 @@ extern "C" {
     //
 
     // x86
+    GGML_BACKEND_API int ggml_cpu_has_sse2       (void);
     GGML_BACKEND_API int ggml_cpu_has_sse3       (void);
     GGML_BACKEND_API int ggml_cpu_has_ssse3      (void);
     GGML_BACKEND_API int ggml_cpu_has_avx        (void);

ggml/src/ggml-cpu/ggml-cpu.c

@@ -3442,6 +3442,14 @@ int ggml_cpu_has_llamafile(void) {
 #endif
 }
 
+int ggml_cpu_has_sse2(void) {
+#if defined(__SSE2__)
+    return 1;
+#else
+    return 0;
+#endif
+}
+
 int ggml_cpu_has_sse3(void) {
 #if defined(__SSE3__)
     return 1;

ggml/src/ggml-cpu/ggml-cpu.cpp

@@ -516,6 +516,9 @@ static ggml_backend_feature * ggml_backend_cpu_get_features(ggml_backend_reg_t r
         ggml_cpu_init();
 
         std::vector<ggml_backend_feature> features;
+        if (ggml_cpu_has_sse2()) {
+            features.push_back({ "SSE2", "1" });
+        }
         if (ggml_cpu_has_sse3()) {
             features.push_back({ "SSE3", "1" });
         }