Revamp hardware tester to print to stdout the result in single word.

test_hw.cpp

@@ -5,21 +5,25 @@ int main(int argc, char *argv[])
 {
     static bool avx = __builtin_cpu_supports("avx");
     static bool avx2 = __builtin_cpu_supports("avx2");
-    static bool avx512f = __builtin_cpu_supports("avx512f");
-    static bool avx512vbmi = __builtin_cpu_supports("avx512vbmi");
-    static bool avx512vnni = __builtin_cpu_supports("avx512vnni");
     static bool fma = __builtin_cpu_supports("fma");
     static bool sse3 = __builtin_cpu_supports("sse3");
     static std::string s;
-    s  = "My hardware supports:\n";
-    s += "AVX = "         + std::to_string(avx)         + "\n";
-    s += "AVX2 = "        + std::to_string(avx2)        + "\n";
-    s += "AVX512 = "      + std::to_string(avx512f)     + "\n";
-    s += "AVX512_VBMI = " + std::to_string(avx512vbmi)  + "\n";
-    s += "AVX512_VNNI = " + std::to_string(avx512vnni)  + "\n";
-    s += "FMA = "         + std::to_string(fma)         + "\n";
-    s += "SSE3 = "        + std::to_string(sse3)        + "\n";
-    printf("%s", s.c_str());
+    s  = "gpt4all hardware test results:\n";
+    s += "    AVX  = "         + std::to_string(avx)         + "\n";
+    s += "    AVX2 = "        + std::to_string(avx2)        + "\n";
+    s += "    FMA  = "         + std::to_string(fma)         + "\n";
+    s += "    SSE3 = "        + std::to_string(sse3)        + "\n";
+    fprintf(stderr, "%s", s.c_str());
+    fprintf(stderr, "your hardware supports the \"");
+    fflush(stderr);
+    if (avx2)
+        printf("full");
+    else if (avx && fma)
+        printf("avx_only");
+    else
+        printf("bare_minimum");
     fflush(stdout);
+    fprintf(stderr, "\" version of gpt4all.\n");
+    fflush(stderr);
     return 0;
 }