diff --git a/main.c b/main.c
new file mode 100644
index 0000000..3758d1b
--- /dev/null
+++ b/main.c
@@ -0,0 +1,70 @@
+// SPDX-License-Identifier: MIT
+// Copyright (c) 2024 nihui (https://github.com/nihui)
+// Copyright (c) 2024 kernelbin (https://github.com/kernelbin)
+//
+// ruapu --- detect cpu isa features with single-file
+
+#include <stdio.h>
+
+#define RUAPU_IMPLEMENTATION
+#include "ruapu.h"
+
+int main()
+{
+    raupu_init();
+
+#define PRINT_ISA_SUPPORT(isa) fprintf(stderr, "%s = %d\n", #isa, ruapu_supports(#isa));
+
+#if defined(__i386__) || defined(__x86_64__) || defined(_M_IX86) || defined(_M_X64)
+    PRINT_ISA_SUPPORT(mmx)
+    PRINT_ISA_SUPPORT(sse)
+    PRINT_ISA_SUPPORT(sse2)
+    PRINT_ISA_SUPPORT(sse3)
+    PRINT_ISA_SUPPORT(ssse3)
+    PRINT_ISA_SUPPORT(sse41)
+    PRINT_ISA_SUPPORT(sse42)
+    PRINT_ISA_SUPPORT(sse4a)
+    PRINT_ISA_SUPPORT(xop)
+    PRINT_ISA_SUPPORT(avx)
+    PRINT_ISA_SUPPORT(f16c)
+    PRINT_ISA_SUPPORT(fma)
+    PRINT_ISA_SUPPORT(avx2)
+    PRINT_ISA_SUPPORT(avx512f)
+    PRINT_ISA_SUPPORT(avx512bw)
+    PRINT_ISA_SUPPORT(avx512cd)
+    PRINT_ISA_SUPPORT(avx512dq)
+    PRINT_ISA_SUPPORT(avx512vl)
+    PRINT_ISA_SUPPORT(avx512vnni)
+    PRINT_ISA_SUPPORT(avx512bf16)
+    PRINT_ISA_SUPPORT(avx512ifma)
+    PRINT_ISA_SUPPORT(avx512vbmi)
+    PRINT_ISA_SUPPORT(avx512vbmi2)
+    PRINT_ISA_SUPPORT(avx512fp16)
+    PRINT_ISA_SUPPORT(avxvnni)
+    PRINT_ISA_SUPPORT(avxvnniint8)
+    PRINT_ISA_SUPPORT(avxifma)
+
+#elif __aarch64__
+    PRINT_ISA_SUPPORT(neon)
+    PRINT_ISA_SUPPORT(vfpv4)
+    PRINT_ISA_SUPPORT(cpuid)
+    PRINT_ISA_SUPPORT(asimdhp)
+    PRINT_ISA_SUPPORT(asimddp)
+    PRINT_ISA_SUPPORT(asimdfhm)
+    PRINT_ISA_SUPPORT(bf16)
+    PRINT_ISA_SUPPORT(i8mm)
+    PRINT_ISA_SUPPORT(sve)
+    PRINT_ISA_SUPPORT(sve2)
+    PRINT_ISA_SUPPORT(svebf16)
+    PRINT_ISA_SUPPORT(svei8mm)
+    PRINT_ISA_SUPPORT(svef32mm)
+
+#elif __arm__
+    PRINT_ISA_SUPPORT(edsp)
+    PRINT_ISA_SUPPORT(neon)
+    PRINT_ISA_SUPPORT(vfpv4)
+
+#endif
+
+    return 0;
+}
diff --git a/ruapu.h b/ruapu.h
new file mode 100644
index 0000000..b62398b
--- /dev/null
+++ b/ruapu.h
@@ -0,0 +1,20 @@
+// SPDX-License-Identifier: MIT
+// Copyright (c) 2024 nihui (https://github.com/nihui)
+// Copyright (c) 2024 kernelbin (https://github.com/kernelbin)
+//
+// ruapu --- detect cpu isa features with single-file
+
+#ifndef RUAPU_H
+#define RUAPU_H
+
+void raupu_init()
+{
+}
+
+int ruapu_supports(const char* isa)
+{
+    (void)isa;
+    return 0;
+}
+
+#endif // RUAPU_H