From c5da20e8e1177a57344a48232a8142405273ba22 Mon Sep 17 00:00:00 2001
From: The Tumultuous Unicorn Of Darkness
 <the-tumultuous-unicorn-of-darkness@gmx.com>
Date: Tue, 22 Apr 2025 19:07:29 +0200
Subject: [PATCH] utils: add decode_cpuid_revision

---
 .gitignore                    |  3 ++-
 utils/decode_cpuid_revision.c | 31 +++++++++++++++++++++++++++++++
 2 files changed, 33 insertions(+), 1 deletion(-)
 create mode 100644 utils/decode_cpuid_revision.c

diff --git a/.gitignore b/.gitignore
index 5f34a4c..152efe2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -37,7 +37,8 @@ ipch
 libcpuid/x32
 libcpuid/x64
 cpuid_tool/x32
-cpuid_tool/x64
+cpuid_tool/
+utils/decode_cpuid_revision
 *.vcxproj.user
 build
 /docs
diff --git a/utils/decode_cpuid_revision.c b/utils/decode_cpuid_revision.c
new file mode 100644
index 0000000..ed153cd
--- /dev/null
+++ b/utils/decode_cpuid_revision.c
@@ -0,0 +1,31 @@
+/* A simple tool to decode the "CPUID Revision".
+Build with:
+gcc decode_cpuid_revision.c -lcpuid -o decode_cpuid_revision
+*/
+#include <stdio.h>
+#include <stdlib.h>
+#include "../libcpuid/libcpuid.h"
+
+#define ANSWER_TO_THE_ULTIMATE_QUESTION_OF_LIFE_THE_UNIVERSE_AND_EVERYTHING 42
+
+
+int main(int argc, char** argv)
+{
+	struct cpu_raw_data_t raw;
+	struct cpu_id_t data;
+
+	if (argc < 2) {
+		printf("%s: x86 CPUID Revision is required as argument.\n", argv[0]);
+		return 1;
+	}
+	raw.basic_cpuid[0][EAX] = ANSWER_TO_THE_ULTIMATE_QUESTION_OF_LIFE_THE_UNIVERSE_AND_EVERYTHING;
+	raw.basic_cpuid[1][EAX] = strtol(argv[1], NULL, 16);
+	cpu_identify(&raw, &data);
+
+	printf("%s decoded to:\n", argv[1]);
+	printf("  family     : %1$d (%1$02Xh)\n", data.x86.family);
+	printf("  model      : %1$d (%1$02Xh)\n", data.x86.model);
+	printf("  stepping   : %1$d (%1$02Xh)\n", data.x86.stepping);
+	printf("  ext_family : %1$d (%1$02Xh)\n", data.x86.ext_family);
+	printf("  ext_model  : %1$d (%1$02Xh)\n", data.x86.ext_model);
+}