From 38c4959f6c69e070d5a194a2a2e3746971e72512 Mon Sep 17 00:00:00 2001
From: Jason Volk <jason@zemos.net>
Date: Sun, 1 Jan 2023 21:02:52 +0000
Subject: [PATCH] ircd::simt: Add macro to differentiate RDNA over GCN.

---
 include/ircd/simt/portable.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/include/ircd/simt/portable.h b/include/ircd/simt/portable.h
index a781d3c77..5fd92f111 100644
--- a/include/ircd/simt/portable.h
+++ b/include/ircd/simt/portable.h
@@ -85,3 +85,13 @@
 		#define __SIZEOF_FLOAT16__ 64
 	#endif
 #endif
+
+//
+// Differentiate RDNA over GCN
+//
+
+#if defined(__AMDGCN__) && !defined(__AMDDNA__)
+	#if __AMDGCN_WAVEFRONT_SIZE == 32
+		#define __AMDDNA__ 1
+	#endif
+#endif