--- build/premake/premake5.lua
+++ build/premake/premake5.lua
@@ -85,6 +85,8 @@ else
 			arch = "arm"
 		elseif string.find(machine, "aarch64") == 1 then
 			arch = "aarch64"
+		elseif string.find(machine, "ppc64") == 1 or string.find(machine, "powerpc64") == 1 then
+			arch = "ppc64"
 		elseif string.find(machine, "e2k") == 1 then
 			arch = "e2k"
 		else
@@ -863,6 +865,8 @@ function setup_all_libs ()
 		table.insert(source_dirs, "lib/sysdep/arch/arm");
 	elseif arch == "aarch64" then
 		table.insert(source_dirs, "lib/sysdep/arch/aarch64");
+	elseif arch == "ppc64" then
+		table.insert(source_dirs, "lib/sysdep/arch/ppc64");
 	elseif arch == "e2k" then
 		table.insert(source_dirs, "lib/sysdep/arch/e2k");
 	end
--- /dev/null
+++ source/lib/sysdep/arch/ppc64/ppc64.cpp
@@ -0,0 +1,50 @@
+/* Copyright (C) 2012 Wildfire Games
+ * Copyright (C) 2018 Raptor Engineering, LLC
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/*
+ * routines specific to POWER
+ */
+
+#include "precompiled.h"
+
+#include "lib/sysdep/cpu.h"
+
+intptr_t cpu_AtomicAdd(volatile intptr_t* location, intptr_t increment)
+{
+	return __sync_fetch_and_add(location, increment);
+}
+
+bool cpu_CAS(volatile intptr_t* location, intptr_t expected, intptr_t newValue)
+{
+	return __sync_bool_compare_and_swap(location, expected, newValue);
+}
+
+bool cpu_CAS64(volatile i64* location, i64 expected, i64 newValue)
+{
+	return __sync_bool_compare_and_swap(location, expected, newValue);
+}
+
+const char* cpu_IdentifierString()
+{
+	return "IBM POWER"; // TODO
+}
--- source/lib/byte_order.h.orig	2021-02-28 16:59:34.041933978 +0100
+++ source/lib/byte_order.h	2021-02-28 16:59:59.311582587 +0100
@@ -33,7 +33,7 @@
 #ifndef BYTE_ORDER
 # define LITTLE_ENDIAN 0x4321
 # define BIG_ENDIAN    0x1234
-# if ARCH_IA32 || ARCH_IA64 || ARCH_AMD64 || ARCH_ALPHA || ARCH_ARM || ARCH_AARCH64 || ARCH_MIPS || ARCH_E2K || defined(__LITTLE_ENDIAN__)
+# if ARCH_IA32 || ARCH_IA64 || ARCH_AMD64 || ARCH_ALPHA || ARCH_ARM || ARCH_AARCH64 || ARCH_MIPS || ARCH_E2K || ARCH_PPC64 || defined(__LITTLE_ENDIAN__)
 #  define BYTE_ORDER LITTLE_ENDIAN
 # else
 #  define BYTE_ORDER BIG_ENDIAN
--- source/ps/GameSetup/HWDetect.cpp.orig	2021-02-28 18:09:30.331118437 +0100
+++ source/ps/GameSetup/HWDetect.cpp	2021-02-28 18:09:52.209822367 +0100
@@ -124,6 +124,7 @@
 	scriptInterface.SetProperty(settings, "arch_arm", ARCH_ARM);
 	scriptInterface.SetProperty(settings, "arch_aarch64", ARCH_AARCH64);
 	scriptInterface.SetProperty(settings, "arch_e2k", ARCH_E2K);
+	scriptInterface.SetProperty(settings, "arch_ppc64", ARCH_PPC64);
 
 #ifdef NDEBUG
 	scriptInterface.SetProperty(settings, "build_debug", 0);
--- source/lib/sysdep/arch.h.orig	2021-02-28 18:45:28.761727174 +0100
+++ source/lib/sysdep/arch.h	2021-02-28 18:46:03.270251202 +0100
@@ -76,9 +76,15 @@
 #else
 # define ARCH_E2K 0
 #endif
+// .. PowerPC64 (PPC64)
+#if defined(__PPC64__)
+# define ARCH_PPC64 1
+#else
+# define ARCH_PPC64 0
+#endif
 
 // ensure exactly one architecture has been detected
-#if (ARCH_IA32+ARCH_IA64+ARCH_AMD64+ARCH_ALPHA+ARCH_ARM+ARCH_AARCH64+ARCH_MIPS+ARCH_E2K) != 1
+#if (ARCH_IA32+ARCH_IA64+ARCH_AMD64+ARCH_ALPHA+ARCH_ARM+ARCH_AARCH64+ARCH_MIPS+ARCH_E2K+ARCH_PPC64) != 1
 # error "architecture not correctly detected (either none or multiple ARCH_* defined)"
 #endif
 
--- libraries/source/nvtt/src/src/nvmath/SimdVector_VE.h
+++ libraries/source/nvtt/src/src/nvmath/SimdVector_VE.h
@@ -27,10 +27,7 @@
 #ifndef NV_SIMD_VECTOR_VE_H
 #define NV_SIMD_VECTOR_VE_H
 
-#ifndef __APPLE_ALTIVEC__
 #include <altivec.h>
-#undef bool
-#endif
 
 namespace nv {
 
diff --git a/source/nvtt/src/src/nvtt/squish/simd_ve.h b/source/nvtt/src/src/nvtt/squish/simd_ve.h
index 5a11858..e256c54 100644
--- libraries/source/nvtt/src/src/nvtt/squish/simd_ve.h
+++ libraries/source/nvtt/src/src/nvtt/squish/simd_ve.h
@@ -27,10 +27,7 @@
 #ifndef SQUISH_SIMD_VE_H
 #define SQUISH_SIMD_VE_H
 
-#ifndef __APPLE_ALTIVEC__
 #include <altivec.h>
-#undef bool
-#endif
 
 namespace nvsquish {