Index: configure.ac
==================================================================
--- configure.ac
+++ configure.ac
@@ -238,31 +238,45 @@
 			# endif
 			#endif
 		], [
 			AC_SUBST(LOOKUP_S, lookup-amd64-elf.S)
 			AC_DEFINE(OF_ASM_LOOKUP, 1,
-				[Whether to use lookup in assembly])
+				[Whether to use assembly for lookup])
 		], [
 			AC_EGREP_CPP(yes, [
 				#if defined(__i386__) && defined(__ELF__)
 				yes
 				#endif
 			], [
 				AC_SUBST(LOOKUP_S, lookup-x86-elf.S)
 				AC_DEFINE(OF_ASM_LOOKUP, 1,
-					[Whether to use lookup in assembly])
+					[Whether to use assembly for lookup])
 			])
 		])
 
 		AC_EGREP_CPP(yes, [
-			#if defined(__amd64__) && defined(__MACH__)
+			#if defined(__amd64__) || defined(__x86_64__)
+			# ifdef __MACH__
 			yes
+			# endif
 			#endif
 		], [
 			AC_SUBST(LOOKUP_S, lookup-amd64-macho.S)
 			AC_DEFINE(OF_ASM_LOOKUP, 1,
-				[Whether to use lookup in assembly])
+				[Whether to use assembly for lookup])
+		])
+
+		AC_EGREP_CPP(yes, [
+			#if defined(__ppc__) || defined(__PPC__)
+			# ifdef __ELF__
+			yes
+			# endif
+			#endif
+		], [
+			AC_SUBST(LOOKUP_S, lookup-ppc-elf.S)
+			AC_DEFINE(OF_ASM_LOOKUP, 1,
+				[Whether to use assembly for lookup])
 		])
 
 		AS_IF([test x"$enable_seluid16" = x"yes"], [
 			AC_DEFINE(OF_SELUID16, 1,
 				[Whether to use 16 bit selector UIDs])

ADDED   src/runtime/lookup-ppc-elf.S
Index: src/runtime/lookup-ppc-elf.S
==================================================================
--- src/runtime/lookup-ppc-elf.S
+++ src/runtime/lookup-ppc-elf.S
@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2008, 2009, 2010, 2011, 2012
+ *   Jonathan Schleifer <js@webkeks.org>
+ *
+ * All rights reserved.
+ *
+ * This file is part of ObjFW. It may be distributed under the terms of the
+ * Q Public License 1.0, which can be found in the file LICENSE.QPL included in
+ * the packaging of this file.
+ *
+ * Alternatively, it may be distributed under the terms of the GNU General
+ * Public License, either version 2 or 3, which can be found in the file
+ * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
+ * file.
+ */
+
+#include "config.h"
+
+.globl objc_msg_lookup
+.globl objc_msg_lookup_super
+
+.section .text
+objc_msg_lookup:
+	cmpwi	%r3, 0
+	beq	ret_nil
+
+	lwz	%r5, 0(%r3)
+	lwz	%r5, 32(%r5)
+
+lookup:
+	lbz	%r6, 1(%r4)
+	lbz	%r7, 2(%r4)
+	lbz	%r8, 3(%r4)
+
+	slwi	%r6, %r6, 2
+	slwi	%r7, %r7, 2
+	slwi	%r8, %r8, 2
+
+	lwzx	%r5, %r5, %r6
+	lwzx	%r5, %r5, %r7
+	lwzx	%r5, %r5, %r8
+
+	cmpwi	%r5, 0
+	beq	forward
+
+	mr	%r3, %r5
+	blr
+
+forward:
+	b	objc_not_found_handler@plt
+
+objc_msg_lookup_super:
+	lwz	%r5, 0(%r3)
+	cmpwi	%r5, 0
+	beq	ret_nil
+
+	lwz	%r5, 4(%r3)
+	lwz	%r5, 32(%r5)
+
+	b	lookup
+
+ret_nil:
+	mflr	%r0
+	bl	get_pc
+	mtlr	%r0
+.L1:
+	addi	%r3, %r3, nil_method-.L1
+	blr
+
+nil_method:
+	li	%r3, 0
+	blr
+
+get_pc:
+	mflr	%r3
+	blr
+
+.type objc_msg_lookup, @function
+.type objc_msg_lookup_super, @function
+.size objc_msg_lookup, forward-objc_msg_lookup
+.size objc_msg_lookup_super, ret_nil-objc_msg_lookup_super