ObjFW  Check-in [301fee913d]

Overview
Comment:Add PPC/ELF assembly lookup implementation.
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SHA3-256: 301fee913d5b55f8df7a8462c3b704a5fdf0de41e4f93923c1dcda43cf23cc2d
User & Date: js on 2012-07-18 23:55:15
Other Links: manifest | tags
Context
2012-07-19
01:45
Add exception handling for ARM. check-in: e47640dd96 user: js tags: trunk
2012-07-18
23:55
Add PPC/ELF assembly lookup implementation. check-in: 301fee913d user: js tags: trunk
15:30
PLATFORMS.md: Add Linux/PPC. check-in: a204475fb5 user: js tags: trunk
Changes

Modified configure.ac from [4b2a3dbd4a] to [f68f9de071].

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			# ifdef __ELF__
			yes
			# endif
			#endif
		], [
			AC_SUBST(LOOKUP_S, lookup-amd64-elf.S)
			AC_DEFINE(OF_ASM_LOOKUP, 1,
				[Whether to use lookup in assembly])
		], [
			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])
			])
		])

		AC_EGREP_CPP(yes, [
			#if defined(__amd64__) && defined(__MACH__)

			yes

			#endif
		], [
			AC_SUBST(LOOKUP_S, lookup-amd64-macho.S)
			AC_DEFINE(OF_ASM_LOOKUP, 1,
				[Whether to use lookup in assembly])












		])

		AS_IF([test x"$enable_seluid16" = x"yes"], [
			AC_DEFINE(OF_SELUID16, 1,
				[Whether to use 16 bit selector UIDs])
		])
		;;







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			# ifdef __ELF__
			yes
			# endif
			#endif
		], [
			AC_SUBST(LOOKUP_S, lookup-amd64-elf.S)
			AC_DEFINE(OF_ASM_LOOKUP, 1,
				[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 assembly for lookup])
			])
		])

		AC_EGREP_CPP(yes, [
			#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 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 version [a61daa3c61].



































































































































































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/*
 * 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