ObjFW  lookup-asm-ppc-elf.S at [0320eee453]

File src/runtime/lookup-asm/lookup-asm-ppc-elf.S artifact 43dfa59b3f part of check-in 0320eee453


/*
 * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013
 *   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_stret
.globl objc_msg_lookup_super
.globl objc_msg_lookup_super_stret

.section .text
.macro generate_lookup name not_found_handler
\name:
	cmpwi	%r3, 0
	beq-	ret_nil

	lwz	%r5, 0(%r3)
	lwz	%r5, 32(%r5)

.main_\name:
#ifdef OF_SELUID24
	lbz	%r6, 1(%r4)
#endif
	lbz	%r7, 2(%r4)
	lbz	%r8, 3(%r4)

#ifdef OF_SELUID24
	slwi	%r6, %r6, 2
#endif
	slwi	%r7, %r7, 2
	slwi	%r8, %r8, 2

#ifdef OF_SELUID24
	lwzx	%r5, %r5, %r6
#endif
	lwzx	%r5, %r5, %r7
	lwzx	%r5, %r5, %r8

	cmpwi	%r5, 0
	beq-	.forward_\name

	mr	%r3, %r5
	blr

.forward_\name:
	b	\not_found_handler@plt
.type \name, %function
.size \name, .-\name
.endm

.macro generate_lookup_super name lookup
\name:
	lwz	%r5, 0(%r3)
	cmpwi	%r5, 0
	beq-	ret_nil

	lwz	%r5, 4(%r3)
	lwz	%r5, 32(%r5)

	b	.main_\lookup
.type \name, %function
.size \name, .-\name
.endm

generate_lookup objc_msg_lookup objc_not_found_handler
generate_lookup objc_msg_lookup_stret objc_not_found_handler_stret
generate_lookup_super objc_msg_lookup_super objc_msg_lookup
generate_lookup_super objc_msg_lookup_super_stret objc_msg_lookup_stret

ret_nil:
	mflr	%r0
	bl	get_pc
	mtlr	%r0
.L0:
	addi	%r3, %r3, nil_method-.L0
	blr

nil_method:
	li	%r3, 0
	blr

get_pc:
	mflr	%r3
	blr

#ifdef __linux__
.section .note.GNU-stack, "", %progbits
#endif