ObjFW  Check-in [965b8afeef]

Overview
Comment:Add ASM for AMD64/Mach-O.
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SHA3-256: 965b8afeefa6355cb9ceb38bf0df3e63375154dffac53b24ed60252fa2b4253c
User & Date: js on 2012-05-12 10:22:47
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Context
2012-05-12
14:14
Use -Wno-deprecated-objc-isa-usage if available. check-in: 482c103268 user: js tags: runtime
10:22
Add ASM for AMD64/Mach-O. check-in: 965b8afeef user: js tags: runtime
2012-05-10
18:38
Sequential selectors to reduce fragmentation. check-in: 3f0b9df793 user: js tags: runtime
Changes
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Modified configure.ac from [a12f19a3e6] to [6d931bb351].

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				#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])
		])
		;;
	"Apple runtime")
︙

Added src/runtime/lookup-amd64-macho.S version [09cb0dc88d]. 




































































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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, __text, regular, pure_instructions
_objc_msg_lookup:
	testq	%rdi, %rdi
	jz	ret_nil

	movq	(%rdi), %r8
	movq	64(%r8), %r8

lookup:
	movq	(%rsi), %rax
	movzbl	%ah, %ecx
	movzbl	%al, %edx
#ifndef OF_SELUID16
	shrl	$16, %eax

	movq	(%r8,%rax,8), %r8
#endif
	movq	(%r8,%rcx,8), %r8
	movq	(%r8,%rdx,8), %rax

	testq	%rax, %rax
	jz	forward

	ret

forward:
	jmp	_objc_not_found_handler

_objc_msg_lookup_super:
	movq	(%rdi), %rax
	testq	%rax, %rax
	jz	ret_nil

	movq	8(%rdi), %r8
	movq	64(%r8), %r8
	movq	%rdi, %rax
	jmp	lookup

ret_nil:
	leaq	nil_method(%rip), %rax
	ret

nil_method:
	movq	%rdi, %rax
	ret