Artifact 069968302ad03620af1ef8e3717214ac9fc9ca5f761cb10c848543a2fa7b3ff8:
- File
src/runtime/lookup-asm/lookup-asm-x86_64-win64.S
— part of check-in
[943cf97843]
at
2020-07-04 00:24:54
on branch tagged-pointers
— Only use 4 bits to classify tagged pointers
This leaves 28/60 bits for the value. (user: js, size: 1904) [annotate] [blame] [check-ins using]
/* * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, * 2018, 2019, 2020 * Jonathan Schleifer <js@nil.im> * * 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" .intel_syntax noprefix .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 \name: test rcx, rcx jz short ret_nil bt ecx, 0 jc short .Ltagged_pointer_\name mov r8, [rcx] mov r8, [r8+56] .Lmain_\name: mov r10, rcx mov r11, rdx mov rax, [rdx] movzx ecx, ah movzx edx, al #ifdef OF_SELUID24 shr eax, 16 mov r8, [r8+rax*8] #endif mov r8, [r8+rcx*8] mov rax, [r8+rdx*8] test rax, rax jz short 0f ret 0: mov rcx, r10 mov rdx, r11 jmp \not_found .Ltagged_pointer_\name: and cl, 0xF shr cl, 1 movzx r8, cl mov rax, offset objc_tagged_pointer_classes mov r8, [rax+r8*8] mov r8, [r8+56] jmp short .Lmain_\name .endm .macro generate_lookup_super name lookup \name: mov r8, rcx mov rcx, [rcx] test rcx, rcx jz short ret_nil mov r8, [r8+8] mov r8, [r8+56] jmp short .Lmain_\lookup .endm generate_lookup objc_msg_lookup objc_method_not_found generate_lookup objc_msg_lookup_stret objc_method_not_found_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: mov rax, offset nil_method ret nil_method: xor rax, rax ret