Java example source code file (bsd_x86_64.s)
The bsd_x86_64.s Java example source code
#
# Copyright (c) 2004, 2013, Oracle and/or its affiliates. All rights reserved.
# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
#
# This code is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License version 2 only, as
# published by the Free Software Foundation.
#
# This code is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
# version 2 for more details (a copy is included in the LICENSE file that
# accompanied this code).
#
# You should have received a copy of the GNU General Public License version
# 2 along with this work; if not, write to the Free Software Foundation,
# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
#
# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
# or visit www.oracle.com if you need additional information or have any
# questions.
#
#ifdef __APPLE__
# Darwin uses _ prefixed global symbols
#define SYMBOL(s) _ ## s
#define ELF_TYPE(name, description)
#else
#define SYMBOL(s) s
#define ELF_TYPE(name, description) .type name,description
#endif
# NOTE WELL! The _Copy functions are called directly
# from server-compiler-generated code via CallLeafNoFP,
# which means that they *must* either not use floating
# point or use it in the same manner as does the server
# compiler.
.globl SYMBOL(_Copy_arrayof_conjoint_bytes)
.globl SYMBOL(_Copy_arrayof_conjoint_jshorts)
.globl SYMBOL(_Copy_conjoint_jshorts_atomic)
.globl SYMBOL(_Copy_arrayof_conjoint_jints)
.globl SYMBOL(_Copy_conjoint_jints_atomic)
.globl SYMBOL(_Copy_arrayof_conjoint_jlongs)
.globl SYMBOL(_Copy_conjoint_jlongs_atomic)
.text
.globl SYMBOL(SpinPause)
.p2align 4,,15
ELF_TYPE(SpinPause,@function)
SYMBOL(SpinPause):
rep
nop
movq $1, %rax
ret
# Support for void Copy::arrayof_conjoint_bytes(void* from,
# void* to,
# size_t count)
# rdi - from
# rsi - to
# rdx - count, treated as ssize_t
#
.p2align 4,,15
ELF_TYPE(_Copy_arrayof_conjoint_bytes,@function)
SYMBOL(_Copy_arrayof_conjoint_bytes):
movq %rdx,%r8 # byte count
shrq $3,%rdx # qword count
cmpq %rdi,%rsi
leaq -1(%rdi,%r8,1),%rax # from + bcount*1 - 1
jbe acb_CopyRight
cmpq %rax,%rsi
jbe acb_CopyLeft
acb_CopyRight:
leaq -8(%rdi,%rdx,8),%rax # from + qcount*8 - 8
leaq -8(%rsi,%rdx,8),%rcx # to + qcount*8 - 8
negq %rdx
jmp 7f
.p2align 4,,15
1: movq 8(%rax,%rdx,8),%rsi
movq %rsi,8(%rcx,%rdx,8)
addq $1,%rdx
jnz 1b
2: testq $4,%r8 # check for trailing dword
jz 3f
movl 8(%rax),%esi # copy trailing dword
movl %esi,8(%rcx)
addq $4,%rax
addq $4,%rcx # original %rsi is trashed, so we
# can't use it as a base register
3: testq $2,%r8 # check for trailing word
jz 4f
movw 8(%rax),%si # copy trailing word
movw %si,8(%rcx)
addq $2,%rcx
4: testq $1,%r8 # check for trailing byte
jz 5f
movb -1(%rdi,%r8,1),%al # copy trailing byte
movb %al,8(%rcx)
5: ret
.p2align 4,,15
6: movq -24(%rax,%rdx,8),%rsi
movq %rsi,-24(%rcx,%rdx,8)
movq -16(%rax,%rdx,8),%rsi
movq %rsi,-16(%rcx,%rdx,8)
movq -8(%rax,%rdx,8),%rsi
movq %rsi,-8(%rcx,%rdx,8)
movq (%rax,%rdx,8),%rsi
movq %rsi,(%rcx,%rdx,8)
7: addq $4,%rdx
jle 6b
subq $4,%rdx
jl 1b
jmp 2b
acb_CopyLeft:
testq $1,%r8 # check for trailing byte
jz 1f
movb -1(%rdi,%r8,1),%cl # copy trailing byte
movb %cl,-1(%rsi,%r8,1)
subq $1,%r8 # adjust for possible trailing word
1: testq $2,%r8 # check for trailing word
jz 2f
movw -2(%rdi,%r8,1),%cx # copy trailing word
movw %cx,-2(%rsi,%r8,1)
2: testq $4,%r8 # check for trailing dword
jz 5f
movl (%rdi,%rdx,8),%ecx # copy trailing dword
movl %ecx,(%rsi,%rdx,8)
jmp 5f
.p2align 4,,15
3: movq -8(%rdi,%rdx,8),%rcx
movq %rcx,-8(%rsi,%rdx,8)
subq $1,%rdx
jnz 3b
ret
.p2align 4,,15
4: movq 24(%rdi,%rdx,8),%rcx
movq %rcx,24(%rsi,%rdx,8)
movq 16(%rdi,%rdx,8),%rcx
movq %rcx,16(%rsi,%rdx,8)
movq 8(%rdi,%rdx,8),%rcx
movq %rcx,8(%rsi,%rdx,8)
movq (%rdi,%rdx,8),%rcx
movq %rcx,(%rsi,%rdx,8)
5: subq $4,%rdx
jge 4b
addq $4,%rdx
jg 3b
ret
# Support for void Copy::arrayof_conjoint_jshorts(void* from,
# void* to,
# size_t count)
# Equivalent to
# conjoint_jshorts_atomic
#
# If 'from' and/or 'to' are aligned on 4- or 2-byte boundaries, we
# let the hardware handle it. The tow or four words within dwords
# or qwords that span cache line boundaries will still be loaded
# and stored atomically.
#
# rdi - from
# rsi - to
# rdx - count, treated as ssize_t
#
.p2align 4,,15
ELF_TYPE(_Copy_arrayof_conjoint_jshorts,@function)
ELF_TYPE(_Copy_conjoint_jshorts_atomic,@function)
SYMBOL(_Copy_arrayof_conjoint_jshorts):
SYMBOL(_Copy_conjoint_jshorts_atomic):
movq %rdx,%r8 # word count
shrq $2,%rdx # qword count
cmpq %rdi,%rsi
leaq -2(%rdi,%r8,2),%rax # from + wcount*2 - 2
jbe acs_CopyRight
cmpq %rax,%rsi
jbe acs_CopyLeft
acs_CopyRight:
leaq -8(%rdi,%rdx,8),%rax # from + qcount*8 - 8
leaq -8(%rsi,%rdx,8),%rcx # to + qcount*8 - 8
negq %rdx
jmp 6f
1: movq 8(%rax,%rdx,8),%rsi
movq %rsi,8(%rcx,%rdx,8)
addq $1,%rdx
jnz 1b
2: testq $2,%r8 # check for trailing dword
jz 3f
movl 8(%rax),%esi # copy trailing dword
movl %esi,8(%rcx)
addq $4,%rcx # original %rsi is trashed, so we
# can't use it as a base register
3: testq $1,%r8 # check for trailing word
jz 4f
movw -2(%rdi,%r8,2),%si # copy trailing word
movw %si,8(%rcx)
4: ret
.p2align 4,,15
5: movq -24(%rax,%rdx,8),%rsi
movq %rsi,-24(%rcx,%rdx,8)
movq -16(%rax,%rdx,8),%rsi
movq %rsi,-16(%rcx,%rdx,8)
movq -8(%rax,%rdx,8),%rsi
movq %rsi,-8(%rcx,%rdx,8)
movq (%rax,%rdx,8),%rsi
movq %rsi,(%rcx,%rdx,8)
6: addq $4,%rdx
jle 5b
subq $4,%rdx
jl 1b
jmp 2b
acs_CopyLeft:
testq $1,%r8 # check for trailing word
jz 1f
movw -2(%rdi,%r8,2),%cx # copy trailing word
movw %cx,-2(%rsi,%r8,2)
1: testq $2,%r8 # check for trailing dword
jz 4f
movl (%rdi,%rdx,8),%ecx # copy trailing dword
movl %ecx,(%rsi,%rdx,8)
jmp 4f
2: movq -8(%rdi,%rdx,8),%rcx
movq %rcx,-8(%rsi,%rdx,8)
subq $1,%rdx
jnz 2b
ret
.p2align 4,,15
3: movq 24(%rdi,%rdx,8),%rcx
movq %rcx,24(%rsi,%rdx,8)
movq 16(%rdi,%rdx,8),%rcx
movq %rcx,16(%rsi,%rdx,8)
movq 8(%rdi,%rdx,8),%rcx
movq %rcx,8(%rsi,%rdx,8)
movq (%rdi,%rdx,8),%rcx
movq %rcx,(%rsi,%rdx,8)
4: subq $4,%rdx
jge 3b
addq $4,%rdx
jg 2b
ret
# Support for void Copy::arrayof_conjoint_jints(jint* from,
# jint* to,
# size_t count)
# Equivalent to
# conjoint_jints_atomic
#
# If 'from' and/or 'to' are aligned on 4-byte boundaries, we let
# the hardware handle it. The two dwords within qwords that span
# cache line boundaries will still be loaded and stored atomically.
#
# rdi - from
# rsi - to
# rdx - count, treated as ssize_t
#
.p2align 4,,15
ELF_TYPE(_Copy_arrayof_conjoint_jints,@function)
ELF_TYPE(_Copy_conjoint_jints_atomic,@function)
SYMBOL(_Copy_arrayof_conjoint_jints):
SYMBOL(_Copy_conjoint_jints_atomic):
movq %rdx,%r8 # dword count
shrq %rdx # qword count
cmpq %rdi,%rsi
leaq -4(%rdi,%r8,4),%rax # from + dcount*4 - 4
jbe aci_CopyRight
cmpq %rax,%rsi
jbe aci_CopyLeft
aci_CopyRight:
leaq -8(%rdi,%rdx,8),%rax # from + qcount*8 - 8
leaq -8(%rsi,%rdx,8),%rcx # to + qcount*8 - 8
negq %rdx
jmp 5f
.p2align 4,,15
1: movq 8(%rax,%rdx,8),%rsi
movq %rsi,8(%rcx,%rdx,8)
addq $1,%rdx
jnz 1b
2: testq $1,%r8 # check for trailing dword
jz 3f
movl 8(%rax),%esi # copy trailing dword
movl %esi,8(%rcx)
3: ret
.p2align 4,,15
4: movq -24(%rax,%rdx,8),%rsi
movq %rsi,-24(%rcx,%rdx,8)
movq -16(%rax,%rdx,8),%rsi
movq %rsi,-16(%rcx,%rdx,8)
movq -8(%rax,%rdx,8),%rsi
movq %rsi,-8(%rcx,%rdx,8)
movq (%rax,%rdx,8),%rsi
movq %rsi,(%rcx,%rdx,8)
5: addq $4,%rdx
jle 4b
subq $4,%rdx
jl 1b
jmp 2b
aci_CopyLeft:
testq $1,%r8 # check for trailing dword
jz 3f
movl -4(%rdi,%r8,4),%ecx # copy trailing dword
movl %ecx,-4(%rsi,%r8,4)
jmp 3f
1: movq -8(%rdi,%rdx,8),%rcx
movq %rcx,-8(%rsi,%rdx,8)
subq $1,%rdx
jnz 1b
ret
.p2align 4,,15
2: movq 24(%rdi,%rdx,8),%rcx
movq %rcx,24(%rsi,%rdx,8)
movq 16(%rdi,%rdx,8),%rcx
movq %rcx,16(%rsi,%rdx,8)
movq 8(%rdi,%rdx,8),%rcx
movq %rcx,8(%rsi,%rdx,8)
movq (%rdi,%rdx,8),%rcx
movq %rcx,(%rsi,%rdx,8)
3: subq $4,%rdx
jge 2b
addq $4,%rdx
jg 1b
ret
# Support for void Copy::arrayof_conjoint_jlongs(jlong* from,
# jlong* to,
# size_t count)
# Equivalent to
# conjoint_jlongs_atomic
# arrayof_conjoint_oops
# conjoint_oops_atomic
#
# rdi - from
# rsi - to
# rdx - count, treated as ssize_t
#
.p2align 4,,15
ELF_TYPE(_Copy_arrayof_conjoint_jlongs,@function)
ELF_TYPE(_Copy_conjoint_jlongs_atomic,@function)
SYMBOL(_Copy_arrayof_conjoint_jlongs):
SYMBOL(_Copy_conjoint_jlongs_atomic):
cmpq %rdi,%rsi
leaq -8(%rdi,%rdx,8),%rax # from + count*8 - 8
jbe acl_CopyRight
cmpq %rax,%rsi
jbe acl_CopyLeft
acl_CopyRight:
leaq -8(%rsi,%rdx,8),%rcx # to + count*8 - 8
negq %rdx
jmp 3f
1: movq 8(%rax,%rdx,8),%rsi
movq %rsi,8(%rcx,%rdx,8)
addq $1,%rdx
jnz 1b
ret
.p2align 4,,15
2: movq -24(%rax,%rdx,8),%rsi
movq %rsi,-24(%rcx,%rdx,8)
movq -16(%rax,%rdx,8),%rsi
movq %rsi,-16(%rcx,%rdx,8)
movq -8(%rax,%rdx,8),%rsi
movq %rsi,-8(%rcx,%rdx,8)
movq (%rax,%rdx,8),%rsi
movq %rsi,(%rcx,%rdx,8)
3: addq $4,%rdx
jle 2b
subq $4,%rdx
jl 1b
ret
4: movq -8(%rdi,%rdx,8),%rcx
movq %rcx,-8(%rsi,%rdx,8)
subq $1,%rdx
jnz 4b
ret
.p2align 4,,15
5: movq 24(%rdi,%rdx,8),%rcx
movq %rcx,24(%rsi,%rdx,8)
movq 16(%rdi,%rdx,8),%rcx
movq %rcx,16(%rsi,%rdx,8)
movq 8(%rdi,%rdx,8),%rcx
movq %rcx,8(%rsi,%rdx,8)
movq (%rdi,%rdx,8),%rcx
movq %rcx,(%rsi,%rdx,8)
acl_CopyLeft:
subq $4,%rdx
jge 5b
addq $4,%rdx
jg 4b
ret
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