JDK14/Java14源码在线阅读
#
# Copyright (c) 2008, 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.
#
# 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 _Copy_conjoint_bytes
.type _Copy_conjoint_bytes, %function
.globl _Copy_arrayof_conjoint_bytes
.type _Copy_arrayof_conjoint_bytes, %function
.globl _Copy_disjoint_words
.type _Copy_disjoint_words, %function
.globl _Copy_conjoint_words
.type _Copy_conjoint_words, %function
.globl _Copy_conjoint_jshorts_atomic
.type _Copy_conjoint_jshorts_atomic, %function
.globl _Copy_arrayof_conjoint_jshorts
.type _Copy_arrayof_conjoint_jshorts, %function
.globl _Copy_conjoint_jints_atomic
.type _Copy_conjoint_jints_atomic, %function
.globl _Copy_arrayof_conjoint_jints
.type _Copy_arrayof_conjoint_jints, %function
.globl _Copy_conjoint_jlongs_atomic
.type _Copy_conjoint_jlongs_atomic, %function
.globl _Copy_arrayof_conjoint_jlongs
.type _Copy_arrayof_conjoint_jlongs, %function
from .req r0
to .req r1
.text
.globl SpinPause
.type SpinPause, %function
SpinPause:
bx LR
# Support for void Copy::conjoint_bytes(void* from,
# void* to,
# size_t count)
_Copy_conjoint_bytes:
swi 0x9f0001
# Support for void Copy::arrayof_conjoint_bytes(void* from,
# void* to,
# size_t count)
_Copy_arrayof_conjoint_bytes:
swi 0x9f0001
# Support for void Copy::disjoint_words(void* from,
# void* to,
# size_t count)
_Copy_disjoint_words:
stmdb sp!, {r3 - r9, ip}
cmp r2, #0
beq disjoint_words_finish
pld [from, #0]
cmp r2, #12
ble disjoint_words_small
.align 3
dw_f2b_loop_32:
subs r2, #32
blt dw_f2b_loop_32_finish
ldmia from!, {r3 - r9, ip}
nop
pld [from]
stmia to!, {r3 - r9, ip}
bgt dw_f2b_loop_32
dw_f2b_loop_32_finish:
addlts r2, #32
beq disjoint_words_finish
cmp r2, #16
blt disjoint_words_small
ldmia from!, {r3 - r6}
subge r2, r2, #16
stmia to!, {r3 - r6}
beq disjoint_words_finish
disjoint_words_small:
cmp r2, #8
ldr r7, [from], #4
ldrge r8, [from], #4
ldrgt r9, [from], #4
str r7, [to], #4
strge r8, [to], #4
strgt r9, [to], #4
disjoint_words_finish:
ldmia sp!, {r3 - r9, ip}
bx lr
# Support for void Copy::conjoint_words(void* from,
# void* to,
# size_t count)
_Copy_conjoint_words:
stmdb sp!, {r3 - r9, ip}
cmp r2, #0
beq conjoint_words_finish
pld [from, #0]
cmp r2, #12
ble conjoint_words_small
subs r3, to, from
cmphi r2, r3
bhi cw_b2f_copy
.align 3
cw_f2b_loop_32:
subs r2, #32
blt cw_f2b_loop_32_finish
ldmia from!, {r3 - r9, ip}
nop
pld [from]
stmia to!, {r3 - r9, ip}
bgt cw_f2b_loop_32
cw_f2b_loop_32_finish:
addlts r2, #32
beq conjoint_words_finish
cmp r2, #16
blt conjoint_words_small
ldmia from!, {r3 - r6}
subge r2, r2, #16
stmia to!, {r3 - r6}
beq conjoint_words_finish
conjoint_words_small:
cmp r2, #8
ldr r7, [from], #4
ldrge r8, [from], #4
ldrgt r9, [from], #4
str r7, [to], #4
strge r8, [to], #4
strgt r9, [to], #4
b conjoint_words_finish
# Src and dest overlap, copy in a descending order
cw_b2f_copy:
add from, r2
pld [from, #-32]
add to, r2
.align 3
cw_b2f_loop_32:
subs r2, #32
blt cw_b2f_loop_32_finish
ldmdb from!, {r3-r9,ip}
nop
pld [from, #-32]
stmdb to!, {r3-r9,ip}
bgt cw_b2f_loop_32
cw_b2f_loop_32_finish:
addlts r2, #32
beq conjoint_words_finish
cmp r2, #16
blt cw_b2f_copy_small
ldmdb from!, {r3 - r6}
subge r2, r2, #16
stmdb to!, {r3 - r6}
beq conjoint_words_finish
cw_b2f_copy_small:
cmp r2, #8
ldr r7, [from, #-4]!
ldrge r8, [from, #-4]!
ldrgt r9, [from, #-4]!
str r7, [to, #-4]!
strge r8, [to, #-4]!
strgt r9, [to, #-4]!
conjoint_words_finish:
ldmia sp!, {r3 - r9, ip}
bx lr
# Support for void Copy::conjoint_jshorts_atomic(void* from,
# void* to,
# size_t count)
_Copy_conjoint_jshorts_atomic:
stmdb sp!, {r3 - r9, ip}
cmp r2, #0
beq conjoint_shorts_finish
subs r3, to, from
cmphi r2, r3
bhi cs_b2f_copy
pld [from]
ands r3, to, #3
bne cs_f2b_dest_u
ands r3, from, #3
bne cs_f2b_src_u
# Aligned source address
.align 3
cs_f2b_loop_32:
subs r2, #32
blt cs_f2b_loop_32_finish
ldmia from!, {r3 - r9, ip}
nop
pld [from]
stmia to!, {r3 - r9, ip}
bgt cs_f2b_loop_32
cs_f2b_loop_32_finish:
addlts r2, #32
beq conjoint_shorts_finish
movs r6, r2, lsr #3
.align 3
cs_f2b_8_loop:
beq cs_f2b_4
ldmia from!, {r4-r5}
subs r6, #1
stmia to!, {r4-r5}
bgt cs_f2b_8_loop
cs_f2b_4:
ands r2, #7
beq conjoint_shorts_finish
cmp r2, #4
ldrh r3, [from], #2
ldrgeh r4, [from], #2
ldrgth r5, [from], #2
strh r3, [to], #2
strgeh r4, [to], #2
strgth r5, [to], #2
b conjoint_shorts_finish
# Destination not aligned
cs_f2b_dest_u:
ldrh r3, [from], #2
subs r2, #2
strh r3, [to], #2
beq conjoint_shorts_finish
# Check to see if source is not aligned ether
ands r3, from, #3
beq cs_f2b_loop_32
cs_f2b_src_u:
cmp r2, #16
blt cs_f2b_8_u
# Load 2 first bytes to r7 and make src ptr word aligned
bic from, #3
ldr r7, [from], #4
# Destination aligned, source not
mov r8, r2, lsr #4
.align 3
cs_f2b_16_u_loop:
mov r3, r7, lsr #16
ldmia from!, {r4 - r7}
orr r3, r3, r4, lsl #16
mov r4, r4, lsr #16
pld [from]
orr r4, r4, r5, lsl #16
mov r5, r5, lsr #16
orr r5, r5, r6, lsl #16
mov r6, r6, lsr #16
orr r6, r6, r7, lsl #16
stmia to!, {r3 - r6}
subs r8, #1
bgt cs_f2b_16_u_loop
ands r2, #0xf
beq conjoint_shorts_finish
sub from, #2
cs_f2b_8_u:
cmp r2, #8
blt cs_f2b_4_u
ldrh r4, [from], #2
ldr r5, [from], #4
ldrh r6, [from], #2
orr r4, r4, r5, lsl #16
mov r5, r5, lsr #16
orr r5, r5, r6, lsl #16
subs r2, #8
stmia to!, {r4 - r5}
cs_f2b_4_u:
beq conjoint_shorts_finish
cmp r2, #4
ldrh r3, [from], #2
ldrgeh r4, [from], #2
ldrgth r5, [from], #2
strh r3, [to], #2
strgeh r4, [to], #2
strgth r5, [to], #2
b conjoint_shorts_finish
# Src and dest overlap, copy in a descending order
cs_b2f_copy:
add from, r2
pld [from, #-32]
add to, r2
ands r3, to, #3
bne cs_b2f_dest_u
ands r3, from, #3
bne cs_b2f_src_u
.align 3
cs_b2f_loop_32:
subs r2, #32
blt cs_b2f_loop_32_finish
ldmdb from!, {r3-r9,ip}
nop
pld [from, #-32]
stmdb to!, {r3-r9,ip}
bgt cs_b2f_loop_32
cs_b2f_loop_32_finish:
addlts r2, #32
beq conjoint_shorts_finish
cmp r2, #24
blt cs_b2f_16
ldmdb from!, {r3-r8}
sub r2, #24
stmdb to!, {r3-r8}
beq conjoint_shorts_finish
cs_b2f_16:
cmp r2, #16
blt cs_b2f_8
ldmdb from!, {r3-r6}
sub r2, #16
stmdb to!, {r3-r6}
beq conjoint_shorts_finish
cs_b2f_8:
cmp r2, #8
blt cs_b2f_all_copy
ldmdb from!, {r3-r4}
sub r2, #8
stmdb to!, {r3-r4}
beq conjoint_shorts_finish
cs_b2f_all_copy:
cmp r2, #4
ldrh r3, [from, #-2]!
ldrgeh r4, [from, #-2]!
ldrgth r5, [from, #-2]!
strh r3, [to, #-2]!
strgeh r4, [to, #-2]!
strgth r5, [to, #-2]!
b conjoint_shorts_finish
# Destination not aligned
cs_b2f_dest_u:
ldrh r3, [from, #-2]!
strh r3, [to, #-2]!
sub r2, #2
# Check source alignment as well
ands r3, from, #3
beq cs_b2f_loop_32
# Source not aligned
cs_b2f_src_u:
bic from, #3
.align 3
cs_b2f_16_loop_u:
subs r2, #16
blt cs_b2f_16_loop_u_finished
ldr r7, [from]
mov r3, r7
ldmdb from!, {r4 - r7}
mov r4, r4, lsr #16
orr r4, r4, r5, lsl #16
pld [from, #-32]
mov r5, r5, lsr #16
orr r5, r5, r6, lsl #16
mov r6, r6, lsr #16
orr r6, r6, r7, lsl #16
mov r7, r7, lsr #16
orr r7, r7, r3, lsl #16
stmdb to!, {r4 - r7}
bgt cs_b2f_16_loop_u
beq conjoint_shorts_finish
cs_b2f_16_loop_u_finished:
addlts r2, #16
ldr r3, [from]
cmp r2, #10
blt cs_b2f_2_u_loop
ldmdb from!, {r4 - r5}
mov r6, r4, lsr #16
orr r6, r6, r5, lsl #16
mov r7, r5, lsr #16
orr r7, r7, r3, lsl #16
stmdb to!, {r6-r7}
sub r2, #8
.align 3
cs_b2f_2_u_loop:
subs r2, #2
ldrh r3, [from], #-2
strh r3, [to, #-2]!
bgt cs_b2f_2_u_loop
conjoint_shorts_finish:
ldmia sp!, {r3 - r9, ip}
bx lr
# Support for void Copy::arrayof_conjoint_jshorts(void* from,
# void* to,
# size_t count)
_Copy_arrayof_conjoint_jshorts:
swi 0x9f0001
# Support for void Copy::conjoint_jints_atomic(void* from,
# void* to,
# size_t count)
_Copy_conjoint_jints_atomic:
_Copy_arrayof_conjoint_jints:
swi 0x9f0001
# Support for void Copy::conjoint_jlongs_atomic(jlong* from,
# jlong* to,
# size_t count)
_Copy_conjoint_jlongs_atomic:
_Copy_arrayof_conjoint_jlongs:
stmdb sp!, {r3 - r9, ip}
cmp r2, #0
beq conjoint_longs_finish
pld [from, #0]
cmp r2, #24
ble conjoint_longs_small
subs r3, to, from
cmphi r2, r3
bhi cl_b2f_copy
.align 3
cl_f2b_loop_32:
subs r2, #32
blt cl_f2b_loop_32_finish
ldmia from!, {r3 - r9, ip}
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