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1 #
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2 # Copyright (c) 2004, 2013, Oracle and/or its affiliates. All rights reserved.
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3 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 #
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5 # This code is free software; you can redistribute it and/or modify it
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6 # under the terms of the GNU General Public License version 2 only, as
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7 # published by the Free Software Foundation.
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8 #
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9 # This code is distributed in the hope that it will be useful, but WITHOUT
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10 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 # version 2 for more details (a copy is included in the LICENSE file that
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13 # accompanied this code).
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14 #
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15 # You should have received a copy of the GNU General Public License version
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16 # 2 along with this work; if not, write to the Free Software Foundation,
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17 # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 #
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19 # Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 # or visit www.oracle.com if you need additional information or have any
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21 # questions.
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22 #
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23
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24
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25 #ifdef __APPLE__
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26 # Darwin uses _ prefixed global symbols
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27 #define SYMBOL(s) _ ## s
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28 #define ELF_TYPE(name, description)
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29 #else
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30 #define SYMBOL(s) s
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31 #define ELF_TYPE(name, description) .type name,description
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32 #endif
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33
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34 .globl SYMBOL(fixcw)
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35
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36 # NOTE WELL! The _Copy functions are called directly
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37 # from server-compiler-generated code via CallLeafNoFP,
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38 # which means that they *must* either not use floating
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39 # point or use it in the same manner as does the server
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40 # compiler.
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41
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42 .globl SYMBOL(_Copy_conjoint_bytes)
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43 .globl SYMBOL(_Copy_arrayof_conjoint_bytes)
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44 .globl SYMBOL(_Copy_conjoint_jshorts_atomic)
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45 .globl SYMBOL(_Copy_arrayof_conjoint_jshorts)
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46 .globl SYMBOL(_Copy_conjoint_jints_atomic)
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47 .globl SYMBOL(_Copy_arrayof_conjoint_jints)
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48 .globl SYMBOL(_Copy_conjoint_jlongs_atomic)
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49 .globl SYMBOL(_mmx_Copy_arrayof_conjoint_jshorts)
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50
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51 .globl SYMBOL(_Atomic_cmpxchg_long)
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52 .globl SYMBOL(_Atomic_move_long)
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53
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54 .text
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55
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56 # Support for void os::Solaris::init_thread_fpu_state() in os_solaris_i486.cpp
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57 # Set fpu to 53 bit precision. This happens too early to use a stub.
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58 # ported from solaris_x86_32.s
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59 .p2align 4,,15
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60 SYMBOL(fixcw):
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61 pushl $0x27f
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62 fldcw 0(%esp)
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63 popl %eax
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64 ret
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65
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66 .globl SYMBOL(SpinPause)
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67 ELF_TYPE(SpinPause,@function)
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68 .p2align 4,,15
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69 SYMBOL(SpinPause):
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70 rep
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71 nop
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72 movl $1, %eax
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73 ret
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74
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75 # Support for void Copy::conjoint_bytes(void* from,
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76 # void* to,
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77 # size_t count)
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78 .p2align 4,,15
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79 ELF_TYPE(_Copy_conjoint_bytes,@function)
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80 SYMBOL(_Copy_conjoint_bytes):
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81 pushl %esi
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82 movl 4+12(%esp),%ecx # count
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83 pushl %edi
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84 movl 8+ 4(%esp),%esi # from
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85 movl 8+ 8(%esp),%edi # to
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86 cmpl %esi,%edi
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87 leal -1(%esi,%ecx),%eax # from + count - 1
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88 jbe cb_CopyRight
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89 cmpl %eax,%edi
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90 jbe cb_CopyLeft
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91 # copy from low to high
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92 cb_CopyRight:
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93 cmpl $3,%ecx
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94 jbe 5f # <= 3 bytes
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95 # align source address at dword address boundary
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96 movl %ecx,%eax # original count
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97 movl $4,%ecx
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98 subl %esi,%ecx
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99 andl $3,%ecx # prefix byte count
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100 jz 1f # no prefix
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101 subl %ecx,%eax # byte count less prefix
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102 # copy prefix
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103 subl %esi,%edi
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104 0: movb (%esi),%dl
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105 movb %dl,(%edi,%esi,1)
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106 addl $1,%esi
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107 subl $1,%ecx
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108 jnz 0b
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109 addl %esi,%edi
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110 1: movl %eax,%ecx # byte count less prefix
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111 shrl $2,%ecx # dword count
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112 jz 4f # no dwords to move
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113 cmpl $32,%ecx
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114 jbe 2f # <= 32 dwords
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115 # copy aligned dwords
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116 rep; smovl
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117 jmp 4f
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118 # copy aligned dwords
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119 2: subl %esi,%edi
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120 .p2align 4,,15
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121 3: movl (%esi),%edx
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122 movl %edx,(%edi,%esi,1)
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123 addl $4,%esi
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124 subl $1,%ecx
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125 jnz 3b
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126 addl %esi,%edi
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127 4: movl %eax,%ecx # byte count less prefix
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128 5: andl $3,%ecx # suffix byte count
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129 jz 7f # no suffix
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130 # copy suffix
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131 xorl %eax,%eax
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132 6: movb (%esi,%eax,1),%dl
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133 movb %dl,(%edi,%eax,1)
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134 addl $1,%eax
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135 subl $1,%ecx
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136 jnz 6b
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137 7: popl %edi
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138 popl %esi
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139 ret
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140 # copy from high to low
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141 cb_CopyLeft:
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142 std
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143 leal -4(%edi,%ecx),%edi # to + count - 4
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144 movl %eax,%esi # from + count - 1
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145 movl %ecx,%eax
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146 subl $3,%esi # from + count - 4
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147 cmpl $3,%ecx
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148 jbe 5f # <= 3 bytes
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149 1: shrl $2,%ecx # dword count
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150 jz 4f # no dwords to move
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151 cmpl $32,%ecx
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152 ja 3f # > 32 dwords
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153 # copy dwords, aligned or not
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154 subl %esi,%edi
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155 .p2align 4,,15
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156 2: movl (%esi),%edx
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157 movl %edx,(%edi,%esi,1)
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158 subl $4,%esi
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159 subl $1,%ecx
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160 jnz 2b
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161 addl %esi,%edi
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162 jmp 4f
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163 # copy dwords, aligned or not
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164 3: rep; smovl
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165 4: movl %eax,%ecx # byte count
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166 5: andl $3,%ecx # suffix byte count
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167 jz 7f # no suffix
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168 # copy suffix
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169 subl %esi,%edi
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170 addl $3,%esi
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171 6: movb (%esi),%dl
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172 movb %dl,(%edi,%esi,1)
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173 subl $1,%esi
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174 subl $1,%ecx
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175 jnz 6b
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176 7: cld
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177 popl %edi
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178 popl %esi
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179 ret
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180
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181 # Support for void Copy::arrayof_conjoint_bytes(void* from,
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182 # void* to,
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183 # size_t count)
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184 #
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185 # Same as _Copy_conjoint_bytes, except no source alignment check.
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186 .p2align 4,,15
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187 ELF_TYPE(_Copy_arrayof_conjoint_bytes,@function)
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188 SYMBOL(_Copy_arrayof_conjoint_bytes):
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189 pushl %esi
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190 movl 4+12(%esp),%ecx # count
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191 pushl %edi
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192 movl 8+ 4(%esp),%esi # from
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193 movl 8+ 8(%esp),%edi # to
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194 cmpl %esi,%edi
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195 leal -1(%esi,%ecx),%eax # from + count - 1
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196 jbe acb_CopyRight
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197 cmpl %eax,%edi
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198 jbe acb_CopyLeft
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199 # copy from low to high
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200 acb_CopyRight:
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201 cmpl $3,%ecx
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202 jbe 5f
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203 1: movl %ecx,%eax
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204 shrl $2,%ecx
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205 jz 4f
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206 cmpl $32,%ecx
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207 ja 3f
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208 # copy aligned dwords
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209 subl %esi,%edi
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210 .p2align 4,,15
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211 2: movl (%esi),%edx
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212 movl %edx,(%edi,%esi,1)
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213 addl $4,%esi
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214 subl $1,%ecx
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215 jnz 2b
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216 addl %esi,%edi
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217 jmp 4f
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218 # copy aligned dwords
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219 3: rep; smovl
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220 4: movl %eax,%ecx
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221 5: andl $3,%ecx
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222 jz 7f
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223 # copy suffix
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224 xorl %eax,%eax
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225 6: movb (%esi,%eax,1),%dl
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226 movb %dl,(%edi,%eax,1)
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227 addl $1,%eax
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228 subl $1,%ecx
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229 jnz 6b
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230 7: popl %edi
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231 popl %esi
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232 ret
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233 acb_CopyLeft:
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234 std
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235 leal -4(%edi,%ecx),%edi # to + count - 4
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236 movl %eax,%esi # from + count - 1
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237 movl %ecx,%eax
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238 subl $3,%esi # from + count - 4
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239 cmpl $3,%ecx
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240 jbe 5f
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241 1: shrl $2,%ecx
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242 jz 4f
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243 cmpl $32,%ecx
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244 jbe 2f # <= 32 dwords
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245 rep; smovl
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246 jmp 4f
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247 .space 8
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248 2: subl %esi,%edi
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249 .p2align 4,,15
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250 3: movl (%esi),%edx
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251 movl %edx,(%edi,%esi,1)
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252 subl $4,%esi
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253 subl $1,%ecx
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254 jnz 3b
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255 addl %esi,%edi
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256 4: movl %eax,%ecx
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257 5: andl $3,%ecx
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258 jz 7f
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259 subl %esi,%edi
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260 addl $3,%esi
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261 6: movb (%esi),%dl
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262 movb %dl,(%edi,%esi,1)
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263 subl $1,%esi
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264 subl $1,%ecx
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265 jnz 6b
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266 7: cld
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267 popl %edi
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268 popl %esi
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269 ret
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270
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271 # Support for void Copy::conjoint_jshorts_atomic(void* from,
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272 # void* to,
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273 # size_t count)
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274 .p2align 4,,15
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275 ELF_TYPE(_Copy_conjoint_jshorts_atomic,@function)
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276 SYMBOL(_Copy_conjoint_jshorts_atomic):
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277 pushl %esi
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278 movl 4+12(%esp),%ecx # count
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279 pushl %edi
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280 movl 8+ 4(%esp),%esi # from
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281 movl 8+ 8(%esp),%edi # to
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282 cmpl %esi,%edi
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283 leal -2(%esi,%ecx,2),%eax # from + count*2 - 2
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284 jbe cs_CopyRight
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285 cmpl %eax,%edi
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286 jbe cs_CopyLeft
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287 # copy from low to high
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288 cs_CopyRight:
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289 # align source address at dword address boundary
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290 movl %esi,%eax # original from
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291 andl $3,%eax # either 0 or 2
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292 jz 1f # no prefix
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293 # copy prefix
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294 subl $1,%ecx
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295 jl 5f # zero count
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296 movw (%esi),%dx
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297 movw %dx,(%edi)
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298 addl %eax,%esi # %eax == 2
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299 addl %eax,%edi
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300 1: movl %ecx,%eax # word count less prefix
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301 sarl %ecx # dword count
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302 jz 4f # no dwords to move
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303 cmpl $32,%ecx
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304 jbe 2f # <= 32 dwords
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305 # copy aligned dwords
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306 rep; smovl
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307 jmp 4f
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308 # copy aligned dwords
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309 2: subl %esi,%edi
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310 .p2align 4,,15
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311 3: movl (%esi),%edx
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312 movl %edx,(%edi,%esi,1)
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313 addl $4,%esi
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314 subl $1,%ecx
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315 jnz 3b
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316 addl %esi,%edi
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317 4: andl $1,%eax # suffix count
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318 jz 5f # no suffix
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319 # copy suffix
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320 movw (%esi),%dx
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321 movw %dx,(%edi)
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322 5: popl %edi
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323 popl %esi
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324 ret
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325 # copy from high to low
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326 cs_CopyLeft:
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327 std
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328 leal -4(%edi,%ecx,2),%edi # to + count*2 - 4
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329 movl %eax,%esi # from + count*2 - 2
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330 movl %ecx,%eax
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331 subl $2,%esi # from + count*2 - 4
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332 1: sarl %ecx # dword count
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333 jz 4f # no dwords to move
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334 cmpl $32,%ecx
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335 ja 3f # > 32 dwords
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336 subl %esi,%edi
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337 .p2align 4,,15
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338 2: movl (%esi),%edx
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339 movl %edx,(%edi,%esi,1)
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340 subl $4,%esi
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341 subl $1,%ecx
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342 jnz 2b
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343 addl %esi,%edi
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344 jmp 4f
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345 3: rep; smovl
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346 4: andl $1,%eax # suffix count
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347 jz 5f # no suffix
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348 # copy suffix
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349 addl $2,%esi
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350 addl $2,%edi
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351 movw (%esi),%dx
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352 movw %dx,(%edi)
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353 5: cld
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354 popl %edi
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355 popl %esi
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356 ret
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357
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358 # Support for void Copy::arrayof_conjoint_jshorts(void* from,
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359 # void* to,
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360 # size_t count)
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361 .p2align 4,,15
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362 ELF_TYPE(_Copy_arrayof_conjoint_jshorts,@function)
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363 SYMBOL(_Copy_arrayof_conjoint_jshorts):
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364 pushl %esi
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365 movl 4+12(%esp),%ecx # count
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366 pushl %edi
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367 movl 8+ 4(%esp),%esi # from
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368 movl 8+ 8(%esp),%edi # to
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369 cmpl %esi,%edi
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370 leal -2(%esi,%ecx,2),%eax # from + count*2 - 2
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371 jbe acs_CopyRight
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372 cmpl %eax,%edi
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373 jbe acs_CopyLeft
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374 acs_CopyRight:
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375 movl %ecx,%eax # word count
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376 sarl %ecx # dword count
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377 jz 4f # no dwords to move
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378 cmpl $32,%ecx
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379 jbe 2f # <= 32 dwords
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380 # copy aligned dwords
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381 rep; smovl
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382 jmp 4f
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383 # copy aligned dwords
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4006
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384 .space 5
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385 2: subl %esi,%edi
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3960
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386 .p2align 4,,15
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387 3: movl (%esi),%edx
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388 movl %edx,(%edi,%esi,1)
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389 addl $4,%esi
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390 subl $1,%ecx
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391 jnz 3b
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392 addl %esi,%edi
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393 4: andl $1,%eax # suffix count
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394 jz 5f # no suffix
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395 # copy suffix
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396 movw (%esi),%dx
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397 movw %dx,(%edi)
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398 5: popl %edi
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399 popl %esi
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400 ret
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401 acs_CopyLeft:
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402 std
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403 leal -4(%edi,%ecx,2),%edi # to + count*2 - 4
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404 movl %eax,%esi # from + count*2 - 2
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405 movl %ecx,%eax
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406 subl $2,%esi # from + count*2 - 4
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|
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407 sarl %ecx # dword count
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408 jz 4f # no dwords to move
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409 cmpl $32,%ecx
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410 ja 3f # > 32 dwords
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|
411 subl %esi,%edi
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|
412 .p2align 4,,15
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413 2: movl (%esi),%edx
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414 movl %edx,(%edi,%esi,1)
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|
|
415 subl $4,%esi
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416 subl $1,%ecx
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417 jnz 2b
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418 addl %esi,%edi
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|
|
419 jmp 4f
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420 3: rep; smovl
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421 4: andl $1,%eax # suffix count
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422 jz 5f # no suffix
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|
423 # copy suffix
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|
424 addl $2,%esi
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|
425 addl $2,%edi
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426 movw (%esi),%dx
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427 movw %dx,(%edi)
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428 5: cld
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|
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429 popl %edi
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|
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430 popl %esi
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|
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431 ret
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432
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|
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433 # Support for void Copy::conjoint_jints_atomic(void* from,
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434 # void* to,
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435 # size_t count)
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436 # Equivalent to
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|
|
437 # arrayof_conjoint_jints
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|
|
438 .p2align 4,,15
|
|
4006
|
439 ELF_TYPE(_Copy_conjoint_jints_atomic,@function)
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|
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440 ELF_TYPE(_Copy_arrayof_conjoint_jints,@function)
|
|
3960
|
441 SYMBOL(_Copy_conjoint_jints_atomic):
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|
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442 SYMBOL(_Copy_arrayof_conjoint_jints):
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443 pushl %esi
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444 movl 4+12(%esp),%ecx # count
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445 pushl %edi
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446 movl 8+ 4(%esp),%esi # from
|
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447 movl 8+ 8(%esp),%edi # to
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|
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448 cmpl %esi,%edi
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|
|
449 leal -4(%esi,%ecx,4),%eax # from + count*4 - 4
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450 jbe ci_CopyRight
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451 cmpl %eax,%edi
|
|
4006
|
452 jbe ci_CopyLeft
|
|
3960
|
453 ci_CopyRight:
|
|
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454 cmpl $32,%ecx
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|
|
455 jbe 2f # <= 32 dwords
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456 rep; smovl
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|
|
457 popl %edi
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|
|
458 popl %esi
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|
|
459 ret
|
|
4006
|
460 .space 10
|
|
3960
|
461 2: subl %esi,%edi
|
|
|
462 jmp 4f
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|
|
463 .p2align 4,,15
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|
|
464 3: movl (%esi),%edx
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|
|
465 movl %edx,(%edi,%esi,1)
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|
|
466 addl $4,%esi
|
|
|
467 4: subl $1,%ecx
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|
|
468 jge 3b
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|
|
469 popl %edi
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|
|
470 popl %esi
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|
|
471 ret
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|
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472 ci_CopyLeft:
|
|
|
473 std
|
|
|
474 leal -4(%edi,%ecx,4),%edi # to + count*4 - 4
|
|
|
475 cmpl $32,%ecx
|
|
|
476 ja 4f # > 32 dwords
|
|
|
477 subl %eax,%edi # eax == from + count*4 - 4
|
|
|
478 jmp 3f
|
|
|
479 .p2align 4,,15
|
|
|
480 2: movl (%eax),%edx
|
|
|
481 movl %edx,(%edi,%eax,1)
|
|
|
482 subl $4,%eax
|
|
|
483 3: subl $1,%ecx
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|
|
484 jge 2b
|
|
|
485 cld
|
|
|
486 popl %edi
|
|
|
487 popl %esi
|
|
|
488 ret
|
|
|
489 4: movl %eax,%esi # from + count*4 - 4
|
|
|
490 rep; smovl
|
|
|
491 cld
|
|
|
492 popl %edi
|
|
|
493 popl %esi
|
|
|
494 ret
|
|
4006
|
495
|
|
3960
|
496 # Support for void Copy::conjoint_jlongs_atomic(jlong* from,
|
|
|
497 # jlong* to,
|
|
|
498 # size_t count)
|
|
|
499 #
|
|
|
500 # 32-bit
|
|
|
501 #
|
|
|
502 # count treated as signed
|
|
|
503 #
|
|
|
504 # // if (from > to) {
|
|
|
505 # while (--count >= 0) {
|
|
|
506 # *to++ = *from++;
|
|
|
507 # }
|
|
|
508 # } else {
|
|
|
509 # while (--count >= 0) {
|
|
|
510 # to[count] = from[count];
|
|
|
511 # }
|
|
|
512 # }
|
|
|
513 .p2align 4,,15
|
|
4006
|
514 ELF_TYPE(_Copy_conjoint_jlongs_atomic,@function)
|
|
3960
|
515 SYMBOL(_Copy_conjoint_jlongs_atomic):
|
|
|
516 movl 4+8(%esp),%ecx # count
|
|
|
517 movl 4+0(%esp),%eax # from
|
|
|
518 movl 4+4(%esp),%edx # to
|
|
|
519 cmpl %eax,%edx
|
|
|
520 jae cla_CopyLeft
|
|
|
521 cla_CopyRight:
|
|
|
522 subl %eax,%edx
|
|
|
523 jmp 2f
|
|
|
524 .p2align 4,,15
|
|
|
525 1: fildll (%eax)
|
|
|
526 fistpll (%edx,%eax,1)
|
|
|
527 addl $8,%eax
|
|
|
528 2: subl $1,%ecx
|
|
|
529 jge 1b
|
|
|
530 ret
|
|
|
531 .p2align 4,,15
|
|
|
532 3: fildll (%eax,%ecx,8)
|
|
|
533 fistpll (%edx,%ecx,8)
|
|
|
534 cla_CopyLeft:
|
|
|
535 subl $1,%ecx
|
|
|
536 jge 3b
|
|
|
537 ret
|
|
|
538
|
|
|
539 # Support for void Copy::arrayof_conjoint_jshorts(void* from,
|
|
|
540 # void* to,
|
|
|
541 # size_t count)
|
|
|
542 .p2align 4,,15
|
|
4006
|
543 ELF_TYPE(_mmx_Copy_arrayof_conjoint_jshorts,@function)
|
|
3960
|
544 SYMBOL(_mmx_Copy_arrayof_conjoint_jshorts):
|
|
|
545 pushl %esi
|
|
|
546 movl 4+12(%esp),%ecx
|
|
|
547 pushl %edi
|
|
|
548 movl 8+ 4(%esp),%esi
|
|
|
549 movl 8+ 8(%esp),%edi
|
|
|
550 cmpl %esi,%edi
|
|
|
551 leal -2(%esi,%ecx,2),%eax
|
|
|
552 jbe mmx_acs_CopyRight
|
|
|
553 cmpl %eax,%edi
|
|
|
554 jbe mmx_acs_CopyLeft
|
|
|
555 mmx_acs_CopyRight:
|
|
|
556 movl %ecx,%eax
|
|
|
557 sarl %ecx
|
|
|
558 je 5f
|
|
|
559 cmpl $33,%ecx
|
|
|
560 jae 3f
|
|
4006
|
561 1: subl %esi,%edi
|
|
3960
|
562 .p2align 4,,15
|
|
|
563 2: movl (%esi),%edx
|
|
|
564 movl %edx,(%edi,%esi,1)
|
|
|
565 addl $4,%esi
|
|
|
566 subl $1,%ecx
|
|
|
567 jnz 2b
|
|
|
568 addl %esi,%edi
|
|
4006
|
569 jmp 5f
|
|
3960
|
570 3: smovl # align to 8 bytes, we know we are 4 byte aligned to start
|
|
|
571 subl $1,%ecx
|
|
|
572 4: .p2align 4,,15
|
|
|
573 movq 0(%esi),%mm0
|
|
|
574 addl $64,%edi
|
|
|
575 movq 8(%esi),%mm1
|
|
|
576 subl $16,%ecx
|
|
|
577 movq 16(%esi),%mm2
|
|
|
578 movq %mm0,-64(%edi)
|
|
|
579 movq 24(%esi),%mm0
|
|
|
580 movq %mm1,-56(%edi)
|
|
|
581 movq 32(%esi),%mm1
|
|
|
582 movq %mm2,-48(%edi)
|
|
|
583 movq 40(%esi),%mm2
|
|
|
584 movq %mm0,-40(%edi)
|
|
|
585 movq 48(%esi),%mm0
|
|
|
586 movq %mm1,-32(%edi)
|
|
|
587 movq 56(%esi),%mm1
|
|
|
588 movq %mm2,-24(%edi)
|
|
|
589 movq %mm0,-16(%edi)
|
|
|
590 addl $64,%esi
|
|
|
591 movq %mm1,-8(%edi)
|
|
|
592 cmpl $16,%ecx
|
|
|
593 jge 4b
|
|
|
594 emms
|
|
4006
|
595 testl %ecx,%ecx
|
|
|
596 ja 1b
|
|
3960
|
597 5: andl $1,%eax
|
|
|
598 je 7f
|
|
|
599 6: movw (%esi),%dx
|
|
|
600 movw %dx,(%edi)
|
|
4006
|
601 7: popl %edi
|
|
3960
|
602 popl %esi
|
|
|
603 ret
|
|
|
604 mmx_acs_CopyLeft:
|
|
|
605 std
|
|
|
606 leal -4(%edi,%ecx,2),%edi
|
|
|
607 movl %eax,%esi
|
|
|
608 movl %ecx,%eax
|
|
|
609 subl $2,%esi
|
|
|
610 sarl %ecx
|
|
|
611 je 4f
|
|
|
612 cmpl $32,%ecx
|
|
|
613 ja 3f
|
|
|
614 subl %esi,%edi
|
|
|
615 .p2align 4,,15
|
|
|
616 2: movl (%esi),%edx
|
|
|
617 movl %edx,(%edi,%esi,1)
|
|
|
618 subl $4,%esi
|
|
|
619 subl $1,%ecx
|
|
|
620 jnz 2b
|
|
|
621 addl %esi,%edi
|
|
|
622 jmp 4f
|
|
|
623 3: rep; smovl
|
|
|
624 4: andl $1,%eax
|
|
|
625 je 6f
|
|
|
626 addl $2,%esi
|
|
|
627 addl $2,%edi
|
|
|
628 5: movw (%esi),%dx
|
|
|
629 movw %dx,(%edi)
|
|
|
630 6: cld
|
|
|
631 popl %edi
|
|
|
632 popl %esi
|
|
|
633 ret
|
|
|
634
|
|
|
635
|
|
|
636 # Support for jlong Atomic::cmpxchg(jlong exchange_value,
|
|
|
637 # volatile jlong* dest,
|
|
|
638 # jlong compare_value,
|
|
|
639 # bool is_MP)
|
|
|
640 #
|
|
|
641 .p2align 4,,15
|
|
4006
|
642 ELF_TYPE(_Atomic_cmpxchg_long,@function)
|
|
3960
|
643 SYMBOL(_Atomic_cmpxchg_long):
|
|
|
644 # 8(%esp) : return PC
|
|
|
645 pushl %ebx # 4(%esp) : old %ebx
|
|
|
646 pushl %edi # 0(%esp) : old %edi
|
|
|
647 movl 12(%esp), %ebx # 12(%esp) : exchange_value (low)
|
|
|
648 movl 16(%esp), %ecx # 16(%esp) : exchange_value (high)
|
|
|
649 movl 24(%esp), %eax # 24(%esp) : compare_value (low)
|
|
|
650 movl 28(%esp), %edx # 28(%esp) : compare_value (high)
|
|
|
651 movl 20(%esp), %edi # 20(%esp) : dest
|
|
|
652 cmpl $0, 32(%esp) # 32(%esp) : is_MP
|
|
|
653 je 1f
|
|
|
654 lock
|
|
|
655 1: cmpxchg8b (%edi)
|
|
|
656 popl %edi
|
|
|
657 popl %ebx
|
|
|
658 ret
|
|
|
659
|
|
|
660
|
|
|
661 # Support for jlong Atomic::load and Atomic::store.
|
|
|
662 # void _Atomic_move_long(volatile jlong* src, volatile jlong* dst)
|
|
|
663 .p2align 4,,15
|
|
4006
|
664 ELF_TYPE(_Atomic_move_long,@function)
|
|
3960
|
665 SYMBOL(_Atomic_move_long):
|
|
|
666 movl 4(%esp), %eax # src
|
|
|
667 fildll (%eax)
|
|
|
668 movl 8(%esp), %eax # dest
|
|
|
669 fistpll (%eax)
|
|
|
670 ret
|
|
|
671
|
