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1 //
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2 // Copyright 2004-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 // CA 95054 USA or visit www.sun.com if you need additional information or
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21 // have any questions.
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22 //
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23
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24 .globl fixcw
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25 .globl sse_check
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26 .globl sse_unavailable
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27 .globl gs_load
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28 .globl gs_thread
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29 .globl _Atomic_cmpxchg_long_gcc
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30
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31 // NOTE WELL! The _Copy functions are called directly
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32 // from server-compiler-generated code via CallLeafNoFP,
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33 // which means that they *must* either not use floating
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34 // point or use it in the same manner as does the server
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35 // compiler.
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36
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37 .globl _Copy_conjoint_bytes
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38 .globl _Copy_arrayof_conjoint_bytes
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39 .globl _Copy_conjoint_jshorts_atomic
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40 .globl _Copy_arrayof_conjoint_jshorts
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41 .globl _Copy_conjoint_jints_atomic
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42 .globl _Copy_arrayof_conjoint_jints
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43 .globl _Copy_conjoint_jlongs_atomic
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44 .globl _mmx_Copy_arrayof_conjoint_jshorts
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45
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46 .section .text,"ax"
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47
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48 / Support for void os::Solaris::init_thread_fpu_state() in os_solaris_i486.cpp
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49 / Set fpu to 53 bit precision. This happens too early to use a stub.
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50 .align 16
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51 fixcw:
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52 pushl $0x27f
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53 fldcw 0(%esp)
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54 popl %eax
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55 ret
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56
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57 .align 16
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58 .globl SafeFetch32
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59 .globl SafeFetchN
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60 .globl Fetch32PFI, Fetch32Resume
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61 SafeFetch32:
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62 SafeFetchN:
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63 movl 0x8(%esp), %eax
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64 movl 0x4(%esp), %ecx
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65 Fetch32PFI:
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66 movl (%ecx), %eax
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67 Fetch32Resume:
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68 ret
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69
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70
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71 .align 16
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72 .globl SpinPause
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73 SpinPause:
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74 rep
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75 nop
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76 movl $1, %eax
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77 ret
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78
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79
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80 / Test SSE availability, used by os_solaris_i486.cpp
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81 .align 16
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82 sse_check:
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83 / Fault if SSE not available
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84 xorps %xmm0,%xmm0
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85 / No fault
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86 movl $1,%eax
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87 ret
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88 / Signal handler continues here if SSE is not available
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89 sse_unavailable:
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90 xorl %eax,%eax
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91 ret
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92
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93 / Fast thread accessors, used by threadLS_solaris_i486.cpp
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94 .align 16
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95 gs_load:
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96 movl 4(%esp),%ecx
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97 movl %gs:(%ecx),%eax
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98 ret
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99
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100 .align 16
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101 gs_thread:
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102 movl %gs:0x0,%eax
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103 ret
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104
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105 / Support for void Copy::conjoint_bytes(void* from,
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106 / void* to,
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107 / size_t count)
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108 .align 16
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109 _Copy_conjoint_bytes:
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110 pushl %esi
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111 movl 4+12(%esp),%ecx / count
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112 pushl %edi
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113 movl 8+ 4(%esp),%esi / from
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114 movl 8+ 8(%esp),%edi / to
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115 cmpl %esi,%edi
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116 leal -1(%esi,%ecx),%eax / from + count - 1
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117 jbe cb_CopyRight
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118 cmpl %eax,%edi
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119 jbe cb_CopyLeft
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120 / copy from low to high
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121 cb_CopyRight:
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122 cmpl $3,%ecx
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123 jbe 5f / <= 3 bytes
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124 / align source address at dword address boundary
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125 movl %ecx,%eax / original count
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126 movl $4,%ecx
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127 subl %esi,%ecx
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128 andl $3,%ecx / prefix byte count
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129 jz 1f / no prefix
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130 subl %ecx,%eax / byte count less prefix
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131 / copy prefix
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132 subl %esi,%edi
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133 0: movb (%esi),%dl
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134 movb %dl,(%edi,%esi,1)
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135 addl $1,%esi
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136 subl $1,%ecx
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137 jnz 0b
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138 addl %esi,%edi
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139 1: movl %eax,%ecx / byte count less prefix
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140 shrl $2,%ecx / dword count
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141 jz 4f / no dwords to move
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142 cmpl $32,%ecx
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143 jbe 2f / <= 32 dwords
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144 / copy aligned dwords
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145 rep; smovl
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146 jmp 4f
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147 / copy aligned dwords
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148 2: subl %esi,%edi
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149 .align 16
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150 3: movl (%esi),%edx
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151 movl %edx,(%edi,%esi,1)
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152 addl $4,%esi
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153 subl $1,%ecx
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154 jnz 3b
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155 addl %esi,%edi
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156 4: movl %eax,%ecx / byte count less prefix
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157 andl $3,%ecx / suffix byte count
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158 jz 7f / no suffix
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159 / copy suffix
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160 5: xorl %eax,%eax
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161 6: movb (%esi,%eax,1),%dl
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162 movb %dl,(%edi,%eax,1)
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163 addl $1,%eax
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164 subl $1,%ecx
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165 jnz 6b
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166 7: popl %edi
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167 popl %esi
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168 ret
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169 / copy from high to low
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170 cb_CopyLeft:
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171 std
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172 leal -4(%edi,%ecx),%edi / to + count - 4
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173 movl %eax,%esi / from + count - 1
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174 movl %ecx,%eax
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175 subl $3,%esi / from + count - 4
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176 cmpl $3,%ecx
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177 jbe 5f / <= 3 bytes
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178 1: shrl $2,%ecx / dword count
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179 jz 4f / no dwords to move
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180 cmpl $32,%ecx
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181 ja 3f / > 32 dwords
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182 / copy dwords, aligned or not
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183 subl %esi,%edi
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184 .align 16
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185 2: movl (%esi),%edx
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186 movl %edx,(%edi,%esi,1)
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187 subl $4,%esi
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188 subl $1,%ecx
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189 jnz 2b
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190 addl %esi,%edi
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191 jmp 4f
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192 / copy dwords, aligned or not
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193 3: rep; smovl
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194 4: movl %eax,%ecx / byte count
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195 andl $3,%ecx / suffix byte count
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196 jz 7f / no suffix
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197 / copy suffix
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198 5: subl %esi,%edi
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199 addl $3,%esi
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200 6: movb (%esi),%dl
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201 movb %dl,(%edi,%esi,1)
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202 subl $1,%esi
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203 subl $1,%ecx
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204 jnz 6b
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205 7: cld
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206 popl %edi
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207 popl %esi
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208 ret
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209
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210 / Support for void Copy::arrayof_conjoint_bytes(void* from,
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211 / void* to,
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212 / size_t count)
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213 /
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214 / Same as _Copy_conjoint_bytes, except no source alignment check.
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215 .align 16
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216 _Copy_arrayof_conjoint_bytes:
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217 pushl %esi
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218 movl 4+12(%esp),%ecx / count
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219 pushl %edi
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220 movl 8+ 4(%esp),%esi / from
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221 movl 8+ 8(%esp),%edi / to
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222 cmpl %esi,%edi
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223 leal -1(%esi,%ecx),%eax / from + count - 1
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224 jbe acb_CopyRight
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225 cmpl %eax,%edi
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226 jbe acb_CopyLeft
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227 / copy from low to high
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228 acb_CopyRight:
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229 cmpl $3,%ecx
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230 jbe 5f
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231 1: movl %ecx,%eax
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232 shrl $2,%ecx
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233 jz 4f
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234 cmpl $32,%ecx
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235 ja 3f
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236 / copy aligned dwords
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237 subl %esi,%edi
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238 .align 16
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239 2: movl (%esi),%edx
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240 movl %edx,(%edi,%esi,1)
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241 addl $4,%esi
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242 subl $1,%ecx
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243 jnz 2b
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244 addl %esi,%edi
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245 jmp 4f
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246 / copy aligned dwords
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247 3: rep; smovl
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248 4: movl %eax,%ecx
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249 andl $3,%ecx
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250 jz 7f
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251 / copy suffix
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252 5: xorl %eax,%eax
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253 6: movb (%esi,%eax,1),%dl
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254 movb %dl,(%edi,%eax,1)
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255 addl $1,%eax
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256 subl $1,%ecx
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257 jnz 6b
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258 7: popl %edi
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259 popl %esi
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260 ret
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261 acb_CopyLeft:
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262 std
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263 leal -4(%edi,%ecx),%edi / to + count - 4
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264 movl %eax,%esi / from + count - 1
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265 movl %ecx,%eax
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266 subl $3,%esi / from + count - 4
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267 cmpl $3,%ecx
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268 jbe 5f
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269 1: shrl $2,%ecx
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270 jz 4f
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271 cmpl $32,%ecx
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272 jbe 2f / <= 32 dwords
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273 rep; smovl
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274 jmp 4f
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275 .=.+8
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276 2: subl %esi,%edi
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277 .align 16
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278 3: movl (%esi),%edx
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279 movl %edx,(%edi,%esi,1)
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280 subl $4,%esi
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281 subl $1,%ecx
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282 jnz 3b
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283 addl %esi,%edi
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284 4: movl %eax,%ecx
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285 andl $3,%ecx
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286 jz 7f
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287 5: subl %esi,%edi
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288 addl $3,%esi
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289 6: movb (%esi),%dl
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290 movb %dl,(%edi,%esi,1)
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291 subl $1,%esi
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292 subl $1,%ecx
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293 jnz 6b
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294 7: cld
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295 popl %edi
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296 popl %esi
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297 ret
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298
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299 / Support for void Copy::conjoint_jshorts_atomic(void* from,
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300 / void* to,
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301 / size_t count)
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302 .align 16
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303 _Copy_conjoint_jshorts_atomic:
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304 pushl %esi
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305 movl 4+12(%esp),%ecx / count
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306 pushl %edi
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307 movl 8+ 4(%esp),%esi / from
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308 movl 8+ 8(%esp),%edi / to
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309 cmpl %esi,%edi
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310 leal -2(%esi,%ecx,2),%eax / from + count*2 - 2
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311 jbe cs_CopyRight
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312 cmpl %eax,%edi
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313 jbe cs_CopyLeft
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314 / copy from low to high
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315 cs_CopyRight:
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316 / align source address at dword address boundary
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317 movl %esi,%eax / original from
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318 andl $3,%eax / either 0 or 2
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319 jz 1f / no prefix
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320 / copy prefix
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321 movw (%esi),%dx
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322 movw %dx,(%edi)
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323 addl %eax,%esi / %eax == 2
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324 addl %eax,%edi
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325 subl $1,%ecx
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326 1: movl %ecx,%eax / word count less prefix
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327 sarl %ecx / dword count
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328 jz 4f / no dwords to move
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329 cmpl $32,%ecx
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330 jbe 2f / <= 32 dwords
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331 / copy aligned dwords
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332 rep; smovl
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333 jmp 4f
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334 / copy aligned dwords
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335 2: subl %esi,%edi
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336 .align 16
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337 3: movl (%esi),%edx
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338 movl %edx,(%edi,%esi,1)
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339 addl $4,%esi
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340 subl $1,%ecx
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341 jnz 3b
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342 addl %esi,%edi
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343 4: andl $1,%eax / suffix count
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344 jz 5f / no suffix
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345 / copy suffix
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346 movw (%esi),%dx
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347 movw %dx,(%edi)
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348 5: popl %edi
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349 popl %esi
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350 ret
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351 / copy from high to low
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352 cs_CopyLeft:
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353 std
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354 leal -4(%edi,%ecx,2),%edi / to + count*2 - 4
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355 movl %eax,%esi / from + count*2 - 2
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356 movl %ecx,%eax
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357 subl $2,%esi / from + count*2 - 4
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358 1: sarl %ecx / dword count
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359 jz 4f / no dwords to move
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360 cmpl $32,%ecx
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361 ja 3f / > 32 dwords
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362 subl %esi,%edi
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363 .align 16
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364 2: movl (%esi),%edx
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365 movl %edx,(%edi,%esi,1)
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366 subl $4,%esi
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367 subl $1,%ecx
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368 jnz 2b
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369 addl %esi,%edi
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370 jmp 4f
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371 3: rep; smovl
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372 4: andl $1,%eax / suffix count
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373 jz 5f / no suffix
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374 / copy suffix
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375 addl $2,%esi
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376 addl $2,%edi
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377 movw (%esi),%dx
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378 movw %dx,(%edi)
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379 5: cld
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380 popl %edi
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381 popl %esi
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382 ret
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383
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384 / Support for void Copy::arrayof_conjoint_jshorts(void* from,
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385 / void* to,
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386 / size_t count)
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387 .align 16
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388 _Copy_arrayof_conjoint_jshorts:
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389 pushl %esi
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390 movl 4+12(%esp),%ecx / count
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391 pushl %edi
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392 movl 8+ 4(%esp),%esi / from
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393 movl 8+ 8(%esp),%edi / to
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394 cmpl %esi,%edi
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395 leal -2(%esi,%ecx,2),%eax / from + count*2 - 2
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396 jbe acs_CopyRight
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397 cmpl %eax,%edi
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398 jbe acs_CopyLeft
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399 acs_CopyRight:
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400 movl %ecx,%eax / word count
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401 sarl %ecx / dword count
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402 jz 4f / no dwords to move
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403 cmpl $32,%ecx
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404 jbe 2f / <= 32 dwords
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405 / copy aligned dwords
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406 rep; smovl
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407 jmp 4f
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408 / copy aligned dwords
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409 .=.+5
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410 2: subl %esi,%edi
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411 .align 16
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412 3: movl (%esi),%edx
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413 movl %edx,(%edi,%esi,1)
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414 addl $4,%esi
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415 subl $1,%ecx
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416 jnz 3b
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417 addl %esi,%edi
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418 4: andl $1,%eax / suffix count
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419 jz 5f / no suffix
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420 / copy suffix
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421 movw (%esi),%dx
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422 movw %dx,(%edi)
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423 5: popl %edi
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424 popl %esi
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425 ret
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426 acs_CopyLeft:
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427 std
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428 leal -4(%edi,%ecx,2),%edi / to + count*2 - 4
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429 movl %eax,%esi / from + count*2 - 2
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|
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430 movl %ecx,%eax
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431 subl $2,%esi / from + count*2 - 4
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432 sarl %ecx / dword count
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433 jz 4f / no dwords to move
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434 cmpl $32,%ecx
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435 ja 3f / > 32 dwords
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436 subl %esi,%edi
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437 .align 16
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438 2: movl (%esi),%edx
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439 movl %edx,(%edi,%esi,1)
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440 subl $4,%esi
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441 subl $1,%ecx
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442 jnz 2b
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443 addl %esi,%edi
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444 jmp 4f
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445 3: rep; smovl
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446 4: andl $1,%eax / suffix count
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447 jz 5f / no suffix
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448 / copy suffix
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449 addl $2,%esi
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450 addl $2,%edi
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451 movw (%esi),%dx
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452 movw %dx,(%edi)
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453 5: cld
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454 popl %edi
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455 popl %esi
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456 ret
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457
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458 / Support for void Copy::conjoint_jints_atomic(void* from,
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459 / void* to,
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460 / size_t count)
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461 / Equivalent to
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462 / arrayof_conjoint_jints
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463 .align 16
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464 _Copy_conjoint_jints_atomic:
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465 _Copy_arrayof_conjoint_jints:
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466 pushl %esi
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467 movl 4+12(%esp),%ecx / count
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468 pushl %edi
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469 movl 8+ 4(%esp),%esi / from
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470 movl 8+ 8(%esp),%edi / to
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471 cmpl %esi,%edi
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472 leal -4(%esi,%ecx,4),%eax / from + count*4 - 4
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473 jbe ci_CopyRight
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474 cmpl %eax,%edi
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475 jbe ci_CopyLeft
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476 ci_CopyRight:
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477 cmpl $32,%ecx
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478 jbe 2f / <= 32 dwords
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479 rep; smovl
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480 popl %edi
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|
481 popl %esi
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482 ret
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483 .=.+10
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484 2: subl %esi,%edi
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|
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485 .align 16
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486 3: movl (%esi),%edx
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487 movl %edx,(%edi,%esi,1)
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488 addl $4,%esi
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|
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489 subl $1,%ecx
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490 jnz 3b
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491 popl %edi
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492 popl %esi
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493 ret
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494 ci_CopyLeft:
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|
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495 std
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|
|
496 leal -4(%edi,%ecx,4),%edi / to + count*4 - 4
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|
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497 cmpl $32,%ecx
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|
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498 ja 3f / > 32 dwords
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|
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499 subl %eax,%edi / eax == from + count*4 - 4
|
|
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500 .align 16
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|
|
501 2: movl (%eax),%edx
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|
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502 movl %edx,(%edi,%eax,1)
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|
|
503 subl $4,%eax
|
|
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504 subl $1,%ecx
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|
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505 jnz 2b
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506 cld
|
|
|
507 popl %edi
|
|
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508 popl %esi
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509 ret
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|
|
510 3: movl %eax,%esi / from + count*4 - 4
|
|
|
511 rep; smovl
|
|
|
512 cld
|
|
|
513 popl %edi
|
|
|
514 popl %esi
|
|
|
515 ret
|
|
|
516
|
|
|
517 / Support for void Copy::conjoint_jlongs_atomic(jlong* from,
|
|
|
518 / jlong* to,
|
|
|
519 / size_t count)
|
|
|
520 /
|
|
|
521 / 32-bit
|
|
|
522 /
|
|
|
523 / count treated as signed
|
|
|
524 /
|
|
|
525 / if (from > to) {
|
|
|
526 / while (--count >= 0) {
|
|
|
527 / *to++ = *from++;
|
|
|
528 / }
|
|
|
529 / } else {
|
|
|
530 / while (--count >= 0) {
|
|
|
531 / to[count] = from[count];
|
|
|
532 / }
|
|
|
533 / }
|
|
|
534 .align 16
|
|
|
535 _Copy_conjoint_jlongs_atomic:
|
|
|
536 movl 4+8(%esp),%ecx / count
|
|
|
537 movl 4+0(%esp),%eax / from
|
|
|
538 movl 4+4(%esp),%edx / to
|
|
|
539 cmpl %eax,%edx
|
|
|
540 jae cla_CopyLeft
|
|
|
541 cla_CopyRight:
|
|
|
542 subl %eax,%edx
|
|
|
543 jmp 2f
|
|
|
544 .align 16
|
|
|
545 1: fildll (%eax)
|
|
|
546 fistpll (%edx,%eax,1)
|
|
|
547 addl $8,%eax
|
|
|
548 2: subl $1,%ecx
|
|
|
549 jge 1b
|
|
|
550 ret
|
|
|
551 .align 16
|
|
|
552 3: fildll (%eax,%ecx,8)
|
|
|
553 fistpll (%edx,%ecx,8)
|
|
|
554 cla_CopyLeft:
|
|
|
555 subl $1,%ecx
|
|
|
556 jge 3b
|
|
|
557 ret
|
|
|
558
|
|
|
559 / Support for void Copy::arrayof_conjoint_jshorts(void* from,
|
|
|
560 / void* to,
|
|
|
561 / size_t count)
|
|
|
562 .align 16
|
|
|
563 _mmx_Copy_arrayof_conjoint_jshorts:
|
|
|
564 pushl %esi
|
|
|
565 movl 4+12(%esp),%ecx
|
|
|
566 pushl %edi
|
|
|
567 movl 8+ 4(%esp),%esi
|
|
|
568 movl 8+ 8(%esp),%edi
|
|
|
569 cmpl %esi,%edi
|
|
|
570 leal -2(%esi,%ecx,2),%eax
|
|
|
571 jbe mmx_acs_CopyRight
|
|
|
572 cmpl %eax,%edi
|
|
|
573 jbe mmx_acs_CopyLeft
|
|
|
574 mmx_acs_CopyRight:
|
|
|
575 movl %ecx,%eax
|
|
|
576 sarl %ecx
|
|
|
577 je 5f
|
|
|
578 cmpl $33,%ecx
|
|
|
579 jae 3f
|
|
|
580 1: subl %esi,%edi
|
|
|
581 .align 16
|
|
|
582 2: movl (%esi),%edx
|
|
|
583 movl %edx,(%edi,%esi,1)
|
|
|
584 addl $4,%esi
|
|
|
585 subl $1,%ecx
|
|
|
586 jnz 2b
|
|
|
587 addl %esi,%edi
|
|
|
588 jmp 5f
|
|
|
589 3: smovl / align to 8 bytes, we know we are 4 byte aligned to start
|
|
|
590 subl $1,%ecx
|
|
|
591 4: .align 16
|
|
|
592 movq 0(%esi),%mm0
|
|
|
593 addl $64,%edi
|
|
|
594 movq 8(%esi),%mm1
|
|
|
595 subl $16,%ecx
|
|
|
596 movq 16(%esi),%mm2
|
|
|
597 movq %mm0,-64(%edi)
|
|
|
598 movq 24(%esi),%mm0
|
|
|
599 movq %mm1,-56(%edi)
|
|
|
600 movq 32(%esi),%mm1
|
|
|
601 movq %mm2,-48(%edi)
|
|
|
602 movq 40(%esi),%mm2
|
|
|
603 movq %mm0,-40(%edi)
|
|
|
604 movq 48(%esi),%mm0
|
|
|
605 movq %mm1,-32(%edi)
|
|
|
606 movq 56(%esi),%mm1
|
|
|
607 movq %mm2,-24(%edi)
|
|
|
608 movq %mm0,-16(%edi)
|
|
|
609 addl $64,%esi
|
|
|
610 movq %mm1,-8(%edi)
|
|
|
611 cmpl $16,%ecx
|
|
|
612 jge 4b
|
|
|
613 emms
|
|
|
614 testl %ecx,%ecx
|
|
|
615 ja 1b
|
|
|
616 5: andl $1,%eax
|
|
|
617 je 7f
|
|
|
618 6: movw (%esi),%dx
|
|
|
619 movw %dx,(%edi)
|
|
|
620 7: popl %edi
|
|
|
621 popl %esi
|
|
|
622 ret
|
|
|
623 mmx_acs_CopyLeft:
|
|
|
624 std
|
|
|
625 leal -4(%edi,%ecx,2),%edi
|
|
|
626 movl %eax,%esi
|
|
|
627 movl %ecx,%eax
|
|
|
628 subl $2,%esi
|
|
|
629 sarl %ecx
|
|
|
630 je 4f
|
|
|
631 cmpl $32,%ecx
|
|
|
632 ja 3f
|
|
|
633 subl %esi,%edi
|
|
|
634 .align 16
|
|
|
635 2: movl (%esi),%edx
|
|
|
636 movl %edx,(%edi,%esi,1)
|
|
|
637 subl $4,%esi
|
|
|
638 subl $1,%ecx
|
|
|
639 jnz 2b
|
|
|
640 addl %esi,%edi
|
|
|
641 jmp 4f
|
|
|
642 3: rep; smovl
|
|
|
643 4: andl $1,%eax
|
|
|
644 je 6f
|
|
|
645 addl $2,%esi
|
|
|
646 addl $2,%edi
|
|
|
647 5: movw (%esi),%dx
|
|
|
648 movw %dx,(%edi)
|
|
|
649 6: cld
|
|
|
650 popl %edi
|
|
|
651 popl %esi
|
|
|
652 ret
|
|
|
653
|
|
|
654
|
|
|
655 / Support for jlong Atomic::cmpxchg(jlong exchange_value,
|
|
|
656 / volatile jlong* dest,
|
|
|
657 / jlong compare_value,
|
|
|
658 / bool is_MP)
|
|
|
659 / Used only for Solaris/gcc builds
|
|
|
660 .align 16
|
|
|
661 _Atomic_cmpxchg_long_gcc:
|
|
|
662 / 8(%esp) : return PC
|
|
|
663 pushl %ebx / 4(%esp) : old %ebx
|
|
|
664 pushl %edi / 0(%esp) : old %edi
|
|
|
665 movl 12(%esp), %ebx / 12(%esp) : exchange_value (low)
|
|
|
666 movl 16(%esp), %ecx / 16(%esp) : exchange_value (high)
|
|
|
667 movl 24(%esp), %eax / 24(%esp) : compare_value (low)
|
|
|
668 movl 28(%esp), %edx / 28(%esp) : compare_value (high)
|
|
|
669 movl 20(%esp), %edi / 20(%esp) : dest
|
|
|
670 cmpl $0, 32(%esp) / 32(%esp) : is_MP
|
|
|
671 je 1f
|
|
|
672 lock
|
|
|
673 1: cmpxchg8b (%edi)
|
|
|
674 popl %edi
|
|
|
675 popl %ebx
|
|
|
676 ret
|
