1 | #
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2 | # Copyright (c) 2005 Jakub Jermar
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3 | # All rights reserved.
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4 | #
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5 | # Redistribution and use in source and binary forms, with or without
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6 | # modification, are permitted provided that the following conditions
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7 | # are met:
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8 | #
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9 | # - Redistributions of source code must retain the above copyright
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10 | # notice, this list of conditions and the following disclaimer.
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11 | # - Redistributions in binary form must reproduce the above copyright
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12 | # notice, this list of conditions and the following disclaimer in the
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13 | # documentation and/or other materials provided with the distribution.
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14 | # - The name of the author may not be used to endorse or promote products
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15 | # derived from this software without specific prior written permission.
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16 | #
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17 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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18 | # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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19 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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20 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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21 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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22 | # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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23 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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24 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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25 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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26 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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27 | #
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28 |
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29 | #include <arch/arch.h>
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30 | #include <arch/stack.h>
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31 |
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32 | .text
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33 |
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34 | .register %g2, #scratch
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35 | .register %g3, #scratch
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36 |
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37 | /*
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38 | * This is the assembly language version of our _memcpy() generated by gcc.
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39 | */
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40 | .global memcpy
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41 | memcpy:
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42 | mov %o0, %o3 ! save dst
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43 | add %o1, 7, %g1
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44 | and %g1, -8, %g1
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45 | cmp %o1, %g1
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46 | be,pn %xcc, 3f
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47 | add %o0, 7, %g1
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48 | mov 0, %g3
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49 | 0:
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50 | brz,pn %o2, 2f
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51 | mov 0, %g2
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52 | 1:
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53 | ldub [%g3 + %o1], %g1
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54 | add %g2, 1, %g2
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55 | cmp %o2, %g2
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56 | stb %g1, [%g3 + %o0]
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57 | bne,pt %xcc, 1b
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58 | mov %g2, %g3
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59 | 2:
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60 | jmp %o7 + 8 ! exit point
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61 | mov %o3, %o0
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62 | 3:
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63 | and %g1, -8, %g1
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64 | cmp %o0, %g1
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65 | bne,pt %xcc, 0b
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66 | mov 0, %g3
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67 | srlx %o2, 3, %g4
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68 | brz,pn %g4, 5f
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69 | mov 0, %g5
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70 | 4:
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71 | sllx %g3, 3, %g2
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72 | add %g5, 1, %g3
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73 | ldx [%o1 + %g2], %g1
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74 | mov %g3, %g5
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75 | cmp %g4, %g3
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76 | bne,pt %xcc, 4b
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77 | stx %g1, [%o0 + %g2]
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78 | 5:
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79 | and %o2, 7, %o2
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80 | brz,pn %o2, 2b
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81 | sllx %g4, 3, %g1
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82 | mov 0, %g2
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83 | add %g1, %o0, %o0
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84 | add %g1, %o1, %g4
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85 | mov 0, %g3
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86 | 6:
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87 | ldub [%g2 + %g4], %g1
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88 | stb %g1, [%g2 + %o0]
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89 | add %g3, 1, %g2
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90 | cmp %o2, %g2
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91 | bne,pt %xcc, 6b
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92 | mov %g2, %g3
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93 |
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94 | jmp %o7 + 8 ! exit point
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95 | mov %o3, %o0
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96 |
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97 | /*
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98 | * Almost the same as memcpy() except the loads are from userspace.
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99 | */
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100 | .global memcpy_from_uspace
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101 | memcpy_from_uspace:
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102 | mov %o0, %o3 ! save dst
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103 | add %o1, 7, %g1
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104 | and %g1, -8, %g1
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105 | cmp %o1, %g1
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106 | be,pn %xcc, 3f
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107 | add %o0, 7, %g1
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108 | mov 0, %g3
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109 | 0:
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110 | brz,pn %o2, 2f
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111 | mov 0, %g2
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112 | 1:
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113 | lduba [%g3 + %o1] ASI_AIUS, %g1
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114 | add %g2, 1, %g2
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115 | cmp %o2, %g2
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116 | stb %g1, [%g3 + %o0]
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117 | bne,pt %xcc, 1b
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118 | mov %g2, %g3
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119 | 2:
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120 | jmp %o7 + 8 ! exit point
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121 | mov %o3, %o0
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122 | 3:
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123 | and %g1, -8, %g1
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124 | cmp %o0, %g1
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125 | bne,pt %xcc, 0b
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126 | mov 0, %g3
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127 | srlx %o2, 3, %g4
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128 | brz,pn %g4, 5f
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129 | mov 0, %g5
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130 | 4:
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131 | sllx %g3, 3, %g2
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132 | add %g5, 1, %g3
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133 | ldxa [%o1 + %g2] ASI_AIUS, %g1
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134 | mov %g3, %g5
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135 | cmp %g4, %g3
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136 | bne,pt %xcc, 4b
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137 | stx %g1, [%o0 + %g2]
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138 | 5:
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139 | and %o2, 7, %o2
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140 | brz,pn %o2, 2b
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141 | sllx %g4, 3, %g1
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142 | mov 0, %g2
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143 | add %g1, %o0, %o0
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144 | add %g1, %o1, %g4
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145 | mov 0, %g3
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146 | 6:
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147 | lduba [%g2 + %g4] ASI_AIUS, %g1
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148 | stb %g1, [%g2 + %o0]
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149 | add %g3, 1, %g2
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150 | cmp %o2, %g2
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151 | bne,pt %xcc, 6b
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152 | mov %g2, %g3
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153 |
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154 | jmp %o7 + 8 ! exit point
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155 | mov %o3, %o0
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156 |
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157 | /*
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158 | * Almost the same as memcpy() except the stores are to userspace.
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159 | */
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160 | .global memcpy_to_uspace
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161 | memcpy_to_uspace:
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162 | mov %o0, %o3 ! save dst
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163 | add %o1, 7, %g1
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164 | and %g1, -8, %g1
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165 | cmp %o1, %g1
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166 | be,pn %xcc, 3f
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167 | add %o0, 7, %g1
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168 | mov 0, %g3
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169 | 0:
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170 | brz,pn %o2, 2f
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171 | mov 0, %g2
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172 | 1:
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173 | ldub [%g3 + %o1], %g1
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174 | add %g2, 1, %g2
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175 | cmp %o2, %g2
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176 | stba %g1, [%g3 + %o0] ASI_AIUS
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177 | bne,pt %xcc, 1b
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178 | mov %g2, %g3
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179 | 2:
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180 | jmp %o7 + 8 ! exit point
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181 | mov %o3, %o0
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182 | 3:
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183 | and %g1, -8, %g1
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184 | cmp %o0, %g1
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185 | bne,pt %xcc, 0b
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186 | mov 0, %g3
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187 | srlx %o2, 3, %g4
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188 | brz,pn %g4, 5f
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189 | mov 0, %g5
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190 | 4:
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191 | sllx %g3, 3, %g2
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192 | add %g5, 1, %g3
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193 | ldx [%o1 + %g2], %g1
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194 | mov %g3, %g5
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195 | cmp %g4, %g3
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196 | bne,pt %xcc, 4b
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197 | stxa %g1, [%o0 + %g2] ASI_AIUS
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198 | 5:
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199 | and %o2, 7, %o2
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200 | brz,pn %o2, 2b
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201 | sllx %g4, 3, %g1
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202 | mov 0, %g2
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203 | add %g1, %o0, %o0
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204 | add %g1, %o1, %g4
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205 | mov 0, %g3
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206 | 6:
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207 | ldub [%g2 + %g4], %g1
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208 | stba %g1, [%g2 + %o0] ASI_AIUS
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209 | add %g3, 1, %g2
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210 | cmp %o2, %g2
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211 | bne,pt %xcc, 6b
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212 | mov %g2, %g3
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213 |
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214 | jmp %o7 + 8 ! exit point
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215 | mov %o3, %o0
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216 |
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217 | .global memcpy_from_uspace_failover_address
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218 | .global memcpy_to_uspace_failover_address
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219 | memcpy_from_uspace_failover_address:
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220 | memcpy_to_uspace_failover_address:
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221 | jmp %o7 + 8 ! exit point
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222 | mov %g0, %o0 ! return 0 on failure
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223 |
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224 | .global memsetb
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225 | memsetb:
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226 | ba %xcc, _memsetb
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227 | nop
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228 |
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229 | .global memsetw
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230 | memsetw:
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231 | ba %xcc, _memsetw
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232 | nop
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233 |
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