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55 | jermar | 1 | # |
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 | |||
29 | .text |
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30 | |||
31 | .global context_save |
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32 | .global context_restore |
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33 | |||
34 | context_save: |
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83 | jermar | 35 | alloc loc0 = ar.pfs, 1, 10, 0, 0 |
36 | mov loc1 = ar.unat ;; |
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59 | jermar | 37 | |
83 | jermar | 38 | st8 [in0] = loc0, 8 ;; /* save ar.pfs */ |
39 | st8 [in0] = loc1, 8 ;; /* save ar.unat (caller) */ |
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40 | mov loc2 = in0 ;; |
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41 | add in0 = 8, in0 ;; /* skip ar.unat (callee) */ |
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42 | |||
59 | jermar | 43 | /* |
44 | * TODO: save the rest of the context registers. |
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45 | */ |
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46 | |||
82 | jermar | 47 | /* |
83 | jermar | 48 | * Save general registers including NaT bits |
82 | jermar | 49 | */ |
83 | jermar | 50 | st8.spill [in0] = r1, 8 ;; |
51 | st8.spill [in0] = r2, 8 ;; |
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52 | st8.spill [in0] = r3, 8 ;; |
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53 | st8.spill [in0] = r4, 8 ;; |
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54 | st8.spill [in0] = r5, 8 ;; |
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55 | st8.spill [in0] = r6, 8 ;; |
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56 | st8.spill [in0] = r7, 8 ;; |
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57 | st8.spill [in0] = r8, 8 ;; |
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58 | st8.spill [in0] = r9, 8 ;; |
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59 | st8.spill [in0] = r10, 8 ;; |
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60 | st8.spill [in0] = r11, 8 ;; |
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61 | st8.spill [in0] = r12, 8 ;; /* save sp */ |
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62 | st8.spill [in0] = r13, 8 ;; |
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63 | st8.spill [in0] = r14, 8 ;; |
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64 | st8.spill [in0] = r15, 8 ;; |
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65 | st8.spill [in0] = r16, 8 ;; |
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66 | st8.spill [in0] = r17, 8 ;; |
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67 | st8.spill [in0] = r18, 8 ;; |
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68 | st8.spill [in0] = r19, 8 ;; |
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69 | st8.spill [in0] = r20, 8 ;; |
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70 | st8.spill [in0] = r21, 8 ;; |
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71 | st8.spill [in0] = r22, 8 ;; |
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72 | st8.spill [in0] = r23, 8 ;; |
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73 | st8.spill [in0] = r24, 8 ;; |
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74 | st8.spill [in0] = r25, 8 ;; |
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75 | st8.spill [in0] = r26, 8 ;; |
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76 | st8.spill [in0] = r27, 8 ;; |
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77 | st8.spill [in0] = r28, 8 ;; |
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78 | st8.spill [in0] = r29, 8 ;; |
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79 | st8.spill [in0] = r30, 8 ;; |
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80 | st8.spill [in0] = r31, 8 ;; |
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59 | jermar | 81 | |
83 | jermar | 82 | mov loc3 = ar.unat ;; |
83 | st8 [loc2] = loc3 /* save ar.unat (callee) */ |
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84 | |||
82 | jermar | 85 | /* |
86 | * Save branch registers |
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87 | */ |
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83 | jermar | 88 | mov loc2 = b0 ;; |
89 | st8 [in0] = loc2, 8 /* save pc */ |
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90 | mov loc3 = b1 ;; |
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82 | jermar | 91 | st8 [in0] = loc3, 8 |
83 | jermar | 92 | mov loc4 = b2 ;; |
82 | jermar | 93 | st8 [in0] = loc4, 8 |
83 | jermar | 94 | mov loc5 = b3 ;; |
82 | jermar | 95 | st8 [in0] = loc5, 8 |
83 | jermar | 96 | mov loc6 = b4 ;; |
82 | jermar | 97 | st8 [in0] = loc6, 8 |
83 | jermar | 98 | mov loc7 = b5 ;; |
82 | jermar | 99 | st8 [in0] = loc7, 8 |
83 | jermar | 100 | mov loc8 = b6 ;; |
82 | jermar | 101 | st8 [in0] = loc8, 8 |
83 | jermar | 102 | mov loc9 = b7 ;; |
103 | st8 [in0] = loc9, 8 |
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82 | jermar | 104 | |
105 | /* |
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106 | * Save predicate registers |
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107 | */ |
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83 | jermar | 108 | mov loc2 = pr ;; |
109 | st8 [in0] = loc2, 8 |
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59 | jermar | 110 | |
111 | mov ar.pfs = loc0 |
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83 | jermar | 112 | mov ar.unat = loc1 |
59 | jermar | 113 | |
114 | add r8 = r0, r0, 1 /* context_save returns 1 */ |
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60 | jermar | 115 | br.ret.sptk.many b0 |
55 | jermar | 116 | |
117 | context_restore: |
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83 | jermar | 118 | alloc loc0 = ar.pfs, 1, 10, 0, 0 ;; |
59 | jermar | 119 | |
120 | /* |
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121 | * TODO: restore the rest of the context registers. |
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122 | */ |
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123 | |||
83 | jermar | 124 | ld8 loc0 = [in0], 8 ;; /* load pfs */ |
125 | ld8 loc1 = [in0], 8 ;; /* load unat (caller) */ |
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126 | ld8 loc2 = [in0], 8 ;; /* load unat (callee) */ |
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127 | |||
128 | mov ar.unat = loc2 ;; |
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129 | |||
82 | jermar | 130 | /* |
83 | jermar | 131 | * Restore general registers including NaT bits |
82 | jermar | 132 | */ |
83 | jermar | 133 | ld8.fill r1 = [in0], 8 ;; |
134 | ld8.fill r2 = [in0], 8 ;; |
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135 | ld8.fill r3 = [in0], 8 ;; |
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136 | ld8.fill r4 = [in0], 8 ;; |
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137 | ld8.fill r5 = [in0], 8 ;; |
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138 | ld8.fill r6 = [in0], 8 ;; |
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139 | ld8.fill r7 = [in0], 8 ;; |
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140 | ld8.fill r8 = [in0], 8 ;; |
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141 | ld8.fill r9 = [in0], 8 ;; |
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142 | ld8.fill r10 = [in0], 8 ;; |
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143 | ld8.fill r11 = [in0], 8 ;; |
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144 | ld8.fill r12 = [in0], 8 ;; /* restore sp */ |
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145 | ld8.fill r13 = [in0], 8 ;; |
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146 | ld8.fill r14 = [in0], 8 ;; |
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147 | ld8.fill r15 = [in0], 8 ;; |
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148 | ld8.fill r16 = [in0], 8 ;; |
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149 | ld8.fill r17 = [in0], 8 ;; |
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150 | ld8.fill r18 = [in0], 8 ;; |
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151 | ld8.fill r19 = [in0], 8 ;; |
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152 | ld8.fill r20 = [in0], 8 ;; |
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153 | ld8.fill r21 = [in0], 8 ;; |
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154 | ld8.fill r22 = [in0], 8 ;; |
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155 | ld8.fill r23 = [in0], 8 ;; |
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156 | ld8.fill r24 = [in0], 8 ;; |
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157 | ld8.fill r25 = [in0], 8 ;; |
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158 | ld8.fill r26 = [in0], 8 ;; |
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159 | ld8.fill r27 = [in0], 8 ;; |
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160 | ld8.fill r28 = [in0], 8 ;; |
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161 | ld8.fill r29 = [in0], 8 ;; |
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162 | ld8.fill r30 = [in0], 8 ;; |
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163 | ld8.fill r31 = [in0], 8 ;; |
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59 | jermar | 164 | |
82 | jermar | 165 | /* |
166 | * Restore branch registers |
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167 | */ |
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83 | jermar | 168 | ld8 loc2 = [in0], 8 ;; /* restore pc */ |
169 | mov b0 = loc2 |
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82 | jermar | 170 | ld8 loc3 = [in0], 8 ;; |
83 | jermar | 171 | mov b1 = loc3 |
82 | jermar | 172 | ld8 loc4 = [in0], 8 ;; |
83 | jermar | 173 | mov b2 = loc4 |
82 | jermar | 174 | ld8 loc5 = [in0], 8 ;; |
83 | jermar | 175 | mov b3 = loc5 |
82 | jermar | 176 | ld8 loc6 = [in0], 8 ;; |
83 | jermar | 177 | mov b4 = loc6 |
82 | jermar | 178 | ld8 loc7 = [in0], 8 ;; |
83 | jermar | 179 | mov b5 = loc7 |
82 | jermar | 180 | ld8 loc8 = [in0], 8 ;; |
83 | jermar | 181 | mov b6 = loc8 |
182 | ld8 loc9 = [in0], 8 ;; |
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183 | mov b7 = loc9 |
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82 | jermar | 184 | |
83 | jermar | 185 | /* |
186 | * Restore predicate registers |
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187 | */ |
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188 | ld8 loc2 = [in0], 8 ;; |
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189 | mov pr = loc2, ~0 |
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59 | jermar | 190 | |
191 | mov ar.pfs = loc0 |
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83 | jermar | 192 | mov ar.unat = loc1 |
59 | jermar | 193 | |
194 | mov r8 = r0 /* context_restore returns 0 */ |
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60 | jermar | 195 | br.ret.sptk.many b0 |