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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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| 94 | jermar | 35 | alloc loc0 = ar.pfs, 1, 11, 0, 0 |
| 83 | jermar | 36 | mov loc1 = ar.unat ;; |
| 94 | jermar | 37 | /* loc2 */ |
| 38 | mov loc3 = ar.rsc |
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| 100 | jermar | 39 | |
| 40 | .auto |
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| 41 | |||
| 42 | /* |
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| 43 | * Flush dirty registers to backing store. |
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| 44 | * After this ar.bsp and ar.bspstore are equal. |
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| 45 | */ |
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| 46 | flushrs |
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| 47 | mov loc4 = ar.bsp |
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| 48 | |||
| 49 | /* |
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| 50 | * Put RSE to enforced lazy mode. |
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| 51 | * So that ar.rnat can be read. |
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| 52 | */ |
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| 53 | movl loc5 = ~3 |
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| 54 | and loc5 = loc3, loc5 |
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| 55 | mov ar.rsc = loc5 |
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| 94 | jermar | 56 | mov loc5 = ar.rnat |
| 100 | jermar | 57 | |
| 58 | .explicit |
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| 59 | |||
| 94 | jermar | 60 | mov loc6 = ar.lc |
| 61 | mov loc7 = ar.ec |
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| 62 | mov loc8 = ar.ccv |
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| 63 | mov loc9 = ar.csd |
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| 64 | mov loc10 = ar.ssd |
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| 59 | jermar | 65 | |
| 94 | jermar | 66 | /* |
| 67 | * Save application registers |
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| 68 | */ |
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| 83 | jermar | 69 | st8 [in0] = loc0, 8 ;; /* save ar.pfs */ |
| 70 | st8 [in0] = loc1, 8 ;; /* save ar.unat (caller) */ |
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| 71 | mov loc2 = in0 ;; |
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| 72 | add in0 = 8, in0 ;; /* skip ar.unat (callee) */ |
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| 94 | jermar | 73 | st8 [in0] = loc3, 8 ;; /* save ar.rsc */ |
| 74 | st8 [in0] = loc4, 8 ;; /* save ar.bsp */ |
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| 75 | st8 [in0] = loc5, 8 ;; /* save ar.rnat */ |
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| 76 | st8 [in0] = loc6, 8 ;; /* save ar.lc */ |
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| 77 | st8 [in0] = loc7, 8 ;; /* save ar.ec */ |
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| 78 | st8 [in0] = loc8, 8 ;; /* save ar.ccv */ |
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| 79 | st8 [in0] = loc9, 8 ;; /* save ar.csd */ |
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| 80 | st8 [in0] = loc10, 8 ;; /* save ar.ssd */ |
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| 83 | jermar | 81 | |
| 59 | jermar | 82 | /* |
| 83 | jermar | 83 | * Save general registers including NaT bits |
| 82 | jermar | 84 | */ |
| 83 | jermar | 85 | st8.spill [in0] = r1, 8 ;; |
| 86 | st8.spill [in0] = r2, 8 ;; |
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| 87 | st8.spill [in0] = r3, 8 ;; |
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| 88 | st8.spill [in0] = r4, 8 ;; |
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| 89 | st8.spill [in0] = r5, 8 ;; |
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| 90 | st8.spill [in0] = r6, 8 ;; |
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| 91 | st8.spill [in0] = r7, 8 ;; |
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| 92 | st8.spill [in0] = r8, 8 ;; |
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| 93 | st8.spill [in0] = r9, 8 ;; |
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| 94 | st8.spill [in0] = r10, 8 ;; |
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| 95 | st8.spill [in0] = r11, 8 ;; |
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| 96 | st8.spill [in0] = r12, 8 ;; /* save sp */ |
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| 97 | st8.spill [in0] = r13, 8 ;; |
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| 98 | st8.spill [in0] = r14, 8 ;; |
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| 99 | st8.spill [in0] = r15, 8 ;; |
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| 100 | st8.spill [in0] = r16, 8 ;; |
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| 101 | st8.spill [in0] = r17, 8 ;; |
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| 102 | st8.spill [in0] = r18, 8 ;; |
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| 103 | st8.spill [in0] = r19, 8 ;; |
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| 104 | st8.spill [in0] = r20, 8 ;; |
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| 105 | st8.spill [in0] = r21, 8 ;; |
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| 106 | st8.spill [in0] = r22, 8 ;; |
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| 107 | st8.spill [in0] = r23, 8 ;; |
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| 108 | st8.spill [in0] = r24, 8 ;; |
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| 109 | st8.spill [in0] = r25, 8 ;; |
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| 110 | st8.spill [in0] = r26, 8 ;; |
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| 111 | st8.spill [in0] = r27, 8 ;; |
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| 112 | st8.spill [in0] = r28, 8 ;; |
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| 113 | st8.spill [in0] = r29, 8 ;; |
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| 114 | st8.spill [in0] = r30, 8 ;; |
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| 115 | st8.spill [in0] = r31, 8 ;; |
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| 59 | jermar | 116 | |
| 83 | jermar | 117 | mov loc3 = ar.unat ;; |
| 118 | st8 [loc2] = loc3 /* save ar.unat (callee) */ |
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| 119 | |||
| 82 | jermar | 120 | /* |
| 121 | * Save branch registers |
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| 122 | */ |
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| 83 | jermar | 123 | mov loc2 = b0 ;; |
| 124 | st8 [in0] = loc2, 8 /* save pc */ |
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| 125 | mov loc3 = b1 ;; |
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| 82 | jermar | 126 | st8 [in0] = loc3, 8 |
| 83 | jermar | 127 | mov loc4 = b2 ;; |
| 82 | jermar | 128 | st8 [in0] = loc4, 8 |
| 83 | jermar | 129 | mov loc5 = b3 ;; |
| 82 | jermar | 130 | st8 [in0] = loc5, 8 |
| 83 | jermar | 131 | mov loc6 = b4 ;; |
| 82 | jermar | 132 | st8 [in0] = loc6, 8 |
| 83 | jermar | 133 | mov loc7 = b5 ;; |
| 82 | jermar | 134 | st8 [in0] = loc7, 8 |
| 83 | jermar | 135 | mov loc8 = b6 ;; |
| 82 | jermar | 136 | st8 [in0] = loc8, 8 |
| 83 | jermar | 137 | mov loc9 = b7 ;; |
| 138 | st8 [in0] = loc9, 8 |
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| 82 | jermar | 139 | |
| 140 | /* |
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| 141 | * Save predicate registers |
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| 142 | */ |
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| 83 | jermar | 143 | mov loc2 = pr ;; |
| 144 | st8 [in0] = loc2, 8 |
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| 59 | jermar | 145 | |
| 146 | mov ar.pfs = loc0 |
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| 83 | jermar | 147 | mov ar.unat = loc1 |
| 59 | jermar | 148 | |
| 149 | add r8 = r0, r0, 1 /* context_save returns 1 */ |
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| 60 | jermar | 150 | br.ret.sptk.many b0 |
| 55 | jermar | 151 | |
| 152 | context_restore: |
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| 94 | jermar | 153 | alloc loc0 = ar.pfs, 1, 11, 0, 0 ;; |
| 59 | jermar | 154 | |
| 94 | jermar | 155 | ld8 loc0 = [in0], 8 ;; /* load ar.pfs */ |
| 156 | ld8 loc1 = [in0], 8 ;; /* load ar.unat (caller) */ |
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| 157 | ld8 loc2 = [in0], 8 ;; /* load ar.unat (callee) */ |
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| 158 | ld8 loc3 = [in0], 8 ;; /* load ar.rsc */ |
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| 159 | ld8 loc4 = [in0], 8 ;; /* load ar.bsp */ |
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| 160 | ld8 loc5 = [in0], 8 ;; /* load ar.rnat */ |
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| 161 | ld8 loc6 = [in0], 8 ;; /* load ar.lc */ |
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| 162 | ld8 loc7 = [in0], 8 ;; /* load ar.ec */ |
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| 163 | ld8 loc8 = [in0], 8 ;; /* load ar.ccv */ |
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| 164 | ld8 loc9 = [in0], 8 ;; /* load ar.csd */ |
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| 165 | ld8 loc10 = [in0], 8 ;; /* load ar.ssd */ |
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| 166 | |||
| 100 | jermar | 167 | .auto |
| 168 | |||
| 59 | jermar | 169 | /* |
| 100 | jermar | 170 | * Invalidate the ALAT |
| 171 | */ |
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| 172 | invala |
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| 173 | |||
| 174 | /* |
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| 94 | jermar | 175 | * Restore application registers |
| 59 | jermar | 176 | */ |
| 100 | jermar | 177 | |
| 178 | mov ar.bspstore = loc4 |
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| 179 | mov ar.rnat = loc5 |
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| 180 | mov ar.pfs = loc0 |
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| 181 | mov ar.rsc = loc3 |
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| 182 | |||
| 183 | .explicit |
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| 184 | |||
| 83 | jermar | 185 | mov ar.unat = loc2 ;; |
| 94 | jermar | 186 | mov ar.lc = loc6 |
| 187 | mov ar.ec = loc7 |
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| 188 | mov ar.ccv = loc8 |
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| 189 | mov ar.csd = loc9 |
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| 190 | mov ar.ssd = loc10 |
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| 83 | jermar | 191 | |
| 82 | jermar | 192 | /* |
| 83 | jermar | 193 | * Restore general registers including NaT bits |
| 82 | jermar | 194 | */ |
| 83 | jermar | 195 | ld8.fill r1 = [in0], 8 ;; |
| 196 | ld8.fill r2 = [in0], 8 ;; |
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| 197 | ld8.fill r3 = [in0], 8 ;; |
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| 198 | ld8.fill r4 = [in0], 8 ;; |
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| 199 | ld8.fill r5 = [in0], 8 ;; |
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| 200 | ld8.fill r6 = [in0], 8 ;; |
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| 201 | ld8.fill r7 = [in0], 8 ;; |
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| 202 | ld8.fill r8 = [in0], 8 ;; |
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| 203 | ld8.fill r9 = [in0], 8 ;; |
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| 204 | ld8.fill r10 = [in0], 8 ;; |
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| 205 | ld8.fill r11 = [in0], 8 ;; |
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| 206 | ld8.fill r12 = [in0], 8 ;; /* restore sp */ |
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| 207 | ld8.fill r13 = [in0], 8 ;; |
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| 208 | ld8.fill r14 = [in0], 8 ;; |
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| 209 | ld8.fill r15 = [in0], 8 ;; |
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| 210 | ld8.fill r16 = [in0], 8 ;; |
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| 211 | ld8.fill r17 = [in0], 8 ;; |
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| 212 | ld8.fill r18 = [in0], 8 ;; |
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| 213 | ld8.fill r19 = [in0], 8 ;; |
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| 214 | ld8.fill r20 = [in0], 8 ;; |
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| 215 | ld8.fill r21 = [in0], 8 ;; |
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| 216 | ld8.fill r22 = [in0], 8 ;; |
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| 217 | ld8.fill r23 = [in0], 8 ;; |
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| 218 | ld8.fill r24 = [in0], 8 ;; |
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| 219 | ld8.fill r25 = [in0], 8 ;; |
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| 220 | ld8.fill r26 = [in0], 8 ;; |
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| 221 | ld8.fill r27 = [in0], 8 ;; |
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| 222 | ld8.fill r28 = [in0], 8 ;; |
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| 223 | ld8.fill r29 = [in0], 8 ;; |
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| 224 | ld8.fill r30 = [in0], 8 ;; |
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| 225 | ld8.fill r31 = [in0], 8 ;; |
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| 59 | jermar | 226 | |
| 82 | jermar | 227 | /* |
| 228 | * Restore branch registers |
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| 229 | */ |
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| 83 | jermar | 230 | ld8 loc2 = [in0], 8 ;; /* restore pc */ |
| 231 | mov b0 = loc2 |
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| 82 | jermar | 232 | ld8 loc3 = [in0], 8 ;; |
| 83 | jermar | 233 | mov b1 = loc3 |
| 82 | jermar | 234 | ld8 loc4 = [in0], 8 ;; |
| 83 | jermar | 235 | mov b2 = loc4 |
| 82 | jermar | 236 | ld8 loc5 = [in0], 8 ;; |
| 83 | jermar | 237 | mov b3 = loc5 |
| 82 | jermar | 238 | ld8 loc6 = [in0], 8 ;; |
| 83 | jermar | 239 | mov b4 = loc6 |
| 82 | jermar | 240 | ld8 loc7 = [in0], 8 ;; |
| 83 | jermar | 241 | mov b5 = loc7 |
| 82 | jermar | 242 | ld8 loc8 = [in0], 8 ;; |
| 83 | jermar | 243 | mov b6 = loc8 |
| 244 | ld8 loc9 = [in0], 8 ;; |
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| 245 | mov b7 = loc9 |
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| 82 | jermar | 246 | |
| 83 | jermar | 247 | /* |
| 248 | * Restore predicate registers |
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| 249 | */ |
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| 250 | ld8 loc2 = [in0], 8 ;; |
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| 251 | mov pr = loc2, ~0 |
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| 59 | jermar | 252 | |
| 83 | jermar | 253 | mov ar.unat = loc1 |
| 59 | jermar | 254 | |
| 255 | mov r8 = r0 /* context_restore returns 0 */ |
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| 60 | jermar | 256 | br.ret.sptk.many b0 |