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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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| 82 | jermar | 35 | alloc loc0 = ar.pfs, 1, 9, 0, 0 |
| 59 | jermar | 36 | |
| 37 | /* |
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| 38 | * TODO: save the rest of the context registers. |
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| 39 | */ |
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| 40 | |||
| 82 | jermar | 41 | /* |
| 42 | * Save general registers |
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| 43 | */ |
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| 59 | jermar | 44 | st8 [in0] = r1, 8 ;; |
| 45 | st8 [in0] = r2, 8 ;; |
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| 46 | st8 [in0] = r3, 8 ;; |
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| 47 | st8 [in0] = r4, 8 ;; |
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| 48 | st8 [in0] = r5, 8 ;; |
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| 49 | st8 [in0] = r6, 8 ;; |
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| 50 | st8 [in0] = r7, 8 ;; |
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| 51 | st8 [in0] = r8, 8 ;; |
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| 52 | st8 [in0] = r9, 8 ;; |
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| 53 | st8 [in0] = r10, 8 ;; |
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| 54 | st8 [in0] = r11, 8 ;; |
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| 55 | st8 [in0] = r12, 8 ;; /* save sp */ |
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| 56 | st8 [in0] = r13, 8 ;; |
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| 57 | st8 [in0] = r14, 8 ;; |
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| 58 | st8 [in0] = r15, 8 ;; |
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| 59 | st8 [in0] = r16, 8 ;; |
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| 60 | st8 [in0] = r17, 8 ;; |
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| 61 | st8 [in0] = r18, 8 ;; |
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| 62 | st8 [in0] = r19, 8 ;; |
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| 63 | st8 [in0] = r20, 8 ;; |
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| 64 | st8 [in0] = r21, 8 ;; |
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| 65 | st8 [in0] = r22, 8 ;; |
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| 66 | st8 [in0] = r23, 8 ;; |
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| 67 | st8 [in0] = r24, 8 ;; |
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| 68 | st8 [in0] = r25, 8 ;; |
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| 69 | st8 [in0] = r26, 8 ;; |
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| 70 | st8 [in0] = r27, 8 ;; |
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| 71 | st8 [in0] = r28, 8 ;; |
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| 72 | st8 [in0] = r29, 8 ;; |
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| 73 | st8 [in0] = r30, 8 ;; |
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| 74 | st8 [in0] = r31, 8 ;; |
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| 75 | |||
| 82 | jermar | 76 | /* |
| 77 | * Save branch registers |
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| 78 | */ |
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| 59 | jermar | 79 | mov loc1 = b0 ;; |
| 82 | jermar | 80 | st8 [in0] = loc1, 8 /* save pc */ |
| 81 | mov loc2 = b1 ;; |
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| 82 | st8 [in0] = loc2, 8 |
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| 83 | mov loc3 = b2 ;; |
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| 84 | st8 [in0] = loc3, 8 |
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| 85 | mov loc4 = b3 ;; |
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| 86 | st8 [in0] = loc4, 8 |
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| 87 | mov loc5 = b4 ;; |
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| 88 | st8 [in0] = loc5, 8 |
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| 89 | mov loc6 = b5 ;; |
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| 90 | st8 [in0] = loc6, 8 |
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| 91 | mov loc7 = b6 ;; |
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| 92 | st8 [in0] = loc7, 8 |
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| 93 | mov loc8 = b7 ;; |
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| 94 | st8 [in0] = loc8, 8 |
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| 95 | |||
| 96 | /* |
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| 97 | * Save predicate registers |
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| 98 | */ |
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| 99 | mov loc1 = pr ;; |
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| 59 | jermar | 100 | st8 [in0] = loc1, 8 |
| 101 | |||
| 102 | mov ar.pfs = loc0 |
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| 103 | |||
| 104 | add r8 = r0, r0, 1 /* context_save returns 1 */ |
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| 60 | jermar | 105 | br.ret.sptk.many b0 |
| 55 | jermar | 106 | |
| 107 | context_restore: |
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| 82 | jermar | 108 | alloc loc0 = ar.pfs, 1, 9, 0, 0 |
| 59 | jermar | 109 | |
| 110 | /* |
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| 111 | * TODO: restore the rest of the context registers. |
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| 112 | */ |
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| 113 | |||
| 82 | jermar | 114 | /* |
| 115 | * Restore general registers |
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| 116 | */ |
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| 59 | jermar | 117 | ld8 r1 = [in0], 8 ;; |
| 118 | ld8 r2 = [in0], 8 ;; |
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| 119 | ld8 r3 = [in0], 8 ;; |
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| 120 | ld8 r4 = [in0], 8 ;; |
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| 121 | ld8 r5 = [in0], 8 ;; |
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| 122 | ld8 r6 = [in0], 8 ;; |
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| 123 | ld8 r7 = [in0], 8 ;; |
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| 124 | ld8 r8 = [in0], 8 ;; |
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| 125 | ld8 r9 = [in0], 8 ;; |
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| 126 | ld8 r10 = [in0], 8 ;; |
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| 127 | ld8 r11 = [in0], 8 ;; |
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| 128 | ld8 r12 = [in0], 8 ;; /* restore sp */ |
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| 129 | ld8 r13 = [in0], 8 ;; |
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| 130 | ld8 r14 = [in0], 8 ;; |
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| 131 | ld8 r15 = [in0], 8 ;; |
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| 132 | ld8 r16 = [in0], 8 ;; |
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| 133 | ld8 r17 = [in0], 8 ;; |
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| 134 | ld8 r18 = [in0], 8 ;; |
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| 135 | ld8 r19 = [in0], 8 ;; |
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| 136 | ld8 r20 = [in0], 8 ;; |
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| 137 | ld8 r21 = [in0], 8 ;; |
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| 138 | ld8 r22 = [in0], 8 ;; |
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| 139 | ld8 r23 = [in0], 8 ;; |
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| 140 | ld8 r24 = [in0], 8 ;; |
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| 141 | ld8 r25 = [in0], 8 ;; |
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| 142 | ld8 r26 = [in0], 8 ;; |
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| 143 | ld8 r27 = [in0], 8 ;; |
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| 144 | ld8 r28 = [in0], 8 ;; |
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| 145 | ld8 r29 = [in0], 8 ;; |
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| 146 | ld8 r30 = [in0], 8 ;; |
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| 147 | ld8 r31 = [in0], 8 ;; |
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| 148 | |||
| 82 | jermar | 149 | /* |
| 150 | * Restore branch registers |
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| 151 | */ |
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| 152 | ld8 loc1 = [in0], 8 ;; /* restore pc */ |
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| 153 | mov b0 = loc1 |
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| 154 | ld8 loc2 = [in0], 8 ;; |
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| 155 | mov b1 = loc2 |
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| 156 | ld8 loc3 = [in0], 8 ;; |
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| 157 | mov b2 = loc3 |
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| 158 | ld8 loc4 = [in0], 8 ;; |
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| 159 | mov b3 = loc4 |
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| 160 | ld8 loc5 = [in0], 8 ;; |
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| 161 | mov b4 = loc5 |
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| 162 | ld8 loc6 = [in0], 8 ;; |
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| 163 | mov b5 = loc6 |
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| 164 | ld8 loc7 = [in0], 8 ;; |
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| 165 | mov b6 = loc7 |
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| 166 | ld8 loc8 = [in0], 8 ;; |
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| 167 | mov b7 = loc8 |
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| 168 | |||
| 59 | jermar | 169 | ld8 loc1 = [in0], 8 ;; |
| 82 | jermar | 170 | mov pr = loc1, ~0 |
| 59 | jermar | 171 | |
| 172 | mov ar.pfs = loc0 |
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| 173 | |||
| 174 | mov r8 = r0 /* context_restore returns 0 */ |
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| 60 | jermar | 175 | br.ret.sptk.many b0 |