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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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59 | jermar | 35 | alloc loc0 = ar.pfs, 1, 2, 0, 0 |
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 | |||
41 | st8 [in0] = r1, 8 ;; |
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42 | st8 [in0] = r2, 8 ;; |
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43 | st8 [in0] = r3, 8 ;; |
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44 | st8 [in0] = r4, 8 ;; |
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45 | st8 [in0] = r5, 8 ;; |
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46 | st8 [in0] = r6, 8 ;; |
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47 | st8 [in0] = r7, 8 ;; |
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48 | st8 [in0] = r8, 8 ;; |
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49 | st8 [in0] = r9, 8 ;; |
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50 | st8 [in0] = r10, 8 ;; |
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51 | st8 [in0] = r11, 8 ;; |
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52 | st8 [in0] = r12, 8 ;; /* save sp */ |
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53 | st8 [in0] = r13, 8 ;; |
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54 | st8 [in0] = r14, 8 ;; |
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55 | st8 [in0] = r15, 8 ;; |
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56 | st8 [in0] = r16, 8 ;; |
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57 | st8 [in0] = r17, 8 ;; |
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58 | st8 [in0] = r18, 8 ;; |
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59 | st8 [in0] = r19, 8 ;; |
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60 | st8 [in0] = r20, 8 ;; |
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61 | st8 [in0] = r21, 8 ;; |
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62 | st8 [in0] = r22, 8 ;; |
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63 | st8 [in0] = r23, 8 ;; |
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64 | st8 [in0] = r24, 8 ;; |
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65 | st8 [in0] = r25, 8 ;; |
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66 | st8 [in0] = r26, 8 ;; |
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67 | st8 [in0] = r27, 8 ;; |
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68 | st8 [in0] = r28, 8 ;; |
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69 | st8 [in0] = r29, 8 ;; |
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70 | st8 [in0] = r30, 8 ;; |
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71 | st8 [in0] = r31, 8 ;; |
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72 | |||
73 | /* save pc */ |
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74 | mov loc1 = b0 ;; |
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75 | st8 [in0] = loc1, 8 |
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76 | |||
77 | mov ar.pfs = loc0 |
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78 | |||
79 | add r8 = r0, r0, 1 /* context_save returns 1 */ |
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55 | jermar | 80 | br.ret.sptk.many rp |
81 | |||
82 | context_restore: |
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59 | jermar | 83 | alloc loc0 = ar.pfs, 1, 2, 0, 0 |
84 | |||
85 | /* |
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86 | * TODO: restore the rest of the context registers. |
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87 | */ |
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88 | |||
89 | ld8 r1 = [in0], 8 ;; |
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90 | ld8 r2 = [in0], 8 ;; |
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91 | ld8 r3 = [in0], 8 ;; |
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92 | ld8 r4 = [in0], 8 ;; |
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93 | ld8 r5 = [in0], 8 ;; |
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94 | ld8 r6 = [in0], 8 ;; |
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95 | ld8 r7 = [in0], 8 ;; |
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96 | ld8 r8 = [in0], 8 ;; |
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97 | ld8 r9 = [in0], 8 ;; |
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98 | ld8 r10 = [in0], 8 ;; |
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99 | ld8 r11 = [in0], 8 ;; |
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100 | ld8 r12 = [in0], 8 ;; /* restore sp */ |
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101 | ld8 r13 = [in0], 8 ;; |
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102 | ld8 r14 = [in0], 8 ;; |
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103 | ld8 r15 = [in0], 8 ;; |
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104 | ld8 r16 = [in0], 8 ;; |
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105 | ld8 r17 = [in0], 8 ;; |
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106 | ld8 r18 = [in0], 8 ;; |
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107 | ld8 r19 = [in0], 8 ;; |
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108 | ld8 r20 = [in0], 8 ;; |
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109 | ld8 r21 = [in0], 8 ;; |
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110 | ld8 r22 = [in0], 8 ;; |
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111 | ld8 r23 = [in0], 8 ;; |
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112 | ld8 r24 = [in0], 8 ;; |
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113 | ld8 r25 = [in0], 8 ;; |
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114 | ld8 r26 = [in0], 8 ;; |
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115 | ld8 r27 = [in0], 8 ;; |
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116 | ld8 r28 = [in0], 8 ;; |
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117 | ld8 r29 = [in0], 8 ;; |
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118 | ld8 r30 = [in0], 8 ;; |
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119 | ld8 r31 = [in0], 8 ;; |
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120 | |||
121 | /* restore pc */ |
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122 | ld8 loc1 = [in0], 8 ;; |
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123 | mov b0 = loc1 |
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124 | |||
125 | mov ar.pfs = loc0 |
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126 | |||
127 | mov r8 = r0 /* context_restore returns 0 */ |
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128 | br.ret.sptk.many rp |