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| 1160 | decky | 1 | # |
| 2 | # Copyright (C) 2006 Martin Decky |
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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 | #include <arch/asm/regname.h> |
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| 30 | |||
| 31 | .text |
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| 32 | |||
| 33 | .global iret |
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| 34 | .global memsetb |
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| 35 | .global memcpy |
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| 36 | |||
| 37 | iret: |
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| 38 | lwz r3, 144(sp) |
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| 39 | mtxer r3 |
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| 40 | |||
| 41 | lwz r3, 140(sp) |
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| 42 | mtctr r3 |
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| 43 | |||
| 44 | lwz r3, 136(sp) |
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| 45 | mtcr r3 |
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| 46 | |||
| 47 | lwz r3, 132(sp) |
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| 48 | mtlr r3 |
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| 49 | |||
| 50 | lwz r3, 128(sp) |
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| 51 | mtspr srr1, r3 |
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| 52 | |||
| 53 | lwz r3, 124(sp) |
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| 54 | mtspr srr0, r3 |
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| 55 | |||
| 56 | lwz r0, 0(sp) |
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| 57 | lwz r2, 4(sp) |
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| 58 | lwz r3, 8(sp) |
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| 59 | lwz r4, 12(sp) |
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| 60 | lwz r5, 16(sp) |
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| 61 | lwz r6, 20(sp) |
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| 62 | lwz r7, 24(sp) |
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| 63 | lwz r8, 28(sp) |
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| 64 | lwz r9, 32(sp) |
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| 65 | lwz r10, 36(sp) |
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| 66 | lwz r11, 40(sp) |
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| 67 | lwz r12, 44(sp) |
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| 68 | lwz r13, 48(sp) |
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| 69 | lwz r14, 52(sp) |
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| 70 | lwz r15, 56(sp) |
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| 71 | lwz r16, 60(sp) |
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| 72 | lwz r17, 64(sp) |
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| 73 | lwz r18, 68(sp) |
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| 74 | lwz r19, 72(sp) |
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| 75 | lwz r20, 76(sp) |
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| 76 | lwz r21, 80(sp) |
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| 77 | lwz r22, 84(sp) |
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| 78 | lwz r23, 88(sp) |
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| 79 | lwz r24, 92(sp) |
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| 80 | lwz r25, 96(sp) |
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| 81 | lwz r26, 100(sp) |
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| 82 | lwz r27, 104(sp) |
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| 83 | lwz r28, 108(sp) |
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| 84 | lwz r29, 112(sp) |
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| 85 | lwz r30, 116(sp) |
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| 86 | lwz r31, 120(sp) |
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| 87 | |||
| 88 | mfspr sp, sprg1 |
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| 89 | |||
| 90 | rfi |
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| 91 | |||
| 92 | memsetb: |
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| 93 | rlwimi r5, r5, 8, 16, 23 |
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| 94 | rlwimi r5, r5, 16, 0, 15 |
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| 95 | |||
| 96 | addi r14, r3, -4 |
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| 97 | |||
| 98 | cmplwi 0, r4, 4 |
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| 99 | blt 7f |
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| 100 | |||
| 101 | stwu r5, 4(r14) |
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| 102 | beqlr |
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| 103 | |||
| 104 | andi. r15, r14, 3 |
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| 105 | add r4, r15, r4 |
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| 106 | subf r14, r15, r14 |
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| 107 | srwi r15, r4, 2 |
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| 108 | mtctr r15 |
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| 109 | |||
| 110 | bdz 6f |
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| 111 | |||
| 112 | 1: |
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| 113 | stwu r5, 4(r14) |
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| 114 | bdnz 1b |
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| 115 | |||
| 116 | 6: |
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| 117 | |||
| 118 | andi. r4, r4, 3 |
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| 119 | |||
| 120 | 7: |
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| 121 | |||
| 122 | cmpwi 0, r4, 0 |
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| 123 | beqlr |
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| 124 | |||
| 125 | mtctr r4 |
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| 126 | addi r6, r6, 3 |
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| 127 | |||
| 128 | 8: |
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| 129 | |||
| 130 | stbu r5, 1(r14) |
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| 131 | bdnz 8b |
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| 132 | |||
| 133 | blr |
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| 134 | |||
| 135 | memcpy: |
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| 136 | srwi. r7, r5, 3 |
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| 137 | addi r6, r3, -4 |
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| 138 | addi r4, r4, -4 |
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| 139 | beq 2f |
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| 140 | |||
| 141 | andi. r0, r6, 3 |
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| 142 | mtctr r7 |
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| 143 | bne 5f |
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| 144 | |||
| 145 | 1: |
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| 146 | |||
| 147 | lwz r7, 4(r4) |
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| 148 | lwzu r8, 8(r4) |
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| 149 | stw r7, 4(r6) |
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| 150 | stwu r8, 8(r6) |
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| 151 | bdnz 1b |
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| 152 | |||
| 153 | andi. r5, r5, 7 |
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| 154 | |||
| 155 | 2: |
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| 156 | |||
| 157 | cmplwi 0, r5, 4 |
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| 158 | blt 3f |
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| 159 | |||
| 160 | lwzu r0, 4(r4) |
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| 161 | addi r5, r5, -4 |
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| 162 | stwu r0, 4(r6) |
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| 163 | |||
| 164 | 3: |
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| 165 | |||
| 166 | cmpwi 0, r5, 0 |
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| 167 | beqlr |
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| 168 | mtctr r5 |
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| 169 | addi r4, r4, 3 |
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| 170 | addi r6, r6, 3 |
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| 171 | |||
| 172 | 4: |
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| 173 | |||
| 174 | lbzu r0, 1(r4) |
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| 175 | stbu r0, 1(r6) |
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| 176 | bdnz 4b |
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| 177 | blr |
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| 178 | |||
| 179 | 5: |
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| 180 | |||
| 181 | subfic r0, r0, 4 |
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| 182 | mtctr r0 |
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| 183 | |||
| 184 | 6: |
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| 185 | |||
| 186 | lbz r7, 4(r4) |
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| 187 | addi r4, r4, 1 |
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| 188 | stb r7, 4(r6) |
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| 189 | addi r6, r6, 1 |
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| 190 | bdnz 6b |
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| 191 | subf r5, r0, r5 |
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| 192 | rlwinm. r7, r5, 32-3, 3, 31 |
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| 193 | beq 2b |
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| 194 | mtctr r7 |
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| 195 | b 1b |