| 1 | #
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| 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 |
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| 29 | #include <arch/asm/regname.h>
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| 30 |
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| 31 | .text
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| 32 |
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| 33 | .global iret
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| 34 | .global memsetb
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| 35 | .global memcpy
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| 36 |
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| 37 | iret:
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| 38 | lwz r3, 144(sp)
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| 39 | mtxer r3
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| 40 |
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| 41 | lwz r3, 140(sp)
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| 42 | mtctr r3
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| 43 |
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| 44 | lwz r3, 136(sp)
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| 45 | mtcr r3
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| 46 |
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| 47 | lwz r3, 132(sp)
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| 48 | mtlr r3
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| 49 |
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| 50 | lwz r3, 128(sp)
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| 51 | mtspr srr1, r3
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| 52 |
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| 53 | lwz r3, 124(sp)
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| 54 | mtspr srr0, r3
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| 55 |
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| 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 |
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| 88 | mfspr sp, sprg1
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| 89 |
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| 90 | rfi
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| 91 |
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| 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 |
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| 96 | addi r14, r3, -4
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| 97 |
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| 98 | cmplwi 0, r4, 4
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| 99 | blt 7f
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| 100 |
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| 101 | stwu r5, 4(r14)
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| 102 | beqlr
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| 103 |
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| 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 |
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| 110 | bdz 6f
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| 111 |
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| 112 | 1:
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| 113 | stwu r5, 4(r14)
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| 114 | bdnz 1b
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| 115 |
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| 116 | 6:
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| 117 |
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| 118 | andi. r4, r4, 3
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| 119 |
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| 120 | 7:
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| 121 |
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| 122 | cmpwi 0, r4, 0
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| 123 | beqlr
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| 124 |
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| 125 | mtctr r4
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| 126 | addi r6, r6, 3
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| 127 |
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| 128 | 8:
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| 129 |
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| 130 | stbu r5, 1(r14)
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| 131 | bdnz 8b
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| 132 |
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| 133 | blr
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| 134 |
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| 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 |
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| 141 | andi. r0, r6, 3
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| 142 | mtctr r7
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| 143 | bne 5f
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| 144 |
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| 145 | 1:
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| 146 |
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| 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 |
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| 153 | andi. r5, r5, 7
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| 154 |
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| 155 | 2:
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| 156 |
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| 157 | cmplwi 0, r5, 4
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| 158 | blt 3f
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| 159 |
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| 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 |
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| 164 | 3:
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| 165 |
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| 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 |
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| 172 | 4:
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| 173 |
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| 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 |
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| 179 | 5:
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| 180 |
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| 181 | subfic r0, r0, 4
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| 182 | mtctr r0
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| 183 |
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| 184 | 6:
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| 185 |
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| 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
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