| 1 | /* |
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| 2 | * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> |
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| 3 | * Copyright (C) 2008-2009 PetaLogix |
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| 4 | * Copyright (C) 2008 Jim Law - Iris LP All rights reserved. |
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| 5 | * |
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| 6 | * This file is subject to the terms and conditions of the GNU General |
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| 7 | * Public License. See the file COPYING in the main directory of this |
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| 8 | * archive for more details. |
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| 9 | * |
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| 10 | * Written by Jim Law <jlaw@irispower.com> |
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| 11 | * |
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| 12 | * intended to replace: |
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| 13 | * memcpy in memcpy.c and |
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| 14 | * memmove in memmove.c |
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| 15 | * ... in arch/microblaze/lib |
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| 16 | * |
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| 17 | * |
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| 18 | * assly_fastcopy.S |
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| 19 | * |
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| 20 | * Attempt at quicker memcpy and memmove for MicroBlaze |
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| 21 | * Input : Operand1 in Reg r5 - destination address |
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| 22 | * Operand2 in Reg r6 - source address |
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| 23 | * Operand3 in Reg r7 - number of bytes to transfer |
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| 24 | * Output: Result in Reg r3 - starting destinaition address |
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| 25 | * |
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| 26 | * |
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| 27 | * Explanation: |
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| 28 | * Perform (possibly unaligned) copy of a block of memory |
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| 29 | * between mem locations with size of xfer spec'd in bytes |
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| 30 | */ |
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| 31 | |
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| 32 | #include <linux/linkage.h> |
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| 33 | .text |
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| 34 | .globl memcpy |
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| 35 | .type memcpy, @function |
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| 36 | .ent memcpy |
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| 37 | |
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| 38 | memcpy: |
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| 39 | fast_memcpy_ascending: |
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| 40 | /* move d to return register as value of function */ |
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| 41 | addi r3, r5, 0 |
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| 42 | |
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| 43 | addi r4, r0, 4 /* n = 4 */ |
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| 44 | cmpu r4, r4, r7 /* n = c - n (unsigned) */ |
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| 45 | blti r4, a_xfer_end /* if n < 0, less than one word to transfer */ |
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| 46 | |
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| 47 | /* transfer first 0~3 bytes to get aligned dest address */ |
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| 48 | andi r4, r5, 3 /* n = d & 3 */ |
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| 49 | /* if zero, destination already aligned */ |
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| 50 | beqi r4, a_dalign_done |
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| 51 | /* n = 4 - n (yields 3, 2, 1 transfers for 1, 2, 3 addr offset) */ |
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| 52 | rsubi r4, r4, 4 |
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| 53 | rsub r7, r4, r7 /* c = c - n adjust c */ |
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| 54 | |
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| 55 | a_xfer_first_loop: |
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| 56 | /* if no bytes left to transfer, transfer the bulk */ |
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| 57 | beqi r4, a_dalign_done |
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| 58 | lbui r11, r6, 0 /* h = *s */ |
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| 59 | sbi r11, r5, 0 /* *d = h */ |
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| 60 | addi r6, r6, 1 /* s++ */ |
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| 61 | addi r5, r5, 1 /* d++ */ |
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| 62 | brid a_xfer_first_loop /* loop */ |
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| 63 | addi r4, r4, -1 /* n-- (IN DELAY SLOT) */ |
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| 64 | |
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| 65 | a_dalign_done: |
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| 66 | addi r4, r0, 32 /* n = 32 */ |
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| 67 | cmpu r4, r4, r7 /* n = c - n (unsigned) */ |
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| 68 | /* if n < 0, less than one block to transfer */ |
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| 69 | blti r4, a_block_done |
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| 70 | |
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| 71 | a_block_xfer: |
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| 72 | andi r4, r7, 0xffffffe0 /* n = c & ~31 */ |
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| 73 | rsub r7, r4, r7 /* c = c - n */ |
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| 74 | |
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| 75 | andi r9, r6, 3 /* t1 = s & 3 */ |
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| 76 | /* if temp != 0, unaligned transfers needed */ |
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| 77 | bnei r9, a_block_unaligned |
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| 78 | |
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| 79 | a_block_aligned: |
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| 80 | lwi r9, r6, 0 /* t1 = *(s + 0) */ |
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| 81 | lwi r10, r6, 4 /* t2 = *(s + 4) */ |
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| 82 | lwi r11, r6, 8 /* t3 = *(s + 8) */ |
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| 83 | lwi r12, r6, 12 /* t4 = *(s + 12) */ |
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| 84 | swi r9, r5, 0 /* *(d + 0) = t1 */ |
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| 85 | swi r10, r5, 4 /* *(d + 4) = t2 */ |
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| 86 | swi r11, r5, 8 /* *(d + 8) = t3 */ |
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| 87 | swi r12, r5, 12 /* *(d + 12) = t4 */ |
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| 88 | lwi r9, r6, 16 /* t1 = *(s + 16) */ |
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| 89 | lwi r10, r6, 20 /* t2 = *(s + 20) */ |
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| 90 | lwi r11, r6, 24 /* t3 = *(s + 24) */ |
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| 91 | lwi r12, r6, 28 /* t4 = *(s + 28) */ |
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| 92 | swi r9, r5, 16 /* *(d + 16) = t1 */ |
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| 93 | swi r10, r5, 20 /* *(d + 20) = t2 */ |
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| 94 | swi r11, r5, 24 /* *(d + 24) = t3 */ |
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| 95 | swi r12, r5, 28 /* *(d + 28) = t4 */ |
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| 96 | addi r6, r6, 32 /* s = s + 32 */ |
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| 97 | addi r4, r4, -32 /* n = n - 32 */ |
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| 98 | bneid r4, a_block_aligned /* while (n) loop */ |
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| 99 | addi r5, r5, 32 /* d = d + 32 (IN DELAY SLOT) */ |
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| 100 | bri a_block_done |
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| 101 | |
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| 102 | a_block_unaligned: |
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| 103 | andi r8, r6, 0xfffffffc /* as = s & ~3 */ |
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| 104 | add r6, r6, r4 /* s = s + n */ |
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| 105 | lwi r11, r8, 0 /* h = *(as + 0) */ |
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| 106 | |
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| 107 | addi r9, r9, -1 |
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| 108 | beqi r9, a_block_u1 /* t1 was 1 => 1 byte offset */ |
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| 109 | addi r9, r9, -1 |
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| 110 | beqi r9, a_block_u2 /* t1 was 2 => 2 byte offset */ |
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| 111 | |
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| 112 | a_block_u3: |
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| 113 | bslli r11, r11, 24 /* h = h << 24 */ |
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| 114 | a_bu3_loop: |
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| 115 | lwi r12, r8, 4 /* v = *(as + 4) */ |
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| 116 | bsrli r9, r12, 8 /* t1 = v >> 8 */ |
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| 117 | or r9, r11, r9 /* t1 = h | t1 */ |
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| 118 | swi r9, r5, 0 /* *(d + 0) = t1 */ |
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| 119 | bslli r11, r12, 24 /* h = v << 24 */ |
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| 120 | lwi r12, r8, 8 /* v = *(as + 8) */ |
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| 121 | bsrli r9, r12, 8 /* t1 = v >> 8 */ |
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| 122 | or r9, r11, r9 /* t1 = h | t1 */ |
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| 123 | swi r9, r5, 4 /* *(d + 4) = t1 */ |
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| 124 | bslli r11, r12, 24 /* h = v << 24 */ |
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| 125 | lwi r12, r8, 12 /* v = *(as + 12) */ |
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| 126 | bsrli r9, r12, 8 /* t1 = v >> 8 */ |
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| 127 | or r9, r11, r9 /* t1 = h | t1 */ |
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| 128 | swi r9, r5, 8 /* *(d + 8) = t1 */ |
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| 129 | bslli r11, r12, 24 /* h = v << 24 */ |
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| 130 | lwi r12, r8, 16 /* v = *(as + 16) */ |
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| 131 | bsrli r9, r12, 8 /* t1 = v >> 8 */ |
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| 132 | or r9, r11, r9 /* t1 = h | t1 */ |
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| 133 | swi r9, r5, 12 /* *(d + 12) = t1 */ |
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| 134 | bslli r11, r12, 24 /* h = v << 24 */ |
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| 135 | lwi r12, r8, 20 /* v = *(as + 20) */ |
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| 136 | bsrli r9, r12, 8 /* t1 = v >> 8 */ |
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| 137 | or r9, r11, r9 /* t1 = h | t1 */ |
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| 138 | swi r9, r5, 16 /* *(d + 16) = t1 */ |
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| 139 | bslli r11, r12, 24 /* h = v << 24 */ |
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| 140 | lwi r12, r8, 24 /* v = *(as + 24) */ |
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| 141 | bsrli r9, r12, 8 /* t1 = v >> 8 */ |
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| 142 | or r9, r11, r9 /* t1 = h | t1 */ |
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| 143 | swi r9, r5, 20 /* *(d + 20) = t1 */ |
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| 144 | bslli r11, r12, 24 /* h = v << 24 */ |
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| 145 | lwi r12, r8, 28 /* v = *(as + 28) */ |
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| 146 | bsrli r9, r12, 8 /* t1 = v >> 8 */ |
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| 147 | or r9, r11, r9 /* t1 = h | t1 */ |
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| 148 | swi r9, r5, 24 /* *(d + 24) = t1 */ |
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| 149 | bslli r11, r12, 24 /* h = v << 24 */ |
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| 150 | lwi r12, r8, 32 /* v = *(as + 32) */ |
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| 151 | bsrli r9, r12, 8 /* t1 = v >> 8 */ |
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| 152 | or r9, r11, r9 /* t1 = h | t1 */ |
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| 153 | swi r9, r5, 28 /* *(d + 28) = t1 */ |
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| 154 | bslli r11, r12, 24 /* h = v << 24 */ |
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| 155 | addi r8, r8, 32 /* as = as + 32 */ |
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| 156 | addi r4, r4, -32 /* n = n - 32 */ |
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| 157 | bneid r4, a_bu3_loop /* while (n) loop */ |
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| 158 | addi r5, r5, 32 /* d = d + 32 (IN DELAY SLOT) */ |
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| 159 | bri a_block_done |
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| 160 | |
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| 161 | a_block_u1: |
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| 162 | bslli r11, r11, 8 /* h = h << 8 */ |
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| 163 | a_bu1_loop: |
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| 164 | lwi r12, r8, 4 /* v = *(as + 4) */ |
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| 165 | bsrli r9, r12, 24 /* t1 = v >> 24 */ |
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| 166 | or r9, r11, r9 /* t1 = h | t1 */ |
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| 167 | swi r9, r5, 0 /* *(d + 0) = t1 */ |
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| 168 | bslli r11, r12, 8 /* h = v << 8 */ |
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| 169 | lwi r12, r8, 8 /* v = *(as + 8) */ |
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| 170 | bsrli r9, r12, 24 /* t1 = v >> 24 */ |
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| 171 | or r9, r11, r9 /* t1 = h | t1 */ |
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| 172 | swi r9, r5, 4 /* *(d + 4) = t1 */ |
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| 173 | bslli r11, r12, 8 /* h = v << 8 */ |
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| 174 | lwi r12, r8, 12 /* v = *(as + 12) */ |
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| 175 | bsrli r9, r12, 24 /* t1 = v >> 24 */ |
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| 176 | or r9, r11, r9 /* t1 = h | t1 */ |
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| 177 | swi r9, r5, 8 /* *(d + 8) = t1 */ |
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| 178 | bslli r11, r12, 8 /* h = v << 8 */ |
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| 179 | lwi r12, r8, 16 /* v = *(as + 16) */ |
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| 180 | bsrli r9, r12, 24 /* t1 = v >> 24 */ |
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| 181 | or r9, r11, r9 /* t1 = h | t1 */ |
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| 182 | swi r9, r5, 12 /* *(d + 12) = t1 */ |
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| 183 | bslli r11, r12, 8 /* h = v << 8 */ |
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| 184 | lwi r12, r8, 20 /* v = *(as + 20) */ |
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| 185 | bsrli r9, r12, 24 /* t1 = v >> 24 */ |
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| 186 | or r9, r11, r9 /* t1 = h | t1 */ |
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| 187 | swi r9, r5, 16 /* *(d + 16) = t1 */ |
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| 188 | bslli r11, r12, 8 /* h = v << 8 */ |
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| 189 | lwi r12, r8, 24 /* v = *(as + 24) */ |
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| 190 | bsrli r9, r12, 24 /* t1 = v >> 24 */ |
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| 191 | or r9, r11, r9 /* t1 = h | t1 */ |
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| 192 | swi r9, r5, 20 /* *(d + 20) = t1 */ |
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| 193 | bslli r11, r12, 8 /* h = v << 8 */ |
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| 194 | lwi r12, r8, 28 /* v = *(as + 28) */ |
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| 195 | bsrli r9, r12, 24 /* t1 = v >> 24 */ |
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| 196 | or r9, r11, r9 /* t1 = h | t1 */ |
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| 197 | swi r9, r5, 24 /* *(d + 24) = t1 */ |
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| 198 | bslli r11, r12, 8 /* h = v << 8 */ |
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| 199 | lwi r12, r8, 32 /* v = *(as + 32) */ |
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| 200 | bsrli r9, r12, 24 /* t1 = v >> 24 */ |
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| 201 | or r9, r11, r9 /* t1 = h | t1 */ |
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| 202 | swi r9, r5, 28 /* *(d + 28) = t1 */ |
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| 203 | bslli r11, r12, 8 /* h = v << 8 */ |
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| 204 | addi r8, r8, 32 /* as = as + 32 */ |
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| 205 | addi r4, r4, -32 /* n = n - 32 */ |
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| 206 | bneid r4, a_bu1_loop /* while (n) loop */ |
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| 207 | addi r5, r5, 32 /* d = d + 32 (IN DELAY SLOT) */ |
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| 208 | bri a_block_done |
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| 209 | |
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| 210 | a_block_u2: |
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| 211 | bslli r11, r11, 16 /* h = h << 16 */ |
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| 212 | a_bu2_loop: |
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| 213 | lwi r12, r8, 4 /* v = *(as + 4) */ |
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| 214 | bsrli r9, r12, 16 /* t1 = v >> 16 */ |
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| 215 | or r9, r11, r9 /* t1 = h | t1 */ |
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| 216 | swi r9, r5, 0 /* *(d + 0) = t1 */ |
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| 217 | bslli r11, r12, 16 /* h = v << 16 */ |
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| 218 | lwi r12, r8, 8 /* v = *(as + 8) */ |
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| 219 | bsrli r9, r12, 16 /* t1 = v >> 16 */ |
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| 220 | or r9, r11, r9 /* t1 = h | t1 */ |
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| 221 | swi r9, r5, 4 /* *(d + 4) = t1 */ |
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| 222 | bslli r11, r12, 16 /* h = v << 16 */ |
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| 223 | lwi r12, r8, 12 /* v = *(as + 12) */ |
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| 224 | bsrli r9, r12, 16 /* t1 = v >> 16 */ |
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| 225 | or r9, r11, r9 /* t1 = h | t1 */ |
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| 226 | swi r9, r5, 8 /* *(d + 8) = t1 */ |
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| 227 | bslli r11, r12, 16 /* h = v << 16 */ |
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| 228 | lwi r12, r8, 16 /* v = *(as + 16) */ |
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| 229 | bsrli r9, r12, 16 /* t1 = v >> 16 */ |
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| 230 | or r9, r11, r9 /* t1 = h | t1 */ |
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| 231 | swi r9, r5, 12 /* *(d + 12) = t1 */ |
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| 232 | bslli r11, r12, 16 /* h = v << 16 */ |
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| 233 | lwi r12, r8, 20 /* v = *(as + 20) */ |
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| 234 | bsrli r9, r12, 16 /* t1 = v >> 16 */ |
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| 235 | or r9, r11, r9 /* t1 = h | t1 */ |
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| 236 | swi r9, r5, 16 /* *(d + 16) = t1 */ |
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| 237 | bslli r11, r12, 16 /* h = v << 16 */ |
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| 238 | lwi r12, r8, 24 /* v = *(as + 24) */ |
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| 239 | bsrli r9, r12, 16 /* t1 = v >> 16 */ |
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| 240 | or r9, r11, r9 /* t1 = h | t1 */ |
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| 241 | swi r9, r5, 20 /* *(d + 20) = t1 */ |
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| 242 | bslli r11, r12, 16 /* h = v << 16 */ |
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| 243 | lwi r12, r8, 28 /* v = *(as + 28) */ |
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| 244 | bsrli r9, r12, 16 /* t1 = v >> 16 */ |
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| 245 | or r9, r11, r9 /* t1 = h | t1 */ |
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| 246 | swi r9, r5, 24 /* *(d + 24) = t1 */ |
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| 247 | bslli r11, r12, 16 /* h = v << 16 */ |
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| 248 | lwi r12, r8, 32 /* v = *(as + 32) */ |
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| 249 | bsrli r9, r12, 16 /* t1 = v >> 16 */ |
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| 250 | or r9, r11, r9 /* t1 = h | t1 */ |
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| 251 | swi r9, r5, 28 /* *(d + 28) = t1 */ |
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| 252 | bslli r11, r12, 16 /* h = v << 16 */ |
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| 253 | addi r8, r8, 32 /* as = as + 32 */ |
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| 254 | addi r4, r4, -32 /* n = n - 32 */ |
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| 255 | bneid r4, a_bu2_loop /* while (n) loop */ |
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| 256 | addi r5, r5, 32 /* d = d + 32 (IN DELAY SLOT) */ |
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| 257 | |
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| 258 | a_block_done: |
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| 259 | addi r4, r0, 4 /* n = 4 */ |
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| 260 | cmpu r4, r4, r7 /* n = c - n (unsigned) */ |
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| 261 | blti r4, a_xfer_end /* if n < 0, less than one word to transfer */ |
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| 262 | |
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| 263 | a_word_xfer: |
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| 264 | andi r4, r7, 0xfffffffc /* n = c & ~3 */ |
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| 265 | addi r10, r0, 0 /* offset = 0 */ |
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| 266 | |
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| 267 | andi r9, r6, 3 /* t1 = s & 3 */ |
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| 268 | /* if temp != 0, unaligned transfers needed */ |
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| 269 | bnei r9, a_word_unaligned |
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| 270 | |
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| 271 | a_word_aligned: |
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| 272 | lw r9, r6, r10 /* t1 = *(s+offset) */ |
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| 273 | sw r9, r5, r10 /* *(d+offset) = t1 */ |
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| 274 | addi r4, r4,-4 /* n-- */ |
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| 275 | bneid r4, a_word_aligned /* loop */ |
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| 276 | addi r10, r10, 4 /* offset++ (IN DELAY SLOT) */ |
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| 277 | |
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| 278 | bri a_word_done |
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| 279 | |
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| 280 | a_word_unaligned: |
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| 281 | andi r8, r6, 0xfffffffc /* as = s & ~3 */ |
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| 282 | lwi r11, r8, 0 /* h = *(as + 0) */ |
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| 283 | addi r8, r8, 4 /* as = as + 4 */ |
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| 284 | |
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| 285 | addi r9, r9, -1 |
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| 286 | beqi r9, a_word_u1 /* t1 was 1 => 1 byte offset */ |
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| 287 | addi r9, r9, -1 |
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| 288 | beqi r9, a_word_u2 /* t1 was 2 => 2 byte offset */ |
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| 289 | |
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| 290 | a_word_u3: |
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| 291 | bslli r11, r11, 24 /* h = h << 24 */ |
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| 292 | a_wu3_loop: |
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| 293 | lw r12, r8, r10 /* v = *(as + offset) */ |
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| 294 | bsrli r9, r12, 8 /* t1 = v >> 8 */ |
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| 295 | or r9, r11, r9 /* t1 = h | t1 */ |
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| 296 | sw r9, r5, r10 /* *(d + offset) = t1 */ |
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| 297 | bslli r11, r12, 24 /* h = v << 24 */ |
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| 298 | addi r4, r4,-4 /* n = n - 4 */ |
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| 299 | bneid r4, a_wu3_loop /* while (n) loop */ |
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| 300 | addi r10, r10, 4 /* offset = ofset + 4 (IN DELAY SLOT) */ |
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| 301 | |
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| 302 | bri a_word_done |
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| 303 | |
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| 304 | a_word_u1: |
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| 305 | bslli r11, r11, 8 /* h = h << 8 */ |
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| 306 | a_wu1_loop: |
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| 307 | lw r12, r8, r10 /* v = *(as + offset) */ |
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| 308 | bsrli r9, r12, 24 /* t1 = v >> 24 */ |
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| 309 | or r9, r11, r9 /* t1 = h | t1 */ |
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| 310 | sw r9, r5, r10 /* *(d + offset) = t1 */ |
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| 311 | bslli r11, r12, 8 /* h = v << 8 */ |
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| 312 | addi r4, r4,-4 /* n = n - 4 */ |
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| 313 | bneid r4, a_wu1_loop /* while (n) loop */ |
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| 314 | addi r10, r10, 4 /* offset = ofset + 4 (IN DELAY SLOT) */ |
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| 315 | |
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| 316 | bri a_word_done |
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| 317 | |
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| 318 | a_word_u2: |
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| 319 | bslli r11, r11, 16 /* h = h << 16 */ |
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| 320 | a_wu2_loop: |
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| 321 | lw r12, r8, r10 /* v = *(as + offset) */ |
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| 322 | bsrli r9, r12, 16 /* t1 = v >> 16 */ |
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| 323 | or r9, r11, r9 /* t1 = h | t1 */ |
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| 324 | sw r9, r5, r10 /* *(d + offset) = t1 */ |
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| 325 | bslli r11, r12, 16 /* h = v << 16 */ |
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| 326 | addi r4, r4,-4 /* n = n - 4 */ |
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| 327 | bneid r4, a_wu2_loop /* while (n) loop */ |
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| 328 | addi r10, r10, 4 /* offset = ofset + 4 (IN DELAY SLOT) */ |
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| 329 | |
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| 330 | a_word_done: |
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| 331 | add r5, r5, r10 /* d = d + offset */ |
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| 332 | add r6, r6, r10 /* s = s + offset */ |
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| 333 | rsub r7, r10, r7 /* c = c - offset */ |
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| 334 | |
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| 335 | a_xfer_end: |
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| 336 | a_xfer_end_loop: |
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| 337 | beqi r7, a_done /* while (c) */ |
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| 338 | lbui r9, r6, 0 /* t1 = *s */ |
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| 339 | addi r6, r6, 1 /* s++ */ |
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| 340 | sbi r9, r5, 0 /* *d = t1 */ |
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| 341 | addi r7, r7, -1 /* c-- */ |
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| 342 | brid a_xfer_end_loop /* loop */ |
|---|
| 343 | addi r5, r5, 1 /* d++ (IN DELAY SLOT) */ |
|---|
| 344 | |
|---|
| 345 | a_done: |
|---|
| 346 | rtsd r15, 8 |
|---|
| 347 | nop |
|---|
| 348 | |
|---|
| 349 | .size memcpy, . - memcpy |
|---|
| 350 | .end memcpy |
|---|
| 351 | /*----------------------------------------------------------------------------*/ |
|---|
| 352 | .globl memmove |
|---|
| 353 | .type memmove, @function |
|---|
| 354 | .ent memmove |
|---|
| 355 | |
|---|
| 356 | memmove: |
|---|
| 357 | cmpu r4, r5, r6 /* n = s - d */ |
|---|
| 358 | bgei r4,fast_memcpy_ascending |
|---|
| 359 | |
|---|
| 360 | fast_memcpy_descending: |
|---|
| 361 | /* move d to return register as value of function */ |
|---|
| 362 | addi r3, r5, 0 |
|---|
| 363 | |
|---|
| 364 | add r5, r5, r7 /* d = d + c */ |
|---|
| 365 | add r6, r6, r7 /* s = s + c */ |
|---|
| 366 | |
|---|
| 367 | addi r4, r0, 4 /* n = 4 */ |
|---|
| 368 | cmpu r4, r4, r7 /* n = c - n (unsigned) */ |
|---|
| 369 | blti r4,d_xfer_end /* if n < 0, less than one word to transfer */ |
|---|
| 370 | |
|---|
| 371 | /* transfer first 0~3 bytes to get aligned dest address */ |
|---|
| 372 | andi r4, r5, 3 /* n = d & 3 */ |
|---|
| 373 | /* if zero, destination already aligned */ |
|---|
| 374 | beqi r4,d_dalign_done |
|---|
| 375 | rsub r7, r4, r7 /* c = c - n adjust c */ |
|---|
| 376 | |
|---|
| 377 | d_xfer_first_loop: |
|---|
| 378 | /* if no bytes left to transfer, transfer the bulk */ |
|---|
| 379 | beqi r4,d_dalign_done |
|---|
| 380 | addi r6, r6, -1 /* s-- */ |
|---|
| 381 | addi r5, r5, -1 /* d-- */ |
|---|
| 382 | lbui r11, r6, 0 /* h = *s */ |
|---|
| 383 | sbi r11, r5, 0 /* *d = h */ |
|---|
| 384 | brid d_xfer_first_loop /* loop */ |
|---|
| 385 | addi r4, r4, -1 /* n-- (IN DELAY SLOT) */ |
|---|
| 386 | |
|---|
| 387 | d_dalign_done: |
|---|
| 388 | addi r4, r0, 32 /* n = 32 */ |
|---|
| 389 | cmpu r4, r4, r7 /* n = c - n (unsigned) */ |
|---|
| 390 | /* if n < 0, less than one block to transfer */ |
|---|
| 391 | blti r4, d_block_done |
|---|
| 392 | |
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| 393 | d_block_xfer: |
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| 394 | andi r4, r7, 0xffffffe0 /* n = c & ~31 */ |
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| 395 | rsub r7, r4, r7 /* c = c - n */ |
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| 396 | |
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| 397 | andi r9, r6, 3 /* t1 = s & 3 */ |
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| 398 | /* if temp != 0, unaligned transfers needed */ |
|---|
| 399 | bnei r9, d_block_unaligned |
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| 400 | |
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| 401 | d_block_aligned: |
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| 402 | addi r6, r6, -32 /* s = s - 32 */ |
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| 403 | addi r5, r5, -32 /* d = d - 32 */ |
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| 404 | lwi r9, r6, 28 /* t1 = *(s + 28) */ |
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| 405 | lwi r10, r6, 24 /* t2 = *(s + 24) */ |
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| 406 | lwi r11, r6, 20 /* t3 = *(s + 20) */ |
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| 407 | lwi r12, r6, 16 /* t4 = *(s + 16) */ |
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| 408 | swi r9, r5, 28 /* *(d + 28) = t1 */ |
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| 409 | swi r10, r5, 24 /* *(d + 24) = t2 */ |
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| 410 | swi r11, r5, 20 /* *(d + 20) = t3 */ |
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| 411 | swi r12, r5, 16 /* *(d + 16) = t4 */ |
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| 412 | lwi r9, r6, 12 /* t1 = *(s + 12) */ |
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| 413 | lwi r10, r6, 8 /* t2 = *(s + 8) */ |
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| 414 | lwi r11, r6, 4 /* t3 = *(s + 4) */ |
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| 415 | lwi r12, r6, 0 /* t4 = *(s + 0) */ |
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| 416 | swi r9, r5, 12 /* *(d + 12) = t1 */ |
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| 417 | swi r10, r5, 8 /* *(d + 8) = t2 */ |
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| 418 | swi r11, r5, 4 /* *(d + 4) = t3 */ |
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| 419 | addi r4, r4, -32 /* n = n - 32 */ |
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| 420 | bneid r4, d_block_aligned /* while (n) loop */ |
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| 421 | swi r12, r5, 0 /* *(d + 0) = t4 (IN DELAY SLOT) */ |
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| 422 | bri d_block_done |
|---|
| 423 | |
|---|
| 424 | d_block_unaligned: |
|---|
| 425 | andi r8, r6, 0xfffffffc /* as = s & ~3 */ |
|---|
| 426 | rsub r6, r4, r6 /* s = s - n */ |
|---|
| 427 | lwi r11, r8, 0 /* h = *(as + 0) */ |
|---|
| 428 | |
|---|
| 429 | addi r9, r9, -1 |
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| 430 | beqi r9,d_block_u1 /* t1 was 1 => 1 byte offset */ |
|---|
| 431 | addi r9, r9, -1 |
|---|
| 432 | beqi r9,d_block_u2 /* t1 was 2 => 2 byte offset */ |
|---|
| 433 | |
|---|
| 434 | d_block_u3: |
|---|
| 435 | bsrli r11, r11, 8 /* h = h >> 8 */ |
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| 436 | d_bu3_loop: |
|---|
| 437 | addi r8, r8, -32 /* as = as - 32 */ |
|---|
| 438 | addi r5, r5, -32 /* d = d - 32 */ |
|---|
| 439 | lwi r12, r8, 28 /* v = *(as + 28) */ |
|---|
| 440 | bslli r9, r12, 24 /* t1 = v << 24 */ |
|---|
| 441 | or r9, r11, r9 /* t1 = h | t1 */ |
|---|
| 442 | swi r9, r5, 28 /* *(d + 28) = t1 */ |
|---|
| 443 | bsrli r11, r12, 8 /* h = v >> 8 */ |
|---|
| 444 | lwi r12, r8, 24 /* v = *(as + 24) */ |
|---|
| 445 | bslli r9, r12, 24 /* t1 = v << 24 */ |
|---|
| 446 | or r9, r11, r9 /* t1 = h | t1 */ |
|---|
| 447 | swi r9, r5, 24 /* *(d + 24) = t1 */ |
|---|
| 448 | bsrli r11, r12, 8 /* h = v >> 8 */ |
|---|
| 449 | lwi r12, r8, 20 /* v = *(as + 20) */ |
|---|
| 450 | bslli r9, r12, 24 /* t1 = v << 24 */ |
|---|
| 451 | or r9, r11, r9 /* t1 = h | t1 */ |
|---|
| 452 | swi r9, r5, 20 /* *(d + 20) = t1 */ |
|---|
| 453 | bsrli r11, r12, 8 /* h = v >> 8 */ |
|---|
| 454 | lwi r12, r8, 16 /* v = *(as + 16) */ |
|---|
| 455 | bslli r9, r12, 24 /* t1 = v << 24 */ |
|---|
| 456 | or r9, r11, r9 /* t1 = h | t1 */ |
|---|
| 457 | swi r9, r5, 16 /* *(d + 16) = t1 */ |
|---|
| 458 | bsrli r11, r12, 8 /* h = v >> 8 */ |
|---|
| 459 | lwi r12, r8, 12 /* v = *(as + 12) */ |
|---|
| 460 | bslli r9, r12, 24 /* t1 = v << 24 */ |
|---|
| 461 | or r9, r11, r9 /* t1 = h | t1 */ |
|---|
| 462 | swi r9, r5, 12 /* *(d + 112) = t1 */ |
|---|
| 463 | bsrli r11, r12, 8 /* h = v >> 8 */ |
|---|
| 464 | lwi r12, r8, 8 /* v = *(as + 8) */ |
|---|
| 465 | bslli r9, r12, 24 /* t1 = v << 24 */ |
|---|
| 466 | or r9, r11, r9 /* t1 = h | t1 */ |
|---|
| 467 | swi r9, r5, 8 /* *(d + 8) = t1 */ |
|---|
| 468 | bsrli r11, r12, 8 /* h = v >> 8 */ |
|---|
| 469 | lwi r12, r8, 4 /* v = *(as + 4) */ |
|---|
| 470 | bslli r9, r12, 24 /* t1 = v << 24 */ |
|---|
| 471 | or r9, r11, r9 /* t1 = h | t1 */ |
|---|
| 472 | swi r9, r5, 4 /* *(d + 4) = t1 */ |
|---|
| 473 | bsrli r11, r12, 8 /* h = v >> 8 */ |
|---|
| 474 | lwi r12, r8, 0 /* v = *(as + 0) */ |
|---|
| 475 | bslli r9, r12, 24 /* t1 = v << 24 */ |
|---|
| 476 | or r9, r11, r9 /* t1 = h | t1 */ |
|---|
| 477 | swi r9, r5, 0 /* *(d + 0) = t1 */ |
|---|
| 478 | addi r4, r4, -32 /* n = n - 32 */ |
|---|
| 479 | bneid r4, d_bu3_loop /* while (n) loop */ |
|---|
| 480 | bsrli r11, r12, 8 /* h = v >> 8 (IN DELAY SLOT) */ |
|---|
| 481 | bri d_block_done |
|---|
| 482 | |
|---|
| 483 | d_block_u1: |
|---|
| 484 | bsrli r11, r11, 24 /* h = h >> 24 */ |
|---|
| 485 | d_bu1_loop: |
|---|
| 486 | addi r8, r8, -32 /* as = as - 32 */ |
|---|
| 487 | addi r5, r5, -32 /* d = d - 32 */ |
|---|
| 488 | lwi r12, r8, 28 /* v = *(as + 28) */ |
|---|
| 489 | bslli r9, r12, 8 /* t1 = v << 8 */ |
|---|
| 490 | or r9, r11, r9 /* t1 = h | t1 */ |
|---|
| 491 | swi r9, r5, 28 /* *(d + 28) = t1 */ |
|---|
| 492 | bsrli r11, r12, 24 /* h = v >> 24 */ |
|---|
| 493 | lwi r12, r8, 24 /* v = *(as + 24) */ |
|---|
| 494 | bslli r9, r12, 8 /* t1 = v << 8 */ |
|---|
| 495 | or r9, r11, r9 /* t1 = h | t1 */ |
|---|
| 496 | swi r9, r5, 24 /* *(d + 24) = t1 */ |
|---|
| 497 | bsrli r11, r12, 24 /* h = v >> 24 */ |
|---|
| 498 | lwi r12, r8, 20 /* v = *(as + 20) */ |
|---|
| 499 | bslli r9, r12, 8 /* t1 = v << 8 */ |
|---|
| 500 | or r9, r11, r9 /* t1 = h | t1 */ |
|---|
| 501 | swi r9, r5, 20 /* *(d + 20) = t1 */ |
|---|
| 502 | bsrli r11, r12, 24 /* h = v >> 24 */ |
|---|
| 503 | lwi r12, r8, 16 /* v = *(as + 16) */ |
|---|
| 504 | bslli r9, r12, 8 /* t1 = v << 8 */ |
|---|
| 505 | or r9, r11, r9 /* t1 = h | t1 */ |
|---|
| 506 | swi r9, r5, 16 /* *(d + 16) = t1 */ |
|---|
| 507 | bsrli r11, r12, 24 /* h = v >> 24 */ |
|---|
| 508 | lwi r12, r8, 12 /* v = *(as + 12) */ |
|---|
| 509 | bslli r9, r12, 8 /* t1 = v << 8 */ |
|---|
| 510 | or r9, r11, r9 /* t1 = h | t1 */ |
|---|
| 511 | swi r9, r5, 12 /* *(d + 112) = t1 */ |
|---|
| 512 | bsrli r11, r12, 24 /* h = v >> 24 */ |
|---|
| 513 | lwi r12, r8, 8 /* v = *(as + 8) */ |
|---|
| 514 | bslli r9, r12, 8 /* t1 = v << 8 */ |
|---|
| 515 | or r9, r11, r9 /* t1 = h | t1 */ |
|---|
| 516 | swi r9, r5, 8 /* *(d + 8) = t1 */ |
|---|
| 517 | bsrli r11, r12, 24 /* h = v >> 24 */ |
|---|
| 518 | lwi r12, r8, 4 /* v = *(as + 4) */ |
|---|
| 519 | bslli r9, r12, 8 /* t1 = v << 8 */ |
|---|
| 520 | or r9, r11, r9 /* t1 = h | t1 */ |
|---|
| 521 | swi r9, r5, 4 /* *(d + 4) = t1 */ |
|---|
| 522 | bsrli r11, r12, 24 /* h = v >> 24 */ |
|---|
| 523 | lwi r12, r8, 0 /* v = *(as + 0) */ |
|---|
| 524 | bslli r9, r12, 8 /* t1 = v << 8 */ |
|---|
| 525 | or r9, r11, r9 /* t1 = h | t1 */ |
|---|
| 526 | swi r9, r5, 0 /* *(d + 0) = t1 */ |
|---|
| 527 | addi r4, r4, -32 /* n = n - 32 */ |
|---|
| 528 | bneid r4, d_bu1_loop /* while (n) loop */ |
|---|
| 529 | bsrli r11, r12, 24 /* h = v >> 24 (IN DELAY SLOT) */ |
|---|
| 530 | bri d_block_done |
|---|
| 531 | |
|---|
| 532 | d_block_u2: |
|---|
| 533 | bsrli r11, r11, 16 /* h = h >> 16 */ |
|---|
| 534 | d_bu2_loop: |
|---|
| 535 | addi r8, r8, -32 /* as = as - 32 */ |
|---|
| 536 | addi r5, r5, -32 /* d = d - 32 */ |
|---|
| 537 | lwi r12, r8, 28 /* v = *(as + 28) */ |
|---|
| 538 | bslli r9, r12, 16 /* t1 = v << 16 */ |
|---|
| 539 | or r9, r11, r9 /* t1 = h | t1 */ |
|---|
| 540 | swi r9, r5, 28 /* *(d + 28) = t1 */ |
|---|
| 541 | bsrli r11, r12, 16 /* h = v >> 16 */ |
|---|
| 542 | lwi r12, r8, 24 /* v = *(as + 24) */ |
|---|
| 543 | bslli r9, r12, 16 /* t1 = v << 16 */ |
|---|
| 544 | or r9, r11, r9 /* t1 = h | t1 */ |
|---|
| 545 | swi r9, r5, 24 /* *(d + 24) = t1 */ |
|---|
| 546 | bsrli r11, r12, 16 /* h = v >> 16 */ |
|---|
| 547 | lwi r12, r8, 20 /* v = *(as + 20) */ |
|---|
| 548 | bslli r9, r12, 16 /* t1 = v << 16 */ |
|---|
| 549 | or r9, r11, r9 /* t1 = h | t1 */ |
|---|
| 550 | swi r9, r5, 20 /* *(d + 20) = t1 */ |
|---|
| 551 | bsrli r11, r12, 16 /* h = v >> 16 */ |
|---|
| 552 | lwi r12, r8, 16 /* v = *(as + 16) */ |
|---|
| 553 | bslli r9, r12, 16 /* t1 = v << 16 */ |
|---|
| 554 | or r9, r11, r9 /* t1 = h | t1 */ |
|---|
| 555 | swi r9, r5, 16 /* *(d + 16) = t1 */ |
|---|
| 556 | bsrli r11, r12, 16 /* h = v >> 16 */ |
|---|
| 557 | lwi r12, r8, 12 /* v = *(as + 12) */ |
|---|
| 558 | bslli r9, r12, 16 /* t1 = v << 16 */ |
|---|
| 559 | or r9, r11, r9 /* t1 = h | t1 */ |
|---|
| 560 | swi r9, r5, 12 /* *(d + 112) = t1 */ |
|---|
| 561 | bsrli r11, r12, 16 /* h = v >> 16 */ |
|---|
| 562 | lwi r12, r8, 8 /* v = *(as + 8) */ |
|---|
| 563 | bslli r9, r12, 16 /* t1 = v << 16 */ |
|---|
| 564 | or r9, r11, r9 /* t1 = h | t1 */ |
|---|
| 565 | swi r9, r5, 8 /* *(d + 8) = t1 */ |
|---|
| 566 | bsrli r11, r12, 16 /* h = v >> 16 */ |
|---|
| 567 | lwi r12, r8, 4 /* v = *(as + 4) */ |
|---|
| 568 | bslli r9, r12, 16 /* t1 = v << 16 */ |
|---|
| 569 | or r9, r11, r9 /* t1 = h | t1 */ |
|---|
| 570 | swi r9, r5, 4 /* *(d + 4) = t1 */ |
|---|
| 571 | bsrli r11, r12, 16 /* h = v >> 16 */ |
|---|
| 572 | lwi r12, r8, 0 /* v = *(as + 0) */ |
|---|
| 573 | bslli r9, r12, 16 /* t1 = v << 16 */ |
|---|
| 574 | or r9, r11, r9 /* t1 = h | t1 */ |
|---|
| 575 | swi r9, r5, 0 /* *(d + 0) = t1 */ |
|---|
| 576 | addi r4, r4, -32 /* n = n - 32 */ |
|---|
| 577 | bneid r4, d_bu2_loop /* while (n) loop */ |
|---|
| 578 | bsrli r11, r12, 16 /* h = v >> 16 (IN DELAY SLOT) */ |
|---|
| 579 | |
|---|
| 580 | d_block_done: |
|---|
| 581 | addi r4, r0, 4 /* n = 4 */ |
|---|
| 582 | cmpu r4, r4, r7 /* n = c - n (unsigned) */ |
|---|
| 583 | blti r4,d_xfer_end /* if n < 0, less than one word to transfer */ |
|---|
| 584 | |
|---|
| 585 | d_word_xfer: |
|---|
| 586 | andi r4, r7, 0xfffffffc /* n = c & ~3 */ |
|---|
| 587 | rsub r5, r4, r5 /* d = d - n */ |
|---|
| 588 | rsub r6, r4, r6 /* s = s - n */ |
|---|
| 589 | rsub r7, r4, r7 /* c = c - n */ |
|---|
| 590 | |
|---|
| 591 | andi r9, r6, 3 /* t1 = s & 3 */ |
|---|
| 592 | /* if temp != 0, unaligned transfers needed */ |
|---|
| 593 | bnei r9, d_word_unaligned |
|---|
| 594 | |
|---|
| 595 | d_word_aligned: |
|---|
| 596 | addi r4, r4,-4 /* n-- */ |
|---|
| 597 | lw r9, r6, r4 /* t1 = *(s+n) */ |
|---|
| 598 | bneid r4, d_word_aligned /* loop */ |
|---|
| 599 | sw r9, r5, r4 /* *(d+n) = t1 (IN DELAY SLOT) */ |
|---|
| 600 | |
|---|
| 601 | bri d_word_done |
|---|
| 602 | |
|---|
| 603 | d_word_unaligned: |
|---|
| 604 | andi r8, r6, 0xfffffffc /* as = s & ~3 */ |
|---|
| 605 | lw r11, r8, r4 /* h = *(as + n) */ |
|---|
| 606 | |
|---|
| 607 | addi r9, r9, -1 |
|---|
| 608 | beqi r9,d_word_u1 /* t1 was 1 => 1 byte offset */ |
|---|
| 609 | addi r9, r9, -1 |
|---|
| 610 | beqi r9,d_word_u2 /* t1 was 2 => 2 byte offset */ |
|---|
| 611 | |
|---|
| 612 | d_word_u3: |
|---|
| 613 | bsrli r11, r11, 8 /* h = h >> 8 */ |
|---|
| 614 | d_wu3_loop: |
|---|
| 615 | addi r4, r4,-4 /* n = n - 4 */ |
|---|
| 616 | lw r12, r8, r4 /* v = *(as + n) */ |
|---|
| 617 | bslli r9, r12, 24 /* t1 = v << 24 */ |
|---|
| 618 | or r9, r11, r9 /* t1 = h | t1 */ |
|---|
| 619 | sw r9, r5, r4 /* *(d + n) = t1 */ |
|---|
| 620 | bneid r4, d_wu3_loop /* while (n) loop */ |
|---|
| 621 | bsrli r11, r12, 8 /* h = v >> 8 (IN DELAY SLOT) */ |
|---|
| 622 | |
|---|
| 623 | bri d_word_done |
|---|
| 624 | |
|---|
| 625 | d_word_u1: |
|---|
| 626 | bsrli r11, r11, 24 /* h = h >> 24 */ |
|---|
| 627 | d_wu1_loop: |
|---|
| 628 | addi r4, r4,-4 /* n = n - 4 */ |
|---|
| 629 | lw r12, r8, r4 /* v = *(as + n) */ |
|---|
| 630 | bslli r9, r12, 8 /* t1 = v << 8 */ |
|---|
| 631 | or r9, r11, r9 /* t1 = h | t1 */ |
|---|
| 632 | sw r9, r5, r4 /* *(d + n) = t1 */ |
|---|
| 633 | bneid r4, d_wu1_loop /* while (n) loop */ |
|---|
| 634 | bsrli r11, r12, 24 /* h = v >> 24 (IN DELAY SLOT) */ |
|---|
| 635 | |
|---|
| 636 | bri d_word_done |
|---|
| 637 | |
|---|
| 638 | d_word_u2: |
|---|
| 639 | bsrli r11, r11, 16 /* h = h >> 16 */ |
|---|
| 640 | d_wu2_loop: |
|---|
| 641 | addi r4, r4,-4 /* n = n - 4 */ |
|---|
| 642 | lw r12, r8, r4 /* v = *(as + n) */ |
|---|
| 643 | bslli r9, r12, 16 /* t1 = v << 16 */ |
|---|
| 644 | or r9, r11, r9 /* t1 = h | t1 */ |
|---|
| 645 | sw r9, r5, r4 /* *(d + n) = t1 */ |
|---|
| 646 | bneid r4, d_wu2_loop /* while (n) loop */ |
|---|
| 647 | bsrli r11, r12, 16 /* h = v >> 16 (IN DELAY SLOT) */ |
|---|
| 648 | |
|---|
| 649 | d_word_done: |
|---|
| 650 | |
|---|
| 651 | d_xfer_end: |
|---|
| 652 | d_xfer_end_loop: |
|---|
| 653 | beqi r7, a_done /* while (c) */ |
|---|
| 654 | addi r6, r6, -1 /* s-- */ |
|---|
| 655 | lbui r9, r6, 0 /* t1 = *s */ |
|---|
| 656 | addi r5, r5, -1 /* d-- */ |
|---|
| 657 | sbi r9, r5, 0 /* *d = t1 */ |
|---|
| 658 | brid d_xfer_end_loop /* loop */ |
|---|
| 659 | addi r7, r7, -1 /* c-- (IN DELAY SLOT) */ |
|---|
| 660 | |
|---|
| 661 | d_done: |
|---|
| 662 | rtsd r15, 8 |
|---|
| 663 | nop |
|---|
| 664 | |
|---|
| 665 | .size memmove, . - memmove |
|---|
| 666 | .end memmove |
|---|
| 667 | |
|---|
