1/* Optimized memcpy implementation for cached memory on PowerPC64/POWER8. 2 Copyright (C) 2017-2022 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 4 5 The GNU C Library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 The GNU C Library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with the GNU C Library; if not, see 17 <https://www.gnu.org/licenses/>. */ 18 19#include <sysdep.h> 20 21 22/* __ptr_t [r3] memcpy (__ptr_t dst [r3], __ptr_t src [r4], size_t len [r5]); 23 Returns 'dst'. */ 24 25 .machine power8 26ENTRY_TOCLESS (__memcpy_power8_cached, 5) 27 CALL_MCOUNT 3 28 29 cmpldi cr7,r5,15 30 bgt cr7,L(ge_16) 31 andi. r9,r5,0x1 32 mr r9,r3 33 beq cr0,1f 34 lbz r10,0(r4) 35 addi r9,r3,1 36 addi r4,r4,1 37 stb r10,0(r3) 381: 39 andi. r10,r5,0x2 40 beq cr0,2f 41 lhz r10,0(r4) 42 addi r9,r9,2 43 addi r4,r4,2 44 sth r10,-2(r9) 452: 46 andi. r10,r5,0x4 47 beq cr0,3f 48 lwz r10,0(r4) 49 addi r9,9,4 50 addi r4,4,4 51 stw r10,-4(r9) 523: 53 andi. r10,r5,0x8 54 beqlr cr0 55 ld r10,0(r4) 56 std r10,0(r9) 57 blr 58 59 .align 4 60L(ge_16): 61 cmpldi cr7,r5,32 62 ble cr7,L(ge_16_le_32) 63 cmpldi cr7,r5,64 64 ble cr7,L(gt_32_le_64) 65 66 /* Align dst to 16 bytes. */ 67 andi. r9,r3,0xf 68 mr r12,r3 69 beq cr0,L(dst_is_align_16) 70 lxvd2x v0,0,r4 71 subfic r12,r9,16 72 subf r5,r12,r5 73 add r4,r4,r12 74 add r12,r3,r12 75 stxvd2x v0,0,r3 76L(dst_is_align_16): 77 cmpldi cr7,r5,127 78 ble cr7,L(tail_copy) 79 mr r9,r12 80 srdi r10,r5,7 81 li r11,16 82 li r6,32 83 li r7,48 84 mtctr r10 85 clrrdi r0,r5,7 86 87 /* Main loop, copy 128 bytes each time. */ 88 .align 4 89L(copy_128): 90 lxvd2x v10,0,r4 91 lxvd2x v11,r4,r11 92 addi r8,r4,64 93 addi r10,r9,64 94 lxvd2x v12,r4,r6 95 lxvd2x v0,r4,r7 96 addi r4,r4,128 97 stxvd2x v10,0,r9 98 stxvd2x v11,r9,r11 99 stxvd2x v12,r9,r6 100 stxvd2x v0,r9,r7 101 addi r9,r9,128 102 lxvd2x v10,0,r8 103 lxvd2x v11,r8,r11 104 lxvd2x v12,r8,r6 105 lxvd2x v0,r8,r7 106 stxvd2x v10,0,r10 107 stxvd2x v11,r10,r11 108 stxvd2x v12,r10,r6 109 stxvd2x v0,r10,r7 110 bdnz L(copy_128) 111 112 add r12,r12,r0 113 rldicl r5,r5,0,57 114L(tail_copy): 115 cmpldi cr7,r5,63 116 ble cr7,L(tail_le_64) 117 li r8,16 118 li r10,32 119 lxvd2x v10,0,r4 120 li r9,48 121 addi r5,r5,-64 122 lxvd2x v11,r4,r8 123 lxvd2x v12,r4,r10 124 lxvd2x v0,r4,r9 125 addi r4,r4,64 126 stxvd2x v10,0,r12 127 stxvd2x v11,r12,r8 128 stxvd2x v12,r12,r10 129 stxvd2x v0,r12,9 130 addi r12,r12,64 131 132L(tail_le_64): 133 cmpldi cr7,r5,32 134 bgt cr7,L(tail_gt_32_le_64) 135 cmpdi cr7,r5,0 136 beqlr cr7 137 addi r5,r5,-32 138 li r9,16 139 add r8,r4,r5 140 add r10,r12,r5 141 lxvd2x v12,r4,r5 142 lxvd2x v0,r8,r9 143 stxvd2x v12,r12,r5 144 stxvd2x v0,r10,r9 145 blr 146 147 .align 4 148L(ge_16_le_32): 149 addi r5,r5,-16 150 lxvd2x v0,0,r4 151 lxvd2x v1,r4,r5 152 stxvd2x v0,0,r3 153 stxvd2x v1,r3,r5 154 blr 155 156 .align 4 157L(gt_32_le_64): 158 mr r12,r3 159 160 .align 4 161L(tail_gt_32_le_64): 162 li r9,16 163 lxvd2x v0,0,r4 164 addi r5,r5,-32 165 lxvd2x v1,r4,r9 166 add r8,r4,r5 167 lxvd2x v2,r4,r5 168 add r10,r12,r5 169 lxvd2x v3,r8,r9 170 stxvd2x v0,0,r12 171 stxvd2x v1,r12,r9 172 stxvd2x v2,r12,r5 173 stxvd2x v3,r10,r9 174 blr 175 176END_GEN_TB (__memcpy_power8_cached,TB_TOCLESS) 177