projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 2874c5fd | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| 70d64cea PM |
2 | /* |
| 3 | * String handling functions for PowerPC. | |
| 4 | * | |
| 5 | * Copyright (C) 1996 Paul Mackerras. | |
| 70d64cea PM |
6 | */ |
| 7 | #include <asm/processor.h> | |
| 8 | #include <asm/errno.h> | |
| 9 | #include <asm/ppc_asm.h> | |
| 9445aa1a | 10 | #include <asm/export.h> |
| 26deb043 | 11 | #include <asm/kasan.h> |
| 70d64cea | 12 | |
| 26deb043 | 13 | #ifndef CONFIG_KASAN |
| 694fc88c NR |
14 | _GLOBAL(__memset16) |
| 15 | rlwimi r4,r4,16,0,15 | |
| 16 | /* fall through */ | |
| 17 | ||
| 18 | _GLOBAL(__memset32) | |
| 19 | rldimi r4,r4,32,0 | |
| 20 | /* fall through */ | |
| 21 | ||
| 22 | _GLOBAL(__memset64) | |
| 23 | neg r0,r3 | |
| 24 | andi. r0,r0,7 | |
| 25 | cmplw cr1,r5,r0 | |
| 26 | b .Lms | |
| 27 | EXPORT_SYMBOL(__memset16) | |
| 28 | EXPORT_SYMBOL(__memset32) | |
| 29 | EXPORT_SYMBOL(__memset64) | |
| 26deb043 | 30 | #endif |
| 694fc88c | 31 | |
| 26deb043 | 32 | _GLOBAL_KASAN(memset) |
| 70d64cea PM |
33 | neg r0,r3 |
| 34 | rlwimi r4,r4,8,16,23 | |
| 35 | andi. r0,r0,7 /* # bytes to be 8-byte aligned */ | |
| 36 | rlwimi r4,r4,16,0,15 | |
| 37 | cmplw cr1,r5,r0 /* do we get that far? */ | |
| 38 | rldimi r4,r4,32,0 | |
| 694fc88c | 39 | .Lms: PPC_MTOCRF(1,r0) |
| 70d64cea PM |
40 | mr r6,r3 |
| 41 | blt cr1,8f | |
| be54c121 | 42 | beq 3f /* if already 8-byte aligned */ |
| 70d64cea PM |
43 | subf r5,r0,r5 |
| 44 | bf 31,1f | |
| 45 | stb r4,0(r6) | |
| 46 | addi r6,r6,1 | |
| 47 | 1: bf 30,2f | |
| 48 | sth r4,0(r6) | |
| 49 | addi r6,r6,2 | |
| 50 | 2: bf 29,3f | |
| 51 | stw r4,0(r6) | |
| 52 | addi r6,r6,4 | |
| 53 | 3: srdi. r0,r5,6 | |
| 54 | clrldi r5,r5,58 | |
| 55 | mtctr r0 | |
| 56 | beq 5f | |
| 12ab11a2 | 57 | .balign 16 |
| 70d64cea PM |
58 | 4: std r4,0(r6) |
| 59 | std r4,8(r6) | |
| 60 | std r4,16(r6) | |
| 61 | std r4,24(r6) | |
| 62 | std r4,32(r6) | |
| 63 | std r4,40(r6) | |
| 64 | std r4,48(r6) | |
| 65 | std r4,56(r6) | |
| 66 | addi r6,r6,64 | |
| 67 | bdnz 4b | |
| 68 | 5: srwi. r0,r5,3 | |
| 69 | clrlwi r5,r5,29 | |
| 694caf02 | 70 | PPC_MTOCRF(1,r0) |
| 70d64cea PM |
71 | beq 8f |
| 72 | bf 29,6f | |
| 73 | std r4,0(r6) | |
| 74 | std r4,8(r6) | |
| 75 | std r4,16(r6) | |
| 76 | std r4,24(r6) | |
| 77 | addi r6,r6,32 | |
| 78 | 6: bf 30,7f | |
| 79 | std r4,0(r6) | |
| 80 | std r4,8(r6) | |
| 81 | addi r6,r6,16 | |
| 82 | 7: bf 31,8f | |
| 83 | std r4,0(r6) | |
| 84 | addi r6,r6,8 | |
| 85 | 8: cmpwi r5,0 | |
| 694caf02 | 86 | PPC_MTOCRF(1,r5) |
| be54c121 | 87 | beqlr |
| 70d64cea PM |
88 | bf 29,9f |
| 89 | stw r4,0(r6) | |
| 90 | addi r6,r6,4 | |
| 91 | 9: bf 30,10f | |
| 92 | sth r4,0(r6) | |
| 93 | addi r6,r6,2 | |
| 94 | 10: bflr 31 | |
| 95 | stb r4,0(r6) | |
| 96 | blr | |
| 9445aa1a | 97 | EXPORT_SYMBOL(memset) |
| 26deb043 | 98 | EXPORT_SYMBOL_KASAN(memset) |
| 70d64cea | 99 | |
| 26deb043 | 100 | _GLOBAL_TOC_KASAN(memmove) |
| 70d64cea | 101 | cmplw 0,r3,r4 |
| b1576fec AB |
102 | bgt backwards_memcpy |
| 103 | b memcpy | |
| 70d64cea PM |
104 | |
| 105 | _GLOBAL(backwards_memcpy) | |
| 106 | rlwinm. r7,r5,32-3,3,31 /* r0 = r5 >> 3 */ | |
| 107 | add r6,r3,r5 | |
| 108 | add r4,r4,r5 | |
| 109 | beq 2f | |
| 110 | andi. r0,r6,3 | |
| 111 | mtctr r7 | |
| 112 | bne 5f | |
| 12ab11a2 | 113 | .balign 16 |
| 70d64cea PM |
114 | 1: lwz r7,-4(r4) |
| 115 | lwzu r8,-8(r4) | |
| 116 | stw r7,-4(r6) | |
| 117 | stwu r8,-8(r6) | |
| 118 | bdnz 1b | |
| 119 | andi. r5,r5,7 | |
| 120 | 2: cmplwi 0,r5,4 | |
| 121 | blt 3f | |
| 122 | lwzu r0,-4(r4) | |
| 123 | subi r5,r5,4 | |
| 124 | stwu r0,-4(r6) | |
| 125 | 3: cmpwi 0,r5,0 | |
| 126 | beqlr | |
| 127 | mtctr r5 | |
| 128 | 4: lbzu r0,-1(r4) | |
| 129 | stbu r0,-1(r6) | |
| 130 | bdnz 4b | |
| 131 | blr | |
| 132 | 5: mtctr r0 | |
| 133 | 6: lbzu r7,-1(r4) | |
| 134 | stbu r7,-1(r6) | |
| 135 | bdnz 6b | |
| 136 | subf r5,r0,r5 | |
| 137 | rlwinm. r7,r5,32-3,3,31 | |
| 138 | beq 2b | |
| 139 | mtctr r7 | |
| 140 | b 1b | |
| 9445aa1a | 141 | EXPORT_SYMBOL(memmove) |
| 26deb043 | 142 | EXPORT_SYMBOL_KASAN(memmove) |