| Thomas Gleixner | d2912cb | 2019-06-04 10:11:33 +0200 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| Vineet Gupta | 5210d1e | 2013-01-18 15:12:18 +0530 | [diff] [blame] | 2 | /* |
| 3 | * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) |
| Vineet Gupta | 5210d1e | 2013-01-18 15:12:18 +0530 | [diff] [blame] | 4 | */ |
| 5 | |
| Vineet Gupta | ec7ac6a | 2014-02-07 13:47:43 +0530 | [diff] [blame] | 6 | #include <linux/linkage.h> |
| Vineet Gupta | 5210d1e | 2013-01-18 15:12:18 +0530 | [diff] [blame] | 7 | |
| Vineet Gupta | 86effd0 | 2016-09-19 16:42:25 -0700 | [diff] [blame] | 8 | ENTRY_CFI(strlen) |
| Vineet Gupta | 5210d1e | 2013-01-18 15:12:18 +0530 | [diff] [blame] | 9 | or r3,r0,7 |
| 10 | ld r2,[r3,-7] |
| 11 | ld.a r6,[r3,-3] |
| 12 | mov r4,0x01010101 |
| 13 | ; uses long immediate |
| 14 | #ifdef __LITTLE_ENDIAN__ |
| 15 | asl_s r1,r0,3 |
| 16 | btst_s r0,2 |
| 17 | asl r7,r4,r1 |
| 18 | ror r5,r4 |
| 19 | sub r1,r2,r7 |
| 20 | bic_s r1,r1,r2 |
| 21 | mov.eq r7,r4 |
| 22 | sub r12,r6,r7 |
| 23 | bic r12,r12,r6 |
| 24 | or.eq r12,r12,r1 |
| 25 | and r12,r12,r5 |
| 26 | brne r12,0,.Learly_end |
| 27 | #else /* BIG ENDIAN */ |
| 28 | ror r5,r4 |
| 29 | btst_s r0,2 |
| 30 | mov_s r1,31 |
| 31 | sub3 r7,r1,r0 |
| 32 | sub r1,r2,r4 |
| 33 | bic_s r1,r1,r2 |
| 34 | bmsk r1,r1,r7 |
| 35 | sub r12,r6,r4 |
| 36 | bic r12,r12,r6 |
| 37 | bmsk.ne r12,r12,r7 |
| 38 | or.eq r12,r12,r1 |
| 39 | and r12,r12,r5 |
| 40 | brne r12,0,.Learly_end |
| 41 | #endif /* ENDIAN */ |
| 42 | |
| 43 | .Loop: |
| 44 | ld_s r2,[r3,4] |
| 45 | ld.a r6,[r3,8] |
| 46 | ; stall for load result |
| 47 | sub r1,r2,r4 |
| 48 | bic_s r1,r1,r2 |
| 49 | sub r12,r6,r4 |
| 50 | bic r12,r12,r6 |
| 51 | or r12,r12,r1 |
| 52 | and r12,r12,r5 |
| 53 | breq r12,0,.Loop |
| 54 | .Lend: |
| 55 | and.f r1,r1,r5 |
| 56 | sub.ne r3,r3,4 |
| 57 | mov.eq r1,r12 |
| 58 | #ifdef __LITTLE_ENDIAN__ |
| 59 | sub_s r2,r1,1 |
| 60 | bic_s r2,r2,r1 |
| 61 | norm r1,r2 |
| 62 | sub_s r0,r0,3 |
| 63 | lsr_s r1,r1,3 |
| 64 | sub r0,r3,r0 |
| 65 | j_s.d [blink] |
| 66 | sub r0,r0,r1 |
| 67 | #else /* BIG ENDIAN */ |
| 68 | lsr_s r1,r1,7 |
| 69 | mov.eq r2,r6 |
| 70 | bic_s r1,r1,r2 |
| 71 | norm r1,r1 |
| 72 | sub r0,r3,r0 |
| 73 | lsr_s r1,r1,3 |
| 74 | j_s.d [blink] |
| 75 | add r0,r0,r1 |
| 76 | #endif /* ENDIAN */ |
| 77 | .Learly_end: |
| 78 | b.d .Lend |
| 79 | sub_s.ne r1,r1,r1 |
| Vineet Gupta | 86effd0 | 2016-09-19 16:42:25 -0700 | [diff] [blame] | 80 | END_CFI(strlen) |