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| /* SPDX-License-Identifier: GPL-2.0-only */
| /*
| * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
| */
|
| #include <linux/linkage.h>
|
| ENTRY_CFI(strcmp)
| or r2, r0, r1
| bmsk_s r2, r2, 1
| brne r2, 0, @.Lcharloop
|
| ;;; s1 and s2 are word aligned
| ld.ab r2, [r0, 4]
|
| mov_s r12, 0x01010101
| ror r11, r12
| .align 4
| .LwordLoop:
| ld.ab r3, [r1, 4]
| ;; Detect NULL char in str1
| sub r4, r2, r12
| ld.ab r5, [r0, 4]
| bic r4, r4, r2
| and r4, r4, r11
| brne.d.nt r4, 0, .LfoundNULL
| ;; Check if the read locations are the same
| cmp r2, r3
| beq.d .LwordLoop
| mov.eq r2, r5
|
| ;; A match is found, spot it out
| #ifdef __LITTLE_ENDIAN__
| swape r3, r3
| mov_s r0, 1
| swape r2, r2
| #else
| mov_s r0, 1
| #endif
| cmp_s r2, r3
| j_s.d [blink]
| bset.lo r0, r0, 31
|
| .align 4
| .LfoundNULL:
| #ifdef __BIG_ENDIAN__
| swape r4, r4
| swape r2, r2
| swape r3, r3
| #endif
| ;; Find null byte
| ffs r0, r4
| bmsk r2, r2, r0
| bmsk r3, r3, r0
| swape r2, r2
| swape r3, r3
| ;; make the return value
| sub.f r0, r2, r3
| mov.hi r0, 1
| j_s.d [blink]
| bset.lo r0, r0, 31
|
| .align 4
| .Lcharloop:
| ldb.ab r2, [r0, 1]
| ldb.ab r3, [r1, 1]
| nop
| breq r2, 0, .Lcmpend
| breq r2, r3, .Lcharloop
|
| .align 4
| .Lcmpend:
| j_s.d [blink]
| sub r0, r2, r3
| END_CFI(strcmp)
|
|
