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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 | /* SPDX-License-Identifier: GPL-2.0 */ // Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #include <linux/linkage.h> #include "sysdep.h" ENTRY(strcpy) mov a3, a0 /* Check if the src addr is aligned. */ andi t0, a1, 3 bnez t0, 11f 1: /* Check if all the bytes in the word are not zero. */ ldw a2, (a1) tstnbz a2 bf 9f stw a2, (a3) ldw a2, (a1, 4) tstnbz a2 bf 2f stw a2, (a3, 4) ldw a2, (a1, 8) tstnbz a2 bf 3f stw a2, (a3, 8) ldw a2, (a1, 12) tstnbz a2 bf 4f stw a2, (a3, 12) ldw a2, (a1, 16) tstnbz a2 bf 5f stw a2, (a3, 16) ldw a2, (a1, 20) tstnbz a2 bf 6f stw a2, (a3, 20) ldw a2, (a1, 24) tstnbz a2 bf 7f stw a2, (a3, 24) ldw a2, (a1, 28) tstnbz a2 bf 8f stw a2, (a3, 28) addi a3, 32 addi a1, 32 br 1b 2: addi a3, 4 br 9f 3: addi a3, 8 br 9f 4: addi a3, 12 br 9f 5: addi a3, 16 br 9f 6: addi a3, 20 br 9f 7: addi a3, 24 br 9f 8: addi a3, 28 9: # ifdef __CSKYBE__ xtrb0 t0, a2 st.b t0, (a3) bez t0, 10f xtrb1 t0, a2 st.b t0, (a3, 1) bez t0, 10f xtrb2 t0, a2 st.b t0, (a3, 2) bez t0, 10f stw a2, (a3) # else xtrb3 t0, a2 st.b t0, (a3) bez t0, 10f xtrb2 t0, a2 st.b t0, (a3, 1) bez t0, 10f xtrb1 t0, a2 st.b t0, (a3, 2) bez t0, 10f stw a2, (a3) # endif /* !__CSKYBE__ */ 10: jmp lr 11: subi t0, 4 12: ld.b a2, (a1) st.b a2, (a3) bez a2, 10b addi t0, 1 addi a1, a1, 1 addi a3, a3, 1 bnez t0, 12b jbr 1b ENDPROC(strcpy) |