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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 | /* linux/arch/sparc/lib/memset.S: Sparc optimized memset and bzero code * Hand optimized from GNU libc's memset * Copyright (C) 1991,1996 Free Software Foundation * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz) * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu) */ #include <asm/cprefix.h> #include <asm/ptrace.h> /* Store 64 bytes at (BASE + OFFSET) using value SOURCE. */ #define ZERO_BIG_BLOCK(base, offset, source) \ std source, [base + offset + 0x00]; \ std source, [base + offset + 0x08]; \ std source, [base + offset + 0x10]; \ std source, [base + offset + 0x18]; \ std source, [base + offset + 0x20]; \ std source, [base + offset + 0x28]; \ std source, [base + offset + 0x30]; \ std source, [base + offset + 0x38]; #define ZERO_LAST_BLOCKS(base, offset, source) \ std source, [base - offset - 0x38]; \ std source, [base - offset - 0x30]; \ std source, [base - offset - 0x28]; \ std source, [base - offset - 0x20]; \ std source, [base - offset - 0x18]; \ std source, [base - offset - 0x10]; \ std source, [base - offset - 0x08]; \ std source, [base - offset - 0x00]; .text .align 4 .globl C_LABEL(__bzero), C_LABEL(__memset), C_LABEL(memset) C_LABEL(__memset): C_LABEL(memset): and %o1, 0xff, %g3 sll %g3, 8, %g2 or %g3, %g2, %g3 sll %g3, 16, %g2 or %g3, %g2, %g3 b 1f mov %o2, %o1 3: cmp %o2, 3 be 2f stb %g3, [%o0] cmp %o2, 2 be 2f stb %g3, [%o0 + 0x01] stb %g3, [%o0 + 0x02] 2: sub %o2, 4, %o2 add %o1, %o2, %o1 b 4f sub %o0, %o2, %o0 C_LABEL(__bzero): mov %g0, %g3 1: mov %o0, %g1 cmp %o1, 7 bleu 7f andcc %o0, 3, %o2 bne 3b 4: andcc %o0, 4, %g0 be 2f mov %g3, %g2 st %g3, [%o0] sub %o1, 4, %o1 add %o0, 4, %o0 2: andcc %o1, 0xffffff80, %o3 ! Now everything is 8 aligned and o1 is len to run be 9f andcc %o1, 0x78, %o2 4: ZERO_BIG_BLOCK(%o0, 0x00, %g2) subcc %o3, 128, %o3 ZERO_BIG_BLOCK(%o0, 0x40, %g2) bne 4b add %o0, 128, %o0 orcc %o2, %g0, %g0 9: be 6f andcc %o1, 7, %o1 srl %o2, 1, %o3 set bzero_table + 64, %o4 sub %o4, %o3, %o4 jmp %o4 add %o0, %o2, %o0 bzero_table: ZERO_LAST_BLOCKS(%o0, 0x48, %g2) ZERO_LAST_BLOCKS(%o0, 0x08, %g2) 6: be 8f andcc %o1, 4, %g0 be 1f andcc %o1, 2, %g0 st %g3, [%o0] add %o0, 4, %o0 1: be 1f andcc %o1, 1, %g0 sth %g3, [%o0] add %o0, 2, %o0 1: bne,a 8f stb %g3, [%o0] 8: retl mov %g1, %o0 7: be 6b orcc %o1, 0, %g0 be 0f 8: add %o0, 1, %o0 subcc %o1, 1, %o1 bne,a 8b stb %g3, [%o0 - 1] 0: retl mov %g1, %o0 |