Linux/arch/alpha/lib/memset.S

Version: ~ [ linux-6.11-rc3 ] ~ [ linux-6.10.4 ] ~ [ linux-6.9.12 ] ~ [ linux-6.8.12 ] ~ [ linux-6.7.12 ] ~ [ linux-6.6.45 ] ~ [ linux-6.5.13 ] ~ [ linux-6.4.16 ] ~ [ linux-6.3.13 ] ~ [ linux-6.2.16 ] ~ [ linux-6.1.104 ] ~ [ linux-6.0.19 ] ~ [ linux-5.19.17 ] ~ [ linux-5.18.19 ] ~ [ linux-5.17.15 ] ~ [ linux-5.16.20 ] ~ [ linux-5.15.164 ] ~ [ linux-5.14.21 ] ~ [ linux-5.13.19 ] ~ [ linux-5.12.19 ] ~ [ linux-5.11.22 ] ~ [ linux-5.10.223 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.281 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.319 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.336 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.337 ] ~ [ linux-4.4.302 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.9 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

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1 /* SPDX-License-Identifier: GPL-2.0 */ 1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* !! 2 /* linux/arch/sparc/lib/memset.S: Sparc optimized memset, bzero and clear_user code 3 * linux/arch/alpha/lib/memset.S !! 3 * Copyright (C) 1991,1996 Free Software Foundation >> 4 * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz) >> 5 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu) 4 * 6 * 5 * This is an efficient (and small) implementa !! 7 * Calls to memset returns initial %o0. Calls to bzero returns 0, if ok, and 6 * function for the alpha. !! 8 * number of bytes not yet set if exception occurs and we were called as 7 * !! 9 * clear_user. 8 * (C) Copyright 1996 Linus Torvalds << 9 * << 10 * This routine is "moral-ware": you are free << 11 * the only obligation I put on you is a moral << 12 * to the routine, please send me your improve << 13 * << 14 * The scheduling comments are according to th << 15 * hand, so they might well be incorrect, plea << 16 */ 10 */ 17 #include <linux/export.h> << 18 .set noat << 19 .set noreorder << 20 .text << 21 .globl memset << 22 .globl __memset << 23 .globl ___memset << 24 .globl __memset16 << 25 .globl __constant_c_memset << 26 << 27 .ent ___memset << 28 .align 5 << 29 ___memset: << 30 .frame $30,0,$26,0 << 31 .prologue 0 << 32 << 33 and $17,255,$1 /* E1 */ << 34 insbl $17,1,$17 /* .. E0 */ << 35 bis $17,$1,$17 /* E0 (p-c lat << 36 sll $17,16,$1 /* E1 (p-c lat << 37 << 38 bis $17,$1,$17 /* E0 (p-c lat << 39 sll $17,32,$1 /* E1 (p-c lat << 40 bis $17,$1,$17 /* E0 (p-c lat << 41 ldq_u $31,0($30) /* .. E1 */ << 42 << 43 .align 5 << 44 __constant_c_memset: << 45 addq $18,$16,$6 /* E0 */ << 46 bis $16,$16,$0 /* .. E1 */ << 47 xor $16,$6,$1 /* E0 */ << 48 ble $18,end /* .. E1 */ << 49 << 50 bic $1,7,$1 /* E0 */ << 51 beq $1,within_one_quad /* .. E1 (note << 52 and $16,7,$3 /* E0 */ << 53 beq $3,aligned /* .. E1 (note << 54 << 55 ldq_u $4,0($16) /* E0 */ << 56 bis $16,$16,$5 /* .. E1 */ << 57 insql $17,$16,$2 /* E0 */ << 58 subq $3,8,$3 /* .. E1 */ << 59 << 60 addq $18,$3,$18 /* E0 $18 is << 61 mskql $4,$16,$4 /* .. E1 (and << 62 subq $16,$3,$16 /* E0 $16 is << 63 bis $2,$4,$1 /* .. E1 */ << 64 << 65 bis $31,$31,$31 /* E0 */ << 66 ldq_u $31,0($30) /* .. E1 */ << 67 stq_u $1,0($5) /* E0 */ << 68 bis $31,$31,$31 /* .. E1 */ << 69 << 70 .align 4 << 71 aligned: << 72 sra $18,3,$3 /* E0 */ << 73 and $18,7,$18 /* .. E1 */ << 74 bis $16,$16,$5 /* E0 */ << 75 beq $3,no_quad /* .. E1 */ << 76 << 77 .align 3 << 78 loop: << 79 stq $17,0($5) /* E0 */ << 80 subq $3,1,$3 /* .. E1 */ << 81 addq $5,8,$5 /* E0 */ << 82 bne $3,loop /* .. E1 */ << 83 << 84 no_quad: << 85 bis $31,$31,$31 /* E0 */ << 86 beq $18,end /* .. E1 */ << 87 ldq $7,0($5) /* E0 */ << 88 mskqh $7,$6,$2 /* .. E1 (and << 89 << 90 insqh $17,$6,$4 /* E0 */ << 91 bis $2,$4,$1 /* .. E1 */ << 92 stq $1,0($5) /* E0 */ << 93 ret $31,($26),1 /* .. E1 */ << 94 << 95 .align 3 << 96 within_one_quad: << 97 ldq_u $1,0($16) /* E0 */ << 98 insql $17,$16,$2 /* E1 */ << 99 mskql $1,$16,$4 /* E0 (after l << 100 bis $2,$4,$2 /* E0 */ << 101 << 102 mskql $2,$6,$4 /* E0 */ << 103 mskqh $1,$6,$2 /* .. E1 */ << 104 bis $2,$4,$1 /* E0 */ << 105 stq_u $1,0($16) /* E0 */ << 106 << 107 end: << 108 ret $31,($26),1 /* E1 */ << 109 .end ___memset << 110 EXPORT_SYMBOL(___memset) << 111 EXPORT_SYMBOL(__constant_c_memset) << 112 << 113 .align 5 << 114 .ent __memset16 << 115 __memset16: << 116 .prologue 0 << 117 << 118 inswl $17,0,$1 /* E0 */ << 119 inswl $17,2,$2 /* E0 */ << 120 inswl $17,4,$3 /* E0 */ << 121 or $1,$2,$1 /* .. E1 */ << 122 inswl $17,6,$4 /* E0 */ << 123 or $1,$3,$1 /* .. E1 */ << 124 or $1,$4,$17 /* E0 */ << 125 br __constant_c_memset /* .. E1 */ << 126 11 127 .end __memset16 !! 12 #include <linux/export.h> 128 EXPORT_SYMBOL(__memset16) !! 13 #include <asm/ptrace.h> 129 14 130 memset = ___memset !! 15 /* Work around cpp -rob */ 131 __memset = ___memset !! 16 #define ALLOC #alloc >> 17 #define EXECINSTR #execinstr >> 18 #define EX(x,y,a,b) \ >> 19 98: x,y; \ >> 20 .section .fixup,ALLOC,EXECINSTR; \ >> 21 .align 4; \ >> 22 99: retl; \ >> 23 a, b, %o0; \ >> 24 .section __ex_table,ALLOC; \ >> 25 .align 4; \ >> 26 .word 98b, 99b; \ >> 27 .text; \ >> 28 .align 4 >> 29 >> 30 #define STORE(source, base, offset, n) \ >> 31 98: std source, [base + offset + n]; \ >> 32 .section .fixup,ALLOC,EXECINSTR; \ >> 33 .align 4; \ >> 34 99: ba 30f; \ >> 35 sub %o3, n - offset, %o3; \ >> 36 .section __ex_table,ALLOC; \ >> 37 .align 4; \ >> 38 .word 98b, 99b; \ >> 39 .text; \ >> 40 .align 4; >> 41 >> 42 #define STORE_LAST(source, base, offset, n) \ >> 43 EX(std source, [base - offset - n], \ >> 44 add %o1, offset + n); >> 45 >> 46 /* Please don't change these macros, unless you change the logic >> 47 * in the .fixup section below as well. >> 48 * Store 64 bytes at (BASE + OFFSET) using value SOURCE. */ >> 49 #define ZERO_BIG_BLOCK(base, offset, source) \ >> 50 STORE(source, base, offset, 0x00); \ >> 51 STORE(source, base, offset, 0x08); \ >> 52 STORE(source, base, offset, 0x10); \ >> 53 STORE(source, base, offset, 0x18); \ >> 54 STORE(source, base, offset, 0x20); \ >> 55 STORE(source, base, offset, 0x28); \ >> 56 STORE(source, base, offset, 0x30); \ >> 57 STORE(source, base, offset, 0x38); >> 58 >> 59 #define ZERO_LAST_BLOCKS(base, offset, source) \ >> 60 STORE_LAST(source, base, offset, 0x38); \ >> 61 STORE_LAST(source, base, offset, 0x30); \ >> 62 STORE_LAST(source, base, offset, 0x28); \ >> 63 STORE_LAST(source, base, offset, 0x20); \ >> 64 STORE_LAST(source, base, offset, 0x18); \ >> 65 STORE_LAST(source, base, offset, 0x10); \ >> 66 STORE_LAST(source, base, offset, 0x08); \ >> 67 STORE_LAST(source, base, offset, 0x00); >> 68 >> 69 .text >> 70 .align 4 >> 71 >> 72 .globl __bzero_begin >> 73 __bzero_begin: >> 74 >> 75 .globl __bzero >> 76 .type __bzero,#function >> 77 .globl memset >> 78 EXPORT_SYMBOL(__bzero) 132 EXPORT_SYMBOL(memset) 79 EXPORT_SYMBOL(memset) 133 EXPORT_SYMBOL(__memset) !! 80 memset: >> 81 mov %o0, %g1 >> 82 mov 1, %g4 >> 83 and %o1, 0xff, %g3 >> 84 sll %g3, 8, %g2 >> 85 or %g3, %g2, %g3 >> 86 sll %g3, 16, %g2 >> 87 or %g3, %g2, %g3 >> 88 b 1f >> 89 mov %o2, %o1 >> 90 3: >> 91 cmp %o2, 3 >> 92 be 2f >> 93 EX(stb %g3, [%o0], sub %o1, 0) >> 94 >> 95 cmp %o2, 2 >> 96 be 2f >> 97 EX(stb %g3, [%o0 + 0x01], sub %o1, 1) >> 98 >> 99 EX(stb %g3, [%o0 + 0x02], sub %o1, 2) >> 100 2: >> 101 sub %o2, 4, %o2 >> 102 add %o1, %o2, %o1 >> 103 b 4f >> 104 sub %o0, %o2, %o0 >> 105 >> 106 __bzero: >> 107 clr %g4 >> 108 mov %g0, %g3 >> 109 1: >> 110 cmp %o1, 7 >> 111 bleu 7f >> 112 andcc %o0, 3, %o2 >> 113 >> 114 bne 3b >> 115 4: >> 116 andcc %o0, 4, %g0 >> 117 >> 118 be 2f >> 119 mov %g3, %g2 >> 120 >> 121 EX(st %g3, [%o0], sub %o1, 0) >> 122 sub %o1, 4, %o1 >> 123 add %o0, 4, %o0 >> 124 2: >> 125 andcc %o1, 0xffffff80, %o3 ! Now everything is 8 aligned and o1 is len to run >> 126 be 9f >> 127 andcc %o1, 0x78, %o2 >> 128 10: >> 129 ZERO_BIG_BLOCK(%o0, 0x00, %g2) >> 130 subcc %o3, 128, %o3 >> 131 ZERO_BIG_BLOCK(%o0, 0x40, %g2) >> 132 bne 10b >> 133 add %o0, 128, %o0 >> 134 >> 135 orcc %o2, %g0, %g0 >> 136 9: >> 137 be 13f >> 138 andcc %o1, 7, %o1 >> 139 >> 140 srl %o2, 1, %o3 >> 141 set 13f, %o4 >> 142 sub %o4, %o3, %o4 >> 143 jmp %o4 >> 144 add %o0, %o2, %o0 >> 145 >> 146 ZERO_LAST_BLOCKS(%o0, 0x48, %g2) >> 147 ZERO_LAST_BLOCKS(%o0, 0x08, %g2) >> 148 13: >> 149 be 8f >> 150 andcc %o1, 4, %g0 >> 151 >> 152 be 1f >> 153 andcc %o1, 2, %g0 >> 154 >> 155 EX(st %g3, [%o0], and %o1, 7) >> 156 add %o0, 4, %o0 >> 157 1: >> 158 be 1f >> 159 andcc %o1, 1, %g0 >> 160 >> 161 EX(sth %g3, [%o0], and %o1, 3) >> 162 add %o0, 2, %o0 >> 163 1: >> 164 bne,a 8f >> 165 EX(stb %g3, [%o0], and %o1, 1) >> 166 8: >> 167 b 0f >> 168 nop >> 169 7: >> 170 be 13b >> 171 orcc %o1, 0, %g0 >> 172 >> 173 be 0f >> 174 8: >> 175 add %o0, 1, %o0 >> 176 subcc %o1, 1, %o1 >> 177 bne 8b >> 178 EX(stb %g3, [%o0 - 1], add %o1, 1) >> 179 0: >> 180 andcc %g4, 1, %g0 >> 181 be 5f >> 182 nop >> 183 retl >> 184 mov %g1, %o0 >> 185 5: >> 186 retl >> 187 clr %o0 >> 188 >> 189 .section .fixup,#alloc,#execinstr >> 190 .align 4 >> 191 30: >> 192 and %o1, 0x7f, %o1 >> 193 retl >> 194 add %o3, %o1, %o0 >> 195 >> 196 .globl __bzero_end >> 197 __bzero_end:

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TOMOYO Linux Cross Reference
Linux/arch/alpha/lib/memset.S

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Differences between /arch/alpha/lib/memset.S (Architecture alpha) and /arch/sparc/lib/memset.S (Architecture sparc)

TOMOYO Linux Cross Reference Linux/arch/alpha/lib/memset.S

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Differences between /arch/alpha/lib/memset.S (Architecture alpha) and /arch/sparc/lib/memset.S (Architecture sparc)

TOMOYO Linux Cross Reference
Linux/arch/alpha/lib/memset.S