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-rw-r--r--arch/x86/lib/csum-copy_64.S242
1 files changed, 121 insertions, 121 deletions
diff --git a/arch/x86/lib/csum-copy_64.S b/arch/x86/lib/csum-copy_64.S
index f0dba36578ea..fb903b758da8 100644
--- a/arch/x86/lib/csum-copy_64.S
+++ b/arch/x86/lib/csum-copy_64.S
@@ -1,6 +1,6 @@
1/* 1/*
2 * Copyright 2002,2003 Andi Kleen, SuSE Labs. 2 * Copyright 2002, 2003 Andi Kleen, SuSE Labs.
3 * 3 *
4 * This file is subject to the terms and conditions of the GNU General Public 4 * This file is subject to the terms and conditions of the GNU General Public
5 * License. See the file COPYING in the main directory of this archive 5 * License. See the file COPYING in the main directory of this archive
6 * for more details. No warranty for anything given at all. 6 * for more details. No warranty for anything given at all.
@@ -11,82 +11,82 @@
11 11
12/* 12/*
13 * Checksum copy with exception handling. 13 * Checksum copy with exception handling.
14 * On exceptions src_err_ptr or dst_err_ptr is set to -EFAULT and the 14 * On exceptions src_err_ptr or dst_err_ptr is set to -EFAULT and the
15 * destination is zeroed. 15 * destination is zeroed.
16 * 16 *
17 * Input 17 * Input
18 * rdi source 18 * rdi source
19 * rsi destination 19 * rsi destination
20 * edx len (32bit) 20 * edx len (32bit)
21 * ecx sum (32bit) 21 * ecx sum (32bit)
22 * r8 src_err_ptr (int) 22 * r8 src_err_ptr (int)
23 * r9 dst_err_ptr (int) 23 * r9 dst_err_ptr (int)
24 * 24 *
25 * Output 25 * Output
26 * eax 64bit sum. undefined in case of exception. 26 * eax 64bit sum. undefined in case of exception.
27 * 27 *
28 * Wrappers need to take care of valid exception sum and zeroing. 28 * Wrappers need to take care of valid exception sum and zeroing.
29 * They also should align source or destination to 8 bytes. 29 * They also should align source or destination to 8 bytes.
30 */ 30 */
31 31
32 .macro source 32 .macro source
3310: 3310:
34 .section __ex_table,"a" 34 .section __ex_table, "a"
35 .align 8 35 .align 8
36 .quad 10b,.Lbad_source 36 .quad 10b, .Lbad_source
37 .previous 37 .previous
38 .endm 38 .endm
39 39
40 .macro dest 40 .macro dest
4120: 4120:
42 .section __ex_table,"a" 42 .section __ex_table, "a"
43 .align 8 43 .align 8
44 .quad 20b,.Lbad_dest 44 .quad 20b, .Lbad_dest
45 .previous 45 .previous
46 .endm 46 .endm
47 47
48 .macro ignore L=.Lignore 48 .macro ignore L=.Lignore
4930: 4930:
50 .section __ex_table,"a" 50 .section __ex_table, "a"
51 .align 8 51 .align 8
52 .quad 30b,\L 52 .quad 30b, \L
53 .previous 53 .previous
54 .endm 54 .endm
55 55
56 56
57ENTRY(csum_partial_copy_generic) 57ENTRY(csum_partial_copy_generic)
58 CFI_STARTPROC 58 CFI_STARTPROC
59 cmpl $3*64,%edx 59 cmpl $3*64, %edx
60 jle .Lignore 60 jle .Lignore
61 61
62.Lignore: 62.Lignore:
63 subq $7*8,%rsp 63 subq $7*8, %rsp
64 CFI_ADJUST_CFA_OFFSET 7*8 64 CFI_ADJUST_CFA_OFFSET 7*8
65 movq %rbx,2*8(%rsp) 65 movq %rbx, 2*8(%rsp)
66 CFI_REL_OFFSET rbx, 2*8 66 CFI_REL_OFFSET rbx, 2*8
67 movq %r12,3*8(%rsp) 67 movq %r12, 3*8(%rsp)
68 CFI_REL_OFFSET r12, 3*8 68 CFI_REL_OFFSET r12, 3*8
69 movq %r14,4*8(%rsp) 69 movq %r14, 4*8(%rsp)
70 CFI_REL_OFFSET r14, 4*8 70 CFI_REL_OFFSET r14, 4*8
71 movq %r13,5*8(%rsp) 71 movq %r13, 5*8(%rsp)
72 CFI_REL_OFFSET r13, 5*8 72 CFI_REL_OFFSET r13, 5*8
73 movq %rbp,6*8(%rsp) 73 movq %rbp, 6*8(%rsp)
74 CFI_REL_OFFSET rbp, 6*8 74 CFI_REL_OFFSET rbp, 6*8
75 75
76 movq %r8,(%rsp) 76 movq %r8, (%rsp)
77 movq %r9,1*8(%rsp) 77 movq %r9, 1*8(%rsp)
78
79 movl %ecx,%eax
80 movl %edx,%ecx
81 78
82 xorl %r9d,%r9d 79 movl %ecx, %eax
83 movq %rcx,%r12 80 movl %edx, %ecx
84 81
85 shrq $6,%r12 82 xorl %r9d, %r9d
86 jz .Lhandle_tail /* < 64 */ 83 movq %rcx, %r12
84
85 shrq $6, %r12
86 jz .Lhandle_tail /* < 64 */
87 87
88 clc 88 clc
89 89
90 /* main loop. clear in 64 byte blocks */ 90 /* main loop. clear in 64 byte blocks */
91 /* r9: zero, r8: temp2, rbx: temp1, rax: sum, rcx: saved length */ 91 /* r9: zero, r8: temp2, rbx: temp1, rax: sum, rcx: saved length */
92 /* r11: temp3, rdx: temp4, r12 loopcnt */ 92 /* r11: temp3, rdx: temp4, r12 loopcnt */
@@ -94,156 +94,156 @@ ENTRY(csum_partial_copy_generic)
94 .p2align 4 94 .p2align 4
95.Lloop: 95.Lloop:
96 source 96 source
97 movq (%rdi),%rbx 97 movq (%rdi), %rbx
98 source 98 source
99 movq 8(%rdi),%r8 99 movq 8(%rdi), %r8
100 source 100 source
101 movq 16(%rdi),%r11 101 movq 16(%rdi), %r11
102 source 102 source
103 movq 24(%rdi),%rdx 103 movq 24(%rdi), %rdx
104 104
105 source 105 source
106 movq 32(%rdi),%r10 106 movq 32(%rdi), %r10
107 source 107 source
108 movq 40(%rdi),%rbp 108 movq 40(%rdi), %rbp
109 source 109 source
110 movq 48(%rdi),%r14 110 movq 48(%rdi), %r14
111 source 111 source
112 movq 56(%rdi),%r13 112 movq 56(%rdi), %r13
113 113
114 ignore 2f 114 ignore 2f
115 prefetcht0 5*64(%rdi) 115 prefetcht0 5*64(%rdi)
1162: 1162:
117 adcq %rbx,%rax 117 adcq %rbx, %rax
118 adcq %r8,%rax 118 adcq %r8, %rax
119 adcq %r11,%rax 119 adcq %r11, %rax
120 adcq %rdx,%rax 120 adcq %rdx, %rax
121 adcq %r10,%rax 121 adcq %r10, %rax
122 adcq %rbp,%rax 122 adcq %rbp, %rax
123 adcq %r14,%rax 123 adcq %r14, %rax
124 adcq %r13,%rax 124 adcq %r13, %rax
125 125
126 decl %r12d 126 decl %r12d
127 127
128 dest 128 dest
129 movq %rbx,(%rsi) 129 movq %rbx, (%rsi)
130 dest 130 dest
131 movq %r8,8(%rsi) 131 movq %r8, 8(%rsi)
132 dest 132 dest
133 movq %r11,16(%rsi) 133 movq %r11, 16(%rsi)
134 dest 134 dest
135 movq %rdx,24(%rsi) 135 movq %rdx, 24(%rsi)
136 136
137 dest 137 dest
138 movq %r10,32(%rsi) 138 movq %r10, 32(%rsi)
139 dest 139 dest
140 movq %rbp,40(%rsi) 140 movq %rbp, 40(%rsi)
141 dest 141 dest
142 movq %r14,48(%rsi) 142 movq %r14, 48(%rsi)
143 dest 143 dest
144 movq %r13,56(%rsi) 144 movq %r13, 56(%rsi)
145 145
1463: 1463:
147
148 leaq 64(%rdi),%rdi
149 leaq 64(%rsi),%rsi
150 147
151 jnz .Lloop 148 leaq 64(%rdi), %rdi
149 leaq 64(%rsi), %rsi
152 150
153 adcq %r9,%rax 151 jnz .Lloop
154 152
155 /* do last upto 56 bytes */ 153 adcq %r9, %rax
154
155 /* do last up to 56 bytes */
156.Lhandle_tail: 156.Lhandle_tail:
157 /* ecx: count */ 157 /* ecx: count */
158 movl %ecx,%r10d 158 movl %ecx, %r10d
159 andl $63,%ecx 159 andl $63, %ecx
160 shrl $3,%ecx 160 shrl $3, %ecx
161 jz .Lfold 161 jz .Lfold
162 clc 162 clc
163 .p2align 4 163 .p2align 4
164.Lloop_8: 164.Lloop_8:
165 source 165 source
166 movq (%rdi),%rbx 166 movq (%rdi), %rbx
167 adcq %rbx,%rax 167 adcq %rbx, %rax
168 decl %ecx 168 decl %ecx
169 dest 169 dest
170 movq %rbx,(%rsi) 170 movq %rbx, (%rsi)
171 leaq 8(%rsi),%rsi /* preserve carry */ 171 leaq 8(%rsi), %rsi /* preserve carry */
172 leaq 8(%rdi),%rdi 172 leaq 8(%rdi), %rdi
173 jnz .Lloop_8 173 jnz .Lloop_8
174 adcq %r9,%rax /* add in carry */ 174 adcq %r9, %rax /* add in carry */
175 175
176.Lfold: 176.Lfold:
177 /* reduce checksum to 32bits */ 177 /* reduce checksum to 32bits */
178 movl %eax,%ebx 178 movl %eax, %ebx
179 shrq $32,%rax 179 shrq $32, %rax
180 addl %ebx,%eax 180 addl %ebx, %eax
181 adcl %r9d,%eax 181 adcl %r9d, %eax
182 182
183 /* do last upto 6 bytes */ 183 /* do last up to 6 bytes */
184.Lhandle_7: 184.Lhandle_7:
185 movl %r10d,%ecx 185 movl %r10d, %ecx
186 andl $7,%ecx 186 andl $7, %ecx
187 shrl $1,%ecx 187 shrl $1, %ecx
188 jz .Lhandle_1 188 jz .Lhandle_1
189 movl $2,%edx 189 movl $2, %edx
190 xorl %ebx,%ebx 190 xorl %ebx, %ebx
191 clc 191 clc
192 .p2align 4 192 .p2align 4
193.Lloop_1: 193.Lloop_1:
194 source 194 source
195 movw (%rdi),%bx 195 movw (%rdi), %bx
196 adcl %ebx,%eax 196 adcl %ebx, %eax
197 decl %ecx 197 decl %ecx
198 dest 198 dest
199 movw %bx,(%rsi) 199 movw %bx, (%rsi)
200 leaq 2(%rdi),%rdi 200 leaq 2(%rdi), %rdi
201 leaq 2(%rsi),%rsi 201 leaq 2(%rsi), %rsi
202 jnz .Lloop_1 202 jnz .Lloop_1
203 adcl %r9d,%eax /* add in carry */ 203 adcl %r9d, %eax /* add in carry */
204 204
205 /* handle last odd byte */ 205 /* handle last odd byte */
206.Lhandle_1: 206.Lhandle_1:
207 testl $1,%r10d 207 testl $1, %r10d
208 jz .Lende 208 jz .Lende
209 xorl %ebx,%ebx 209 xorl %ebx, %ebx
210 source 210 source
211 movb (%rdi),%bl 211 movb (%rdi), %bl
212 dest 212 dest
213 movb %bl,(%rsi) 213 movb %bl, (%rsi)
214 addl %ebx,%eax 214 addl %ebx, %eax
215 adcl %r9d,%eax /* carry */ 215 adcl %r9d, %eax /* carry */
216 216
217 CFI_REMEMBER_STATE 217 CFI_REMEMBER_STATE
218.Lende: 218.Lende:
219 movq 2*8(%rsp),%rbx 219 movq 2*8(%rsp), %rbx
220 CFI_RESTORE rbx 220 CFI_RESTORE rbx
221 movq 3*8(%rsp),%r12 221 movq 3*8(%rsp), %r12
222 CFI_RESTORE r12 222 CFI_RESTORE r12
223 movq 4*8(%rsp),%r14 223 movq 4*8(%rsp), %r14
224 CFI_RESTORE r14 224 CFI_RESTORE r14
225 movq 5*8(%rsp),%r13 225 movq 5*8(%rsp), %r13
226 CFI_RESTORE r13 226 CFI_RESTORE r13
227 movq 6*8(%rsp),%rbp 227 movq 6*8(%rsp), %rbp
228 CFI_RESTORE rbp 228 CFI_RESTORE rbp
229 addq $7*8,%rsp 229 addq $7*8, %rsp
230 CFI_ADJUST_CFA_OFFSET -7*8 230 CFI_ADJUST_CFA_OFFSET -7*8
231 ret 231 ret
232 CFI_RESTORE_STATE 232 CFI_RESTORE_STATE
233 233
234 /* Exception handlers. Very simple, zeroing is done in the wrappers */ 234 /* Exception handlers. Very simple, zeroing is done in the wrappers */
235.Lbad_source: 235.Lbad_source:
236 movq (%rsp),%rax 236 movq (%rsp), %rax
237 testq %rax,%rax 237 testq %rax, %rax
238 jz .Lende 238 jz .Lende
239 movl $-EFAULT,(%rax) 239 movl $-EFAULT, (%rax)
240 jmp .Lende 240 jmp .Lende
241 241
242.Lbad_dest: 242.Lbad_dest:
243 movq 8(%rsp),%rax 243 movq 8(%rsp), %rax
244 testq %rax,%rax 244 testq %rax, %rax
245 jz .Lende 245 jz .Lende
246 movl $-EFAULT,(%rax) 246 movl $-EFAULT, (%rax)
247 jmp .Lende 247 jmp .Lende
248 CFI_ENDPROC 248 CFI_ENDPROC
249ENDPROC(csum_partial_copy_generic) 249ENDPROC(csum_partial_copy_generic)