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-rw-r--r--arch/x86_64/lib/clear_page.S38
-rw-r--r--arch/x86_64/lib/copy_page.S87
-rw-r--r--arch/x86_64/lib/memcpy.S93
-rw-r--r--arch/x86_64/lib/memset.S94
4 files changed, 2 insertions, 310 deletions
diff --git a/arch/x86_64/lib/clear_page.S b/arch/x86_64/lib/clear_page.S
index 30a9da458c15..43d9fa136180 100644
--- a/arch/x86_64/lib/clear_page.S
+++ b/arch/x86_64/lib/clear_page.S
@@ -5,46 +5,8 @@
5 .globl clear_page 5 .globl clear_page
6 .p2align 4 6 .p2align 4
7clear_page: 7clear_page:
8 xorl %eax,%eax
9 movl $4096/64,%ecx
10 .p2align 4
11.Lloop:
12 decl %ecx
13#define PUT(x) movq %rax,x*8(%rdi)
14 movq %rax,(%rdi)
15 PUT(1)
16 PUT(2)
17 PUT(3)
18 PUT(4)
19 PUT(5)
20 PUT(6)
21 PUT(7)
22 leaq 64(%rdi),%rdi
23 jnz .Lloop
24 nop
25 ret
26clear_page_end:
27
28 /* C stepping K8 run faster using the string instructions.
29 It is also a lot simpler. Use this when possible */
30
31#include <asm/cpufeature.h>
32
33 .section .altinstructions,"a"
34 .align 8
35 .quad clear_page
36 .quad clear_page_c
37 .byte X86_FEATURE_K8_C
38 .byte clear_page_end-clear_page
39 .byte clear_page_c_end-clear_page_c
40 .previous
41
42 .section .altinstr_replacement,"ax"
43clear_page_c:
44 movl $4096/8,%ecx 8 movl $4096/8,%ecx
45 xorl %eax,%eax 9 xorl %eax,%eax
46 rep 10 rep
47 stosq 11 stosq
48 ret 12 ret
49clear_page_c_end:
50 .previous
diff --git a/arch/x86_64/lib/copy_page.S b/arch/x86_64/lib/copy_page.S
index dd3aa47b6bf5..621a19769406 100644
--- a/arch/x86_64/lib/copy_page.S
+++ b/arch/x86_64/lib/copy_page.S
@@ -8,94 +8,7 @@
8 .globl copy_page 8 .globl copy_page
9 .p2align 4 9 .p2align 4
10copy_page: 10copy_page:
11 subq $3*8,%rsp
12 movq %rbx,(%rsp)
13 movq %r12,1*8(%rsp)
14 movq %r13,2*8(%rsp)
15
16 movl $(4096/64)-5,%ecx
17 .p2align 4
18.Loop64:
19 dec %rcx
20
21 movq (%rsi), %rax
22 movq 8 (%rsi), %rbx
23 movq 16 (%rsi), %rdx
24 movq 24 (%rsi), %r8
25 movq 32 (%rsi), %r9
26 movq 40 (%rsi), %r10
27 movq 48 (%rsi), %r11
28 movq 56 (%rsi), %r12
29
30 prefetcht0 5*64(%rsi)
31
32 movq %rax, (%rdi)
33 movq %rbx, 8 (%rdi)
34 movq %rdx, 16 (%rdi)
35 movq %r8, 24 (%rdi)
36 movq %r9, 32 (%rdi)
37 movq %r10, 40 (%rdi)
38 movq %r11, 48 (%rdi)
39 movq %r12, 56 (%rdi)
40
41 leaq 64 (%rsi), %rsi
42 leaq 64 (%rdi), %rdi
43
44 jnz .Loop64
45
46 movl $5,%ecx
47 .p2align 4
48.Loop2:
49 decl %ecx
50
51 movq (%rsi), %rax
52 movq 8 (%rsi), %rbx
53 movq 16 (%rsi), %rdx
54 movq 24 (%rsi), %r8
55 movq 32 (%rsi), %r9
56 movq 40 (%rsi), %r10
57 movq 48 (%rsi), %r11
58 movq 56 (%rsi), %r12
59
60 movq %rax, (%rdi)
61 movq %rbx, 8 (%rdi)
62 movq %rdx, 16 (%rdi)
63 movq %r8, 24 (%rdi)
64 movq %r9, 32 (%rdi)
65 movq %r10, 40 (%rdi)
66 movq %r11, 48 (%rdi)
67 movq %r12, 56 (%rdi)
68
69 leaq 64(%rdi),%rdi
70 leaq 64(%rsi),%rsi
71
72 jnz .Loop2
73
74 movq (%rsp),%rbx
75 movq 1*8(%rsp),%r12
76 movq 2*8(%rsp),%r13
77 addq $3*8,%rsp
78 ret
79
80 /* C stepping K8 run faster using the string copy instructions.
81 It is also a lot simpler. Use this when possible */
82
83#include <asm/cpufeature.h>
84
85 .section .altinstructions,"a"
86 .align 8
87 .quad copy_page
88 .quad copy_page_c
89 .byte X86_FEATURE_K8_C
90 .byte copy_page_c_end-copy_page_c
91 .byte copy_page_c_end-copy_page_c
92 .previous
93
94 .section .altinstr_replacement,"ax"
95copy_page_c:
96 movl $4096/8,%ecx 11 movl $4096/8,%ecx
97 rep 12 rep
98 movsq 13 movsq
99 ret 14 ret
100copy_page_c_end:
101 .previous
diff --git a/arch/x86_64/lib/memcpy.S b/arch/x86_64/lib/memcpy.S
index c6c46494fef5..92dd80544602 100644
--- a/arch/x86_64/lib/memcpy.S
+++ b/arch/x86_64/lib/memcpy.S
@@ -11,6 +11,8 @@
11 * 11 *
12 * Output: 12 * Output:
13 * rax original destination 13 * rax original destination
14 *
15 * TODO: check best memcpy for PSC
14 */ 16 */
15 17
16 .globl __memcpy 18 .globl __memcpy
@@ -18,95 +20,6 @@
18 .p2align 4 20 .p2align 4
19__memcpy: 21__memcpy:
20memcpy: 22memcpy:
21 pushq %rbx
22 movq %rdi,%rax
23
24 movl %edx,%ecx
25 shrl $6,%ecx
26 jz .Lhandle_tail
27
28 .p2align 4
29.Lloop_64:
30 decl %ecx
31
32 movq (%rsi),%r11
33 movq 8(%rsi),%r8
34
35 movq %r11,(%rdi)
36 movq %r8,1*8(%rdi)
37
38 movq 2*8(%rsi),%r9
39 movq 3*8(%rsi),%r10
40
41 movq %r9,2*8(%rdi)
42 movq %r10,3*8(%rdi)
43
44 movq 4*8(%rsi),%r11
45 movq 5*8(%rsi),%r8
46
47 movq %r11,4*8(%rdi)
48 movq %r8,5*8(%rdi)
49
50 movq 6*8(%rsi),%r9
51 movq 7*8(%rsi),%r10
52
53 movq %r9,6*8(%rdi)
54 movq %r10,7*8(%rdi)
55
56 leaq 64(%rsi),%rsi
57 leaq 64(%rdi),%rdi
58 jnz .Lloop_64
59
60.Lhandle_tail:
61 movl %edx,%ecx
62 andl $63,%ecx
63 shrl $3,%ecx
64 jz .Lhandle_7
65 .p2align 4
66.Lloop_8:
67 decl %ecx
68 movq (%rsi),%r8
69 movq %r8,(%rdi)
70 leaq 8(%rdi),%rdi
71 leaq 8(%rsi),%rsi
72 jnz .Lloop_8
73
74.Lhandle_7:
75 movl %edx,%ecx
76 andl $7,%ecx
77 jz .Lende
78 .p2align 4
79.Lloop_1:
80 movb (%rsi),%r8b
81 movb %r8b,(%rdi)
82 incq %rdi
83 incq %rsi
84 decl %ecx
85 jnz .Lloop_1
86
87.Lende:
88 popq %rbx
89 ret
90.Lfinal:
91
92 /* C stepping K8 run faster using the string copy instructions.
93 It is also a lot simpler. Use this when possible */
94
95 .section .altinstructions,"a"
96 .align 8
97 .quad memcpy
98 .quad memcpy_c
99 .byte X86_FEATURE_K8_C
100 .byte .Lfinal-memcpy
101 .byte memcpy_c_end-memcpy_c
102 .previous
103
104 .section .altinstr_replacement,"ax"
105 /* rdi destination
106 * rsi source
107 * rdx count
108 */
109memcpy_c:
110 movq %rdi,%rax 23 movq %rdi,%rax
111 movl %edx,%ecx 24 movl %edx,%ecx
112 shrl $3,%ecx 25 shrl $3,%ecx
@@ -117,5 +30,3 @@ memcpy_c:
117 rep 30 rep
118 movsb 31 movsb
119 ret 32 ret
120memcpy_c_end:
121 .previous
diff --git a/arch/x86_64/lib/memset.S b/arch/x86_64/lib/memset.S
index 4b4c40638640..2aa48f24ed1e 100644
--- a/arch/x86_64/lib/memset.S
+++ b/arch/x86_64/lib/memset.S
@@ -13,98 +13,6 @@
13 .p2align 4 13 .p2align 4
14memset: 14memset:
15__memset: 15__memset:
16 movq %rdi,%r10
17 movq %rdx,%r11
18
19 /* expand byte value */
20 movzbl %sil,%ecx
21 movabs $0x0101010101010101,%rax
22 mul %rcx /* with rax, clobbers rdx */
23
24 /* align dst */
25 movl %edi,%r9d
26 andl $7,%r9d
27 jnz .Lbad_alignment
28.Lafter_bad_alignment:
29
30 movl %r11d,%ecx
31 shrl $6,%ecx
32 jz .Lhandle_tail
33
34 .p2align 4
35.Lloop_64:
36 decl %ecx
37 movq %rax,(%rdi)
38 movq %rax,8(%rdi)
39 movq %rax,16(%rdi)
40 movq %rax,24(%rdi)
41 movq %rax,32(%rdi)
42 movq %rax,40(%rdi)
43 movq %rax,48(%rdi)
44 movq %rax,56(%rdi)
45 leaq 64(%rdi),%rdi
46 jnz .Lloop_64
47
48 /* Handle tail in loops. The loops should be faster than hard
49 to predict jump tables. */
50 .p2align 4
51.Lhandle_tail:
52 movl %r11d,%ecx
53 andl $63&(~7),%ecx
54 jz .Lhandle_7
55 shrl $3,%ecx
56 .p2align 4
57.Lloop_8:
58 decl %ecx
59 movq %rax,(%rdi)
60 leaq 8(%rdi),%rdi
61 jnz .Lloop_8
62
63.Lhandle_7:
64 movl %r11d,%ecx
65 andl $7,%ecx
66 jz .Lende
67 .p2align 4
68.Lloop_1:
69 decl %ecx
70 movb %al,(%rdi)
71 leaq 1(%rdi),%rdi
72 jnz .Lloop_1
73
74.Lende:
75 movq %r10,%rax
76 ret
77
78.Lbad_alignment:
79 cmpq $7,%r11
80 jbe .Lhandle_7
81 movq %rax,(%rdi) /* unaligned store */
82 movq $8,%r8
83 subq %r9,%r8
84 addq %r8,%rdi
85 subq %r8,%r11
86 jmp .Lafter_bad_alignment
87
88 /* C stepping K8 run faster using the string instructions.
89 It is also a lot simpler. Use this when possible */
90
91#include <asm/cpufeature.h>
92
93 .section .altinstructions,"a"
94 .align 8
95 .quad memset
96 .quad memset_c
97 .byte X86_FEATURE_K8_C
98 .byte memset_c_end-memset_c
99 .byte memset_c_end-memset_c
100 .previous
101
102 .section .altinstr_replacement,"ax"
103 /* rdi destination
104 * rsi value
105 * rdx count
106 */
107memset_c:
108 movq %rdi,%r9 16 movq %rdi,%r9
109 movl %edx,%r8d 17 movl %edx,%r8d
110 andl $7,%r8d 18 andl $7,%r8d
@@ -121,5 +29,3 @@ memset_c:
121 stosb 29 stosb
122 movq %r9,%rax 30 movq %r9,%rax
123 ret 31 ret
124memset_c_end:
125 .previous
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