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
|
.text
/*
* cmpMemory.
*
* rdi - r1 length
* rsi - r1 data.
* rdx - r2 length.
* rcx - r2 data.
*/
.globl _D5tanya6memory2op9cmpMemoryFNaNbNixAvxAvZi
.type _D5tanya6memory2op9cmpMemoryFNaNbNixAvxAvZi, @function
_D5tanya6memory2op9cmpMemoryFNaNbNixAvxAvZi:
// Compare the lengths
cmp %rdx, %rdi
jl less
jg greater
mov %rcx, %rdi
// Check if we're aligned
cmp $0x08, %rdx
jc aligned_1
test $0x07, %edi
jz aligned_8
naligned:
cmpsb
jl less
jg greater
dec %rdx
test $0x07, %edi
jnz naligned
aligned_8:
mov %rdx, %rcx
shr $0x03, %rcx
repe cmpsq
jl less
jg greater
and $0x07, %edx
jz equal
aligned_1: // Compare the remaining bytes
mov %rdx, %rcx
cmp $0x0, %rcx
repe cmpsb
jl less
jg greater
equal:
xor %rax, %rax // Return 0
jmp end
greater:
mov $0x01, %rax
jmp end
less:
mov $-0x01, %rax
end:
ret
|
