68 lines
894 B
ArmAsm
68 lines
894 B
ArmAsm
.text
|
|
|
|
/*
|
|
* cmpMemory.
|
|
*
|
|
* rdi - r1 length
|
|
* rsi - r1 data.
|
|
* rdx - r2 length.
|
|
* rcx - r2 data.
|
|
*/
|
|
.globl _D5tanya6memory2op9cmpMemoryFNaNbNixAvxQdZi
|
|
.type _D5tanya6memory2op9cmpMemoryFNaNbNixAvxQdZi, @function
|
|
_D5tanya6memory2op9cmpMemoryFNaNbNixAvxQdZi:
|
|
// 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
|