Function at 0x1400c7020
Capabilities:
Validate payment card number using luhn algorithm

Disassembly:
mov qword [rsp + 0x18], r8
mov qword [rsp + 8], rcx
push rbx
push rbp
push rsi
push rdi
push r14
push r15
sub rsp, 0x78
mov rbx, rdx
movaps xmmword [rsp + 0x50], xmm6
mov rdx, rcx
movaps xmmword [rsp + 0x40], xmm7
movaps xmmword [rsp + 0x30], xmm8
xorps xmm6, xmm6
xorps xmm8, xmm8
mov rax, qword [rbx + 0x28]
mov rcx, qword [rbx + 0x38]
sub rcx, qword [rbx + 0x10]
add rcx, rax
cmp byte [rax], 0x2d
mov qword [rsp + 0x20], rcx
jne 0x1400c7081
mov rcx, rbx
call fcn.1400c53b0
mov rdx, qword [rsp + 0xb0]
mov r15b, 1
jmp 0x1400c7084
xor r15b, r15b
mov rcx, qword [rbx + 0x28]
xor r14d, r14d
movsd xmm7, qword [0x1405a9cc8]
mov esi, r14d
mov qword [rsp + 0x70], r12
mov ebp, r14d
mov byte [rsp + 0xc8], r15b
movsx edi, byte [rcx]
mov qword [rsp + 0x68], r13
mov byte [rsp + 0xb8], sil
cmp dil, 0x30
jne 0x1400c70cf
mov rcx, rbx
mov r12d, r14d
call fcn.1400c53b0
xor r13b, r13b
jmp 0x1400c72c2
lea eax, [rdi - 0x31]
cmp al, 8
ja 0x1400c766b
mov rcx, rbx
call fcn.1400c53b0
mov rcx, qword [rbx + 0x28]
lea r12d, [rdi - 0x30]
movzx edi, byte [rcx]
test r15b, r15b
je 0x1400c7145
cmp dil, 0x30
jl 0x1400c719c
nop dword [rax]
cmp dil, 0x39
ja 0x1400c719c
cmp r12d, 0xccccccc
jb 0x1400c711b
jne 0x1400c7191
cmp dil, 0x38
ja 0x1400c7191
mov rcx, rbx
call fcn.1400c53b0
lea ecx, [r12 - 6]
movzx eax, dil
lea ecx, [r12 + rcx*4]
inc ebp
lea r12d, [rax + rcx*2]
mov rcx, qword [rbx + 0x28]
movzx edi, byte [rcx]
cmp dil, 0x30
jge 0x1400c7100
jmp 0x1400c719c
cmp dil, 0x30
jl 0x1400c719c
nop dword [rax + rax]
cmp dil, 0x39
ja 0x1400c719c
cmp r12d, 0x19999999
jb 0x1400c7167
jne 0x1400c7191
cmp dil, 0x35
ja 0x1400c7191
mov rcx, rbx
call fcn.1400c53b0
lea ecx, [r12 - 6]
movzx eax, dil
lea ecx, [r12 + rcx*4]
inc ebp
lea r12d, [rax + rcx*2]
mov rcx, qword [rbx + 0x28]
movzx edi, byte [rcx]
cmp dil, 0x30
jge 0x1400c7150
jmp 0x1400c719c
mov byte [rsp + 0xb8], 1
mov esi, r12d
xor r13b, r13b
cmp byte [rsp + 0xb8], r13b
je 0x1400c72c2
cmp byte [rcx], 0x30
jl 0x1400c72c2
movzx edi, byte [rcx]
test r15b, r15b
je 0x1400c7227
movabs r15, 0xccccccccccccccc
nop dword [rax + rax]
cmp dil, 0x39
ja 0x1400c72c2
cmp rsi, r15
jb 0x1400c71e7
jne 0x1400c7212
cmp dil, 0x38
ja 0x1400c7212
mov rcx, rbx
call fcn.1400c53b0
movzx ecx, dil
lea rax, [rsi + rsi*4]
sub ecx, 0x30
inc ebp
lea rsi, [rcx + rax*2]
mov rcx, qword [rbx + 0x28]
movzx edi, byte [rcx]
cmp dil, 0x30
jge 0x1400c71d0
jmp 0x1400c72c2
mov rdx, rsi
mov r13b, 1
xorps xmm6, xmm6
test rdx, rdx
js 0x1400c7273
cvtsi2sd xmm6, rdx
jmp 0x1400c7288
movabs r15, 0x1999999999999999
mov rdx, rsi
cmp dil, 0x39
ja 0x1400c72c2
cmp rsi, r15
jb 0x1400c724b
jne 0x1400c7215
cmp dil, 0x35
ja 0x1400c7215
mov rcx, rbx
call fcn.1400c53b0
movzx ecx, dil
lea rax, [rsi + rsi*4]
sub ecx, 0x30
inc ebp
lea rsi, [rcx + rax*2]
mov rcx, qword [rbx + 0x28]
movzx edi, byte [rcx]
cmp dil, 0x30
jge 0x1400c7231
jmp 0x1400c72c2
mov rax, rdx
and edx, 1
shr rax, 1
or rax, rdx
cvtsi2sd xmm6, rax
addsd xmm6, xmm6
cmp byte [rcx], 0x30
jl 0x1400c72c2
movzx edi, byte [rcx]
cmp dil, 0x39
ja 0x1400c72c2
mov rcx, rbx
call fcn.1400c53b0
movzx eax, dil
sub eax, 0x30
mulsd xmm6, xmm7
movd xmm0, eax
mov rax, qword [rbx + 0x28]
cvtdq2pd xmm0, xmm0
movzx edi, byte [rax]
addsd xmm6, xmm0
cmp dil, 0x30
jge 0x1400c7290
mov rdx, qword [rbx + 0x28]
mov r15d, r14d
cmp byte [rdx], 0x2e
jne 0x1400c738c
mov rcx, rbx
call fcn.1400c53b0
mov rcx, qword [rbx + 0x28]
movzx edi, byte [rcx]
lea eax, [rdi - 0x30]
cmp al, 9
ja 0x1400c741c
test r13b, r13b
jne 0x1400c73ce
cmp byte [rsp + 0xb8], r14b
jne 0x1400c7302
mov esi, r12d
mov rax, rcx
movabs r13, 0x1fffffffffffff
nop
mov r8, rcx
mov rdx, rax
cmp dil, 0x39
ja 0x1400c7358
cmp rsi, r13
ja 0x1400c7358
mov rcx, rbx
call fcn.1400c53b0
movzx ecx, dil
lea rax, [rsi + rsi*4]
sub ecx, 0x30
dec r15d
lea rsi, [rcx + rax*2]
test rsi, rsi
je 0x1400c7342
inc ebp
mov rcx, qword [rbx + 0x28]
mov rax, rcx
mov r8, rcx
mov rdx, rcx
movzx edi, byte [rcx]
cmp dil, 0x30
jge 0x1400c7310
xorps xmm6, xmm6
test rsi, rsi
js 0x1400c7367
cvtsi2sd xmm6, rsi
jmp 0x1400c737f
mov rax, rsi
mov rcx, rsi
shr rcx, 1
and eax, 1
or rcx, rax
cvtsi2sd xmm6, rcx
addsd xmm6, xmm6
movzx edi, byte [r8]
mov r13b, 1
cmp dil, 0x30
jge 0x1400c73d1
movzx eax, byte [rdx]
cmp al, 0x65
je 0x1400c739b
cmp al, 0x45
jne 0x1400c752c
mov rcx, rbx
call fcn.1400c53b0
test r13b, r13b
jne 0x1400c7457
mov rcx, rsi
cmp byte [rsp + 0xb8], r14b
jne 0x1400c73bc
mov ecx, r12d
xorps xmm6, xmm6
test rcx, rcx
js 0x1400c743f
cvtsi2sd xmm6, rcx
jmp 0x1400c7454
mov rdx, rcx
cmp dil, 0x39
ja 0x1400c738c
mov rcx, rbx
call fcn.1400c53b0
cmp ebp, 0x11
jge 0x1400c740a
mulsd xmm6, xmm7
dec r15d
movzx eax, dil
sub eax, 0x30
movd xmm0, eax
cvtdq2pd xmm0, xmm0
addsd xmm0, xmm6
comisd xmm0, xmm8
movaps xmm6, xmm0
jbe 0x1400c740a
inc ebp
mov rdx, qword [rbx + 0x28]
movzx edi, byte [rdx]
cmp dil, 0x30
jge 0x1400c73d1
jmp 0x1400c738c
mov rax, qword [rbx + 0x38]
sub rax, qword [rbx + 0x10]
add rax, rcx
mov rcx, qword [rsp + 0xb0]
mov dword [rcx + 0x30], 0xe
mov qword [rcx + 0x38], rax
jmp 0x1400c7681
mov rax, rcx
and ecx, 1
shr rax, 1
or rax, rcx
cvtsi2sd xmm6, rax
addsd xmm6, xmm6
mov r13b, 1
mov rcx, qword [rbx + 0x28]
xor bpl, bpl
movzx edi, byte [rcx]
cmp dil, 0x2b
jne 0x1400c7471
mov rcx, rbx
call fcn.1400c53b0
jmp 0x1400c7482
cmp dil, 0x2d
jne 0x1400c7489
mov rcx, rbx
call fcn.1400c53b0
mov bpl, 1
mov rcx, qword [rbx + 0x28]
movzx edi, byte [rcx]
lea eax, [rdi - 0x30]
cmp al, 9
ja 0x1400c75b5
mov rcx, rbx
call fcn.1400c53b0
mov rax, qword [rbx + 0x28]
movsx r14d, dil
sub r14d, 0x30
movzx edi, byte [rax]
test bpl, bpl
je 0x1400c756c
lea ecx, [r15 + 0x7ffffff7]
mov eax, 0x66666667
imul ecx
mov ebp, edx
sar ebp, 2
mov eax, ebp
shr eax, 0x1f
add ebp, eax
cmp dil, 0x30
jl 0x1400c7529
cmp dil, 0x39
ja 0x1400c7529
mov rcx, rbx
call fcn.1400c53b0
lea r14d, [r14 + r14*4]
movzx eax, dil
lea r14d, [r14 - 0x18]
lea r14d, [rax + r14*2]
cmp r14d, ebp
jle 0x1400c751c
mov rax, qword [rbx + 0x28]
movzx ecx, byte [rax]
cmp cl, 0x30
jl 0x1400c751c
cmp cl, 0x39
ja 0x1400c751c
mov rcx, rbx
call fcn.1400c53b0
mov rax, qword [rbx + 0x28]
movzx ecx, byte [rax]
cmp cl, 0x30
jge 0x1400c7503
mov rax, qword [rbx + 0x28]
movzx edi, byte [rax]
cmp dil, 0x30
jge 0x1400c74d4
neg r14d
test r13b, r13b
je 0x1400c75fb
lea edx, [r14 + r15]
movaps xmm0, xmm6
call fcn.140021940
comisd xmm0, xmmword [0x1405a9d48]
jbe 0x1400c75d8
mov rcx, qword [rsp + 0xb0]
mov rax, qword [rsp + 0x20]
mov dword [rcx + 0x30], 0xd
mov qword [rcx + 0x38], rax
jmp 0x1400c7681
mov ebp, 0x134
sub ebp, r15d
cmp dil, 0x30
jl 0x1400c752c
nop word [rax + rax]
cmp dil, 0x39
ja 0x1400c752c
mov rcx, rbx
call fcn.1400c53b0
lea r14d, [r14 + r14*4]
movzx eax, dil
lea r14d, [r14 - 0x18]
lea r14d, [rax + r14*2]
cmp r14d, ebp
jg 0x1400c754f
mov rax, qword [rbx + 0x28]
movzx edi, byte [rax]
cmp dil, 0x30
jge 0x1400c7580
jmp 0x1400c752c
mov rax, qword [rbx + 0x38]
sub rax, qword [rbx + 0x10]
add rax, rcx
mov rcx, qword [rsp + 0xb0]
mov dword [rcx + 0x30], 0xf
mov qword [rcx + 0x38], rax
jmp 0x1400c7681
cmp byte [rsp + 0xc8], 0
je 0x1400c75e9
xorps xmm0, xmmword [0x1405aa230]
mov rcx, qword [rsp + 0xc0]
movaps xmm1, xmm0
call fcn.1400251b0
jmp 0x1400c764d
cmp byte [rsp + 0xb8], 0
mov rcx, qword [rsp + 0xc0]
je 0x1400c762e
cmp byte [rsp + 0xc8], 0
je 0x1400c7624
neg rsi
mov rdx, rsi
call fcn.1400252a0
jmp 0x1400c764d
mov rdx, rsi
call fcn.140025210
jmp 0x1400c764d
cmp byte [rsp + 0xc8], 0
je 0x1400c7645
neg r12d
mov edx, r12d
call fcn.1400253b0
jmp 0x1400c764d
mov edx, r12d
call fcn.140025350
test al, al
jne 0x1400c7681
mov rcx, qword [rsp + 0xb0]
mov rax, qword [rsp + 0x20]
mov dword [rcx + 0x30], 0x10
mov qword [rcx + 0x38], rax
jmp 0x1400c7681
mov rax, qword [rbx + 0x38]
sub rax, qword [rbx + 0x10]
add rax, rcx
mov dword [rdx + 0x30], 3
mov qword [rdx + 0x38], rax
mov r13, qword [rsp + 0x68]
mov r12, qword [rsp + 0x70]
movaps xmm6, xmmword [rsp + 0x50]
movaps xmm7, xmmword [rsp + 0x40]
movaps xmm8, xmmword [rsp + 0x30]
add rsp, 0x78
pop r15
pop r14
pop rdi
pop rsi
pop rbp
pop rbx
ret