Function at 0x638c0e60
Capabilities:
Encode data using xor

Disassembly:
push ebp
push edi
push esi
push ebx
mov ebx, eax
sub esp, 0x6c
fld xword [esp + 0x80]
fld st(0)
fstp xword [esp + 0x38]
fxam
wait
fnstsw ax
and ax, 0x4500
cmp ax, 0x100
je 0x638c1190
fld st(0)
fstp xword [esp + 0x20]
movzx edx, word [esp + 0x28]
test dx, dx
js 0x638c1070
fxam
wait
fnstsw ax
fstp st(0)
and ax, 0x4500
cmp ax, 0x500
je 0x638c1350
and dx, 0x7fff
mov esi, dword [esp + 0x38]
mov edi, dword [esp + 0x3c]
mov word [esp + 8], dx
jne 0x638c1080
mov edx, edi
or edx, esi
jne 0x638c1200
mov ebp, dword [ebx + 0xc]
cmp ebp, 0xe
jbe 0x638c10a8
mov eax, dword [ebx + 4]
mov dword [esp + 0xc], eax
lea eax, [esp + 0x48]
mov dword [esp + 4], eax
mov edx, dword [ebx + 0xc]
test edx, edx
jle 0x638c13e8
mov byte [esp + 0x48], 0x2e
lea eax, [esp + 0x49]
mov byte [eax], 0x30
lea ebp, [eax + 1]
mov eax, dword [ebx + 8]
mov dword [esp + 0x14], eax
test eax, eax
jle 0x638c1311
mov edx, dword [ebx + 0xc]
mov eax, ebp
sub eax, dword [esp + 4]
movsx esi, word [esp + 8]
lea ecx, [eax + edx]
test edx, edx
cmovg eax, ecx
xor edx, edx
mov ecx, 0x66666667
mov dword [esp + 0x10], esi
test dword [esp + 0xc], 0x1c0
setne dl
lea edi, [eax + edx + 5]
mov eax, esi
imul ecx
mov eax, esi
mov dword [esp + 8], edi
sar eax, 0x1f
mov ecx, edx
sar ecx, 2
sub ecx, eax
je 0x638c1400
lea esi, [esi]
mov eax, 0x66666667
add edi, 1
imul ecx
sar ecx, 0x1f
lea esi, [edi + 2]
sub si, word [esp + 8]
sar edx, 2
sub edx, ecx
mov ecx, edx
jne 0x638c0f68
movsx esi, si
mov eax, dword [esp + 0x14]
cmp eax, edi
jle 0x638c1340
sub eax, edi
test dword [esp + 0xc], 0x600
je 0x638c13a0
mov dword [ebx + 8], eax
test byte [esp + 0xc], 0x80
jne 0x638c132a
test dword [esp + 0xc], 0x100
jne 0x638c1370
test byte [esp + 0xc], 0x40
jne 0x638c1388
mov edx, ebx
mov eax, 0x30
call fcn.638bf9c0
mov eax, dword [ebx + 4]
mov edx, ebx
and eax, 0x20
or eax, 0x58
call fcn.638bf9c0
mov eax, dword [ebx + 8]
test eax, eax
jle 0x638c1019
test byte [ebx + 5], 2
je 0x638c1019
sub eax, 1
mov dword [ebx + 8], eax
lea esi, [esi]
nop
mov edx, ebx
mov eax, 0x30
call fcn.638bf9c0
mov eax, dword [ebx + 8]
lea edx, [eax - 1]
mov dword [ebx + 8], edx
test eax, eax
jg 0x638c1000
mov edi, dword [esp + 4]
cmp ebp, dword [esp + 4]
ja 0x638c104a
jmp 0x638c11bc
movzx eax, word [ebx + 0x1c]
mov word [esp + 0x36], ax
test ax, ax
jne 0x638c12e0
cmp ebp, edi
je 0x638c11bc
movsx eax, byte [ebp - 1]
sub ebp, 1
cmp eax, 0x2e
je 0x638c1250
cmp eax, 0x2c
je 0x638c1030
mov edx, ebx
call fcn.638bf9c0
jmp 0x638c1042
or dword [ebx + 4], 0x80
jmp 0x638c0e9d
mov ebp, dword [ebx + 0xc]
sub word [esp + 8], 0x3fff
cmp ebp, 0xe
jbe 0x638c10ae
mov eax, dword [ebx + 4]
mov edx, edi
or edx, esi
mov dword [esp + 0xc], eax
jne 0x638c110a
jmp 0x638c0ee7
shld edi, esi, 1
add esi, esi
test edi, edi
jns 0x638c10a8
mov ecx, 0xe
mov eax, 4
xor edx, edx
sub ecx, ebp
shl ecx, 2
shld edx, eax, cl
shl eax, cl
test cl, 0x20
je 0x638c10d1
mov edx, eax
xor eax, eax
shrd esi, edi, 1
shr edi, 1
add esi, eax
adc edi, edx
test edi, edi
js 0x638c1240
shld edi, esi, 1
add esi, esi
mov ecx, 0xf
mov eax, dword [ebx + 4]
sub ecx, ebp
xor ebp, ebp
shl ecx, 2
mov dword [esp + 0xc], eax
shrd esi, edi, cl
shr edi, cl
test cl, 0x20
cmovne esi, edi
cmovne edi, ebp
lea eax, [esp + 0x48]
mov dword [esp + 4], eax
mov ebp, eax
mov eax, dword [esp + 0xc]
mov ecx, eax
and eax, 0x20
and ecx, 0x800
mov byte [esp + 0x10], al
mov dword [esp + 0x1c], ecx
jmp 0x638c1152
xor edx, edx
cmp ebp, dword [esp + 4]
ja 0x638c113f
mov ecx, dword [ebx + 0xc]
test ecx, ecx
js 0x638c1148
lea eax, [edx + 0x30]
mov byte [ebp], al
add ebp, 1
mov edx, edi
or edx, esi
je 0x638c12f8
mov edx, esi
mov eax, esi
mov ecx, edi
and edx, 0xfffffff0
and eax, 0xf
or ecx, edx
je 0x638c1260
mov edx, dword [ebx + 0xc]
shrd esi, edi, 4
shr edi, 4
test edx, edx
jle 0x638c117a
sub edx, 1
mov dword [ebx + 0xc], edx
test eax, eax
je 0x638c1130
mov edx, eax
cmp eax, 9
jbe 0x638c113f
add eax, 0x37
or al, byte [esp + 0x10]
jmp 0x638c1142
fstp st(0)
mov ecx, ebx
mov edx, 0x63a64387
xor eax, eax
call fcn.638bfc70
add esp, 0x6c
pop ebx
pop esi
pop edi
pop ebp
ret
mov edx, ebx
mov eax, 0x30
call fcn.638bf9c0
mov eax, dword [ebx + 0xc]
lea edx, [eax - 1]
mov dword [ebx + 0xc], edx
test eax, eax
jg 0x638c11b0
mov eax, dword [ebx + 4]
mov edx, ebx
and eax, 0x20
or eax, 0x50
call fcn.638bf9c0
add dword [ebx + 8], esi
mov eax, dword [esp + 0x10]
mov ecx, ebx
or dword [ebx + 4], 0x1c0
cdq
call fcn.638c02a0
add esp, 0x6c
pop ebx
pop esi
pop edi
pop ebp
ret
test edi, edi
js 0x638c1410
mov eax, 0xffffc001
lea esi, [esi]
shld edi, esi, 1
mov edx, eax
add esi, esi
sub eax, 1
test edi, edi
jns 0x638c1210
mov word [esp + 8], dx
mov ebp, dword [ebx + 0xc]
cmp ebp, 0xe
jbe 0x638c10b2
mov eax, dword [ebx + 4]
mov dword [esp + 0xc], eax
jmp 0x638c110a
add word [esp + 8], 1
jmp 0x638c10e9
mov eax, ebx
call fcn.638bfd10
jmp 0x638c1042
cmp ebp, dword [esp + 4]
ja 0x638c1278
mov ecx, dword [esp + 0x1c]
test ecx, ecx
jne 0x638c1278
mov edx, dword [ebx + 0xc]
test edx, edx
jle 0x638c127f
lea esi, [esi]
mov byte [ebp], 0x2e
add ebp, 1
movzx edx, word [esp + 8]
mov ecx, esi
xor ecx, 1
sub edx, 1
mov dword [esp + 0x14], ecx
mov word [esp + 0x1a], dx
mov edx, dword [esp + 0x14]
or edx, edi
je 0x638c13d8
mov dword [esp + 8], eax
movzx edx, word [esp + 0x1a]
mov dword [esp + 0x14], ebx
nop
shrd esi, edi, 1
shr edi, 1
mov ebx, edx
mov ecx, esi
mov eax, edi
lea edx, [ebx - 1]
xor ecx, 1
or eax, ecx
jne 0x638c12b0
mov eax, dword [esp + 8]
xor esi, esi
mov word [esp + 8], bx
xor edi, edi
mov ebx, dword [esp + 0x14]
jmp 0x638c117a
mov ecx, ebx
mov edx, 1
lea eax, [esp + 0x36]
call fcn.638bfa20
jmp 0x638c1042
cmp ebp, dword [esp + 4]
je 0x638c0eef
mov eax, dword [ebx + 8]
mov dword [esp + 0x14], eax
test eax, eax
jg 0x638c0f18
movsx eax, word [esp + 8]
mov esi, 2
mov dword [esp + 0x10], eax
test byte [esp + 0xc], 0x80
je 0x638c0fb3
mov edx, ebx
mov eax, 0x2d
call fcn.638bf9c0
jmp 0x638c0fcc
mov dword [ebx + 8], 0xffffffff
jmp 0x638c0fa8
mov eax, edx
mov ecx, ebx
mov edx, 0x63a6438b
and eax, 0x8000
call fcn.638bfc70
add esp, 0x6c
pop ebx
pop esi
pop edi
pop ebp
ret
mov edx, ebx
mov eax, 0x2b
call fcn.638bf9c0
jmp 0x638c0fcc
mov edx, ebx
mov eax, 0x20
call fcn.638bf9c0
jmp 0x638c0fcc
lea edx, [eax - 1]
mov dword [ebx + 8], edx
test eax, eax
jle 0x638c0fa8
nop
mov edx, ebx
mov eax, 0x20
call fcn.638bf9c0
mov eax, dword [ebx + 8]
lea edx, [eax - 1]
mov dword [ebx + 8], edx
test eax, eax
jg 0x638c13b0
mov eax, dword [ebx + 4]
mov dword [esp + 0xc], eax
jmp 0x638c0fa8
xor esi, esi
xor edi, edi
jmp 0x638c117a
mov eax, dword [esp + 4]
test dword [esp + 0xc], 0x800
je 0x638c0f03
jmp 0x638c0efa
mov edi, dword [esp + 8]
mov esi, 2
jmp 0x638c0f89
mov eax, 0xffffc002
mov word [esp + 8], ax
jmp 0x638c1224