user: Translate the below assembly code into C programming language:

```asm
<chksum>:
  endbr64
  push   %r15
  mov    %rdi,%rdx
  lea    -0x4(%rsi),%edi
  mov    %esi,%ecx
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  cmp    $0x8,%edi
  jle    L125
  lea    -0xd(%rsi),%eax
  lea    -0xc(%rsi),%r8d
  cmp    $0xe,%eax
  jbe    L182
  lea    0x8(%rdx),%rax
  pxor   %xmm1,%xmm1
  pxor   %xmm2,%xmm2
  mov    %r8d,%esi
  shr    $0x4,%esi
  sub    $0x1,%esi
  shl    $0x4,%rsi
  lea    0x18(%rdx,%rsi,1),%rsi
  nopl   0x0(%rax)
L153:
  movdqu (%rax),%xmm0
  add    $0x10,%rax
  movdqa %xmm0,%xmm3
  punpckhbw %xmm2,%xmm0
  punpcklbw %xmm2,%xmm3
  paddw  %xmm3,%xmm0
  paddw  %xmm0,%xmm1
  cmp    %rsi,%rax
  jne    L153
  movdqa %xmm1,%xmm0
  mov    %r8d,%r9d
  psrldq $0x8,%xmm0
  and    $0xfffffff0,%r9d
  paddw  %xmm0,%xmm1
  lea    0x8(%r9),%esi
  movdqa %xmm1,%xmm0
  psrldq $0x4,%xmm0
  paddw  %xmm0,%xmm1
  movdqa %xmm1,%xmm0
  psrldq $0x2,%xmm0
  paddw  %xmm0,%xmm1
  pextrw $0x0,%xmm1,%eax
  cmp    %r8d,%r9d
  je     L214
L238:
  movslq %esi,%r8
  movzbl (%rdx,%r8,1),%r8d
  add    %r8d,%eax
  lea    0x1(%rsi),%r8d
  cmp    %edi,%r8d
  jge    L214
  movslq %r8d,%r8
  movzbl (%rdx,%r8,1),%r8d
  add    %r8d,%eax
  lea    0x2(%rsi),%r8d
  cmp    %r8d,%edi
  jle    L214
  movslq %r8d,%r8
  movzbl (%rdx,%r8,1),%r8d
  add    %r8d,%eax
  lea    0x3(%rsi),%r8d
  cmp    %r8d,%edi
  jle    L214
  movslq %r8d,%r8
  movzbl (%rdx,%r8,1),%r8d
  add    %r8d,%eax
  lea    0x4(%rsi),%r8d
  cmp    %r8d,%edi
  jle    L214
  movslq %r8d,%r8
  movzbl (%rdx,%r8,1),%r8d
  add    %r8d,%eax
  lea    0x5(%rsi),%r8d
  cmp    %r8d,%edi
  jle    L214
  movslq %r8d,%r8
  movzbl (%rdx,%r8,1),%r8d
  add    %r8d,%eax
  lea    0x6(%rsi),%r8d
  cmp    %r8d,%edi
  jle    L214
  movslq %r8d,%r8
  movzbl (%rdx,%r8,1),%r8d
  add    %r8d,%eax
  lea    0x7(%rsi),%r8d
  cmp    %r8d,%edi
  jle    L214
  movslq %r8d,%r8
  movzbl (%rdx,%r8,1),%r8d
  add    %r8d,%eax
  lea    0x8(%rsi),%r8d
  cmp    %r8d,%edi
  jle    L214
  movslq %r8d,%r8
  movzbl (%rdx,%r8,1),%r8d
  add    %r8d,%eax
  lea    0x9(%rsi),%r8d
  cmp    %r8d,%edi
  jle    L214
  movslq %r8d,%r8
  movzbl (%rdx,%r8,1),%r8d
  add    %r8d,%eax
  lea    0xa(%rsi),%r8d
  cmp    %r8d,%edi
  jle    L214
  movslq %r8d,%r8
  movzbl (%rdx,%r8,1),%r8d
  add    %r8d,%eax
  lea    0xb(%rsi),%r8d
  cmp    %r8d,%edi
  jle    L214
  movslq %r8d,%r8
  movzbl (%rdx,%r8,1),%r8d
  add    %r8d,%eax
  lea    0xc(%rsi),%r8d
  cmp    %r8d,%edi
  jle    L214
  movslq %r8d,%r8
  movzbl (%rdx,%r8,1),%r8d
  add    %r8d,%eax
  lea    0xd(%rsi),%r8d
  cmp    %r8d,%edi
  jle    L214
  movslq %r8d,%r8
  add    $0xe,%esi
  movzbl (%rdx,%r8,1),%r8d
  add    %r8d,%eax
  cmp    %esi,%edi
  jle    L214
  movslq %esi,%rsi
  movzbl (%rdx,%rsi,1),%esi
  add    %esi,%eax
  nopl   0x0(%rax,%rax,1)
L214:
  movzbl %al,%ebp
  movzbl %al,%r11d
  shr    $0x8,%ax
  movzwl %ax,%r10d
  mov    %r10d,%r12d
L102:
  movslq %ecx,%rax
  lea    D6(%rip),%rsi
  mov    %r11d,%ecx
  mov    $0x4,%edi
  lea    -0x1(%rdx,%rax,1),%r15
  lea    -0x3(%rdx,%rax,1),%rbx
  lea    -0x2(%rdx,%rax,1),%r14
  lea    -0x4(%rdx,%rax,1),%r13
  movzbl (%r15),%eax
  mov    %r10d,%edx
  push   %rax
  movzbl (%r14),%eax
  push   %rax
  movzbl 0x0(%r13),%r9d
  movzbl (%rbx),%r8d
  call   <trace@plt>
  movzbl (%rbx),%edx
  pop    %rax
  xor    %eax,%eax
  pop    %rcx
  cmp    %r12w,%dx
  je     L31
L167:
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nop
L31:
  movzbl 0x0(%r13),%edx
  cmp    %bp,%dx
  jne    L167
  cmpb   $0xd,(%r14)
  jne    L167
  xor    %eax,%eax
  cmpb   $0xa,(%r15)
  sete   %al
  jmp    L167
  nopl   0x0(%rax,%rax,1)
L125:
  xor    %r10d,%r10d
  xor    %r12d,%r12d
  xor    %r11d,%r11d
  xor    %ebp,%ebp
  jmp    L102
L182:
  mov    $0x8,%esi
  xor    %eax,%eax
  jmp    L238
```

tool_calls: name: retrieve_data
arguments: data_tag: D6
type_infered: string

tool: D6: checksum=%02X%02X %02X%02X:%02X%02X


assistant: ```c
int chksum(const unsigned char *buff, int len) {
  unsigned short sum = 0;
  int i;
  for (i = 8; i < len - 4; i++)
    sum += buff[i];
  trace(4, "checksum=%02X%02X %02X%02X:%02X%02X\n", sum >> 8, sum & 0xFF, buff[len - 3], buff[len - 4], buff[len - 2], buff[len - 1]);
  return (sum >> 8) == buff[len - 3] && (sum & 0xFF) == buff[len - 4] && buff[len - 2] == 0x0D && buff[len - 1] == 0x0A;
}
```