user: 请将这段汇编代码片段转换成等效的C代码：

```asm
<lcsq>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %r15
  push   %r14
  push   %r13
  mov    %rdi,%r13
  push   %r12
  push   %rbx
  mov    %rsi,%rbx
  sub    $0x38,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,-0x38(%rbp)
  xor    %eax,%eax
  call   <strlen@plt>
  mov    %rbx,%rdi
  lea    0x1(%rax),%edx
  mov    %rax,%r14
  mov    %edx,-0x48(%rbp)
  call   <strlen@plt>
  mov    -0x48(%rbp),%edx
  mov    %rax,%r15
  lea    0x1(%rax),%ecx
  mov    %rsp,%rax
  cmp    %rax,%rsp
  je     L176
L198:
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  cmp    %rax,%rsp
  jne    L198
L176:
  sub    $0x400,%rsp
  orq    $0x0,0x3f8(%rsp)
  mov    $0x4,%esi
  mov    %edx,%edi
  mov    %edx,-0x4c(%rbp)
  imul   %ecx,%edi
  mov    %ecx,-0x50(%rbp)
  mov    %rsp,-0x48(%rbp)
  movslq %edi,%rdi
  call   <calloc@plt>
  movslq -0x4c(%rbp),%rdi
  mov    %rax,-0x58(%rbp)
  shl    $0x3,%rdi
  call   <malloc@plt>
  mov    -0x4c(%rbp),%edx
  mov    -0x58(%rbp),%r9
  mov    -0x50(%rbp),%ecx
  mov    %rax,%r12
  test   %edx,%edx
  jle    L264
  cmp    $0x5,%r14d
  jbe    L128
  pxor   %xmm4,%xmm4
  movd   %ecx,%xmm7
  movq   %r9,%xmm6
  mov    %edx,%esi
  movdqa %xmm4,%xmm5
  shr    $0x2,%esi
  pshufd $0x0,%xmm7,%xmm7
  punpcklqdq %xmm6,%xmm6
  movdqa D12(%rip),%xmm2
  sub    $0x1,%esi
  movdqa %xmm7,%xmm8
  movdqa D2(%rip),%xmm3
  shl    $0x5,%rsi
  psrlq  $0x20,%xmm8
  pcmpgtd %xmm2,%xmm5
  lea    0x20(%rax,%rsi,1),%rsi
  nopl   0x0(%rax)
L24:
  movdqa %xmm3,%xmm1
  movdqa %xmm7,%xmm0
  movdqa %xmm4,%xmm9
  add    $0x20,%rax
  pmuludq %xmm1,%xmm0
  psrlq  $0x20,%xmm1
  movdqa %xmm5,%xmm10
  pmuludq %xmm8,%xmm1
  paddd  %xmm2,%xmm3
  pshufd $0x8,%xmm0,%xmm0
  pshufd $0x8,%xmm1,%xmm1
  punpckldq %xmm1,%xmm0
  movdqa %xmm0,%xmm1
  punpckldq %xmm0,%xmm1
  punpckhdq %xmm0,%xmm0
  pcmpgtd %xmm1,%xmm9
  pmuludq %xmm1,%xmm10
  pmuludq %xmm2,%xmm1
  pmuludq %xmm2,%xmm9
  paddq  %xmm10,%xmm9
  psllq  $0x20,%xmm9
  paddq  %xmm9,%xmm1
  movdqa %xmm5,%xmm9
  paddq  %xmm6,%xmm1
  pmuludq %xmm0,%xmm9
  movups %xmm1,-0x20(%rax)
  movdqa %xmm4,%xmm1
  pcmpgtd %xmm0,%xmm1
  pmuludq %xmm2,%xmm0
  pmuludq %xmm2,%xmm1
  paddq  %xmm9,%xmm1
  psllq  $0x20,%xmm1
  paddq  %xmm1,%xmm0
  paddq  %xmm6,%xmm0
  movups %xmm0,-0x10(%rax)
  cmp    %rax,%rsi
  jne    L24
  mov    %edx,%edi
  and    $0xfffffffc,%edi
  test   $0x3,%dl
  je     L264
L147:
  mov    %ecx,%eax
  movslq %edi,%r8
  imul   %edi,%eax
  lea    0x0(,%r8,8),%rsi
  movslq %eax,%r10
  lea    (%r9,%r10,4),%r10
  mov    %r10,(%r12,%r8,8)
  lea    0x1(%rdi),%r8d
  cmp    %r8d,%edx
  jle    L264
  add    %ecx,%eax
  movslq %eax,%r8
  lea    (%r9,%r8,4),%r8
  mov    %r8,0x8(%r12,%rsi,1)
  lea    0x2(%rdi),%r8d
  cmp    %r8d,%edx
  jle    L264
  add    %ecx,%eax
  movslq %eax,%r8
  lea    (%r9,%r8,4),%r8
  mov    %r8,0x10(%r12,%rsi,1)
  lea    0x3(%rdi),%r8d
  cmp    %r8d,%edx
  jle    L264
  add    %ecx,%eax
  movslq %eax,%r8
  lea    (%r9,%r8,4),%r8
  mov    %r8,0x18(%r12,%rsi,1)
  lea    0x4(%rdi),%r8d
  cmp    %edx,%r8d
  jge    L264
  lea    (%rax,%rcx,1),%r8d
  movslq %r8d,%rax
  lea    (%r9,%rax,4),%rax
  mov    %rax,0x20(%r12,%rsi,1)
  lea    0x5(%rdi),%eax
  cmp    %eax,%edx
  jle    L264
  lea    (%r8,%rcx,1),%eax
  cltq
  lea    (%r9,%rax,4),%rax
  mov    %rax,0x28(%r12,%rsi,1)
L264:
  movzbl 0x0(%r13),%edi
  test   %dil,%dil
  je     L21
  movzbl (%rbx),%r11d
  mov    $0x1,%r10d
  test   %r11b,%r11b
  je     L21
  nopl   0x0(%rax)
L124:
  mov    -0x8(%r12,%r10,8),%r8
  mov    (%r12,%r10,8),%rsi
  mov    %r11d,%edx
  mov    $0x1,%eax
  jmp    L263
  nopl   0x0(%rax,%rax,1)
L127:
  mov    (%r8,%rax,4),%edx
  mov    -0x4(%rsi,%rax,4),%ecx
  cmp    %ecx,%edx
  cmovl  %ecx,%edx
  mov    %edx,(%rsi,%rax,4)
  add    $0x1,%rax
  movzbl -0x1(%rbx,%rax,1),%edx
  test   %dl,%dl
  je     L154
L263:
  cmp    %dil,%dl
  jne    L127
  mov    -0x4(%r8,%rax,4),%ecx
  lea    0x1(%rcx),%edx
  mov    %edx,(%rsi,%rax,4)
  add    $0x1,%rax
  movzbl -0x1(%rbx,%rax,1),%edx
  test   %dl,%dl
  jne    L263
L154:
  add    $0x1,%r10
  movzbl -0x1(%r13,%r10,1),%edi
  test   %dil,%dil
  jne    L124
L21:
  mov    -0x48(%rbp),%rax
  mov    %r14d,%edx
  mov    %r15d,%esi
  movb   $0x0,0x3ff(%rax)
  lea    0x3ff(%rax),%rbx
  test   %r15d,%r15d
  jle    L207
  test   %r14d,%r14d
  jg     L89
  jmp    L207
  nopl   (%rax)
L261:
  sub    $0x1,%esi
  cmp    -0x4(%rdi,%r11,1),%r8d
  je     L104
  movzbl -0x1(%r13,%rcx,1),%eax
  sub    $0x1,%edx
  sub    $0x1,%rbx
  mov    %al,(%rbx)
L104:
  test   %edx,%edx
  jle    L207
L75:
  test   %esi,%esi
  jle    L207
L89:
  movslq %edx,%rcx
  movslq %esi,%rax
  mov    (%r12,%rcx,8),%rdi
  mov    -0x8(%r12,%rcx,8),%r10
  lea    0x0(,%rax,4),%r11
  mov    (%rdi,%rax,4),%r8d
  cmp    (%r10,%rax,4),%r8d
  jne    L261
  sub    $0x1,%edx
  test   %edx,%edx
  jg     L75
  nopl   0x0(%rax)
L207:
  mov    %r9,%rdi
  call   <free@plt>
  mov    %r12,%rdi
  call   <free@plt>
  mov    %rbx,%rdi
  call   <strdup@plt>
  mov    -0x38(%rbp),%rdx
  sub    %fs:0x28,%rdx
  jne    L246
  lea    -0x28(%rbp),%rsp
  pop    %rbx
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  pop    %rbp
  ret
L128:
  xor    %edi,%edi
  jmp    L147
L246:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: extract_symbolic_data
arguments: tag: D12
data_type: byte[16]
name: extract_symbolic_data
arguments: tag: D2
data_type: byte[16]

tool: {"D12": [0x04,0x00,0x00,0x00,0x04,0x00,0x00,0x00,0x04,0x00,0x00,0x00,0x04,0x00,0x00,0x00]}

tool: {"D2": [0x00,0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x02,0x00,0x00,0x00,0x03,0x00,0x00,0x00]}

assistant: ```c
char *lcsq(const char *a, const char *b) {
  int lena = strlen(a) + 1;
  int lenb = strlen(b) + 1;
  int bufrlen = 1024;
  char bufr[bufrlen], *result;
  int i, j;
  const char *x, *y;
  int *la = calloc(lena * lenb, sizeof(int));
  int **lengths = malloc(lena * sizeof(int *));
  for (i = 0; i < lena; i++)
    lengths[i] = la + i * lenb;
  for (i = 0, x = a; *x; i++, x++) {
    for (j = 0, y = b; *y; j++, y++) {
      if (*x == *y) {
        lengths[i + 1][j + 1] = lengths[i][j] + 1;
      } else {
        int ml = (((lengths[i + 1][j]) > (lengths[i][j + 1])) ? (lengths[i + 1][j]) : (lengths[i][j + 1]));
        lengths[i + 1][j + 1] = ml;
      }
    }
  }
  result = bufr + bufrlen;
  *--result = '\0';
  i = lena - 1;
  j = lenb - 1;
  while ((i > 0) && (j > 0)) {
    if (lengths[i][j] == lengths[i - 1][j])
      i -= 1;
    else if (lengths[i][j] == lengths[i][j - 1])
      j -= 1;
    else {
      *--result = a[i - 1];
      i -= 1;
      j -= 1;
    }
  }
  free(la);
  free(lengths);
  return strdup(result);
}
```