user: 下面的汇编指令对应的C源代码是什么：

```asm
<convert>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbx
  sub    $0x98,%rsp
  mov    %rdi,-0x78(%rbp)
  mov    %esi,-0x7c(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x38(%rbp)
  xor    %eax,%eax
  mov    %rsp,%rax
  mov    %rax,-0xb8(%rbp)
  mov    -0x78(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  mov    %eax,%ebx
  mov    -0x7c(%rbp),%r10d
  mov    %r10d,-0x80(%rbp)
  movslq %ebx,%rax
  sub    $0x1,%rax
  mov    %rax,-0x58(%rbp)
  movslq %ebx,%rax
  mov    %rax,-0x90(%rbp)
  movq   $0x0,-0x88(%rbp)
  movslq %ebx,%rax
  mov    %rax,-0x90(%rbp)
  movslq %r10d,%rax
  sub    $0x1,%rax
  mov    %rax,-0x50(%rbp)
  movslq %ebx,%rax
  mov    %rax,-0xa0(%rbp)
  movq   $0x0,-0x98(%rbp)
  movslq %r10d,%rax
  mov    %rax,-0xb0(%rbp)
  movq   $0x0,-0xa8(%rbp)
  mov    -0xa0(%rbp),%rsi
  mov    -0x98(%rbp),%rdi
  mov    %rdi,%rdx
  mov    -0xb0(%rbp),%r8
  mov    -0xa8(%rbp),%r9
  imul   %r8,%rdx
  mov    %r9,%rax
  imul   %rsi,%rax
  lea    (%rdx,%rax,1),%rcx
  mov    %rsi,%rax
  mul    %r8
  add    %rdx,%rcx
  mov    %rcx,%rdx
  movslq %ebx,%rax
  mov    %rax,%r14
  mov    $0x0,%r15d
  movslq %r10d,%rax
  mov    %rax,%r12
  mov    $0x0,%r13d
  mov    %r15,%rdx
  imul   %r12,%rdx
  mov    %r13,%rax
  imul   %r14,%rax
  lea    (%rdx,%rax,1),%rcx
  mov    %r14,%rax
  mul    %r12
  add    %rdx,%rcx
  mov    %rcx,%rdx
  movslq %ebx,%rdx
  movslq %r10d,%rax
  imul   %rdx,%rax
  mov    $0x10,%edx
  sub    $0x1,%rdx
  add    %rdx,%rax
  mov    $0x10,%esi
  mov    $0x0,%edx
  div    %rsi
  imul   $0x10,%rax,%rax
  mov    %rax,%rcx
  and    $0xfffffffffffff000,%rcx
  mov    %rsp,%rdx
  sub    %rcx,%rdx
L117:
  cmp    %rdx,%rsp
  je     L91
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  jmp    L117
L91:
  mov    %rax,%rdx
  and    $0xfff,%edx
  sub    %rdx,%rsp
  mov    %rax,%rdx
  and    $0xfff,%edx
  test   %rdx,%rdx
  je     L88
  and    $0xfff,%eax
  sub    $0x8,%rax
  add    %rsp,%rax
  orq    $0x0,(%rax)
L88:
  mov    %rsp,%rax
  add    $0x0,%rax
  mov    %rax,-0x48(%rbp)
  movl   $0x0,-0x70(%rbp)
  movl   $0x0,-0x6c(%rbp)
  movl   $0x0,-0x68(%rbp)
  movl   $0x0,-0x5c(%rbp)
  mov    -0x78(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  add    $0x1,%eax
  mov    %eax,%edi
  call   <malloc@plt>
  mov    %rax,-0x40(%rbp)
  cmpl   $0x1,-0x7c(%rbp)
  jne    L3
  mov    -0x78(%rbp),%rax
  jmp    L103
L3:
  mov    %ebx,%edx
  mov    -0x80(%rbp),%eax
  imul   %edx,%eax
  mov    %eax,%edx
  mov    -0x48(%rbp),%rax
  mov    $0x20,%esi
  mov    %rax,%rdi
  call   <memset@plt>
  mov    -0x40(%rbp),%rax
  movb   $0x0,(%rax)
  movl   $0x0,-0x64(%rbp)
  jmp    L67
L21:
  mov    -0x64(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x78(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  mov    -0x48(%rbp),%rsi
  mov    -0x6c(%rbp),%edx
  movslq %edx,%rcx
  mov    -0x70(%rbp),%edx
  movslq %edx,%rdx
  imul   -0x90(%rbp),%rdx
  add    %rsi,%rcx
  add    %rcx,%rdx
  mov    %al,(%rdx)
  cmpl   $0x0,-0x68(%rbp)
  jne    L68
  addl   $0x1,-0x70(%rbp)
  jmp    L106
L68:
  addl   $0x1,-0x6c(%rbp)
  subl   $0x1,-0x70(%rbp)
L106:
  mov    -0x7c(%rbp),%eax
  sub    $0x1,%eax
  cmp    %eax,-0x70(%rbp)
  jne    L137
  movl   $0x1,-0x68(%rbp)
L137:
  cmpl   $0x0,-0x70(%rbp)
  jne    L147
  movl   $0x0,-0x68(%rbp)
L147:
  addl   $0x1,-0x64(%rbp)
L67:
  mov    -0x78(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  cmp    %eax,-0x64(%rbp)
  jl     L21
  movl   $0x0,-0x64(%rbp)
  jmp    L125
L162:
  movl   $0x0,-0x60(%rbp)
  jmp    L22
L95:
  mov    -0x48(%rbp),%rcx
  mov    -0x60(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x64(%rbp),%eax
  cltq
  mov    -0x90(%rbp),%rbx
  imul   %rbx,%rax
  add    %rcx,%rdx
  add    %rdx,%rax
  movzbl (%rax),%eax
  cmp    $0x20,%al
  je     L105
  mov    -0x5c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x40(%rbp),%rax
  add    %rax,%rdx
  mov    -0x48(%rbp),%rsi
  mov    -0x60(%rbp),%eax
  movslq %eax,%rcx
  mov    -0x64(%rbp),%eax
  cltq
  imul   %rbx,%rax
  add    %rsi,%rcx
  add    %rcx,%rax
  movzbl (%rax),%eax
  mov    %al,(%rdx)
  addl   $0x1,-0x5c(%rbp)
  mov    -0x5c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x40(%rbp),%rax
  add    %rdx,%rax
  movb   $0x0,(%rax)
L105:
  addl   $0x1,-0x60(%rbp)
L22:
  mov    -0x78(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  cmp    %eax,-0x60(%rbp)
  jl     L95
  addl   $0x1,-0x64(%rbp)
L125:
  mov    -0x64(%rbp),%eax
  cmp    -0x7c(%rbp),%eax
  jl     L162
  mov    -0x40(%rbp),%rax
L103:
  mov    -0xb8(%rbp),%rsp
  mov    -0x38(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L165
  call   <__stack_chk_fail@plt>
L165:
  lea    -0x28(%rbp),%rsp
  pop    %rbx
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  pop    %rbp
  ret
```

assistant: ```c
char *convert(char *s, int numRows) {
  char map[numRows][strlen(s)];
  int stx = 0;
  int sty = 0;
  int dir = 0;
  int i, j, k = 0;
  char *ans = malloc(sizeof(char) * (strlen(s) + 1));
  if (numRows == 1)
    return s;
  memset(map, ' ', sizeof(map));
  ans[0] = '\0';
  for (i = 0; i < strlen(s); i++) {
    map[stx][sty] = s[i];
    if (dir == 0) {
      stx++;
    } else {
      sty++;
      stx--;
    }
    if (stx == numRows - 1)
      dir = 1;
    if (stx == 0)
      dir = 0;
  }
  for (i = 0; i < numRows; i++) {
    for (j = 0; j < strlen(s); j++) {
      if (map[i][j] != ' ') {
        ans[k] = map[i][j];
        ans[++k] = '\0';
      }
    }
  }
  return ans;
}
```