user: Demonstrate the C code that generates the assembly output below:

```asm
<MD5_Update>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %r12
  push   %rbx
  sub    $0x40,%rsp
  mov    %rdi,-0x38(%rbp)
  mov    %rsi,-0x40(%rbp)
  mov    %rdx,-0x48(%rbp)
  mov    -0x40(%rbp),%rax
  mov    %rax,-0x18(%rbp)
  cmpq   $0x0,-0x48(%rbp)
  jne    L266
  mov    $0x1,%eax
  jmp    L434
L266:
  mov    -0x38(%rbp),%rax
  mov    (%rax),%rdx
  mov    -0x48(%rbp),%rax
  shl    $0x3,%rax
  add    %rdx,%rax
  mov    %eax,%ebx
  mov    -0x38(%rbp),%rax
  mov    (%rax),%rax
  cmp    %rax,%rbx
  jae    L88
  mov    -0x38(%rbp),%rax
  mov    0x18(%rax),%rax
  lea    0x1(%rax),%rdx
  mov    -0x38(%rbp),%rax
  mov    %rdx,0x18(%rax)
L88:
  mov    -0x38(%rbp),%rax
  mov    0x18(%rax),%rax
  mov    %rax,%rdx
  mov    -0x48(%rbp),%rax
  shr    $0x1d,%rax
  add    %rdx,%rax
  mov    %rax,%rdx
  mov    -0x38(%rbp),%rax
  mov    %rdx,0x18(%rax)
  mov    -0x38(%rbp),%rax
  mov    %rbx,(%rax)
  mov    -0x38(%rbp),%rax
  mov    0x8(%rax),%eax
  test   %eax,%eax
  je     L472
  mov    -0x38(%rbp),%rax
  mov    0x10(%rax),%r12
  mov    -0x38(%rbp),%rax
  mov    0x8(%rax),%eax
  sar    $0x2,%eax
  mov    %eax,-0x28(%rbp)
  mov    -0x38(%rbp),%rax
  mov    0x8(%rax),%eax
  and    $0x3,%eax
  mov    %eax,-0x20(%rbp)
  mov    -0x38(%rbp),%rax
  mov    0x8(%rax),%eax
  movslq %eax,%rdx
  mov    -0x48(%rbp),%rax
  add    %rax,%rdx
  mov    D45(%rip),%rax
  mov    (%rax),%rax
  cmp    %rax,%rdx
  jb     L308
  mov    -0x28(%rbp),%eax
  cltq
  shl    $0x3,%rax
  add    %r12,%rax
  mov    (%rax),%rbx
  cmpl   $0x3,-0x20(%rbp)
  je     L118
  cmpl   $0x3,-0x20(%rbp)
  jg     L365
  cmpl   $0x2,-0x20(%rbp)
  je     L401
  cmpl   $0x2,-0x20(%rbp)
  jg     L365
  cmpl   $0x0,-0x20(%rbp)
  je     L54
  cmpl   $0x1,-0x20(%rbp)
  je     L259
  jmp    L365
L54:
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%ebx
L259:
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%eax
  shl    $0x8,%rax
  or     %rax,%rbx
L401:
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%eax
  shl    $0x10,%rax
  or     %rax,%rbx
L118:
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%eax
  shl    $0x18,%rax
  or     %rax,%rbx
L365:
  mov    -0x28(%rbp),%eax
  lea    0x1(%rax),%edx
  mov    %edx,-0x28(%rbp)
  cltq
  shl    $0x3,%rax
  add    %r12,%rax
  mov    %rbx,(%rax)
  jmp    L45
L117:
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%ebx
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%eax
  shl    $0x8,%rax
  or     %rax,%rbx
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%eax
  shl    $0x10,%rax
  or     %rax,%rbx
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%eax
  shl    $0x18,%rax
  or     %rax,%rbx
  mov    -0x28(%rbp),%eax
  cltq
  shl    $0x3,%rax
  add    %r12,%rax
  mov    %rbx,(%rax)
  addl   $0x1,-0x28(%rbp)
L45:
  mov    D49(%rip),%rax
  mov    (%rax),%eax
  cmp    %eax,-0x28(%rbp)
  jl     L117
  mov    -0x38(%rbp),%rax
  mov    $0x1,%edx
  mov    %r12,%rsi
  mov    %rax,%rdi
  call   <md5_block_host_order@plt>
  mov    -0x38(%rbp),%rax
  mov    0x8(%rax),%eax
  movslq %eax,%rdx
  mov    D45(%rip),%rax
  mov    (%rax),%rcx
  mov    %rdx,%rax
  sub    %rcx,%rax
  add    %rax,-0x48(%rbp)
  mov    -0x38(%rbp),%rax
  movl   $0x0,0x8(%rax)
  jmp    L472
L308:
  mov    -0x38(%rbp),%rax
  mov    0x8(%rax),%eax
  mov    %eax,%edx
  mov    -0x48(%rbp),%rax
  add    %edx,%eax
  mov    %eax,%edx
  mov    -0x38(%rbp),%rax
  mov    %edx,0x8(%rax)
  mov    -0x20(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  cmp    $0x3,%rax
  ja     L446
  mov    -0x28(%rbp),%eax
  cltq
  shl    $0x3,%rax
  add    %r12,%rax
  mov    (%rax),%rbx
  cmpl   $0x2,-0x20(%rbp)
  je     L338
  cmpl   $0x2,-0x20(%rbp)
  jg     L371
  cmpl   $0x0,-0x20(%rbp)
  je     L202
  cmpl   $0x1,-0x20(%rbp)
  je     L161
  jmp    L371
L202:
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%ebx
  subq   $0x1,-0x48(%rbp)
  cmpq   $0x0,-0x48(%rbp)
  je     L50
L161:
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%eax
  shl    $0x8,%rax
  or     %rax,%rbx
  subq   $0x1,-0x48(%rbp)
  cmpq   $0x0,-0x48(%rbp)
  je     L376
L338:
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%eax
  shl    $0x10,%rax
  or     %rax,%rbx
  jmp    L371
L50:
  nop
  jmp    L371
L376:
  nop
L371:
  mov    -0x28(%rbp),%eax
  cltq
  shl    $0x3,%rax
  add    %r12,%rax
  mov    %rbx,(%rax)
  jmp    L192
L446:
  mov    -0x38(%rbp),%rax
  mov    0x8(%rax),%eax
  sar    $0x2,%eax
  mov    %eax,-0x24(%rbp)
  mov    -0x38(%rbp),%rax
  mov    0x8(%rax),%eax
  and    $0x3,%eax
  mov    %eax,-0x1c(%rbp)
  cmpl   $0x0,-0x20(%rbp)
  je     L170
  mov    -0x28(%rbp),%eax
  cltq
  shl    $0x3,%rax
  add    %r12,%rax
  mov    (%rax),%rbx
L170:
  cmpl   $0x3,-0x20(%rbp)
  je     L218
  cmpl   $0x3,-0x20(%rbp)
  jg     L132
  cmpl   $0x2,-0x20(%rbp)
  je     L364
  cmpl   $0x2,-0x20(%rbp)
  jg     L132
  cmpl   $0x0,-0x20(%rbp)
  je     L419
  cmpl   $0x1,-0x20(%rbp)
  je     L509
  jmp    L132
L419:
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%ebx
L509:
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%eax
  shl    $0x8,%rax
  or     %rax,%rbx
L364:
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%eax
  shl    $0x10,%rax
  or     %rax,%rbx
L218:
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%eax
  shl    $0x18,%rax
  or     %rax,%rbx
L132:
  mov    -0x28(%rbp),%eax
  lea    0x1(%rax),%edx
  mov    %edx,-0x28(%rbp)
  cltq
  shl    $0x3,%rax
  add    %r12,%rax
  mov    %rbx,(%rax)
  jmp    L506
L41:
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%ebx
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%eax
  shl    $0x8,%rax
  or     %rax,%rbx
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%eax
  shl    $0x10,%rax
  or     %rax,%rbx
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%eax
  shl    $0x18,%rax
  or     %rax,%rbx
  mov    -0x28(%rbp),%eax
  cltq
  shl    $0x3,%rax
  add    %r12,%rax
  mov    %rbx,(%rax)
  addl   $0x1,-0x28(%rbp)
L506:
  mov    -0x28(%rbp),%eax
  cmp    -0x24(%rbp),%eax
  jl     L41
  cmpl   $0x0,-0x1c(%rbp)
  je     L192
  mov    $0x0,%ebx
  mov    -0x1c(%rbp),%eax
  cltq
  add    %rax,-0x18(%rbp)
  cmpl   $0x3,-0x1c(%rbp)
  je     L273
  cmpl   $0x3,-0x1c(%rbp)
  jg     L309
  cmpl   $0x1,-0x1c(%rbp)
  je     L444
  cmpl   $0x2,-0x1c(%rbp)
  je     L519
  jmp    L309
L273:
  subq   $0x1,-0x18(%rbp)
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  movzbl %al,%eax
  shl    $0x10,%rax
  mov    %rax,%rbx
L519:
  subq   $0x1,-0x18(%rbp)
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  movzbl %al,%eax
  shl    $0x8,%rax
  or     %rax,%rbx
L444:
  subq   $0x1,-0x18(%rbp)
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  movzbl %al,%eax
  or     %rax,%rbx
L309:
  mov    -0x28(%rbp),%eax
  cltq
  shl    $0x3,%rax
  add    %r12,%rax
  mov    %rbx,(%rax)
L192:
  mov    $0x1,%eax
  jmp    L434
L472:
  mov    D45(%rip),%rax
  mov    (%rax),%rsi
  mov    -0x48(%rbp),%rax
  mov    $0x0,%edx
  div    %rsi
  mov    %eax,-0x28(%rbp)
  cmpl   $0x0,-0x28(%rbp)
  jle    L294
  mov    -0x28(%rbp),%edx
  mov    -0x18(%rbp),%rcx
  mov    -0x38(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <md5_block_data_order@plt>
  mov    -0x28(%rbp),%eax
  cltq
  mov    %eax,%edx
  mov    D45(%rip),%rax
  mov    (%rax),%rax
  imul   %edx,%eax
  mov    %eax,-0x28(%rbp)
  mov    -0x28(%rbp),%eax
  cltq
  add    %rax,-0x18(%rbp)
  mov    -0x28(%rbp),%eax
  cltq
  sub    %rax,-0x48(%rbp)
L294:
  cmpq   $0x0,-0x48(%rbp)
  je     L47
  mov    -0x38(%rbp),%rax
  mov    0x10(%rax),%r12
  mov    -0x48(%rbp),%rax
  mov    %eax,%edx
  mov    -0x38(%rbp),%rax
  mov    %edx,0x8(%rax)
  mov    -0x48(%rbp),%rax
  shr    $0x2,%rax
  mov    %eax,-0x24(%rbp)
  mov    -0x48(%rbp),%rax
  and    $0x3,%eax
  mov    %eax,-0x1c(%rbp)
  jmp    L281
L9:
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%ebx
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%eax
  shl    $0x8,%rax
  or     %rax,%rbx
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%eax
  shl    $0x10,%rax
  or     %rax,%rbx
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%eax
  shl    $0x18,%rax
  or     %rax,%rbx
  mov    %rbx,(%r12)
  subl   $0x1,-0x24(%rbp)
  add    $0x8,%r12
L281:
  cmpl   $0x0,-0x24(%rbp)
  jne    L9
  mov    $0x0,%ebx
  mov    -0x1c(%rbp),%eax
  cltq
  add    %rax,-0x18(%rbp)
  cmpl   $0x3,-0x1c(%rbp)
  je     L231
  cmpl   $0x3,-0x1c(%rbp)
  jg     L199
  cmpl   $0x1,-0x1c(%rbp)
  je     L112
  cmpl   $0x2,-0x1c(%rbp)
  je     L350
  jmp    L199
L231:
  subq   $0x1,-0x18(%rbp)
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  movzbl %al,%eax
  shl    $0x10,%rax
  mov    %rax,%rbx
L350:
  subq   $0x1,-0x18(%rbp)
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  movzbl %al,%eax
  shl    $0x8,%rax
  or     %rax,%rbx
L112:
  subq   $0x1,-0x18(%rbp)
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  movzbl %al,%eax
  or     %rax,%rbx
L199:
  mov    %rbx,(%r12)
L47:
  mov    $0x1,%eax
L434:
  add    $0x40,%rsp
  pop    %rbx
  pop    %r12
  pop    %rbp
  ret
```

assistant: ```c
int MD5_Update(MD5_CTX *c, const void *data_, unsigned long len) {
  const unsigned char *data = data_;
  register MD5_LONG *p;
  register unsigned long l;
  int sw, sc, ew, ec;
  if (len == 0)
    return 1;
  l = (c->Nl + (len << 3)) & 0xffffffffL;
  if (l < c->Nl)
    c->Nh++;
  c->Nh += (len >> 29);
  c->Nl = l;
  if (c->num != 0) {
    p = c->data;
    sw = c->num >> 2;
    sc = c->num & 0x03;
    if ((c->num + len) >= MD5_CBLOCK) {
      l = p[sw];
      {
        switch (sc) {
        case 0:
          l = ((unsigned long)(*((data)++)));
        case 1:
          l |= ((unsigned long)(*((data)++))) << 8;
        case 2:
          l |= ((unsigned long)(*((data)++))) << 16;
        case 3:
          l |= ((unsigned long)(*((data)++))) << 24;
        }
      };
      p[sw++] = l;
      for (; sw < MD5_LBLOCK; sw++) {
        (l = (((unsigned long)(*((data)++)))), l |= (((unsigned long)(*((data)++))) << 8), l |= (((unsigned long)(*((data)++))) << 16), l |= (((unsigned long)(*((data)++))) << 24), l);
        p[sw] = l;
      }
      md5_block_host_order(c, p, 1);
      len -= (MD5_CBLOCK - c->num);
      c->num = 0;
    } else {
      c->num += len;
      if ((sc + len) < 4) {
        l = p[sw];
        {
          switch (sc) {
          case 0:
            l = ((unsigned long)(*((data)++)));
            if (--len == 0)
              break;
          case 1:
            l |= ((unsigned long)(*((data)++))) << 8;
            if (--len == 0)
              break;
          case 2:
            l |= ((unsigned long)(*((data)++))) << 16;
          }
        };
        p[sw] = l;
      } else {
        ew = (c->num >> 2);
        ec = (c->num & 0x03);
        if (sc)
          l = p[sw];
        {
          switch (sc) {
          case 0:
            l = ((unsigned long)(*((data)++)));
          case 1:
            l |= ((unsigned long)(*((data)++))) << 8;
          case 2:
            l |= ((unsigned long)(*((data)++))) << 16;
          case 3:
            l |= ((unsigned long)(*((data)++))) << 24;
          }
        };
        p[sw++] = l;
        for (; sw < ew; sw++) {
          (l = (((unsigned long)(*((data)++)))), l |= (((unsigned long)(*((data)++))) << 8), l |= (((unsigned long)(*((data)++))) << 16), l |= (((unsigned long)(*((data)++))) << 24), l);
          p[sw] = l;
        }
        if (ec) {
          {
            l = 0;
            (data) += ec;
            switch (ec) {
            case 3:
              l = ((unsigned long)(*(--(data)))) << 16;
            case 2:
              l |= ((unsigned long)(*(--(data)))) << 8;
            case 1:
              l |= ((unsigned long)(*(--(data))));
            }
          };
          p[sw] = l;
        }
      }
      return 1;
    }
  }
  sw = len / MD5_CBLOCK;
  if (sw > 0) {
    {
      md5_block_data_order(c, data, sw);
      sw *= MD5_CBLOCK;
      data += sw;
      len -= sw;
    }
  }
  if (len != 0) {
    p = c->data;
    c->num = len;
    ew = len >> 2;
    ec = len & 0x03;
    for (; ew; ew--, p++) {
      (l = (((unsigned long)(*((data)++)))), l |= (((unsigned long)(*((data)++))) << 8), l |= (((unsigned long)(*((data)++))) << 16), l |= (((unsigned long)(*((data)++))) << 24), l);
      *p = l;
    }
    {
      l = 0;
      (data) += ec;
      switch (ec) {
      case 3:
        l = ((unsigned long)(*(--(data)))) << 16;
      case 2:
        l |= ((unsigned long)(*(--(data)))) << 8;
      case 1:
        l |= ((unsigned long)(*(--(data))));
      }
    };
    *p = l;
  }
  return 1;
}
```