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

```asm
<mstrcmp>:
  endbr64
  mov    %rdi,%r10
  mov    %rsi,%r11
  test   %edx,%edx
  je     L253
  cmp    $0x1,%edx
  je     L221
  xor    %eax,%eax
  cmp    $0xffffffff,%edx
  je     L323
  ret
  nop
L253:
  jmp    1050 <strcmp@plt>
  nopl   (%rax)
L323:
  push   %r12
  push   %rbp
  push   %rbx
  movzbl (%rdi),%ebx
  test   %bl,%bl
  je     L527
  lea    0x1(%rdi),%rax
  xor    %r8d,%r8d
  xchg   %ax,%ax
L269:
  lea    -0x9(%rbx),%edx
  cmp    $0x4,%dl
  jbe    L218
  cmp    $0x20,%bl
  jne    L314
L218:
  movzbl (%rax),%ebx
  add    $0x1,%rax
  add    $0x1,%r8d
  test   %bl,%bl
  jne    L269
L537:
  movzbl (%r11),%r12d
  test   %r12b,%r12b
  je     L307
  xor    %ecx,%ecx
  xor    %ebp,%ebp
  xor    %ebx,%ebx
L398:
  lea    0x1(%r11),%rax
  xor    %r9d,%r9d
  nopw   0x0(%rax,%rax,1)
L387:
  lea    -0x9(%r12),%edx
  cmp    $0x4,%dl
  jbe    L69
  cmp    $0x20,%r12b
  jne    L258
L69:
  movzbl (%rax),%r12d
  add    $0x1,%rax
  add    $0x1,%r9d
  test   %r12b,%r12b
  jne    L387
L135:
  lea    -0x9(%rcx),%eax
  cmp    $0x4,%al
  jbe    L409
  mov    %ecx,%eax
  and    $0xffffffef,%eax
  cmp    $0x20,%al
  jne    L526
L409:
  xor    %esi,%esi
  xor    %eax,%eax
  xor    %r12d,%r12d
L272:
  lea    0x1(%r8),%edx
  movslq %edx,%rdx
  nopw   0x0(%rax,%rax,1)
L484:
  movzbl (%r10,%rdx,1),%ecx
  mov    %edx,%r8d
  add    $0x1,%rdx
  lea    -0x9(%rcx),%edi
  cmp    $0x4,%dil
  jbe    L484
  mov    %ecx,%edi
  and    $0xffffffef,%edi
  cmp    $0x20,%dil
  je     L484
L249:
  lea    -0x9(%rsi),%edx
  cmp    $0x4,%dl
  jbe    L254
  mov    %esi,%edx
  and    $0xffffffef,%edx
  cmp    $0x20,%dl
  jne    L367
L254:
  lea    0x1(%r9),%edx
  movslq %edx,%rdx
  nopl   0x0(%rax)
L187:
  movsbl (%r11,%rdx,1),%esi
  mov    %edx,%r9d
  add    $0x1,%rdx
  mov    %esi,%edi
  and    $0xffffffef,%edi
  cmp    $0x20,%dil
  je     L187
  lea    -0x9(%rsi),%edi
  cmp    $0x4,%dil
  jbe    L187
L367:
  lea    -0x30(%rcx),%edx
  lea    -0x30(%rsi),%edi
  cmp    $0x9,%dl
  ja     L77
  cmp    $0x9,%dil
  ja     L77
  cmp    %ebp,%eax
  je     L434
  sub    %ebp,%eax
L115:
  pop    %rbx
  pop    %rbp
  pop    %r12
  ret
L221:
  movsbl (%rdi),%eax
  xor    %ecx,%ecx
  test   %al,%al
  je     L480
  nopl   (%rax)
L88:
  movsbl (%r11,%rcx,1),%edx
  test   %dl,%dl
  je     L517
  cmp    %al,%dl
  je     L468
  lea    -0x41(%rax),%esi
  cmp    $0x19,%sil
  ja     L478
  lea    -0x61(%rdx),%esi
  cmp    $0x19,%sil
  jbe    L70
L517:
  sub    %edx,%eax
  ret
  nopw   0x0(%rax,%rax,1)
L478:
  lea    -0x61(%rax),%esi
  cmp    $0x19,%sil
  ja     L517
  lea    -0x41(%rdx),%esi
  cmp    $0x19,%sil
  ja     L517
  lea    -0x20(%rax),%esi
  cmp    %sil,%dl
  jne    L517
L468:
  add    $0x1,%rcx
  movsbl (%r10,%rcx,1),%eax
  test   %al,%al
  jne    L88
  movsbl (%r11,%rcx,1),%edx
  xor    %eax,%eax
  jmp    L517
L70:
  lea    -0x20(%rdx),%esi
  cmp    %sil,%al
  je     L468
  sub    %edx,%eax
  ret
L307:
  xor    %ebx,%ebx
  xor    %ecx,%ecx
L526:
  lea    -0x30(%rcx),%edx
  xor    %r12d,%r12d
  mov    $0xffffffd0,%edi
L77:
  xor    %eax,%eax
  cmp    $0x9,%dl
  setbe  %al
  mov    %eax,%edx
  neg    %edx
  cmp    $0x2d,%bl
  cmove  %edx,%eax
  xor    %edx,%edx
  cmp    $0x9,%dil
  setbe  %dl
  mov    %edx,%ecx
  neg    %ecx
  cmp    $0x2d,%r12b
  cmove  %ecx,%edx
  sub    %edx,%eax
  jmp    L115
L434:
  xor    %edx,%edx
  jmp    L156
  nopl   0x0(%rax,%rax,1)
L365:
  add    $0x1,%r8d
  movslq %r8d,%rax
  movzbl (%r10,%rax,1),%ecx
L342:
  test   %cl,%cl
  je     L371
  test   %sil,%sil
  je     L334
L156:
  lea    -0x9(%rcx),%eax
  cmp    $0x4,%al
  jbe    L365
  cmp    $0x20,%cl
  je     L365
  lea    -0x9(%rsi),%eax
  cmp    $0x4,%al
  jbe    L3
  cmp    $0x20,%sil
  jne    L226
L3:
  add    $0x1,%r9d
  movslq %r9d,%rax
  movsbl (%r11,%rax,1),%esi
  jmp    L342
L226:
  lea    -0x30(%rcx),%edi
  lea    -0x30(%rsi),%eax
  cmp    $0x9,%dil
  ja     L476
  cmp    $0x9,%al
  ja     L397
  test   %edx,%edx
  jne    L194
  movsbl %cl,%edx
  sub    %esi,%edx
L194:
  add    $0x1,%r8d
  add    $0x1,%r9d
  movslq %r8d,%rax
  movzbl (%r10,%rax,1),%ecx
  movslq %r9d,%rax
  movsbl (%r11,%rax,1),%esi
  jmp    L342
L334:
  sub    $0x30,%ecx
  xor    %eax,%eax
  cmp    $0x9,%cl
  setbe  %al
L340:
  sub    $0x30,%esi
  xor    %ecx,%ecx
  cmp    $0x9,%sil
  setbe  %cl
  sub    %ecx,%eax
  cmove  %edx,%eax
L451:
  mov    %eax,%edx
  neg    %edx
  cmp    $0x2d,%bl
  cmove  %edx,%eax
  jmp    L115
L371:
  xor    %eax,%eax
  jmp    L340
L258:
  xor    %eax,%eax
  cmp    $0x2d,%r12b
  sete   %al
  add    %eax,%r9d
  movslq %r9d,%rdx
  movsbl (%r11,%rdx,1),%esi
  lea    -0x9(%rcx),%edx
  cmp    $0x4,%dl
  jbe    L272
  mov    %ecx,%edx
  and    $0xffffffef,%edx
  cmp    $0x20,%dl
  je     L272
  jmp    L249
  nopl   (%rax)
L314:
  xor    %ebp,%ebp
  cmp    $0x2d,%bl
  movzbl (%r11),%r12d
  sete   %bpl
  add    %ebp,%r8d
  movslq %r8d,%rax
  movzbl (%r10,%rax,1),%ecx
  test   %r12b,%r12b
  jne    L398
  xor    %r9d,%r9d
  jmp    L135
L527:
  xor    %r8d,%r8d
  jmp    L537
L480:
  movsbl (%rsi),%edx
  xor    %eax,%eax
  jmp    L517
L476:
  cmp    $0xa,%al
  mov    $0xffffffff,%eax
  cmovae %edx,%eax
  jmp    L451
L397:
  mov    $0x1,%eax
  jmp    L451
```

assistant: ```c
int mstrcmp(const char *str1, const char *str2, int f) {
  int i, j, f1, f2, n1, n2;
  if (f == 0)
    return strcmp(str1, str2);
  if (f == 1) {
    i = 0;
    while (str1[i] != 0 && str2[i] != 0 && (str1[i] == str2[i] || (((str1[i]) >= ('A') && (str1[i]) <= ('Z')) && ((str2[i]) >= ('a') && (str2[i]) <= ('z')) && (str1[i] - 'A' == str2[i] - 'a')) || (((str1[i]) >= ('a') && (str1[i]) <= ('z')) && ((str2[i]) >= ('A') && (str2[i]) <= ('Z')) && (str1[i] - 'a' == str2[i] - 'A'))))
      ++i;
    return str1[i] - ((int)str2[i]);
  }
  if (f == -1) {
    i = 0;
    j = 0;
    f = 0;
    while (str1[i] != 0 && ((str1[i]) == ' ' || (str1[i]) == '\r' || (str1[i]) == '\t' || (str1[i]) == '\n' || (str1[i]) == '\f' || (str1[i]) == '\v'))
      ++i;
    while (str2[j] != 0 && ((str2[j]) == ' ' || (str2[j]) == '\r' || (str2[j]) == '\t' || (str2[j]) == '\n' || (str2[j]) == '\f' || (str2[j]) == '\v'))
      ++j;
    i += n1 = str1[i] == '-';
    j += n2 = str2[j] == '-';
    while (str1[i] == '0' || ((str1[i]) == ' ' || (str1[i]) == '\r' || (str1[i]) == '\t' || (str1[i]) == '\n' || (str1[i]) == '\f' || (str1[i]) == '\v'))
      ++i;
    while (str2[j] == '0' || ((str2[j]) == ' ' || (str2[j]) == '\r' || (str2[j]) == '\t' || (str2[j]) == '\n' || (str2[j]) == '\f' || (str2[j]) == '\v'))
      ++j;
    f1 = ((str1[i]) >= ('0') && (str1[i]) <= ('9'));
    f2 = ((str2[j]) >= ('0') && (str2[j]) <= ('9'));
    if (!(f1 && f2))
      return (n1 ? -f1 : f1) - (n2 ? -f2 : f2);
    if (n1 ^ n2)
      return n2 - n1;
    f1 = 0;
    f2 = 0;
    while (str1[i] != 0 && str2[j] != 0) {
      if (((str1[i]) == ' ' || (str1[i]) == '\r' || (str1[i]) == '\t' || (str1[i]) == '\n' || (str1[i]) == '\f' || (str1[i]) == '\v')) {
        ++i;
        continue;
      }
      if (((str2[j]) == ' ' || (str2[j]) == '\r' || (str2[j]) == '\t' || (str2[j]) == '\n' || (str2[j]) == '\f' || (str2[j]) == '\v')) {
        ++j;
        continue;
      }
      if (((str1[i]) >= ('0') && (str1[i]) <= ('9')) && ((str2[j]) >= ('0') && (str2[j]) <= ('9')))
        (f) ? 0 : (f = (str1[i] - str2[j])), ++f1, ++f2, ++i, ++j;
      else
        return f1 += ((str1[i]) >= ('0') && (str1[i]) <= ('9')), f2 += ((str2[j]) >= ('0') && (str2[j]) <= ('9')), (((n2 = f1 - f2)) ? 0 : (n2 = f)), (n1 ? -n2 : n2);
    }
    return f1 += ((str1[i]) >= ('0') && (str1[i]) <= ('9')), f2 += ((str2[j]) >= ('0') && (str2[j]) <= ('9')), (((n2 = f1 - f2)) ? 0 : (n2 = f)), (n1 ? -n2 : n2);
  }
  return 0;
}
```