user: What would the C source look like for the assembly code provided here?

```asm
<testcase>:
  endbr64
  push   %r15
  mov    $0x100,%esi
  mov    $0x80,%edi
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  call   <memalign@plt>
  mov    %rax,%r14
  test   %rax,%rax
  je     L76
L55:
  mov    $0x100,%esi
  mov    $0x80,%edi
  call   <memalign@plt>
  mov    %rax,%r13
  test   %rax,%rax
  je     L31
L73:
  mov    $0x1,%edi
  mov    $0x2710,%r12d
  lea    0x100(%r14),%rbp
  call   <srandom@plt>
L20:
  mov    %r14,%rbx
  nopw   0x0(%rax,%rax,1)
L29:
  xor    %eax,%eax
  add    $0x1,%rbx
  call   <random@plt>
  mov    %al,-0x1(%rbx)
  cmp    %rbp,%rbx
  jne    L29
  mov    $0x100,%edx
  mov    %r14,%rsi
  mov    %r13,%rdi
  call   <memcpy@plt>
  xor    %eax,%eax
  call   <random@plt>
  mov    %eax,%ebx
  xor    %eax,%eax
  call   <random@plt>
  mov    %ebx,%edx
  mov    %r13,%rsi
  mov    %r14,%rdi
  sar    $0x1f,%edx
  mov    %eax,%r8d
  shr    $0x18,%edx
  lea    (%rbx,%rdx,1),%eax
  movzbl %al,%eax
  sub    %edx,%eax
  cltq
  mov    %r8b,0x0(%r13,%rax,1)
  call   <test_one@plt>
  sub    $0x1,%r12
  jne    L20
  mov    $0x1,%edi
  mov    $0x2710,%r15d
  call   <srandom@plt>
L2:
  mov    %r14,%rbx
  nopl   0x0(%rax)
L42:
  xor    %eax,%eax
  add    $0x1,%rbx
  call   <random@plt>
  mov    %al,-0x1(%rbx)
  cmp    %rbp,%rbx
  jne    L42
  mov    $0x100,%edx
  mov    %r14,%rsi
  mov    %r13,%rdi
  mov    $0x20,%r12d
  call   <memcpy@plt>
  nopl   0x0(%rax)
L46:
  xor    %eax,%eax
  call   <random@plt>
  mov    %eax,%ebx
  xor    %eax,%eax
  call   <random@plt>
  mov    %eax,%r8d
  mov    %ebx,%eax
  sar    $0x1f,%eax
  shr    $0x18,%eax
  add    %eax,%ebx
  movzbl %bl,%ebx
  sub    %eax,%ebx
  movslq %ebx,%rbx
  mov    %r8b,0x0(%r13,%rbx,1)
  sub    $0x1,%r12
  jne    L46
  mov    %r13,%rsi
  mov    %r14,%rdi
  call   <test_one@plt>
  sub    $0x1,%r15
  jne    L2
  add    $0x8,%rsp
  xor    %eax,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L76:
  lea    D6(%rip),%rdi
  call   <perror@plt>
  mov    $0x1,%edi
  call   <exit@plt>
  jmp    L55
L31:
  lea    D6(%rip),%rdi
  call   <perror@plt>
  mov    $0x1,%edi
  call   <exit@plt>
  jmp    L73
```

tool_calls: name: unpack_data
arguments: tag: D6
data_type: string

tool: D6: memalign

assistant: ```c
int testcase(void) {
  char *s1;
  char *s2;
  unsigned long i;
  s1 = memalign(128, 256);
  if (!s1) {
    perror("memalign");
    exit(1);
  }
  s2 = memalign(128, 256);
  if (!s2) {
    perror("memalign");
    exit(1);
  }
  srandom(1);
  for (i = 0; i < 10000; i++) {
    unsigned long j;
    unsigned long change;
    for (j = 0; j < 256; j++) {
      s1[j] = random();
    }
    memcpy(s2, s1, 256);
    change = random() % 256;
    s2[change] = random() & 0xff;
    test_one(s1, s2);
  }
  srandom(1);
  for (i = 0; i < 10000; i++) {
    unsigned long j;
    unsigned long change;
    for (j = 0; j < 256; j++) {
      s1[j] = random();
    }
    memcpy(s2, s1, 256);
    for (j = 0; j < 256 / 8; j++) {
      change = random() % 256;
      s2[change] = random() & 0xff;
    }
    test_one(s1, s2);
  }
  return 0;
}
```