user: 提供的汇编代码用C语言表示会是什么样子：

```asm
<deinterlace_16>:
  endbr64
  test   %r8d,%r8d
  jle    L75
  push   %r15
  mov    %rdx,%r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  mov    %rdi,%rbx
  sub    $0x18,%rsp
  mov    0x50(%rsp),%eax
  test   %eax,%eax
  jne    L21
  lea    -0x1(%r8),%eax
  movslq %ecx,%rcx
  mov    %rsi,%r13
  lea    0x4(%rdi,%rax,4),%rax
  lea    0x0(,%rcx,4),%r12
  mov    %rax,0x8(%rsp)
  nopl   0x0(%rax)
L89:
  movd   (%rbx),%xmm1
  movd   0x0(%r13),%xmm2
  xor    %eax,%eax
  movzwl (%rbx),%ebp
  movzwl 0x0(%r13),%r14d
  punpckldq %xmm2,%xmm1
  movq   %xmm1,(%rsp)
  call   <isBigEndian@plt>
  test   %rax,%rax
  je     L17
  rol    $0x8,%bp
  rol    $0x8,%r14w
  add    $0x4,%rbx
  add    $0x4,%r13
  movzwl %bp,%ebp
  movzwl %r14w,%r14d
  movd   %ebp,%xmm0
  movd   %r14d,%xmm3
  punpckldq %xmm3,%xmm0
  movq   %xmm0,(%r15)
  add    %r12,%r15
  cmp    0x8(%rsp),%rbx
  jne    L89
L9:
  add    $0x18,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  xchg   %ax,%ax
L21:
  movslq %ecx,%rcx
  mov    %r9d,%r13d
  mov    %rsi,%r12
  mov    %rdx,%r14
  lea    0x0(,%rcx,4),%rax
  mov    %rax,(%rsp)
  lea    -0x1(%r8),%eax
  lea    0x4(%rdi,%rax,4),%rax
  mov    %rax,0x8(%rsp)
  cs nopw 0x0(%rax,%rax,1)
L59:
  mov    (%r12),%eax
  mov    0x50(%rsp),%edi
  mov    %r13d,%ecx
  mov    (%rbx),%ebp
  imul   %eax,%edi
  sar    %cl,%edi
  sub    %edi,%ebp
  lea    (%rax,%rbp,1),%r15d
  xor    %eax,%eax
  call   <isBigEndian@plt>
  test   %rax,%rax
  je     L73
  mov    %r15d,%eax
  mov    %ebp,%edi
  mov    %ebp,%edx
  add    $0x4,%rbx
  shl    $0x8,%eax
  shl    $0x8,%edi
  movzbl %dh,%ecx
  add    $0x4,%r12
  movzwl %ax,%r8d
  mov    %r15d,%eax
  movzwl %di,%edi
  movzbl %ah,%eax
  or     %edi,%ecx
  or     %r8d,%eax
  mov    %ecx,0x4(%r14)
  mov    %eax,(%r14)
  add    (%rsp),%r14
  cmp    0x8(%rsp),%rbx
  jne    L59
  jmp    L9
  nopl   (%rax)
L17:
  mov    (%rsp),%rax
  add    $0x4,%rbx
  add    $0x4,%r13
  mov    %rax,(%r15)
  add    %r12,%r15
  cmp    %rbx,0x8(%rsp)
  jne    L89
  add    $0x18,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   0x0(%rax)
L73:
  mov    %r15d,(%r14)
  add    $0x4,%rbx
  add    $0x4,%r12
  mov    %ebp,0x4(%r14)
  add    (%rsp),%r14
  cmp    %rbx,0x8(%rsp)
  jne    L59
  add    $0x18,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   (%rax)
L75:
  ret
```

assistant: ```c
void deinterlace_16(int32_t *buffer_a, int32_t *buffer_b, int16_t *buffer_out, int numchannels, int numsamples, uint8_t interlacing_shift, uint8_t interlacing_leftweight) {
  int i;
  if (numsamples <= 0)
    return;
  if (interlacing_leftweight) {
    for (i = 0; i < numsamples; i++) {
      int32_t difference, midright;
      int16_t left;
      int16_t right;
      midright = buffer_a[i];
      difference = buffer_b[i];
      right = midright - ((difference * interlacing_leftweight) >> interlacing_shift);
      left = right + difference;
      if (isBigEndian()) {
        do {
          left = (((left)&0x00FF) << 0x08) | (((left)&0xFF00) >> 0x08);
        } while (0);
        do {
          right = (((right)&0x00FF) << 0x08) | (((right)&0xFF00) >> 0x08);
        } while (0);
      }
      buffer_out[i * numchannels] = left;
      buffer_out[i * numchannels + 1] = right;
    }
    return;
  }
  for (i = 0; i < numsamples; i++) {
    int16_t left, right;
    left = buffer_a[i];
    right = buffer_b[i];
    if (isBigEndian()) {
      do {
        left = (((left)&0x00FF) << 0x08) | (((left)&0xFF00) >> 0x08);
      } while (0);
      do {
        right = (((right)&0x00FF) << 0x08) | (((right)&0xFF00) >> 0x08);
      } while (0);
    }
    buffer_out[i * numchannels] = left;
    buffer_out[i * numchannels + 1] = right;
  }
}
```