user: 请将以下的汇编代码转换成C语言代码：

```asm
<process_buffer>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x1000,%rsp
  orq    $0x0,(%rsp)
  sub    $0x1b0,%rsp
  mov    %rdi,-0x11a8(%rbp)
  mov    %esi,-0x11ac(%rbp)
  mov    %edx,-0x11b0(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  movl   $0x0,-0x1198(%rbp)
  movl   $0x0,-0x1194(%rbp)
  mov    -0x11ac(%rbp),%eax
  mov    %eax,%edx
  shr    $0x1f,%edx
  add    %edx,%eax
  sar    %eax
  sub    $0x1164,%eax
  mov    %eax,-0x118c(%rbp)
  movl   $0x0,-0x1190(%rbp)
  jmp    L94
L123:
  mov    -0x1190(%rbp),%eax
  add    %eax,%eax
  cltq
  add    $0x1,%rax
  lea    0x0(,%rax,4),%rdx
  mov    -0x11a8(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%edx
  mov    -0x1190(%rbp),%eax
  add    %eax,%eax
  cltq
  lea    0x0(,%rax,4),%rcx
  mov    -0x11a8(%rbp),%rax
  add    %rcx,%rax
  mov    (%rax),%eax
  mov    %edx,%esi
  mov    %eax,%edi
  call   <phi_difference@plt>
  mov    %rax,-0x1160(%rbp)
  mov    -0x1190(%rbp),%eax
  add    %eax,%eax
  cltq
  add    $0x2,%rax
  lea    0x0(,%rax,4),%rdx
  mov    -0x11a8(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%edx
  mov    -0x1190(%rbp),%eax
  add    %eax,%eax
  cltq
  add    $0x1,%rax
  lea    0x0(,%rax,4),%rcx
  mov    -0x11a8(%rbp),%rax
  add    %rcx,%rax
  mov    (%rax),%eax
  mov    %edx,%esi
  mov    %eax,%edi
  call   <phi_difference@plt>
  mov    %rax,-0x1158(%rbp)
  mov    -0x1198(%rbp),%eax
  lea    (%rax,%rax,1),%edx
  cmpq   $0x0,-0x1160(%rbp)
  setg   %al
  movzbl %al,%eax
  or     %edx,%eax
  mov    %eax,-0x1198(%rbp)
  mov    -0x1194(%rbp),%eax
  lea    (%rax,%rax,1),%edx
  cmpq   $0x0,-0x1158(%rbp)
  setg   %al
  movzbl %al,%eax
  or     %edx,%eax
  mov    %eax,-0x1194(%rbp)
  cmpl   $0x23,-0x1190(%rbp)
  jle    L193
  mov    -0x1198(%rbp),%eax
  mov    $0xacdda4e2,%esi
  mov    %eax,%edi
  call   <sync_word_fuzzy_compare@plt>
  test   %rax,%rax
  jne    L136
  mov    -0x1194(%rbp),%eax
  mov    $0xacdda4e2,%esi
  mov    %eax,%edi
  call   <sync_word_fuzzy_compare@plt>
  test   %rax,%rax
  je     L86
L136:
  mov    -0x1190(%rbp),%eax
  sub    $0x23,%eax
  mov    %eax,-0x1174(%rbp)
  mov    -0x1198(%rbp),%eax
  mov    $0xacdda4e2,%esi
  mov    %eax,%edi
  call   <sync_word_fuzzy_compare@plt>
  test   %rax,%rax
  sete   %al
  movzbl %al,%eax
  mov    %eax,-0x1170(%rbp)
  mov    -0x1174(%rbp),%eax
  lea    (%rax,%rax,1),%edx
  mov    -0x1170(%rbp),%eax
  add    %edx,%eax
  mov    %eax,-0x116c(%rbp)
  movl   $0xffffffff,-0x11a0(%rbp)
  movl   $0xffffffff,-0x119c(%rbp)
  mov    -0x116c(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x11a8(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  lea    -0x11a0(%rbp),%rdx
  lea    -0x1150(%rbp),%rax
  mov    %rax,%rsi
  mov    %rcx,%rdi
  call   <demod_adsb_frame@plt>
  mov    %eax,-0x1168(%rbp)
  mov    -0x116c(%rbp),%eax
  cltq
  add    $0x1,%rax
  lea    0x0(,%rax,4),%rdx
  mov    -0x11a8(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  lea    -0x119c(%rbp),%rdx
  lea    -0x8b0(%rbp),%rax
  mov    %rax,%rsi
  mov    %rcx,%rdi
  call   <demod_adsb_frame@plt>
  mov    %eax,-0x1164(%rbp)
  cmpl   $0x0,-0x1168(%rbp)
  je     L179
  mov    -0x11a0(%rbp),%edx
  mov    -0x119c(%rbp),%eax
  cmp    %eax,%edx
  jg     L179
  mov    -0x11a0(%rbp),%edx
  mov    -0x11b0(%rbp),%ecx
  mov    -0x116c(%rbp),%eax
  add    %eax,%ecx
  lea    -0x1150(%rbp),%rax
  mov    %rax,%rsi
  mov    %ecx,%edi
  call   <handle_adsb_frame@plt>
  mov    -0x1174(%rbp),%edx
  mov    -0x1168(%rbp),%eax
  add    %edx,%eax
  mov    %eax,-0x1190(%rbp)
  jmp    L157
L179:
  cmpl   $0x0,-0x1164(%rbp)
  je     L60
  mov    -0x119c(%rbp),%edx
  mov    -0x11a0(%rbp),%eax
  cmp    %eax,%edx
  jg     L60
  mov    -0x119c(%rbp),%edx
  mov    -0x11b0(%rbp),%ecx
  mov    -0x116c(%rbp),%eax
  add    %ecx,%eax
  lea    0x1(%rax),%ecx
  lea    -0x8b0(%rbp),%rax
  mov    %rax,%rsi
  mov    %ecx,%edi
  call   <handle_adsb_frame@plt>
  mov    -0x1174(%rbp),%edx
  mov    -0x1164(%rbp),%eax
  add    %edx,%eax
  mov    %eax,-0x1190(%rbp)
  jmp    L157
L86:
  mov    -0x1198(%rbp),%eax
  mov    $0x53225b1d,%esi
  mov    %eax,%edi
  call   <sync_word_fuzzy_compare@plt>
  test   %rax,%rax
  jne    L172
  mov    -0x1194(%rbp),%eax
  mov    $0x53225b1d,%esi
  mov    %eax,%edi
  call   <sync_word_fuzzy_compare@plt>
  test   %rax,%rax
  je     L157
L172:
  mov    -0x1190(%rbp),%eax
  sub    $0x23,%eax
  mov    %eax,-0x1188(%rbp)
  mov    -0x1198(%rbp),%eax
  mov    $0x53225b1d,%esi
  mov    %eax,%edi
  call   <sync_word_fuzzy_compare@plt>
  test   %rax,%rax
  sete   %al
  movzbl %al,%eax
  mov    %eax,-0x1184(%rbp)
  mov    -0x1188(%rbp),%eax
  lea    (%rax,%rax,1),%edx
  mov    -0x1184(%rbp),%eax
  add    %edx,%eax
  mov    %eax,-0x1180(%rbp)
  movl   $0xffffffff,-0x11a0(%rbp)
  movl   $0xffffffff,-0x119c(%rbp)
  mov    -0x1180(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x11a8(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  lea    -0x11a0(%rbp),%rdx
  lea    -0x1150(%rbp),%rax
  mov    %rax,%rsi
  mov    %rcx,%rdi
  call   <demod_uplink_frame@plt>
  mov    %eax,-0x117c(%rbp)
  mov    -0x1180(%rbp),%eax
  cltq
  add    $0x1,%rax
  lea    0x0(,%rax,4),%rdx
  mov    -0x11a8(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  lea    -0x119c(%rbp),%rdx
  lea    -0x8b0(%rbp),%rax
  mov    %rax,%rsi
  mov    %rcx,%rdi
  call   <demod_uplink_frame@plt>
  mov    %eax,-0x1178(%rbp)
  cmpl   $0x0,-0x117c(%rbp)
  je     L40
  mov    -0x11a0(%rbp),%edx
  mov    -0x119c(%rbp),%eax
  cmp    %eax,%edx
  jg     L40
  mov    -0x11a0(%rbp),%edx
  mov    -0x11b0(%rbp),%ecx
  mov    -0x1180(%rbp),%eax
  add    %eax,%ecx
  lea    -0x1150(%rbp),%rax
  mov    %rax,%rsi
  mov    %ecx,%edi
  call   <handle_uplink_frame@plt>
  mov    -0x1188(%rbp),%edx
  mov    -0x117c(%rbp),%eax
  add    %edx,%eax
  mov    %eax,-0x1190(%rbp)
  jmp    L157
L40:
  cmpl   $0x0,-0x1178(%rbp)
  je     L157
  mov    -0x119c(%rbp),%edx
  mov    -0x11a0(%rbp),%eax
  cmp    %eax,%edx
  jg     L157
  mov    -0x119c(%rbp),%edx
  mov    -0x11b0(%rbp),%ecx
  mov    -0x1180(%rbp),%eax
  add    %ecx,%eax
  lea    0x1(%rax),%ecx
  lea    -0x8b0(%rbp),%rax
  mov    %rax,%rsi
  mov    %ecx,%edi
  call   <handle_uplink_frame@plt>
  mov    -0x1188(%rbp),%edx
  mov    -0x1178(%rbp),%eax
  add    %edx,%eax
  mov    %eax,-0x1190(%rbp)
  jmp    L157
L193:
  nop
  jmp    L157
L60:
  nop
L157:
  addl   $0x1,-0x1190(%rbp)
L94:
  mov    -0x1190(%rbp),%eax
  cmp    -0x118c(%rbp),%eax
  jl     L123
  mov    -0x1190(%rbp),%eax
  sub    $0x24,%eax
  add    %eax,%eax
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L18
  call   <__stack_chk_fail@plt>
L18:
  leave
  ret
```

assistant: ```c
int process_buffer(uint16_t *phi, int len, uint64_t offset) {
  uint64_t sync0 = 0, sync1 = 0;
  int lenbits;
  int bit;
  uint8_t demod_buf_a[(((6) * ((576) + 160)) / 8)];
  uint8_t demod_buf_b[(((6) * ((576) + 160)) / 8)];
  lenbits = len / 2 - ((36) + ((6) * ((576) + 160)));
  for (bit = 0; bit < lenbits; ++bit) {
    int16_t dphi0 = phi_difference(phi[bit * 2], phi[bit * 2 + 1]);
    int16_t dphi1 = phi_difference(phi[bit * 2 + 1], phi[bit * 2 + 2]);
    sync0 = ((sync0 << 1) | (dphi0 > 0 ? 1 : 0)) & ((((uint64_t)1) << (36)) - 1);
    sync1 = ((sync1 << 1) | (dphi1 > 0 ? 1 : 0)) & ((((uint64_t)1) << (36)) - 1);
    if (bit < (36))
      continue;
    if (sync_word_fuzzy_compare(sync0, 0xEACDDA4E2UL) || sync_word_fuzzy_compare(sync1, 0xEACDDA4E2UL)) {
      int startbit = (bit - (36) + 1);
      int shift = (sync_word_fuzzy_compare(sync0, 0xEACDDA4E2UL) ? 0 : 1);
      int index = startbit * 2 + shift;
      int skip_0, skip_1;
      int rs_0 = -1, rs_1 = -1;
      skip_0 = demod_adsb_frame(phi + index, demod_buf_a, &rs_0);
      skip_1 = demod_adsb_frame(phi + index + 1, demod_buf_b, &rs_1);
      if (skip_0 && rs_0 <= rs_1) {
        handle_adsb_frame(offset + index, demod_buf_a, rs_0);
        bit = startbit + skip_0;
        continue;
      } else if (skip_1 && rs_1 <= rs_0) {
        handle_adsb_frame(offset + index + 1, demod_buf_b, rs_1);
        bit = startbit + skip_1;
        continue;
      } else {
      }
    } else if (sync_word_fuzzy_compare(sync0, 0x153225B1DUL) || sync_word_fuzzy_compare(sync1, 0x153225B1DUL)) {
      int startbit = (bit - (36) + 1);
      int shift = (sync_word_fuzzy_compare(sync0, 0x153225B1DUL) ? 0 : 1);
      int index = startbit * 2 + shift;
      int skip_0, skip_1;
      int rs_0 = -1, rs_1 = -1;
      skip_0 = demod_uplink_frame(phi + index, demod_buf_a, &rs_0);
      skip_1 = demod_uplink_frame(phi + index + 1, demod_buf_b, &rs_1);
      if (skip_0 && rs_0 <= rs_1) {
        handle_uplink_frame(offset + index, demod_buf_a, rs_0);
        bit = startbit + skip_0;
        continue;
      } else if (skip_1 && rs_1 <= rs_0) {
        handle_uplink_frame(offset + index + 1, demod_buf_b, rs_1);
        bit = startbit + skip_1;
        continue;
      } else {
      }
    }
  }
  return (bit - (36)) * 2;
}
```