user: 请将以下的汇编代码转换成C语言代码:

```asm
<ss_swapmerge>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x458,%rsp
  mov    %rdi,0x18(%rsp)
  mov    %rsi,0x8(%rsp)
  mov    %rdx,%r15
  mov    %rcx,%rbx
  mov    %r8,%r12
  mov    %r9,0x20(%rsp)
  mov    %fs:0x28,%rax
  mov    %rax,0x448(%rsp)
  xor    %eax,%eax
  movl   $0x0,0x28(%rsp)
  mov    $0x0,%r14d
  movslq 0x490(%rsp),%rax
  mov    %rax,0x10(%rsp)
L625:
  mov    %r12,%rax
  sub    %rbx,%rax
  mov    %rax,%rbp
  sar    $0x2,%rbp
  cmp    0x10(%rsp),%rbp
  jg     L689
  cmp    %rbx,%r15
  jae    L409
  cmp    %r12,%rbx
  jb     L95
L409:
  mov    0x28(%rsp),%eax
  test   $0x1,%al
  jne    L2
  test   $0x2,%al
  je     L4
  movslq (%r15),%rax
  mov    0x8(%rsp),%rbx
  lea    (%rbx,%rax,4),%rdx
  mov    -0x4(%r15),%eax
  test   %eax,%eax
  js     L35
  movslq %eax,%rsi
  shl    $0x2,%rsi
L217:
  add    0x8(%rsp),%rsi
  mov    0x498(%rsp),%ecx
  mov    0x18(%rsp),%rdi
  mov    $0x0,%eax
  call   <ss_compare@plt>
  test   %eax,%eax
  jne    L4
L2:
  notl   (%r15)
L4:
  testb  $0x4,0x28(%rsp)
  je     L324
  movslq (%r12),%rax
  mov    0x8(%rsp),%rbx
  lea    (%rbx,%rax,4),%rdx
  mov    -0x4(%r12),%eax
  test   %eax,%eax
  js     L158
  movslq %eax,%rsi
  shl    $0x2,%rsi
L411:
  add    0x8(%rsp),%rsi
  mov    0x498(%rsp),%ecx
  mov    0x18(%rsp),%rdi
  mov    $0x0,%eax
  call   <ss_compare@plt>
  test   %eax,%eax
  jne    L324
  notl   (%r12)
L324:
  mov    %r14d,%edi
  not    %edi
  shr    $0x1f,%edi
  mov    $0x0,%eax
  call   <assert@plt>
  test   %r14d,%r14d
  jne    L635
L540:
  mov    0x448(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L274
  add    $0x458,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L95:
  sub    $0x8,%rsp
  mov    0x4a0(%rsp),%eax
  push   %rax
  mov    0x30(%rsp),%r9
  mov    %r12,%r8
  mov    %rbx,%rcx
  mov    %r15,%rdx
  mov    0x18(%rsp),%rsi
  mov    0x28(%rsp),%rdi
  mov    $0x0,%eax
  call   <ss_mergebackward@plt>
  add    $0x10,%rsp
  jmp    L409
L35:
  not    %eax
  movslq %eax,%rsi
  shl    $0x2,%rsi
  jmp    L217
L158:
  not    %eax
  movslq %eax,%rsi
  shl    $0x2,%rsi
  jmp    L411
L635:
  sub    $0x1,%r14d
  movslq %r14d,%rax
  shl    $0x5,%rax
  mov    0x40(%rsp,%rax,1),%r15
  mov    0x48(%rsp,%rax,1),%rbx
  mov    0x50(%rsp,%rax,1),%r12
  mov    0x58(%rsp,%rax,1),%eax
  mov    %eax,0x28(%rsp)
  jmp    L625
L689:
  mov    %rbx,%rcx
  sub    %r15,%rcx
  mov    %rcx,%rdx
  sar    $0x2,%rdx
  cmp    %rdx,0x10(%rsp)
  jl     L444
  cmp    %rbx,%r15
  jb     L275
L607:
  mov    0x28(%rsp),%eax
  test   $0x1,%al
  jne    L577
  test   $0x2,%al
  je     L195
  movslq (%r15),%rax
  mov    0x8(%rsp),%rbx
  lea    (%rbx,%rax,4),%rdx
  mov    -0x4(%r15),%eax
  test   %eax,%eax
  js     L425
  movslq %eax,%rsi
  shl    $0x2,%rsi
L247:
  add    0x8(%rsp),%rsi
  mov    0x498(%rsp),%ecx
  mov    0x18(%rsp),%rdi
  mov    $0x0,%eax
  call   <ss_compare@plt>
  test   %eax,%eax
  jne    L195
L577:
  notl   (%r15)
L195:
  testb  $0x4,0x28(%rsp)
  je     L611
  movslq (%r12),%rax
  mov    0x8(%rsp),%rbx
  lea    (%rbx,%rax,4),%rdx
  mov    -0x4(%r12),%eax
  test   %eax,%eax
  js     L377
  movslq %eax,%rsi
  shl    $0x2,%rsi
L560:
  add    0x8(%rsp),%rsi
  mov    0x498(%rsp),%ecx
  mov    0x18(%rsp),%rdi
  mov    $0x0,%eax
  call   <ss_compare@plt>
  test   %eax,%eax
  jne    L611
  notl   (%r12)
L611:
  mov    %r14d,%edi
  not    %edi
  shr    $0x1f,%edi
  mov    $0x0,%eax
  call   <assert@plt>
  test   %r14d,%r14d
  je     L540
  sub    $0x1,%r14d
  movslq %r14d,%rax
  shl    $0x5,%rax
  mov    0x40(%rsp,%rax,1),%r15
  mov    0x48(%rsp,%rax,1),%rbx
  mov    0x50(%rsp,%rax,1),%r12
  mov    0x58(%rsp,%rax,1),%eax
  mov    %eax,0x28(%rsp)
  jmp    L625
L275:
  sub    $0x8,%rsp
  mov    0x4a0(%rsp),%eax
  push   %rax
  mov    0x30(%rsp),%r9
  mov    %r12,%r8
  mov    %rbx,%rcx
  mov    %r15,%rdx
  mov    0x18(%rsp),%rsi
  mov    0x28(%rsp),%rdi
  mov    $0x0,%eax
  call   <ss_mergeforward@plt>
  add    $0x10,%rsp
  jmp    L607
L425:
  not    %eax
  movslq %eax,%rsi
  shl    $0x2,%rsi
  jmp    L247
L377:
  not    %eax
  movslq %eax,%rsi
  shl    $0x2,%rsi
  jmp    L560
L444:
  cmp    %rcx,%rax
  cmovg  %edx,%ebp
  mov    %ebp,%r13d
  sar    %r13d
  test   %ebp,%ebp
  jle    L413
  mov    $0x0,%eax
  mov    %r14d,0x2c(%rsp)
  mov    %eax,%r14d
  mov    %r15,0x30(%rsp)
  mov    %r12,0x38(%rsp)
  mov    0x18(%rsp),%r12
  mov    0x498(%rsp),%r15d
  jmp    L364
L236:
  not    %edx
  movslq %edx,%rdx
  shl    $0x2,%rdx
  jmp    L587
L44:
  not    %esi
  movslq %esi,%rsi
  shl    $0x2,%rsi
  jmp    L565
L626:
  lea    0x1(%r14,%r13,1),%r14d
  test   $0x1,%bpl
  sete   %al
  movzbl %al,%eax
  mov    %r13d,%ebp
  sub    %eax,%ebp
L303:
  mov    %ebp,%r13d
  sar    %r13d
  test   %ebp,%ebp
  jle    L187
L364:
  movslq %r14d,%rax
  movslq %r13d,%rdx
  add    %rdx,%rax
  lea    0x0(,%rax,4),%rcx
  mov    $0xfffffffffffffffc,%rdx
  sub    %rcx,%rdx
  mov    (%rbx,%rdx,1),%edx
  test   %edx,%edx
  js     L236
  movslq %edx,%rdx
  shl    $0x2,%rdx
L587:
  add    0x8(%rsp),%rdx
  mov    (%rbx,%rax,4),%esi
  test   %esi,%esi
  js     L44
  movslq %esi,%rsi
  shl    $0x2,%rsi
L565:
  add    0x8(%rsp),%rsi
  mov    %r15d,%ecx
  mov    %r12,%rdi
  mov    $0x0,%eax
  call   <ss_compare@plt>
  test   %eax,%eax
  js     L626
  mov    %r13d,%ebp
  jmp    L303
L187:
  mov    %r14d,%edx
  mov    0x2c(%rsp),%r14d
  mov    0x30(%rsp),%r15
  mov    0x38(%rsp),%r12
  test   %edx,%edx
  jg     L424
L413:
  movslq (%rbx),%rax
  mov    0x8(%rsp),%rcx
  lea    (%rcx,%rax,4),%rdx
  mov    -0x4(%rbx),%eax
  test   %eax,%eax
  js     L239
  movslq %eax,%rsi
  shl    $0x2,%rsi
L69:
  add    0x8(%rsp),%rsi
  mov    0x498(%rsp),%ecx
  mov    0x18(%rsp),%rdi
  mov    $0x0,%eax
  call   <ss_compare@plt>
  test   %eax,%eax
  jne    L266
  notl   (%rbx)
L266:
  mov    0x28(%rsp),%eax
  test   $0x1,%al
  jne    L321
  test   $0x2,%al
  je     L122
  movslq (%r15),%rax
  mov    0x8(%rsp),%rbx
  lea    (%rbx,%rax,4),%rdx
  mov    -0x4(%r15),%eax
  test   %eax,%eax
  js     L484
  movslq %eax,%rsi
  shl    $0x2,%rsi
L428:
  add    0x8(%rsp),%rsi
  mov    0x498(%rsp),%ecx
  mov    0x18(%rsp),%rdi
  mov    $0x0,%eax
  call   <ss_compare@plt>
  test   %eax,%eax
  jne    L122
L321:
  notl   (%r15)
L122:
  testb  $0x4,0x28(%rsp)
  je     L237
  movslq (%r12),%rax
  mov    0x8(%rsp),%rbx
  lea    (%rbx,%rax,4),%rdx
  mov    -0x4(%r12),%eax
  test   %eax,%eax
  js     L526
  movslq %eax,%rsi
  shl    $0x2,%rsi
L554:
  add    0x8(%rsp),%rsi
  mov    0x498(%rsp),%ecx
  mov    0x18(%rsp),%rdi
  mov    $0x0,%eax
  call   <ss_compare@plt>
  test   %eax,%eax
  jne    L237
  notl   (%r12)
L237:
  mov    %r14d,%edi
  not    %edi
  shr    $0x1f,%edi
  mov    $0x0,%eax
  call   <assert@plt>
  test   %r14d,%r14d
  je     L540
  sub    $0x1,%r14d
  movslq %r14d,%rax
  shl    $0x5,%rax
  mov    0x40(%rsp,%rax,1),%r15
  mov    0x48(%rsp,%rax,1),%rbx
  mov    0x50(%rsp,%rax,1),%r12
  mov    0x58(%rsp,%rax,1),%eax
  mov    %eax,0x28(%rsp)
  jmp    L625
L424:
  movslq %edx,%rax
  shl    $0x2,%rax
  mov    %rbx,%rbp
  sub    %rax,%rbp
  mov    %rbp,0x30(%rsp)
  lea    (%rbx,%rax,1),%r13
  mov    %r13,0x38(%rsp)
  mov    %rbx,%rsi
  mov    %rbp,%rdi
  mov    $0x0,%eax
  call   <ss_blockswap@plt>
  cmp    %r13,%r12
  jbe    L316
  mov    0x0(%r13),%eax
  test   %eax,%eax
  js     L645
  cmp    0x30(%rsp),%r15
  jb     L365
  mov    %rbx,%rbp
  mov    %rbx,%r13
  movl   $0x0,0x2c(%rsp)
  jmp    L682
L645:
  not    %eax
  mov    %eax,0x0(%r13)
  mov    %rbx,%r13
  mov    $0x0,%eax
  cmp    %rbp,%r15
  jb     L538
L570:
  or     $0x1,%eax
  mov    %eax,0x2c(%rsp)
  mov    %rbx,%rbp
  jmp    L682
L538:
  sub    $0x4,%r13
  cmpl   $0x0,0x0(%r13)
  js     L538
  mov    $0x4,%eax
  jmp    L570
L365:
  cmpl   $0x0,(%rbx)
  jns    L463
  mov    %rbx,%rbp
L370:
  add    $0x4,%rbp
  cmpl   $0x0,0x0(%rbp)
  js     L370
  mov    %rbx,%r13
  movl   $0x2,0x2c(%rsp)
  jmp    L682
L316:
  mov    %rbx,%rbp
  mov    %rbx,%r13
  movl   $0x0,0x2c(%rsp)
L682:
  mov    %r13,%rdx
  sub    %r15,%rdx
  mov    %r12,%rax
  sub    %rbp,%rax
  cmp    %rax,%rdx
  jle    L271
  mov    0x2c(%rsp),%eax
  test   $0x2,%al
  je     L446
  cmp    %rbp,%rbx
  sete   %dl
  mov    %eax,%ebx
  xor    $0x6,%eax
  test   %dl,%dl
  cmove  %ebx,%eax
  mov    %eax,0x2c(%rsp)
L446:
  cmp    $0x1f,%r14d
  setle  %dil
  movzbl %dil,%edi
  mov    $0x0,%eax
  call   <assert@plt>
  movslq %r14d,%rax
  shl    $0x5,%rax
  mov    %r15,0x40(%rsp,%rax,1)
  mov    0x30(%rsp),%rbx
  mov    %rbx,0x48(%rsp,%rax,1)
  mov    %r13,0x50(%rsp,%rax,1)
  mov    0x28(%rsp),%ebx
  mov    %ebx,%edx
  and    $0x3,%edx
  mov    0x2c(%rsp),%edi
  mov    %edi,%ecx
  and    $0x4,%ecx
  or     %ecx,%edx
  mov    %edx,0x58(%rsp,%rax,1)
  and    $0x4,%ebx
  mov    %edi,%eax
  and    $0x3,%eax
  or     %ebx,%eax
  mov    %eax,0x28(%rsp)
  lea    0x1(%r14),%r14d
  mov    0x38(%rsp),%rbx
  mov    %rbp,%r15
  jmp    L625
L463:
  mov    %rbx,%rbp
  mov    %rbx,%r13
  movl   $0x2,0x2c(%rsp)
  jmp    L682
L271:
  cmp    $0x1f,%r14d
  setle  %dil
  movzbl %dil,%edi
  mov    $0x0,%eax
  call   <assert@plt>
  movslq %r14d,%rax
  shl    $0x5,%rax
  mov    %rbp,0x40(%rsp,%rax,1)
  mov    0x38(%rsp),%rbx
  mov    %rbx,0x48(%rsp,%rax,1)
  mov    %r12,0x50(%rsp,%rax,1)
  mov    0x2c(%rsp),%ebx
  mov    %ebx,%edx
  and    $0x3,%edx
  mov    0x28(%rsp),%edi
  mov    %edi,%ecx
  and    $0x4,%ecx
  or     %ecx,%edx
  mov    %edx,0x58(%rsp,%rax,1)
  mov    %edi,%eax
  and    $0x3,%eax
  and    $0x4,%ebx
  mov    %ebx,%edx
  or     %eax,%edx
  mov    %edx,0x28(%rsp)
  lea    0x1(%r14),%r14d
  mov    %r13,%r12
  mov    0x30(%rsp),%rbx
  jmp    L625
L239:
  not    %eax
  movslq %eax,%rsi
  shl    $0x2,%rsi
  jmp    L69
L484:
  not    %eax
  movslq %eax,%rsi
  shl    $0x2,%rsi
  jmp    L428
L526:
  not    %eax
  movslq %eax,%rsi
  shl    $0x2,%rsi
  jmp    L554
L274:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
void ss_swapmerge(const unsigned char *T, const int *PA, int *first, int *middle, int *last, int *buf, int bufsize, int depth) {
  struct {
    int *a, *b, *c;
    int d;
  } stack[(32)];
  int *l, *r, *lm, *rm;
  int m, len, half;
  int ssize;
  int check, next;
  for (check = 0, ssize = 0;;) {
    if ((last - middle) <= bufsize) {
      if ((first < middle) && (middle < last)) {
        ss_mergebackward(T, PA, first, middle, last, buf, depth);
      }
      do {
        if (((check)&1) || (((check)&2) && (ss_compare(T, PA + ((0 <= (*((first)-1))) ? (*((first)-1)) : (~(*((first)-1)))), PA + *(first), depth) == 0))) {
          *(first) = ~*(first);
        }
        if (((check)&4) && ((ss_compare(T, PA + ((0 <= (*((last)-1))) ? (*((last)-1)) : (~(*((last)-1)))), PA + *(last), depth) == 0))) {
          *(last) = ~*(last);
        }
      } while (0);
      do {
        assert(0 <= ssize);
        if (ssize == 0) {
          return;
        }
        (first) = stack[--ssize].a, (middle) = stack[ssize].b, (last) = stack[ssize].c, (check) = stack[ssize].d;
      } while (0);
      continue;
    }
    if ((middle - first) <= bufsize) {
      if (first < middle) {
        ss_mergeforward(T, PA, first, middle, last, buf, depth);
      }
      do {
        if (((check)&1) || (((check)&2) && (ss_compare(T, PA + ((0 <= (*((first)-1))) ? (*((first)-1)) : (~(*((first)-1)))), PA + *(first), depth) == 0))) {
          *(first) = ~*(first);
        }
        if (((check)&4) && ((ss_compare(T, PA + ((0 <= (*((last)-1))) ? (*((last)-1)) : (~(*((last)-1)))), PA + *(last), depth) == 0))) {
          *(last) = ~*(last);
        }
      } while (0);
      do {
        assert(0 <= ssize);
        if (ssize == 0) {
          return;
        }
        (first) = stack[--ssize].a, (middle) = stack[ssize].b, (last) = stack[ssize].c, (check) = stack[ssize].d;
      } while (0);
      continue;
    }
    for (m = 0, len = (((middle - first) < (last - middle)) ? (middle - first) : (last - middle)), half = len >> 1; 0 < len; len = half, half >>= 1) {
      if (ss_compare(T, PA + ((0 <= (*(middle + m + half))) ? (*(middle + m + half)) : (~(*(middle + m + half)))), PA + ((0 <= (*(middle - m - half - 1))) ? (*(middle - m - half - 1)) : (~(*(middle - m - half - 1)))), depth) < 0) {
        m += half + 1;
        half -= (len & 1) ^ 1;
      }
    }
    if (0 < m) {
      lm = middle - m, rm = middle + m;
      ss_blockswap(lm, middle, m);
      l = r = middle, next = 0;
      if (rm < last) {
        if (*rm < 0) {
          *rm = ~*rm;
          if (first < lm) {
            for (; *--l < 0;) {
            }
            next |= 4;
          }
          next |= 1;
        } else if (first < lm) {
          for (; *r < 0; ++r) {
          }
          next |= 2;
        }
      }
      if ((l - first) <= (last - r)) {
        do {
          assert(ssize < (32));
          stack[ssize].a = (r), stack[ssize].b = (rm), stack[ssize].c = (last), stack[ssize++].d = ((next & 3) | (check & 4));
        } while (0);
        middle = lm, last = l, check = (check & 3) | (next & 4);
      } else {
        if ((next & 2) && (r == middle)) {
          next ^= 6;
        }
        do {
          assert(ssize < (32));
          stack[ssize].a = (first), stack[ssize].b = (lm), stack[ssize].c = (l), stack[ssize++].d = ((check & 3) | (next & 4));
        } while (0);
        first = r, middle = rm, check = (next & 3) | (check & 4);
      }
    } else {
      if (ss_compare(T, PA + ((0 <= (*(middle - 1))) ? (*(middle - 1)) : (~(*(middle - 1)))), PA + *middle, depth) == 0) {
        *middle = ~*middle;
      }
      do {
        if (((check)&1) || (((check)&2) && (ss_compare(T, PA + ((0 <= (*((first)-1))) ? (*((first)-1)) : (~(*((first)-1)))), PA + *(first), depth) == 0))) {
          *(first) = ~*(first);
        }
        if (((check)&4) && ((ss_compare(T, PA + ((0 <= (*((last)-1))) ? (*((last)-1)) : (~(*((last)-1)))), PA + *(last), depth) == 0))) {
          *(last) = ~*(last);
        }
      } while (0);
      do {
        assert(0 <= ssize);
        if (ssize == 0) {
          return;
        }
        (first) = stack[--ssize].a, (middle) = stack[ssize].b, (last) = stack[ssize].c, (check) = stack[ssize].d;
      } while (0);
    }
  }
}
```