user: 这段汇编代码用C语言表示是什么样的:

```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)
L221:
  mov    %r12,%rax
  sub    %rbx,%rax
  mov    %rax,%rbp
  sar    $0x2,%rbp
  cmp    0x10(%rsp),%rbp
  jg     L661
  cmp    %rbx,%r15
  jae    L94
  cmp    %r12,%rbx
  jb     L501
L94:
  mov    0x28(%rsp),%eax
  test   $0x1,%al
  jne    L244
  test   $0x2,%al
  je     L172
  movslq (%r15),%rax
  mov    0x8(%rsp),%rbx
  lea    (%rbx,%rax,4),%rdx
  mov    -0x4(%r15),%eax
  test   %eax,%eax
  js     L251
  movslq %eax,%rsi
  shl    $0x2,%rsi
L457:
  add    0x8(%rsp),%rsi
  mov    0x498(%rsp),%ecx
  mov    0x18(%rsp),%rdi
  mov    $0x0,%eax
  call   <ss_compare@plt>
  test   %eax,%eax
  jne    L172
L244:
  notl   (%r15)
L172:
  testb  $0x4,0x28(%rsp)
  je     L114
  movslq (%r12),%rax
  mov    0x8(%rsp),%rbx
  lea    (%rbx,%rax,4),%rdx
  mov    -0x4(%r12),%eax
  test   %eax,%eax
  js     L552
  movslq %eax,%rsi
  shl    $0x2,%rsi
L455:
  add    0x8(%rsp),%rsi
  mov    0x498(%rsp),%ecx
  mov    0x18(%rsp),%rdi
  mov    $0x0,%eax
  call   <ss_compare@plt>
  test   %eax,%eax
  jne    L114
  notl   (%r12)
L114:
  mov    %r14d,%edi
  not    %edi
  shr    $0x1f,%edi
  mov    $0x0,%eax
  call   <assert@plt>
  test   %r14d,%r14d
  jne    L409
L610:
  mov    0x448(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L212
  add    $0x458,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L501:
  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    L94
L251:
  not    %eax
  movslq %eax,%rsi
  shl    $0x2,%rsi
  jmp    L457
L552:
  not    %eax
  movslq %eax,%rsi
  shl    $0x2,%rsi
  jmp    L455
L409:
  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    L221
L661:
  mov    %rbx,%rcx
  sub    %r15,%rcx
  mov    %rcx,%rdx
  sar    $0x2,%rdx
  cmp    %rdx,0x10(%rsp)
  jl     L698
  cmp    %rbx,%r15
  jb     L134
L468:
  mov    0x28(%rsp),%eax
  test   $0x1,%al
  jne    L540
  test   $0x2,%al
  je     L185
  movslq (%r15),%rax
  mov    0x8(%rsp),%rbx
  lea    (%rbx,%rax,4),%rdx
  mov    -0x4(%r15),%eax
  test   %eax,%eax
  js     L37
  movslq %eax,%rsi
  shl    $0x2,%rsi
L74:
  add    0x8(%rsp),%rsi
  mov    0x498(%rsp),%ecx
  mov    0x18(%rsp),%rdi
  mov    $0x0,%eax
  call   <ss_compare@plt>
  test   %eax,%eax
  jne    L185
L540:
  notl   (%r15)
L185:
  testb  $0x4,0x28(%rsp)
  je     L107
  movslq (%r12),%rax
  mov    0x8(%rsp),%rbx
  lea    (%rbx,%rax,4),%rdx
  mov    -0x4(%r12),%eax
  test   %eax,%eax
  js     L38
  movslq %eax,%rsi
  shl    $0x2,%rsi
L110:
  add    0x8(%rsp),%rsi
  mov    0x498(%rsp),%ecx
  mov    0x18(%rsp),%rdi
  mov    $0x0,%eax
  call   <ss_compare@plt>
  test   %eax,%eax
  jne    L107
  notl   (%r12)
L107:
  mov    %r14d,%edi
  not    %edi
  shr    $0x1f,%edi
  mov    $0x0,%eax
  call   <assert@plt>
  test   %r14d,%r14d
  je     L610
  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    L221
L134:
  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    L468
L37:
  not    %eax
  movslq %eax,%rsi
  shl    $0x2,%rsi
  jmp    L74
L38:
  not    %eax
  movslq %eax,%rsi
  shl    $0x2,%rsi
  jmp    L110
L698:
  cmp    %rcx,%rax
  cmovg  %edx,%ebp
  mov    %ebp,%r13d
  sar    %r13d
  test   %ebp,%ebp
  jle    L121
  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    L18
L492:
  not    %edx
  movslq %edx,%rdx
  shl    $0x2,%rdx
  jmp    L310
L316:
  not    %esi
  movslq %esi,%rsi
  shl    $0x2,%rsi
  jmp    L305
L624:
  lea    0x1(%r14,%r13,1),%r14d
  test   $0x1,%bpl
  sete   %al
  movzbl %al,%eax
  mov    %r13d,%ebp
  sub    %eax,%ebp
L680:
  mov    %ebp,%r13d
  sar    %r13d
  test   %ebp,%ebp
  jle    L4
L18:
  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     L492
  movslq %edx,%rdx
  shl    $0x2,%rdx
L310:
  add    0x8(%rsp),%rdx
  mov    (%rbx,%rax,4),%esi
  test   %esi,%esi
  js     L316
  movslq %esi,%rsi
  shl    $0x2,%rsi
L305:
  add    0x8(%rsp),%rsi
  mov    %r15d,%ecx
  mov    %r12,%rdi
  mov    $0x0,%eax
  call   <ss_compare@plt>
  test   %eax,%eax
  js     L624
  mov    %r13d,%ebp
  jmp    L680
L4:
  mov    %r14d,%edx
  mov    0x2c(%rsp),%r14d
  mov    0x30(%rsp),%r15
  mov    0x38(%rsp),%r12
  test   %edx,%edx
  jg     L225
L121:
  movslq (%rbx),%rax
  mov    0x8(%rsp),%rcx
  lea    (%rcx,%rax,4),%rdx
  mov    -0x4(%rbx),%eax
  test   %eax,%eax
  js     L372
  movslq %eax,%rsi
  shl    $0x2,%rsi
L532:
  add    0x8(%rsp),%rsi
  mov    0x498(%rsp),%ecx
  mov    0x18(%rsp),%rdi
  mov    $0x0,%eax
  call   <ss_compare@plt>
  test   %eax,%eax
  jne    L363
  notl   (%rbx)
L363:
  mov    0x28(%rsp),%eax
  test   $0x1,%al
  jne    L620
  test   $0x2,%al
  je     L347
  movslq (%r15),%rax
  mov    0x8(%rsp),%rbx
  lea    (%rbx,%rax,4),%rdx
  mov    -0x4(%r15),%eax
  test   %eax,%eax
  js     L14
  movslq %eax,%rsi
  shl    $0x2,%rsi
L307:
  add    0x8(%rsp),%rsi
  mov    0x498(%rsp),%ecx
  mov    0x18(%rsp),%rdi
  mov    $0x0,%eax
  call   <ss_compare@plt>
  test   %eax,%eax
  jne    L347
L620:
  notl   (%r15)
L347:
  testb  $0x4,0x28(%rsp)
  je     L20
  movslq (%r12),%rax
  mov    0x8(%rsp),%rbx
  lea    (%rbx,%rax,4),%rdx
  mov    -0x4(%r12),%eax
  test   %eax,%eax
  js     L245
  movslq %eax,%rsi
  shl    $0x2,%rsi
L443:
  add    0x8(%rsp),%rsi
  mov    0x498(%rsp),%ecx
  mov    0x18(%rsp),%rdi
  mov    $0x0,%eax
  call   <ss_compare@plt>
  test   %eax,%eax
  jne    L20
  notl   (%r12)
L20:
  mov    %r14d,%edi
  not    %edi
  shr    $0x1f,%edi
  mov    $0x0,%eax
  call   <assert@plt>
  test   %r14d,%r14d
  je     L610
  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    L221
L225:
  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    L584
  mov    0x0(%r13),%eax
  test   %eax,%eax
  js     L437
  cmp    0x30(%rsp),%r15
  jb     L381
  mov    %rbx,%rbp
  mov    %rbx,%r13
  movl   $0x0,0x2c(%rsp)
  jmp    L509
L437:
  not    %eax
  mov    %eax,0x0(%r13)
  mov    %rbx,%r13
  mov    $0x0,%eax
  cmp    %rbp,%r15
  jb     L149
L5:
  or     $0x1,%eax
  mov    %eax,0x2c(%rsp)
  mov    %rbx,%rbp
  jmp    L509
L149:
  sub    $0x4,%r13
  cmpl   $0x0,0x0(%r13)
  js     L149
  mov    $0x4,%eax
  jmp    L5
L381:
  cmpl   $0x0,(%rbx)
  jns    L699
  mov    %rbx,%rbp
L403:
  add    $0x4,%rbp
  cmpl   $0x0,0x0(%rbp)
  js     L403
  mov    %rbx,%r13
  movl   $0x2,0x2c(%rsp)
  jmp    L509
L584:
  mov    %rbx,%rbp
  mov    %rbx,%r13
  movl   $0x0,0x2c(%rsp)
L509:
  mov    %r13,%rdx
  sub    %r15,%rdx
  mov    %r12,%rax
  sub    %rbp,%rax
  cmp    %rax,%rdx
  jle    L299
  mov    0x2c(%rsp),%eax
  test   $0x2,%al
  je     L589
  cmp    %rbp,%rbx
  sete   %dl
  mov    %eax,%ebx
  xor    $0x6,%eax
  test   %dl,%dl
  cmove  %ebx,%eax
  mov    %eax,0x2c(%rsp)
L589:
  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    L221
L699:
  mov    %rbx,%rbp
  mov    %rbx,%r13
  movl   $0x2,0x2c(%rsp)
  jmp    L509
L299:
  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    L221
L372:
  not    %eax
  movslq %eax,%rsi
  shl    $0x2,%rsi
  jmp    L532
L14:
  not    %eax
  movslq %eax,%rsi
  shl    $0x2,%rsi
  jmp    L307
L245:
  not    %eax
  movslq %eax,%rsi
  shl    $0x2,%rsi
  jmp    L443
L212:
  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);
    }
  }
}
```