user: 下面的汇编指令对应的C源代码是什么：

```asm
<Gauss_elimination>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %r12
  push   %rbx
  sub    $0x50,%rsp
  mov    %edi,-0x44(%rbp)
  mov    %rsi,-0x50(%rbp)
  mov    %rdx,-0x58(%rbp)
  mov    -0x44(%rbp),%eax
  lea    0x1(%rax),%ebx
  movslq %ebx,%rax
  sub    $0x1,%rax
  mov    %rax,-0x28(%rbp)
  movslq %ebx,%rax
  mov    %rax,%r8
  mov    $0x0,%r9d
  movl   $0x0,-0x3c(%rbp)
  jmp    L172
L110:
  mov    -0x3c(%rbp),%eax
  mov    %eax,-0x34(%rbp)
  mov    -0x3c(%rbp),%eax
  add    $0x1,%eax
  mov    %eax,-0x38(%rbp)
  jmp    L105
L74:
  mov    -0x38(%rbp),%eax
  movslq %eax,%rdx
  movslq %ebx,%rax
  imul   %rdx,%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x50(%rbp),%rax
  add    %rax,%rdx
  mov    -0x3c(%rbp),%eax
  cltq
  mov    (%rdx,%rax,8),%rax
  movq   %rax,%xmm0
  call   <fabs@plt>
  mov    %rax,%r12
  mov    -0x34(%rbp),%eax
  movslq %eax,%rdx
  movslq %ebx,%rax
  imul   %rdx,%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x50(%rbp),%rax
  add    %rax,%rdx
  mov    -0x3c(%rbp),%eax
  cltq
  mov    (%rdx,%rax,8),%rax
  movq   %rax,%xmm0
  call   <fabs@plt>
  cmp    %rax,%r12
  jle    L121
  mov    -0x38(%rbp),%eax
  mov    %eax,-0x34(%rbp)
L121:
  addl   $0x1,-0x38(%rbp)
L105:
  mov    -0x38(%rbp),%eax
  cmp    -0x44(%rbp),%eax
  jl     L74
  mov    -0x34(%rbp),%eax
  cmp    -0x3c(%rbp),%eax
  je     L150
  mov    -0x3c(%rbp),%eax
  mov    %eax,-0x38(%rbp)
  jmp    L71
L53:
  mov    -0x3c(%rbp),%eax
  movslq %eax,%rdx
  movslq %ebx,%rax
  imul   %rdx,%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x50(%rbp),%rax
  add    %rax,%rdx
  mov    -0x38(%rbp),%eax
  cltq
  movsd  (%rdx,%rax,8),%xmm0
  movsd  %xmm0,-0x20(%rbp)
  mov    -0x34(%rbp),%eax
  movslq %eax,%rdx
  movslq %ebx,%rax
  imul   %rdx,%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x50(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  mov    -0x3c(%rbp),%eax
  movslq %eax,%rdx
  movslq %ebx,%rax
  imul   %rdx,%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x50(%rbp),%rax
  add    %rax,%rdx
  mov    -0x38(%rbp),%eax
  cltq
  movsd  (%rcx,%rax,8),%xmm0
  mov    -0x38(%rbp),%eax
  cltq
  movsd  %xmm0,(%rdx,%rax,8)
  mov    -0x34(%rbp),%eax
  movslq %eax,%rdx
  movslq %ebx,%rax
  imul   %rdx,%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x50(%rbp),%rax
  add    %rax,%rdx
  mov    -0x38(%rbp),%eax
  cltq
  movsd  -0x20(%rbp),%xmm0
  movsd  %xmm0,(%rdx,%rax,8)
  addl   $0x1,-0x38(%rbp)
L71:
  mov    -0x38(%rbp),%eax
  cmp    -0x44(%rbp),%eax
  jle    L53
L150:
  mov    -0x3c(%rbp),%eax
  add    $0x1,%eax
  mov    %eax,-0x38(%rbp)
  jmp    L154
L79:
  mov    -0x38(%rbp),%eax
  movslq %eax,%rdx
  movslq %ebx,%rax
  imul   %rdx,%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x50(%rbp),%rax
  add    %rax,%rdx
  mov    -0x3c(%rbp),%eax
  cltq
  movsd  (%rdx,%rax,8),%xmm0
  mov    -0x3c(%rbp),%eax
  movslq %eax,%rdx
  movslq %ebx,%rax
  imul   %rdx,%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x50(%rbp),%rax
  add    %rax,%rdx
  mov    -0x3c(%rbp),%eax
  cltq
  movsd  (%rdx,%rax,8),%xmm1
  divsd  %xmm1,%xmm0
  movsd  %xmm0,-0x18(%rbp)
  movl   $0x0,-0x34(%rbp)
  jmp    L4
L15:
  mov    -0x38(%rbp),%eax
  movslq %eax,%rdx
  movslq %ebx,%rax
  imul   %rdx,%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x50(%rbp),%rax
  add    %rax,%rdx
  mov    -0x34(%rbp),%eax
  cltq
  movsd  (%rdx,%rax,8),%xmm0
  mov    -0x3c(%rbp),%eax
  movslq %eax,%rdx
  movslq %ebx,%rax
  imul   %rdx,%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x50(%rbp),%rax
  add    %rax,%rdx
  mov    -0x34(%rbp),%eax
  cltq
  movsd  (%rdx,%rax,8),%xmm1
  mulsd  -0x18(%rbp),%xmm1
  mov    -0x38(%rbp),%eax
  movslq %eax,%rdx
  movslq %ebx,%rax
  imul   %rdx,%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x50(%rbp),%rax
  add    %rax,%rdx
  subsd  %xmm1,%xmm0
  mov    -0x34(%rbp),%eax
  cltq
  movsd  %xmm0,(%rdx,%rax,8)
  addl   $0x1,-0x34(%rbp)
L4:
  mov    -0x44(%rbp),%eax
  cmp    -0x34(%rbp),%eax
  jge    L15
  addl   $0x1,-0x38(%rbp)
L154:
  mov    -0x38(%rbp),%eax
  cmp    -0x44(%rbp),%eax
  jl     L79
  addl   $0x1,-0x3c(%rbp)
L172:
  mov    -0x44(%rbp),%eax
  sub    $0x1,%eax
  cmp    %eax,-0x3c(%rbp)
  jl     L110
  mov    -0x44(%rbp),%eax
  sub    $0x1,%eax
  movslq %eax,%rdx
  movslq %ebx,%rax
  imul   %rdx,%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x50(%rbp),%rax
  add    %rax,%rdx
  mov    -0x44(%rbp),%eax
  cltq
  movsd  (%rdx,%rax,8),%xmm0
  mov    -0x44(%rbp),%eax
  sub    $0x1,%eax
  movslq %eax,%rdx
  movslq %ebx,%rax
  imul   %rdx,%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x50(%rbp),%rax
  add    %rax,%rdx
  mov    -0x44(%rbp),%eax
  sub    $0x1,%eax
  cltq
  movsd  (%rdx,%rax,8),%xmm1
  mov    -0x44(%rbp),%eax
  cltq
  shl    $0x3,%rax
  lea    -0x8(%rax),%rdx
  mov    -0x58(%rbp),%rax
  add    %rdx,%rax
  divsd  %xmm1,%xmm0
  movsd  %xmm0,(%rax)
  mov    -0x44(%rbp),%eax
  sub    $0x2,%eax
  mov    %eax,-0x3c(%rbp)
  jmp    L98
L114:
  pxor   %xmm0,%xmm0
  movsd  %xmm0,-0x30(%rbp)
  mov    -0x3c(%rbp),%eax
  mov    %eax,-0x38(%rbp)
  jmp    L14
L175:
  mov    -0x38(%rbp),%eax
  cmp    -0x3c(%rbp),%eax
  je     L97
  mov    -0x3c(%rbp),%eax
  movslq %eax,%rdx
  movslq %ebx,%rax
  imul   %rdx,%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x50(%rbp),%rax
  add    %rax,%rdx
  mov    -0x38(%rbp),%eax
  cltq
  movsd  (%rdx,%rax,8),%xmm1
  mov    -0x38(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x58(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm0
  mulsd  %xmm1,%xmm0
  movsd  -0x30(%rbp),%xmm1
  addsd  %xmm1,%xmm0
  movsd  %xmm0,-0x30(%rbp)
  jmp    L177
L97:
  nop
L177:
  addl   $0x1,-0x38(%rbp)
L14:
  mov    -0x38(%rbp),%eax
  cmp    -0x44(%rbp),%eax
  jl     L175
  mov    -0x3c(%rbp),%eax
  movslq %eax,%rdx
  movslq %ebx,%rax
  imul   %rdx,%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x50(%rbp),%rax
  add    %rax,%rdx
  mov    -0x44(%rbp),%eax
  cltq
  movsd  (%rdx,%rax,8),%xmm0
  subsd  -0x30(%rbp),%xmm0
  mov    -0x3c(%rbp),%eax
  movslq %eax,%rdx
  movslq %ebx,%rax
  imul   %rdx,%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x50(%rbp),%rax
  add    %rax,%rdx
  mov    -0x3c(%rbp),%eax
  cltq
  movsd  (%rdx,%rax,8),%xmm1
  mov    -0x3c(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x58(%rbp),%rax
  add    %rdx,%rax
  divsd  %xmm1,%xmm0
  movsd  %xmm0,(%rax)
  subl   $0x1,-0x3c(%rbp)
L98:
  cmpl   $0x0,-0x3c(%rbp)
  jns    L114
  nop
  nop
  add    $0x50,%rsp
  pop    %rbx
  pop    %r12
  pop    %rbp
  ret
```

assistant: ```c
void Gauss_elimination(int n, double (*a)[n + 1], double *x) {
  int i, j, k;
  double temp, s, l;
  for (i = 0; i < n - 1; i++) {
    k = i;
    for (j = i + 1; j < n; j++) {
      if (fabs(a[j][i]) > fabs(a[k][i]))
        k = j;
    }
    if (k != i)
      for (j = i; j <= n; j++) {
        temp = a[i][j];
        a[i][j] = a[k][j];
        a[k][j] = temp;
      }
    for (j = i + 1; j < n; j++) {
      l = a[j][i] / a[i][i];
      for (k = 0; k < n + 1; k++)
        a[j][k] = a[j][k] - a[i][k] * l;
    }
  }
  x[n - 1] = a[n - 1][n] / a[n - 1][n - 1];
  for (i = n - 2; i >= 0; i--) {
    s = 0.0;
    for (j = i; j < n; j++) {
      if (j == i)
        continue;
      s += a[i][j] * x[j];
    }
    x[i] = (a[i][n] - s) / a[i][i];
  }
}
```