user: 请显示与下面列出的汇编代码相匹配的C语言实现:

```asm
<fsub>:
  endbr64
  push   %r15
  push   %r14
  mov    %esi,%r14d
  push   %r13
  lea    0x0(,%rsi,8),%r13d
  push   %r12
  movslq %esi,%r12
  push   %rbp
  mov    %r8,%rbp
  push   %rbx
  mov    %rcx,%rbx
  sub    $0x88,%rsp
  mov    %rdi,0x70(%rsp)
  mov    %r13d,%edi
  mov    %edx,0x54(%rsp)
  mov    %esi,0x50(%rsp)
  call   <malloc@plt>
  mov    %r13d,%edi
  mov    %rax,0x10(%rsp)
  mov    %rax,%r15
  call   <malloc@plt>
  mov    0x54(%rsp),%edx
  mov    %rax,0x38(%rsp)
  test   %edx,%edx
  jle    L21
  mov    %r15,%rdx
  mov    %rax,%rcx
  sub    %rax,%rbx
  sub    %r15,%rbp
  neg    %rdx
  lea    -0x1(%r14),%eax
  lea    0x0(,%r12,8),%rdi
  mov    %rbx,0x48(%rsp)
  mov    %rdx,0x68(%rsp)
  mov    %r15,%rdx
  mov    %rax,0x28(%rsp)
  lea    0x8(,%rax,8),%rax
  sub    %rcx,%rdx
  lea    (%rax,%rcx,1),%rsi
  mov    %rdi,0x18(%rsp)
  add    %r15,%rax
  add    $0x8,%rdi
  mov    %rsi,0x60(%rsp)
  mov    %rdi,0x20(%rsp)
  mov    %rax,0x58(%rsp)
  movl   $0x0,0x34(%rsp)
  mov    %rdx,0x78(%rsp)
  mov    %rbp,0x40(%rsp)
  lea    D6(%rip),%rbp
  nop
L43:
  mov    0x50(%rsp),%eax
  test   %eax,%eax
  jle    L75
  mov    0x38(%rsp),%rax
  mov    0x60(%rsp),%rdx
  mov    0x48(%rsp),%rcx
  mov    0x78(%rsp),%rsi
L102:
  movsd  (%rcx,%rax,1),%xmm0
  movsd  %xmm0,(%rax)
  movq   $0x0,(%rsi,%rax,1)
  add    $0x8,%rax
  cmp    %rdx,%rax
  jne    L102
  mov    0x38(%rsp),%r13
  mov    0x50(%rsp),%esi
  mov    $0x1,%edx
  xor    %r12d,%r12d
  mov    %r13,%rdi
  call   <mdisplay@plt>
  mov    0x70(%rsp),%rax
  mov    %rax,0x8(%rsp)
  add    0x68(%rsp),%rax
  mov    %rax,%r15
  test   %r12,%r12
  je     L30
  xchg   %ax,%ax
L18:
  mov    0x10(%rsp),%r14
  lea    -0x1(%r12),%eax
  pxor   %xmm1,%xmm1
  lea    0x8(%r14,%rax,8),%rbx
  nopl   0x0(%rax,%rax,1)
L17:
  movsd  (%r15,%r14,1),%xmm0
  mulsd  (%r14),%xmm0
  mov    %rbp,%rdi
  add    $0x8,%r14
  addsd  %xmm0,%xmm1
  movapd %xmm1,%xmm0
  movsd  %xmm1,(%rsp)
  call   <printf@plt>
  cmp    %r14,%rbx
  movsd  (%rsp),%xmm1
  jne    L17
L79:
  movsd  0x0(%r13),%xmm0
  mov    0x8(%rsp),%rsi
  add    $0x8,%r13
  mov    0x20(%rsp),%rcx
  mov    0x10(%rsp),%rax
  subsd  %xmm1,%xmm0
  divsd  (%rsi),%xmm0
  add    0x18(%rsp),%r15
  add    %rcx,%rsi
  movsd  %xmm0,(%rax,%r12,8)
  lea    0x1(%r12),%rax
  mov    %rsi,0x8(%rsp)
  cmp    0x28(%rsp),%r12
  je     L20
  mov    %rax,%r12
  test   %r12,%r12
  jne    L18
L30:
  pxor   %xmm1,%xmm1
  jmp    L79
  nopl   0x0(%rax,%rax,1)
L20:
  mov    0x10(%rsp),%rax
  mov    0x58(%rsp),%rdx
  mov    0x40(%rsp),%rcx
  nop
L44:
  movsd  (%rax),%xmm0
  movsd  %xmm0,(%rcx,%rax,1)
  add    $0x8,%rax
  cmp    %rax,%rdx
  jne    L44
L37:
  mov    0x18(%rsp),%rdx
  addl   $0x1,0x34(%rsp)
  add    %rdx,0x40(%rsp)
  mov    0x34(%rsp),%eax
  add    %rdx,0x48(%rsp)
  cmp    %eax,0x54(%rsp)
  jne    L43
L21:
  mov    0x10(%rsp),%rdi
  call   <free@plt>
  mov    0x38(%rsp),%rdi
  add    $0x88,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  jmp    1080 <free@plt>
L75:
  mov    0x50(%rsp),%esi
  mov    0x38(%rsp),%rdi
  mov    $0x1,%edx
  call   <mdisplay@plt>
  jmp    L37
```

tool_calls: name: extract_symbolic_data
arguments: label: D6
datatype: string

tool: D6: sum %lf 


assistant: ```c
void fsub(double *A, int N, int M, double *bb, double *xx) {
  int i, j, t, k, u;
  double sum;
  double *x, *b;
  x = (double *)malloc(sizeof(double) * N);
  b = (double *)malloc(sizeof(double) * N);
  for (k = 0; k < M; ++k) {
    u = k * N;
    for (i = 0; i < N; ++i) {
      b[i] = bb[u + i];
      x[i] = 0.;
    }
    mdisplay(b, N, 1);
    for (i = 0; i < N; ++i) {
      t = i * N;
      sum = 0;
      for (j = 0; j < i; ++j) {
        sum += A[t + j] * x[j];
        printf("sum %lf \n", sum);
      }
      x[i] = (b[i] - sum) / A[t + i];
    }
    for (i = 0; i < N; ++i) {
      xx[u + i] = x[i];
    }
  }
  free(x);
  free(b);
}
```