user: 提供的汇编代码用C语言表示会是什么样子:

```asm
<wkeep_2D_center>:
  endbr64
  push   %r15
  mov    %rdi,%r15
  mov    %esi,%edi
  push   %r14
  imul   %edx,%edi
  mov    %esi,%r14d
  push   %r13
  mov    %r9d,%r13d
  push   %r12
  push   %rbp
  shl    $0x3,%edi
  mov    %r8d,%ebp
  push   %rbx
  mov    %edx,%ebx
  sub    $0x48,%rsp
  mov    %rcx,0x38(%rsp)
  call   <malloc@plt>
  mov    %ebp,%edi
  mov    %ebp,0x24(%rsp)
  imul   %r13d,%edi
  mov    %rax,%r12
  shl    $0x3,%edi
  call   <malloc@plt>
  mov    %r14d,%r9d
  mov    %ebx,%r8d
  mov    %r14d,%edx
  mov    %ebx,%esi
  mov    %r12,%rcx
  mov    %r15,%rdi
  mov    %rax,%rbp
  call   <matrix_tran@plt>
  mov    0x24(%rsp),%esi
  mov    %ebx,%eax
  sub    %r13d,%eax
  sub    %esi,%r14d
  mov    %eax,%r8d
  mov    %r14d,%r11d
  shr    $0x1f,%r8d
  shr    $0x1f,%r11d
  add    %eax,%r8d
  add    %r14d,%r11d
  sar    %r8d
  sar    %r11d
  lea    (%rsi,%r11,1),%eax
  mov    %eax,0x18(%rsp)
  cmp    %eax,%r11d
  jge    L40
  lea    0x0(%r13,%r8,1),%r15d
  cmp    %r15d,%r8d
  jge    L40
  mov    %ebx,%esi
  movslq %ebx,%rax
  movslq %r8d,%rdi
  mov    %r13d,%r9d
  imul   %r11d,%esi
  shl    $0x3,%rax
  mov    %ebx,0x1c(%rsp)
  and    $0xfffffffe,%r9d
  mov    %rax,0x8(%rsp)
  mov    %rbp,%rdx
  add    %r9d,%r8d
  mov    %rdi,0x28(%rsp)
  movslq %esi,%rax
  add    %rdi,%rax
  lea    (%r12,%rax,8),%rcx
  movslq %r13d,%rax
  shl    $0x3,%rax
  mov    %rax,0x10(%rsp)
  mov    %r13d,%eax
  shr    %eax
  lea    -0x1(%rax),%r10d
  mov    %rdi,%rax
  xor    %edi,%edi
  neg    %rax
  add    $0x1,%r10
  shl    $0x3,%rax
  shl    $0x4,%r10
  mov    %rax,0x30(%rsp)
  lea    -0x1(%r13),%eax
  mov    %eax,0x20(%rsp)
L46:
  lea    0x8(%rcx),%rax
  cmp    %rax,%rdx
  je     L25
  xor    %eax,%eax
  cmpl   $0x2,0x20(%rsp)
  jbe    L25
  nopw   0x0(%rax,%rax,1)
L68:
  movupd (%rcx,%rax,1),%xmm1
  movups %xmm1,(%rdx,%rax,1)
  add    $0x10,%rax
  cmp    %r10,%rax
  jne    L68
  cmp    %r13d,%r9d
  je     L12
  lea    (%rsi,%r8,1),%eax
  cltq
  movsd  (%r12,%rax,8),%xmm0
  lea    (%rdi,%r9,1),%eax
  cltq
  movsd  %xmm0,0x0(%rbp,%rax,8)
L12:
  add    $0x1,%r11d
  add    0x8(%rsp),%rcx
  add    0x1c(%rsp),%esi
  add    %r13d,%edi
  add    0x10(%rsp),%rdx
  cmp    0x18(%rsp),%r11d
  jne    L46
L40:
  mov    0x24(%rsp),%esi
  mov    0x38(%rsp),%rcx
  mov    %r13d,%r9d
  mov    %r13d,%edx
  mov    %rbp,%rdi
  mov    %esi,%r8d
  call   <matrix_tran@plt>
  mov    %r12,%rdi
  call   <free@plt>
  add    $0x48,%rsp
  mov    %rbp,%rdi
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  jmp    1070 <free@plt>
  nopl   0x0(%rax,%rax,1)
L25:
  mov    0x30(%rsp),%rax
  lea    (%rcx,%rax,1),%r14
  lea    (%rdx,%rax,1),%rbx
  mov    0x28(%rsp),%rax
  nopw   0x0(%rax,%rax,1)
L38:
  movsd  (%r14,%rax,8),%xmm0
  movsd  %xmm0,(%rbx,%rax,8)
  add    $0x1,%rax
  cmp    %eax,%r15d
  jg     L38
  jmp    L12
```

assistant: ```c
void wkeep_2D_center(double *matrixIn, int matrixInRow, int matrixInCol, double *matrixOut, int matrixOutRow, int matrixOutCol) {
  int row, col, startRow, startCol;
  double *matrixInTemp, *matrixOutTemp;
  matrixInTemp = malloc(matrixInRow * matrixInCol * sizeof(double));
  matrixOutTemp = malloc(matrixOutRow * matrixOutCol * sizeof(double));
  matrix_tran(matrixIn, matrixInCol, matrixInRow, matrixInTemp, matrixInCol, matrixInRow);
  startRow = (matrixInRow - matrixOutRow) / 2;
  startCol = (matrixInCol - matrixOutCol) / 2;
  for (row = startRow; row < startRow + matrixOutRow; row++) {
    for (col = startCol; col < startCol + matrixOutCol; col++)
      matrixOutTemp[col - startCol + (row - startRow) * matrixOutCol] = matrixInTemp[col + row * matrixInCol];
  }
  matrix_tran(matrixOutTemp, matrixOutRow, matrixOutCol, matrixOut, matrixOutRow, matrixOutCol);
  free(matrixInTemp);
  free(matrixOutTemp);
  return;
}
```