user: Demonstrate the C code that generates the assembly output below:

```asm
<split_matrix_fix_3f>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  mov    %edi,-0x34(%rbp)
  mov    %esi,-0x38(%rbp)
  mov    %rdx,-0x40(%rbp)
  mov    %rcx,-0x48(%rbp)
  mov    %r8,-0x50(%rbp)
  mov    %r9,-0x58(%rbp)
  mov    -0x34(%rbp),%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  mov    %eax,-0x14(%rbp)
  mov    -0x38(%rbp),%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  mov    %eax,-0x10(%rbp)
  mov    -0x14(%rbp),%eax
  sub    -0x10(%rbp),%eax
  mov    %eax,-0xc(%rbp)
  movl   $0x0,-0x24(%rbp)
  jmp    L68
L226:
  mov    -0x24(%rbp),%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  mov    %eax,-0x8(%rbp)
  movl   $0x0,-0x20(%rbp)
  jmp    L133
L197:
  mov    -0x20(%rbp),%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  mov    %eax,-0x4(%rbp)
  movl   $0x0,-0x1c(%rbp)
  jmp    L55
L143:
  movl   $0x0,-0x18(%rbp)
  jmp    L57
L178:
  mov    -0x8(%rbp),%edx
  mov    -0x1c(%rbp),%eax
  add    %edx,%eax
  imul   -0x14(%rbp),%eax
  mov    %eax,%edx
  mov    -0x4(%rbp),%eax
  add    %eax,%edx
  mov    -0x18(%rbp),%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x40(%rbp),%rax
  add    %rax,%rdx
  mov    -0x8(%rbp),%ecx
  mov    -0x1c(%rbp),%eax
  add    %ecx,%eax
  imul   -0x10(%rbp),%eax
  mov    %eax,%ecx
  mov    -0x4(%rbp),%eax
  add    %eax,%ecx
  mov    -0x18(%rbp),%eax
  add    %ecx,%eax
  cltq
  lea    0x0(,%rax,8),%rcx
  mov    -0x48(%rbp),%rax
  add    %rcx,%rax
  movsd  (%rdx),%xmm0
  movsd  %xmm0,(%rax)
  addl   $0x1,-0x18(%rbp)
L57:
  cmpl   $0x2,-0x18(%rbp)
  jle    L178
  addl   $0x1,-0x1c(%rbp)
L55:
  cmpl   $0x2,-0x1c(%rbp)
  jle    L143
  addl   $0x1,-0x20(%rbp)
L133:
  mov    -0x20(%rbp),%eax
  cmp    -0x38(%rbp),%eax
  jl     L197
  addl   $0x1,-0x24(%rbp)
L68:
  mov    -0x24(%rbp),%eax
  cmp    -0x38(%rbp),%eax
  jl     L226
  movl   $0x0,-0x24(%rbp)
  jmp    L52
L286:
  mov    -0x24(%rbp),%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  mov    %eax,-0x8(%rbp)
  mov    -0x38(%rbp),%eax
  mov    %eax,-0x20(%rbp)
  jmp    L268
L64:
  mov    -0x20(%rbp),%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  mov    %eax,-0x4(%rbp)
  movl   $0x0,-0x1c(%rbp)
  jmp    L202
L283:
  movl   $0x0,-0x18(%rbp)
  jmp    L142
L38:
  mov    -0x8(%rbp),%edx
  mov    -0x1c(%rbp),%eax
  add    %edx,%eax
  imul   -0x14(%rbp),%eax
  mov    %eax,%edx
  mov    -0x4(%rbp),%eax
  add    %eax,%edx
  mov    -0x18(%rbp),%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x40(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  mov    -0x8(%rbp),%edx
  mov    -0x1c(%rbp),%eax
  add    %edx,%eax
  imul   -0xc(%rbp),%eax
  mov    %eax,%esi
  mov    -0x20(%rbp),%eax
  sub    -0x38(%rbp),%eax
  mov    %eax,%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  lea    (%rsi,%rax,1),%edx
  mov    -0x18(%rbp),%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x50(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rcx),%xmm0
  movsd  %xmm0,(%rax)
  addl   $0x1,-0x18(%rbp)
L142:
  cmpl   $0x2,-0x18(%rbp)
  jle    L38
  addl   $0x1,-0x1c(%rbp)
L202:
  cmpl   $0x2,-0x1c(%rbp)
  jle    L283
  addl   $0x1,-0x20(%rbp)
L268:
  mov    -0x20(%rbp),%eax
  cmp    -0x34(%rbp),%eax
  jl     L64
  addl   $0x1,-0x24(%rbp)
L52:
  mov    -0x24(%rbp),%eax
  cmp    -0x38(%rbp),%eax
  jl     L286
  mov    -0x38(%rbp),%eax
  mov    %eax,-0x24(%rbp)
  jmp    L302
L102:
  mov    -0x24(%rbp),%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  mov    %eax,-0x8(%rbp)
  movl   $0x0,-0x20(%rbp)
  jmp    L232
L233:
  mov    -0x20(%rbp),%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  mov    %eax,-0x4(%rbp)
  movl   $0x0,-0x1c(%rbp)
  jmp    L81
L176:
  movl   $0x0,-0x18(%rbp)
  jmp    L78
L241:
  mov    -0x8(%rbp),%edx
  mov    -0x1c(%rbp),%eax
  add    %edx,%eax
  imul   -0x14(%rbp),%eax
  mov    %eax,%edx
  mov    -0x4(%rbp),%eax
  add    %eax,%edx
  mov    -0x18(%rbp),%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x40(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  mov    -0x24(%rbp),%eax
  sub    -0x38(%rbp),%eax
  mov    %eax,%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %eax,%edx
  mov    -0x1c(%rbp),%eax
  add    %edx,%eax
  imul   -0x10(%rbp),%eax
  mov    %eax,%edx
  mov    -0x4(%rbp),%eax
  add    %eax,%edx
  mov    -0x18(%rbp),%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x58(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rcx),%xmm0
  movsd  %xmm0,(%rax)
  addl   $0x1,-0x18(%rbp)
L78:
  cmpl   $0x2,-0x18(%rbp)
  jle    L241
  addl   $0x1,-0x1c(%rbp)
L81:
  cmpl   $0x2,-0x1c(%rbp)
  jle    L176
  addl   $0x1,-0x20(%rbp)
L232:
  mov    -0x20(%rbp),%eax
  cmp    -0x38(%rbp),%eax
  jl     L233
  addl   $0x1,-0x24(%rbp)
L302:
  mov    -0x24(%rbp),%eax
  cmp    -0x34(%rbp),%eax
  jl     L102
  mov    -0x38(%rbp),%eax
  mov    %eax,-0x24(%rbp)
  jmp    L209
L292:
  mov    -0x24(%rbp),%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  mov    %eax,-0x8(%rbp)
  mov    -0x38(%rbp),%eax
  mov    %eax,-0x20(%rbp)
  jmp    L50
L285:
  mov    -0x20(%rbp),%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  mov    %eax,-0x4(%rbp)
  movl   $0x0,-0x1c(%rbp)
  jmp    L80
L182:
  movl   $0x0,-0x18(%rbp)
  jmp    L158
L150:
  mov    -0x8(%rbp),%edx
  mov    -0x1c(%rbp),%eax
  add    %edx,%eax
  imul   -0x14(%rbp),%eax
  mov    %eax,%edx
  mov    -0x4(%rbp),%eax
  add    %eax,%edx
  mov    -0x18(%rbp),%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x40(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  mov    -0x24(%rbp),%eax
  sub    -0x38(%rbp),%eax
  mov    %eax,%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %eax,%edx
  mov    -0x1c(%rbp),%eax
  add    %edx,%eax
  imul   -0xc(%rbp),%eax
  mov    %eax,%esi
  mov    -0x20(%rbp),%eax
  sub    -0x38(%rbp),%eax
  mov    %eax,%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  lea    (%rsi,%rax,1),%edx
  mov    -0x18(%rbp),%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    0x10(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rcx),%xmm0
  movsd  %xmm0,(%rax)
  addl   $0x1,-0x18(%rbp)
L158:
  cmpl   $0x2,-0x18(%rbp)
  jle    L150
  addl   $0x1,-0x1c(%rbp)
L80:
  cmpl   $0x2,-0x1c(%rbp)
  jle    L182
  addl   $0x1,-0x20(%rbp)
L50:
  mov    -0x20(%rbp),%eax
  cmp    -0x34(%rbp),%eax
  jl     L285
  addl   $0x1,-0x24(%rbp)
L209:
  mov    -0x24(%rbp),%eax
  cmp    -0x34(%rbp),%eax
  jl     L292
  nop
  nop
  pop    %rbp
  ret
```

assistant: ```c
void split_matrix_fix_3f(int np, int nm, const double *mat, double *mat_ll, double *mat_lh, double *mat_hl, double *mat_hh) {
  int i, j;
  int ii, jj;
  int i3, j3;
  int n3;
  int nl, nh;
  n3 = np * 3;
  nl = nm * 3;
  nh = n3 - nl;
  for (i = 0; i < nm; ++i) {
    i3 = i * 3;
    for (j = 0; j < nm; ++j) {
      j3 = j * 3;
      for (ii = 0; ii < 3; ++ii) {
        for (jj = 0; jj < 3; ++jj) {
          mat_ll[(i3 + ii) * nl + j3 + jj] = mat[(i3 + ii) * n3 + j3 + jj];
        }
      }
    }
  }
  for (i = 0; i < nm; ++i) {
    i3 = i * 3;
    for (j = nm; j < np; ++j) {
      j3 = j * 3;
      for (ii = 0; ii < 3; ++ii) {
        for (jj = 0; jj < 3; ++jj) {
          mat_lh[(i3 + ii) * nh + (j - nm) * 3 + jj] = mat[(i3 + ii) * n3 + j3 + jj];
        }
      }
    }
  }
  for (i = nm; i < np; ++i) {
    i3 = i * 3;
    for (j = 0; j < nm; ++j) {
      j3 = j * 3;
      for (ii = 0; ii < 3; ++ii) {
        for (jj = 0; jj < 3; ++jj) {
          mat_hl[((i - nm) * 3 + ii) * nl + j3 + jj] = mat[(i3 + ii) * n3 + j3 + jj];
        }
      }
    }
  }
  for (i = nm; i < np; ++i) {
    i3 = i * 3;
    for (j = nm; j < np; ++j) {
      j3 = j * 3;
      for (ii = 0; ii < 3; ++ii) {
        for (jj = 0; jj < 3; ++jj) {
          mat_hh[((i - nm) * 3 + ii) * nh + (j - nm) * 3 + jj] = mat[(i3 + ii) * n3 + j3 + jj];
        }
      }
    }
  }
}
```