user: 下面的汇编指令对应的C源代码是什么:

```asm
<split_matrix_fix_3f>:
  endbr64
  push   %r15
  mov    %esi,%r15d
  lea    (%rsi,%rsi,2),%esi
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  lea    (%rdi,%rdi,2),%ebx
  mov    %ebx,%eax
  sub    %esi,%eax
  mov    %edi,-0x40(%rsp)
  mov    %rdx,-0x38(%rsp)
  mov    %r8,-0x58(%rsp)
  mov    %r9,-0x20(%rsp)
  mov    %ebx,-0x30(%rsp)
  mov    %esi,-0x2c(%rsp)
  mov    %eax,-0x3c(%rsp)
  test   %r15d,%r15d
  jle    L97
  mov    %rdx,%r14
  lea    (%rdi,%rdi,8),%r9d
  lea    -0x1(%r15),%eax
  mov    %rcx,%rdx
  movslq %r9d,%r9
  lea    0x18(%r14),%rcx
  mov    %eax,-0x8(%rsp)
  lea    (%rax,%rax,2),%rax
  mov    %rcx,-0x10(%rsp)
  mov    %r14,%rdi
  lea    (%rcx,%rax,8),%r11
  movslq %ebx,%r14
  mov    %r9,-0x50(%rsp)
  movslq %esi,%rax
  xor    %r10d,%r10d
  lea    0x0(,%r9,8),%r13
  mov    %rax,-0x18(%rsp)
  lea    0x0(,%rax,8),%rbp
  lea    0x0(,%r14,8),%rbx
  mov    %rdi,%rax
  nopw   0x0(%rax,%rax,1)
L78:
  lea    (%rbx,%rax,1),%rsi
  lea    0x0(%rbp,%rdx,1),%rcx
  lea    (%rsi,%rbx,1),%r12
  lea    (%rcx,%rbp,1),%r9
  mov    %r9,%r8
  mov    %r12,%rdi
  nopw   0x0(%rax,%rax,1)
L71:
  movsd  (%rax),%xmm0
  add    $0x18,%rax
  add    $0x18,%rdx
  add    $0x18,%rsi
  add    $0x18,%rcx
  add    $0x18,%rdi
  add    $0x18,%r8
  movsd  %xmm0,-0x18(%rdx)
  movsd  -0x10(%rax),%xmm0
  movsd  %xmm0,-0x10(%rdx)
  movsd  -0x8(%rax),%xmm0
  movsd  %xmm0,-0x8(%rdx)
  movsd  -0x18(%rsi),%xmm0
  movsd  %xmm0,-0x18(%rcx)
  movsd  -0x10(%rsi),%xmm0
  movsd  %xmm0,-0x10(%rcx)
  movsd  -0x8(%rsi),%xmm0
  movsd  %xmm0,-0x8(%rcx)
  movsd  -0x18(%rdi),%xmm0
  movsd  %xmm0,-0x18(%r8)
  movsd  -0x10(%rdi),%xmm0
  movsd  %xmm0,-0x10(%r8)
  movsd  -0x8(%rdi),%xmm0
  movsd  %xmm0,-0x8(%r8)
  cmp    %rax,%r11
  jne    L71
  lea    0x1(%r10),%ecx
  lea    (%r12,%rbx,1),%rax
  add    %r13,%r11
  lea    (%r9,%rbp,1),%rdx
  cmp    %ecx,%r15d
  je     L82
  mov    %ecx,%r10d
  jmp    L78
L82:
  mov    -0x40(%rsp),%edi
  mov    -0x50(%rsp),%r9
  cmp    %r15d,%edi
  jle    L98
  mov    -0x3c(%rsp),%esi
  lea    (%rdi,%rdi,2),%r12d
  sub    %r15d,%edi
  mov    -0x58(%rsp),%rbx
  add    -0x38(%rsp),%rbp
  add    %r12d,%r12d
  mov    %r15d,-0x4(%rsp)
  xor    %r13d,%r13d
  lea    (%rsi,%rsi,2),%eax
  mov    %rbp,-0x48(%rsp)
  movslq %r12d,%r12
  xor    %ebp,%ebp
  cltq
  lea    0x0(,%rax,8),%rcx
  mov    %edi,%eax
  sub    $0x1,%eax
  mov    %rcx,%r15
  lea    (%rax,%rax,2),%rax
  lea    0x18(%rbx,%rax,8),%r11
  movslq %esi,%rax
  lea    0x0(,%rax,8),%rdi
  mov    %rax,-0x28(%rsp)
  shl    $0x4,%rax
  mov    %rdi,-0x50(%rsp)
  mov    %rax,-0x58(%rsp)
L23:
  mov    -0x50(%rsp),%rdi
  mov    -0x48(%rsp),%rax
  mov    %r14,%r8
  mov    %rbx,%rdx
  sub    %rbp,%r8
  lea    (%rdi,%rbx,1),%rsi
  mov    -0x58(%rsp),%rdi
  lea    (%rax,%rbp,8),%rax
  lea    (%rdi,%rbx,1),%rcx
  mov    %r12,%rdi
  sub    %rbp,%rdi
  nopw   0x0(%rax,%rax,1)
L50:
  movsd  (%rax),%xmm0
  add    $0x18,%rdx
  add    $0x18,%rsi
  add    $0x18,%rcx
  movsd  %xmm0,-0x18(%rdx)
  movsd  0x8(%rax),%xmm0
  movsd  %xmm0,-0x10(%rdx)
  movsd  0x10(%rax),%xmm0
  movsd  %xmm0,-0x8(%rdx)
  movsd  (%rax,%r8,8),%xmm0
  movsd  %xmm0,-0x18(%rsi)
  movsd  0x8(%rax,%r8,8),%xmm0
  movsd  %xmm0,-0x10(%rsi)
  movsd  0x10(%rax,%r8,8),%xmm0
  movsd  %xmm0,-0x8(%rsi)
  movsd  (%rax,%rdi,8),%xmm0
  movsd  %xmm0,-0x18(%rcx)
  movsd  0x8(%rax,%rdi,8),%xmm0
  movsd  %xmm0,-0x10(%rcx)
  movsd  0x10(%rax,%rdi,8),%xmm0
  add    $0x18,%rax
  movsd  %xmm0,-0x8(%rcx)
  cmp    %rdx,%r11
  jne    L50
  lea    0x1(%r13),%eax
  add    %r15,%rbx
  add    %r9,%r14
  add    %r9,%rbp
  add    %r9,%r12
  add    %r15,%r11
  cmp    %r10d,%r13d
  je     L87
  mov    %eax,%r13d
  jmp    L23
L87:
  mov    -0x2c(%rsp),%r14d
  mov    -0x30(%rsp),%ebx
  mov    -0x4(%rsp),%r15d
  mov    -0x38(%rsp),%rsi
  lea    0x1(%r14),%eax
  mov    %ebx,%ecx
  lea    0x2(%r14),%r13d
  mov    -0x40(%rsp),%edi
  mov    %eax,-0x58(%rsp)
  imul   %ebx,%eax
  mov    -0x18(%rsp),%r11
  imul   %r15d,%ecx
  mov    %r13d,-0x50(%rsp)
  lea    (%rdi,%rdi,8),%r12d
  mov    -0x20(%rsp),%rdx
  imul   %ebx,%r13d
  movslq %r12d,%r12
  mov    %r15d,-0x48(%rsp)
  mov    %r15d,%ebx
  shl    $0x3,%r12
  cltq
  shl    $0x3,%r11
  lea    (%rsi,%rax,8),%r10
  mov    -0x8(%rsp),%esi
  lea    (%rcx,%rcx,2),%ecx
  movslq %ecx,%rcx
  movslq %r13d,%r13
  lea    (%rsi,%rsi,2),%rsi
  sub    %rax,%r13
  mov    %r15d,%eax
  mov    %edi,%r15d
  add    %rsi,%rcx
  mov    -0x10(%rsp),%rsi
  shl    $0x3,%r13
  lea    (%rsi,%rcx,8),%r9
  lea    0x0(,%rax,4),%rcx
  sub    %rcx,%rax
  lea    0x0(,%rax,8),%r14
L132:
  lea    (%r11,%rdx,1),%rcx
  lea    (%r14,%r9,1),%rax
  mov    %r10,%rsi
  lea    (%rcx,%r11,1),%rbp
  lea    0x0(%r13,%r10,1),%r8
  mov    %rbp,%rdi
  nopl   (%rax)
L99:
  movsd  (%rax),%xmm0
  add    $0x18,%rax
  add    $0x18,%rdx
  add    $0x18,%rsi
  add    $0x18,%rcx
  add    $0x18,%r8
  add    $0x18,%rdi
  movsd  %xmm0,-0x18(%rdx)
  movsd  -0x10(%rax),%xmm0
  movsd  %xmm0,-0x10(%rdx)
  movsd  -0x8(%rax),%xmm0
  movsd  %xmm0,-0x8(%rdx)
  movsd  -0x18(%rsi),%xmm0
  movsd  %xmm0,-0x18(%rcx)
  movsd  -0x10(%rsi),%xmm0
  movsd  %xmm0,-0x10(%rcx)
  movsd  -0x8(%rsi),%xmm0
  movsd  %xmm0,-0x8(%rcx)
  movsd  -0x18(%r8),%xmm0
  movsd  %xmm0,-0x18(%rdi)
  movsd  -0x10(%r8),%xmm0
  movsd  %xmm0,-0x10(%rdi)
  movsd  -0x8(%r8),%xmm0
  movsd  %xmm0,-0x8(%rdi)
  cmp    %r9,%rax
  jne    L99
  add    $0x1,%ebx
  lea    0x0(%rbp,%r11,1),%rdx
  add    %r12,%r10
  add    %r12,%r9
  cmp    %ebx,%r15d
  jne    L132
  mov    -0x48(%rsp),%r15d
L46:
  mov    -0x30(%rsp),%edi
  mov    -0x3c(%rsp),%eax
  mov    -0x40(%rsp),%esi
  mov    -0x58(%rsp),%ebp
  lea    (%rax,%rax,2),%r13d
  mov    %edi,%eax
  mov    -0x50(%rsp),%ebx
  mov    0x38(%rsp),%r11
  imul   %r15d,%eax
  movslq %r13d,%r13
  lea    (%rsi,%rsi,8),%r12d
  imul   %edi,%ebp
  shl    $0x3,%r13
  movslq %r12d,%r12
  imul   %edi,%ebx
  mov    -0x38(%rsp),%rdi
  lea    (%rax,%rax,2),%r10d
  mov    %esi,%eax
  sub    %r15d,%eax
  movslq %ebp,%rbp
  movslq %r10d,%r10
  sub    $0x1,%eax
  movslq %ebx,%rbx
  lea    (%rax,%rax,2),%rax
  lea    0x18(%r11,%rax,8),%r9
  movslq %r15d,%rax
  lea    (%rax,%rax,2),%rax
  lea    (%rdi,%rax,8),%rax
  mov    %rax,-0x50(%rsp)
  mov    -0x28(%rsp),%rax
  lea    0x0(,%rax,8),%r14
  shl    $0x4,%rax
  mov    %rax,-0x58(%rsp)
  nopl   (%rax)
L62:
  mov    -0x58(%rsp),%rdi
  mov    -0x50(%rsp),%rax
  mov    %rbp,%r8
  mov    %r11,%rdx
  lea    (%r14,%r11,1),%rsi
  sub    %r10,%r8
  lea    (%rdi,%r11,1),%rcx
  mov    %rbx,%rdi
  lea    (%rax,%r10,8),%rax
  sub    %r10,%rdi
  nopl   (%rax)
L122:
  movsd  (%rax),%xmm0
  add    $0x18,%rdx
  add    $0x18,%rsi
  add    $0x18,%rcx
  movsd  %xmm0,-0x18(%rdx)
  movsd  0x8(%rax),%xmm0
  movsd  %xmm0,-0x10(%rdx)
  movsd  0x10(%rax),%xmm0
  movsd  %xmm0,-0x8(%rdx)
  movsd  (%rax,%r8,8),%xmm0
  movsd  %xmm0,-0x18(%rsi)
  movsd  0x8(%rax,%r8,8),%xmm0
  movsd  %xmm0,-0x10(%rsi)
  movsd  0x10(%rax,%r8,8),%xmm0
  movsd  %xmm0,-0x8(%rsi)
  movsd  (%rax,%rdi,8),%xmm0
  movsd  %xmm0,-0x18(%rcx)
  movsd  0x8(%rax,%rdi,8),%xmm0
  movsd  %xmm0,-0x10(%rcx)
  movsd  0x10(%rax,%rdi,8),%xmm0
  add    $0x18,%rax
  movsd  %xmm0,-0x8(%rcx)
  cmp    %rdx,%r9
  jne    L122
  add    $0x1,%r15d
  add    %r13,%r11
  add    %r12,%rbp
  add    %r12,%r10
  add    %r12,%rbx
  add    %r13,%r9
  cmp    %r15d,-0x40(%rsp)
  jne    L62
L98:
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L97:
  movslq -0x3c(%rsp),%rax
  mov    %rax,-0x28(%rsp)
  mov    -0x2c(%rsp),%eax
  lea    0x1(%rax),%ebx
  add    $0x2,%eax
  mov    %ebx,-0x58(%rsp)
  mov    %eax,-0x50(%rsp)
  cmp    %r15d,-0x40(%rsp)
  jg     L46
  jmp    L98
```

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];
        }
      }
    }
  }
}
```