user: What would the C source look like for the assembly code provided here?

```asm
<dgemm2>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  mov    %rdi,-0x28(%rbp)
  mov    %rsi,-0x30(%rbp)
  mov    %rdx,-0x38(%rbp)
  mov    %ecx,-0x3c(%rbp)
  mov    %r8d,-0x40(%rbp)
  movl   $0x0,-0x18(%rbp)
  jmp    L63
L64:
  movl   $0x0,-0x14(%rbp)
  jmp    L62
L65:
  movl   $0x0,-0x10(%rbp)
  jmp    L107
L78:
  mov    -0x18(%rbp),%eax
  mov    %eax,-0xc(%rbp)
  jmp    L41
L7:
  mov    -0x14(%rbp),%eax
  mov    %eax,-0x8(%rbp)
  jmp    L92
L79:
  mov    -0xc(%rbp),%eax
  imul   -0x3c(%rbp),%eax
  mov    %eax,%edx
  mov    -0x8(%rbp),%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm2
  movapd %xmm2,%xmm10
  mov    -0xc(%rbp),%eax
  add    $0x1,%eax
  imul   -0x3c(%rbp),%eax
  mov    %eax,%edx
  mov    -0x8(%rbp),%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm3
  movapd %xmm3,%xmm11
  mov    -0xc(%rbp),%eax
  imul   -0x3c(%rbp),%eax
  mov    %eax,%edx
  mov    -0x8(%rbp),%eax
  add    $0x1,%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm1
  movapd %xmm1,%xmm12
  mov    -0xc(%rbp),%eax
  add    $0x1,%eax
  imul   -0x3c(%rbp),%eax
  mov    %eax,%edx
  mov    -0x8(%rbp),%eax
  add    $0x1,%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm2
  movapd %xmm2,%xmm13
  mov    -0x10(%rbp),%eax
  mov    %eax,-0x4(%rbp)
  jmp    L66
L118:
  mov    -0xc(%rbp),%eax
  imul   -0x3c(%rbp),%eax
  mov    %eax,%edx
  mov    -0x4(%rbp),%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm2
  mov    -0xc(%rbp),%eax
  imul   -0x3c(%rbp),%eax
  mov    %eax,%edx
  mov    -0x4(%rbp),%eax
  add    $0x1,%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm3
  mov    -0xc(%rbp),%eax
  add    $0x1,%eax
  imul   -0x3c(%rbp),%eax
  mov    %eax,%edx
  mov    -0x4(%rbp),%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm4
  mov    -0xc(%rbp),%eax
  add    $0x1,%eax
  imul   -0x3c(%rbp),%eax
  mov    %eax,%edx
  mov    -0x4(%rbp),%eax
  add    $0x1,%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm5
  mov    -0x4(%rbp),%eax
  imul   -0x3c(%rbp),%eax
  mov    %eax,%edx
  mov    -0x8(%rbp),%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x30(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm6
  mov    -0x4(%rbp),%eax
  add    $0x1,%eax
  imul   -0x3c(%rbp),%eax
  mov    %eax,%edx
  mov    -0x8(%rbp),%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x30(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm7
  mov    -0x4(%rbp),%eax
  imul   -0x3c(%rbp),%eax
  mov    %eax,%edx
  mov    -0x8(%rbp),%eax
  add    $0x1,%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x30(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm8
  mov    -0x4(%rbp),%eax
  add    $0x1,%eax
  imul   -0x3c(%rbp),%eax
  mov    %eax,%edx
  mov    -0x8(%rbp),%eax
  add    $0x1,%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x30(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm9
  movapd %xmm2,%xmm1
  mulsd  %xmm6,%xmm1
  movapd %xmm3,%xmm0
  mulsd  %xmm7,%xmm0
  addsd  %xmm1,%xmm0
  movapd %xmm10,%xmm1
  addsd  %xmm1,%xmm0
  movapd %xmm0,%xmm10
  mulsd  %xmm4,%xmm6
  movapd %xmm6,%xmm1
  mulsd  %xmm5,%xmm7
  movapd %xmm7,%xmm0
  addsd  %xmm1,%xmm0
  movapd %xmm11,%xmm6
  addsd  %xmm6,%xmm0
  movapd %xmm0,%xmm11
  mulsd  %xmm8,%xmm2
  movapd %xmm2,%xmm1
  mulsd  %xmm9,%xmm3
  movapd %xmm3,%xmm0
  addsd  %xmm1,%xmm0
  movapd %xmm12,%xmm3
  addsd  %xmm3,%xmm0
  movapd %xmm0,%xmm12
  mulsd  %xmm8,%xmm4
  movapd %xmm4,%xmm1
  mulsd  %xmm9,%xmm5
  movapd %xmm5,%xmm0
  addsd  %xmm1,%xmm0
  movapd %xmm13,%xmm4
  addsd  %xmm4,%xmm0
  movapd %xmm0,%xmm13
  addl   $0x2,-0x4(%rbp)
L66:
  mov    -0x10(%rbp),%edx
  mov    -0x40(%rbp),%eax
  add    %edx,%eax
  cmp    %eax,-0x4(%rbp)
  jl     L118
  mov    -0xc(%rbp),%eax
  imul   -0x3c(%rbp),%eax
  mov    %eax,%edx
  mov    -0x8(%rbp),%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  movapd %xmm10,%xmm5
  movsd  %xmm5,(%rax)
  mov    -0xc(%rbp),%eax
  add    $0x1,%eax
  imul   -0x3c(%rbp),%eax
  mov    %eax,%edx
  mov    -0x8(%rbp),%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  movapd %xmm11,%xmm7
  movsd  %xmm7,(%rax)
  mov    -0xc(%rbp),%eax
  imul   -0x3c(%rbp),%eax
  mov    %eax,%edx
  mov    -0x8(%rbp),%eax
  add    $0x1,%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  movapd %xmm12,%xmm2
  movsd  %xmm2,(%rax)
  mov    -0xc(%rbp),%eax
  add    $0x1,%eax
  imul   -0x3c(%rbp),%eax
  mov    %eax,%edx
  mov    -0x8(%rbp),%eax
  add    $0x1,%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  movapd %xmm13,%xmm3
  movsd  %xmm3,(%rax)
  addl   $0x2,-0x8(%rbp)
L92:
  mov    -0x14(%rbp),%edx
  mov    -0x40(%rbp),%eax
  add    %edx,%eax
  cmp    %eax,-0x8(%rbp)
  jl     L79
  addl   $0x2,-0xc(%rbp)
L41:
  mov    -0x18(%rbp),%edx
  mov    -0x40(%rbp),%eax
  add    %edx,%eax
  cmp    %eax,-0xc(%rbp)
  jl     L7
  mov    -0x40(%rbp),%eax
  add    %eax,-0x10(%rbp)
L107:
  mov    -0x10(%rbp),%eax
  cmp    -0x3c(%rbp),%eax
  jl     L78
  mov    -0x40(%rbp),%eax
  add    %eax,-0x14(%rbp)
L62:
  mov    -0x14(%rbp),%eax
  cmp    -0x3c(%rbp),%eax
  jl     L65
  mov    -0x40(%rbp),%eax
  add    %eax,-0x18(%rbp)
L63:
  mov    -0x18(%rbp),%eax
  cmp    -0x3c(%rbp),%eax
  jl     L64
  nop
  nop
  pop    %rbp
  ret
```

assistant: ```c
void dgemm2(double *a, double *b, double *c, int n, int BLOCK_SIZE) {
  int i, j, k;
  int ii, jj, kk;
  for (i = 0; i < n; i += BLOCK_SIZE) {
    for (j = 0; j < n; j += BLOCK_SIZE) {
      for (k = 0; k < n; k += BLOCK_SIZE) {
        for (ii = i; ii < i + BLOCK_SIZE; ii += 2) {
          for (jj = j; jj < j + BLOCK_SIZE; jj += 2) {
            register double cc0 = c[ii * n + jj];
            register double cc1 = c[(ii + 1) * n + jj];
            register double cc2 = c[ii * n + (jj + 1)];
            register double cc3 = c[(ii + 1) * n + (jj + 1)];
            for (kk = k; kk < k + BLOCK_SIZE; kk += 2) {
              register double aa0 = a[ii * n + kk];
              register double aa1 = a[ii * n + (kk + 1)];
              register double aa2 = a[(ii + 1) * n + kk];
              register double aa3 = a[(ii + 1) * n + (kk + 1)];
              register double bb0 = b[kk * n + jj];
              register double bb1 = b[(kk + 1) * n + jj];
              register double bb2 = b[kk * n + (jj + 1)];
              register double bb3 = b[(kk + 1) * n + (jj + 1)];
              cc0 += aa0 * bb0 + aa1 * bb1;
              cc1 += aa2 * bb0 + aa3 * bb1;
              cc2 += aa0 * bb2 + aa1 * bb3;
              cc3 += aa2 * bb2 + aa3 * bb3;
            }
            c[ii * n + jj] = cc0;
            c[(ii + 1) * n + jj] = cc1;
            c[ii * n + (jj + 1)] = cc2;
            c[(ii + 1) * n + (jj + 1)] = cc3;
          }
        }
      }
    }
  }
}
```