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

```asm
<dlsolve>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  mov    %edi,-0x8(%rsp)
  mov    %esi,-0x44(%rsp)
  mov    %rdx,-0x18(%rsp)
  mov    %rcx,-0x10(%rsp)
  cmp    $0x7,%esi
  jle    L88
  mov    %rdx,%rbx
  lea    0x0(,%rdi,8),%eax
  mov    %rcx,%rdx
  movslq %edi,%rcx
  add    $0x1,%rcx
  cltq
  mov    %esi,%r11d
  lea    0x0(,%rcx,8),%r12
  lea    0x40(,%rax,8),%r13
  lea    (%rcx,%rcx,2),%rax
  lea    0x8(%r12),%r15
  lea    0x0(,%rax,8),%r10
  lea    -0x8(%r11),%r14d
  shl    $0x4,%rax
  lea    (%r15,%r10,1),%r9
  mov    %r10,-0x20(%rsp)
  mov    %r14d,%r10d
  add    %r15,%rax
  and    $0xfffffff8,%r10d
  mov    %r14d,-0x4(%rsp)
  lea    (%rcx,%rcx,4),%r8
  add    %rbx,%r9
  lea    0x10(%r10),%r14d
  mov    %rax,-0x30(%rsp)
  mov    %rcx,%r10
  lea    -0x1(%r11),%eax
  shl    $0x4,%r10
  shl    $0x5,%rcx
  mov    %eax,-0x28(%rsp)
  lea    (%r12,%r15,1),%rdi
  add    %r15,%rcx
  mov    %r14d,-0x24(%rsp)
  lea    (%r15,%r8,8),%r8
  lea    (%r10,%r15,1),%r14
  mov    %r14,-0x38(%rsp)
  lea    (%rbx,%r15,1),%rsi
  add    %rbx,%rdi
  add    %rbx,%r8
  mov    %rcx,-0x40(%rsp)
  mov    $0x8,%r14d
  mov    %rbx,%rcx
  nopw   0x0(%rax,%rax,1)
L12:
  movsd  (%rdx),%xmm2
  movsd  0x8(%rcx),%xmm0
  movsd  0x8(%rdx),%xmm7
  movsd  0x10(%rdx),%xmm6
  mulsd  %xmm2,%xmm0
  movsd  0x18(%rdx),%xmm5
  movsd  0x20(%rdx),%xmm4
  mov    -0x38(%rsp),%rax
  movsd  0x28(%rdx),%xmm3
  movsd  0x30(%rcx),%xmm1
  mov    -0x20(%rsp),%rbp
  lea    (%rcx,%rax,1),%r11
  mov    -0x40(%rsp),%rax
  mulsd  %xmm2,%xmm1
  add    %rcx,%rbp
  subsd  %xmm0,%xmm7
  movsd  0x10(%rcx),%xmm0
  lea    (%rax,%rcx,1),%r10
  mov    -0x30(%rsp),%rax
  mulsd  %xmm2,%xmm0
  lea    (%rcx,%rax,1),%rbx
  lea    (%rcx,%r15,1),%rax
  subsd  %xmm0,%xmm6
  movsd  (%rsi),%xmm0
  mulsd  %xmm7,%xmm0
  subsd  %xmm0,%xmm6
  movsd  0x18(%rcx),%xmm0
  mulsd  %xmm2,%xmm0
  subsd  %xmm0,%xmm5
  movsd  0x8(%rsi),%xmm0
  mulsd  %xmm7,%xmm0
  subsd  %xmm0,%xmm5
  movsd  (%rdi),%xmm0
  mulsd  %xmm6,%xmm0
  subsd  %xmm0,%xmm5
  movsd  0x20(%rcx),%xmm0
  mulsd  %xmm2,%xmm0
  subsd  %xmm0,%xmm4
  movsd  0x10(%rsi),%xmm0
  mulsd  %xmm7,%xmm0
  subsd  %xmm0,%xmm4
  movsd  0x8(%rdi),%xmm0
  mulsd  %xmm6,%xmm0
  subsd  %xmm0,%xmm4
  movsd  (%rax,%r12,2),%xmm0
  mulsd  %xmm5,%xmm0
  subsd  %xmm0,%xmm4
  movsd  0x28(%rcx),%xmm0
  mulsd  %xmm2,%xmm0
  subsd  %xmm0,%xmm3
  movsd  0x18(%rsi),%xmm0
  mulsd  %xmm7,%xmm0
  subsd  %xmm0,%xmm3
  movsd  0x10(%rdi),%xmm0
  mulsd  %xmm6,%xmm0
  subsd  %xmm0,%xmm3
  movsd  0x8(%rax,%r12,2),%xmm0
  mulsd  %xmm5,%xmm0
  subsd  %xmm0,%xmm3
  movsd  (%r9),%xmm0
  mulsd  %xmm4,%xmm0
  subsd  %xmm0,%xmm3
  movsd  0x30(%rdx),%xmm0
  subsd  %xmm1,%xmm0
  movapd %xmm0,%xmm8
  movsd  0x20(%rsi),%xmm0
  mulsd  %xmm7,%xmm0
  subsd  %xmm0,%xmm8
  movsd  0x18(%rdi),%xmm0
  mulsd  %xmm6,%xmm0
  subsd  %xmm0,%xmm8
  movsd  0x10(%rax,%r12,2),%xmm0
  mulsd  %xmm5,%xmm0
  subsd  %xmm0,%xmm8
  movsd  0x8(%rbp,%r15,1),%xmm0
  mulsd  %xmm4,%xmm0
  subsd  %xmm0,%xmm8
  movsd  (%rax,%r12,4),%xmm0
  movsd  0x38(%rcx),%xmm9
  mulsd  %xmm3,%xmm0
  mulsd  %xmm2,%xmm9
  subsd  %xmm0,%xmm8
  movsd  0x38(%rdx),%xmm0
  movapd %xmm0,%xmm1
  movsd  0x28(%rsi),%xmm0
  subsd  %xmm9,%xmm1
  mulsd  %xmm7,%xmm0
  subsd  %xmm0,%xmm1
  movsd  0x20(%rdi),%xmm0
  mulsd  %xmm6,%xmm0
  subsd  %xmm0,%xmm1
  movsd  0x18(%rax,%r12,2),%xmm0
  mulsd  %xmm5,%xmm0
  subsd  %xmm0,%xmm1
  movsd  0x10(%rbp,%r15,1),%xmm0
  mulsd  %xmm4,%xmm0
  subsd  %xmm0,%xmm1
  movsd  0x8(%rax,%r12,4),%xmm0
  mulsd  %xmm3,%xmm0
  subsd  %xmm0,%xmm1
  movsd  (%r8),%xmm0
  movsd  %xmm7,0x8(%rdx)
  movsd  %xmm6,0x10(%rdx)
  mulsd  %xmm8,%xmm0
  movsd  %xmm5,0x18(%rdx)
  movsd  %xmm4,0x20(%rdx)
  movsd  %xmm3,0x28(%rdx)
  movsd  %xmm8,0x30(%rdx)
  subsd  %xmm0,%xmm1
  movsd  %xmm1,0x38(%rdx)
  cmp    %r14d,-0x44(%rsp)
  jle    L5
  mov    -0x28(%rsp),%eax
  sub    %r14d,%eax
  lea    0x8(,%rax,8),%rbp
  xor    %eax,%eax
  nopl   0x0(%rax,%rax,1)
L81:
  movsd  0x40(%rcx,%rax,1),%xmm9
  movsd  0x40(%rdx,%rax,1),%xmm0
  mulsd  %xmm2,%xmm9
  subsd  %xmm9,%xmm0
  movsd  0x30(%rsi,%rax,1),%xmm9
  mulsd  %xmm7,%xmm9
  subsd  %xmm9,%xmm0
  movsd  0x28(%rdi,%rax,1),%xmm9
  mulsd  %xmm6,%xmm9
  subsd  %xmm9,%xmm0
  movsd  0x20(%r11,%rax,1),%xmm9
  mulsd  %xmm5,%xmm9
  subsd  %xmm9,%xmm0
  movsd  0x18(%r9,%rax,1),%xmm9
  mulsd  %xmm4,%xmm9
  subsd  %xmm9,%xmm0
  movsd  0x10(%r10,%rax,1),%xmm9
  mulsd  %xmm3,%xmm9
  subsd  %xmm9,%xmm0
  movsd  0x8(%r8,%rax,1),%xmm9
  mulsd  %xmm8,%xmm9
  subsd  %xmm9,%xmm0
  movsd  (%rbx,%rax,1),%xmm9
  mulsd  %xmm1,%xmm9
  subsd  %xmm9,%xmm0
  movsd  %xmm0,0x40(%rdx,%rax,1)
  add    $0x8,%rax
  cmp    %rax,%rbp
  jne    L81
L5:
  add    %r13,%rcx
  add    $0x8,%r14d
  add    $0x40,%rdx
  add    %r13,%rsi
  add    %r13,%rdi
  add    %r13,%r9
  add    %r13,%r8
  cmp    %r14d,-0x24(%rsp)
  jne    L12
  mov    -0x4(%rsp),%r10d
  shr    $0x3,%r10d
  lea    0x1(%r10),%eax
  mov    %rax,%r10
  imul   %r13,%rax
  add    %rax,-0x18(%rsp)
  shl    $0x3,%r10d
L63:
  mov    -0x44(%rsp),%r14d
  lea    -0x3(%r14),%r13d
  cmp    %r10d,%r13d
  jle    L101
  movslq -0x8(%rsp),%r12
  mov    -0x18(%rsp),%rdi
  mov    %r10d,%r11d
  mov    -0x28(%rsp),%r15d
  mov    %r12,%rbx
  add    $0x1,%r12
  lea    0x0(,%rbx,4),%edx
  lea    0x0(,%r12,8),%rcx
  shl    $0x4,%r12
  mov    -0x10(%rsp),%rbx
  movslq %edx,%rdx
  lea    0x8(%rcx),%rax
  lea    0x20(,%rdx,8),%rbp
  movslq %r10d,%rdx
  lea    (%rdi,%rax,1),%rsi
  add    %rax,%r12
  lea    (%rbx,%rdx,8),%rdx
  lea    0x8(%rcx,%rax,1),%rbx
  mov    %rdi,%rcx
  add    %rdi,%rbx
  nopw   0x0(%rax,%rax,1)
L24:
  movsd  0x8(%rcx),%xmm0
  movsd  (%rdx),%xmm5
  add    $0x4,%r11d
  lea    -0x8(%rbx),%rdi
  movsd  0x8(%rdx),%xmm4
  movsd  0x10(%rdx),%xmm3
  lea    (%rcx,%r12,1),%r8
  mulsd  %xmm5,%xmm0
  movsd  0x18(%rdx),%xmm2
  subsd  %xmm0,%xmm4
  movsd  0x10(%rcx),%xmm0
  mulsd  %xmm5,%xmm0
  subsd  %xmm0,%xmm3
  movsd  (%rsi),%xmm0
  mulsd  %xmm4,%xmm0
  subsd  %xmm0,%xmm3
  movsd  0x18(%rcx),%xmm0
  mulsd  %xmm5,%xmm0
  subsd  %xmm0,%xmm2
  movsd  0x8(%rsi),%xmm0
  mulsd  %xmm4,%xmm0
  subsd  %xmm0,%xmm2
  movsd  -0x8(%rbx),%xmm0
  movsd  %xmm4,0x8(%rdx)
  movsd  %xmm3,0x10(%rdx)
  mulsd  %xmm3,%xmm0
  subsd  %xmm0,%xmm2
  movsd  %xmm2,0x18(%rdx)
  cmp    %r11d,%r14d
  jle    L113
  mov    %r15d,%eax
  sub    %r11d,%eax
  lea    0x8(,%rax,8),%r9
  xor    %eax,%eax
L91:
  movsd  0x20(%rcx,%rax,1),%xmm1
  movsd  0x20(%rdx,%rax,1),%xmm0
  mulsd  %xmm5,%xmm1
  subsd  %xmm1,%xmm0
  movsd  0x10(%rsi,%rax,1),%xmm1
  mulsd  %xmm4,%xmm1
  subsd  %xmm1,%xmm0
  movsd  0x8(%rdi,%rax,1),%xmm1
  mulsd  %xmm3,%xmm1
  subsd  %xmm1,%xmm0
  movsd  (%r8,%rax,1),%xmm1
  mulsd  %xmm2,%xmm1
  subsd  %xmm1,%xmm0
  movsd  %xmm0,0x20(%rdx,%rax,1)
  add    $0x8,%rax
  cmp    %rax,%r9
  jne    L91
L113:
  add    %rbp,%rcx
  add    $0x20,%rdx
  add    %rbp,%rsi
  add    %rbp,%rbx
  cmp    %r13d,%r11d
  jl     L24
  mov    -0x44(%rsp),%eax
  sub    $0x4,%eax
  sub    %r10d,%eax
  shr    $0x2,%eax
  lea    0x1(%rax),%edx
  lea    0x4(%r10,%rax,4),%r10d
  imul   %rbp,%rdx
  add    %rdx,-0x18(%rsp)
L101:
  cmp    %r10d,-0x28(%rsp)
  jle    L98
  movslq -0x8(%rsp),%rax
  mov    -0x10(%rsp),%r15
  mov    -0x18(%rsp),%rbx
  mov    -0x44(%rsp),%edi
  lea    0x10(,%rax,8),%rdx
  movslq %r10d,%rax
  movsd  (%r15,%rax,8),%xmm3
  movsd  0x8(%rbx),%xmm0
  lea    0x0(,%rax,8),%rsi
  lea    0x8(%r15,%rsi,1),%rax
  mulsd  %xmm3,%xmm0
  movsd  (%rax),%xmm2
  subsd  %xmm0,%xmm2
  movsd  %xmm2,(%rax)
  lea    0x2(%r10),%eax
  cmp    %eax,%edi
  jle    L98
  sub    %rsi,%rdx
  mov    %rbx,%rcx
  cltq
  sub    %rsi,%rcx
  add    %rbx,%rdx
  mov    %r15,%rsi
  nopl   0x0(%rax,%rax,1)
L9:
  movsd  (%rcx,%rax,8),%xmm1
  movsd  (%rsi,%rax,8),%xmm0
  mulsd  %xmm3,%xmm1
  subsd  %xmm1,%xmm0
  movsd  -0x10(%rdx,%rax,8),%xmm1
  mulsd  %xmm2,%xmm1
  subsd  %xmm1,%xmm0
  movsd  %xmm0,(%rsi,%rax,8)
  add    $0x1,%rax
  cmp    %eax,%edi
  jg     L9
L98:
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L88:
  mov    -0x44(%rsp),%eax
  xor    %r10d,%r10d
  sub    $0x1,%eax
  mov    %eax,-0x28(%rsp)
  jmp    L63
```

assistant: ```c
void dlsolve(int ldm, int ncol, double *M, double *rhs) {
  int k;
  double x0, x1, x2, x3, x4, x5, x6, x7;
  double *M0;
  register double *Mki0, *Mki1, *Mki2, *Mki3, *Mki4, *Mki5, *Mki6, *Mki7;
  register int firstcol = 0;
  M0 = &M[0];
  while (firstcol < ncol - 7) {
    Mki0 = M0 + 1;
    Mki1 = Mki0 + ldm + 1;
    Mki2 = Mki1 + ldm + 1;
    Mki3 = Mki2 + ldm + 1;
    Mki4 = Mki3 + ldm + 1;
    Mki5 = Mki4 + ldm + 1;
    Mki6 = Mki5 + ldm + 1;
    Mki7 = Mki6 + ldm + 1;
    x0 = rhs[firstcol];
    x1 = rhs[firstcol + 1] - x0 * *Mki0++;
    x2 = rhs[firstcol + 2] - x0 * *Mki0++ - x1 * *Mki1++;
    x3 = rhs[firstcol + 3] - x0 * *Mki0++ - x1 * *Mki1++ - x2 * *Mki2++;
    x4 = rhs[firstcol + 4] - x0 * *Mki0++ - x1 * *Mki1++ - x2 * *Mki2++ - x3 * *Mki3++;
    x5 = rhs[firstcol + 5] - x0 * *Mki0++ - x1 * *Mki1++ - x2 * *Mki2++ - x3 * *Mki3++ - x4 * *Mki4++;
    x6 = rhs[firstcol + 6] - x0 * *Mki0++ - x1 * *Mki1++ - x2 * *Mki2++ - x3 * *Mki3++ - x4 * *Mki4++ - x5 * *Mki5++;
    x7 = rhs[firstcol + 7] - x0 * *Mki0++ - x1 * *Mki1++ - x2 * *Mki2++ - x3 * *Mki3++ - x4 * *Mki4++ - x5 * *Mki5++ - x6 * *Mki6++;
    rhs[++firstcol] = x1;
    rhs[++firstcol] = x2;
    rhs[++firstcol] = x3;
    rhs[++firstcol] = x4;
    rhs[++firstcol] = x5;
    rhs[++firstcol] = x6;
    rhs[++firstcol] = x7;
    ++firstcol;
    for (k = firstcol; k < ncol; k++)
      rhs[k] = rhs[k] - x0 * *Mki0++ - x1 * *Mki1++ - x2 * *Mki2++ - x3 * *Mki3++ - x4 * *Mki4++ - x5 * *Mki5++ - x6 * *Mki6++ - x7 * *Mki7++;
    M0 += 8 * ldm + 8;
  }
  while (firstcol < ncol - 3) {
    Mki0 = M0 + 1;
    Mki1 = Mki0 + ldm + 1;
    Mki2 = Mki1 + ldm + 1;
    Mki3 = Mki2 + ldm + 1;
    x0 = rhs[firstcol];
    x1 = rhs[firstcol + 1] - x0 * *Mki0++;
    x2 = rhs[firstcol + 2] - x0 * *Mki0++ - x1 * *Mki1++;
    x3 = rhs[firstcol + 3] - x0 * *Mki0++ - x1 * *Mki1++ - x2 * *Mki2++;
    rhs[++firstcol] = x1;
    rhs[++firstcol] = x2;
    rhs[++firstcol] = x3;
    ++firstcol;
    for (k = firstcol; k < ncol; k++)
      rhs[k] = rhs[k] - x0 * *Mki0++ - x1 * *Mki1++ - x2 * *Mki2++ - x3 * *Mki3++;
    M0 += 4 * ldm + 4;
  }
  if (firstcol < ncol - 1) {
    Mki0 = M0 + 1;
    Mki1 = Mki0 + ldm + 1;
    x0 = rhs[firstcol];
    x1 = rhs[firstcol + 1] - x0 * *Mki0++;
    rhs[++firstcol] = x1;
    ++firstcol;
    for (k = firstcol; k < ncol; k++)
      rhs[k] = rhs[k] - x0 * *Mki0++ - x1 * *Mki1++;
  }
}
```