user: Please show me the C implementation that matches the assembly code listed below:

```asm
<spacing>:
  endbr64
  push   %rbx
  movslq %edi,%rdi
  mov    %rdi,%rbx
  shl    $0x3,%rdi
  sub    $0x10,%rsp
  movsd  %xmm1,(%rsp)
  movsd  %xmm0,0x8(%rsp)
  call   <malloc@plt>
  cmp    $0x1,%ebx
  movsd  (%rsp),%xmm1
  movsd  0x8(%rsp),%xmm7
  mov    %rax,%r8
  je     L33
  test   %ebx,%ebx
  jle    L40
  lea    -0x1(%rbx),%ecx
  pxor   %xmm10,%xmm10
  cvtsi2sd %ecx,%xmm10
  cmp    $0x2,%ecx
  jbe    L42
  movd   %ecx,%xmm3
  movapd %xmm7,%xmm6
  movapd %xmm1,%xmm5
  mov    %ebx,%edx
  movapd %xmm10,%xmm4
  shr    $0x2,%edx
  unpcklpd %xmm6,%xmm6
  unpcklpd %xmm5,%xmm5
  pshufd $0x0,%xmm3,%xmm9
  shl    $0x5,%rdx
  movdqa D11(%rip),%xmm3
  unpcklpd %xmm4,%xmm4
  movdqa D4(%rip),%xmm8
  add    %rax,%rdx
  nopl   0x0(%rax,%rax,1)
L29:
  movdqa %xmm3,%xmm2
  movdqa %xmm9,%xmm0
  add    $0x20,%rax
  psubd  %xmm2,%xmm0
  cvtdq2pd %xmm2,%xmm12
  pshufd $0xee,%xmm2,%xmm2
  paddd  %xmm8,%xmm3
  cvtdq2pd %xmm0,%xmm11
  pshufd $0xee,%xmm0,%xmm0
  cvtdq2pd %xmm2,%xmm2
  mulpd  %xmm6,%xmm11
  cvtdq2pd %xmm0,%xmm0
  mulpd  %xmm5,%xmm12
  mulpd  %xmm6,%xmm0
  mulpd  %xmm5,%xmm2
  addpd  %xmm12,%xmm11
  addpd  %xmm2,%xmm0
  divpd  %xmm4,%xmm11
  divpd  %xmm4,%xmm0
  movups %xmm11,-0x20(%rax)
  movups %xmm0,-0x10(%rax)
  cmp    %rdx,%rax
  jne    L29
  mov    %ebx,%eax
  and    $0xfffffffc,%eax
  test   $0x3,%bl
  je     L40
  mov    %ecx,%edi
  pxor   %xmm0,%xmm0
  pxor   %xmm2,%xmm2
  movslq %eax,%rsi
  sub    %eax,%edi
  cvtsi2sd %eax,%xmm2
  add    $0x1,%eax
  cvtsi2sd %edi,%xmm0
  lea    0x0(,%rsi,8),%rdx
  mulsd  %xmm1,%xmm2
  mulsd  %xmm7,%xmm0
  addsd  %xmm2,%xmm0
  divsd  %xmm10,%xmm0
  movsd  %xmm0,(%r8,%rsi,8)
  cmp    %eax,%ebx
  jle    L40
L65:
  mov    %ecx,%esi
  pxor   %xmm0,%xmm0
  pxor   %xmm2,%xmm2
  sub    %eax,%esi
  cvtsi2sd %eax,%xmm2
  add    $0x1,%eax
  cvtsi2sd %esi,%xmm0
  mulsd  %xmm1,%xmm2
  mulsd  %xmm7,%xmm0
  addsd  %xmm2,%xmm0
  divsd  %xmm10,%xmm0
  movsd  %xmm0,0x8(%r8,%rdx,1)
  cmp    %eax,%ebx
  jle    L40
  sub    %eax,%ecx
  pxor   %xmm0,%xmm0
  pxor   %xmm2,%xmm2
  cvtsi2sd %ecx,%xmm0
  cvtsi2sd %eax,%xmm2
  mulsd  %xmm7,%xmm0
  mulsd  %xmm2,%xmm1
  addsd  %xmm1,%xmm0
  divsd  %xmm10,%xmm0
  movsd  %xmm0,0x10(%r8,%rdx,1)
L40:
  add    $0x10,%rsp
  mov    %r8,%rax
  pop    %rbx
  ret
  nopl   (%rax)
L33:
  addsd  %xmm7,%xmm1
  mulsd  D7(%rip),%xmm1
  movsd  %xmm1,(%rax)
  add    $0x10,%rsp
  mov    %r8,%rax
  pop    %rbx
  ret
L42:
  pxor   %xmm2,%xmm2
  movapd %xmm10,%xmm0
  xor    %edx,%edx
  mulsd  %xmm1,%xmm2
  mulsd  %xmm7,%xmm0
  addsd  %xmm2,%xmm0
  divsd  %xmm10,%xmm0
  movsd  %xmm0,(%rax)
  mov    $0x1,%eax
  jmp    L65
```

tool_calls: name: unpack_data
arguments: label: D11
type_guessed: byte[16]
name: unpack_data
arguments: label: D4
type_guessed: byte[16]
name: unpack_data
arguments: label: D7
type_guessed: byte[8]

tool: {"D11": [0x00,0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x02,0x00,0x00,0x00,0x03,0x00,0x00,0x00]}

tool: {"D4": [0x04,0x00,0x00,0x00,0x04,0x00,0x00,0x00,0x04,0x00,0x00,0x00,0x04,0x00,0x00,0x00]}

tool: {"D7": [0x00,0x00,0x00,0x00,0x00,0x00,0xe0,0x3f]}

assistant: ```c
double *spacing(int n, double a, double b) {
  int i;
  double *x;
  x = (double *)malloc(n * sizeof(double));
  if (n == 1) {
    x[0] = (a + b) / 2.0;
  } else {
    for (i = 0; i < n; i++) {
      x[i] = ((double)(n - 1 - i) * a + (double)(i)*b) / (double)(n - 1);
    }
  }
  return x;
}
```