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

```asm
<testKnnSmooth>:
  endbr64
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x50,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x48(%rsp)
  xor    %eax,%eax
  lea    0x8(%rsp),%rdi
  lea    0x18(%rsp),%rcx
  lea    0x10(%rsp),%rdx
  lea    0xc(%rsp),%rsi
  call   <makeData@plt>
  mov    D64(%rip),%rax
  mov    0x8(%rsp),%edi
  movq   $0x0,0x20(%rsp)
  mov    %rax,0x28(%rsp)
  mov    D84(%rip),%rax
  mov    %rax,0x30(%rsp)
  mov    D100(%rip),%rax
  mov    %rax,0x38(%rsp)
  test   %edi,%edi
  je     L36
  xor    %ebx,%ebx
  lea    0x20(%rsp),%rbp
  lea    D114(%rip),%r12
L69:
  mov    0x18(%rsp),%rcx
  mov    0x10(%rsp),%rdx
  mov    %ebx,%r9d
  xor    %eax,%eax
  mov    0xc(%rsp),%esi
  mov    $0x1,%r8d
  call   <Knn_smooth@plt>
  pxor   %xmm1,%xmm1
  mov    %r12,%rdi
  mov    $0xcd,%esi
  cvtsi2sd %eax,%xmm1
  mov    D61(%rip),%rdx
  mov    $0x3,%eax
  movsd  0x0(%rbp,%rbx,8),%xmm0
  add    $0x1,%rbx
  movq   %rdx,%xmm2
  call   <UnitTest_expect_eq_double@plt>
  mov    0x8(%rsp),%edi
  cmp    %ebx,%edi
  ja     L69
  mov    D14(%rip),%rax
  movsd  D112(%rip),%xmm0
  mov    %rax,0x30(%rsp)
  mov    D0(%rip),%rax
  movsd  %xmm0,0x20(%rsp)
  mov    %rax,0x38(%rsp)
  movsd  %xmm0,0x28(%rsp)
  test   %edi,%edi
  je     L36
  xor    %ebx,%ebx
L59:
  mov    0x18(%rsp),%rcx
  mov    0x10(%rsp),%rdx
  mov    %ebx,%r9d
  xor    %eax,%eax
  mov    0xc(%rsp),%esi
  mov    $0x2,%r8d
  call   <Knn_smooth@plt>
  pxor   %xmm1,%xmm1
  mov    %r12,%rdi
  mov    $0xdb,%esi
  cvtsi2sd %eax,%xmm1
  mov    D61(%rip),%rcx
  mov    $0x3,%eax
  movsd  0x0(%rbp,%rbx,8),%xmm0
  add    $0x1,%rbx
  movq   %rcx,%xmm2
  call   <UnitTest_expect_eq_double@plt>
  mov    0x8(%rsp),%edi
  cmp    %ebx,%edi
  ja     L59
  mov    D64(%rip),%rax
  mov    %rax,0x20(%rsp)
  mov    %rax,0x28(%rsp)
  mov    D84(%rip),%rax
  mov    %rax,0x30(%rsp)
  mov    %rax,0x38(%rsp)
  test   %edi,%edi
  je     L36
  xor    %ebx,%ebx
L32:
  mov    0x18(%rsp),%rcx
  mov    0x10(%rsp),%rdx
  mov    %ebx,%r9d
  xor    %eax,%eax
  mov    0xc(%rsp),%esi
  mov    $0x3,%r8d
  call   <Knn_smooth@plt>
  pxor   %xmm1,%xmm1
  mov    %r12,%rdi
  mov    $0xe9,%esi
  cvtsi2sd %eax,%xmm1
  mov    D61(%rip),%rdx
  mov    $0x3,%eax
  movsd  0x0(%rbp,%rbx,8),%xmm0
  add    $0x1,%rbx
  movq   %rdx,%xmm2
  call   <UnitTest_expect_eq_double@plt>
  mov    0x8(%rsp),%edi
  cmp    %ebx,%edi
  ja     L32
L36:
  mov    0x48(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L17
  add    $0x50,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  ret
L17:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: retrieve_data
arguments: data_label: D64
type_infered: f64
name: retrieve_data
arguments: data_label: D84
type_infered: f64
name: retrieve_data
arguments: data_label: D100
type_infered: f64
name: retrieve_data
arguments: data_label: D114
type_infered: string
name: retrieve_data
arguments: data_label: D61
type_infered: byte[8]
name: retrieve_data
arguments: data_label: D14
type_infered: f64
name: retrieve_data
arguments: data_label: D112
type_infered: f64
name: retrieve_data
arguments: data_label: D0
type_infered: f64

tool: D64: 1

tool: D84: 2

tool: D100: 3

tool: D114: testKnnSmooth

tool: {"D61": [0xbb,0xbd,0xd7,0xd9,0xdf,0x7c,0xdb,0x3d]}

tool: D14: 1.5

tool: D112: 0.5

tool: D0: 2.5

assistant: ```c
void testKnnSmooth() {
  const int trace = 0;
  unsigned nObs;
  unsigned nDims;
  double *inputsP;
  double *targetsP;
  makeData(&nObs, &nDims, &inputsP, &targetsP);
  {
    const unsigned k = 1;
    double expected[] = {0.0, 1.0, 2.0, 3.0};
    for (unsigned queryIndex = 0; queryIndex < nObs; queryIndex++) {
      double estimate = Knn_smooth(nObs, nDims, inputsP, targetsP, k, queryIndex);
      if (trace)
        printf("queryIndex=%u\n", queryIndex);
      UnitTest_expect_eq_double((expected[queryIndex]), (estimate), (1e-10), __func__, 205);
    }
  }
  {
    const unsigned k = 2;
    double expected[] = {0.5, 0.5, 1.5, 2.5};
    for (unsigned queryIndex = 0; queryIndex < nObs; queryIndex++) {
      double estimate = Knn_smooth(nObs, nDims, inputsP, targetsP, k, queryIndex);
      if (trace)
        printf("queryIndex=%u\n", queryIndex);
      UnitTest_expect_eq_double((expected[queryIndex]), (estimate), (1e-10), __func__, 219);
    }
  }
  {
    const unsigned k = 3;
    double expected[] = {1.0, 1.0, 2.0, 2.0};
    for (unsigned queryIndex = 0; queryIndex < nObs; queryIndex++) {
      double estimate = Knn_smooth(nObs, nDims, inputsP, targetsP, k, queryIndex);
      if (trace)
        printf("queryIndex=%u\n", queryIndex);
      UnitTest_expect_eq_double((expected[queryIndex]), (estimate), (1e-10), __func__, 233);
    }
  }
}
```