user: Demonstrate the C code that generates the assembly output below:

```asm
<normals>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x48,%rsp
  mov    %rsi,0x10(%rsp)
  mov    %rdx,0x18(%rsp)
  mov    %rcx,0x20(%rsp)
  mov    %r8,0x28(%rsp)
  mov    0x80(%rsp),%rbp
  mov    0x88(%rsp),%eax
  cmp    $0x2,%eax
  jle    L31
  mov    %rdi,%r12
  sub    $0x1,%eax
  mov    %eax,0x3c(%rsp)
  mov    0x90(%rsp),%eax
  mov    %eax,0x38(%rsp)
  movl   $0x1,0x34(%rsp)
  mov    %r9,%r15
  jmp    L28
L45:
  movss  0x4(%rsp),%xmm0
  divss  %xmm1,%xmm0
  mov    0x20(%rsp),%rax
  movss  %xmm0,(%rax,%rbx,1)
  movss  0x30(%rsp),%xmm0
  divss  %xmm1,%xmm0
  mov    0x28(%rsp),%rax
  movss  %xmm0,(%rax,%rbx,1)
  movss  (%rsp),%xmm0
  divss  %xmm1,%xmm0
  movss  %xmm0,(%r15,%rbx,1)
  add    $0x4,%rbx
  cmp    0x8(%rsp),%rbx
  je     L78
L44:
  movss  0x4(%r12,%rbx,1),%xmm0
  subss  -0x4(%r12,%rbx,1),%xmm0
  mulss  D13(%rip),%xmm0
  xorps  D0(%rip),%xmm0
  movss  (%r14,%rbx,1),%xmm1
  subss  0x0(%r13,%rbx,1),%xmm1
  mulss  D13(%rip),%xmm1
  xorps  D0(%rip),%xmm1
  mov    0x10(%rsp),%rax
  movaps %xmm0,%xmm2
  mulss  (%rax,%rbx,1),%xmm2
  mov    0x18(%rsp),%rax
  movaps %xmm1,%xmm3
  mulss  (%rax,%rbx,1),%xmm3
  addss  %xmm3,%xmm2
  addss  (%r12,%rbx,1),%xmm2
  xorps  D0(%rip),%xmm2
  movaps %xmm0,%xmm3
  mulss  0x0(%rbp),%xmm3
  movaps %xmm1,%xmm4
  mulss  0x4(%rbp),%xmm4
  addss  %xmm4,%xmm3
  addss  0x8(%rbp),%xmm3
  movaps %xmm2,%xmm4
  mulss  0xc(%rbp),%xmm4
  movaps %xmm3,%xmm6
  addss  %xmm4,%xmm6
  movss  %xmm6,0x4(%rsp)
  movaps %xmm0,%xmm3
  mulss  0x10(%rbp),%xmm3
  movaps %xmm1,%xmm4
  mulss  0x14(%rbp),%xmm4
  addss  %xmm4,%xmm3
  addss  0x18(%rbp),%xmm3
  movaps %xmm2,%xmm4
  mulss  0x1c(%rbp),%xmm4
  movaps %xmm3,%xmm7
  addss  %xmm4,%xmm7
  movss  %xmm7,0x30(%rsp)
  mulss  0x20(%rbp),%xmm0
  mulss  0x24(%rbp),%xmm1
  addss  %xmm1,%xmm0
  addss  0x28(%rbp),%xmm0
  mulss  0x2c(%rbp),%xmm2
  movaps %xmm0,%xmm5
  addss  %xmm2,%xmm5
  movaps %xmm6,%xmm0
  mulss  %xmm6,%xmm0
  movaps %xmm7,%xmm1
  mulss  %xmm7,%xmm1
  addss  %xmm1,%xmm0
  movaps %xmm5,%xmm1
  movss  %xmm5,(%rsp)
  mulss  %xmm5,%xmm1
  addss  %xmm1,%xmm0
  call   <sqrt@plt>
  movaps %xmm0,%xmm1
  pxor   %xmm6,%xmm6
  comiss (%rsp),%xmm6
  jbe    L45
  xorps  D0(%rip),%xmm1
  jmp    L45
L78:
  addl   $0x1,0x34(%rsp)
  mov    0x34(%rsp),%eax
  mov    0x90(%rsp),%edi
  add    %edi,0x38(%rsp)
  cmp    0x3c(%rsp),%eax
  je     L31
L28:
  cmpl   $0x2,0x90(%rsp)
  jle    L78
  mov    0x38(%rsp),%ecx
  movslq %ecx,%rax
  lea    0x4(,%rax,4),%rbx
  mov    0x90(%rsp),%esi
  lea    -0x3(%rsi),%edx
  lea    0x2(%rax,%rdx,1),%rdx
  lea    0x0(,%rdx,4),%rdi
  mov    %rdi,0x8(%rsp)
  neg    %rax
  shl    $0x2,%rax
  mov    %ecx,%edx
  add    %esi,%edx
  movslq %edx,%rdx
  lea    (%rax,%rdx,4),%r14
  add    %r12,%r14
  sub    %esi,%ecx
  movslq %ecx,%rdx
  lea    (%rax,%rdx,4),%r13
  add    %r12,%r13
  jmp    L44
L31:
  add    $0x48,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
```

tool_calls: name: disassemble_data
arguments: tag: D13
type_infered: byte[4]
name: disassemble_data
arguments: tag: D0
type_infered: byte[16]

tool: {"D13": [0x00,0x00,0x00,0x3f]}

tool: {"D0": [0x00,0x00,0x00,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00]}

assistant: ```c
void normals(float *depth, float *u, float *v, float *nx, float *ny, float *nz, float mat[4][4], int h, int w) {
  int i, j;
  for (i = 1; i < h - 1; i++) {
    for (j = 1; j < w - 1; j++) {
      float dx = (depth[i * w + j + 1] - depth[i * w + j - 1]) / 2;
      float dy = (depth[(i + 1) * w + j] - depth[(i - 1) * w + j]) / 2;
      float X = -dx, Y = -dy, Z = 1, W = -(-dx * u[i * w + j] + -dy * v[i * w + j] + depth[i * w + j]);
      float x = X * mat[0][0] + Y * mat[0][1] + Z * mat[0][2] + W * mat[0][3];
      float y = X * mat[1][0] + Y * mat[1][1] + Z * mat[1][2] + W * mat[1][3];
      float z = X * mat[2][0] + Y * mat[2][1] + Z * mat[2][2] + W * mat[2][3];
      float w_ = sqrt(x * x + y * y + z * z);
      if (z < 0)
        w_ *= -1;
      nx[i * w + j] = x / w_;
      ny[i * w + j] = y / w_;
      nz[i * w + j] = z / w_;
    }
  }
}
```