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

```asm
<train>:
  endbr64
  add    $0x7,%edx
  mov    %ecx,%r8d
  and    $0xfffffff8,%edx
  jle    L25
  lea    0x2(%rdi),%rcx
  mov    %rsi,%rax
  sub    %rcx,%rax
  cmp    $0xc,%rax
  jbe    L21
  lea    -0x1(%rdx),%eax
  cmp    $0x6,%eax
  jbe    L21
  movd   %r8d,%xmm5
  shr    $0x3,%edx
  movdqa D16(%rip),%xmm6
  movdqa D12(%rip),%xmm3
  pshufd $0x0,%xmm5,%xmm4
  movdqa D26(%rip),%xmm2
  shl    $0x4,%rdx
  xor    %eax,%eax
  movdqa %xmm4,%xmm7
  pxor   %xmm5,%xmm5
  psrlq  $0x20,%xmm7
  nopl   0x0(%rax,%rax,1)
L38:
  movdqu (%rdi,%rax,1),%xmm1
  movdqa %xmm5,%xmm10
  movdqu (%rsi,%rax,1),%xmm8
  movdqa %xmm3,%xmm12
  pcmpgtw %xmm1,%xmm10
  movdqa %xmm1,%xmm9
  movdqa %xmm8,%xmm11
  punpcklwd %xmm10,%xmm9
  punpckhwd %xmm10,%xmm1
  movdqa %xmm9,%xmm0
  psrlq  $0x20,%xmm9
  pmuludq %xmm4,%xmm0
  pmuludq %xmm7,%xmm9
  pshufd $0x8,%xmm0,%xmm0
  pshufd $0x8,%xmm9,%xmm9
  punpckldq %xmm9,%xmm0
  movdqa %xmm5,%xmm9
  pcmpgtw %xmm8,%xmm9
  pslld  $0x1,%xmm0
  psrad  $0x10,%xmm0
  paddd  %xmm6,%xmm0
  punpcklwd %xmm9,%xmm11
  psrad  $0x1,%xmm0
  punpckhwd %xmm9,%xmm8
  paddd  %xmm11,%xmm0
  movdqa %xmm3,%xmm9
  movdqa %xmm0,%xmm11
  pcmpgtd %xmm3,%xmm11
  pand   %xmm11,%xmm12
  pandn  %xmm0,%xmm11
  por    %xmm12,%xmm11
  movdqa %xmm11,%xmm0
  pcmpgtd %xmm2,%xmm0
  pand   %xmm0,%xmm11
  pandn  %xmm2,%xmm0
  por    %xmm11,%xmm0
  movdqa %xmm1,%xmm11
  psrlq  $0x20,%xmm11
  pmuludq %xmm4,%xmm1
  pmuludq %xmm7,%xmm11
  pshufd $0x8,%xmm1,%xmm1
  pshufd $0x8,%xmm11,%xmm11
  punpckldq %xmm11,%xmm1
  pslld  $0x1,%xmm1
  psrad  $0x10,%xmm1
  paddd  %xmm6,%xmm1
  psrad  $0x1,%xmm1
  paddd  %xmm8,%xmm1
  movdqa %xmm1,%xmm8
  pcmpgtd %xmm3,%xmm8
  pand   %xmm8,%xmm9
  pandn  %xmm1,%xmm8
  por    %xmm9,%xmm8
  movdqa %xmm8,%xmm1
  pcmpgtd %xmm2,%xmm1
  pand   %xmm1,%xmm8
  pandn  %xmm2,%xmm1
  por    %xmm8,%xmm1
  movdqa %xmm0,%xmm8
  punpcklwd %xmm1,%xmm0
  punpckhwd %xmm1,%xmm8
  movdqa %xmm0,%xmm1
  punpcklwd %xmm8,%xmm0
  punpckhwd %xmm8,%xmm1
  punpcklwd %xmm1,%xmm0
  movups %xmm0,(%rsi,%rax,1)
  add    $0x10,%rax
  cmp    %rdx,%rax
  jne    L38
  ret
  nopl   0x0(%rax)
L21:
  mov    %edx,%edx
  xor    %ecx,%ecx
  nopl   0x0(%rax)
L0:
  movswl (%rdi,%rcx,2),%eax
  movswl (%rsi,%rcx,2),%r9d
  imul   %r8d,%eax
  add    %eax,%eax
  sar    $0x10,%eax
  add    $0x1,%eax
  sar    %eax
  add    %r9d,%eax
  mov    $0x7fff,%r9d
  cmp    %r9d,%eax
  cmovg  %r9d,%eax
  mov    $0xffff8000,%r9d
  cmp    %r9d,%eax
  cmovl  %r9d,%eax
  mov    %ax,(%rsi,%rcx,2)
  add    $0x1,%rcx
  cmp    %rcx,%rdx
  jne    L0
L25:
  ret
```

tool_calls: name: retrieve_data
arguments: label: D16
type: byte[16]
name: retrieve_data
arguments: label: D12
type: byte[16]
name: retrieve_data
arguments: label: D26
type: byte[16]

tool: {"D16": [0x01,0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x01,0x00,0x00,0x00]}

tool: {"D12": [0xff,0x7f,0x00,0x00,0xff,0x7f,0x00,0x00,0xff,0x7f,0x00,0x00,0xff,0x7f,0x00,0x00]}

tool: {"D26": [0x00,0x80,0xff,0xff,0x00,0x80,0xff,0xff,0x00,0x80,0xff,0xff,0x00,0x80,0xff,0xff]}

assistant: ```c
void train(short *t, short *w, int n, int err) {
  n = (n + 7) & -8;
  for (int i = 0; i < n; ++i) {
    int wt = w[i] + ((t[i] * err * 2 >> 16) + 1 >> 1);
    if (wt < -32768)
      wt = -32768;
    if (wt > 32767)
      wt = 32767;
    w[i] = wt;
  }
}
```