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

```asm
<asyevn>:
  endbr64
  mov    %rsi,%rcx
  movslq %edi,%rsi
  shl    $0x2,%rsi
  lea    (%rcx,%rsi,1),%r8
  cmp    %r8,%rcx
  jae    L51
  lea    0x4(%rcx),%rdi
  mov    %rdx,%rax
  lea    -0x1(%rsi),%r9
  sub    %rdi,%rax
  cmp    $0x8,%rax
  jbe    L38
  cmp    $0xb,%r9
  jbe    L38
  mov    %r9,%r10
  xor    %eax,%eax
  shr    $0x2,%r10
  add    $0x1,%r10
  mov    %r10,%rdi
  shr    $0x2,%rdi
  shl    $0x4,%rdi
  nopl   (%rax)
L164:
  movups (%rcx,%rax,1),%xmm2
  movups %xmm2,(%rdx,%rax,1)
  add    $0x10,%rax
  cmp    %rax,%rdi
  jne    L164
  mov    %r10,%r11
  and    $0xfffffffffffffffc,%r11
  lea    0x0(,%r11,4),%rax
  lea    (%rcx,%rax,1),%rdi
  add    %rdx,%rax
  cmp    %r11,%r10
  je     L107
  movss  (%rdi),%xmm0
  lea    0x4(%rdi),%r10
  movss  %xmm0,(%rax)
  cmp    %r10,%r8
  jbe    L107
  movss  0x4(%rdi),%xmm0
  lea    0x8(%rdi),%r10
  movss  %xmm0,0x4(%rax)
  cmp    %r10,%r8
  jbe    L107
  movss  0x8(%rdi),%xmm0
  movss  %xmm0,0x8(%rax)
L107:
  shr    $0x2,%r9
  lea    0x4(%rdx,%r9,4),%rdx
L51:
  lea    -0x4(%r8),%rdi
  cmp    %rdi,%rcx
  ja     L52
  lea    -0x4(%rsi),%r10
  mov    %r10,%rax
  shr    $0x2,%rax
  lea    0x1(%rax),%r9
  neg    %rax
  lea    (%r10,%rax,4),%rax
  lea    (%rdx,%r9,4),%r11
  add    %rcx,%rax
  cmp    %rax,%r11
  setbe  %al
  cmp    %rdx,%r8
  setbe  %r8b
  or     %r8b,%al
  je     L85
  cmp    $0xb,%r10
  jbe    L85
  mov    %r9,%r10
  lea    -0x10(%rcx,%rsi,1),%rax
  movaps D7(%rip),%xmm1
  mov    %rdx,%rsi
  shr    $0x2,%r10
  mov    %rax,%r8
  shl    $0x4,%r10
  sub    %r10,%r8
  nopl   (%rax)
L14:
  movups (%rax),%xmm0
  sub    $0x10,%rax
  add    $0x10,%rsi
  shufps $0x1b,%xmm0,%xmm0
  xorps  %xmm1,%xmm0
  movups %xmm0,-0x10(%rsi)
  cmp    %r8,%rax
  jne    L14
  mov    %r9,%rsi
  and    $0xfffffffffffffffc,%rsi
  mov    %rsi,%rax
  neg    %rax
  shl    $0x2,%rax
  add    %rax,%rdi
  sub    %rax,%rdx
  cmp    %rsi,%r9
  je     L52
  movss  (%rdi),%xmm0
  movss  D12(%rip),%xmm1
  lea    -0x4(%rdi),%rax
  xorps  %xmm1,%xmm0
  movss  %xmm0,(%rdx)
  cmp    %rax,%rcx
  ja     L52
  movss  -0x4(%rdi),%xmm0
  lea    -0x8(%rdi),%rax
  xorps  %xmm1,%xmm0
  movss  %xmm0,0x4(%rdx)
  cmp    %rax,%rcx
  ja     L52
  movss  -0x8(%rdi),%xmm0
  xorps  %xmm1,%xmm0
  movss  %xmm0,0x8(%rdx)
  ret
  nop
L85:
  movss  D12(%rip),%xmm1
  nopl   0x0(%rax,%rax,1)
L0:
  movss  (%rdi),%xmm0
  sub    $0x4,%rdi
  add    $0x4,%rdx
  xorps  %xmm1,%xmm0
  movss  %xmm0,-0x4(%rdx)
  cmp    %rdi,%rcx
  jbe    L0
L52:
  ret
  nopw   0x0(%rax,%rax,1)
L38:
  mov    %rdx,%rdi
  mov    %rcx,%rax
  cs nopw 0x0(%rax,%rax,1)
L30:
  movss  (%rax),%xmm0
  add    $0x4,%rax
  add    $0x4,%rdi
  movss  %xmm0,-0x4(%rdi)
  cmp    %rax,%r8
  ja     L30
  jmp    L107
```

tool_calls: name: retrieve_data
arguments: label: D7
data_type: byte[16]
name: retrieve_data
arguments: label: D12
data_type: byte[4]

tool: {"D7": [0x00,0x00,0x00,0x80,0x00,0x00,0x00,0x80,0x00,0x00,0x00,0x80,0x00,0x00,0x00,0x80]}

tool: {"D12": [0x00,0x00,0x00,0x80]}

assistant: ```c
void asyevn(n, v, u) int n;
float v[], u[];
{
  float *vp, *up, *vn = v + n;
  for (vp = v, up = u; vp < vn; vp++, up++)
    *up = *vp;
  for (vp = vn - 1; vp >= v; vp--, up++)
    *up = -(*vp);
}
```