user: What is the c source code of the assembly code below:

```asm
<helper_float_4>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  mov    %rdi,-0x18(%rbp)
  movl   $0x0,-0x8(%rbp)
  jmp    L19
L0:
  movl   $0x0,-0x4(%rbp)
  jmp    L10
L38:
  mov    -0x8(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x4(%rbp),%eax
  cltq
  add    %rdx,%rax
  lea    0x0(,%rax,4),%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  mov    -0x8(%rbp),%edx
  movslq %edx,%rcx
  mov    -0x4(%rbp),%edx
  movslq %edx,%rdx
  add    %rcx,%rdx
  add    $0x4,%rdx
  lea    0x0(,%rdx,4),%rcx
  mov    -0x18(%rbp),%rdx
  add    %rcx,%rdx
  mov    -0x8(%rbp),%ecx
  movslq %ecx,%rsi
  mov    -0x4(%rbp),%ecx
  movslq %ecx,%rcx
  add    %rsi,%rcx
  add    $0x8,%rcx
  lea    0x0(,%rcx,4),%rsi
  mov    -0x18(%rbp),%rcx
  add    %rsi,%rcx
  mov    -0x8(%rbp),%esi
  movslq %esi,%rdi
  mov    -0x4(%rbp),%esi
  movslq %esi,%rsi
  add    %rdi,%rsi
  add    $0xc,%rsi
  lea    0x0(,%rsi,4),%rdi
  mov    -0x18(%rbp),%rsi
  add    %rdi,%rsi
  movups (%rax),%xmm0
  movups (%rdx),%xmm1
  movups (%rcx),%xmm2
  movups (%rsi),%xmm3
  movaps %xmm0,%xmm8
  shufps $0xa0,%xmm8,%xmm8
  shufps $0xf5,%xmm0,%xmm0
  xorps  %xmm9,%xmm9
  subps  %xmm0,%xmm9
  addsubps %xmm9,%xmm8
  movaps %xmm8,%xmm0
  movaps %xmm1,%xmm8
  shufps $0xa0,%xmm8,%xmm8
  shufps $0xf5,%xmm1,%xmm1
  xorps  %xmm9,%xmm9
  subps  %xmm1,%xmm9
  addsubps %xmm9,%xmm8
  movaps %xmm8,%xmm1
  movaps %xmm2,%xmm8
  shufps $0xa0,%xmm8,%xmm8
  shufps $0xf5,%xmm2,%xmm2
  xorps  %xmm9,%xmm9
  subps  %xmm2,%xmm9
  addsubps %xmm9,%xmm8
  movaps %xmm8,%xmm2
  movaps %xmm3,%xmm8
  shufps $0xa0,%xmm8,%xmm8
  shufps $0xf5,%xmm3,%xmm3
  xorps  %xmm9,%xmm9
  subps  %xmm3,%xmm9
  addsubps %xmm9,%xmm8
  movaps %xmm8,%xmm3
  movaps %xmm0,%xmm8
  shufps $0x44,%xmm8,%xmm8
  xorps  %xmm9,%xmm9
  movaps %xmm0,%xmm10
  shufps $0xe,%xmm9,%xmm10
  movaps %xmm0,%xmm11
  shufps $0xe0,%xmm11,%xmm9
  addps  %xmm8,%xmm10
  subps  %xmm9,%xmm10
  movaps %xmm10,%xmm0
  movaps %xmm1,%xmm8
  shufps $0x44,%xmm8,%xmm8
  xorps  %xmm9,%xmm9
  movaps %xmm1,%xmm10
  shufps $0xe,%xmm9,%xmm10
  movaps %xmm1,%xmm11
  shufps $0xe0,%xmm11,%xmm9
  addps  %xmm8,%xmm10
  subps  %xmm9,%xmm10
  movaps %xmm10,%xmm1
  movaps %xmm2,%xmm8
  shufps $0x44,%xmm8,%xmm8
  xorps  %xmm9,%xmm9
  movaps %xmm2,%xmm10
  shufps $0xe,%xmm9,%xmm10
  movaps %xmm2,%xmm11
  shufps $0xe0,%xmm11,%xmm9
  addps  %xmm8,%xmm10
  subps  %xmm9,%xmm10
  movaps %xmm10,%xmm2
  movaps %xmm3,%xmm8
  shufps $0x44,%xmm8,%xmm8
  xorps  %xmm9,%xmm9
  movaps %xmm3,%xmm10
  shufps $0xe,%xmm9,%xmm10
  movaps %xmm3,%xmm11
  shufps $0xe0,%xmm11,%xmm9
  addps  %xmm8,%xmm10
  subps  %xmm9,%xmm10
  movaps %xmm10,%xmm3
  movaps %xmm0,%xmm8
  movaps %xmm0,%xmm9
  addps  %xmm1,%xmm8
  subps  %xmm1,%xmm9
  movaps %xmm2,%xmm10
  movaps %xmm2,%xmm11
  addps  %xmm3,%xmm10
  subps  %xmm3,%xmm11
  movaps %xmm8,%xmm0
  movaps %xmm8,%xmm2
  addps  %xmm10,%xmm0
  subps  %xmm10,%xmm2
  movaps %xmm9,%xmm1
  movaps %xmm9,%xmm3
  addps  %xmm11,%xmm1
  subps  %xmm11,%xmm3
  movups %xmm0,(%rax)
  movups %xmm1,(%rdx)
  movups %xmm2,(%rcx)
  movups %xmm3,(%rsi)
  addl   $0x4,-0x4(%rbp)
L10:
  cmpl   $0x3,-0x4(%rbp)
  jle    L38
  addl   $0x10,-0x8(%rbp)
L19:
  cmpl   $0xf,-0x8(%rbp)
  jle    L0
  nop
  nop
  pop    %rbp
  ret
```

assistant: ```c
void helper_float_4(float *buf) {
  for (int j = 0; j < 16; j += 16) {
    for (int k = 0; k < 4; k += 4) {
      __asm__ volatile("movups (%0), %%xmm0\n"
                       "movups (%1), %%xmm1\n"
                       "movups (%2), %%xmm2\n"
                       "movups (%3), %%xmm3\n"
                       "movaps %%xmm0, %%xmm8\n"
                       "shufps $160, %%xmm8, %%xmm8\n"
                       "shufps $245, %%xmm0, %%xmm0\n"
                       "xorps %%xmm9, %%xmm9\n"
                       "subps %%xmm0, %%xmm9\n"
                       "addsubps %%xmm9, %%xmm8\n"
                       "movaps %%xmm8, %%xmm0\n"
                       "movaps %%xmm1, %%xmm8\n"
                       "shufps $160, %%xmm8, %%xmm8\n"
                       "shufps $245, %%xmm1, %%xmm1\n"
                       "xorps %%xmm9, %%xmm9\n"
                       "subps %%xmm1, %%xmm9\n"
                       "addsubps %%xmm9, %%xmm8\n"
                       "movaps %%xmm8, %%xmm1\n"
                       "movaps %%xmm2, %%xmm8\n"
                       "shufps $160, %%xmm8, %%xmm8\n"
                       "shufps $245, %%xmm2, %%xmm2\n"
                       "xorps %%xmm9, %%xmm9\n"
                       "subps %%xmm2, %%xmm9\n"
                       "addsubps %%xmm9, %%xmm8\n"
                       "movaps %%xmm8, %%xmm2\n"
                       "movaps %%xmm3, %%xmm8\n"
                       "shufps $160, %%xmm8, %%xmm8\n"
                       "shufps $245, %%xmm3, %%xmm3\n"
                       "xorps %%xmm9, %%xmm9\n"
                       "subps %%xmm3, %%xmm9\n"
                       "addsubps %%xmm9, %%xmm8\n"
                       "movaps %%xmm8, %%xmm3\n"
                       "movaps %%xmm0, %%xmm8\n"
                       "shufps $68, %%xmm8, %%xmm8\n"
                       "xorps %%xmm9, %%xmm9\n"
                       "movaps %%xmm0, %%xmm10\n"
                       "shufps $14, %%xmm9, %%xmm10\n"
                       "movaps %%xmm0, %%xmm11\n"
                       "shufps $224, %%xmm11, %%xmm9\n"
                       "addps %%xmm8, %%xmm10\n"
                       "subps %%xmm9, %%xmm10\n"
                       "movaps %%xmm10, %%xmm0\n"
                       "movaps %%xmm1, %%xmm8\n"
                       "shufps $68, %%xmm8, %%xmm8\n"
                       "xorps %%xmm9, %%xmm9\n"
                       "movaps %%xmm1, %%xmm10\n"
                       "shufps $14, %%xmm9, %%xmm10\n"
                       "movaps %%xmm1, %%xmm11\n"
                       "shufps $224, %%xmm11, %%xmm9\n"
                       "addps %%xmm8, %%xmm10\n"
                       "subps %%xmm9, %%xmm10\n"
                       "movaps %%xmm10, %%xmm1\n"
                       "movaps %%xmm2, %%xmm8\n"
                       "shufps $68, %%xmm8, %%xmm8\n"
                       "xorps %%xmm9, %%xmm9\n"
                       "movaps %%xmm2, %%xmm10\n"
                       "shufps $14, %%xmm9, %%xmm10\n"
                       "movaps %%xmm2, %%xmm11\n"
                       "shufps $224, %%xmm11, %%xmm9\n"
                       "addps %%xmm8, %%xmm10\n"
                       "subps %%xmm9, %%xmm10\n"
                       "movaps %%xmm10, %%xmm2\n"
                       "movaps %%xmm3, %%xmm8\n"
                       "shufps $68, %%xmm8, %%xmm8\n"
                       "xorps %%xmm9, %%xmm9\n"
                       "movaps %%xmm3, %%xmm10\n"
                       "shufps $14, %%xmm9, %%xmm10\n"
                       "movaps %%xmm3, %%xmm11\n"
                       "shufps $224, %%xmm11, %%xmm9\n"
                       "addps %%xmm8, %%xmm10\n"
                       "subps %%xmm9, %%xmm10\n"
                       "movaps %%xmm10, %%xmm3\n"
                       "movaps %%xmm0, %%xmm8\n"
                       "movaps %%xmm0, %%xmm9\n"
                       "addps %%xmm1, %%xmm8\n"
                       "subps %%xmm1, %%xmm9\n"
                       "movaps %%xmm2, %%xmm10\n"
                       "movaps %%xmm2, %%xmm11\n"
                       "addps %%xmm3, %%xmm10\n"
                       "subps %%xmm3, %%xmm11\n"
                       "movaps %%xmm8, %%xmm0\n"
                       "movaps %%xmm8, %%xmm2\n"
                       "addps %%xmm10, %%xmm0\n"
                       "subps %%xmm10, %%xmm2\n"
                       "movaps %%xmm9, %%xmm1\n"
                       "movaps %%xmm9, %%xmm3\n"
                       "addps %%xmm11, %%xmm1\n"
                       "subps %%xmm11, %%xmm3\n"
                       "movups %%xmm0, (%0)\n"
                       "movups %%xmm1, (%1)\n"
                       "movups %%xmm2, (%2)\n"
                       "movups %%xmm3, (%3)\n" ::"r"(buf + j + k + 0),
                       "r"(buf + j + k + 4), "r"(buf + j + k + 8), "r"(buf + j + k + 12)
                       : "%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "%xmm6", "%xmm7", "%xmm8", "%xmm9", "%xmm10", "%xmm11", "%xmm12", "%xmm13", "%xmm14", "%xmm15", "memory");
    }
  }
}
```