// File: /workspace/github_c_makefile_star2_O0/diaxen[P]fft-garden/cp_dit_bi_L.c
// Function: fft
void
fft(unsigned N, complex double * restrict out,
    const complex double * restrict in)
{
  unsigned log2_N = 31 - clz32(N);

  /* stage 0 */
  for (unsigned j = 0, i = 0; i < N; i += 2)
    {
      unsigned i0 = cp_input_lut[i / 2];
      unsigned i1 = i0 ^ (N >> 1);

      if (sr_sched_off[j] * 2 > i)
        {
          out[i    ] = in[i0];
          out[i + 1] = in[i1];
        }
      else
        {
          complex double a = in[i0];
          complex double b = in[i1];
          out[i    ] = a + b;
          out[i + 1] = a - b;
          j++;
        }
    }

  /* stage >= 1 */
  if (log2_N > 1)
    for (unsigned s = 1; s < log2_N; s++)
      {
        unsigned c = sr_sched_cnt[s];
        for (unsigned i = 0; i < c; i++)
          {
            unsigned o = sr_sched_off[i] << (s + 1);
            unsigned t = log2_N - s - 1;
            unsigned os = 1 << (s - 1);
            unsigned k;

            for (k = 0; k < os; k++)
              cp_dit_bf(os, out + o + k, get_twiddle(k << t, log2_N));
          }
      }
}

// Assembly:
pushq %rbp
movq %rsp, %rbp
subq $0x90, %rsp
movl %edi, -0x4(%rbp)
movq %rsi, -0x10(%rbp)
movq %rdx, -0x18(%rbp)
movl -0x4(%rbp), %eax
bsrl %eax, %ecx
xorl $0x1f, %ecx
movl $0x1f, %eax
subl %ecx, %eax
movl %eax, -0x1c(%rbp)
movl $0x0, -0x20(%rbp)
movl $0x0, -0x24(%rbp)
movl -0x24(%rbp), %eax
cmpl -0x4(%rbp), %eax
jae 0x1ffa
leaq 0x31ee(%rip), %rax      # 0x5088
movq (%rax), %rax
movl -0x24(%rbp), %ecx
shrl %ecx
movl %ecx, %ecx
movl (%rax,%rcx,4), %eax
movl %eax, -0x28(%rbp)
movl -0x28(%rbp), %eax
movl -0x4(%rbp), %ecx
shrl %ecx
xorl %ecx, %eax
movl %eax, -0x2c(%rbp)
leaq 0x31e2(%rip), %rax      # 0x50a0
movq (%rax), %rax
movl -0x20(%rbp), %ecx
movl (%rax,%rcx,4), %eax
shll %eax
cmpl -0x24(%rbp), %eax
jbe 0x1f34
movq -0x18(%rbp), %rax
movl -0x28(%rbp), %ecx
shlq $0x4, %rcx
addq %rcx, %rax
movsd (%rax), %xmm1
movsd 0x8(%rax), %xmm0
movq -0x10(%rbp), %rax
movl -0x24(%rbp), %ecx
shlq $0x4, %rcx
addq %rcx, %rax
movsd %xmm1, (%rax)
movsd %xmm0, 0x8(%rax)
movq -0x18(%rbp), %rax
movl -0x2c(%rbp), %ecx
shlq $0x4, %rcx
addq %rcx, %rax
movsd (%rax), %xmm1
movsd 0x8(%rax), %xmm0
movq -0x10(%rbp), %rax
movl -0x24(%rbp), %ecx
addl $0x1, %ecx
movl %ecx, %ecx
shlq $0x4, %rcx
addq %rcx, %rax
movsd %xmm1, (%rax)
movsd %xmm0, 0x8(%rax)
jmp 0x1fea
movq -0x18(%rbp), %rax
movl -0x28(%rbp), %ecx
shlq $0x4, %rcx
addq %rcx, %rax
movsd (%rax), %xmm1
movsd 0x8(%rax), %xmm0
movsd %xmm1, -0x40(%rbp)
movsd %xmm0, -0x38(%rbp)
movq -0x18(%rbp), %rax
movl -0x2c(%rbp), %ecx
shlq $0x4, %rcx
addq %rcx, %rax
movsd (%rax), %xmm1
movsd 0x8(%rax), %xmm0
movsd %xmm1, -0x50(%rbp)
movsd %xmm0, -0x48(%rbp)
movsd -0x40(%rbp), %xmm1
movsd -0x38(%rbp), %xmm0
movsd -0x50(%rbp), %xmm3
movsd -0x48(%rbp), %xmm2
addsd %xmm3, %xmm1
addsd %xmm2, %xmm0
movq -0x10(%rbp), %rax
movl -0x24(%rbp), %ecx
shlq $0x4, %rcx
addq %rcx, %rax
movsd %xmm1, (%rax)
movsd %xmm0, 0x8(%rax)
movsd -0x40(%rbp), %xmm1
movsd -0x38(%rbp), %xmm0
movsd -0x50(%rbp), %xmm3
movsd -0x48(%rbp), %xmm2
subsd %xmm3, %xmm1
subsd %xmm2, %xmm0
movq -0x10(%rbp), %rax
movl -0x24(%rbp), %ecx
addl $0x1, %ecx
movl %ecx, %ecx
shlq $0x4, %rcx
addq %rcx, %rax
movsd %xmm1, (%rax)
movsd %xmm0, 0x8(%rax)
movl -0x20(%rbp), %eax
addl $0x1, %eax
movl %eax, -0x20(%rbp)
jmp 0x1fec
movl -0x24(%rbp), %eax
addl $0x2, %eax
movl %eax, -0x24(%rbp)
jmp 0x1e87
cmpl $0x1, -0x1c(%rbp)
jbe 0x210e
movl $0x1, -0x54(%rbp)
movl -0x54(%rbp), %eax
cmpl -0x1c(%rbp), %eax
jae 0x210c
leaq 0x307a(%rip), %rax      # 0x5098
movq (%rax), %rax
movl -0x54(%rbp), %ecx
movl (%rax,%rcx,4), %eax
movl %eax, -0x58(%rbp)
movl $0x0, -0x5c(%rbp)
movl -0x5c(%rbp), %eax
cmpl -0x58(%rbp), %eax
jae 0x20fc
leaq 0x305c(%rip), %rax      # 0x50a0
movq (%rax), %rax
movl -0x5c(%rbp), %ecx
movl (%rax,%rcx,4), %eax
movl -0x54(%rbp), %ecx
addl $0x1, %ecx
shll %cl, %eax
movl %eax, -0x60(%rbp)
movl -0x1c(%rbp), %eax
subl -0x54(%rbp), %eax
subl $0x1, %eax
movl %eax, -0x64(%rbp)
movl -0x54(%rbp), %ecx
subl $0x1, %ecx
movl $0x1, %eax
shll %cl, %eax
movl %eax, -0x68(%rbp)
movl $0x0, -0x6c(%rbp)
movl -0x6c(%rbp), %eax
cmpl -0x68(%rbp), %eax
jae 0x20ec
movl -0x68(%rbp), %eax
movl %eax, -0x8c(%rbp)
movq -0x10(%rbp), %rax
movl -0x60(%rbp), %ecx
shlq $0x4, %rcx
addq %rcx, %rax
movl -0x6c(%rbp), %ecx
shlq $0x4, %rcx
addq %rcx, %rax
movq %rax, -0x88(%rbp)
movl -0x6c(%rbp), %edi
movl -0x64(%rbp), %ecx
shll %cl, %edi
movl -0x1c(%rbp), %esi
callq 0x2c70
movl -0x8c(%rbp), %edi
movq -0x88(%rbp), %rsi
movsd %xmm0, -0x80(%rbp)
movsd %xmm1, -0x78(%rbp)
movsd -0x80(%rbp), %xmm0
movsd -0x78(%rbp), %xmm1
callq 0x2120
movl -0x6c(%rbp), %eax
addl $0x1, %eax
movl %eax, -0x6c(%rbp)
jmp 0x207b
jmp 0x20ee
movl -0x5c(%rbp), %eax
addl $0x1, %eax
movl %eax, -0x5c(%rbp)
jmp 0x2031
jmp 0x20fe
movl -0x54(%rbp), %eax
addl $0x1, %eax
movl %eax, -0x54(%rbp)
jmp 0x200b
jmp 0x210e
addq $0x90, %rsp
popq %rbp
retq
nopw (%rax,%rax)