// File: /workspace/github_c_makefile_star2_O0/diaxen[P]fft-garden/sr_dit_bi_G_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, is = 0; is < N; is += 2)
    {
      unsigned i0 = sr_input_lut[is / 2];

      if (sr_sched_off[j] * 2 > is)
        {
          out[is    ] = in[i0];
          out[is + 1] = in[i0 + N / 2];
        }
      else
        {
          ct_dit_bf2_0(1, N / 2, out + is, in + i0);
          j++;
        }
    }

  /* stage >= 2 */
  if (log2_N > 1)
    for (unsigned k = 1; k < log2_N; k++)
      {
        unsigned t = log2_N - k - 1;
        unsigned n2 = 1 << (k - 1);

        for (unsigned j0 = 0; j0 < n2; j0++)
          {
            complex double w1 = get_twiddle(j0 << t, log2_N);
            complex double w3 = get_twiddle_sr(j0 << t, log2_N);

            unsigned c = sr_sched_cnt[k];
            for (unsigned i = 0; i < c; i++)
              {
                unsigned o = sr_sched_off[i] << (k + 1);
                sr_dit_bf4(n2, out + o + j0, w1, w3);
              }
          }
      }
}

// 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 0x1f71
leaq 0x41f6(%rip), %rax      # 0x6090
movq (%rax), %rax
movl -0x24(%rbp), %ecx
shrl %ecx
movl %ecx, %ecx
movl (%rax,%rcx,4), %eax
movl %eax, -0x28(%rbp)
leaq 0x41ef(%rip), %rax      # 0x60a0
movq (%rax), %rax
movl -0x20(%rbp), %ecx
movl (%rax,%rcx,4), %eax
shll %eax
cmpl -0x24(%rbp), %eax
jbe 0x1f2d
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 -0x28(%rbp), %ecx
movl -0x4(%rbp), %edx
shrl %edx
addl %edx, %ecx
movl %ecx, %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 0x1f61
movl -0x4(%rbp), %esi
shrl %esi
movq -0x10(%rbp), %rdx
movl -0x24(%rbp), %eax
shlq $0x4, %rax
addq %rax, %rdx
movq -0x18(%rbp), %rcx
movl -0x28(%rbp), %eax
shlq $0x4, %rax
addq %rax, %rcx
movl $0x1, %edi
callq 0x20d0
movl -0x20(%rbp), %eax
addl $0x1, %eax
movl %eax, -0x20(%rbp)
jmp 0x1f63
movl -0x24(%rbp), %eax
addl $0x2, %eax
movl %eax, -0x24(%rbp)
jmp 0x1e87
cmpl $0x1, -0x1c(%rbp)
jbe 0x20c4
movl $0x1, -0x2c(%rbp)
movl -0x2c(%rbp), %eax
cmpl -0x1c(%rbp), %eax
jae 0x20c2
movl -0x1c(%rbp), %eax
subl -0x2c(%rbp), %eax
subl $0x1, %eax
movl %eax, -0x30(%rbp)
movl -0x2c(%rbp), %ecx
subl $0x1, %ecx
movl $0x1, %eax
shll %cl, %eax
movl %eax, -0x34(%rbp)
movl $0x0, -0x38(%rbp)
movl -0x38(%rbp), %eax
cmpl -0x34(%rbp), %eax
jae 0x20b2
movl -0x38(%rbp), %edi
movl -0x30(%rbp), %ecx
shll %cl, %edi
movl -0x1c(%rbp), %esi
callq 0x2180
movsd %xmm0, -0x48(%rbp)
movsd %xmm1, -0x40(%rbp)
movl -0x38(%rbp), %edi
movl -0x30(%rbp), %ecx
shll %cl, %edi
movl -0x1c(%rbp), %esi
callq 0x21c0
movsd %xmm0, -0x58(%rbp)
movsd %xmm1, -0x50(%rbp)
leaq 0x40a0(%rip), %rax      # 0x6098
movq (%rax), %rax
movl -0x2c(%rbp), %ecx
movl (%rax,%rcx,4), %eax
movl %eax, -0x5c(%rbp)
movl $0x0, -0x60(%rbp)
movl -0x60(%rbp), %eax
cmpl -0x5c(%rbp), %eax
jae 0x20a2
leaq 0x4082(%rip), %rax      # 0x60a0
movq (%rax), %rax
movl -0x60(%rbp), %ecx
movl (%rax,%rcx,4), %eax
movl -0x2c(%rbp), %ecx
addl $0x1, %ecx
shll %cl, %eax
movl %eax, -0x64(%rbp)
movl -0x34(%rbp), %edi
movq -0x10(%rbp), %rsi
movl -0x64(%rbp), %eax
shlq $0x4, %rax
addq %rax, %rsi
movl -0x38(%rbp), %eax
shlq $0x4, %rax
addq %rax, %rsi
movsd -0x48(%rbp), %xmm1
movsd -0x40(%rbp), %xmm0
movsd -0x58(%rbp), %xmm3
movsd -0x50(%rbp), %xmm2
movsd %xmm1, -0x78(%rbp)
movsd %xmm0, -0x70(%rbp)
movsd -0x78(%rbp), %xmm0
movsd -0x70(%rbp), %xmm1
movsd %xmm3, -0x88(%rbp)
movsd %xmm2, -0x80(%rbp)
movsd -0x88(%rbp), %xmm2
movsd -0x80(%rbp), %xmm3
callq 0x2200
movl -0x60(%rbp), %eax
addl $0x1, %eax
movl %eax, -0x60(%rbp)
jmp 0x200b
jmp 0x20a4
movl -0x38(%rbp), %eax
addl $0x1, %eax
movl %eax, -0x38(%rbp)
jmp 0x1fb1
jmp 0x20b4
movl -0x2c(%rbp), %eax
addl $0x1, %eax
movl %eax, -0x2c(%rbp)
jmp 0x1f82
jmp 0x20c4
addq $0x90, %rsp
popq %rbp
retq
nopl (%rax)