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// Auto-generated file. Do not edit!
// Template: src/cs16-bfly4/scalar.c.in
// Generator: tools/xngen
//
// Copyright 2022 Google LLC
//
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree.
#include <assert.h>
#include <stddef.h>
#include <stdint.h>
#include <xnnpack/math.h>
#include <xnnpack/fft.h>
void xnn_cs16_bfly4_ukernel__scalar_x3(
size_t samples,
int16_t* data,
const size_t stride,
const int16_t* twiddle) {
const int16_t* tw1 = twiddle;
const int16_t* tw2 = tw1;
const int16_t* tw3 = tw1;
int16_t* out0 = data;
int16_t* out1 = data + samples * 2;
int16_t* out2 = data + samples * 4;
int16_t* out3 = data + samples * 6;
assert(samples != 0);
assert(stride != 0);
assert(twiddle != NULL);
assert(data != NULL);
for (; samples >= 3; samples -= 3) {
int32_t vout0r0 = (int32_t) out0[0];
int32_t vout0i0 = (int32_t) out0[1];
int32_t vout0r1 = (int32_t) out0[2];
int32_t vout0i1 = (int32_t) out0[3];
int32_t vout0r2 = (int32_t) out0[4];
int32_t vout0i2 = (int32_t) out0[5];
int32_t vout1r0 = (int32_t) out1[0];
int32_t vout1i0 = (int32_t) out1[1];
int32_t vout1r1 = (int32_t) out1[2];
int32_t vout1i1 = (int32_t) out1[3];
int32_t vout1r2 = (int32_t) out1[4];
int32_t vout1i2 = (int32_t) out1[5];
int32_t vout2r0 = (int32_t) out2[0];
int32_t vout2i0 = (int32_t) out2[1];
int32_t vout2r1 = (int32_t) out2[2];
int32_t vout2i1 = (int32_t) out2[3];
int32_t vout2r2 = (int32_t) out2[4];
int32_t vout2i2 = (int32_t) out2[5];
int32_t vout3r0 = (int32_t) out3[0];
int32_t vout3i0 = (int32_t) out3[1];
int32_t vout3r1 = (int32_t) out3[2];
int32_t vout3i1 = (int32_t) out3[3];
int32_t vout3r2 = (int32_t) out3[4];
int32_t vout3i2 = (int32_t) out3[5];
const int32_t vtw1r0 = (const int32_t) tw1[0];
const int32_t vtw1i0 = (const int32_t) tw1[1];
tw1 += stride * 2;
const int32_t vtw1r1 = (const int32_t) tw1[0];
const int32_t vtw1i1 = (const int32_t) tw1[1];
tw1 += stride * 2;
const int32_t vtw1r2 = (const int32_t) tw1[0];
const int32_t vtw1i2 = (const int32_t) tw1[1];
tw1 += stride * 2;
const int32_t vtw2r0 = (const int32_t) tw2[0];
const int32_t vtw2i0 = (const int32_t) tw2[1];
tw2 += stride * 4;
const int32_t vtw2r1 = (const int32_t) tw2[0];
const int32_t vtw2i1 = (const int32_t) tw2[1];
tw2 += stride * 4;
const int32_t vtw2r2 = (const int32_t) tw2[0];
const int32_t vtw2i2 = (const int32_t) tw2[1];
tw2 += stride * 4;
const int32_t vtw3r0 = (const int32_t) tw3[0];
const int32_t vtw3i0 = (const int32_t) tw3[1];
tw3 += stride * 6;
const int32_t vtw3r1 = (const int32_t) tw3[0];
const int32_t vtw3i1 = (const int32_t) tw3[1];
tw3 += stride * 6;
const int32_t vtw3r2 = (const int32_t) tw3[0];
const int32_t vtw3i2 = (const int32_t) tw3[1];
tw3 += stride * 6;
// Note 32767 / 4 = 8191. Should be 8192.
vout0r0 = math_asr_s32(vout0r0 * 8191 + 16384, 15);
vout0r1 = math_asr_s32(vout0r1 * 8191 + 16384, 15);
vout0r2 = math_asr_s32(vout0r2 * 8191 + 16384, 15);
vout0i0 = math_asr_s32(vout0i0 * 8191 + 16384, 15);
vout0i1 = math_asr_s32(vout0i1 * 8191 + 16384, 15);
vout0i2 = math_asr_s32(vout0i2 * 8191 + 16384, 15);
vout1r0 = math_asr_s32(vout1r0 * 8191 + 16384, 15);
vout1r1 = math_asr_s32(vout1r1 * 8191 + 16384, 15);
vout1r2 = math_asr_s32(vout1r2 * 8191 + 16384, 15);
vout1i0 = math_asr_s32(vout1i0 * 8191 + 16384, 15);
vout1i1 = math_asr_s32(vout1i1 * 8191 + 16384, 15);
vout1i2 = math_asr_s32(vout1i2 * 8191 + 16384, 15);
vout2r0 = math_asr_s32(vout2r0 * 8191 + 16384, 15);
vout2r1 = math_asr_s32(vout2r1 * 8191 + 16384, 15);
vout2r2 = math_asr_s32(vout2r2 * 8191 + 16384, 15);
vout2i0 = math_asr_s32(vout2i0 * 8191 + 16384, 15);
vout2i1 = math_asr_s32(vout2i1 * 8191 + 16384, 15);
vout2i2 = math_asr_s32(vout2i2 * 8191 + 16384, 15);
vout3r0 = math_asr_s32(vout3r0 * 8191 + 16384, 15);
vout3r1 = math_asr_s32(vout3r1 * 8191 + 16384, 15);
vout3r2 = math_asr_s32(vout3r2 * 8191 + 16384, 15);
vout3i0 = math_asr_s32(vout3i0 * 8191 + 16384, 15);
vout3i1 = math_asr_s32(vout3i1 * 8191 + 16384, 15);
vout3i2 = math_asr_s32(vout3i2 * 8191 + 16384, 15);
const int32_t vtmp0r0 = math_asr_s32(vout1r0 * vtw1r0 - vout1i0 * vtw1i0 + 16384, 15);
const int32_t vtmp0r1 = math_asr_s32(vout1r1 * vtw1r1 - vout1i1 * vtw1i1 + 16384, 15);
const int32_t vtmp0r2 = math_asr_s32(vout1r2 * vtw1r2 - vout1i2 * vtw1i2 + 16384, 15);
const int32_t vtmp0i0 = math_asr_s32(vout1r0 * vtw1i0 + vout1i0 * vtw1r0 + 16384, 15);
const int32_t vtmp0i1 = math_asr_s32(vout1r1 * vtw1i1 + vout1i1 * vtw1r1 + 16384, 15);
const int32_t vtmp0i2 = math_asr_s32(vout1r2 * vtw1i2 + vout1i2 * vtw1r2 + 16384, 15);
const int32_t vtmp1r0 = math_asr_s32(vout2r0 * vtw2r0 - vout2i0 * vtw2i0 + 16384, 15);
const int32_t vtmp1r1 = math_asr_s32(vout2r1 * vtw2r1 - vout2i1 * vtw2i1 + 16384, 15);
const int32_t vtmp1r2 = math_asr_s32(vout2r2 * vtw2r2 - vout2i2 * vtw2i2 + 16384, 15);
const int32_t vtmp1i0 = math_asr_s32(vout2r0 * vtw2i0 + vout2i0 * vtw2r0 + 16384, 15);
const int32_t vtmp1i1 = math_asr_s32(vout2r1 * vtw2i1 + vout2i1 * vtw2r1 + 16384, 15);
const int32_t vtmp1i2 = math_asr_s32(vout2r2 * vtw2i2 + vout2i2 * vtw2r2 + 16384, 15);
const int32_t vtmp2r0 = math_asr_s32(vout3r0 * vtw3r0 - vout3i0 * vtw3i0 + 16384, 15);
const int32_t vtmp2r1 = math_asr_s32(vout3r1 * vtw3r1 - vout3i1 * vtw3i1 + 16384, 15);
const int32_t vtmp2r2 = math_asr_s32(vout3r2 * vtw3r2 - vout3i2 * vtw3i2 + 16384, 15);
const int32_t vtmp2i0 = math_asr_s32(vout3r0 * vtw3i0 + vout3i0 * vtw3r0 + 16384, 15);
const int32_t vtmp2i1 = math_asr_s32(vout3r1 * vtw3i1 + vout3i1 * vtw3r1 + 16384, 15);
const int32_t vtmp2i2 = math_asr_s32(vout3r2 * vtw3i2 + vout3i2 * vtw3r2 + 16384, 15);
const int32_t vtmp5r0 = vout0r0 - vtmp1r0;
const int32_t vtmp5r1 = vout0r1 - vtmp1r1;
const int32_t vtmp5r2 = vout0r2 - vtmp1r2;
const int32_t vtmp5i0 = vout0i0 - vtmp1i0;
const int32_t vtmp5i1 = vout0i1 - vtmp1i1;
const int32_t vtmp5i2 = vout0i2 - vtmp1i2;
vout0r0 += vtmp1r0;
vout0r1 += vtmp1r1;
vout0r2 += vtmp1r2;
vout0i0 += vtmp1i0;
vout0i1 += vtmp1i1;
vout0i2 += vtmp1i2;
const int32_t vtmp3r0 = vtmp0r0 + vtmp2r0;
const int32_t vtmp3r1 = vtmp0r1 + vtmp2r1;
const int32_t vtmp3r2 = vtmp0r2 + vtmp2r2;
const int32_t vtmp3i0 = vtmp0i0 + vtmp2i0;
const int32_t vtmp3i1 = vtmp0i1 + vtmp2i1;
const int32_t vtmp3i2 = vtmp0i2 + vtmp2i2;
const int32_t vtmp4r0 = vtmp0r0 - vtmp2r0;
const int32_t vtmp4r1 = vtmp0r1 - vtmp2r1;
const int32_t vtmp4r2 = vtmp0r2 - vtmp2r2;
const int32_t vtmp4i0 = vtmp0i0 - vtmp2i0;
const int32_t vtmp4i1 = vtmp0i1 - vtmp2i1;
const int32_t vtmp4i2 = vtmp0i2 - vtmp2i2;
vout2r0 = vout0r0 - vtmp3r0;
vout2r1 = vout0r1 - vtmp3r1;
vout2r2 = vout0r2 - vtmp3r2;
vout2i0 = vout0i0 - vtmp3i0;
vout2i1 = vout0i1 - vtmp3i1;
vout2i2 = vout0i2 - vtmp3i2;
vout0r0 += vtmp3r0;
vout0r1 += vtmp3r1;
vout0r2 += vtmp3r2;
vout0i0 += vtmp3i0;
vout0i1 += vtmp3i1;
vout0i2 += vtmp3i2;
vout1r0 = vtmp5r0 + vtmp4i0;
vout1r1 = vtmp5r1 + vtmp4i1;
vout1r2 = vtmp5r2 + vtmp4i2;
vout1i0 = vtmp5i0 - vtmp4r0;
vout1i1 = vtmp5i1 - vtmp4r1;
vout1i2 = vtmp5i2 - vtmp4r2;
vout3r0 = vtmp5r0 - vtmp4i0;
vout3r1 = vtmp5r1 - vtmp4i1;
vout3r2 = vtmp5r2 - vtmp4i2;
vout3i0 = vtmp5i0 + vtmp4r0;
vout3i1 = vtmp5i1 + vtmp4r1;
vout3i2 = vtmp5i2 + vtmp4r2;
out0[0] = (int16_t) vout0r0;
out0[1] = (int16_t) vout0i0;
out0[2] = (int16_t) vout0r1;
out0[3] = (int16_t) vout0i1;
out0[4] = (int16_t) vout0r2;
out0[5] = (int16_t) vout0i2;
out0 += 3 * 2;
out1[0] = (int16_t) vout1r0;
out1[1] = (int16_t) vout1i0;
out1[2] = (int16_t) vout1r1;
out1[3] = (int16_t) vout1i1;
out1[4] = (int16_t) vout1r2;
out1[5] = (int16_t) vout1i2;
out1 += 3 * 2;
out2[0] = (int16_t) vout2r0;
out2[1] = (int16_t) vout2i0;
out2[2] = (int16_t) vout2r1;
out2[3] = (int16_t) vout2i1;
out2[4] = (int16_t) vout2r2;
out2[5] = (int16_t) vout2i2;
out2 += 3 * 2;
out3[0] = (int16_t) vout3r0;
out3[1] = (int16_t) vout3i0;
out3[2] = (int16_t) vout3r1;
out3[3] = (int16_t) vout3i1;
out3[4] = (int16_t) vout3r2;
out3[5] = (int16_t) vout3i2;
out3 += 3 * 2;
}
if XNN_UNLIKELY(samples != 0) {
do {
int32_t vout0r = (int32_t) out0[0];
int32_t vout0i = (int32_t) out0[1];
int32_t vout1r = (int32_t) out1[0];
int32_t vout1i = (int32_t) out1[1];
int32_t vout2r = (int32_t) out2[0];
int32_t vout2i = (int32_t) out2[1];
int32_t vout3r = (int32_t) out3[0];
int32_t vout3i = (int32_t) out3[1];
const int32_t vtw1r = (const int32_t) tw1[0];
const int32_t vtw1i = (const int32_t) tw1[1];
const int32_t vtw2r = (const int32_t) tw2[0];
const int32_t vtw2i = (const int32_t) tw2[1];
const int32_t vtw3r = (const int32_t) tw3[0];
const int32_t vtw3i = (const int32_t) tw3[1];
tw1 += stride * 2;
tw2 += stride * 4;
tw3 += stride * 6;
// Note 32767 / 4 = 8191. Should be 8192.
vout0r = math_asr_s32(vout0r * 8191 + 16384, 15);
vout0i = math_asr_s32(vout0i * 8191 + 16384, 15);
vout1r = math_asr_s32(vout1r * 8191 + 16384, 15);
vout1i = math_asr_s32(vout1i * 8191 + 16384, 15);
vout2r = math_asr_s32(vout2r * 8191 + 16384, 15);
vout2i = math_asr_s32(vout2i * 8191 + 16384, 15);
vout3r = math_asr_s32(vout3r * 8191 + 16384, 15);
vout3i = math_asr_s32(vout3i * 8191 + 16384, 15);
const int32_t vtmp0r = math_asr_s32(vout1r * vtw1r - vout1i * vtw1i + 16384, 15);
const int32_t vtmp0i = math_asr_s32(vout1r * vtw1i + vout1i * vtw1r + 16384, 15);
const int32_t vtmp1r = math_asr_s32(vout2r * vtw2r - vout2i * vtw2i + 16384, 15);
const int32_t vtmp1i = math_asr_s32(vout2r * vtw2i + vout2i * vtw2r + 16384, 15);
const int32_t vtmp2r = math_asr_s32(vout3r * vtw3r - vout3i * vtw3i + 16384, 15);
const int32_t vtmp2i = math_asr_s32(vout3r * vtw3i + vout3i * vtw3r + 16384, 15);
const int32_t vtmp5r = vout0r - vtmp1r;
const int32_t vtmp5i = vout0i - vtmp1i;
vout0r += vtmp1r;
vout0i += vtmp1i;
const int32_t vtmp3r = vtmp0r + vtmp2r;
const int32_t vtmp3i = vtmp0i + vtmp2i;
const int32_t vtmp4r = vtmp0r - vtmp2r;
const int32_t vtmp4i = vtmp0i - vtmp2i;
vout2r = vout0r - vtmp3r;
vout2i = vout0i - vtmp3i;
vout0r += vtmp3r;
vout0i += vtmp3i;
vout1r = vtmp5r + vtmp4i;
vout1i = vtmp5i - vtmp4r;
vout3r = vtmp5r - vtmp4i;
vout3i = vtmp5i + vtmp4r;
out0[0] = (int16_t) vout0r;
out0[1] = (int16_t) vout0i;
out1[0] = (int16_t) vout1r;
out1[1] = (int16_t) vout1i;
out2[0] = (int16_t) vout2r;
out2[1] = (int16_t) vout2i;
out3[0] = (int16_t) vout3r;
out3[1] = (int16_t) vout3i;
out0 += 2;
out1 += 2;
out2 += 2;
out3 += 2;
} while(--samples != 0);
}
}
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