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//
// Copyright 2011-2014 Ettus Research LLC
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
#include "convert_common.hpp"
#include <uhd/utils/byteswap.hpp>
#include <arm_neon.h>
extern "C" {
void neon_item32_sc16_swap_16n(void *, void *, int iter);
}
static const int SIMD_WIDTH = 16;
using namespace uhd::convert;
DECLARE_CONVERTER(fc32, 1, sc16_item32_le, 1, PRIORITY_SIMD){
const fc32_t *input = reinterpret_cast<const fc32_t *>(inputs[0]);
item32_t *output = reinterpret_cast<item32_t *>(outputs[0]);
size_t i;
float32x4_t Q0 = vdupq_n_f32(float(scale_factor));
for (i=0; i < (nsamps & ~0x03); i+=2) {
float32x4_t Q1 = vld1q_f32(reinterpret_cast<const float *>(&input[i]));
float32x4_t Q2 = vmulq_f32(Q1, Q0);
int32x4_t Q3 = vcvtq_s32_f32(Q2);
int16x4_t D8 = vmovn_s32(Q3);
int16x4_t D9 = vrev32_s16(D8);
vst1_s16((reinterpret_cast<int16_t *>(&output[i])), D9);
}
xx_to_item32_sc16<uhd::htowx>(input+i, output+i, nsamps-i, scale_factor);
}
DECLARE_CONVERTER(sc16_item32_le, 1, fc32, 1, PRIORITY_SIMD){
const item32_t *input = reinterpret_cast<const item32_t *>(inputs[0]);
fc32_t *output = reinterpret_cast<fc32_t *>(outputs[0]);
size_t i;
float32x4_t Q1 = vdupq_n_f32(float(scale_factor));
for (i=0; i < (nsamps & ~0x03); i+=2) {
int16x4_t D0 = vld1_s16(reinterpret_cast<const int16_t *>(&input[i]));
int16x4_t D1 = vrev32_s16(D0);
int32x4_t Q2 = vmovl_s16(D1);
float32x4_t Q3 = vcvtq_f32_s32(Q2);
float32x4_t Q4 = vmulq_f32(Q3, Q1);
vst1q_f32((reinterpret_cast<float *>(&output[i])), Q4);
}
item32_sc16_to_xx<uhd::htowx>(input+i, output+i, nsamps-i, scale_factor);
}
DECLARE_CONVERTER(sc16, 1, sc16_item32_le, 1, PRIORITY_SIMD){
const sc16_t *input = reinterpret_cast<const sc16_t *>(inputs[0]);
item32_t *output = reinterpret_cast<item32_t *>(outputs[0]);
size_t i = nsamps / SIMD_WIDTH;
if (i)
neon_item32_sc16_swap_16n((void *) input, (void *) output, i);
i *= SIMD_WIDTH;
xx_to_item32_sc16<uhd::htowx>(input+i, output+i, nsamps-i, scale_factor);
}
DECLARE_CONVERTER(sc16_item32_le, 1, sc16, 1, PRIORITY_SIMD){
const item32_t *input = reinterpret_cast<const item32_t *>(inputs[0]);
sc16_t *output = reinterpret_cast<sc16_t *>(outputs[0]);
size_t i = nsamps / SIMD_WIDTH;
if (i)
neon_item32_sc16_swap_16n((void *) input, (void *) output, i);
i *= SIMD_WIDTH;
item32_sc16_to_xx<uhd::wtohx>(input+i, output+i, nsamps-i, scale_factor);
}
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