Loading...
Searching...
No Matches
volk_16ic_magnitude_16i.h
Go to the documentation of this file.
/* -*- c++ -*- */
/*
* Copyright 2012, 2014 Free Software Foundation, Inc.
*
* This file is part of VOLK
*
* SPDX-License-Identifier: LGPL-3.0-or-later
*/
#ifndef INCLUDED_volk_16ic_magnitude_16i_a_H
#define INCLUDED_volk_16ic_magnitude_16i_a_H
#include <inttypes.h>
#include <limits.h>
#include <math.h>
#include <stdio.h>
#include <volk/volk_common.h>
#ifdef LV_HAVE_AVX2
#include <immintrin.h>
static inline void volk_16ic_magnitude_16i_a_avx2(int16_t* magnitudeVector,
const lv_16sc_t* complexVector,
unsigned int num_points)
{
unsigned int number = 0;
const unsigned int eighthPoints = num_points / 8;
const int16_t* complexVectorPtr = (const int16_t*)complexVector;
int16_t* magnitudeVectorPtr = magnitudeVector;
__m256 vScalar = _mm256_set1_ps(SHRT_MAX);
__m256 invScalar = _mm256_set1_ps(1.0f / SHRT_MAX);
__m256i int1, int2;
__m128i short1, short2;
__m256 cplxValue1, cplxValue2, result;
__m256i idx = _mm256_set_epi32(0, 0, 0, 0, 5, 1, 4, 0);
for (; number < eighthPoints; number++) {
int1 = _mm256_load_si256((__m256i*)complexVectorPtr);
complexVectorPtr += 16;
short1 = _mm256_extracti128_si256(int1, 0);
short2 = _mm256_extracti128_si256(int1, 1);
int1 = _mm256_cvtepi16_epi32(short1);
int2 = _mm256_cvtepi16_epi32(short2);
cplxValue1 = _mm256_cvtepi32_ps(int1);
cplxValue2 = _mm256_cvtepi32_ps(int2);
cplxValue1 = _mm256_mul_ps(cplxValue1, invScalar);
cplxValue2 = _mm256_mul_ps(cplxValue2, invScalar);
cplxValue1 = _mm256_mul_ps(cplxValue1, cplxValue1); // Square the values
cplxValue2 = _mm256_mul_ps(cplxValue2, cplxValue2); // Square the Values
result = _mm256_hadd_ps(cplxValue1, cplxValue2); // Add the I2 and Q2 values
result = _mm256_sqrt_ps(result); // Square root the values
result = _mm256_mul_ps(result, vScalar); // Scale the results
int1 = _mm256_cvtps_epi32(result);
int1 = _mm256_packs_epi32(int1, int1);
int1 = _mm256_permutevar8x32_epi32(
int1, idx); // permute to compensate for shuffling in hadd and packs
short1 = _mm256_extracti128_si256(int1, 0);
_mm_store_si128((__m128i*)magnitudeVectorPtr, short1);
magnitudeVectorPtr += 8;
}
number = eighthPoints * 8;
magnitudeVectorPtr = &magnitudeVector[number];
complexVectorPtr = (const int16_t*)&complexVector[number];
for (; number < num_points; number++) {
const float val1Real = (float)(*complexVectorPtr++) / SHRT_MAX;
const float val1Imag = (float)(*complexVectorPtr++) / SHRT_MAX;
const float val1Result =
sqrtf((val1Real * val1Real) + (val1Imag * val1Imag)) * SHRT_MAX;
*magnitudeVectorPtr++ = (int16_t)rintf(val1Result);
}
}
#endif /* LV_HAVE_AVX2 */
#ifdef LV_HAVE_SSE3
#include <pmmintrin.h>
static inline void volk_16ic_magnitude_16i_a_sse3(int16_t* magnitudeVector,
const lv_16sc_t* complexVector,
unsigned int num_points)
{
unsigned int number = 0;
const unsigned int quarterPoints = num_points / 4;
const int16_t* complexVectorPtr = (const int16_t*)complexVector;
int16_t* magnitudeVectorPtr = magnitudeVector;
__m128 vScalar = _mm_set_ps1(SHRT_MAX);
__m128 invScalar = _mm_set_ps1(1.0f / SHRT_MAX);
__m128 cplxValue1, cplxValue2, result;
__VOLK_ATTR_ALIGNED(16) float inputFloatBuffer[8];
__VOLK_ATTR_ALIGNED(16) float outputFloatBuffer[4];
for (; number < quarterPoints; number++) {
inputFloatBuffer[0] = (float)(complexVectorPtr[0]);
inputFloatBuffer[1] = (float)(complexVectorPtr[1]);
inputFloatBuffer[2] = (float)(complexVectorPtr[2]);
inputFloatBuffer[3] = (float)(complexVectorPtr[3]);
inputFloatBuffer[4] = (float)(complexVectorPtr[4]);
inputFloatBuffer[5] = (float)(complexVectorPtr[5]);
inputFloatBuffer[6] = (float)(complexVectorPtr[6]);
inputFloatBuffer[7] = (float)(complexVectorPtr[7]);
cplxValue1 = _mm_load_ps(&inputFloatBuffer[0]);
cplxValue2 = _mm_load_ps(&inputFloatBuffer[4]);
complexVectorPtr += 8;
cplxValue1 = _mm_mul_ps(cplxValue1, invScalar);
cplxValue2 = _mm_mul_ps(cplxValue2, invScalar);
cplxValue1 = _mm_mul_ps(cplxValue1, cplxValue1); // Square the values
cplxValue2 = _mm_mul_ps(cplxValue2, cplxValue2); // Square the Values
result = _mm_hadd_ps(cplxValue1, cplxValue2); // Add the I2 and Q2 values
result = _mm_sqrt_ps(result); // Square root the values
result = _mm_mul_ps(result, vScalar); // Scale the results
_mm_store_ps(outputFloatBuffer, result);
*magnitudeVectorPtr++ = (int16_t)rintf(outputFloatBuffer[0]);
*magnitudeVectorPtr++ = (int16_t)rintf(outputFloatBuffer[1]);
*magnitudeVectorPtr++ = (int16_t)rintf(outputFloatBuffer[2]);
*magnitudeVectorPtr++ = (int16_t)rintf(outputFloatBuffer[3]);
}
number = quarterPoints * 4;
magnitudeVectorPtr = &magnitudeVector[number];
complexVectorPtr = (const int16_t*)&complexVector[number];
for (; number < num_points; number++) {
const float val1Real = (float)(*complexVectorPtr++) / SHRT_MAX;
const float val1Imag = (float)(*complexVectorPtr++) / SHRT_MAX;
const float val1Result =
sqrtf((val1Real * val1Real) + (val1Imag * val1Imag)) * SHRT_MAX;
*magnitudeVectorPtr++ = (int16_t)rintf(val1Result);
}
}
#endif /* LV_HAVE_SSE3 */
#ifdef LV_HAVE_SSE
#include <xmmintrin.h>
static inline void volk_16ic_magnitude_16i_a_sse(int16_t* magnitudeVector,
const lv_16sc_t* complexVector,
unsigned int num_points)
{
unsigned int number = 0;
const unsigned int quarterPoints = num_points / 4;
const int16_t* complexVectorPtr = (const int16_t*)complexVector;
int16_t* magnitudeVectorPtr = magnitudeVector;
__m128 vScalar = _mm_set_ps1(SHRT_MAX);
__m128 invScalar = _mm_set_ps1(1.0f / SHRT_MAX);
__m128 cplxValue1, cplxValue2, iValue, qValue, result;
__VOLK_ATTR_ALIGNED(16) float inputFloatBuffer[4];
__VOLK_ATTR_ALIGNED(16) float outputFloatBuffer[4];
for (; number < quarterPoints; number++) {
inputFloatBuffer[0] = (float)(complexVectorPtr[0]);
inputFloatBuffer[1] = (float)(complexVectorPtr[1]);
inputFloatBuffer[2] = (float)(complexVectorPtr[2]);
inputFloatBuffer[3] = (float)(complexVectorPtr[3]);
cplxValue1 = _mm_load_ps(inputFloatBuffer);
complexVectorPtr += 4;
inputFloatBuffer[0] = (float)(complexVectorPtr[0]);
inputFloatBuffer[1] = (float)(complexVectorPtr[1]);
inputFloatBuffer[2] = (float)(complexVectorPtr[2]);
inputFloatBuffer[3] = (float)(complexVectorPtr[3]);
cplxValue2 = _mm_load_ps(inputFloatBuffer);
complexVectorPtr += 4;
cplxValue1 = _mm_mul_ps(cplxValue1, invScalar);
cplxValue2 = _mm_mul_ps(cplxValue2, invScalar);
// Arrange in i1i2i3i4 format
iValue = _mm_shuffle_ps(cplxValue1, cplxValue2, _MM_SHUFFLE(2, 0, 2, 0));
// Arrange in q1q2q3q4 format
qValue = _mm_shuffle_ps(cplxValue1, cplxValue2, _MM_SHUFFLE(3, 1, 3, 1));
iValue = _mm_mul_ps(iValue, iValue); // Square the I values
qValue = _mm_mul_ps(qValue, qValue); // Square the Q Values
result = _mm_add_ps(iValue, qValue); // Add the I2 and Q2 values
result = _mm_sqrt_ps(result); // Square root the values
result = _mm_mul_ps(result, vScalar); // Scale the results
_mm_store_ps(outputFloatBuffer, result);
*magnitudeVectorPtr++ = (int16_t)rintf(outputFloatBuffer[0]);
*magnitudeVectorPtr++ = (int16_t)rintf(outputFloatBuffer[1]);
*magnitudeVectorPtr++ = (int16_t)rintf(outputFloatBuffer[2]);
*magnitudeVectorPtr++ = (int16_t)rintf(outputFloatBuffer[3]);
}
number = quarterPoints * 4;
magnitudeVectorPtr = &magnitudeVector[number];
complexVectorPtr = (const int16_t*)&complexVector[number];
for (; number < num_points; number++) {
const float val1Real = (float)(*complexVectorPtr++) / SHRT_MAX;
const float val1Imag = (float)(*complexVectorPtr++) / SHRT_MAX;
const float val1Result =
sqrtf((val1Real * val1Real) + (val1Imag * val1Imag)) * SHRT_MAX;
*magnitudeVectorPtr++ = (int16_t)rintf(val1Result);
}
}
#endif /* LV_HAVE_SSE */
#ifdef LV_HAVE_GENERIC
static inline void volk_16ic_magnitude_16i_generic(int16_t* magnitudeVector,
const lv_16sc_t* complexVector,
unsigned int num_points)
{
const int16_t* complexVectorPtr = (const int16_t*)complexVector;
int16_t* magnitudeVectorPtr = magnitudeVector;
unsigned int number = 0;
const float scalar = SHRT_MAX;
for (number = 0; number < num_points; number++) {
float real = ((float)(*complexVectorPtr++)) / scalar;
float imag = ((float)(*complexVectorPtr++)) / scalar;
*magnitudeVectorPtr++ =
(int16_t)rintf(sqrtf((real * real) + (imag * imag)) * scalar);
}
}
#endif /* LV_HAVE_GENERIC */
#endif /* INCLUDED_volk_16ic_magnitude_16i_a_H */
#ifndef INCLUDED_volk_16ic_magnitude_16i_u_H
#define INCLUDED_volk_16ic_magnitude_16i_u_H
#include <inttypes.h>
#include <math.h>
#include <stdio.h>
#include <volk/volk_common.h>
#ifdef LV_HAVE_AVX2
#include <immintrin.h>
static inline void volk_16ic_magnitude_16i_u_avx2(int16_t* magnitudeVector,
const lv_16sc_t* complexVector,
unsigned int num_points)
{
unsigned int number = 0;
const unsigned int eighthPoints = num_points / 8;
const int16_t* complexVectorPtr = (const int16_t*)complexVector;
int16_t* magnitudeVectorPtr = magnitudeVector;
__m256 vScalar = _mm256_set1_ps(SHRT_MAX);
__m256 invScalar = _mm256_set1_ps(1.0f / SHRT_MAX);
__m256i int1, int2;
__m128i short1, short2;
__m256 cplxValue1, cplxValue2, result;
__m256i idx = _mm256_set_epi32(0, 0, 0, 0, 5, 1, 4, 0);
for (; number < eighthPoints; number++) {
int1 = _mm256_loadu_si256((__m256i*)complexVectorPtr);
complexVectorPtr += 16;
short1 = _mm256_extracti128_si256(int1, 0);
short2 = _mm256_extracti128_si256(int1, 1);
int1 = _mm256_cvtepi16_epi32(short1);
int2 = _mm256_cvtepi16_epi32(short2);
cplxValue1 = _mm256_cvtepi32_ps(int1);
cplxValue2 = _mm256_cvtepi32_ps(int2);
cplxValue1 = _mm256_mul_ps(cplxValue1, invScalar);
cplxValue2 = _mm256_mul_ps(cplxValue2, invScalar);
cplxValue1 = _mm256_mul_ps(cplxValue1, cplxValue1); // Square the values
cplxValue2 = _mm256_mul_ps(cplxValue2, cplxValue2); // Square the Values
result = _mm256_hadd_ps(cplxValue1, cplxValue2); // Add the I2 and Q2 values
result = _mm256_sqrt_ps(result); // Square root the values
result = _mm256_mul_ps(result, vScalar); // Scale the results
int1 = _mm256_cvtps_epi32(result);
int1 = _mm256_packs_epi32(int1, int1);
int1 = _mm256_permutevar8x32_epi32(
int1, idx); // permute to compensate for shuffling in hadd and packs
short1 = _mm256_extracti128_si256(int1, 0);
_mm_storeu_si128((__m128i*)magnitudeVectorPtr, short1);
magnitudeVectorPtr += 8;
}
number = eighthPoints * 8;
magnitudeVectorPtr = &magnitudeVector[number];
complexVectorPtr = (const int16_t*)&complexVector[number];
for (; number < num_points; number++) {
const float val1Real = (float)(*complexVectorPtr++) / SHRT_MAX;
const float val1Imag = (float)(*complexVectorPtr++) / SHRT_MAX;
const float val1Result =
sqrtf((val1Real * val1Real) + (val1Imag * val1Imag)) * SHRT_MAX;
*magnitudeVectorPtr++ = (int16_t)rintf(val1Result);
}
}
#endif /* LV_HAVE_AVX2 */
#ifdef LV_HAVE_NEONV7
#include <arm_neon.h>
#include <volk/volk_neon_intrinsics.h>
static inline void volk_16ic_magnitude_16i_neonv7(int16_t* magnitudeVector,
const lv_16sc_t* complexVector,
unsigned int num_points)
{
unsigned int number = 0;
unsigned int quarter_points = num_points / 4;
const float scalar = SHRT_MAX;
const float inv_scalar = 1.0f / scalar;
int16_t* magnitudeVectorPtr = magnitudeVector;
const lv_16sc_t* complexVectorPtr = complexVector;
float32x4_t mag_vec;
float32x4x2_t c_vec;
for (number = 0; number < quarter_points; number++) {
const int16x4x2_t c16_vec = vld2_s16((int16_t*)complexVectorPtr);
__VOLK_PREFETCH(complexVectorPtr + 4);
c_vec.val[0] = vcvtq_f32_s32(vmovl_s16(c16_vec.val[0]));
c_vec.val[1] = vcvtq_f32_s32(vmovl_s16(c16_vec.val[1]));
// Scale to close to 0-1
c_vec.val[0] = vmulq_n_f32(c_vec.val[0], inv_scalar);
c_vec.val[1] = vmulq_n_f32(c_vec.val[1], inv_scalar);
// vsqrtq_f32 is armv8
const float32x4_t mag_vec_squared = _vmagnitudesquaredq_f32(c_vec);
mag_vec = vmulq_f32(mag_vec_squared, _vinvsqrtq_f32(mag_vec_squared));
// Reconstruct
mag_vec = vmulq_n_f32(mag_vec, scalar);
// Add 0.5 for correct rounding because vcvtq_s32_f32 truncates.
// This works because the magnitude is always positive.
mag_vec = vaddq_f32(mag_vec, vdupq_n_f32(0.5));
const int16x4_t mag16_vec = vmovn_s32(vcvtq_s32_f32(mag_vec));
vst1_s16(magnitudeVectorPtr, mag16_vec);
// Advance pointers
magnitudeVectorPtr += 4;
complexVectorPtr += 4;
}
// Deal with the rest
for (number = quarter_points * 4; number < num_points; number++) {
const float real = lv_creal(*complexVectorPtr) * inv_scalar;
const float imag = lv_cimag(*complexVectorPtr) * inv_scalar;
*magnitudeVectorPtr =
(int16_t)rintf(sqrtf((real * real) + (imag * imag)) * scalar);
complexVectorPtr++;
magnitudeVectorPtr++;
}
}
#endif /* LV_HAVE_NEONV7 */
#ifdef LV_HAVE_NEONV8
#include <arm_neon.h>
static inline void volk_16ic_magnitude_16i_neonv8(int16_t* magnitudeVector,
const lv_16sc_t* complexVector,
unsigned int num_points)
{
unsigned int number = 0;
unsigned int quarter_points = num_points / 4;
const float scalar = SHRT_MAX;
const float inv_scalar = 1.0f / scalar;
int16_t* magnitudeVectorPtr = magnitudeVector;
const lv_16sc_t* complexVectorPtr = complexVector;
float32x4_t mag_vec, mag_sq;
float32x4x2_t c_vec;
for (number = 0; number < quarter_points; number++) {
const int16x4x2_t c16_vec = vld2_s16((int16_t*)complexVectorPtr);
__VOLK_PREFETCH(complexVectorPtr + 4);
c_vec.val[0] = vcvtq_f32_s32(vmovl_s16(c16_vec.val[0]));
c_vec.val[1] = vcvtq_f32_s32(vmovl_s16(c16_vec.val[1]));
// Scale to close to 0-1
c_vec.val[0] = vmulq_n_f32(c_vec.val[0], inv_scalar);
c_vec.val[1] = vmulq_n_f32(c_vec.val[1], inv_scalar);
// ARMv8: Use FMA for magnitude squared and native sqrt
mag_sq =
vfmaq_f32(vmulq_f32(c_vec.val[0], c_vec.val[0]), c_vec.val[1], c_vec.val[1]);
mag_vec = vsqrtq_f32(mag_sq);
// Reconstruct
mag_vec = vmulq_n_f32(mag_vec, scalar);
// Add 0.5 for correct rounding because vcvtq_s32_f32 truncates.
mag_vec = vaddq_f32(mag_vec, vdupq_n_f32(0.5f));
const int16x4_t mag16_vec = vmovn_s32(vcvtq_s32_f32(mag_vec));
vst1_s16(magnitudeVectorPtr, mag16_vec);
// Advance pointers
magnitudeVectorPtr += 4;
complexVectorPtr += 4;
}
// Deal with the rest
for (number = quarter_points * 4; number < num_points; number++) {
const float real = lv_creal(*complexVectorPtr) * inv_scalar;
const float imag = lv_cimag(*complexVectorPtr) * inv_scalar;
*magnitudeVectorPtr =
(int16_t)rintf(sqrtf((real * real) + (imag * imag)) * scalar);
complexVectorPtr++;
magnitudeVectorPtr++;
}
}
#endif /* LV_HAVE_NEONV8 */
#ifdef LV_HAVE_RVV
#include <riscv_vector.h>
static inline void volk_16ic_magnitude_16i_rvv(int16_t* magnitudeVector,
const lv_16sc_t* complexVector,
unsigned int num_points)
{
const float scale = SHRT_MAX, iscale = 1.0f / scale;
size_t n = num_points;
for (size_t vl; n > 0; n -= vl, complexVector += vl, magnitudeVector += vl) {
vl = __riscv_vsetvl_e16m4(n);
vint32m8_t vc = __riscv_vle32_v_i32m8((const int32_t*)complexVector, vl);
vint16m4_t vr = __riscv_vnsra(vc, 0, vl);
vint16m4_t vi = __riscv_vnsra(vc, 16, vl);
vfloat32m8_t vrf = __riscv_vfmul(__riscv_vfwcvt_f(vr, vl), iscale, vl);
vfloat32m8_t vif = __riscv_vfmul(__riscv_vfwcvt_f(vi, vl), iscale, vl);
vfloat32m8_t vf = __riscv_vfmacc(__riscv_vfmul(vif, vif, vl), vrf, vrf, vl);
vf = __riscv_vfmul(__riscv_vfsqrt(vf, vl), scale, vl);
__riscv_vse16(magnitudeVector, __riscv_vfncvt_x(vf, vl), vl);
}
}
#endif /*LV_HAVE_RVV*/
#ifdef LV_HAVE_RVVSEG
#include <riscv_vector.h>
static inline void volk_16ic_magnitude_16i_rvvseg(int16_t* magnitudeVector,
const lv_16sc_t* complexVector,
unsigned int num_points)
{
const float scale = SHRT_MAX, iscale = 1.0f / scale;
size_t n = num_points;
for (size_t vl; n > 0; n -= vl, complexVector += vl, magnitudeVector += vl) {
vl = __riscv_vsetvl_e16m4(n);
vint16m4x2_t vc = __riscv_vlseg2e16_v_i16m4x2((const int16_t*)complexVector, vl);
vint16m4_t vr = __riscv_vget_i16m4(vc, 0);
vint16m4_t vi = __riscv_vget_i16m4(vc, 1);
vfloat32m8_t vrf = __riscv_vfmul(__riscv_vfwcvt_f(vr, vl), iscale, vl);
vfloat32m8_t vif = __riscv_vfmul(__riscv_vfwcvt_f(vi, vl), iscale, vl);
vfloat32m8_t vf = __riscv_vfmacc(__riscv_vfmul(vif, vif, vl), vrf, vrf, vl);
vf = __riscv_vfmul(__riscv_vfsqrt(vf, vl), scale, vl);
__riscv_vse16(magnitudeVector, __riscv_vfncvt_x(vf, vl), vl);
}
}
#endif /*LV_HAVE_RVVSEG*/
#endif /* INCLUDED_volk_16ic_magnitude_16i_u_H */