[hamradio-commits] [gnss-sdr] 34/303: Add NEON protokernel to volk_gnsssdr_32f_index_max_32u kernel
Carles Fernandez
carles_fernandez-guest at moszumanska.debian.org
Mon Feb 13 22:35:45 UTC 2017
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carles_fernandez-guest pushed a commit to branch master
in repository gnss-sdr.
commit 2b5ac76f8a2849929234ab8a5e100c43b3e1567a
Author: Carles Fernandez <carles.fernandez at gmail.com>
Date: Thu Sep 22 20:05:48 2016 +0200
Add NEON protokernel to volk_gnsssdr_32f_index_max_32u kernel
---
.../volk_gnsssdr/volk_gnsssdr_32f_index_max_32u.h | 83 +++++++++++++++++-----
1 file changed, 64 insertions(+), 19 deletions(-)
diff --git a/src/algorithms/libs/volk_gnsssdr_module/volk_gnsssdr/kernels/volk_gnsssdr/volk_gnsssdr_32f_index_max_32u.h b/src/algorithms/libs/volk_gnsssdr_module/volk_gnsssdr/kernels/volk_gnsssdr/volk_gnsssdr_32f_index_max_32u.h
index 56666d5..3948a96 100644
--- a/src/algorithms/libs/volk_gnsssdr_module/volk_gnsssdr/kernels/volk_gnsssdr/volk_gnsssdr_32f_index_max_32u.h
+++ b/src/algorithms/libs/volk_gnsssdr_module/volk_gnsssdr/kernels/volk_gnsssdr/volk_gnsssdr_32f_index_max_32u.h
@@ -86,13 +86,9 @@ static inline void volk_gnsssdr_32f_index_max_32u_a_avx(uint32_t* target, const
for(;number < quarterPoints; number++)
{
-
currentValues = _mm256_load_ps(inputPtr); inputPtr += 8;
currentIndexes = _mm256_add_ps(currentIndexes, indexIncrementValues);
-
- //compareResults = _mm_cmpgt_ps(maxValues, currentValues);
compareResults = _mm256_cmp_ps(maxValues, currentValues, 0x1e);
-
maxValuesIndex = _mm256_blendv_ps(currentIndexes, maxValuesIndex, compareResults);
maxValues = _mm256_blendv_ps(currentValues, maxValues, compareResults);
}
@@ -153,13 +149,9 @@ static inline void volk_gnsssdr_32f_index_max_32u_u_avx(uint32_t* target, const
for(;number < quarterPoints; number++)
{
-
currentValues = _mm256_loadu_ps(inputPtr); inputPtr += 8;
currentIndexes = _mm256_add_ps(currentIndexes, indexIncrementValues);
-
- //compareResults = _mm_cmpgt_ps(maxValues, currentValues);
compareResults = _mm256_cmp_ps(maxValues, currentValues, 0x1e);
-
maxValuesIndex = _mm256_blendv_ps(currentIndexes, maxValuesIndex, compareResults);
maxValues = _mm256_blendv_ps(currentValues, maxValues, compareResults);
}
@@ -223,9 +215,7 @@ static inline void volk_gnsssdr_32f_index_max_32u_a_sse4_1(uint32_t* target, con
currentValues = _mm_load_ps(inputPtr); inputPtr += 4;
currentIndexes = _mm_add_ps(currentIndexes, indexIncrementValues);
-
compareResults = _mm_cmpgt_ps(maxValues, currentValues);
-
maxValuesIndex = _mm_blendv_ps(currentIndexes, maxValuesIndex, compareResults);
maxValues = _mm_blendv_ps(currentValues, maxValues, compareResults);
}
@@ -286,12 +276,9 @@ static inline void volk_gnsssdr_32f_index_max_32u_u_sse4_1(uint32_t* target, con
for(;number < quarterPoints; number++)
{
-
currentValues = _mm_loadu_ps(inputPtr); inputPtr += 4;
currentIndexes = _mm_add_ps(currentIndexes, indexIncrementValues);
-
compareResults = _mm_cmpgt_ps(maxValues, currentValues);
-
maxValuesIndex = _mm_blendv_ps(currentIndexes, maxValuesIndex, compareResults);
maxValues = _mm_blendv_ps(currentValues, maxValues, compareResults);
}
@@ -355,11 +342,8 @@ static inline void volk_gnsssdr_32f_index_max_32u_a_sse(uint32_t* target, const
{
currentValues = _mm_load_ps(inputPtr); inputPtr += 4;
currentIndexes = _mm_add_ps(currentIndexes, indexIncrementValues);
-
compareResults = _mm_cmpgt_ps(maxValues, currentValues);
-
maxValuesIndex = _mm_or_ps(_mm_and_ps(compareResults, maxValuesIndex) , _mm_andnot_ps(compareResults, currentIndexes));
-
maxValues = _mm_or_ps(_mm_and_ps(compareResults, maxValues) , _mm_andnot_ps(compareResults, currentValues));
}
@@ -422,11 +406,8 @@ static inline void volk_gnsssdr_32f_index_max_32u_u_sse(uint32_t* target, const
{
currentValues = _mm_loadu_ps(inputPtr); inputPtr += 4;
currentIndexes = _mm_add_ps(currentIndexes, indexIncrementValues);
-
compareResults = _mm_cmpgt_ps(maxValues, currentValues);
-
maxValuesIndex = _mm_or_ps(_mm_and_ps(compareResults, maxValuesIndex) , _mm_andnot_ps(compareResults, currentIndexes));
-
maxValues = _mm_or_ps(_mm_and_ps(compareResults, maxValues) , _mm_andnot_ps(compareResults, currentValues));
}
@@ -485,4 +466,68 @@ static inline void volk_gnsssdr_32f_index_max_32u_generic(uint32_t* target, cons
#endif /*LV_HAVE_GENERIC*/
+#ifdef LV_HAVE_NEON
+#include <arm_neon.h>
+
+static inline void volk_gnsssdr_32f_index_max_32u_neon(uint32_t* target, const float* src0, uint32_t num_points)
+{
+ if(num_points > 0)
+ {
+ uint32_t number = 0;
+ const uint32_t quarterPoints = num_points / 4;
+
+ float* inputPtr = (float*)src0;
+ float32x4_t indexIncrementValues = vdupq_n_f32(4);
+ __VOLK_ATTR_ALIGNED(16) float currentIndexes_float[4] = { -4.0f, -3.0f, -2.0f, -1.0f };
+ float32x4_t currentIndexes = vld1q_f32(currentIndexes_float);
+
+ float max = src0[0];
+ float index = 0;
+ float32x4_t maxValues = vdupq_n_f32(max);
+ uint32x4_t maxValuesIndex = vmovq_n_u32(0);
+ uint32x4_t compareResults;
+ uint32x4_t currentIndexes_u;
+ float32x4_t currentValues;
+
+ __VOLK_ATTR_ALIGNED(16) float maxValuesBuffer[4];
+ __VOLK_ATTR_ALIGNED(16) float maxIndexesBuffer[4];
+
+ for(;number < quarterPoints; number++)
+ {
+ currentValues = vld1q_f32(inputPtr); inputPtr += 4;
+ currentIndexes = vaddq_f32(currentIndexes, indexIncrementValues);
+ currentIndexes_u = vcvtq_u32_f32(currentIndexes);
+ compareResults = vcgtq_f32( maxValues, currentValues);
+ maxValuesIndex = vorrq_u32( vandq_u32( compareResults, maxValuesIndex ), vbicq_u32(currentIndexes_u, compareResults) );
+ maxValues = vmaxq_f32(currentValues, maxValues);
+ }
+
+ // Calculate the largest value from the remaining 4 points
+ vst1q_f32(maxValuesBuffer, maxValues);
+ vst1q_f32(maxIndexesBuffer, vcvtq_f32_u32(maxValuesIndex));
+ for(number = 0; number < 4; number++)
+ {
+ if(maxValuesBuffer[number] > max)
+ {
+ index = maxIndexesBuffer[number];
+ max = maxValuesBuffer[number];
+ }
+ }
+
+ number = quarterPoints * 4;
+ for(;number < num_points; number++)
+ {
+ if(src0[number] > max)
+ {
+ index = number;
+ max = src0[number];
+ }
+ }
+ target[0] = (uint32_t)index;
+ }
+}
+
+#endif /*LV_HAVE_NEON*/
+
#endif /*INCLUDED_volk_gnsssdr_32f_index_max_32u_H*/
+
--
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