PentHertz
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srsLTE
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minor changes

This commit is contained in:
Xavier Arteaga 2020-04-12 20:31:48 +02:00 committed by Xavier Arteaga
parent d76c77c188
commit fa776b1243
1 changed files with 40 additions and 39 deletions
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79
lib/src/phy/common/sequence.c
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@ -26,7 +26,6 @@
#ifdef LV_HAVE_SSE
#include <immintrin.h>
#include <srslte/phy/common/sequence.h>
#endif /* LV_HAVE_SSE */
/**
@ -129,8 +128,8 @@ static inline uint32_t sequence_gen_LTE_pr_memless_step_x2(uint32_t state)
}
/**
* Static precomputed array x1 and x2
* ----------------------------------
* Static precomputed x1 and x2 states after Nc shifts
* -------------------------------------------------------
*
* The pre-computation of the Pseudo-Random sequences is based in their linearity properties.
*
@ -148,7 +147,7 @@ static uint32_t sequence_x1_init = 0;
static uint32_t sequence_x2_init[SEQUENCE_SEED_LEN] = {};
/**
* C constructor, pre-computes X1 and X2 initial states and sequences
* C constructor, pre-computes X1 and X2 initial states
*/
__attribute__((constructor)) __attribute__((unused)) static void srslte_lte_pr_pregen()
{
@ -169,7 +168,7 @@ __attribute__((constructor)) __attribute__((unused)) static void srslte_lte_pr_p
}
}
static void sequence_gen_LTE_pr_memless(uint8_t* pr, uint32_t len, uint32_t seed)
static void sequence_gen_LTE_pr(uint8_t* pr, uint32_t len, uint32_t seed)
{
int n = 0;
uint32_t x1 = sequence_x1_init; // X1 initial state is fix
@ -183,7 +182,7 @@ static void sequence_gen_LTE_pr_memless(uint8_t* pr, uint32_t len, uint32_t seed
}
// Parallel stage
if (len > SEQUENCE_PAR_BITS) {
if (len >= SEQUENCE_PAR_BITS) {
for (; n < len - (SEQUENCE_PAR_BITS - 1); n += SEQUENCE_PAR_BITS) {
// XOR x1 and x2
uint32_t c = (uint32_t)(x1 ^ x2);
@ -218,7 +217,7 @@ int srslte_sequence_set_LTE_pr(srslte_sequence_t* q, uint32_t len, uint32_t seed
return SRSLTE_ERROR;
}
sequence_gen_LTE_pr_memless(q->c, len, seed);
sequence_gen_LTE_pr(q->c, len, seed);
return SRSLTE_SUCCESS;
}
@ -235,42 +234,44 @@ sequence_generate_signed(const uint8_t* c_unpacked, int8_t* c_char, int16_t* c_s
__m128i* sse_c_short = (__m128i*)c_short;
float* sse_c_float = c_float;
for (; i < ((int)len) - 15; i += 16) {
// Get bit mask
__m128i m8 = _mm_cmpgt_epi8(_mm_load_si128(sse_c), _mm_set1_epi8(0));
sse_c++;
if (len >= 16) {
for (; i < len - 15; i += 16) {
// Get bit mask
__m128i m8 = _mm_cmpgt_epi8(_mm_load_si128(sse_c), _mm_set1_epi8(0));
sse_c++;
// Generate blend masks
__m128i m16_1 = _mm_unpacklo_epi8(m8, m8);
__m128i m16_2 = _mm_unpackhi_epi8(m8, m8);
__m128 m32_1 = (__m128)_mm_unpacklo_epi8(m16_1, m16_1);
__m128 m32_2 = (__m128)_mm_unpackhi_epi8(m16_1, m16_1);
__m128 m32_3 = (__m128)_mm_unpacklo_epi8(m16_2, m16_2);
__m128 m32_4 = (__m128)_mm_unpackhi_epi8(m16_2, m16_2);
// Generate blend masks
__m128i m16_1 = _mm_unpacklo_epi8(m8, m8);
__m128i m16_2 = _mm_unpackhi_epi8(m8, m8);
__m128 m32_1 = (__m128)_mm_unpacklo_epi8(m16_1, m16_1);
__m128 m32_2 = (__m128)_mm_unpackhi_epi8(m16_1, m16_1);
__m128 m32_3 = (__m128)_mm_unpacklo_epi8(m16_2, m16_2);
__m128 m32_4 = (__m128)_mm_unpackhi_epi8(m16_2, m16_2);
// Generate int8 values
const __m128i bp = _mm_set1_epi8(+1);
const __m128i bn = _mm_set1_epi8(-1);
_mm_storeu_si128(sse_c_char, _mm_blendv_epi8(bp, bn, m8));
sse_c_char++;
// Generate int8 values
const __m128i bp = _mm_set1_epi8(+1);
const __m128i bn = _mm_set1_epi8(-1);
_mm_storeu_si128(sse_c_char, _mm_blendv_epi8(bp, bn, m8));
sse_c_char++;
// Generate int16 values
const __m128i sp = _mm_set1_epi16(+1);
const __m128i sn = _mm_set1_epi16(-1);
_mm_store_si128(sse_c_short++, _mm_blendv_epi8(sp, sn, m16_1));
_mm_store_si128(sse_c_short++, _mm_blendv_epi8(sp, sn, m16_2));
// Generate int16 values
const __m128i sp = _mm_set1_epi16(+1);
const __m128i sn = _mm_set1_epi16(-1);
_mm_store_si128(sse_c_short++, _mm_blendv_epi8(sp, sn, m16_1));
_mm_store_si128(sse_c_short++, _mm_blendv_epi8(sp, sn, m16_2));
// Generate float values
const __m128 fp = _mm_set1_ps(+1);
const __m128 fn = _mm_set1_ps(-1);
_mm_store_ps(sse_c_float, _mm_blendv_ps(fp, fn, (__m128)m32_1));
sse_c_float += 4;
_mm_store_ps(sse_c_float, _mm_blendv_ps(fp, fn, (__m128)m32_2));
sse_c_float += 4;
_mm_store_ps(sse_c_float, _mm_blendv_ps(fp, fn, (__m128)m32_3));
sse_c_float += 4;
_mm_store_ps(sse_c_float, _mm_blendv_ps(fp, fn, (__m128)m32_4));
sse_c_float += 4;
// Generate float values
const __m128 fp = _mm_set1_ps(+1);
const __m128 fn = _mm_set1_ps(-1);
_mm_store_ps(sse_c_float, _mm_blendv_ps(fp, fn, (__m128)m32_1));
sse_c_float += 4;
_mm_store_ps(sse_c_float, _mm_blendv_ps(fp, fn, (__m128)m32_2));
sse_c_float += 4;
_mm_store_ps(sse_c_float, _mm_blendv_ps(fp, fn, (__m128)m32_3));
sse_c_float += 4;
_mm_store_ps(sse_c_float, _mm_blendv_ps(fp, fn, (__m128)m32_4));
sse_c_float += 4;
}
}
#endif /* LV_HAVE_SSE */