From 70b838ff38a93b52eb51decd4e6fb39c561161d4 Mon Sep 17 00:00:00 2001 From: Elena Lukashova <elena.lukashova@eurecom.fr> Date: Fri, 20 Jul 2018 17:00:23 +0200 Subject: [PATCH] Fixing a bug in dlsch_channel_level: instead of _mm_srai_epi16 _mm_srai_epi32 should be used as _mm_madd_epi16 packs multiply-adds 16 bits and packs into 4 blocks of 32 bits. --- openair1/PHY/LTE_UE_TRANSPORT/dlsch_demodulation.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/openair1/PHY/LTE_UE_TRANSPORT/dlsch_demodulation.c b/openair1/PHY/LTE_UE_TRANSPORT/dlsch_demodulation.c index 9750656a4f..397840bfc4 100644 --- a/openair1/PHY/LTE_UE_TRANSPORT/dlsch_demodulation.c +++ b/openair1/PHY/LTE_UE_TRANSPORT/dlsch_demodulation.c @@ -3738,8 +3738,8 @@ void dlsch_channel_level(int **dl_ch_estimates_ext, for (rb=0;rb<nb_rb;rb++) { //printf("rb %d : ",rb); - avg128D = _mm_add_epi32(avg128D,_mm_srai_epi16(_mm_madd_epi16(dl_ch128[0],dl_ch128[0]),x)); - avg128D = _mm_add_epi32(avg128D,_mm_srai_epi16(_mm_madd_epi16(dl_ch128[1],dl_ch128[1]),x)); + avg128D = _mm_add_epi32(avg128D,_mm_srai_epi32(_mm_madd_epi16(dl_ch128[0],dl_ch128[0]),x)); + avg128D = _mm_add_epi32(avg128D,_mm_srai_epi32(_mm_madd_epi16(dl_ch128[1],dl_ch128[1]),x)); //avg128D = _mm_add_epi32(avg128D,_mm_madd_epi16(dl_ch128[0],_mm_srai_epi16(_mm_mulhi_epi16(dl_ch128[0], coeff128),15))); //avg128D = _mm_add_epi32(avg128D,_mm_madd_epi16(dl_ch128[1],_mm_srai_epi16(_mm_mulhi_epi16(dl_ch128[1], coeff128),15))); @@ -3748,7 +3748,7 @@ void dlsch_channel_level(int **dl_ch_estimates_ext, dl_ch128+=2; } else { - avg128D = _mm_add_epi32(avg128D,_mm_srai_epi16(_mm_madd_epi16(dl_ch128[2],dl_ch128[2]),x)); + avg128D = _mm_add_epi32(avg128D,_mm_srai_epi32(_mm_madd_epi16(dl_ch128[2],dl_ch128[2]),x)); //avg128D = _mm_add_epi32(avg128D,_mm_madd_epi16(dl_ch128[2],_mm_srai_epi16(_mm_mulhi_epi16(dl_ch128[2], coeff128),15))); dl_ch128+=3; } @@ -3863,8 +3863,8 @@ void dlsch_channel_level_core(int **dl_ch_estimates_ext, length2 = length>>3; for (ii=0;ii<length2;ii++) { - avg128D = _mm_add_epi32(avg128D,_mm_srai_epi16(_mm_madd_epi16(dl_ch128[0],dl_ch128[0]),x)); - avg128D = _mm_add_epi32(avg128D,_mm_srai_epi16(_mm_madd_epi16(dl_ch128[1],dl_ch128[1]),x)); + avg128D = _mm_add_epi32(avg128D,_mm_srai_epi32(_mm_madd_epi16(dl_ch128[0],dl_ch128[0]),x)); + avg128D = _mm_add_epi32(avg128D,_mm_srai_epi32(_mm_madd_epi16(dl_ch128[1],dl_ch128[1]),x)); dl_ch128+=2; } -- 2.26.2