maki/openairinterface5g
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Avoid multiple shifts in UL channel compensation

Browse Source
This commit is contained in:
Roberto Louro Magueta
2023-03-20 17:13:30 +00:00
parent 508d7d284b
commit 451449e148
1 changed files with 14 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files
openair1/PHY/NR_TRANSPORT/nr_ulsch_demodulation.c
+14 -10
View File
@@ -1332,13 +1332,14 @@ __m128i nr_ulsch_comp_muli_sum(__m128i input_x,
//printf("det_%d = %d log2 =%d \n",k,(((int *)&det[0])[k]),log2_approx(((int *)&det[0])[k]));
}
xy_re_128 = _mm_slli_epi32(xy_re_128,5);
xy_re_128 = _mm_srai_epi32(xy_re_128,log2_approx(sum_det));
xy_re_128 = _mm_slli_epi32(xy_re_128,5);
xy_im_128 = _mm_slli_epi32(xy_im_128,5);
xy_im_128 = _mm_srai_epi32(xy_im_128,log2_approx(sum_det));
xy_im_128 = _mm_slli_epi32(xy_im_128,5);
int b = log2_approx(sum_det) - 8;
if (b > 0) {
xy_re_128 = _mm_srai_epi32(xy_re_128, b);
xy_im_128 = _mm_srai_epi32(xy_im_128, b);
} else {
xy_re_128 = _mm_slli_epi32(xy_re_128, -b);
xy_im_128 = _mm_slli_epi32(xy_im_128, -b);
}
tmp_z0 = _mm_unpacklo_epi32(xy_re_128,xy_im_128);
//print_ints("unpack lo:",&tmp_z0[0]);
@@ -1762,9 +1763,12 @@ uint8_t nr_ulsch_zero_forcing_rx_2layers(NR_DL_FRAME_PARMS *frame_parms,
sum_det += ((((int *)&determ_fin_128[0])[k]) >> 2);
}
mmtmpD2 = _mm_slli_epi32(determ_fin_128[0], 5);
mmtmpD2 = _mm_srai_epi32(mmtmpD2, log2_approx(sum_det));
mmtmpD2 = _mm_slli_epi32(mmtmpD2, 5);
int b = log2_approx(sum_det) - 8;
if (b > 0) {
mmtmpD2 = _mm_srai_epi32(determ_fin_128[0], b);
} else {
mmtmpD2 = _mm_slli_epi32(determ_fin_128[0], -b);
}
mmtmpD3 = _mm_unpacklo_epi32(mmtmpD2, mmtmpD2);
mmtmpD2 = _mm_unpackhi_epi32(mmtmpD2, mmtmpD2);
mmtmpD2 = _mm_packs_epi32(mmtmpD3, mmtmpD2);