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| author | Matt Ettus <matt@ettus.com> | 2011-10-13 17:20:17 -0700 |
|---|---|---|
| committer | Matt Ettus <matt@ettus.com> | 2011-10-26 15:57:22 -0700 |
| commit | 59c4a2bfc2fc4d9f6f98628b28f4eff6151d6844 (patch) | |
| tree | 735c588ab2d2d980fc86a43fed9fba115f40d1fd /usrp2 | |
| parent | 6e2c70c914ad8d454ad575257ed16cbd8f59c052 (diff) | |
| download | uhd-59c4a2bfc2fc4d9f6f98628b28f4eff6151d6844.tar.gz uhd-59c4a2bfc2fc4d9f6f98628b28f4eff6151d6844.tar.bz2 uhd-59c4a2bfc2fc4d9f6f98628b28f4eff6151d6844.zip | |
dsp: make rounding a single bit work again
Diffstat (limited to 'usrp2')
| -rw-r--r-- | usrp2/sdr_lib/round.v | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/usrp2/sdr_lib/round.v b/usrp2/sdr_lib/round.v index 5b83981c6..26d5a4cf4 100644 --- a/usrp2/sdr_lib/round.v +++ b/usrp2/sdr_lib/round.v @@ -32,12 +32,20 @@ module round output [bits_out-1:0] out, output [bits_in-bits_out:0] err); - wire round_corr; - wire round_corr_trunc = 0; - wire round_corr_rtz = (in[bits_in-1] & |in[bits_in-bits_out-1:0]); - wire round_corr_nearest = in[bits_in-bits_out-1]; - wire round_corr_nearest_safe = (~in[bits_in-1] & (&in[bits_in-2:bits_out])) ? 0 : + wire round_corr,round_corr_trunc,round_corr_rtz,round_corr_nearest,round_corr_nearest_safe; + + assign round_corr_trunc = 0; + assign round_corr_rtz = (in[bits_in-1] & |in[bits_in-bits_out-1:0]); + assign round_corr_nearest = in[bits_in-bits_out-1]; + + generate + if(bits_in-bits_out > 1) + assign round_corr_nearest_safe = (~in[bits_in-1] & (&in[bits_in-2:bits_out])) ? 0 : round_corr_nearest; + else + assign round_corr_nearest_safe = round_corr_nearest; + endgenerate + assign round_corr = round_to_nearest ? round_corr_nearest_safe : trunc ? round_corr_trunc : |