Not enough sites to place MULT18X18?

K

Kelvin @ SG

Guest
Hi, there:

I am implementing a partial chip for virtex-2-6000. My module has 116
multipliers, the module is allocated an area group with 120 multipliers.
Later I got 9 multipliers not placed, while the PAR
informs there are 13 available sites for placing them...However, the
placement failed...

How may I handle such a situation?
Replace some smaller * with rtl implementation? How many slices can I
implement an 8X8 muldipler?
Repartitioning to put some * signs in somebody else's modules? Possible
but troublesome...

Best Regards,
Kelvin






Phase 6.9
WARNING:place:119 - Unable to find location. MULT component

i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_wkq_calc_mul_inst_
m
ult_11 not placed.
MULT18X18
"i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_wkq_calc_mul_inst
_mul
t_11".
COMPGRP "RX.MULT18X18" LOCATE = SITE "MULT18X18_X1Y23:MULT18X18_X5Y0"
LEVEL 4 ;
Only the one associated with MULT18X18
i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_wkq_calc_mul_inst_
mult
_11 will be looked at.
The AREA group contains 120 possible sites for this component. 13 of these
sites were available to place this component into.
===============================================================
List of 13 available sites in area are:
Site MULT18X18_X1Y3
Site MULT18X18_X1Y5
Site MULT18X18_X1Y12
Site MULT18X18_X1Y15
Site MULT18X18_X1Y19
Site MULT18X18_X2Y4
Site MULT18X18_X2Y6
Site MULT18X18_X2Y8
Site MULT18X18_X2Y12
Site MULT18X18_X2Y16
Site MULT18X18_X2Y19
Site MULT18X18_X2Y20
Site MULT18X18_X2Y22
===============================================================
List of comps in area without same LOC are:
===============================================================
WARNING:place:119 - Unable to find location. MULT component

i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_calc/Mmult_data_q0_b_mul_inst_mu
l
t_2 not placed.
MULT18X18
"i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_calc/Mmult_data_q0_b_mul_inst_m
ult_
2".
COMPGRP "RX.MULT18X18" LOCATE = SITE "MULT18X18_X1Y23:MULT18X18_X5Y0"
LEVEL 4 ;
Only the one associated with MULT18X18
i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_calc/Mmult_data_q0_b_mul_inst_mu
lt_2
will be looked at.
The AREA group contains 120 possible sites for this component. 13 of these
sites were available to place this component into.
===============================================================
List of 13 available sites in area are:
Site MULT18X18_X1Y3
Site MULT18X18_X1Y5
Site MULT18X18_X1Y12
Site MULT18X18_X1Y15
Site MULT18X18_X1Y19
Site MULT18X18_X2Y4
Site MULT18X18_X2Y6
Site MULT18X18_X2Y8
Site MULT18X18_X2Y12
Site MULT18X18_X2Y16
Site MULT18X18_X2Y19
Site MULT18X18_X2Y20
Site MULT18X18_X2Y22
===============================================================
List of comps in area without same LOC are:
===============================================================
WARNING:place:119 - Unable to find location. MULT component

i_ofdm_rx/i_wrx_top/i_multipath_top/i_multipath_wk_calc/Mmult__n0009_inst_mu
l
t_3 not placed.
MULT18X18
"i_ofdm_rx/i_wrx_top/i_multipath_top/i_multipath_wk_calc/Mmult__n0009_inst_m
ult_
3".
COMPGRP "RX.MULT18X18" LOCATE = SITE "MULT18X18_X1Y23:MULT18X18_X5Y0"
LEVEL 4 ;
Only the one associated with MULT18X18
i_ofdm_rx/i_wrx_top/i_multipath_top/i_multipath_wk_calc/Mmult__n0009_inst_mu
lt_3
will be looked at.
The AREA group contains 120 possible sites for this component. 13 of these
sites were available to place this component into.
===============================================================
List of 13 available sites in area are:
Site MULT18X18_X1Y3
Site MULT18X18_X1Y5
Site MULT18X18_X1Y12
Site MULT18X18_X1Y15
Site MULT18X18_X1Y19
Site MULT18X18_X2Y4
Site MULT18X18_X2Y6
Site MULT18X18_X2Y8
Site MULT18X18_X2Y12
Site MULT18X18_X2Y16
Site MULT18X18_X2Y19
Site MULT18X18_X2Y20
Site MULT18X18_X2Y22
===============================================================
List of comps in area without same LOC are:
===============================================================
WARNING:place:119 - Unable to find location. MULT component

i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_dataii_mul_inst_mu
l
t_1 not placed.
MULT18X18
"i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_dataii_mul_inst_m
ult_
1".
COMPGRP "RX.MULT18X18" LOCATE = SITE "MULT18X18_X1Y23:MULT18X18_X5Y0"
LEVEL 4 ;
Only the one associated with MULT18X18
i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_dataii_mul_inst_mu
lt_1
will be looked at.
The AREA group contains 120 possible sites for this component. 13 of these
sites were available to place this component into.
===============================================================
List of 13 available sites in area are:
Site MULT18X18_X1Y3
Site MULT18X18_X1Y5
Site MULT18X18_X1Y12
Site MULT18X18_X1Y15
Site MULT18X18_X1Y19
Site MULT18X18_X2Y4
Site MULT18X18_X2Y6
Site MULT18X18_X2Y8
Site MULT18X18_X2Y12
Site MULT18X18_X2Y16
Site MULT18X18_X2Y19
Site MULT18X18_X2Y20
Site MULT18X18_X2Y22
===============================================================
List of comps in area without same LOC are:
===============================================================
WARNING:place:119 - Unable to find location. MULT component

i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_calc/Mmult_data_i0_a_mul_inst_mu
l
t_2 not placed.
MULT18X18
"i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_calc/Mmult_data_i0_a_mul_inst_m
ult_
2".
COMPGRP "RX.MULT18X18" LOCATE = SITE "MULT18X18_X1Y23:MULT18X18_X5Y0"
LEVEL 4 ;
Only the one associated with MULT18X18
i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_calc/Mmult_data_i0_a_mul_inst_mu
lt_2
will be looked at.
The AREA group contains 120 possible sites for this component. 13 of these
sites were available to place this component into.
===============================================================
List of 13 available sites in area are:
Site MULT18X18_X1Y3
Site MULT18X18_X1Y5
Site MULT18X18_X1Y12
Site MULT18X18_X1Y15
Site MULT18X18_X1Y19
Site MULT18X18_X2Y4
Site MULT18X18_X2Y6
Site MULT18X18_X2Y8
Site MULT18X18_X2Y12
Site MULT18X18_X2Y16
Site MULT18X18_X2Y19
Site MULT18X18_X2Y20
Site MULT18X18_X2Y22
===============================================================
List of comps in area without same LOC are:
===============================================================
WARNING:place:119 - Unable to find location. MULT component

i_ofdm_rx/i_wrx_top/i_multipath_top/i_multipath_wk_calc/Mmult__n0010_inst_mu
l
t_3 not placed.
MULT18X18
"i_ofdm_rx/i_wrx_top/i_multipath_top/i_multipath_wk_calc/Mmult__n0010_inst_m
ult_
3".
COMPGRP "RX.MULT18X18" LOCATE = SITE "MULT18X18_X1Y23:MULT18X18_X5Y0"
LEVEL 4 ;
Only the one associated with MULT18X18
i_ofdm_rx/i_wrx_top/i_multipath_top/i_multipath_wk_calc/Mmult__n0010_inst_mu
lt_3
will be looked at.
The AREA group contains 120 possible sites for this component. 13 of these
sites were available to place this component into.
===============================================================
List of 13 available sites in area are:
Site MULT18X18_X1Y3
Site MULT18X18_X1Y5
Site MULT18X18_X1Y12
Site MULT18X18_X1Y15
Site MULT18X18_X1Y19
Site MULT18X18_X2Y4
Site MULT18X18_X2Y6
Site MULT18X18_X2Y8
Site MULT18X18_X2Y12
Site MULT18X18_X2Y16
Site MULT18X18_X2Y19
Site MULT18X18_X2Y20
Site MULT18X18_X2Y22
===============================================================
List of comps in area without same LOC are:
===============================================================
WARNING:place:119 - Unable to find location. MULT component

i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_dataqq_mul_inst_mu
l
t_1 not placed.
MULT18X18
"i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_dataqq_mul_inst_m
ult_
1".
COMPGRP "RX.MULT18X18" LOCATE = SITE "MULT18X18_X1Y23:MULT18X18_X5Y0"
LEVEL 4 ;
Only the one associated with MULT18X18
i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_dataqq_mul_inst_mu
lt_1
will be looked at.
The AREA group contains 120 possible sites for this component. 13 of these
sites were available to place this component into.
===============================================================
List of 13 available sites in area are:
Site MULT18X18_X1Y3
Site MULT18X18_X1Y5
Site MULT18X18_X1Y12
Site MULT18X18_X1Y15
Site MULT18X18_X1Y19
Site MULT18X18_X2Y4
Site MULT18X18_X2Y6
Site MULT18X18_X2Y8
Site MULT18X18_X2Y12
Site MULT18X18_X2Y16
Site MULT18X18_X2Y19
Site MULT18X18_X2Y20
Site MULT18X18_X2Y22
===============================================================
List of comps in area without same LOC are:
===============================================================
WARNING:place:119 - Unable to find location. MULT component

i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_wki_calc_mul_inst_
m
ult_11 not placed.
MULT18X18
"i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_wki_calc_mul_inst
_mul
t_11".
COMPGRP "RX.MULT18X18" LOCATE = SITE "MULT18X18_X1Y23:MULT18X18_X5Y0"
LEVEL 4 ;
Only the one associated with MULT18X18
i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_wki_calc_mul_inst_
mult
_11 will be looked at.
The AREA group contains 120 possible sites for this component. 13 of these
sites were available to place this component into.
===============================================================
List of 13 available sites in area are:
Site MULT18X18_X1Y3
Site MULT18X18_X1Y5
Site MULT18X18_X1Y12
Site MULT18X18_X1Y15
Site MULT18X18_X1Y19
Site MULT18X18_X2Y4
Site MULT18X18_X2Y6
Site MULT18X18_X2Y8
Site MULT18X18_X2Y12
Site MULT18X18_X2Y16
Site MULT18X18_X2Y19
Site MULT18X18_X2Y20
Site MULT18X18_X2Y22
===============================================================
List of comps in area without same LOC are:
===============================================================
WARNING:place:119 - Unable to find location. MULT component

i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_calc/Mmult_data_i0_b_mul_inst_mu
l
t_2 not placed.
MULT18X18
"i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_calc/Mmult_data_i0_b_mul_inst_m
ult_
2".
COMPGRP "RX.MULT18X18" LOCATE = SITE "MULT18X18_X1Y23:MULT18X18_X5Y0"
LEVEL 4 ;
Only the one associated with MULT18X18
i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_calc/Mmult_data_i0_b_mul_inst_mu
lt_2
will be looked at.
The AREA group contains 120 possible sites for this component. 13 of these
sites were available to place this component into.
===============================================================
List of 13 available sites in area are:
Site MULT18X18_X1Y3
Site MULT18X18_X1Y5
Site MULT18X18_X1Y12
Site MULT18X18_X1Y15
Site MULT18X18_X1Y19
Site MULT18X18_X2Y4
Site MULT18X18_X2Y6
Site MULT18X18_X2Y8
Site MULT18X18_X2Y12
Site MULT18X18_X2Y16
Site MULT18X18_X2Y19
Site MULT18X18_X2Y20
Site MULT18X18_X2Y22
===============================================================
List of comps in area without same LOC are:
===============================================================
ERROR:place:120 - There were not enough sites to place all selected
components
Phase 6.9 (Checksum:39386fa) REAL time: 27 mins 46 secs

Total REAL time to Placer completion: 27 mins 47 secs
 
Kelvin,

You will probably find that some of the multiplier sites are blocked from
being used due to
some block RAMs having widths of > 18 bits. If so, try to change some of the
RAMs to
have smaller widths.

I have a design which now uses all 144 of the V2-6000 multipliers, and most
of the RAMs
without prob. I had to reduce the width of all of the RAMs to 18 bits or
less for the multipliers
to be available for use.

(I was impressed that Mentor Precision automatically used multipliers built
with LUTs, once it had
used up all the available multipiers).

Good Luck,

Ken,
Morrow Electronics Limited, UK
Currently specialising in FPGA design for 3G.
www.morro.co.uk


"Kelvin @ SG" <kelvin8157@hotmail.com> wrote in message
news:4091f4e6@news.starhub.net.sg...
Hi, there:

I am implementing a partial chip for virtex-2-6000. My module has 116
multipliers, the module is allocated an area group with 120 multipliers.
Later I got 9 multipliers not placed, while the PAR
informs there are 13 available sites for placing them...However, the
placement failed...

How may I handle such a situation?
Replace some smaller * with rtl implementation? How many slices can I
implement an 8X8 muldipler?
Repartitioning to put some * signs in somebody else's modules?
Possible
but troublesome...

Best Regards,
Kelvin






Phase 6.9
WARNING:place:119 - Unable to find location. MULT component


i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_wkq_calc_mul_inst_
m
ult_11 not placed.
MULT18X18

"i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_wkq_calc_mul_inst
_mul
t_11".
COMPGRP "RX.MULT18X18" LOCATE = SITE
"MULT18X18_X1Y23:MULT18X18_X5Y0"
LEVEL 4 ;
Only the one associated with MULT18X18

i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_wkq_calc_mul_inst_
mult
_11 will be looked at.
The AREA group contains 120 possible sites for this component. 13 of
these
sites were available to place this component into.
===============================================================
List of 13 available sites in area are:
Site MULT18X18_X1Y3
Site MULT18X18_X1Y5
Site MULT18X18_X1Y12
Site MULT18X18_X1Y15
Site MULT18X18_X1Y19
Site MULT18X18_X2Y4
Site MULT18X18_X2Y6
Site MULT18X18_X2Y8
Site MULT18X18_X2Y12
Site MULT18X18_X2Y16
Site MULT18X18_X2Y19
Site MULT18X18_X2Y20
Site MULT18X18_X2Y22
===============================================================
List of comps in area without same LOC are:
===============================================================
WARNING:place:119 - Unable to find location. MULT component


i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_calc/Mmult_data_q0_b_mul_inst_mu
l
t_2 not placed.
MULT18X18

"i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_calc/Mmult_data_q0_b_mul_inst_m
ult_
2".
COMPGRP "RX.MULT18X18" LOCATE = SITE
"MULT18X18_X1Y23:MULT18X18_X5Y0"
LEVEL 4 ;
Only the one associated with MULT18X18

i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_calc/Mmult_data_q0_b_mul_inst_mu
lt_2
will be looked at.
The AREA group contains 120 possible sites for this component. 13 of
these
sites were available to place this component into.
===============================================================
List of 13 available sites in area are:
Site MULT18X18_X1Y3
Site MULT18X18_X1Y5
Site MULT18X18_X1Y12
Site MULT18X18_X1Y15
Site MULT18X18_X1Y19
Site MULT18X18_X2Y4
Site MULT18X18_X2Y6
Site MULT18X18_X2Y8
Site MULT18X18_X2Y12
Site MULT18X18_X2Y16
Site MULT18X18_X2Y19
Site MULT18X18_X2Y20
Site MULT18X18_X2Y22
===============================================================
List of comps in area without same LOC are:
===============================================================
WARNING:place:119 - Unable to find location. MULT component


i_ofdm_rx/i_wrx_top/i_multipath_top/i_multipath_wk_calc/Mmult__n0009_inst_mu
l
t_3 not placed.
MULT18X18

"i_ofdm_rx/i_wrx_top/i_multipath_top/i_multipath_wk_calc/Mmult__n0009_inst_m
ult_
3".
COMPGRP "RX.MULT18X18" LOCATE = SITE
"MULT18X18_X1Y23:MULT18X18_X5Y0"
LEVEL 4 ;
Only the one associated with MULT18X18

i_ofdm_rx/i_wrx_top/i_multipath_top/i_multipath_wk_calc/Mmult__n0009_inst_mu
lt_3
will be looked at.
The AREA group contains 120 possible sites for this component. 13 of
these
sites were available to place this component into.
===============================================================
List of 13 available sites in area are:
Site MULT18X18_X1Y3
Site MULT18X18_X1Y5
Site MULT18X18_X1Y12
Site MULT18X18_X1Y15
Site MULT18X18_X1Y19
Site MULT18X18_X2Y4
Site MULT18X18_X2Y6
Site MULT18X18_X2Y8
Site MULT18X18_X2Y12
Site MULT18X18_X2Y16
Site MULT18X18_X2Y19
Site MULT18X18_X2Y20
Site MULT18X18_X2Y22
===============================================================
List of comps in area without same LOC are:
===============================================================
WARNING:place:119 - Unable to find location. MULT component


i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_dataii_mul_inst_mu
l
t_1 not placed.
MULT18X18

"i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_dataii_mul_inst_m
ult_
1".
COMPGRP "RX.MULT18X18" LOCATE = SITE
"MULT18X18_X1Y23:MULT18X18_X5Y0"
LEVEL 4 ;
Only the one associated with MULT18X18

i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_dataii_mul_inst_mu
lt_1
will be looked at.
The AREA group contains 120 possible sites for this component. 13 of
these
sites were available to place this component into.
===============================================================
List of 13 available sites in area are:
Site MULT18X18_X1Y3
Site MULT18X18_X1Y5
Site MULT18X18_X1Y12
Site MULT18X18_X1Y15
Site MULT18X18_X1Y19
Site MULT18X18_X2Y4
Site MULT18X18_X2Y6
Site MULT18X18_X2Y8
Site MULT18X18_X2Y12
Site MULT18X18_X2Y16
Site MULT18X18_X2Y19
Site MULT18X18_X2Y20
Site MULT18X18_X2Y22
===============================================================
List of comps in area without same LOC are:
===============================================================
WARNING:place:119 - Unable to find location. MULT component


i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_calc/Mmult_data_i0_a_mul_inst_mu
l
t_2 not placed.
MULT18X18

"i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_calc/Mmult_data_i0_a_mul_inst_m
ult_
2".
COMPGRP "RX.MULT18X18" LOCATE = SITE
"MULT18X18_X1Y23:MULT18X18_X5Y0"
LEVEL 4 ;
Only the one associated with MULT18X18

i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_calc/Mmult_data_i0_a_mul_inst_mu
lt_2
will be looked at.
The AREA group contains 120 possible sites for this component. 13 of
these
sites were available to place this component into.
===============================================================
List of 13 available sites in area are:
Site MULT18X18_X1Y3
Site MULT18X18_X1Y5
Site MULT18X18_X1Y12
Site MULT18X18_X1Y15
Site MULT18X18_X1Y19
Site MULT18X18_X2Y4
Site MULT18X18_X2Y6
Site MULT18X18_X2Y8
Site MULT18X18_X2Y12
Site MULT18X18_X2Y16
Site MULT18X18_X2Y19
Site MULT18X18_X2Y20
Site MULT18X18_X2Y22
===============================================================
List of comps in area without same LOC are:
===============================================================
WARNING:place:119 - Unable to find location. MULT component


i_ofdm_rx/i_wrx_top/i_multipath_top/i_multipath_wk_calc/Mmult__n0010_inst_mu
l
t_3 not placed.
MULT18X18

"i_ofdm_rx/i_wrx_top/i_multipath_top/i_multipath_wk_calc/Mmult__n0010_inst_m
ult_
3".
COMPGRP "RX.MULT18X18" LOCATE = SITE
"MULT18X18_X1Y23:MULT18X18_X5Y0"
LEVEL 4 ;
Only the one associated with MULT18X18

i_ofdm_rx/i_wrx_top/i_multipath_top/i_multipath_wk_calc/Mmult__n0010_inst_mu
lt_3
will be looked at.
The AREA group contains 120 possible sites for this component. 13 of
these
sites were available to place this component into.
===============================================================
List of 13 available sites in area are:
Site MULT18X18_X1Y3
Site MULT18X18_X1Y5
Site MULT18X18_X1Y12
Site MULT18X18_X1Y15
Site MULT18X18_X1Y19
Site MULT18X18_X2Y4
Site MULT18X18_X2Y6
Site MULT18X18_X2Y8
Site MULT18X18_X2Y12
Site MULT18X18_X2Y16
Site MULT18X18_X2Y19
Site MULT18X18_X2Y20
Site MULT18X18_X2Y22
===============================================================
List of comps in area without same LOC are:
===============================================================
WARNING:place:119 - Unable to find location. MULT component


i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_dataqq_mul_inst_mu
l
t_1 not placed.
MULT18X18

"i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_dataqq_mul_inst_m
ult_
1".
COMPGRP "RX.MULT18X18" LOCATE = SITE
"MULT18X18_X1Y23:MULT18X18_X5Y0"
LEVEL 4 ;
Only the one associated with MULT18X18

i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_dataqq_mul_inst_mu
lt_1
will be looked at.
The AREA group contains 120 possible sites for this component. 13 of
these
sites were available to place this component into.
===============================================================
List of 13 available sites in area are:
Site MULT18X18_X1Y3
Site MULT18X18_X1Y5
Site MULT18X18_X1Y12
Site MULT18X18_X1Y15
Site MULT18X18_X1Y19
Site MULT18X18_X2Y4
Site MULT18X18_X2Y6
Site MULT18X18_X2Y8
Site MULT18X18_X2Y12
Site MULT18X18_X2Y16
Site MULT18X18_X2Y19
Site MULT18X18_X2Y20
Site MULT18X18_X2Y22
===============================================================
List of comps in area without same LOC are:
===============================================================
WARNING:place:119 - Unable to find location. MULT component


i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_wki_calc_mul_inst_
m
ult_11 not placed.
MULT18X18

"i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_wki_calc_mul_inst
_mul
t_11".
COMPGRP "RX.MULT18X18" LOCATE = SITE
"MULT18X18_X1Y23:MULT18X18_X5Y0"
LEVEL 4 ;
Only the one associated with MULT18X18

i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_wki_calc_mul_inst_
mult
_11 will be looked at.
The AREA group contains 120 possible sites for this component. 13 of
these
sites were available to place this component into.
===============================================================
List of 13 available sites in area are:
Site MULT18X18_X1Y3
Site MULT18X18_X1Y5
Site MULT18X18_X1Y12
Site MULT18X18_X1Y15
Site MULT18X18_X1Y19
Site MULT18X18_X2Y4
Site MULT18X18_X2Y6
Site MULT18X18_X2Y8
Site MULT18X18_X2Y12
Site MULT18X18_X2Y16
Site MULT18X18_X2Y19
Site MULT18X18_X2Y20
Site MULT18X18_X2Y22
===============================================================
List of comps in area without same LOC are:
===============================================================
WARNING:place:119 - Unable to find location. MULT component


i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_calc/Mmult_data_i0_b_mul_inst_mu
l
t_2 not placed.
MULT18X18

"i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_calc/Mmult_data_i0_b_mul_inst_m
ult_
2".
COMPGRP "RX.MULT18X18" LOCATE = SITE
"MULT18X18_X1Y23:MULT18X18_X5Y0"
LEVEL 4 ;
Only the one associated with MULT18X18

i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_calc/Mmult_data_i0_b_mul_inst_mu
lt_2
will be looked at.
The AREA group contains 120 possible sites for this component. 13 of
these
sites were available to place this component into.
===============================================================
List of 13 available sites in area are:
Site MULT18X18_X1Y3
Site MULT18X18_X1Y5
Site MULT18X18_X1Y12
Site MULT18X18_X1Y15
Site MULT18X18_X1Y19
Site MULT18X18_X2Y4
Site MULT18X18_X2Y6
Site MULT18X18_X2Y8
Site MULT18X18_X2Y12
Site MULT18X18_X2Y16
Site MULT18X18_X2Y19
Site MULT18X18_X2Y20
Site MULT18X18_X2Y22
===============================================================
List of comps in area without same LOC are:
===============================================================
ERROR:place:120 - There were not enough sites to place all selected
components
Phase 6.9 (Checksum:39386fa) REAL time: 27 mins 46 secs

Total REAL time to Placer completion: 27 mins 47 secs
Click to expand...
 
i used core generator to generate the RAMs, and they have 64-depth 64-bit
RAMs,
so I have no much control over how XST implements it in the synthesis.
Actually in
Floor Planner I can see some BRAM and MULT18X18 side by side...

I have replaced 16 multipliers with LUTs implementions from Core
generator...
And it is working now but I am concerned with the slice usage...

Kelvin





"Ken Morrow" <junk@not_morro.co.uk> wrote in message
news:vzrkc.36293$h44.5385972@stones.force9.net...
Kelvin,

You will probably find that some of the multiplier sites are blocked from
being used due to
some block RAMs having widths of > 18 bits. If so, try to change some of
the
RAMs to
have smaller widths.

I have a design which now uses all 144 of the V2-6000 multipliers, and
most
of the RAMs
without prob. I had to reduce the width of all of the RAMs to 18 bits or
less for the multipliers
to be available for use.

(I was impressed that Mentor Precision automatically used multipliers
built
with LUTs, once it had
used up all the available multipiers).

Good Luck,

Ken,
Morrow Electronics Limited, UK
Currently specialising in FPGA design for 3G.
www.morro.co.uk


"Kelvin @ SG" <kelvin8157@hotmail.com> wrote in message
news:4091f4e6@news.starhub.net.sg...
Hi, there:

I am implementing a partial chip for virtex-2-6000. My module has 116
multipliers, the module is allocated an area group with 120 multipliers.
Later I got 9 multipliers not placed, while the PAR
informs there are 13 available sites for placing them...However, the
placement failed...

How may I handle such a situation?
Replace some smaller * with rtl implementation? How many slices can
I
implement an 8X8 muldipler?
Repartitioning to put some * signs in somebody else's modules?
Possible
but troublesome...

Best Regards,
Kelvin






Phase 6.9
WARNING:place:119 - Unable to find location. MULT component



i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_wkq_calc_mul_inst_
m
ult_11 not placed.
MULT18X18


"i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_wkq_calc_mul_inst
_mul
t_11".
COMPGRP "RX.MULT18X18" LOCATE = SITE
"MULT18X18_X1Y23:MULT18X18_X5Y0"
LEVEL 4 ;
Only the one associated with MULT18X18


i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_wkq_calc_mul_inst_
mult
_11 will be looked at.
The AREA group contains 120 possible sites for this component. 13 of
these
sites were available to place this component into.
===============================================================
List of 13 available sites in area are:
Site MULT18X18_X1Y3
Site MULT18X18_X1Y5
Site MULT18X18_X1Y12
Site MULT18X18_X1Y15
Site MULT18X18_X1Y19
Site MULT18X18_X2Y4
Site MULT18X18_X2Y6
Site MULT18X18_X2Y8
Site MULT18X18_X2Y12
Site MULT18X18_X2Y16
Site MULT18X18_X2Y19
Site MULT18X18_X2Y20
Site MULT18X18_X2Y22
===============================================================
List of comps in area without same LOC are:
===============================================================
WARNING:place:119 - Unable to find location. MULT component



i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_calc/Mmult_data_q0_b_mul_inst_mu
l
t_2 not placed.
MULT18X18


"i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_calc/Mmult_data_q0_b_mul_inst_m
ult_
2".
COMPGRP "RX.MULT18X18" LOCATE = SITE
"MULT18X18_X1Y23:MULT18X18_X5Y0"
LEVEL 4 ;
Only the one associated with MULT18X18


i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_calc/Mmult_data_q0_b_mul_inst_mu
lt_2
will be looked at.
The AREA group contains 120 possible sites for this component. 13 of
these
sites were available to place this component into.
===============================================================
List of 13 available sites in area are:
Site MULT18X18_X1Y3
Site MULT18X18_X1Y5
Site MULT18X18_X1Y12
Site MULT18X18_X1Y15
Site MULT18X18_X1Y19
Site MULT18X18_X2Y4
Site MULT18X18_X2Y6
Site MULT18X18_X2Y8
Site MULT18X18_X2Y12
Site MULT18X18_X2Y16
Site MULT18X18_X2Y19
Site MULT18X18_X2Y20
Site MULT18X18_X2Y22
===============================================================
List of comps in area without same LOC are:
===============================================================
WARNING:place:119 - Unable to find location. MULT component



i_ofdm_rx/i_wrx_top/i_multipath_top/i_multipath_wk_calc/Mmult__n0009_inst_mu
l
t_3 not placed.
MULT18X18


"i_ofdm_rx/i_wrx_top/i_multipath_top/i_multipath_wk_calc/Mmult__n0009_inst_m
ult_
3".
COMPGRP "RX.MULT18X18" LOCATE = SITE
"MULT18X18_X1Y23:MULT18X18_X5Y0"
LEVEL 4 ;
Only the one associated with MULT18X18


i_ofdm_rx/i_wrx_top/i_multipath_top/i_multipath_wk_calc/Mmult__n0009_inst_mu
lt_3
will be looked at.
The AREA group contains 120 possible sites for this component. 13 of
these
sites were available to place this component into.
===============================================================
List of 13 available sites in area are:
Site MULT18X18_X1Y3
Site MULT18X18_X1Y5
Site MULT18X18_X1Y12
Site MULT18X18_X1Y15
Site MULT18X18_X1Y19
Site MULT18X18_X2Y4
Site MULT18X18_X2Y6
Site MULT18X18_X2Y8
Site MULT18X18_X2Y12
Site MULT18X18_X2Y16
Site MULT18X18_X2Y19
Site MULT18X18_X2Y20
Site MULT18X18_X2Y22
===============================================================
List of comps in area without same LOC are:
===============================================================
WARNING:place:119 - Unable to find location. MULT component



i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_dataii_mul_inst_mu
l
t_1 not placed.
MULT18X18


"i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_dataii_mul_inst_m
ult_
1".
COMPGRP "RX.MULT18X18" LOCATE = SITE
"MULT18X18_X1Y23:MULT18X18_X5Y0"
LEVEL 4 ;
Only the one associated with MULT18X18


i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_dataii_mul_inst_mu
lt_1
will be looked at.
The AREA group contains 120 possible sites for this component. 13 of
these
sites were available to place this component into.
===============================================================
List of 13 available sites in area are:
Site MULT18X18_X1Y3
Site MULT18X18_X1Y5
Site MULT18X18_X1Y12
Site MULT18X18_X1Y15
Site MULT18X18_X1Y19
Site MULT18X18_X2Y4
Site MULT18X18_X2Y6
Site MULT18X18_X2Y8
Site MULT18X18_X2Y12
Site MULT18X18_X2Y16
Site MULT18X18_X2Y19
Site MULT18X18_X2Y20
Site MULT18X18_X2Y22
===============================================================
List of comps in area without same LOC are:
===============================================================
WARNING:place:119 - Unable to find location. MULT component



i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_calc/Mmult_data_i0_a_mul_inst_mu
l
t_2 not placed.
MULT18X18


"i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_calc/Mmult_data_i0_a_mul_inst_m
ult_
2".
COMPGRP "RX.MULT18X18" LOCATE = SITE
"MULT18X18_X1Y23:MULT18X18_X5Y0"
LEVEL 4 ;
Only the one associated with MULT18X18


i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_calc/Mmult_data_i0_a_mul_inst_mu
lt_2
will be looked at.
The AREA group contains 120 possible sites for this component. 13 of
these
sites were available to place this component into.
===============================================================
List of 13 available sites in area are:
Site MULT18X18_X1Y3
Site MULT18X18_X1Y5
Site MULT18X18_X1Y12
Site MULT18X18_X1Y15
Site MULT18X18_X1Y19
Site MULT18X18_X2Y4
Site MULT18X18_X2Y6
Site MULT18X18_X2Y8
Site MULT18X18_X2Y12
Site MULT18X18_X2Y16
Site MULT18X18_X2Y19
Site MULT18X18_X2Y20
Site MULT18X18_X2Y22
===============================================================
List of comps in area without same LOC are:
===============================================================
WARNING:place:119 - Unable to find location. MULT component



i_ofdm_rx/i_wrx_top/i_multipath_top/i_multipath_wk_calc/Mmult__n0010_inst_mu
l
t_3 not placed.
MULT18X18


"i_ofdm_rx/i_wrx_top/i_multipath_top/i_multipath_wk_calc/Mmult__n0010_inst_m
ult_
3".
COMPGRP "RX.MULT18X18" LOCATE = SITE
"MULT18X18_X1Y23:MULT18X18_X5Y0"
LEVEL 4 ;
Only the one associated with MULT18X18


i_ofdm_rx/i_wrx_top/i_multipath_top/i_multipath_wk_calc/Mmult__n0010_inst_mu
lt_3
will be looked at.
The AREA group contains 120 possible sites for this component. 13 of
these
sites were available to place this component into.
===============================================================
List of 13 available sites in area are:
Site MULT18X18_X1Y3
Site MULT18X18_X1Y5
Site MULT18X18_X1Y12
Site MULT18X18_X1Y15
Site MULT18X18_X1Y19
Site MULT18X18_X2Y4
Site MULT18X18_X2Y6
Site MULT18X18_X2Y8
Site MULT18X18_X2Y12
Site MULT18X18_X2Y16
Site MULT18X18_X2Y19
Site MULT18X18_X2Y20
Site MULT18X18_X2Y22
===============================================================
List of comps in area without same LOC are:
===============================================================
WARNING:place:119 - Unable to find location. MULT component



i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_dataqq_mul_inst_mu
l
t_1 not placed.
MULT18X18


"i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_dataqq_mul_inst_m
ult_
1".
COMPGRP "RX.MULT18X18" LOCATE = SITE
"MULT18X18_X1Y23:MULT18X18_X5Y0"
LEVEL 4 ;
Only the one associated with MULT18X18


i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_dataqq_mul_inst_mu
lt_1
will be looked at.
The AREA group contains 120 possible sites for this component. 13 of
these
sites were available to place this component into.
===============================================================
List of 13 available sites in area are:
Site MULT18X18_X1Y3
Site MULT18X18_X1Y5
Site MULT18X18_X1Y12
Site MULT18X18_X1Y15
Site MULT18X18_X1Y19
Site MULT18X18_X2Y4
Site MULT18X18_X2Y6
Site MULT18X18_X2Y8
Site MULT18X18_X2Y12
Site MULT18X18_X2Y16
Site MULT18X18_X2Y19
Site MULT18X18_X2Y20
Site MULT18X18_X2Y22
===============================================================
List of comps in area without same LOC are:
===============================================================
WARNING:place:119 - Unable to find location. MULT component



i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_wki_calc_mul_inst_
m
ult_11 not placed.
MULT18X18


"i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_wki_calc_mul_inst
_mul
t_11".
COMPGRP "RX.MULT18X18" LOCATE = SITE
"MULT18X18_X1Y23:MULT18X18_X5Y0"
LEVEL 4 ;
Only the one associated with MULT18X18


i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_wki_calc_mul_inst_
mult
_11 will be looked at.
The AREA group contains 120 possible sites for this component. 13 of
these
sites were available to place this component into.
===============================================================
List of 13 available sites in area are:
Site MULT18X18_X1Y3
Site MULT18X18_X1Y5
Site MULT18X18_X1Y12
Site MULT18X18_X1Y15
Site MULT18X18_X1Y19
Site MULT18X18_X2Y4
Site MULT18X18_X2Y6
Site MULT18X18_X2Y8
Site MULT18X18_X2Y12
Site MULT18X18_X2Y16
Site MULT18X18_X2Y19
Site MULT18X18_X2Y20
Site MULT18X18_X2Y22
===============================================================
List of comps in area without same LOC are:
===============================================================
WARNING:place:119 - Unable to find location. MULT component



i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_calc/Mmult_data_i0_b_mul_inst_mu
l
t_2 not placed.
MULT18X18


"i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_calc/Mmult_data_i0_b_mul_inst_m
ult_
2".
COMPGRP "RX.MULT18X18" LOCATE = SITE
"MULT18X18_X1Y23:MULT18X18_X5Y0"
LEVEL 4 ;
Only the one associated with MULT18X18


i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_calc/Mmult_data_i0_b_mul_inst_mu
lt_2
will be looked at.
The AREA group contains 120 possible sites for this component. 13 of
these
sites were available to place this component into.
===============================================================
List of 13 available sites in area are:
Site MULT18X18_X1Y3
Site MULT18X18_X1Y5
Site MULT18X18_X1Y12
Site MULT18X18_X1Y15
Site MULT18X18_X1Y19
Site MULT18X18_X2Y4
Site MULT18X18_X2Y6
Site MULT18X18_X2Y8
Site MULT18X18_X2Y12
Site MULT18X18_X2Y16
Site MULT18X18_X2Y19
Site MULT18X18_X2Y20
Site MULT18X18_X2Y22
===============================================================
List of comps in area without same LOC are:
===============================================================
ERROR:place:120 - There were not enough sites to place all selected
components
Phase 6.9 (Checksum:39386fa) REAL time: 27 mins 46 secs

Total REAL time to Placer completion: 27 mins 47 secs
Click to expand...
 
Do you need the 64-bit width of your RAMs at full speed? If you need wide
but can handle a little latency, going 16 bits wide with the BlockRAMs into
64 bits of register would give you the width and depth you need in one
BlockRAM *and* allow access to the accompanying MULT.

This might help - I only scanned it recently...

XAPP229 - Wider Block Memories
http://www.xilinx.com/bvdocs/appnotes/xapp229.pdf


"Kelvin @ SG" <kelvin8157@hotmail.com> wrote in message
news:4096ff41$1@news.starhub.net.sg...
i used core generator to generate the RAMs, and they have 64-depth 64-bit
RAMs,
so I have no much control over how XST implements it in the synthesis.
Actually in
Floor Planner I can see some BRAM and MULT18X18 side by side...

I have replaced 16 multipliers with LUTs implementions from Core
generator...
And it is working now but I am concerned with the slice usage...

Kelvin





"Ken Morrow" <junk@not_morro.co.uk> wrote in message
news:vzrkc.36293$h44.5385972@stones.force9.net...
Kelvin,

You will probably find that some of the multiplier sites are blocked
from
being used due to
some block RAMs having widths of > 18 bits. If so, try to change some of
the
RAMs to
have smaller widths.

I have a design which now uses all 144 of the V2-6000 multipliers, and
most
of the RAMs
without prob. I had to reduce the width of all of the RAMs to 18 bits or
less for the multipliers
to be available for use.

(I was impressed that Mentor Precision automatically used multipliers
built
with LUTs, once it had
used up all the available multipiers).

Good Luck,

Ken,
Morrow Electronics Limited, UK
Currently specialising in FPGA design for 3G.
www.morro.co.uk


"Kelvin @ SG" <kelvin8157@hotmail.com> wrote in message
news:4091f4e6@news.starhub.net.sg...
Hi, there:

I am implementing a partial chip for virtex-2-6000. My module has 116
multipliers, the module is allocated an area group with 120
multipliers.
Later I got 9 multipliers not placed, while the PAR
informs there are 13 available sites for placing them...However, the
placement failed...

How may I handle such a situation?
Replace some smaller * with rtl implementation? How many slices
can
I
implement an 8X8 muldipler?
Repartitioning to put some * signs in somebody else's modules?
Possible
but troublesome...

Best Regards,
Kelvin






Phase 6.9
WARNING:place:119 - Unable to find location. MULT component




i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_wkq_calc_mul_inst_
m
ult_11 not placed.
MULT18X18



"i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_wkq_calc_mul_inst
_mul
t_11".
COMPGRP "RX.MULT18X18" LOCATE = SITE
"MULT18X18_X1Y23:MULT18X18_X5Y0"
LEVEL 4 ;
Only the one associated with MULT18X18



i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_wkq_calc_mul_inst_
mult
_11 will be looked at.
The AREA group contains 120 possible sites for this component. 13 of
these
sites were available to place this component into.
===============================================================
List of 13 available sites in area are:
Site MULT18X18_X1Y3
Site MULT18X18_X1Y5
Site MULT18X18_X1Y12
Site MULT18X18_X1Y15
Site MULT18X18_X1Y19
Site MULT18X18_X2Y4
Site MULT18X18_X2Y6
Site MULT18X18_X2Y8
Site MULT18X18_X2Y12
Site MULT18X18_X2Y16
Site MULT18X18_X2Y19
Site MULT18X18_X2Y20
Site MULT18X18_X2Y22
===============================================================
List of comps in area without same LOC are:
===============================================================
WARNING:place:119 - Unable to find location. MULT component




i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_calc/Mmult_data_q0_b_mul_inst_mu
l
t_2 not placed.
MULT18X18



"i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_calc/Mmult_data_q0_b_mul_inst_m
ult_
2".
COMPGRP "RX.MULT18X18" LOCATE = SITE
"MULT18X18_X1Y23:MULT18X18_X5Y0"
LEVEL 4 ;
Only the one associated with MULT18X18



i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_calc/Mmult_data_q0_b_mul_inst_mu
lt_2
will be looked at.
The AREA group contains 120 possible sites for this component. 13 of
these
sites were available to place this component into.
===============================================================
List of 13 available sites in area are:
Site MULT18X18_X1Y3
Site MULT18X18_X1Y5
Site MULT18X18_X1Y12
Site MULT18X18_X1Y15
Site MULT18X18_X1Y19
Site MULT18X18_X2Y4
Site MULT18X18_X2Y6
Site MULT18X18_X2Y8
Site MULT18X18_X2Y12
Site MULT18X18_X2Y16
Site MULT18X18_X2Y19
Site MULT18X18_X2Y20
Site MULT18X18_X2Y22
===============================================================
List of comps in area without same LOC are:
===============================================================
WARNING:place:119 - Unable to find location. MULT component




i_ofdm_rx/i_wrx_top/i_multipath_top/i_multipath_wk_calc/Mmult__n0009_inst_mu
l
t_3 not placed.
MULT18X18



"i_ofdm_rx/i_wrx_top/i_multipath_top/i_multipath_wk_calc/Mmult__n0009_inst_m
ult_
3".
COMPGRP "RX.MULT18X18" LOCATE = SITE
"MULT18X18_X1Y23:MULT18X18_X5Y0"
LEVEL 4 ;
Only the one associated with MULT18X18



i_ofdm_rx/i_wrx_top/i_multipath_top/i_multipath_wk_calc/Mmult__n0009_inst_mu
lt_3
will be looked at.
The AREA group contains 120 possible sites for this component. 13 of
these
sites were available to place this component into.
===============================================================
List of 13 available sites in area are:
Site MULT18X18_X1Y3
Site MULT18X18_X1Y5
Site MULT18X18_X1Y12
Site MULT18X18_X1Y15
Site MULT18X18_X1Y19
Site MULT18X18_X2Y4
Site MULT18X18_X2Y6
Site MULT18X18_X2Y8
Site MULT18X18_X2Y12
Site MULT18X18_X2Y16
Site MULT18X18_X2Y19
Site MULT18X18_X2Y20
Site MULT18X18_X2Y22
===============================================================
List of comps in area without same LOC are:
===============================================================
WARNING:place:119 - Unable to find location. MULT component




i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_dataii_mul_inst_mu
l
t_1 not placed.
MULT18X18



"i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_dataii_mul_inst_m
ult_
1".
COMPGRP "RX.MULT18X18" LOCATE = SITE
"MULT18X18_X1Y23:MULT18X18_X5Y0"
LEVEL 4 ;
Only the one associated with MULT18X18



i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_dataii_mul_inst_mu
lt_1
will be looked at.
The AREA group contains 120 possible sites for this component. 13 of
these
sites were available to place this component into.
===============================================================
List of 13 available sites in area are:
Site MULT18X18_X1Y3
Site MULT18X18_X1Y5
Site MULT18X18_X1Y12
Site MULT18X18_X1Y15
Site MULT18X18_X1Y19
Site MULT18X18_X2Y4
Site MULT18X18_X2Y6
Site MULT18X18_X2Y8
Site MULT18X18_X2Y12
Site MULT18X18_X2Y16
Site MULT18X18_X2Y19
Site MULT18X18_X2Y20
Site MULT18X18_X2Y22
===============================================================
List of comps in area without same LOC are:
===============================================================
WARNING:place:119 - Unable to find location. MULT component




i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_calc/Mmult_data_i0_a_mul_inst_mu
l
t_2 not placed.
MULT18X18



"i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_calc/Mmult_data_i0_a_mul_inst_m
ult_
2".
COMPGRP "RX.MULT18X18" LOCATE = SITE
"MULT18X18_X1Y23:MULT18X18_X5Y0"
LEVEL 4 ;
Only the one associated with MULT18X18



i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_calc/Mmult_data_i0_a_mul_inst_mu
lt_2
will be looked at.
The AREA group contains 120 possible sites for this component. 13 of
these
sites were available to place this component into.
===============================================================
List of 13 available sites in area are:
Site MULT18X18_X1Y3
Site MULT18X18_X1Y5
Site MULT18X18_X1Y12
Site MULT18X18_X1Y15
Site MULT18X18_X1Y19
Site MULT18X18_X2Y4
Site MULT18X18_X2Y6
Site MULT18X18_X2Y8
Site MULT18X18_X2Y12
Site MULT18X18_X2Y16
Site MULT18X18_X2Y19
Site MULT18X18_X2Y20
Site MULT18X18_X2Y22
===============================================================
List of comps in area without same LOC are:
===============================================================
WARNING:place:119 - Unable to find location. MULT component




i_ofdm_rx/i_wrx_top/i_multipath_top/i_multipath_wk_calc/Mmult__n0010_inst_mu
Click to expand...

l
t_3 not placed.
MULT18X18



"i_ofdm_rx/i_wrx_top/i_multipath_top/i_multipath_wk_calc/Mmult__n0010_inst_m
ult_
3".
COMPGRP "RX.MULT18X18" LOCATE = SITE
"MULT18X18_X1Y23:MULT18X18_X5Y0"
LEVEL 4 ;
Only the one associated with MULT18X18



i_ofdm_rx/i_wrx_top/i_multipath_top/i_multipath_wk_calc/Mmult__n0010_inst_mu
lt_3
will be looked at.
The AREA group contains 120 possible sites for this component. 13 of
these
sites were available to place this component into.
===============================================================
List of 13 available sites in area are:
Site MULT18X18_X1Y3
Site MULT18X18_X1Y5
Site MULT18X18_X1Y12
Site MULT18X18_X1Y15
Site MULT18X18_X1Y19
Site MULT18X18_X2Y4
Site MULT18X18_X2Y6
Site MULT18X18_X2Y8
Site MULT18X18_X2Y12
Site MULT18X18_X2Y16
Site MULT18X18_X2Y19
Site MULT18X18_X2Y20
Site MULT18X18_X2Y22
===============================================================
List of comps in area without same LOC are:
===============================================================
WARNING:place:119 - Unable to find location. MULT component




i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_dataqq_mul_inst_mu
l
t_1 not placed.
MULT18X18



"i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_dataqq_mul_inst_m
ult_
1".
COMPGRP "RX.MULT18X18" LOCATE = SITE
"MULT18X18_X1Y23:MULT18X18_X5Y0"
LEVEL 4 ;
Only the one associated with MULT18X18



i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_dataqq_mul_inst_mu
lt_1
will be looked at.
The AREA group contains 120 possible sites for this component. 13 of
these
sites were available to place this component into.
===============================================================
List of 13 available sites in area are:
Site MULT18X18_X1Y3
Site MULT18X18_X1Y5
Site MULT18X18_X1Y12
Site MULT18X18_X1Y15
Site MULT18X18_X1Y19
Site MULT18X18_X2Y4
Site MULT18X18_X2Y6
Site MULT18X18_X2Y8
Site MULT18X18_X2Y12
Site MULT18X18_X2Y16
Site MULT18X18_X2Y19
Site MULT18X18_X2Y20
Site MULT18X18_X2Y22
===============================================================
List of comps in area without same LOC are:
===============================================================
WARNING:place:119 - Unable to find location. MULT component




i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_wki_calc_mul_inst_
m
ult_11 not placed.
MULT18X18



"i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_wki_calc_mul_inst
_mul
t_11".
COMPGRP "RX.MULT18X18" LOCATE = SITE
"MULT18X18_X1Y23:MULT18X18_X5Y0"
LEVEL 4 ;
Only the one associated with MULT18X18



i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_wk_calc/Mmult_wki_calc_mul_inst_
mult
_11 will be looked at.
The AREA group contains 120 possible sites for this component. 13 of
these
sites were available to place this component into.
===============================================================
List of 13 available sites in area are:
Site MULT18X18_X1Y3
Site MULT18X18_X1Y5
Site MULT18X18_X1Y12
Site MULT18X18_X1Y15
Site MULT18X18_X1Y19
Site MULT18X18_X2Y4
Site MULT18X18_X2Y6
Site MULT18X18_X2Y8
Site MULT18X18_X2Y12
Site MULT18X18_X2Y16
Site MULT18X18_X2Y19
Site MULT18X18_X2Y20
Site MULT18X18_X2Y22
===============================================================
List of comps in area without same LOC are:
===============================================================
WARNING:place:119 - Unable to find location. MULT component




i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_calc/Mmult_data_i0_b_mul_inst_mu
l
t_2 not placed.
MULT18X18



"i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_calc/Mmult_data_i0_b_mul_inst_m
ult_
2".
COMPGRP "RX.MULT18X18" LOCATE = SITE
"MULT18X18_X1Y23:MULT18X18_X5Y0"
LEVEL 4 ;
Only the one associated with MULT18X18



i_ofdm_rx/i_wrx_top/i_channel_top/i_channel_calc/Mmult_data_i0_b_mul_inst_mu
lt_2
will be looked at.
The AREA group contains 120 possible sites for this component. 13 of
these
sites were available to place this component into.
===============================================================
List of 13 available sites in area are:
Site MULT18X18_X1Y3
Site MULT18X18_X1Y5
Site MULT18X18_X1Y12
Site MULT18X18_X1Y15
Site MULT18X18_X1Y19
Site MULT18X18_X2Y4
Site MULT18X18_X2Y6
Site MULT18X18_X2Y8
Site MULT18X18_X2Y12
Site MULT18X18_X2Y16
Site MULT18X18_X2Y19
Site MULT18X18_X2Y20
Site MULT18X18_X2Y22
===============================================================
List of comps in area without same LOC are:
===============================================================
ERROR:place:120 - There were not enough sites to place all selected
components
Phase 6.9 (Checksum:39386fa) REAL time: 27 mins 46 secs

Total REAL time to Placer completion: 27 mins 47 secs
Click to expand...
 
"Kelvin @ SG" <kelvin8157@hotmail.com> wrote in message news:<4096ff41$1@news.starhub.net.sg>...
i used core generator to generate the RAMs, and they have 64-depth
64-bit RAMs, so I have no much control over how XST implements it in
the synthesis.
Click to expand...
If you want to force the core generator to use x16 BRAMs just tell it
that you want a ram that is 1K deep, as it will be forced to build it
from 1K x 16 BRAMs. We have generally found that it is easier to
instantiate primitives (i.e. BRAMs) in the VHDL with loops, than it
is to use the core generator for things like memories. When you use
core generator to make a memory, XST is really just treating it as a
black box.


I have replaced 16 multipliers with LUTs implementions from Core
generator... And it is working now but I am concerned with the slice
usage...
Click to expand...
It might make more sense to use SelectRAMs rather than BRAMs for the
rather shallow memories. This will use slices to build the memories,
but may be a better trade off than using slices for the multipliers.
You did mention 8x8 multipliers in your original posts, so this is
probably not the case.


Regards,
Erik Widding.

---
Birger Engineering, Inc. -------------------------------- 617.695.9233
100 Boylston St #1070; Boston, MA 02116 -------- http://www.birger.com
 
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