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Do not offset FD* box timings due to -46ps Tsu

This commit is contained in:
Eddie Hung 2019-12-27 12:03:19 -08:00
parent 3cbbae251f
commit eb4e767053
1 changed files with 21 additions and 12 deletions
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33
techlibs/xilinx/abc9_xc7.box
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@ -53,50 +53,59 @@ $__ABC9_ASYNC0 1000 1 2 1
$__ABC9_ASYNC1 1001 1 2 1
0 764
# The following FD*.{CE,R,CLR,PRE) are offset by 46ps to
# reflect the -46ps Tsu
# https://github.com/SymbiFlow/prjxray-db/blob/23c8b0851f979f0799318eaca90174413a46b257/artix7/timings/slicel.sdf#L237-L251
# https://github.com/SymbiFlow/prjxray-db/blob/23c8b0851f979f0799318eaca90174413a46b257/artix7/timings/slicel.sdf#L265-L277
# Max delays from https://github.com/SymbiFlow/prjxray-db/blob/23c8b0851f979f0799318eaca90174413a46b257/artix7/timings/slicel.sdf#L237-L251
# https://github.com/SymbiFlow/prjxray-db/blob/23c8b0851f979f0799318eaca90174413a46b257/artix7/timings/slicel.sdf#L265-L277
# NB: Inputs/Outputs must be ordered alphabetically
# (with exception for \$currQ)
# Inputs: C CE D R \$currQ
# Outputs: Q
FDRE 1100 1 5 1
0 151 0 446 0
#0 109 -46 404 0
0 109 0 404 0 # Clamp -46ps Tsu
# Inputs: C CE D R \$currQ
# Outputs: Q
FDRE_1 1101 1 5 1
0 151 0 446 0
#0 109 0 -46 404
0 109 0 0 404 # Clamp -46ps Tsu
# Inputs: C CE CLR D \$currQ
# Outputs: Q
FDCE 1102 1 5 1
0 151 806 0 0
#0 109 764 -46 0
0 109 764 0 0 # Clamp -46ps Tsu
# Inputs: C CE CLR D \$currQ
# Outputs: Q
FDCE_1 1103 1 5 1
0 151 806 0 0
#0 109 764 -46 0
0 109 764 0 0 # Clamp -46ps Tsu
# Inputs: C CE D PRE \$currQ
# Outputs: Q
FDPE 1104 1 5 1
0 151 0 806 0
#0 109 -46 764 0
0 109 0 764 0 # Clamp -46ps Tsu
# Inputs: C CE D PRE \$currQ
# Outputs: Q
FDPE_1 1105 1 5 1
0 151 0 806 0
#0 109 -46 764 0
0 109 0 764 0 # Clamp -46ps Tsu
# Inputs: C CE D S \$currQ
# Outputs: Q
FDSE 1106 1 5 1
0 151 0 446 0
#0 109 -46 446 0
0 109 0 446 0 # Clamp -46ps Tsu
# Inputs: C CE D S \$currQ
# Outputs: Q
FDSE_1 1107 1 5 1
0 151 0 446 0
#0 109 -46 446 0
0 109 0 446 0 # Clamp -46ps Tsu
# SLICEM/A6LUT
# Box to emulate comb/seq behaviour of RAMD{32,64} and SRL{16,32}