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| author | Eddie Hung <eddie@fpgeh.com> | 2019-05-21 16:19:45 -0700 |
|---|---|---|
| committer | Eddie Hung <eddie@fpgeh.com> | 2019-05-21 16:19:45 -0700 |
| commit | ee8435b820bbea4a4ceb2c46a81de9d03d4aa44c (patch) | |
| tree | 15c24a82884ffd0fabdd24ddfc48e2c16b08d583 /techlibs/xilinx/abc.box | |
| parent | 0f094fba08b69baa2329e749daf19f41a624a0a0 (diff) | |
| download | yosys-ee8435b820bbea4a4ceb2c46a81de9d03d4aa44c.tar.gz yosys-ee8435b820bbea4a4ceb2c46a81de9d03d4aa44c.tar.bz2 yosys-ee8435b820bbea4a4ceb2c46a81de9d03d4aa44c.zip | |
Instead of MUXCY/XORCY use CARRY4 (with timing)
Diffstat (limited to 'techlibs/xilinx/abc.box')
| -rw-r--r-- | techlibs/xilinx/abc.box | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/techlibs/xilinx/abc.box b/techlibs/xilinx/abc.box index d572817df..57ea1670c 100644 --- a/techlibs/xilinx/abc.box +++ b/techlibs/xilinx/abc.box @@ -1,5 +1,4 @@ -# Max delays from https://pastebin.com/v2hrcksd -# from https://github.com/SymbiFlow/prjxray/pull/706#issuecomment-479380321 +# Max delays from https://github.com/SymbiFlow/prjxray-db/blob/34ea6eb08a63d21ec16264ad37a0a7b142ff6031/artix7/timings/CLBLL_L.sdf # F7BMUX slower than F7AMUX # Inputs: I0 I1 S0 @@ -12,8 +11,17 @@ F7BMUX 1 1 3 1 MUXF8 2 1 3 1 104 94 273 -MUXCY 3 1 3 1 -1 1 1 - -XORCY 4 1 2 1 -1 1 +# CARRY4 + CARRY4_[ABCD]X +# Inputs: CI CYINIT DI0 DI1 DI2 DI3 S0 S1 S2 S3 +# Outputs: CO0 CO1 CO2 CO3 O0 O1 O2 O3 +CARRY4 3 1 10 8 +271 157 228 114 222 334 239 313 +536 494 592 580 482 598 584 642 +379 465 540 526 - 407 556 615 +- 445 520 507 - - 537 596 +- - 356 398 - - - 438 +- - - 385 - - - - +340 433 512 508 223 400 523 582 +- 469 548 528 - 205 558 618 +- - 292 376 - - 226 330 +- - - 380 - - - 227 |