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README.md

Synthesis results for the PicoRV32 core (in its default configuration) with Yosys 0.5+383 (git sha1 8648089), Synplify Pro and Lattice LSE from iCEcube2.2014.08, and Xilinx Vivado 2015.3.

No timing constraints were used for synthesis; only resource utilisation is compared.

Last updated: 2015-10-30

Results for iCE40 Synthesis

Cell Yosys Synplify Pro Lattice LSE
SB_CARRY 405 349 309
SB_DFF 125 256 114
SB_DFFE 251 268 76
SB_DFFESR 172 39 147
SB_DFFESS 1 0 69
SB_DFFSR 69 137 134
SB_DFFSS 0 0 36
SB_LUT4 1795 1657 1621
SB_RAM40_4K 4 4 4

Summary:

Cell Yosys Synplify Pro Lattice LSE
SB_CARRY 405 349 309
SB_DFF* 618 700 576
SB_LUT4 1795 1657 1621
SB_RAM40_4K 4 4 4

Results for Xilinx 7-Series Synthesis

Cell Yosys Vivado
FDRE 671 553
FDSE 0 21
LUT1 41 160
LUT2 517 122
LUT3 77 120
LUT4 136 204
LUT5 142 135
LUT6 490 405
MUXF7 54 0
MUXF8 15 0
MUXCY 420 0
XORCY 359 0
CARRY4 0 83
RAMD32 0 72
RAMS32 0 24
RAM64X1D 64 0

Summary:

Cell Yosys Vivado
FD* 671 574
LUT* 1403 1146