APD

• It is a 64-bit dual-issue out-of-order RISC-V processor, develop with systemverilog. It has 2 level PAg branch predictor, 2-level cache system, mmu, csr, precise exception support, reorder buffer...
• Some of the units, like decoder, mmu, csr, divider are referred to the open-source project cva6
• On the Master banch is a single-issue, in-order processor, on the single-issue-out-of-order branch is a single issue out-of-order backend processor, on the order-of-order branch is a dual-issue out-of-order backend processor.

Build

You can build it by make verilator or make vcs in tb folder,

Run

You can check the Makefile in tb folder to check out the isa test, random instruction test, and other benchmarks

Performance

Dhrystone

Microseconds for one run through Dhrystone: 403
Dhrystones per Second:                      2480
Dhrystones           :                      500
mcycle = 201581
minstret = 196029

Coremark

2K performance run parameters for coremark.
CoreMark Size    : 666
Total ticks      : 7019307
Total time (secs): 7
Iterations/Sec   : 2
Iterations       : 20
Compiler version : GCC9.2.0
Compiler flags   : -O2 -DPREALLOCATE=1 -mcmodel=medany -static -std=gnu99 -ffast-math -fno-common -fno-builtin-printf -DPERFORMANCE_RUN=1  -static -nostdlib -nostartfiles -lm -lgcc -Tsimple/test.ld
Memory location  : STACK
seedcrc          : 0xe9f5
[0]crclist       : 0xe714
[0]crcmatrix     : 0x1Wd7
[0]crcstate      : 0x8W3W
[0]crcfinal      : 0x4983

Embench-iot

Case	instr count	cycle count	IPC
aha-mont64	1921325	1800957	1.066836
crc32	4208550	4530455	0.928946
edn	3607138	4123324	0.874813
huffbench	2770587	2738136	1.011851
matmult-int	4218803	3288457	0.779476
nettle-aes	5368337	3178037	1.689199
nettle-sha256	4095101	2375880	1.723614
nsichneu	2552992	2869209	0.889789
picojpeg	4368532	3114160	1.402796
sglib-combined	2648206	3053468	0.867278