diff --git a/benchmarks/coremark/Makefile b/benchmarks/coremark/Makefile
index 81c2b0959..db8a6e1d6 100644
--- a/benchmarks/coremark/Makefile
+++ b/benchmarks/coremark/Makefile
@@ -11,11 +11,13 @@ sources=$(cmbase)/core_main.c $(cmbase)/core_list_join.c $(cmbase)/coremark.h  \
 	$(PORT_DIR)/core_portme.h $(PORT_DIR)/core_portme.c $(PORT_DIR)/core_portme.mak \
 	$(PORT_DIR)/crt.S $(PORT_DIR)/encoding.h $(PORT_DIR)/util.h $(PORT_DIR)/syscalls.c
 ABI := $(if $(findstring "64","$(XLEN)"),lp64,ilp32)
+ARCH := rv$(XLEN)im_zicsr_zba_zbb_zbc_zbs
 #ARCH := rv$(XLEN)gc_zba_zbb_zbc_zbs
 #ARCH := rv$(XLEN)gc
-ARCH := rv$(XLEN)imc_zicsr
+#ARCH := rv$(XLEN)imc_zicsr
 #ARCH := rv$(XLEN)im_zicsr
 #ARCH := rv$(XLEN)i_zicsr
+
 PORT_CFLAGS = -g -mabi=$(ABI) -march=$(ARCH) -static -falign-functions=16 \
 	-mbranch-cost=1 -DSKIP_DEFAULT_MEMSET -mtune=sifive-3-series -O3 -finline-functions -falign-jumps=4 \
 	-fno-delete-null-pointer-checks -fno-rename-registers --param=loop-max-datarefs-for-datadeps=0 \
@@ -23,6 +25,24 @@ PORT_CFLAGS = -g -mabi=$(ABI) -march=$(ARCH) -static -falign-functions=16 \
 	-nostdlib -nostartfiles -ffreestanding -mstrict-align \
 	-DTOTAL_DATA_SIZE=2000 -DMAIN_HAS_NOARGC=1 -DPERFORMANCE_RUN=1 -DITERATIONS=10 -DXLEN=$(XLEN) 
 
+# Black Parrott
+#PORT_CFLAGS = -O2 -fno-common -funroll-loops -finline-functions --param max-inline-insns-auto=20 -falign-functions=4 -falign-jumps=4 -falign-loops=4 \
+	-DITERATIONS=10 -DPERFORMANCE_RUN=1
+#OPTIMIZE := -O2 -fno-common -funroll-loops -finline-functions --param max-inline-insns-auto=20 -falign-functions=4 -falign-jumps=4 -falign-loops=4
+#override CFLAGS += $(OPTIMIZE) -DFLAGS_STR=\""$(OPTIMIZE)"\"
+#override CFLAGS += -DITERATIONS=10 -DPERFORMANCE_RUN=1
+
+# try adding the new fields from muntjac coremark build
+#PORT_CFLAGS = -g -mabi=$(ABI) -march=$(ARCH) -static  -falign-functions=16 \
+	-fno-common -flto -funswitch-loops -mcmodel=medany \
+	-falign-functions=4 -falign-jumps=4 -falign-loops=4  \
+	-mbranch-cost=1 -DSKIP_DEFAULT_MEMSET -mtune=sifive-3-series -O3 -finline-functions --param max-inline-insns-auto=20 -falign-jumps=4 \
+	-fno-delete-null-pointer-checks -fno-rename-registers --param=loop-max-datarefs-for-datadeps=0 \
+	-funroll-all-loops --param=uninlined-function-insns=8 -fno-tree-vrp -fwrapv -fipa-pta \
+	-nostdlib -nostartfiles -ffreestanding -mstrict-align \
+	-DTOTAL_DATA_SIZE=2000 -DMAIN_HAS_NOARGC=1 -DPERFORMANCE_RUN=1 -DITERATIONS=10 -DXLEN=$(XLEN) 
+
+
 all: $(work_dir)/coremark.bare.riscv.elf.memfile
 
 run: