add retrofw target

[Poligraf]

Retrofw is a OD like CFW running on the jz4760 chipsets and retroarch already has retrofw as a target.

Retrofw is almost identical to OD jz4770 in most respects, except that the chipset is half as powerful.

I would like to add retrofw as a target to CI to your excellent gearboy core which is by far my favorite gb core.

I will definetely add gearcoleco in the near future as well.

Thank you in advance

[drhelius]

Awesome! Thanks for your effort.

If you want to contribute this to Gearsystem and Gearcoleco I’ll be more than happy to accept the PR.

[Poligraf]

No problem about gearsystem and gearcoleco.
Not sure the CPU is fast enough for gearsystem yet but will find out.

[Poligraf]

I threw as many flags as I could on gearsystem including Ofast but I still am running at around 55-58 fps without rewind

  TARGET := $(TARGET_NAME)_libretro.so
  CC = /opt/retrofw-toolchain/usr/bin/mipsel-linux-gcc
  CXX = /opt/retrofw-toolchain/usr/bin/mipsel-linux-g++
  AR = /opt/retrofw-toolchain/usr/bin/mipsel-linux-ar
  fpic := -fPIC
  SHARED := -shared -Wl,-version-script=$(CORE_DIR)/link.T
  PLATFORM_DEFINES := -DCC_RESAMPLER -DCC_RESAMPLER_NO_HIGHPASS
  LDFLAGS += -flto -mplt 
  CFLAGS += -fomit-frame-pointer -ffast-math -march=mips32 -mtune=mips32 -mhard-float
  CFLAGS += -falign-functions=1 -falign-jumps=1 -falign-loops=1
  CFLAGS += -fomit-frame-pointer -fmerge-all-constants -flto
  CFLAGS += -funsafe-math-optimizations -fsingle-precision-constant -fexpensive-optimizations
  CFLAGS += -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-unroll-loops
  CFLAGS += -fmerge-all-constants -fno-math-errno -fno-stack-protector -fno-ident    
  CXXFLAGS += $(CFLAGS)
	```

[drhelius]

You can try adding the following definition:

-DPERFORMANCE

It will sacrifice accuracy for a bit of performance.

[Poligraf]

Oooo nifty. Trying it now. Like I said for sms which has some great platformers I am of the opinion that it must lock at 60.
Playing sonic at 58 fps is just.....horrible you feel those 2 frames