# This flavour enables some extra optimizations, though these options may

# not work everywhere or may not be benefical in all cases.

# Start with generic optimisation flags.

include build/flavour-opt.mk

# Add CPU specific optimization flags:

#  march=native is only supported starting from gcc-4.2.x

#  comment out this line if you're compiling on an older gcc version

CXXFLAGS+=-march=native -mtune=native

# Use computed goto's to speedup Z80 emulation:

# - Computed goto's are a gcc extension, it's not part of the official c++

#   standard. So this will only work if you use gcc as your compiler (it

#   won't work with visual c++ for example)

# - This is only beneficial on CPUs with branch prediction for indirect jumps

#   and a reasonable amout of cache. For example it is very benefical for a

#   intel core2 cpu (10% faster), but not for a ARM920 (a few percent slower)

# - Compiling src/cpu/CPUCore.cc with computed goto's enabled is very demanding

#   on the compiler. On older gcc versions it requires upto 1.5GB of memory.

#   But even on more recent gcc versions it still requires around 700MB.

CXXFLAGS+=-DUSE_COMPUTED_GOTO