# What CPU version are we building for, and crack it open # as major.minor.rev
CPU_VER := $(CONFIG_XILINX_MICROBLAZE0_HW_VER)
CPU_MAJOR := $(word 1, $(subst ., , $(CPU_VER)))
CPU_MINOR := $(word 2, $(subst ., , $(CPU_VER)))
CPU_REV := $(word 3, $(subst ., , $(CPU_VER)))
export CPU_VER CPU_MAJOR CPU_MINOR CPU_REV
# Use cpu-related CONFIG_ vars to set compile options. # The various CONFIG_XILINX cpu features options are integers 0/1/2... # rather than bools y/n
# Work out HW multipler support. This is tricky. # 1. Spartan2 has no HW multipliers. # 2. MicroBlaze v3.x always uses them, except in Spartan 2 # 3. All other FPGa/CPU ver combos, we can trust the CONFIG_ settings
ifeq (,$(findstring spartan2,$(CONFIG_XILINX_MICROBLAZE0_FAMILY)))
ifeq ($(CPU_MAJOR),3)
CPUFLAGS-1 += -mno-xl-soft-mul else # USE_HW_MUL can be 0, 1, or 2, defining a hierarchy of HW Mul support.
CPUFLAGS-$(subst 1,,$(CONFIG_XILINX_MICROBLAZE0_USE_HW_MUL)) += -mxl-multiply-high
CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_HW_MUL) += -mno-xl-soft-mul
endif
endif
CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_DIV) += -mno-xl-soft-div
CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_BARREL) += -mxl-barrel-shift
CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_PCMP_INSTR) += -mxl-pattern-compare