Re: [PATCH 02/60] microblaze_v4: Makefiles for Microblaze cpu

[Adrian Bunk]

On Thu, Jun 26, 2008 at 02:29:31PM +0200, monstr@xxxxxxxxx wrote:
>...
> --- /dev/null
> +++ b/arch/microblaze/Makefile
>...
> +# Work out HW multipler support.  This is icky.
> +# 1. Spartan2 has no HW multiplers.
> +# 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 ($(CPU_MAJOR),3)
> +    CPUFLAGS-1 += -mno-xl-soft-mul
> +  else
> +    # USE_HW_MUL can be 0, 1, or 2, defining a heirarchy of HW Mul support.
> +    CPUFLAGS-$(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) += -mxl-pattern-compare
> +
> +CPUFLAGS-1 += $(call cc-option,-mcpu=v$(CPU_VER))
> +
> +# The various CONFIG_XILINX cpu features options are integers 0/1/2...
> +# rather than bools y/n
> +CFLAGS += $(CPUFLAGS-1)
> +CFLAGS += $(CPUFLAGS-2)
>...

Why are the options not bools?

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

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