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Now we finally have the infrastructure in place we can now derive details of the FPU from a CPU entry. This patch enables this for the existing cores that already have an explicit FPU in their product names. * arm-fpus.def: Add CNAME field to all FPU definitions. * genopt.sh: Use explicit enumeration tags for FPU entries. * arm-tables.opt: Regenerated. * arm.opt (mfpu): Provide initial value. * arm-opts.h (enum fpu_type): Build the enumeration from the list of available FPUs. Add 'auto' entry on the end. * arm.c (arm_configure_build_target): Only do explicit configuration of the FPU features if the selected FPU is not 'auto'. (arm_option_override): Adjust initialization of arm_fpu_index. Emit an error if we have a hard float ABI request, but the processor does not support floating-point. (arm_option_print): Handle -mfpu=auto. (arm_valid_target_attribute_rec): Don't permit fpu=auto in pragmas or function attributes. (arm_identify_fpu_from_isa): Handle effective soft-float when the FPU is automatically detected. * arm-cores.def (arm1136jf-s): Add feature ISA_FP_DBL. (arm1176jzf-s): Likewise. (mpcore): Likewise. (arm1156t2f-s): Likewise. From-SVN: r243716
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