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      1 # Support for adding __float128 to the powerpc.
      2 
      3 # The standard 128-bit floating point support functions are TFmode.  Most
      4 # PowerPC targets use a long double format that has a pair of doubles to give
      5 # you more precision, but no extra expoenent range.  This long double format is
      6 # mostly compatible with the format used by the IBM XL compilers.  Some of the
      7 # names used by the IBM double-double format use TF in them, so we rename
      8 # all of the functions provided for the new IEEE 128-bit support.
      9 #
     10 # We use the TF functions in soft-fp for 128-bit floating point support, using
     11 # sed to transform the names in the files from TF names to KF names.
     12 
     13 # Emulator functions from the soft-fp directory
     14 fp128_softfp_funcs	= addkf3 subkf3 mulkf3 divkf3 negkf2 \
     15 			  unordkf2 eqkf2 gekf2 lekf2 \
     16 			  extendsfkf2 extenddfkf2 trunckfsf2 trunckfdf2 \
     17 			  fixkfsi fixkfdi fixunskfsi fixunskfdi \
     18 			  floatsikf floatdikf floatunsikf floatundikf
     19 
     20 fp128_softfp_src	= $(addsuffix -sw.c,$(fp128_softfp_funcs))
     21 fp128_softfp_static_obj	= $(addsuffix -sw$(objext),$(fp128_softfp_funcs))
     22 fp128_softfp_shared_obj	= $(addsuffix -sw_s$(objext),$(fp128_softfp_funcs))
     23 fp128_softfp_obj	= $(fp128_softfp_static_obj) $(fp128_softfp_shared_obj)
     24 
     25 # Decimal <-> _Float128 conversions
     26 fp128_dec_funcs		= _kf_to_sd _kf_to_dd _kf_to_td \
     27 			  _sd_to_kf _dd_to_kf _td_to_kf
     28 
     29 # Decimal <-> __ibm128 conversions
     30 ibm128_dec_funcs	= _tf_to_sd _tf_to_dd _tf_to_td \
     31 			  _sd_to_tf _dd_to_tf _td_to_tf
     32 
     33 # New functions for software emulation
     34 fp128_ppc_funcs		= floattikf-sw floatuntikf-sw \
     35 			  fixkfti-sw fixunskfti-sw \
     36 			  extendkftf2-sw trunctfkf2-sw \
     37 			  sfp-exceptions _mulkc3 _divkc3 _powikf2
     38 
     39 ifeq ($(decimal_float),yes)
     40 fp128_ppc_funcs        += $(fp128_dec_funcs)
     41 endif
     42 
     43 fp128_ppc_src		= $(addprefix $(srcdir)/config/rs6000/,$(addsuffix \
     44 				.c,$(fp128_ppc_funcs)))
     45 fp128_ppc_static_obj	= $(addsuffix $(objext),$(fp128_ppc_funcs))
     46 fp128_ppc_shared_obj	= $(addsuffix _s$(objext),$(fp128_ppc_funcs))
     47 fp128_ppc_obj		= $(fp128_ppc_static_obj) $(fp128_ppc_shared_obj)
     48 
     49 # All functions
     50 fp128_funcs		= $(fp128_softfp_funcs) $(fp128_ppc_funcs) \
     51 			  $(fp128_hw_funcs) $(fp128_ifunc_funcs) \
     52 			  $(fp128_3_1_hw_funcs)
     53 
     54 fp128_src		= $(fp128_softfp_src) $(fp128_ppc_src) \
     55 			  $(fp128_hw_src) $(fp128_ifunc_src) \
     56 			  $(fp128_3_1_hw_src)
     57 
     58 fp128_obj		= $(fp128_softfp_obj) $(fp128_ppc_obj) \
     59 			  $(fp128_hw_obj) $(fp128_ifunc_obj) \
     60 			  $(fp128_3_1_hw_obj)
     61 
     62 fp128_sed		= $(srcdir)/config/rs6000/float128-sed$(fp128_sed_hw)
     63 fp128_dep		= $(fp128_sed) $(srcdir)/config/rs6000/t-float128
     64 
     65 fp128_includes		= $(srcdir)/soft-fp/double.h \
     66 			  $(srcdir)/soft-fp/op-1.h \
     67 			  $(srcdir)/soft-fp/op-4.h \
     68 			  $(srcdir)/soft-fp/op-common.h \
     69 			  $(srcdir)/soft-fp/single.h \
     70 			  $(srcdir)/soft-fp/extended.h \
     71 			  $(srcdir)/soft-fp/op-2.h \
     72 			  $(srcdir)/soft-fp/op-8.h \
     73 			  $(srcdir)/soft-fp/quad.h \
     74 			  $(srcdir)/soft-fp/soft-fp.h
     75 
     76 # Build the emulator without ISA 3.0 hardware support.
     77 FP128_CFLAGS_SW		 = -Wno-type-limits -mvsx -mfloat128 \
     78 			   -mno-float128-hardware -mno-gnu-attribute \
     79 			   -I$(srcdir)/soft-fp \
     80 			   -I$(srcdir)/config/rs6000 \
     81 			   $(FLOAT128_HW_INSNS)
     82 
     83 $(fp128_softfp_obj)	 : INTERNAL_CFLAGS += $(FP128_CFLAGS_SW)
     84 $(fp128_ppc_obj)	 : INTERNAL_CFLAGS += $(FP128_CFLAGS_SW)
     85 $(fp128_obj)		 : $(fp128_includes)
     86 $(fp128_obj)		 : $(srcdir)/config/rs6000/quad-float128.h
     87 
     88 # Force the TF mode to/from decimal functions to be compiled with IBM long
     89 # double.  Add building the KF mode to/from decimal conversions with explict
     90 # IEEE long double.
     91 fp128_dec_objs		= $(addsuffix $(objext),$(fp128_dec_funcs)) \
     92 			  $(addsuffix _s$(objext),$(fp128_dec_funcs))
     93 
     94 ibm128_dec_objs		= $(addsuffix $(objext),$(ibm128_dec_funcs)) \
     95 			  $(addsuffix _s$(objext),$(ibm128_dec_funcs))
     96 
     97 FP128_CFLAGS_DECIMAL	= -mno-gnu-attribute -Wno-psabi -mabi=ieeelongdouble
     98 IBM128_CFLAGS_DECIMAL	= -mno-gnu-attribute -Wno-psabi -mabi=ibmlongdouble
     99 
    100 $(fp128_dec_objs)	: INTERNAL_CFLAGS += $(FP128_CFLAGS_DECIMAL)
    101 $(ibm128_dec_objs)	: INTERNAL_CFLAGS += $(IBM128_CFLAGS_DECIMAL)
    102 
    103 $(fp128_softfp_src) : $(srcdir)/soft-fp/$(subst -sw,,$(subst kf,tf,$@)) $(fp128_dep)
    104 	@src="$(srcdir)/soft-fp/$(subst -sw,,$(subst kf,tf,$@))"; \
    105 	echo "Create $@"; \
    106 	(echo "/* file created from $$src */"; \
    107 	 echo; \
    108 	 sed -f $(fp128_sed) < $$src) > $@
    109 
    110 .PHONY: test clean-float128
    111 
    112 test:
    113 	@echo "fp128_src:"; \
    114 	for x in $(fp128_src); do echo "    $$x"; done; \
    115 	echo; \
    116 	echo "fp128_obj:"; \
    117 	for x in $(fp128_obj); do echo "    $$x"; done;
    118 
    119 clean-float128:
    120 	-rm -f $(fp128_softfp_src) $(fp128_hardfp_src)
    121 	@$(MULTICLEAN) multi-clean DO=clean-float128
    122 
    123 # For now, only put it in the static library
    124 # LIB2ADD += $(fp128_src)
    125 
    126 LIB2ADD_ST += $(fp128_src)
    127