libgcc/config/rs6000/t-float128

   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)