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 # New functions for software emulation
  26 fp128_ppc_funcs         = floattikf floatuntikf fixkfti fixunskfti \
  27                           extendkftf2-sw trunctfkf2-sw \
  28                           sfp-exceptions _mulkc3 _divkc3
  29
  30 fp128_ppc_src           = $(addprefix $(srcdir)/config/rs6000/,$(addsuffix \
  31                                 .c,$(fp128_ppc_funcs)))
  32 fp128_ppc_static_obj    = $(addsuffix $(objext),$(fp128_ppc_funcs))
  33 fp128_ppc_shared_obj    = $(addsuffix _s$(objext),$(fp128_ppc_funcs))
  34 fp128_ppc_obj           = $(fp128_ppc_static_obj) $(fp128_ppc_shared_obj)
  35
  36 # All functions
  37 fp128_funcs             = $(fp128_softfp_funcs) $(fp128_ppc_funcs) \
  38                           $(fp128_hw_funcs) $(fp128_ifunc_funcs)
  39
  40 fp128_src               = $(fp128_softfp_src) $(fp128_ppc_src) \
  41                           $(fp128_hw_src) $(fp128_ifunc_src)
  42
  43 fp128_obj               = $(fp128_softfp_obj) $(fp128_ppc_obj) \
  44                           $(fp128_hw_obj) $(fp128_ifunc_obj)
  45
  46 fp128_sed               = $(srcdir)/config/rs6000/float128-sed$(fp128_sed_hw)
  47 fp128_dep               = $(fp128_sed) $(srcdir)/config/rs6000/t-float128
  48
  49 fp128_includes          = $(srcdir)/soft-fp/double.h \
  50                           $(srcdir)/soft-fp/op-1.h \
  51                           $(srcdir)/soft-fp/op-4.h \
  52                           $(srcdir)/soft-fp/op-common.h \
  53                           $(srcdir)/soft-fp/single.h \
  54                           $(srcdir)/soft-fp/extended.h \
  55                           $(srcdir)/soft-fp/op-2.h \
  56                           $(srcdir)/soft-fp/op-8.h \
  57                           $(srcdir)/soft-fp/quad.h \
  58                           $(srcdir)/soft-fp/soft-fp.h
  59
  60 # Build the emulator without ISA 3.0 hardware support.
  61 FP128_CFLAGS_SW          = -Wno-type-limits -mvsx -mfloat128 \
  62                            -mno-float128-hardware \
  63                            -I$(srcdir)/soft-fp \
  64                            -I$(srcdir)/config/rs6000 \
  65                            $(FLOAT128_HW_INSNS)
  66
  67 $(fp128_softfp_obj)      : INTERNAL_CFLAGS += $(FP128_CFLAGS_SW)
  68 $(fp128_ppc_obj)         : INTERNAL_CFLAGS += $(FP128_CFLAGS_SW)
  69 $(fp128_obj)             : $(fp128_includes)
  70 $(fp128_obj)             : $(srcdir)/config/rs6000/quad-float128.h
  71
  72 $(fp128_softfp_src) : $(srcdir)/soft-fp/$(subst -sw,,$(subst kf,tf,$@)) $(fp128_dep)
  73         @src="$(srcdir)/soft-fp/$(subst -sw,,$(subst kf,tf,$@))"; \
  74         echo "Create $@"; \
  75         (echo "/* file created from $$src */"; \
  76          echo; \
  77          sed -f $(fp128_sed) < $$src) > $@
  78
  79 .PHONY: test clean-float128
  80
  81 test:
  82         @echo "fp128_src:"; \
  83         for x in $(fp128_src); do echo "    $$x"; done; \
  84         echo; \
  85         echo "fp128_obj:"; \
  86         for x in $(fp128_obj); do echo "    $$x"; done;
  87
  88 clean-float128:
  89         -rm -f $(fp128_softfp_src) $(fp128_hardfp_src)
  90         @$(MULTICLEAN) multi-clean DO=clean-float128
  91
  92 # For now, only put it in the static library
  93 # LIB2ADD += $(fp128_src)
  94
  95 LIB2ADD_ST += $(fp128_src)