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 14fp128_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 20fp128_softfp_src = $(addsuffix -sw.c,$(fp128_softfp_funcs)) 21fp128_softfp_static_obj = $(addsuffix -sw$(objext),$(fp128_softfp_funcs)) 22fp128_softfp_shared_obj = $(addsuffix -sw_s$(objext),$(fp128_softfp_funcs)) 23fp128_softfp_obj = $(fp128_softfp_static_obj) $(fp128_softfp_shared_obj) 24 25# Decimal <-> _Float128 conversions 26fp128_dec_funcs = _kf_to_sd _kf_to_dd _kf_to_td \ 27 _sd_to_kf _dd_to_kf _td_to_kf 28 29# Decimal <-> __ibm128 conversions 30ibm128_dec_funcs = _tf_to_sd _tf_to_dd _tf_to_td \ 31 _sd_to_tf _dd_to_tf _td_to_tf 32 33# New functions for software emulation 34fp128_ppc_funcs = floattikf-sw floatuntikf-sw \ 35 fixkfti-sw fixunskfti-sw \ 36 extendkftf2-sw trunctfkf2-sw \ 37 sfp-exceptions _mulkc3 _divkc3 _powikf2 38 39ifeq ($(decimal_float),yes) 40fp128_ppc_funcs += $(fp128_dec_funcs) 41endif 42 43fp128_ppc_src = $(addprefix $(srcdir)/config/rs6000/,$(addsuffix \ 44 .c,$(fp128_ppc_funcs))) 45fp128_ppc_static_obj = $(addsuffix $(objext),$(fp128_ppc_funcs)) 46fp128_ppc_shared_obj = $(addsuffix _s$(objext),$(fp128_ppc_funcs)) 47fp128_ppc_obj = $(fp128_ppc_static_obj) $(fp128_ppc_shared_obj) 48 49# All functions 50fp128_funcs = $(fp128_softfp_funcs) $(fp128_ppc_funcs) \ 51 $(fp128_hw_funcs) $(fp128_ifunc_funcs) \ 52 $(fp128_3_1_hw_funcs) 53 54fp128_src = $(fp128_softfp_src) $(fp128_ppc_src) \ 55 $(fp128_hw_src) $(fp128_ifunc_src) \ 56 $(fp128_3_1_hw_src) 57 58fp128_obj = $(fp128_softfp_obj) $(fp128_ppc_obj) \ 59 $(fp128_hw_obj) $(fp128_ifunc_obj) \ 60 $(fp128_3_1_hw_obj) 61 62fp128_sed = $(srcdir)/config/rs6000/float128-sed$(fp128_sed_hw) 63fp128_dep = $(fp128_sed) $(srcdir)/config/rs6000/t-float128 64 65fp128_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 $(srcdir)/soft-fp/soft-fp.h 75 76# Build the emulator without ISA 3.0 hardware support. 77FP128_CFLAGS_SW = -Wno-type-limits -mvsx -mfloat128 \ 78 -mno-float128-hardware -mno-gnu-attribute \ 79 -I$(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. 91fp128_dec_objs = $(addsuffix $(objext),$(fp128_dec_funcs)) \ 92 $(addsuffix _s$(objext),$(fp128_dec_funcs)) 93 94ibm128_dec_objs = $(addsuffix $(objext),$(ibm128_dec_funcs)) \ 95 $(addsuffix _s$(objext),$(ibm128_dec_funcs)) 96 97FP128_CFLAGS_DECIMAL = -mno-gnu-attribute -Wno-psabi -mabi=ieeelongdouble 98IBM128_CFLAGS_DECIMAL = -mno-gnu-attribute -Wno-psabi -mabi=ibmlongdouble 99 100$(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 112test: 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 119clean-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 126LIB2ADD_ST += $(fp128_src) 127