1 # Copyright (C) 2006-2024 Free Software Foundation, Inc. 2 3 # This file is part of GCC. 4 5 # GCC is free software; you can redistribute it and/or modify 6 # it under the terms of the GNU General Public License as published by 7 # the Free Software Foundation; either version 3, or (at your option) 8 # any later version. 9 10 # GCC is distributed in the hope that it will be useful, 11 # but WITHOUT ANY WARRANTY; without even the implied warranty of 12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 # GNU General Public License for more details. 14 15 # You should have received a copy of the GNU General Public License 16 # along with GCC; see the file COPYING3. If not see 17 # <http://www.gnu.org/licenses/>. 18 19 # Targets using soft-fp should define the following variables: 20 # 21 # softfp_float_modes: a list of soft-float floating-point modes, 22 # e.g. sf df 23 # softfp_int_modes: a list of integer modes for which to define conversions, 24 # e.g. si di 25 # softfp_extensions: a list of extensions between floating-point modes, 26 # e.g. sfdf 27 # softfp_truncations: a list of truncations between floating-point modes, 28 # e.g. dfsf 29 # 30 # Extensions and truncations should include those where only one mode 31 # is a soft-float mode; for example, sftf where sf is hard-float and 32 # tf is soft-float. 33 # 34 # If some additional functions should be built that are not implied by 35 # the above settings, also define softfp_extras as a list of those 36 # functions, e.g. unorddf2. 37 # 38 # If the functions should only be built as compat symbols for shared 39 # libgcc, not available for new links, also define: 40 # 41 # softfp_compat := y 42 # 43 # If the libgcc2.c functions should not be replaced, also define: 44 # 45 # softfp_exclude_libgcc2 := y 46 # 47 # Avoiding replacing the libgcc2.c functions is a temporary measure 48 # for targets with both hard-float and soft-float multilibs, since 49 # these variables apply for all multilibs. With toplevel libgcc, 50 # soft-fp can be used conditionally on the multilib instead. 51 # 52 # If the code should not be compiled at all for some multilibs, define: 53 # 54 # softfp_wrap_start: text to put at the start of wrapper source files, 55 # output with echo 56 # e.g. '#ifndef __powerpc64__' 57 # softfp_wrap_end: text to put at the end of wrapper source files, 58 # e.g. '#endif' 59 # 60 # This is another temporary measure, and cannot be used together with 61 # softfp_compat. 62 63 softfp_float_funcs = add$(m)3 div$(m)3 eq$(m)2 ge$(m)2 le$(m)2 mul$(m)3 \ 64 neg$(m)2 sub$(m)3 unord$(m)2 65 softfp_floatint_funcs = fix$(m)$(i) fixuns$(m)$(i) \ 66 float$(i)$(m) floatun$(i)$(m) 67 softfp_floatbitint_funcs = fix$(m)bitint floatbitint$(m) 68 softfp_bid_list := 69 ifeq ($(decimal_float),yes) 70 ifeq ($(enable_decimal_float),bid) 71 softfp_bid_list += bitintpow10 \ 72 $(foreach m,sd dd td,fix$(m)bitint floatbitint$(m) \ 73 fix$(m)ti fixuns$(m)ti \ 74 floatti$(m) floatunti$(m)) 75 endif 76 endif 77 78 softfp_func_list := \ 79 $(foreach m,$(softfp_float_modes), \ 80 $(softfp_float_funcs) \ 81 $(foreach i,$(softfp_int_modes), \ 82 $(softfp_floatint_funcs))) \ 83 $(foreach m,sf df,$(softfp_floatbitint_funcs)) \ 84 $(foreach e,$(softfp_extensions),extend$(e)2) \ 85 $(foreach t,$(softfp_truncations),trunc$(t)2) \ 86 $(softfp_extras) 87 88 ifeq ($(softfp_exclude_libgcc2),y) 89 # This list is taken from mklibgcc.in and doesn't presently allow for 90 # 64-bit targets where si should become di and di should become ti. 91 softfp_func_list := $(filter-out floatdidf floatdisf fixunsdfsi fixunssfsi \ 92 fixunsdfdi fixdfdi fixunssfdi fixsfdi fixxfdi fixunsxfdi \ 93 floatdixf fixunsxfsi fixtfdi fixunstfdi floatditf \ 94 floatundidf floatundisf floatundixf floatunditf,$(softfp_func_list)) 95 endif 96 97 ifeq ($(softfp_compat),y) 98 softfp_file_list := $(addsuffix .c,$(softfp_func_list)) 99 100 ifeq ($(enable_shared),yes) 101 softfp_map_dep := libgcc.map.in 102 else 103 softfp_map_dep := 104 endif 105 softfp_set_symver = echo "asm (\".symver $(1),$(1)@`$(AWK) -f $(srcdir)/find-symver.awk -v symbol=$(1) libgcc.map.in`\");" >> $@ 106 $(softfp_file_list): $(softfp_map_dep) 107 echo '#ifdef SHARED' > $@ 108 echo '#include "soft-fp/$@"' >> $@ 109 ifeq ($(enable_shared),yes) 110 $(call softfp_set_symver,__$(*F)) 111 if grep strong_alias $(srcdir)/soft-fp/$@ > /dev/null; then \ 112 alias=`grep strong_alias $(srcdir)/soft-fp/$@ | sed -e 's/.*, *//' -e 's/).*//'`; \ 113 $(call softfp_set_symver,$$alias); \ 114 fi 115 endif 116 echo '#endif' >> $@ 117 else 118 ifneq ($(softfp_wrap_start),) 119 softfp_file_list := $(addsuffix .c,$(softfp_func_list)) 120 121 $(softfp_file_list): 122 echo $(softfp_wrap_start) > $@ 123 echo '#include "soft-fp/$@"' >> $@ 124 echo $(softfp_wrap_end) >> $@ 125 else 126 softfp_file_list := \ 127 $(addsuffix .c,$(addprefix $(srcdir)/soft-fp/,$(softfp_func_list))) 128 endif 129 endif 130 softfp_bid_file_list := \ 131 $(addsuffix .c,$(addprefix $(srcdir)/soft-fp/,$(softfp_bid_list))) 132 133 # Disable missing prototype and type limit warnings. The prototypes 134 # for the functions in the soft-fp files have not been brought across 135 # from glibc. 136 137 soft-fp-objects-base = $(basename $(notdir $(softfp_file_list))) 138 139 soft-fp-objects = $(addsuffix $(objext), $(soft-fp-objects-base)) \ 140 $(addsuffix _s$(objext), $(soft-fp-objects-base)) 141 142 $(soft-fp-objects) : INTERNAL_CFLAGS += -Wno-missing-prototypes -Wno-type-limits 143 144 LIB2ADD += $(softfp_file_list) 145 LIB2ADD_ST += $(softfp_bid_file_list) 146 147 ifneq ($(softfp_exclude_libgcc2),y) 148 # Functions in libgcc2.c are excluded for each soft-float mode (a 149 # target may have both soft-float and hard-float modes), for the fixed 150 # list of integer modes (si and di) for which libgcc2.c defines any 151 # such functions. Depending on the target, the si and di symbols may 152 # in fact define di and ti functions. 153 154 LIB2FUNCS_EXCLUDE += \ 155 $(addprefix _,$(foreach m,$(softfp_float_modes), \ 156 $(foreach i,si di, \ 157 $(softfp_floatint_funcs)))) 158 endif 159
Indexes created Fri Jun 05 00:26:10 UTC 2026