1 # Copyright (C) 2006-2022 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 68 softfp_func_list := \ 69 $(foreach m,$(softfp_float_modes), \ 70 $(softfp_float_funcs) \ 71 $(foreach i,$(softfp_int_modes), \ 72 $(softfp_floatint_funcs))) \ 73 $(foreach e,$(softfp_extensions),extend$(e)2) \ 74 $(foreach t,$(softfp_truncations),trunc$(t)2) \ 75 $(softfp_extras) 76 77 ifeq ($(softfp_exclude_libgcc2),y) 78 # This list is taken from mklibgcc.in and doesn't presently allow for 79 # 64-bit targets where si should become di and di should become ti. 80 softfp_func_list := $(filter-out floatdidf floatdisf fixunsdfsi fixunssfsi \ 81 fixunsdfdi fixdfdi fixunssfdi fixsfdi fixxfdi fixunsxfdi \ 82 floatdixf fixunsxfsi fixtfdi fixunstfdi floatditf \ 83 floatundidf floatundisf floatundixf floatunditf,$(softfp_func_list)) 84 endif 85 86 ifeq ($(softfp_compat),y) 87 softfp_file_list := $(addsuffix .c,$(softfp_func_list)) 88 89 ifeq ($(enable_shared),yes) 90 softfp_map_dep := libgcc.map.in 91 else 92 softfp_map_dep := 93 endif 94 softfp_set_symver = echo "asm (\".symver $(1),$(1)@`$(AWK) -f $(srcdir)/find-symver.awk -v symbol=$(1) libgcc.map.in`\");" >> $@ 95 $(softfp_file_list): $(softfp_map_dep) 96 echo '#ifdef SHARED' > $@ 97 echo '#include "soft-fp/$@"' >> $@ 98 ifeq ($(enable_shared),yes) 99 $(call softfp_set_symver,__$(*F)) 100 if grep strong_alias $(srcdir)/soft-fp/$@ > /dev/null; then \ 101 alias=`grep strong_alias $(srcdir)/soft-fp/$@ | sed -e 's/.*, *//' -e 's/).*//'`; \ 102 $(call softfp_set_symver,$$alias); \ 103 fi 104 endif 105 echo '#endif' >> $@ 106 else 107 ifneq ($(softfp_wrap_start),) 108 softfp_file_list := $(addsuffix .c,$(softfp_func_list)) 109 110 $(softfp_file_list): 111 echo $(softfp_wrap_start) > $@ 112 echo '#include "soft-fp/$@"' >> $@ 113 echo $(softfp_wrap_end) >> $@ 114 else 115 softfp_file_list := \ 116 $(addsuffix .c,$(addprefix $(srcdir)/soft-fp/,$(softfp_func_list))) 117 endif 118 endif 119 120 # Disable missing prototype and type limit warnings. The prototypes 121 # for the functions in the soft-fp files have not been brought across 122 # from glibc. 123 124 soft-fp-objects-base = $(basename $(notdir $(softfp_file_list))) 125 126 soft-fp-objects = $(addsuffix $(objext), $(soft-fp-objects-base)) \ 127 $(addsuffix _s$(objext), $(soft-fp-objects-base)) 128 129 $(soft-fp-objects) : INTERNAL_CFLAGS += -Wno-missing-prototypes -Wno-type-limits 130 131 LIB2ADD += $(softfp_file_list) 132 133 ifneq ($(softfp_exclude_libgcc2),y) 134 # Functions in libgcc2.c are excluded for each soft-float mode (a 135 # target may have both soft-float and hard-float modes), for the fixed 136 # list of integer modes (si and di) for which libgcc2.c defines any 137 # such functions. Depending on the target, the si and di symbols may 138 # in fact define di and ti functions. 139 140 LIB2FUNCS_EXCLUDE += \ 141 $(addprefix _,$(foreach m,$(softfp_float_modes), \ 142 $(foreach i,si di, \ 143 $(softfp_floatint_funcs)))) 144 endif 145
Indexes created Sun Oct 25 00:26:45 UTC 2026