1# Copyright (C) 2006, 2007, 2011 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 the libgcc2.c functions should not be replaced, also define: 35# 36# softfp_exclude_libgcc2 := y 37# 38# Avoiding replacing the libgcc2.c functions is a temporary measure 39# for targets with both hard-float and soft-float multilibs, since 40# these variables apply for all multilibs. With toplevel libgcc, 41# soft-fp can be used conditionally on the multilib instead. 42# 43# If the code should not be compiled at all for some multilibs, define: 44# 45# softfp_wrap_start: text to put at the start of wrapper source files, 46# output with echo 47# e.g. '#ifndef __powerpc64__' 48# softfp_wrap_end: text to put at the end of wrapper source files, 49# e.g. '#endif' 50# 51# This is another temporary measure. 52 53softfp_float_funcs = add$(m)3 div$(m)3 eq$(m)2 ge$(m)2 le$(m)2 mul$(m)3 \ 54 neg$(m)2 sub$(m)3 unord$(m)2 55softfp_floatint_funcs = fix$(m)$(i) fixuns$(m)$(i) \ 56 float$(i)$(m) floatun$(i)$(m) 57 58softfp_func_list := \ 59 $(foreach m,$(softfp_float_modes), \ 60 $(softfp_float_funcs) \ 61 $(foreach i,$(softfp_int_modes), \ 62 $(softfp_floatint_funcs))) \ 63 $(foreach e,$(softfp_extensions),extend$(e)2) \ 64 $(foreach t,$(softfp_truncations),trunc$(t)2) 65 66ifeq ($(softfp_exclude_libgcc2),y) 67# This list is taken from mklibgcc.in and doesn't presently allow for 68# 64-bit targets where si should become di and di should become ti. 69softfp_func_list := $(filter-out floatdidf floatdisf fixunsdfsi fixunssfsi \ 70 fixunsdfdi fixdfdi fixunssfdi fixsfdi fixxfdi fixunsxfdi \ 71 floatdixf fixunsxfsi fixtfdi fixunstfdi floatditf \ 72 floatundidf floatundisf floatundixf floatunditf,$(softfp_func_list)) 73endif 74 75ifeq ($(softfp_wrap_start),) 76softfp_file_list := \ 77 $(addsuffix .c,$(addprefix $(srcdir)/soft-fp/,$(softfp_func_list))) 78else 79softfp_file_list := $(addsuffix .c,$(softfp_func_list)) 80 81$(softfp_file_list): 82 echo $(softfp_wrap_start) > $@ 83 echo '#include "soft-fp/$@"' >> $@ 84 echo $(softfp_wrap_end) >> $@ 85endif 86 87# Disable missing prototype and type limit warnings. The prototypes 88# for the functions in the soft-fp files have not been brought across 89# from glibc. 90 91soft-fp-objects = $(addsuffix $(objext), $(softfp_file_list)) \ 92 $(addsuffix _s$(objext), $(softfp_file_list)) 93 94$(soft-fp-objects) : INTERNAL_CFLAGS += -Wno-missing-prototypes -Wno-type-limits 95 96LIB2ADD += $(softfp_file_list) 97 98ifneq ($(softfp_exclude_libgcc2),y) 99# Functions in libgcc2.c are excluded for each soft-float mode (a 100# target may have both soft-float and hard-float modes), for the fixed 101# list of integer modes (si and di) for which libgcc2.c defines any 102# such functions. Depending on the target, the si and di symbols may 103# in fact define di and ti functions. 104 105LIB2FUNCS_EXCLUDE += \ 106 $(addprefix _,$(foreach m,$(softfp_float_modes), \ 107 $(foreach i,si di, \ 108 $(softfp_floatint_funcs)))) 109endif 110