1# Copyright (C) 2006 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 2, 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 COPYING. If not, write to 17# the Free Software Foundation, 51 Franklin Street, Fifth Floor, 18# Boston MA 02110-1301, USA. 19 20# Targets using soft-fp should define the following variables: 21# 22# softfp_float_modes: a list of soft-float floating-point modes, 23# e.g. sf df 24# softfp_int_modes: a list of integer modes for which to define conversions, 25# e.g. si di 26# softfp_extensions: a list of extensions between floating-point modes, 27# e.g. sfdf 28# softfp_truncations: a list of truncations between floating-point modes, 29# e.g. dfsf 30# softfp_machine_header: the target sfp-machine.h file (relative to config/), 31# e.g. rs6000/sfp-machine.h 32# 33# Extensions and truncations should include those where only one mode 34# is a soft-float mode; for example, sftf where sf is hard-float and 35# tf is soft-float. 36# 37# If the libgcc2.c functions should not be replaced, also define: 38# 39# softfp_exclude_libgcc2 := y 40# 41# Avoiding replacing the libgcc2.c functions is a temporary measure 42# for targets with both hard-float and soft-float multilibs, since 43# these variables apply for all multilibs. With toplevel libgcc, 44# soft-fp can be used conditionally on the multilib instead. 45# 46# If the code should not be compiled at all for some multilibs, define: 47# 48# softfp_wrap_start: text to put at the start of wrapper source files, 49# output with echo 50# e.g. '#ifndef __powerpc64__' 51# softfp_wrap_end: text to put at the end of wrapper source files, 52# e.g. '#endif' 53# 54# This is another temporary measure. 55 56softfp_float_funcs = add$(m)3 div$(m)3 eq$(m)2 ge$(m)2 le$(m)2 mul$(m)3 \ 57 neg$(m)2 sub$(m)3 unord$(m)2 58softfp_floatint_funcs = fix$(m)$(i) fixuns$(m)$(i) \ 59 float$(i)$(m) floatun$(i)$(m) 60 61softfp_func_list := \ 62 $(foreach m,$(softfp_float_modes), \ 63 $(softfp_float_funcs) \ 64 $(foreach i,$(softfp_int_modes), \ 65 $(softfp_floatint_funcs))) \ 66 $(foreach e,$(softfp_extensions),extend$(e)2) \ 67 $(foreach t,$(softfp_truncations),trunc$(t)2) 68 69ifeq ($(softfp_exclude_libgcc2),y) 70# This list is taken from mklibgcc.in and doesn't presently allow for 71# 64-bit targets where si should become di and di should become ti. 72softfp_func_list := $(filter-out floatdidf floatdisf fixunsdfsi fixunssfsi \ 73 fixunsdfdi fixdfdi fixunssfdi fixsfdi fixxfdi fixunsxfdi \ 74 floatdixf fixunsxfsi fixtfdi fixunstfdi floatditf \ 75 floatundidf floatundisf floatundixf floatunditf,$(softfp_func_list)) 76endif 77 78ifeq ($(softfp_wrap_start),) 79softfp_file_list := \ 80 $(addsuffix .c,$(addprefix $(srcdir)/config/soft-fp/,$(softfp_func_list))) 81else 82softfp_file_list := $(addsuffix .c,$(softfp_func_list)) 83 84$(softfp_file_list): 85 echo $(softfp_wrap_start) > $@ 86 echo '#include "config/soft-fp/$@"' >> $@ 87 echo $(softfp_wrap_end) >> $@ 88endif 89 90LIB2FUNCS_EXTRA += $(softfp_file_list) 91 92ifneq ($(softfp_exclude_libgcc2),y) 93# Functions in libgcc2.c are excluded for each soft-float mode (a 94# target may have both soft-float and hard-float modes), for the fixed 95# list of integer modes (si and di) for which libgcc2.c defines any 96# such functions. Depending on the target, the si and di symbols may 97# in fact define di and ti functions. 98 99LIB2FUNCS_EXCLUDE += \ 100 $(addprefix _,$(foreach m,$(softfp_float_modes), \ 101 $(foreach i,si di, \ 102 $(softfp_floatint_funcs)))) 103endif 104 105SFP_MACHINE := sfp-machine.h 106 107$(SFP_MACHINE): $(srcdir)/config/$(softfp_machine_header) 108 cp $(srcdir)/config/$(softfp_machine_header) $(SFP_MACHINE) 109