libgcc/config/t-softfp

   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
  53 softfp_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$(m)2
  55 softfp_floatint_funcs = fix$(m)$(i) fixuns$(m)$(i) \
  56   float$(i)$(m) floatun$(i)$(m)
  57
  58 softfp_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$(t)2)
  65
  66 ifeq ($(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.
  69 softfp_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))
  73 endif
  74
  75 ifeq ($(softfp_wrap_start),)
  76 softfp_file_list := \
  77   $(addsuffix .c,$(addprefix $(srcdir)/soft-fp/,$(softfp_func_list)))
  78 else
  79 softfp_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) >> $@
  85 endif
  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
  91 soft-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
  96 LIB2ADD += $(softfp_file_list)
  97
  98 ifneq ($(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
 105 LIB2FUNCS_EXCLUDE += \
 106   $(addprefix _,$(foreach m,$(softfp_float_modes), \
 107                             $(foreach i,si di, \
 108                                         $(softfp_floatint_funcs))))
 109 endif