diff --git a/contrib/toolchain/gcc/5x/libgcc/Makefile b/contrib/toolchain/gcc/5x/libgcc/Makefile
index d1c75a376..e49d76f03 100644
--- a/contrib/toolchain/gcc/5x/libgcc/Makefile
+++ b/contrib/toolchain/gcc/5x/libgcc/Makefile
@@ -6,6 +6,24 @@ export STRIP = kos32-strip
 
 export SDK_DIR:= $(abspath ../../../../sdk)
 
+double_type_size = 64
+long_double_type_size = 96
+decimal_float = yes
+enable_decimal_float = bid
+fixed_point = no
+
+FPBIT = true
+
+DPBIT = true
+D32PBIT = 1
+D64PBIT = 1
+D128PBIT = 1
+
+# List of functions not to build from libgcc2.c.
+
+LIB2FUNCS_EXCLUDE =
+
+
 CFLAGS_OPT+= -fomit-frame-pointer -fno-ident -mno-ms-bitfields
 CFLAGS_OPT+= -fbuilding-libgcc -fno-stack-protector
 
@@ -14,10 +32,28 @@ CFLAGS+= -U_Win32 -U_WIN32 -U__MINGW32__ -UWIN32 -U_MSC_VER
 CFLAGS+= -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wstrict-prototypes
 CFLAGS+= -Wmissing-prototypes -Wold-style-definition $(CFLAGS_OPT)
 
-INCLUDES = -I../gcc -I../include
+INCLUDES = -I. -I../gcc -I../include
+
+gcc_compile = $(CC) $(INCLUDES) $(CFLAGS)
 
 objext = .o
 
+FPBIT_FUNCS = _pack_sf _unpack_sf _addsub_sf _mul_sf _div_sf \
+	_fpcmp_parts_sf _compare_sf _eq_sf _ne_sf _gt_sf _ge_sf \
+	_lt_sf _le_sf _unord_sf _si_to_sf _sf_to_si _negate_sf _make_sf \
+	_sf_to_df _sf_to_tf _thenan_sf _sf_to_usi _usi_to_sf
+
+DPBIT_FUNCS = _pack_df _unpack_df _addsub_df _mul_df _div_df \
+	_fpcmp_parts_df _compare_df _eq_df _ne_df _gt_df _ge_df \
+	_lt_df _le_df _unord_df _si_to_df _df_to_si _negate_df _make_df \
+	_df_to_sf _df_to_tf _thenan_df _df_to_usi _usi_to_df
+
+TPBIT_FUNCS = _pack_tf _unpack_tf _addsub_tf _mul_tf _div_tf \
+	_fpcmp_parts_tf _compare_tf _eq_tf _ne_tf _gt_tf _ge_tf \
+	_lt_tf _le_tf _unord_tf _si_to_tf _tf_to_si _negate_tf _make_tf \
+	_tf_to_df _tf_to_sf _thenan_tf _tf_to_usi _usi_to_tf
+
+
 lib2funcs =	_muldi3 _negdi2 _lshrdi3 _ashldi3 _ashrdi3 _cmpdi2 _ucmpdi2	\
 		_clear_cache _trampoline __main _absvsi2 _absvdi2 _addvsi3	\
 		_addvdi3 _subvsi3 _subvdi3 _mulvsi3 _mulvdi3 _negvsi2 _negvdi2	\
@@ -25,11 +61,9 @@ lib2funcs =	_muldi3 _negdi2 _lshrdi3 _ashldi3 _ashrdi3 _cmpdi2 _ucmpdi2	\
 		_popcount_tab _popcountsi2 _popcountdi2 _paritysi2 _paritydi2	\
 		_powisf2 _powidf2 _powixf2 _powitf2 _mulsc3 _muldc3 _mulxc3	\
 		_multc3 _divsc3 _divdc3 _divxc3 _divtc3 _bswapsi2 _bswapdi2	\
-		_clrsbsi2 _clrsbdi2
-
-
-swfloatfuncs = $(patsubst %,_fixuns%XX,sf df xf)
+		_clrsbsi2 _clrsbdi2
 
+swfloatfuncs = $(patsubst %,_fixuns%XX,sf df xf)
 
 dwfloatfuncs = $(patsubst %,_fix%XX,sf df xf tf) \
 		$(patsubst %,_fixuns%XX,sf df xf tf) \
@@ -39,19 +73,128 @@ dwfloatfuncs = $(patsubst %,_fix%XX,sf df xf tf) \
 lib2funcs += $(subst XX,si,$(swfloatfuncs)) 
 lib2funcs += $(subst XX,di,$(dwfloatfuncs))
 
+lib2funcs-o = $(patsubst %,%$(objext),$(lib2funcs) $(LIB2FUNCS_ST))
+
+$(lib2funcs-o): %$(objext): libgcc2.c
+	$(gcc_compile) -DL$* -c $< -o $@
+
+libgcc-objects =
+
+ifeq ($(TPBIT),)
+# _sf_to_tf and _df_to_tf require tp-bit.c being compiled in.
+FPBIT_FUNCS := $(filter-out _sf_to_tf,$(FPBIT_FUNCS))
+DPBIT_FUNCS := $(filter-out _df_to_tf,$(DPBIT_FUNCS))
+endif
+
+FPBIT_FUNCS := $(filter-out $(LIB2FUNCS_EXCLUDE),$(FPBIT_FUNCS))
+DPBIT_FUNCS := $(filter-out $(LIB2FUNCS_EXCLUDE),$(DPBIT_FUNCS))
+TPBIT_FUNCS := $(filter-out $(LIB2FUNCS_EXCLUDE),$(TPBIT_FUNCS))
+
+fpbit-src := fp-bit.c
+
+# Build FPBIT.
+ifneq ($(FPBIT),)
+fpbit-o = $(patsubst %,%$(objext),$(FPBIT_FUNCS))
+$(fpbit-o): %$(objext): $(fpbit-src)
+	$(gcc_compile) -DFINE_GRAINED_LIBRARIES -DL$* -DFLOAT $(FPBIT_CFLAGS) -c $< -o $@
+libgcc-objects += $(fpbit-o)
+endif
+
+# Build DPBIT.
+ifneq ($(DPBIT),)
+dpbit-o = $(patsubst %,%$(objext),$(DPBIT_FUNCS))
+$(dpbit-o): %$(objext): $(fpbit-src)
+	$(gcc_compile) -DFINE_GRAINED_LIBRARIES -DL$* $(DPBIT_CFLAGS) -c $< -o $@
+libgcc-objects += $(dpbit-o)
+endif
+
+# Build TPBIT.
+ifneq ($(TPBIT),)
+tpbit-o = $(patsubst %,%$(objext),$(TPBIT_FUNCS))
+$(tpbit-o): %$(objext): $(fpbit-src)
+	$(gcc_compile) -DFINE_GRAINED_LIBRARIES -DL$* -DTFLOAT $(TPBIT_CFLAGS) -c $< -o $@
+libgcc-objects += $(tpbit-o)
+endif
+
+# Next build individual support functions.
+D32PBIT_FUNCS = _addsub_sd _div_sd _mul_sd _plus_sd _minus_sd \
+	_eq_sd _ne_sd _lt_sd _gt_sd _le_sd _ge_sd \
+	_sd_to_si _sd_to_di _sd_to_usi _sd_to_udi \
+	_si_to_sd _di_to_sd _usi_to_sd _udi_to_sd \
+	_sd_to_sf _sd_to_df _sd_to_xf _sd_to_tf \
+	_sf_to_sd _df_to_sd _xf_to_sd _tf_to_sd \
+	_sd_to_dd _sd_to_td _unord_sd _conv_sd
+
+D64PBIT_FUNCS = _addsub_dd _div_dd _mul_dd _plus_dd _minus_dd \
+	_eq_dd _ne_dd _lt_dd _gt_dd _le_dd _ge_dd \
+	_dd_to_si _dd_to_di _dd_to_usi _dd_to_udi \
+	_si_to_dd _di_to_dd _usi_to_dd _udi_to_dd \
+	_dd_to_sf _dd_to_df _dd_to_xf _dd_to_tf \
+	_sf_to_dd _df_to_dd _xf_to_dd _tf_to_dd \
+	_dd_to_sd _dd_to_td _unord_dd _conv_dd
+
+D128PBIT_FUNCS = _addsub_td _div_td _mul_td _plus_td _minus_td \
+	_eq_td _ne_td _lt_td _gt_td _le_td _ge_td \
+	_td_to_si _td_to_di _td_to_usi _td_to_udi \
+	_si_to_td _di_to_td _usi_to_td _udi_to_td \
+	_td_to_sf _td_to_df _td_to_xf _td_to_tf \
+	_sf_to_td _df_to_td _xf_to_td _tf_to_td \
+	_td_to_sd _td_to_dd _unord_td _conv_td
+
+ifeq ($(enable_decimal_float),bid)
+ifneq ($(D32PBIT),)
+D32PBIT_FUNCS:=$(filter-out _plus_sd _minus_sd _conv_sd, $(D32PBIT_FUNCS))
+endif
+
+ifneq ($(D64PBIT),)
+D64PBIT_FUNCS:=$(filter-out _plus_dd _minus_dd _conv_dd, $(D64PBIT_FUNCS))
+endif
+
+ifneq ($(D128PBIT),)
+D128PBIT_FUNCS:=$(filter-out _plus_td _minus_td _conv_td, $(D128PBIT_FUNCS))
+endif
+endif
+
+ifneq ($(D32PBIT),)
+d32pbit-o = $(patsubst %,%$(objext),$(D32PBIT_FUNCS))
+ifeq ($(enable_decimal_float),bid)
+$(d32pbit-o): %$(objext): config/libbid/%.c
+else
+$(d32pbit-o): %$(objext): $(srcdir)/dfp-bit.c
+endif
+	$(gcc_compile) -DFINE_GRAINED_LIBRARIES -DL$* -DWIDTH=32 -c $< -o $@
+libgcc-objects += $(d32pbit-o)
+endif
+
+ifneq ($(D64PBIT),)
+d64pbit-o = $(patsubst %,%$(objext),$(D64PBIT_FUNCS))
+ifeq ($(enable_decimal_float),bid)
+$(d64pbit-o): %$(objext): config/libbid/%.c
+else
+$(d64pbit-o): %$(objext): $(srcdir)/dfp-bit.c
+endif
+	$(gcc_compile) -DFINE_GRAINED_LIBRARIES -DL$* -DWIDTH=64 -c $<
+libgcc-objects += $(d64pbit-o)
+endif
+
+ifneq ($(D128PBIT),)
+d128pbit-o = $(patsubst %,%$(objext),$(D128PBIT_FUNCS))
+ifeq ($(enable_decimal_float),bid)
+$(d128pbit-o): %$(objext): config/libbid/%.c
+else
+$(d128pbit-o): %$(objext): $(srcdir)/dfp-bit.c
+endif
+	$(gcc_compile) -DFINE_GRAINED_LIBRARIES -DL$* -DWIDTH=128 -c $<
+libgcc-objects += $(d128pbit-o)
+endif
+
 # targets 
 
 all: libgcc.a
 
-lib2funcs-o = $(patsubst %,%$(objext),$(lib2funcs) $(LIB2FUNCS_ST))
-
-
-$(lib2funcs-o): %$(objext): libgcc2.c
-	$(CC) $(INCLUDES) $(CFLAGS) -DL$* -c $< -o $@
-
-libgcc.a : $(lib2funcs-o) MAkefile
-	$(AR) crs libgcc.a $(lib2funcs-o)
+libgcc.a : $(lib2funcs-o) $(libgcc-objects) Makefile
+	$(AR) crs libgcc.a $(lib2funcs-o) $(libgcc-objects)
 #	mv -f libbfd.a $(SDK_DIR)/lib
 
-
+
  
\ No newline at end of file
diff --git a/contrib/toolchain/gcc/5x/libgcc/empty.mk b/contrib/toolchain/gcc/5x/libgcc/empty.mk
new file mode 100644
index 000000000..7b1d97b8b
--- /dev/null
+++ b/contrib/toolchain/gcc/5x/libgcc/empty.mk
@@ -0,0 +1,2 @@
+# Empty.  This file exists to suppress errors in the parent Makefile
+# when a variable (e.g. LIB2ADD) is empty.
diff --git a/contrib/toolchain/gcc/5x/libgcc/siditi-object.mk b/contrib/toolchain/gcc/5x/libgcc/siditi-object.mk
new file mode 100644
index 000000000..c9d814477
--- /dev/null
+++ b/contrib/toolchain/gcc/5x/libgcc/siditi-object.mk
@@ -0,0 +1,15 @@
+# This file is included several times in a row, once for each element of
+# $(iter-items).  On each inclusion, we advance $o to the next element.
+# $(iter-labels) and $(iter-sizes) are also advanced.
+
+o := $(firstword $(iter-items))
+iter-items := $(filter-out $o,$(iter-items))
+
+$o-label := $(firstword $(iter-labels))
+iter-labels := $(wordlist 2,$(words $(iter-labels)),$(iter-labels))
+
+$o-size := $(firstword $(iter-sizes))
+iter-sizes := $(wordlist 2,$(words $(iter-sizes)),$(iter-sizes))
+
+$o$(objext): %$(objext): libgcc2.c
+	$(CC) $(INCLUDES) $(CFLAGS) -DLIBGCC2_UNITS_PER_WORD=$($*-size) -DL$($*-label) -c $< -o $@