gcc/libgcc/config/aarch64/t-lse

# Out-of-line LSE atomics for AArch64 architecture.
# Copyright (C) 2019-2022 Free Software Foundation, Inc.
# Contributed by Linaro Ltd.
#
# This file is part of GCC.
#
# GCC is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3, or (at your option)
# any later version.
#
# GCC is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with GCC; see the file COPYING3.  If not see
# <http://www.gnu.org/licenses/>.

# Compare-and-swap has 5 sizes and 4 memory models.
S0 := $(foreach s, 1 2 4 8 16, $(addsuffix _$(s), cas))
O0 := $(foreach m, 1 2 3 4, $(addsuffix _$(m)$(objext), $(S0)))

# Swap, Load-and-operate have 4 sizes and 4 memory models
S1 := $(foreach s, 1 2 4 8, $(addsuffix _$(s), swp ldadd ldclr ldeor ldset))
O1 := $(foreach m, 1 2 3 4, $(addsuffix _$(m)$(objext), $(S1)))

LSE_OBJS := $(O0) $(O1)

libgcc-objects += $(LSE_OBJS) lse-init$(objext)

empty      =
space      = $(empty) $(empty)
PAT_SPLIT  = $(subst _,$(space),$(*F))
PAT_BASE   = $(word 1,$(PAT_SPLIT))
PAT_N      = $(word 2,$(PAT_SPLIT))
PAT_M      = $(word 3,$(PAT_SPLIT))

lse-init$(objext): $(srcdir)/config/aarch64/lse-init.c
	$(gcc_compile) -c $<

$(LSE_OBJS): $(srcdir)/config/aarch64/lse.S
	$(gcc_compile) -DL_$(PAT_BASE) -DSIZE=$(PAT_N) -DMODEL=$(PAT_M) -c $<