%% -*- erlang-indent-level: 2 -*-
%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2004-2009. All Rights Reserved.
%%
%% The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
%% compliance with the License. You should have received a copy of the
%% Erlang Public License along with this software. If not, it can be
%% retrieved online at http://www.erlang.org/.
%%
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%% the License for the specific language governing rights and limitations
%% under the License.
%%
%% %CopyrightEnd%
%%
-module(hipe_amd64_ra_sse2_postconditions).
-export([check_and_rewrite/2]).
-include("../x86/hipe_x86.hrl").
-define(HIPE_INSTRUMENT_COMPILER, true).
-include("../main/hipe.hrl").
-define(count_temp(T), ?cons_counter(counter_mfa_mem_temps, T)).
check_and_rewrite(AMD64Defun, Coloring) ->
%%io:format("Converting\n"),
TempMap = hipe_temp_map:cols2tuple(Coloring,hipe_amd64_specific_sse2),
%%io:format("Rewriting\n"),
#defun{code=Code0} = AMD64Defun,
{Code1, DidSpill} = do_insns(Code0, TempMap, [], false),
{AMD64Defun#defun{code=Code1, var_range={0, hipe_gensym:get_var(x86)}},
DidSpill}.
do_insns([I|Insns], TempMap, Accum, DidSpill0) ->
{NewIs, DidSpill1} = do_insn(I, TempMap),
do_insns(Insns, TempMap, lists:reverse(NewIs, Accum), DidSpill0 or DidSpill1);
do_insns([], _TempMap, Accum, DidSpill) ->
{lists:reverse(Accum), DidSpill}.
do_insn(I, TempMap) -> % Insn -> {Insn list, DidSpill}
case I of
#fmove{} ->
do_fmove(I, TempMap);
#fp_unop{} ->
do_fp_unop(I, TempMap);
#fp_binop{} ->
do_fp_binop(I, TempMap);
_ ->
%% All non sse2 ops
{[I], false}
end.
%%% Fix an fp_binop.
do_fp_binop(I, TempMap) ->
#fp_binop{src=Src,dst=Dst} = I,
case is_mem_opnd(Dst, TempMap) of
true ->
Tmp = clone(Dst),
{[#fmove{src=Dst, dst=Tmp},
I#fp_binop{src=Src,dst=Tmp},
#fmove{src=Tmp,dst=Dst}],
true};
false ->
{[I], false}
end.
do_fp_unop(I, TempMap) ->
#fp_unop{arg=Arg} = I,
case is_mem_opnd(Arg, TempMap) of
true ->
Tmp = clone(Arg),
{[#fmove{src=Arg, dst=Tmp},
I#fp_unop{arg=Tmp},
#fmove{src=Tmp,dst=Arg}],
true};
false ->
{[I], false}
end.
%%% Fix an fmove op.
do_fmove(I, TempMap) ->
#fmove{src=Src,dst=Dst} = I,
case is_mem_opnd(Dst, TempMap) and is_mem_opnd(Src, TempMap) of
true ->
Tmp = clone(Src),
{[#fmove{src=Src, dst=Tmp},I#fmove{src=Tmp,dst=Dst}],
true};
false ->
{[I], false}
end.
%%% Check if an operand denotes a memory cell (mem or pseudo).
is_mem_opnd(Opnd, TempMap) ->
R =
case Opnd of
#x86_mem{} -> true;
#x86_temp{} ->
Reg = hipe_x86:temp_reg(Opnd),
case hipe_x86:temp_is_allocatable(Opnd) of
true ->
case tuple_size(TempMap) > Reg of
true ->
case
hipe_temp_map:is_spilled(Reg, TempMap) of
true ->
?count_temp(Reg),
true;
false -> false
end;
_ -> false
end;
false -> true
end;
_ -> false
end,
%% io:format("Op ~w mem: ~w\n",[Opnd,R]),
R.
%%% Check if an operand is a spilled Temp.
%%src_is_spilled(Src, TempMap) ->
%% case hipe_x86:is_temp(Src) of
%% true ->
%% Reg = hipe_x86:temp_reg(Src),
%% case hipe_x86:temp_is_allocatable(Src) of
%% true ->
%% case tuple_size(TempMap) > Reg of
%% true ->
%% case hipe_temp_map:is_spilled(Reg, TempMap) of
%% true ->
%% ?count_temp(Reg),
%% true;
%% false ->
%% false
%% end;
%% false ->
%% false
%% end;
%% false -> true
%% end;
%% false -> false
%% end.
%% is_spilled(Temp, TempMap) ->
%% case hipe_x86:temp_is_allocatable(Temp) of
%% true ->
%% Reg = hipe_x86:temp_reg(Temp),
%% case tuple_size(TempMap) > Reg of
%% true ->
%% case hipe_temp_map:is_spilled(Reg, TempMap) of
%% true ->
%% ?count_temp(Reg),
%% true;
%% false ->
%% false
%% end;
%% false ->
%% false
%% end;
%% false -> true
%% end.
%%% Make Reg a clone of Dst (attach Dst's type to Reg).
clone(Dst) ->
Type =
case Dst of
#x86_mem{} -> hipe_x86:mem_type(Dst);
#x86_temp{} -> hipe_x86:temp_type(Dst)
end,
hipe_x86:mk_new_temp(Type).
%%% Make a certain reg into a clone of Dst
%% clone2(Dst, Reg) ->
%% Type =
%% case Dst of
%% #x86_mem{} -> hipe_x86:mem_type(Dst);
%% #x86_temp{} -> hipe_x86:temp_type(Dst)
%% end,
%% hipe_x86:mk_temp(Reg,Type).
