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-rw-r--r--lib/hipe/amd64/hipe_amd64_sse2.erl82
1 files changed, 82 insertions, 0 deletions
diff --git a/lib/hipe/amd64/hipe_amd64_sse2.erl b/lib/hipe/amd64/hipe_amd64_sse2.erl
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+++ b/lib/hipe/amd64/hipe_amd64_sse2.erl
@@ -0,0 +1,82 @@
+%% -*- erlang-indent-level: 2 -*-
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2016. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%% http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+%% Fix {mem, mem} floating point operations that result from linear scan
+%% allocated floats.
+
+-module(hipe_amd64_sse2).
+
+-export([map/1]).
+
+-include("../x86/hipe_x86.hrl").
+-include("../main/hipe.hrl").
+
+%%----------------------------------------------------------------------
+
+map(CFG) ->
+ hipe_x86_cfg:map_bbs(fun do_bb/2, CFG).
+
+do_bb(_Lbl, BB) ->
+ Code = do_insns(hipe_bb:code(BB), []),
+ hipe_bb:code_update(BB, Code).
+
+do_insns([I|Insns], Accum) ->
+ NewIs = do_insn(I),
+ do_insns(Insns, lists:reverse(NewIs, Accum));
+do_insns([], Accum) ->
+ lists:reverse(Accum).
+
+do_insn(I) ->
+ case I of
+ #fp_binop{} -> do_fp_binop(I);
+ #fmove{} -> do_fmove(I);
+ _ -> [I]
+ end.
+
+do_fp_binop(I = #fp_binop{src=Src0,dst=Dst}) ->
+ {FixSrc, Src} = fix_binary(Src0, Dst),
+ FixSrc ++ [I#fp_binop{src=Src}].
+
+do_fmove(I = #fmove{src=Src0,dst=Dst}) ->
+ {FixSrc, Src} = fix_binary(Src0, Dst),
+ FixSrc ++ [I#fmove{src=Src}].
+
+fix_binary(Src0, Dst) ->
+ case is_mem_opnd(Src0) of
+ false -> {[], Src0};
+ true ->
+ case is_mem_opnd(Dst) of
+ false -> {[], Src0};
+ true ->
+ Src1 = spill_temp(),
+ {[hipe_x86:mk_fmove(Src0, Src1)], Src1}
+ end
+ end.
+
+is_mem_opnd(#x86_fpreg{reg=Reg}) ->
+ not hipe_amd64_registers:is_precoloured_sse2(Reg);
+is_mem_opnd(#x86_temp{type=double, reg=Reg}) ->
+ not hipe_amd64_registers:is_precoloured_sse2(Reg);
+is_mem_opnd(#x86_temp{type=_, reg=Reg}) ->
+ not hipe_amd64_registers:is_precoloured(Reg);
+is_mem_opnd(#x86_mem{}) -> true.
+
+spill_temp() ->
+ hipe_x86:mk_temp(hipe_amd64_registers:sse2_temp0(), double).