From 84adefa331c4159d432d22840663c38f155cd4c1 Mon Sep 17 00:00:00 2001
From: Erlang/OTP <otp@erlang.org>
Date: Fri, 20 Nov 2009 14:54:40 +0000
Subject: The R13B03 release.

---
 lib/hipe/ppc/hipe_ppc_ra_postconditions_fp.erl | 130 +++++++++++++++++++++++++
 1 file changed, 130 insertions(+)
 create mode 100644 lib/hipe/ppc/hipe_ppc_ra_postconditions_fp.erl

(limited to 'lib/hipe/ppc/hipe_ppc_ra_postconditions_fp.erl')

diff --git a/lib/hipe/ppc/hipe_ppc_ra_postconditions_fp.erl b/lib/hipe/ppc/hipe_ppc_ra_postconditions_fp.erl
new file mode 100644
index 0000000000..889c5681ac
--- /dev/null
+++ b/lib/hipe/ppc/hipe_ppc_ra_postconditions_fp.erl
@@ -0,0 +1,130 @@
+%% -*- 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_ppc_ra_postconditions_fp).
+-export([check_and_rewrite/2]).
+-include("hipe_ppc.hrl").
+
+check_and_rewrite(Defun, Coloring) ->
+  TempMap = hipe_temp_map:cols2tuple(Coloring, hipe_ppc_specific_fp),
+  #defun{code=Code0} = Defun,
+  {Code1,DidSpill} = do_insns(Code0, TempMap, [], false),
+  VarRange = {0, hipe_gensym:get_var(ppc)},
+  {Defun#defun{code=Code1, var_range=VarRange},
+   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) ->
+  case I of
+    #lfd{} -> do_lfd(I, TempMap);
+    #lfdx{} -> do_lfdx(I, TempMap);
+    #stfd{} -> do_stfd(I, TempMap);
+    #stfdx{} -> do_stfdx(I, TempMap);
+    #fp_binary{} -> do_fp_binary(I, TempMap);
+    #fp_unary{} -> do_fp_unary(I, TempMap);
+    #pseudo_fmove{} -> do_pseudo_fmove(I, TempMap);
+    _ -> {[I], false}
+  end.
+
+%%% Fix relevant instruction types.
+
+do_lfd(I=#lfd{dst=Dst}, TempMap) ->
+  {FixDst, NewDst, DidSpill} = fix_dst(Dst, TempMap),
+  NewI = I#lfd{dst=NewDst},
+  {[NewI | FixDst], DidSpill}.
+
+do_lfdx(I=#lfdx{dst=Dst}, TempMap) ->
+  {FixDst, NewDst, DidSpill} = fix_dst(Dst, TempMap),
+  NewI = I#lfdx{dst=NewDst},
+  {[NewI | FixDst], DidSpill}.
+
+do_stfd(I=#stfd{src=Src}, TempMap) ->
+  {FixSrc, NewSrc, DidSpill} = fix_src(Src, TempMap),
+  NewI = I#stfd{src=NewSrc},
+  {FixSrc ++ [NewI], DidSpill}.
+
+do_stfdx(I=#stfdx{src=Src}, TempMap) ->
+  {FixSrc, NewSrc, DidSpill} = fix_src(Src, TempMap),
+  NewI = I#stfdx{src=NewSrc},
+  {FixSrc ++ [NewI], DidSpill}.
+
+do_fp_binary(I=#fp_binary{dst=Dst,src1=Src1,src2=Src2}, TempMap) ->
+  {FixDst,NewDst,DidSpill1} = fix_dst(Dst, TempMap),
+  {FixSrc1,NewSrc1,DidSpill2} = fix_src(Src1, TempMap),
+  {FixSrc2,NewSrc2,DidSpill3} = fix_src(Src2, TempMap),
+  NewI = I#fp_binary{dst=NewDst,src1=NewSrc1,src2=NewSrc2},
+  {FixSrc1 ++ FixSrc2 ++ [NewI | FixDst], DidSpill1 or DidSpill2 or DidSpill3}.
+
+do_fp_unary(I=#fp_unary{dst=Dst,src=Src}, TempMap) ->
+  {FixDst,NewDst,DidSpill1} = fix_dst(Dst, TempMap),
+  {FixSrc,NewSrc,DidSpill2} = fix_src(Src, TempMap),
+  NewI = I#fp_unary{dst=NewDst,src=NewSrc},
+  {FixSrc ++ [NewI | FixDst], DidSpill1 or DidSpill2}.
+
+do_pseudo_fmove(I=#pseudo_fmove{dst=Dst,src=Src}, TempMap) ->
+  case temp_is_spilled(Dst, TempMap) of
+    true ->
+      {FixSrc,NewSrc,DidSpill} = fix_src(Src, TempMap),
+      NewI = I#pseudo_fmove{src=NewSrc},
+      {FixSrc ++ [NewI], DidSpill};
+    _ ->
+      {[I], false}
+  end.
+
+%%% Fix Dst and Src operands.
+
+fix_src(Src, TempMap) ->
+  case temp_is_spilled(Src, TempMap) of
+    true ->
+      NewSrc = clone(Src),
+      {[hipe_ppc:mk_pseudo_fmove(NewSrc, Src)], NewSrc, true};
+    _ ->
+      {[], Src, false}
+  end.
+
+fix_dst(Dst, TempMap) ->
+  case temp_is_spilled(Dst, TempMap) of
+    true ->
+      NewDst = clone(Dst),
+      {[hipe_ppc:mk_pseudo_fmove(Dst, NewDst)], NewDst, true};
+    _ ->
+      {[], Dst, false}
+  end.
+
+%%% Check if an operand is a pseudo-temp.
+
+temp_is_spilled(Temp, TempMap) ->
+  case hipe_ppc:temp_is_allocatable(Temp) of
+    true ->
+      Reg = hipe_ppc:temp_reg(Temp),
+      tuple_size(TempMap) > Reg andalso hipe_temp_map:is_spilled(Reg, TempMap);
+    false -> true
+  end.
+
+%%% Create a new temp with the same type as an old one.
+
+clone(Temp) ->
+  Type = hipe_ppc:temp_type(Temp),	% XXX: always double?
+  hipe_ppc:mk_new_temp(Type).
-- 
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