The R13B03 release.OTP_R13B03

1 files changed, 167 insertions, 0 deletions

diff --git a/erts/emulator/test/float_SUITE.erl b/erts/emulator/test/float_SUITE.erl
new file mode 100644
index 0000000000..102e472ea6
--- /dev/null
+++ b/erts/emulator/test/float_SUITE.erl
@@ -0,0 +1,167 @@
+%%
+%% %CopyrightBegin%
+%% 
+%% Copyright Ericsson AB 1997-2009. 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(float_SUITE).
+
+-include("test_server.hrl").
+
+-export([all/1,init_per_testcase/2,fin_per_testcase/2,
+	 fpe/1,fp_drv/1,fp_drv_thread/1,denormalized/1,match/1,bad_float_unpack/1]).
+
+init_per_testcase(Func, Config) when is_atom(Func), is_list(Config) ->
+    Dog = ?t:timetrap(?t:minutes(3)),
+    [{watchdog, Dog},{testcase,Func}|Config].
+
+fin_per_testcase(_Func, Config) ->
+    Dog = ?config(watchdog, Config),
+    ?t:timetrap_cancel(Dog).
+
+all(suite) ->
+    [fpe,fp_drv,fp_drv_thread,denormalized,match,bad_float_unpack].
+
+%% Forces floating point exceptions and tests that subsequent, legal,
+%% operations are calculated correctly.  Original version by Sebastian
+%% Strollo.
+
+fpe(Config) when is_list(Config) ->
+    ?line 0.0 = math:log(1.0),
+    ?line {'EXIT', {badarith, _}} = (catch math:log(-1.0)),
+    ?line 0.0 = math:log(1.0),
+    ?line {'EXIT', {badarith, _}} = (catch math:log(0.0)),
+    ?line 0.0 = math:log(1.0),
+    ?line {'EXIT',{badarith,_}} = (catch 3.23e133 * id(3.57e257)),
+    ?line 0.0 = math:log(1.0),
+    ?line {'EXIT',{badarith,_}} = (catch 5.0/id(0.0)),
+    ?line 0.0 = math:log(1.0),
+    ok.
+
+
+-define(ERTS_FP_CONTROL_TEST, 0).
+-define(ERTS_FP_THREAD_TEST, 1).
+
+fp_drv(Config) when is_list(Config) ->
+    fp_drv_test(?ERTS_FP_CONTROL_TEST, ?config(data_dir, Config)).
+
+fp_drv_thread(Config) when is_list(Config) ->
+    %% Run in a separate node since it used to crash the emulator...
+    ?line Parent = self(),
+    ?line DrvDir = ?config(data_dir, Config),
+    ?line {ok,Node} = start_node(Config),
+    ?line Tester = spawn_link(Node,
+			      fun () ->
+				      Parent !
+					  {self(),
+					   fp_drv_test(?ERTS_FP_THREAD_TEST,
+						       DrvDir)}
+			      end),
+    ?line Result = receive {Tester, Res} -> Res end,
+    ?line stop_node(Node),
+    ?line Result.
+
+fp_drv_test(Test, DrvDir) ->
+    ?line Drv = fp_drv,
+    ?line try
+	      begin
+		  ?line case erl_ddll:load_driver(DrvDir, Drv) of
+			    ok ->
+				ok;
+			    {error, permanent} ->
+				ok;
+			    {error, LoadError} ->
+				exit({load_error,
+				      erl_ddll:format_error(LoadError)});
+			     LoadError ->
+				exit({load_error, LoadError})
+			end,
+		  case open_port({spawn, Drv}, []) of
+		      Port when is_port(Port) ->
+			      try port_control(Port, Test, "") of
+				  "ok" ->
+				      0.0 = math:log(1.0),
+				      ok;
+				  [$s,$k,$i,$p,$:,$ | Reason] ->
+				      {skipped, Reason};
+				  Error ->
+				      exit(Error)
+			      after
+				  Port ! {self(), close},
+				receive {Port, closed} -> ok end,
+				false = lists:member(Port, erlang:ports()),
+				ok
+			      end;
+		      Error ->
+			  exit({open_port_failed, Error})
+		  end
+	      end
+	  catch
+	      throw:Term -> ?line Term
+	  after
+	      erl_ddll:unload_driver(Drv)
+	  end.
+
+denormalized(Config) when is_list(Config) ->
+    ?line Denormalized = 1.0e-307 / 1000,
+    ?line roundtrip(Denormalized),
+    ?line NegDenormalized = -1.0e-307 / 1000,
+    ?line roundtrip(NegDenormalized),
+    ok.
+
+roundtrip(N) ->
+    N = binary_to_term(term_to_binary(N)),
+    N = binary_to_term(term_to_binary(N, [{minor_version,1}])).
+
+match(Config) when is_list(Config) ->
+    ?line one = match_1(1.0),
+    ?line two = match_1(2.0),
+    ?line a_lot = match_1(1000.0),
+    ?line {'EXIT',_} = (catch match_1(0.5)),
+    ok.
+    
+match_1(1.0) -> one;
+match_1(2.0) -> two;
+match_1(1000.0) -> a_lot.
+
+%% Thanks to Per Gustafsson.
+
+bad_float_unpack(Config) when is_list(Config) ->
+    ?line Bin = <<-1:64>>,
+    ?line -1 = bad_float_unpack_match(Bin),
+    ok.
+
+bad_float_unpack_match(<<F:64/float>>) -> F;
+bad_float_unpack_match(<<I:64/integer-signed>>) -> I.
+
+id(I) -> I.
+    
+start_node(Config) when is_list(Config) ->
+    ?line Pa = filename:dirname(code:which(?MODULE)),
+    ?line {A, B, C} = now(),
+    ?line Name = list_to_atom(atom_to_list(?MODULE)
+			      ++ "-"
+			      ++ atom_to_list(?config(testcase, Config))
+			      ++ "-"
+			      ++ integer_to_list(A)
+			      ++ "-"
+			      ++ integer_to_list(B)
+			      ++ "-"
+			      ++ integer_to_list(C)),
+    ?line ?t:start_node(Name, slave, [{args, "-pa "++Pa}]).
+
+stop_node(Node) ->
+    ?t:stop_node(Node).