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%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2002-2010. 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).
-export([all/0,groups/0,init_per_group/2,end_per_group/2,pending/1,bif_calls/1,math_functions/1,mixed_float_and_int/1]).
-include_lib("test_server/include/test_server.hrl").
all() ->
test_lib:recompile(float_SUITE),
[pending, bif_calls, math_functions,
mixed_float_and_int].
groups() ->
[].
init_per_group(_GroupName, Config) ->
Config.
end_per_group(_GroupName, Config) ->
Config.
%% Thanks to Tobias Lindahl <tobias.lindahl@it.uu.se>
%% Shows the effect of pending exceptions on the x86.
pending(Config) when is_list(Config) ->
?line case catch float_mul(1, 1.1e300, 3.14e300) of
{'EXIT',{badarith,_}} -> ok;
Other -> ?t:fail({expected_exception,Other})
end,
?line 0.0 = float_sub(2.0).
float_sub(A)->
catch A - 2.0.
float_mul(0, _, _)->
ok;
float_mul(Iter, A, B) when is_float(A), is_float(B) ->
_ = A*B,
float_mul(Iter-1, A, B).
%% Thanks to Mikael Pettersson and Tobias Lindahl (HiPE).
bif_calls(Config) when is_list(Config) ->
?line {'EXIT',{badarith,_}} = (catch bad_arith(2.0, 1.7)),
?line {'EXIT',{badarith,_}} = (catch bad_arith_again(2.0, [])),
?line {'EXIT',{badarith,_}} = (catch bad_arith_xor(2.0, [])),
?line {'EXIT',{badarith,_}} = (catch bad_arith_hd(2.0, [])),
?line {'EXIT',{badarith,_}} = (catch bad_negate(2.0, 1.7)),
ok.
bad_arith(X, Y) when is_float(X) ->
X1 = X * 1.7e+308,
X2 = X1 + 1.0,
Y1 = Y * 2, %Calls erts_mixed_times/2.
%(A BIF call.)
{X2, Y1}.
bad_arith_xor(X, Y) when is_float(X) ->
X1 = X * 1.7e+308,
Y1 = Y xor true, %A failing BIF call.
{X1 + 1.0, Y1}.
bad_arith_hd(X, Y) when is_float(X) ->
X1 = X * 1.7e+308,
Y1 = hd(Y), %A failing BIF call.
{X1 + 1.0, Y1}.
bad_arith_again(X, Y) when is_float(X) ->
X1 = X * 1.7e+308,
Y1 = element(1, Y), %A failing BIF call.
{X1 + 1.0, Y1}.
bad_negate(X, Y) when is_float(X) ->
X1 = X * 1.7e+308,
X2 = X1 + 1.0,
Y1 = -Y, %BIF call.
{X2, Y1}.
%% Some math functions are not implemented on all platforms.
-define(OPTIONAL(Expected, Expr),
try
Expected = Expr
catch
error:undef -> ok
end).
math_functions(Config) when is_list(Config) ->
%% Mostly silly coverage.
?line 0.0 = math:tan(0),
?line 0.0 = math:atan2(0, 1),
?line 0.0 = math:sinh(0),
?line 1.0 = math:cosh(0),
?line 0.0 = math:tanh(0),
?line 1.0 = math:log10(10),
?line -1.0 = math:cos(math:pi()),
?line 1.0 = math:exp(0),
?line 1.0 = math:pow(math:pi(), 0),
?line 0.0 = math:log(1),
?line 0.0 = math:asin(0),
?line 0.0 = math:acos(1),
?line ?OPTIONAL(0.0, math:asinh(0)),
?line ?OPTIONAL(0.0, math:acosh(1)),
?line ?OPTIONAL(0.0, math:atanh(0)),
?line ?OPTIONAL(0.0, math:erf(0)),
?line ?OPTIONAL(1.0, math:erfc(0)),
?line 0.0 = math:tan(id(0)),
?line 0.0 = math:atan2(id(0), 1),
?line 0.0 = math:sinh(id(0)),
?line 1.0 = math:cosh(id(0)),
?line 0.0 = math:tanh(id(0)),
?line 1.0 = math:log10(id(10)),
?line 1.0 = math:exp(id(0)),
?line 0.0 = math:log(id(1)),
?line 0.0 = math:asin(id(0)),
?line 0.0 = math:acos(id(1)),
?line ?OPTIONAL(0.0, math:asinh(id(0))),
?line ?OPTIONAL(0.0, math:acosh(id(1))),
?line ?OPTIONAL(0.0, math:atanh(id(0))),
?line ?OPTIONAL(0.0, math:erf(id(0))),
?line ?OPTIONAL(1.0, math:erfc(id(0))),
%% Only for coverage (of beam_type.erl).
?line {'EXIT',{undef,_}} = (catch math:fnurfla(0)),
?line {'EXIT',{undef,_}} = (catch math:fnurfla(0, 0)),
?line {'EXIT',{badarg,_}} = (catch float(kalle)),
?line {'EXIT',{badarith,_}} = (catch name/1),
ok.
mixed_float_and_int(Config) when is_list(Config) ->
?line 129.0 = pc(77, 23, 5),
ok.
pc(Cov, NotCov, X) ->
round(Cov/(Cov+NotCov)*100) + 42 + 2.0*X.
id(I) -> I.
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