diff options
Diffstat (limited to 'erts/emulator/test/float_SUITE.erl')
| -rw-r--r-- | erts/emulator/test/float_SUITE.erl | 101 |
1 files changed, 98 insertions, 3 deletions
diff --git a/erts/emulator/test/float_SUITE.erl b/erts/emulator/test/float_SUITE.erl index 736510339f..46466427c5 100644 --- a/erts/emulator/test/float_SUITE.erl +++ b/erts/emulator/test/float_SUITE.erl @@ -25,7 +25,7 @@ init_per_group/2,end_per_group/2, init_per_testcase/2,end_per_testcase/2, fpe/1,fp_drv/1,fp_drv_thread/1,denormalized/1,match/1, - bad_float_unpack/1]). + bad_float_unpack/1,cmp_zero/1, cmp_integer/1, cmp_bignum/1]). -export([otp_7178/1]). @@ -41,10 +41,10 @@ suite() -> [{ct_hooks,[ts_install_cth]}]. all() -> [fpe, fp_drv, fp_drv_thread, otp_7178, denormalized, - match, bad_float_unpack]. + match, bad_float_unpack, {group, comparison}]. groups() -> - []. + [{comparison, [parallel], [cmp_zero, cmp_integer, cmp_bignum]}]. init_per_suite(Config) -> Config. @@ -187,6 +187,101 @@ bad_float_unpack(Config) when is_list(Config) -> bad_float_unpack_match(<<F:64/float>>) -> F; bad_float_unpack_match(<<I:64/integer-signed>>) -> I. +cmp_zero(_Config) -> + cmp(0.5e-323,0). + +cmp_integer(_Config) -> + Axis = (1 bsl 53)-2.0, %% The point where floating points become unprecise + span_cmp(Axis,2,200), + cmp(Axis*Axis,round(Axis)). + +cmp_bignum(_Config) -> + span_cmp((1 bsl 58) - 1.0),%% Smallest bignum float + + %% Test when the big num goes from I to I+1 in size + [span_cmp((1 bsl (32*I)) - 1.0) || I <- lists:seq(2,30)], + + %% Test bignum greater then largest float + cmp((1 bsl (64*16)) - 1, (1 bsl (64*15)) * 1.0), + %% Test when num is much larger then float + [cmp((1 bsl (32*I)) - 1, (1 bsl (32*(I-2))) * 1.0) || I <- lists:seq(3,30)], + %% Test when float is much larger than num + [cmp((1 bsl (64*15)) * 1.0, (1 bsl (32*(I)))) || I <- lists:seq(1,29)], + + %% Test that all int == float works as they should + [true = 1 bsl N == (1 bsl N)*1.0 || N <- lists:seq(0, 1023)], + [true = (1 bsl N)*-1 == (1 bsl N)*-1.0 || N <- lists:seq(0, 1023)]. + +span_cmp(Axis) -> + span_cmp(Axis, 25). +span_cmp(Axis, Length) -> + span_cmp(Axis, round(Axis) bsr 52, Length). +span_cmp(Axis, Incr, Length) -> + [span_cmp(Axis, Incr, Length, 1 bsl (1 bsl I)) || I <- lists:seq(0,6)]. +%% This function creates tests around number axis. Both <, > and == is tested +%% for both negative and positive numbers. +%% +%% Axis: The number around which to do the tests eg. (1 bsl 58) - 1.0 +%% Incr: How much to increment the test numbers inbetween each test. +%% Length: Length/2 is the number of Incr away from Axis to test on the +%% negative and positive plane. +%% Diff: How much the float and int should differ when comparing +span_cmp(Axis, Incr, Length, Diff) -> + [begin + cmp(round(Axis*-1.0)+Diff+I*Incr,Axis*-1.0+I*Incr), + cmp(Axis*-1.0+I*Incr,round(Axis*-1.0)-Diff+I*Incr) + end || I <- lists:seq((Length div 2)*-1,(Length div 2))], + [begin + cmp(round(Axis)+Diff+I*Incr,Axis+I*Incr), + cmp(Axis+I*Incr,round(Axis)-Diff+I*Incr) + end || I <- lists:seq((Length div 2)*-1,(Length div 2))]. + +cmp(Big,Small) when is_float(Big) -> + BigGtSmall = lists:flatten( + io_lib:format("~f > ~p",[Big,Small])), + BigLtSmall = lists:flatten( + io_lib:format("~f < ~p",[Big,Small])), + BigEqSmall = lists:flatten( + io_lib:format("~f == ~p",[Big,Small])), + SmallGtBig = lists:flatten( + io_lib:format("~p > ~f",[Small,Big])), + SmallLtBig = lists:flatten( + io_lib:format("~p < ~f",[Small,Big])), + SmallEqBig = lists:flatten( + io_lib:format("~p == ~f",[Small,Big])), + cmp(Big,Small,BigGtSmall,BigLtSmall,SmallGtBig,SmallLtBig, + SmallEqBig,BigEqSmall); +cmp(Big,Small) when is_float(Small) -> + BigGtSmall = lists:flatten( + io_lib:format("~p > ~f",[Big,Small])), + BigLtSmall = lists:flatten( + io_lib:format("~p < ~f",[Big,Small])), + BigEqSmall = lists:flatten( + io_lib:format("~p == ~f",[Big,Small])), + SmallGtBig = lists:flatten( + io_lib:format("~f > ~p",[Small,Big])), + SmallLtBig = lists:flatten( + io_lib:format("~f < ~p",[Small,Big])), + SmallEqBig = lists:flatten( + io_lib:format("~f == ~p",[Small,Big])), + cmp(Big,Small,BigGtSmall,BigLtSmall,SmallGtBig,SmallLtBig, + SmallEqBig,BigEqSmall). + +cmp(Big,Small,BigGtSmall,BigLtSmall,SmallGtBig,SmallLtBig, + SmallEqBig,BigEqSmall) -> + {_,_,_,true} = {Big,Small,BigGtSmall, + Big > Small}, + {_,_,_,false} = {Big,Small,BigLtSmall, + Big < Small}, + {_,_,_,false} = {Big,Small,SmallGtBig, + Small > Big}, + {_,_,_,true} = {Big,Small,SmallLtBig, + Small < Big}, + {_,_,_,false} = {Big,Small,SmallEqBig, + Small == Big}, + {_,_,_,false} = {Big,Small,BigEqSmall, + Big == Small}. + id(I) -> I. start_node(Config) when is_list(Config) -> |