diff options
Diffstat (limited to 'lib/hipe/icode')
| -rw-r--r-- | lib/hipe/icode/hipe_beam_to_icode.erl | 111 | ||||
| -rw-r--r-- | lib/hipe/icode/hipe_icode.erl | 30 | ||||
| -rw-r--r-- | lib/hipe/icode/hipe_icode.hrl | 8 | ||||
| -rw-r--r-- | lib/hipe/icode/hipe_icode_inline_bifs.erl | 22 | ||||
| -rw-r--r-- | lib/hipe/icode/hipe_icode_liveness.erl | 1 | ||||
| -rw-r--r-- | lib/hipe/icode/hipe_icode_pp.erl | 5 | ||||
| -rw-r--r-- | lib/hipe/icode/hipe_icode_primops.erl | 23 | ||||
| -rw-r--r-- | lib/hipe/icode/hipe_icode_range.erl | 8 |
8 files changed, 177 insertions, 31 deletions
diff --git a/lib/hipe/icode/hipe_beam_to_icode.erl b/lib/hipe/icode/hipe_beam_to_icode.erl index 2abecf7f18..8e7e56b6c4 100644 --- a/lib/hipe/icode/hipe_beam_to_icode.erl +++ b/lib/hipe/icode/hipe_beam_to_icode.erl @@ -415,11 +415,13 @@ trans_fun([{wait_timeout,{_,Lbl},Reg}|Instructions], Env) -> SuspTmout = hipe_icode:mk_if(suspend_msg_timeout,[], map_label(Lbl),hipe_icode:label_name(DoneLbl)), Movs ++ [SetTmout, SuspTmout, DoneLbl | trans_fun(Instructions,Env1)]; -%%--- recv_mark/1 & recv_set/1 --- XXX: Handle better?? +%%--- recv_mark/1 & recv_set/1 --- trans_fun([{recv_mark,{f,_}}|Instructions], Env) -> - trans_fun(Instructions,Env); + Mark = hipe_icode:mk_primop([],recv_mark,[]), + [Mark | trans_fun(Instructions,Env)]; trans_fun([{recv_set,{f,_}}|Instructions], Env) -> - trans_fun(Instructions,Env); + Set = hipe_icode:mk_primop([],recv_set,[]), + [Set | trans_fun(Instructions,Env)]; %%-------------------------------------------------------------------- %%--- Translation of arithmetics {bif,ArithOp, ...} --- %%-------------------------------------------------------------------- @@ -603,6 +605,16 @@ trans_fun([{get_list,List,Head,Tail}|Instructions], Env) -> ?error_msg("hd and tl regs identical in get_list~n",[]), erlang:error(not_handled) end; +%%--- get_hd --- +trans_fun([{get_hd,List,Head}|Instructions], Env) -> + TransList = [trans_arg(List)], + I = hipe_icode:mk_primop([mk_var(Head)],unsafe_hd,TransList), + [I | trans_fun(Instructions,Env)]; +%%--- get_tl --- +trans_fun([{get_tl,List,Tail}|Instructions], Env) -> + TransList = [trans_arg(List)], + I = hipe_icode:mk_primop([mk_var(Tail)],unsafe_tl,TransList), + [I | trans_fun(Instructions,Env)]; %%--- get_tuple_element --- trans_fun([{get_tuple_element,Xreg,Index,Dst}|Instructions], Env) -> I = hipe_icode:mk_primop([mk_var(Dst)], @@ -635,6 +647,13 @@ trans_fun([{put_tuple,_Size,Reg}|Instructions], Env) -> Primop = hipe_icode:mk_primop(Dest,mktuple,Src), Moves ++ [Primop | trans_fun(Instructions2,Env2)]; %%--- put --- SHOULD NOT REALLY EXIST HERE; put INSTRUCTIONS ARE HANDLED ABOVE. +%%--- put_tuple2 --- +trans_fun([{put_tuple2,Reg,{list,Elements}}|Instructions], Env) -> + Dest = [mk_var(Reg)], + {Moves,Vars,Env2} = trans_elements(Elements, [], [], Env), + Src = lists:reverse(Vars), + Primop = hipe_icode:mk_primop(Dest, mktuple, Src), + Moves ++ [Primop | trans_fun(Instructions, Env2)]; %%--- badmatch --- trans_fun([{badmatch,Arg}|Instructions], Env) -> BadVar = trans_arg(Arg), @@ -794,7 +813,7 @@ trans_fun([{bs_append,{f,Lbl},Size,W,R,U,Binary,{field_flags,F},Dst}| SizeArg = trans_arg(Size), BinArg = trans_arg(Binary), IcodeDst = mk_var(Dst), - Offset = mk_var(reg), + Offset = mk_var(reg_gcsafe), Base = mk_var(reg), trans_bin_call({hipe_bs_primop,{bs_append,W,R,U,F}},Lbl,[SizeArg,BinArg], [IcodeDst,Base,Offset], @@ -805,7 +824,7 @@ trans_fun([{bs_private_append,{f,Lbl},Size,U,Binary,{field_flags,F},Dst}| SizeArg = trans_arg(Size), BinArg = trans_arg(Binary), IcodeDst = mk_var(Dst), - Offset = mk_var(reg), + Offset = mk_var(reg_gcsafe), Base = mk_var(reg), trans_bin_call({hipe_bs_primop,{bs_private_append,U,F}}, Lbl,[SizeArg,BinArg], @@ -844,7 +863,7 @@ trans_fun([{bs_init2,{f,Lbl},Size,_Words,_LiveRegs,{field_flags,Flags0},X}| Instructions], Env) -> Dst = mk_var(X), Flags = resolve_native_endianess(Flags0), - Offset = mk_var(reg), + Offset = mk_var(reg_gcsafe), Base = mk_var(reg), {Name, Args} = case Size of @@ -860,7 +879,7 @@ trans_fun([{bs_init_bits,{f,Lbl},Size,_Words,_LiveRegs,{field_flags,Flags0},X}| Instructions], Env) -> Dst = mk_var(X), Flags = resolve_native_endianess(Flags0), - Offset = mk_var(reg), + Offset = mk_var(reg_gcsafe), Base = mk_var(reg), {Name, Args} = case Size of @@ -1127,9 +1146,10 @@ trans_fun([{test,has_map_fields,{f,Lbl},Map,{list,Keys}}|Instructions], Env) -> lists:flatten([[K, {r, 0}] || K <- Keys])), [MapMove, TestInstructions | trans_fun(Instructions, Env2)]; trans_fun([{get_map_elements,{f,Lbl},Map,{list,KVPs}}|Instructions], Env) -> + KVPs1 = overwrite_map_last(Map, KVPs), {MapMove, MapVar, Env1} = mk_move_and_var(Map, Env), {TestInstructions, GetInstructions, Env2} = - trans_map_query(MapVar, map_label(Lbl), Env1, KVPs), + trans_map_query(MapVar, map_label(Lbl), Env1, KVPs1), [MapMove, TestInstructions, GetInstructions | trans_fun(Instructions, Env2)]; %%--- put_map_assoc --- trans_fun([{put_map_assoc,{f,Lbl},Map,Dst,_N,{list,Pairs}}|Instructions], Env) -> @@ -1157,6 +1177,32 @@ trans_fun([{put_map_exact,{f,Lbl},Map,Dst,_N,{list,Pairs}}|Instructions], Env) - gen_put_map_instrs(new, exact, TempMapVar, Dst, new, Pairs, Env1) end, [MapMove, TempMapMove, PutInstructions | trans_fun(Instructions, Env2)]; +%%--- build_stacktrace --- +trans_fun([build_stacktrace|Instructions], Env) -> + Vars = [mk_var({x,0})], %{x,0} is implict arg and dst + [hipe_icode:mk_primop(Vars,build_stacktrace,Vars), + trans_fun(Instructions, Env)]; +%%--- raw_raise --- +trans_fun([raw_raise|Instructions], Env) -> + Vars = [mk_var({x,0}),mk_var({x,1}),mk_var({x,2})], + Dst = [mk_var({x,0})], + [hipe_icode:mk_primop(Dst,raw_raise,Vars) | + trans_fun(Instructions, Env)]; +%%-------------------------------------------------------------------- +%% New binary matching added in OTP 22. +%%-------------------------------------------------------------------- +%%--- bs_get_tail --- +trans_fun([{bs_get_tail=Name,_,_,_}|_Instructions], _Env) -> + nyi(Name); +%%--- bs_start_match3 --- +trans_fun([{bs_start_match3=Name,_,_,_,_}|_Instructions], _Env) -> + nyi(Name); +%%--- bs_get_position --- +trans_fun([{bs_get_position=Name,_,_,_}|_Instructions], _Env) -> + nyi(Name); +%%--- bs_set_position --- +trans_fun([{bs_set_position=Name,_,_}|_Instructions], _Env) -> + nyi(Name); %%-------------------------------------------------------------------- %%--- ERROR HANDLING --- %%-------------------------------------------------------------------- @@ -1165,6 +1211,9 @@ trans_fun([X|_], _) -> trans_fun([], _) -> []. +nyi(Name) -> + throw({unimplemented_instruction,Name}). + %%-------------------------------------------------------------------- %% trans_call and trans_enter generate correct Icode calls/tail-calls, %% recognizing explicit fails. @@ -1505,7 +1554,10 @@ clone_dst(Dest) -> New = case hipe_icode:is_reg(Dest) of true -> - mk_var(reg); + case hipe_icode:reg_is_gcsafe(Dest) of + true -> mk_var(reg_gcsafe); + false -> mk_var(reg) + end; false -> true = hipe_icode:is_var(Dest), mk_var(new) @@ -1537,6 +1589,21 @@ trans_type_test2(function2, Lbl, Arg, Arity, Env) -> hipe_icode:label_name(True), map_label(Lbl)), {[Move1,Move2,I,True],Env2}. + +%% +%% Makes sure that if a get_map_elements instruction will overwrite +%% the map source, it will be done last. +%% +overwrite_map_last(Map, KVPs) -> + overwrite_map_last2(Map, KVPs, []). + +overwrite_map_last2(Map, [Key,Map|KVPs], _Last) -> + overwrite_map_last2(Map, KVPs, [Key,Map]); +overwrite_map_last2(Map, [Key,Val|KVPs], Last) -> + [Key,Val|overwrite_map_last2(Map, KVPs, Last)]; +overwrite_map_last2(_Map, [], Last) -> + Last. + %% %% Handles the get_map_elements instruction and the has_map_fields %% test instruction. @@ -1657,6 +1724,19 @@ trans_puts([{put,X}|Code], Vars, Moves, Env) -> trans_puts(Code, Vars, Moves, Env) -> %% No more put operations {Moves, Code, Vars, Env}. +trans_elements([X|Code], Vars, Moves, Env) -> + case type(X) of + var -> + Var = mk_var(X), + trans_elements(Code, [Var|Vars], Moves, Env); + #beam_const{value=C} -> + Var = mk_var(new), + Move = hipe_icode:mk_move(Var, hipe_icode:mk_const(C)), + trans_elements(Code, [Var|Vars], [Move|Moves], Env) + end; +trans_elements([], Vars, Moves, Env) -> + {Moves, Vars, Env}. + %%----------------------------------------------------------------------- %% The code for this instruction is a bit large because we are treating %% different cases differently. We want to use the icode `type' @@ -2126,7 +2206,12 @@ mk_var(reg) -> T = hipe_gensym:new_var(icode), V = (5*T)+4, hipe_gensym:update_vrange(icode,V), - hipe_icode:mk_reg(V). + hipe_icode:mk_reg(V); +mk_var(reg_gcsafe) -> + T = hipe_gensym:new_var(icode), + V = (5*T)+4, % same namespace as 'reg' + hipe_gensym:update_vrange(icode,V), + hipe_icode:mk_reg_gcsafe(V). %%----------------------------------------------------------------------- %% Make an icode label of proper type @@ -2296,6 +2381,12 @@ split_code([First|Code], Label, Instr) -> split_code([Instr|Code], Label, Instr, Prev, As) when Prev =:= Label -> split_code_final(Code, As); % drop both label and instruction +split_code([{icode_end_try}|_]=Code, Label, {try_case,_}, Prev, As) + when Prev =:= Label -> + %% The try_case has been replaced with try_end as an optimization. + %% Keep this instruction, since it might be the only try_end instruction + %% for this try/catch block. + split_code_final(Code, As); % drop label split_code([Other|_Code], Label, Instr, Prev, _As) when Prev =:= Label -> ?EXIT({missing_instr_after_label, Label, Instr, [Other, Prev | _As]}); split_code([Other|Code], Label, Instr, Prev, As) -> diff --git a/lib/hipe/icode/hipe_icode.erl b/lib/hipe/icode/hipe_icode.erl index 24b7ac4783..bc3403b0c5 100644 --- a/lib/hipe/icode/hipe_icode.erl +++ b/lib/hipe/icode/hipe_icode.erl @@ -515,10 +515,12 @@ annotate_variable/2, %% annotate_var_or_reg(VarOrReg, Type) unannotate_variable/1,%% unannotate_var_or_reg(VarOrReg) mk_reg/1, %% mk_reg(Id) + mk_reg_gcsafe/1, %% mk_reg_gcsafe(Id) mk_fvar/1, %% mk_fvar(Id) mk_new_var/0, %% mk_new_var() mk_new_fvar/0, %% mk_new_fvar() mk_new_reg/0, %% mk_new_reg() + mk_new_reg_gcsafe/0, %% mk_new_reg_gcsafe() mk_phi/1, %% mk_phi(Id) mk_phi/2 %% mk_phi(Id, ArgList) ]). @@ -1260,14 +1262,22 @@ is_var(_) -> false. -spec mk_reg(non_neg_integer()) -> #icode_variable{kind::'reg'}. mk_reg(V) -> #icode_variable{name=V, kind=reg}. --spec reg_name(#icode_variable{kind::'reg'}) -> non_neg_integer(). -reg_name(#icode_variable{name=Name, kind=reg}) -> Name. +-spec mk_reg_gcsafe(non_neg_integer()) -> #icode_variable{kind::'reg_gcsafe'}. +mk_reg_gcsafe(V) -> #icode_variable{name=V, kind=reg_gcsafe}. --spec reg_is_gcsafe(#icode_variable{kind::'reg'}) -> 'false'. -reg_is_gcsafe(#icode_variable{kind=reg}) -> false. % for now +-spec reg_name(#icode_variable{kind::'reg'|'reg_gcsafe'}) + -> non_neg_integer(). +reg_name(#icode_variable{name=Name, kind=reg}) -> Name; +reg_name(#icode_variable{name=Name, kind=reg_gcsafe}) -> Name. + +-spec reg_is_gcsafe(#icode_variable{kind::'reg'}) -> 'false'; + (#icode_variable{kind::'reg_gcsafe'}) -> 'true'. +reg_is_gcsafe(#icode_variable{kind=reg}) -> false; +reg_is_gcsafe(#icode_variable{kind=reg_gcsafe}) -> true. -spec is_reg(icode_argument()) -> boolean(). -is_reg(#icode_variable{kind=reg}) -> true; +is_reg(#icode_variable{kind=reg}) -> true; +is_reg(#icode_variable{kind=reg_gcsafe}) -> true; is_reg(_) -> false. -spec mk_fvar(non_neg_integer()) -> #icode_variable{kind::'fvar'}. @@ -1676,6 +1686,16 @@ mk_new_reg() -> mk_reg(hipe_gensym:get_next_var(icode)). %% +%% @doc Makes a new gcsafe register; that is, a register that is allowed to be +%% live over calls and other operations that might cause GCs and thus move heap +%% data around. +%% + +-spec mk_new_reg_gcsafe() -> icode_reg(). +mk_new_reg_gcsafe() -> + mk_reg_gcsafe(hipe_gensym:get_next_var(icode)). + +%% %% @doc Makes a new label. %% diff --git a/lib/hipe/icode/hipe_icode.hrl b/lib/hipe/icode/hipe_icode.hrl index 380ddd8371..7ed80a9ed4 100644 --- a/lib/hipe/icode/hipe_icode.hrl +++ b/lib/hipe/icode/hipe_icode.hrl @@ -41,9 +41,9 @@ -type variable_annotation() :: {atom(), any(), fun((any()) -> string())}. --record(icode_variable, {name :: non_neg_integer(), - kind :: 'var' | 'reg' | 'fvar', - annotation = [] :: [] | variable_annotation()}). +-record(icode_variable, {name :: non_neg_integer(), + kind :: 'var' | 'reg' | 'reg_gcsafe' | 'fvar', + annotation = [] :: [] | variable_annotation()}). %%--------------------------------------------------------------------- %% Type declarations for Icode instructions @@ -66,7 +66,7 @@ -type icode_funcall() :: mfa() | icode_primop(). -type icode_var() :: #icode_variable{kind::'var'}. --type icode_reg() :: #icode_variable{kind::'reg'}. +-type icode_reg() :: #icode_variable{kind::'reg'|'reg_gcsafe'}. -type icode_fvar() :: #icode_variable{kind::'fvar'}. -type icode_argument() :: #icode_const{} | #icode_variable{}. -type icode_term_arg() :: icode_var() | #icode_const{}. diff --git a/lib/hipe/icode/hipe_icode_inline_bifs.erl b/lib/hipe/icode/hipe_icode_inline_bifs.erl index 7a6947f190..16a95991e7 100644 --- a/lib/hipe/icode/hipe_icode_inline_bifs.erl +++ b/lib/hipe/icode/hipe_icode_inline_bifs.erl @@ -24,8 +24,9 @@ %% Currently inlined BIFs: %% and, or, xor, not, <, >, >=, =<, ==, /=, =/=, =:= -%% is_atom, is_boolean, is_binary, is_float, is_function, -%% is_integer, is_list, is_pid, is_port, is_reference, is_tuple +%% is_atom, is_binary, is_bitstring, is_boolean, is_float, +%% is_function, is_integer, is_list, is_map, is_number, +%% is_pid, is_port, is_reference, is_tuple -module(hipe_icode_inline_bifs). @@ -116,17 +117,20 @@ try_type_tests(I) -> I. is_type_test(Name) -> case Name of - is_integer -> {true, integer}; + is_atom -> {true, atom}; + is_binary -> {true, binary}; + is_bitstring -> {true, bitstr}; + is_boolean -> {true, boolean}; is_float -> {true, float}; - is_tuple -> {true, tuple}; - is_binary -> {true, binary}; + is_function -> {true, function}; + is_integer -> {true, integer}; is_list -> {true, list}; + is_map -> {true, map}; + is_number -> {true, number}; is_pid -> {true, pid}; - is_atom -> {true, atom}; - is_boolean -> {true, boolean}; - is_function -> {true, function}; - is_reference -> {true, reference}; is_port -> {true, port}; + is_reference -> {true, reference}; + is_tuple -> {true, tuple}; _ -> false end. diff --git a/lib/hipe/icode/hipe_icode_liveness.erl b/lib/hipe/icode/hipe_icode_liveness.erl index 51e2855108..e61529a1bb 100644 --- a/lib/hipe/icode/hipe_icode_liveness.erl +++ b/lib/hipe/icode/hipe_icode_liveness.erl @@ -77,6 +77,7 @@ print_var(#icode_variable{name=V, kind=Kind, annotation=T}) -> case Kind of var -> io:format("v~p", [V]); reg -> io:format("r~p", [V]); + reg_gcsafe -> io:format("rs~p", [V]); fvar -> io:format("fv~p", [V]) end, case T of diff --git a/lib/hipe/icode/hipe_icode_pp.erl b/lib/hipe/icode/hipe_icode_pp.erl index 5b017dca32..33d1e62884 100644 --- a/lib/hipe/icode/hipe_icode_pp.erl +++ b/lib/hipe/icode/hipe_icode_pp.erl @@ -230,7 +230,10 @@ pp_arg(Dev, Arg) -> case hipe_icode:is_reg(Arg) of true -> N = hipe_icode:reg_name(Arg), - io:format(Dev, "r~p", [N]); + case hipe_icode:reg_is_gcsafe(Arg) of + true -> io:format(Dev, "rs~p", [N]); + false -> io:format(Dev, "r~p", [N]) + end; false -> N = hipe_icode:fvar_name(Arg), io:format(Dev, "fv~p", [N]) diff --git a/lib/hipe/icode/hipe_icode_primops.erl b/lib/hipe/icode/hipe_icode_primops.erl index 50ece05259..a1f1128124 100644 --- a/lib/hipe/icode/hipe_icode_primops.erl +++ b/lib/hipe/icode/hipe_icode_primops.erl @@ -67,6 +67,8 @@ is_safe(fp_mul) -> false; is_safe(fp_sub) -> false; is_safe(mktuple) -> true; is_safe(next_msg) -> false; +is_safe(recv_mark) -> false; +is_safe(recv_set) -> false; is_safe(redtest) -> false; is_safe(select_msg) -> false; is_safe(self) -> true; @@ -130,6 +132,7 @@ is_safe({hipe_bs_primop, {bs_match_string, _, _}}) -> false; is_safe({hipe_bs_primop, {bs_append, _, _, _, _}}) -> false; is_safe({hipe_bs_primop, {bs_private_append, _, _}}) -> false; is_safe({hipe_bs_primop, bs_init_writable}) -> true; +is_safe(build_stacktrace) -> true; is_safe(#mkfun{}) -> true; is_safe(#unsafe_element{}) -> true; is_safe(#unsafe_update_element{}) -> true; @@ -165,6 +168,8 @@ fails(fp_mul) -> false; fails(fp_sub) -> false; fails(mktuple) -> false; fails(next_msg) -> false; +fails(recv_mark) -> false; +fails(recv_set) -> false; fails(redtest) -> false; fails(select_msg) -> false; fails(self) -> false; @@ -230,6 +235,8 @@ fails({hipe_bs_primop, bs_final}) -> false; fails({hipe_bs_primop, {bs_append, _, _, _, _}}) -> true; fails({hipe_bs_primop, {bs_private_append, _, _}}) -> true; fails({hipe_bs_primop, bs_init_writable}) -> true; +fails(build_stacktrace) -> false; +fails(raw_raise) -> true; fails(#mkfun{}) -> false; fails(#unsafe_element{}) -> false; fails(#unsafe_update_element{}) -> false; @@ -709,6 +716,10 @@ type(Primop, Args) -> erl_types:t_any(); next_msg -> erl_types:t_any(); + recv_mark -> + erl_types:t_any(); + recv_set -> + erl_types:t_any(); select_msg -> erl_types:t_any(); set_timeout -> @@ -723,6 +734,10 @@ type(Primop, Args) -> erl_types:t_any(); debug_native_called -> erl_types:t_any(); + build_stacktrace -> + erl_types:t_list(); + raw_raise -> + erl_types:t_atom(); {M, F, A} -> erl_bif_types:type(M, F, A, Args) end. @@ -883,6 +898,10 @@ type(Primop) -> erl_types:t_any(); next_msg -> erl_types:t_any(); + recv_mark -> + erl_types:t_any(); + recv_set -> + erl_types:t_any(); select_msg -> erl_types:t_any(); set_timeout -> @@ -891,6 +910,10 @@ type(Primop) -> erl_types:t_any(); %%% ----------------------------------------------------- %%% Other + build_stacktrace -> + erl_types:t_any(); + raw_raise -> + erl_types:t_any(); #closure_element{} -> erl_types:t_any(); redtest -> diff --git a/lib/hipe/icode/hipe_icode_range.erl b/lib/hipe/icode/hipe_icode_range.erl index 287b1c80fe..098a7a8d8c 100644 --- a/lib/hipe/icode/hipe_icode_range.erl +++ b/lib/hipe/icode/hipe_icode_range.erl @@ -1160,6 +1160,8 @@ basic_type(#gc_test{}) -> not_analysed; %% Message handling basic_type(check_get_msg) -> not_analysed; basic_type(next_msg) -> not_analysed; +basic_type(recv_mark) -> not_analysed; +basic_type(recv_set) -> not_analysed; basic_type(select_msg) -> not_analysed; basic_type(suspend_msg) -> not_analysed; %% Functions @@ -1184,7 +1186,9 @@ basic_type(unsafe_hd) -> not_analysed; basic_type(unsafe_tl) -> not_int; basic_type(#element{}) -> not_analysed; basic_type(#unsafe_element{}) -> not_analysed; -basic_type(#unsafe_update_element{}) -> not_analysed. +basic_type(#unsafe_update_element{}) -> not_analysed; +basic_type(build_stacktrace) -> not_int; +basic_type(raw_raise) -> not_int. -spec analyse_bs_get_integer(integer(), integer(), boolean()) -> range_tuple(). @@ -1629,7 +1633,7 @@ inf_bsl(_, pos_inf) -> neg_inf; inf_bsl(Number, neg_inf) when is_integer(Number), Number >= 0 -> 0; inf_bsl(_Number, neg_inf) -> -1; inf_bsl(Number1, Number2) when is_integer(Number1), is_integer(Number2) -> - %% We can not shift left with a number which is not a fixnum. We + %% We cannot shift left with a number which is not a fixnum. We %% don't have enough memory. Bits = ?BITS, if Number2 > (Bits bsl 1) -> inf_bsl(Number1, pos_inf); |