diff options
Diffstat (limited to 'lib/compiler/src/beam_validator.erl')
| -rw-r--r-- | lib/compiler/src/beam_validator.erl | 31 |
1 files changed, 18 insertions, 13 deletions
diff --git a/lib/compiler/src/beam_validator.erl b/lib/compiler/src/beam_validator.erl index 942d69a756..ab5fedf3bf 100644 --- a/lib/compiler/src/beam_validator.erl +++ b/lib/compiler/src/beam_validator.erl @@ -31,8 +31,6 @@ -import(lists, [reverse/1,foldl/3,foreach/2,dropwhile/2]). --define(MAXREG, 1024). - %%-define(DEBUG, 1). -ifdef(DEBUG). -define(DBG_FORMAT(F, D), (io:format((F), (D)))). @@ -970,9 +968,9 @@ get_fls(#vst{current=#st{fls=Fls}}) when is_atom(Fls) -> Fls. init_fregs() -> 0. -set_freg({fr,Fr}, #vst{current=#st{f=Fregs0}=St}=Vst) +set_freg({fr,Fr}=Freg, #vst{current=#st{f=Fregs0}=St}=Vst) when is_integer(Fr), 0 =< Fr -> - limit_check(Fr), + check_limit(Freg), Bit = 1 bsl Fr, if Fregs0 band Bit =:= 0 -> @@ -985,9 +983,10 @@ set_freg(Fr, _) -> error({bad_target,Fr}). assert_freg_set({fr,Fr}=Freg, #vst{current=#st{f=Fregs}}) when is_integer(Fr), 0 =< Fr -> if - Fregs band (1 bsl Fr) =/= 0 -> - limit_check(Fr); - true -> error({uninitialized_reg,Freg}) + (Fregs bsr Fr) band 1 =:= 0 -> + error({uninitialized_reg,Freg}); + true -> + ok end; assert_freg_set(Fr, _) -> error({bad_source,Fr}). @@ -1066,16 +1065,16 @@ set_type(Type, {x,_}=Reg, Vst) -> set_type_reg(Type, Reg, Vst); set_type(Type, {y,_}=Reg, Vst) -> set_type_y(Type, Reg, Vst); set_type(_, _, #vst{}=Vst) -> Vst. -set_type_reg(Type, {x,X}, #vst{current=#st{x=Xs}=St}=Vst) +set_type_reg(Type, {x,X}=Reg, #vst{current=#st{x=Xs}=St}=Vst) when is_integer(X), 0 =< X -> - limit_check(X), + check_limit(Reg), Vst#vst{current=St#st{x=gb_trees:enter(X, Type, Xs)}}; set_type_reg(Type, Reg, Vst) -> set_type_y(Type, Reg, Vst). set_type_y(Type, {y,Y}=Reg, #vst{current=#st{y=Ys0}=St}=Vst) when is_integer(Y), 0 =< Y -> - limit_check(Y), + check_limit(Reg), Ys = case gb_trees:lookup(Y, Ys0) of none -> error({invalid_store,Reg,Type}); @@ -1591,9 +1590,15 @@ return_type_math(pow, 2) -> {float,[]}; return_type_math(pi, 0) -> {float,[]}; return_type_math(F, A) when is_atom(F), is_integer(A), A >= 0 -> term. -limit_check(Num) when is_integer(Num), Num >= ?MAXREG -> - error(limit); -limit_check(_) -> ok. +check_limit({x,X}) when is_integer(X), X < 1023 -> + %% Note: x(1023) is reserved for use by the BEAM loader. + ok; +check_limit({y,Y}) when is_integer(Y), Y < 1024 -> + ok; +check_limit({fr,Fr}) when is_integer(Fr), Fr < 1024 -> + ok; +check_limit(_) -> + error(limit). min(A, B) when is_integer(A), is_integer(B), A < B -> A; min(A, B) when is_integer(A), is_integer(B) -> B. |