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-rw-r--r--lib/hipe/rtl/hipe_rtl_arith.inc15
-rw-r--r--lib/hipe/rtl/hipe_rtl_arith_32.erl3
2 files changed, 6 insertions, 12 deletions
diff --git a/lib/hipe/rtl/hipe_rtl_arith.inc b/lib/hipe/rtl/hipe_rtl_arith.inc
index 1f455f47ed..1dff56b074 100644
--- a/lib/hipe/rtl/hipe_rtl_arith.inc
+++ b/lib/hipe/rtl/hipe_rtl_arith.inc
@@ -30,13 +30,13 @@
%% Returns a tuple
%% {Res, Sign, Zero, Overflow, Carry}
%% Res will be a number in the range
-%% MAX_SIGNED_INT >= Res >= MIN_SIGNED_INT
+%% MAX_UNSIGNED_INT >= Res >= 0
%% The other four values are flags that are either true or false
%%
eval_alu(Op, Arg1, Arg2)
- when Arg1 =< ?MAX_SIGNED_INT,
+ when Arg1 =< ?MAX_UNSIGNED_INT,
Arg1 >= ?MIN_SIGNED_INT,
- Arg2 =< ?MAX_SIGNED_INT,
+ Arg2 =< ?MAX_UNSIGNED_INT,
Arg2 >= ?MIN_SIGNED_INT ->
Sign1 = sign_bit(Arg1),
@@ -111,7 +111,7 @@ eval_alu(Op, Arg1, Arg2)
Res = N = Z = V = C = 0,
?EXIT({"unknown alu op", Op})
end,
- {two_comp_to_erl(Res), N, Z, V, C};
+ {Res, N, Z, V, C};
eval_alu(Op, Arg1, Arg2) ->
?EXIT({argument_overflow,Op,Arg1,Arg2}).
@@ -162,16 +162,9 @@ eval_cond(Cond, Arg1, Arg2) ->
sign_bit(Val) ->
((Val bsr ?SIGN_BIT) band 1) =:= 1.
-two_comp_to_erl(V) ->
- if V > ?MAX_SIGNED_INT ->
- - ((?MAX_UNSIGNED_INT + 1) - V);
- true -> V
- end.
-
shiftmask(Arg) ->
Setbits = ?BITS - Arg,
(1 bsl Setbits) - 1.
zero(Val) ->
Val =:= 0.
-
diff --git a/lib/hipe/rtl/hipe_rtl_arith_32.erl b/lib/hipe/rtl/hipe_rtl_arith_32.erl
index 572556be1c..d790a8b981 100644
--- a/lib/hipe/rtl/hipe_rtl_arith_32.erl
+++ b/lib/hipe/rtl/hipe_rtl_arith_32.erl
@@ -24,7 +24,8 @@
%% Filename : hipe_rtl_arith_32.erl
%% Module : hipe_rtl_arith_32
%% Purpose : To implement 32-bit RTL-arithmetic
-%% Notes : The arithmetic works on 32-bit signed integers.
+%% Notes : The arithmetic works on 32-bit signed and unsigned
+%% integers.
%% The implementation is taken from the implementation
%% of arithmetic on SPARC.
%% XXX: This code is seldom used, and hence also