From 1257cee4faf33cc69c9452ba54afe5d5dbd4ddf6 Mon Sep 17 00:00:00 2001 From: Kostis Sagonas Date: Thu, 3 Nov 2016 17:16:01 +0100 Subject: Fix the native code translation of bs_match_string This fixes a HiPE bug reported on erlang-questions on 2/11/2016. The BEAM to ICode tranaslation of the bs_match_string instruction, written long ago for binaries (i.e., with byte-sized strings), tried to do a `clever' translation of even bit-sized strings using a HiPE primop that took a `Size' argument expressed in *bytes*. ICode is not really the place to do such a thing, and moreover there is really no reason for the HiPE primop not to take a Size argument expressed in *bits* instead. This commit changes the `Size' argument to be in bits, postpones the translation of the bs_match_string primop Fixed in a pair-programming/debugging session with @margnus1. until RTL and does a proper translation using bit-sized quantities there. --- lib/hipe/rtl/hipe_rtl_binary.erl | 2 +- lib/hipe/rtl/hipe_rtl_binary_match.erl | 37 +++++++++++++++++----------------- 2 files changed, 19 insertions(+), 20 deletions(-) (limited to 'lib/hipe/rtl') diff --git a/lib/hipe/rtl/hipe_rtl_binary.erl b/lib/hipe/rtl/hipe_rtl_binary.erl index fb9c0c196d..9b400f4c93 100644 --- a/lib/hipe/rtl/hipe_rtl_binary.erl +++ b/lib/hipe/rtl/hipe_rtl_binary.erl @@ -19,7 +19,7 @@ %%% %CopyrightEnd% %%% %%%------------------------------------------------------------------- -%%% File : hipe_rtl_binary_2.erl +%%% File : hipe_rtl_binary.erl %%% Author : Per Gustafsson %%% Description : %%% diff --git a/lib/hipe/rtl/hipe_rtl_binary_match.erl b/lib/hipe/rtl/hipe_rtl_binary_match.erl index 528672b893..d999cd2743 100644 --- a/lib/hipe/rtl/hipe_rtl_binary_match.erl +++ b/lib/hipe/rtl/hipe_rtl_binary_match.erl @@ -270,24 +270,23 @@ gen_rtl({bs_save, Slot}, [NewMs], [Ms], TrueLblName, _FalseLblName) -> set_field_from_term({matchstate, {saveoffset, Slot}}, Ms, Offset), hipe_rtl:mk_goto(TrueLblName)]; %% ----- bs_match_string ----- -gen_rtl({bs_match_string, String, ByteSize}, Dst, [Ms], +gen_rtl({bs_match_string, String, BitSize}, Dst, [Ms], TrueLblName, FalseLblName) -> {[Offset, BinSize, Base], Instrs} = extract_matchstate_vars([offset, binsize, base], Ms), [SuccessLbl, ALbl, ULbl] = create_lbls(3), [NewOffset, BitOffset] = create_gcsafe_regs(2), - Unit = hipe_rtl_arch:word_size() - 1, - Loops = ByteSize div Unit, - Init = + Unit = (hipe_rtl_arch:word_size() - 1) * ?BYTE_SIZE, + Init = [Instrs, opt_update_ms(Dst, Ms), - check_size(Offset, hipe_rtl:mk_imm(ByteSize*?BYTE_SIZE), BinSize, + check_size(Offset, hipe_rtl:mk_imm(BitSize), BinSize, NewOffset, hipe_rtl:label_name(SuccessLbl), FalseLblName), SuccessLbl], SplitCode = [hipe_rtl:mk_alub(BitOffset, Offset, 'and', hipe_rtl:mk_imm(?LOW_BITS), eq, hipe_rtl:label_name(ALbl), hipe_rtl:label_name(ULbl))], - Loops = ByteSize div Unit, + Loops = BitSize div Unit, SkipSize = Loops * Unit, {ACode1, UCode1} = case Loops of @@ -297,9 +296,9 @@ gen_rtl({bs_match_string, String, ByteSize}, Dst, [Ms], create_loops(Loops, Unit, String, Base, Offset, BitOffset, FalseLblName) end, - <<_:SkipSize/binary, RestString/binary>> = String, + <<_:SkipSize/bits, RestString/bits>> = String, {ACode2, UCode2} = - case ByteSize rem Unit of + case BitSize rem Unit of 0 -> {[], []}; Rem -> @@ -393,12 +392,12 @@ validate_unicode_retract_c_code(Src, Ms, TrueLblName, FalseLblName) -> create_loops(Loops, Unit, String, Base, Offset, BitOffset, FalseLblName) -> [Reg] = create_gcsafe_regs(1), AlignedFun = fun(Value) -> - [get_int_to_reg(Reg, Unit*?BYTE_SIZE, Base, Offset, 'srl', + [get_int_to_reg(Reg, Unit, Base, Offset, 'srl', {unsigned, big}), update_and_test(Reg, Unit, Offset, Value, FalseLblName)] end, UnAlignedFun = fun(Value) -> - [get_unaligned_int_to_reg(Reg, Unit*?BYTE_SIZE, + [get_unaligned_int_to_reg(Reg, Unit, Base, Offset, BitOffset, 'srl', {unsigned, big})| update_and_test(Reg, Unit, Offset, Value, FalseLblName)] @@ -406,31 +405,31 @@ create_loops(Loops, Unit, String, Base, Offset, BitOffset, FalseLblName) -> {create_loops(Loops, Unit, String, AlignedFun), create_loops(Loops, Unit, String, UnAlignedFun)}. -create_rests(Rem, String, Base, Offset, BitOffset, FalseLblName) -> +create_rests(RemBits, String, Base, Offset, BitOffset, FalseLblName) -> [Reg] = create_gcsafe_regs(1), AlignedFun = fun(Value) -> - [get_int_to_reg(Reg, Rem*?BYTE_SIZE, Base, Offset, 'srl', + [get_int_to_reg(Reg, RemBits, Base, Offset, 'srl', {unsigned, big})| just_test(Reg, Value, FalseLblName)] end, UnAlignedFun = fun(Value) -> - [get_unaligned_int_to_reg(Reg, Rem*?BYTE_SIZE, + [get_unaligned_int_to_reg(Reg, RemBits, Base, Offset, BitOffset, 'srl', {unsigned, big})| just_test(Reg, Value, FalseLblName)] end, - {create_loops(1, Rem, String, AlignedFun), - create_loops(1, Rem, String, UnAlignedFun)}. + {create_loops(1, RemBits, String, AlignedFun), + create_loops(1, RemBits, String, UnAlignedFun)}. create_loops(0, _Unit, _String, _IntFun) -> []; create_loops(N, Unit, String, IntFun) -> - {Value, RestString} = get_value(Unit,String), + {Value, RestString} = get_value(Unit, String), [IntFun(Value), create_loops(N-1, Unit, RestString, IntFun)]. update_and_test(Reg, Unit, Offset, Value, FalseLblName) -> - [add_to_offset(Offset, Offset, hipe_rtl:mk_imm(Unit*?BYTE_SIZE), FalseLblName), + [add_to_offset(Offset, Offset, hipe_rtl:mk_imm(Unit), FalseLblName), just_test(Reg, Value, FalseLblName)]. just_test(Reg, Value, FalseLblName) -> @@ -439,8 +438,8 @@ just_test(Reg, Value, FalseLblName) -> hipe_rtl:label_name(ContLbl), FalseLblName), ContLbl]. -get_value(N,String) -> - <> = String, +get_value(N, String) -> + <> = String, {I, Rest}. make_int_gc_code(I) when is_integer(I) -> -- cgit v1.2.3