diff options
Diffstat (limited to 'erts/emulator/utils/beam_makeops')
| -rwxr-xr-x | erts/emulator/utils/beam_makeops | 407 |
1 files changed, 249 insertions, 158 deletions
diff --git a/erts/emulator/utils/beam_makeops b/erts/emulator/utils/beam_makeops index 0a30553f71..8041a96bcb 100755 --- a/erts/emulator/utils/beam_makeops +++ b/erts/emulator/utils/beam_makeops @@ -91,8 +91,9 @@ my @op_to_name; my @obsolete; -my %macro; -my %macro_flags; +# Instructions implemented in C. +my %c_code; # C code block, location, arguments. +my %c_code_used; # Used or not. my %hot_code; my %cold_code; @@ -259,8 +260,25 @@ if ($wordsize == 64) { # Parse the input files. # +my $in_c_code = ''; +my $c_code_block; +my $c_code_loc; +my @c_args; + while (<>) { my($op_num); + if ($in_c_code) { + if (/^\}/) { + $c_code_block =~ s/^ //mg; + chomp $c_code_block; + $c_code{$in_c_code} = + [$c_code_block,$c_code_loc,@c_args]; + $in_c_code = ''; + } else { + $c_code_block .= $_; + } + next; + } chomp; if (s/\\$//) { $_ .= <>; @@ -268,6 +286,7 @@ while (<>) { } next if /^\s*$/; next if /^\#/; + next if m@^//@; # # Handle %if. @@ -325,23 +344,6 @@ while (<>) { $hot = 0; next; } - - # - # Handle macro definitions. - # - if (/^\%macro:(.*)/) { - my($op, $macro, @flags) = split(' ', $1); - defined($macro) and $macro =~ /^-/ and - error("A macro must not start with a hyphen"); - foreach (@flags) { - /^-/ or error("Flags for macros should start with a hyphen"); - } - error("Macro for '$op' is already defined") - if defined $macro{$op}; - $macro{$op} = $macro; - $macro_flags{$op} = join('', @flags); - next; - } # # Handle transformations. @@ -352,6 +354,22 @@ while (<>) { } # + # Handle C code blocks. + # + if (/^(\w+)\(([^\)]*)\)\s*{/) { + my $name = $1; + $in_c_code = $name; + $c_code_block = ''; + @c_args = parse_c_args($2); + $c_code_loc = "$ARGV($.)"; + if (defined $c_code{$name}) { + my $where = $c_code{$name}->[1]; + error("$name: already defined at $where"); + } + next; + } + + # # Parse off the number of the operation. # $op_num = undef; @@ -449,6 +467,18 @@ $num_file_opcodes = @gen_opname; &$target(); # +# Ensure that all C code implementations have been used. +# +{ + my(@unused) = grep(!$c_code_used{$_}, keys %c_code); + foreach my $unused (@unused) { + my(undef,$where) = @{$c_code{$unused}}; + warn "$where: $unused is unused\n"; + } + die "\n" if @unused; +} + +# # Produce output needed by the emulator/loader. # @@ -893,6 +923,18 @@ sub save_specific_ops { } } +sub parse_c_args { + local($_) = @_; + my @res; + + while (s/^(\w[\w\d]*)\s*//) { + push @res, $1; + s/^,\s*// or last; + } + $_ eq '' or error("garbage in argument list: $_"); + @res; +} + sub error { my(@message) = @_; my($where) = $. ? "$ARGV($.): " : ""; @@ -940,51 +982,20 @@ sub comment { sub basic_generator { my($name, $hot, @args) = @_; - my($size) = 0; - my($macro) = ''; - my($flags) = ''; - my(@f); - my(@f_types); - my($fail_type); - my($prefix) = ''; - my($tmp_arg_num) = 1; - my($pack_spec) = ''; - my($var_decls) = ''; - my($i); - my($no_prefetch) = 0; - - # The following argument types should be included as macro arguments. - my(%incl_arg) = ('c' => 1, - 'i' => 1, - 'a' => 1, - 'A' => 1, - 'N' => 1, - 'U' => 1, - 'I' => 1, - 't' => 1, - 'P' => 1, - 'Q' => 1, - ); - - # Pick up the macro to use and its flags (if any). - - $macro = $macro{$name} if defined $macro{$name}; - $flags = $macro_flags{$name} if defined $macro_flags{$name}; + my $size = 0; + my $flags = ''; + my @f; + my $prefix = ''; + my $tmp_arg_num = 1; + my $pack_spec = ''; + my $var_decls = ''; # - # Add any arguments to be included as macro arguments (for instance, - # 'p' is usually not an argument, except for calls). + # Pack arguments for hot code with an implementation. # - while ($flags =~ /-arg_(\w)/g) { - $incl_arg{$1} = 1; - }; - - # - # Pack arguments if requested. - # - - if ($flags =~ /-pack/ && $hot) { + my $c_code = $c_code{$name}; + if ($hot and defined $c_code) { ($prefix, $pack_spec, @args) = do_pack(@args); } @@ -997,40 +1008,41 @@ sub basic_generator { my($this_size) = $arg_size{$_}; SWITCH: { - /^pack:(\d):(.*)/ and do { push(@f, $2); - push(@f_types, 'packed'); - $this_size = $1; - last SWITCH; - }; - /r/ and do { push(@f, "r(0)"); push(@f_types, $_); last SWITCH }; - /[xy]/ and do { push(@f, "$_" . "b(Arg($size))"); - push(@f_types, $_); - last SWITCH; - }; - /n/ and do { push(@f, "NIL"); push(@f_types, $_); last SWITCH }; - /s/ and do { my($tmp) = "targ$tmp_arg_num"; - $var_decls .= "Eterm $tmp; "; - $tmp_arg_num++; - push(@f, $tmp); - push(@f_types, $_); - $prefix .= "GetR($size, $tmp);\n"; - last SWITCH; }; - /d/ and do { $var_decls .= "Eterm dst; Eterm* dst_ptr; "; - push(@f, "*dst_ptr"); - push(@f_types, $_); - $prefix .= "dst = Arg($size);\n"; - $prefix .= "dst_ptr = REG_TARGET_PTR(dst);\n"; - last SWITCH; - }; - defined($incl_arg{$_}) - and do { push(@f, "Arg($size)"); - push(@f_types, $_); - last SWITCH; - }; - - /[fp]/ and do { $fail_type = $_; last SWITCH }; - - /[eLIFEbASjPowlq]/ and do { last SWITCH; }; + /^pack:(\d):(.*)/ and do { + push(@f, $2); + $this_size = $1; + last SWITCH; + }; + /r/ and do { + push(@f, "r(0)"); + last SWITCH; + }; + /[lxy]/ and do { + push(@f, $_ . "b(Arg($size))"); + last SWITCH; + }; + /n/ and do { + push(@f, "NIL"); + last SWITCH; + }; + /s/ and do { + my($tmp) = "targ$tmp_arg_num"; + $var_decls .= "Eterm $tmp;\n"; + $tmp_arg_num++; + push(@f, $tmp); + $prefix .= "GetR($size, $tmp);\n"; + last SWITCH; + }; + /d/ and do { + $var_decls .= "Eterm dst = Arg($size);\n" . + "Eterm* dst_ptr = REG_TARGET_PTR(dst);\n"; + push(@f, "*dst_ptr"); + last SWITCH; + }; + defined $arg_size{$_} and do { + push(@f, "Arg($size)"); + last SWITCH; + }; die "$name: The generator can't handle $_, at"; } @@ -1038,77 +1050,156 @@ sub basic_generator { } # - # Add a fail action macro if requested. + # If the implementation is in beam_emu.c, there is nothing + # more to do. # + unless (defined $c_code) { + return ($size+1, undef, ''); + } - $flags =~ /-fail_action/ and do { - $no_prefetch = 1; - if (!defined $fail_type) { - my($i); - for ($i = 0; $i < @f_types; $i++) { - local($_) = $f_types[$i]; - /[rxycians]/ and do { push(@f, "Badmatch($f[$i])"); next }; - } - } elsif ($fail_type eq 'f') { - push(@f, "ClauseFail()"); - } else { - my($i); - for ($i = 0; $i < @f_types; $i++) { - local($_) = $f_types[$i]; - /[rxycians]/ and do { push(@f, "Badmatch($f[$i])"); next }; - } - } - }; + # + # Generate main body of the implementation. + # + my $macro_code; + if (defined $c_code) { + my($c_code,$where,@c_args) = @{$c_code}; + my %bindings; + $c_code_used{$name} = 1; + + if (@f != @c_args) { + error("$where: defining '$name' with ", scalar(@c_args), + " arguments instead of expected ", scalar(@f), " arguments"); + } + + for (my $i = 0; $i < @f; $i++) { + my $var = $c_args[$i]; + $bindings{$var} = $f[$i]; + } + $bindings{'NEXT_INSTRUCTION'} = "I+" . ($size + 1); + $c_code = eval { expand_all($c_code, \%bindings) }; + unless (defined $c_code) { + warn $@; + error("... from the body of $name at $where"); + } + my(@comments) = $c_code =~ m@//[|]\s*(.*)@g; + $flags = "@comments"; + $macro_code = "$prefix$c_code"; + } # - # Add a size argument if requested. + # Generate code for transferring to the next instruction. # + my $dispatch_next; + my $offset = $size + 1; + + if ($flags =~ /-no_next/) { + $dispatch_next = ""; + } elsif ($flags =~ /-no_prefetch/) { + $dispatch_next = "\nI += $offset;\n" . + "ASSERT(VALID_INSTR(*I));\n" . + "Goto(*I);"; + } else { + $var_decls .= "BeamInstr* _nextpf = " . + "(BeamInstr *) I[$offset];\n"; + $dispatch_next = "\nI += $offset;\n" . + "ASSERT(VALID_INSTR(_nextpf));\n" . + "Goto(_nextpf);"; + } - $flags =~ /-size/ and do { - push(@f, $size); - }; - - # Generate the macro if requested. - my($code); - if (defined $macro{$name}) { - my($macro_code) = "$prefix$macro(" . join(', ', @f) . ");"; - $var_decls .= "BeamInstr tmp_packed1;" - if $macro_code =~ /tmp_packed1/; - $var_decls .= "BeamInstr tmp_packed2;" - if $macro_code =~ /tmp_packed2/; - if ($flags =~ /-nonext/) { - $code = join("\n", - "{ $var_decls", - $macro_code, - "}"); - } elsif ($flags =~ /-goto:(\S*)/) { - my $goto = $1; - $code = join("\n", - "{ $var_decls", - $macro_code, - "I += $size + 1;", - "goto $goto;", - "}"); - } elsif ($no_prefetch) { - $code = join("\n", - "{ $var_decls", - $macro_code, - "Next($size);", - "}", ""); - } else { - $code = join("\n", - "{ $var_decls", - "BeamInstr* next;", - "PreFetch($size, next);", - "$macro_code", - "NextPF($size, next);", - "}", ""); - } + # + # Assemble the complete code for the instruction. + # + my $code = join("\n", + "{", + "$var_decls$macro_code$dispatch_next", + "}", ""); + ($size+1, $code, $pack_spec); +} + +sub expand_all { + my($code,$bindings_ref) = @_; + my %bindings = %{$bindings_ref}; + + # Expand all $Var occurrences. + $code =~ s/[\$](\w[\w\d]*)(?!\()/defined $bindings{$1} ? $bindings{$1} : "\$$1"/ge; + + # Find calls to macros, $name(...), and expand them. + my $res = ""; + while ($code =~ /[\$](\w[\w\d]*)\(/) { + my $macro_name = $1; + my $keep = substr($code, 0, $-[0]); + my $after = substr($code, $+[0]); + + # Keep the special, pre-defined bindings. + my %new_bindings; + foreach my $key (qw(NEXT_INSTRUCTION)) { + $new_bindings{$key} = $bindings{$key}; + } + + my $body; + ($body,$code) = expand_macro($macro_name, $after, \%new_bindings); + $res .= "$keep$body"; + } + + $res . $code; +} + +sub expand_macro { + my($name,$rest,$bindings_ref) = @_; + + my $c_code = $c_code{$name}; + defined $c_code or + error("calling undefined macro '$name'..."); + $c_code_used{$name} = 1; + my ($body,$where,@vars) = @{$c_code}; + + # Separate the arguments into @args; + my @args; + my $level = 1; + my %inc = ('(' => 1, ')' => -1, + '[' => 1, ']' => -1, + '{' => 1, '}' => -1); + my $arg = undef; + while ($rest =~ /([,\(\[\{\}\]\)]|([^,\(\[\{\}\]\)]*))/g) { + my $token = $1; + my $inc = $inc{$token} || 0; + $level += $inc; + if ($level == 0) { + $rest = substr($rest, pos($rest)); + push @args, $arg if defined $arg; + last; + } + if ($token eq ',') { + if ($level == 1) { + push @args, $arg; + $arg = ""; + } + next; + } + $arg .= $token; + } + + # Trim leading whitespace from each argument. + foreach my $arg (@args) { + $arg =~ s/^\s*//; } - # Return the size and code for the macro (if any). - $size++; - ($size, $code, $pack_spec); + # Now combine bindings from the parameter names and arguments. + my %bindings = %{$bindings_ref}; + if (@vars != @args) { + error("calling $name with ", scalar(@args), + " arguments instead of expected ", scalar(@vars), " arguments..."); + } + for (my $i = 0; $i < @vars; $i++) { + $bindings{$vars[$i]} = $args[$i]; + } + + $body = eval { expand_all($body, \%bindings) }; + unless (defined $body) { + warn $@; + die "... from the body of $name at $where\n"; + } + ("do {\n$body\n} while (0)",$rest); } sub do_pack { @@ -1201,7 +1292,7 @@ sub do_pack { $did_some_packing = 1; if ($ap == 0) { - $pack_prefix .= "tmp_packed$tmpnum = Arg($size);\n"; + $pack_prefix .= "Eterm tmp_packed$tmpnum = Arg($size);\n"; $up .= "p"; $down = "P$down"; $this_size = 1; |