X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fscripts%2Fgenerate_regalloc_if.pl;h=f111b477298d7d8cf8c1795c41f12bc17b43f5b3;hb=25abc6c935291ab5a0200de73db5ebc412b8a745;hp=a379169ce36f3a5f9e04f0d7b72afbb1bc184d26;hpb=2adf84106c02caf097c2d6cf1764706bdc437bcc;p=libfirm diff --git a/ir/be/scripts/generate_regalloc_if.pl b/ir/be/scripts/generate_regalloc_if.pl index a379169ce..f111b4772 100755 --- a/ir/be/scripts/generate_regalloc_if.pl +++ b/ir/be/scripts/generate_regalloc_if.pl @@ -1,5 +1,24 @@ #!/usr/bin/perl -w +# +# Copyright (C) 1995-2008 University of Karlsruhe. All right reserved. +# +# This file is part of libFirm. +# +# This file may be distributed and/or modified under the terms of the +# GNU General Public License version 2 as published by the Free Software +# Foundation and appearing in the file LICENSE.GPL included in the +# packaging of this file. +# +# Licensees holding valid libFirm Professional Edition licenses may use +# this file in accordance with the libFirm Commercial License. +# Agreement provided with the Software. +# +# This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE +# WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR +# PURPOSE. +# + # This script generates C code which creates ands sets up functions and # data structures for the register allocator. # Creation: 2005/11/14 @@ -14,7 +33,6 @@ my $target_dir = $ARGV[1]; our $arch; our %reg_classes; -our %nodes; our %cpu; # include spec file @@ -23,15 +41,14 @@ my $return; use strict "subs"; unless ($return = do $specfile) { - warn "couldn't parse $specfile: $@" if $@; - warn "couldn't do $specfile: $!" unless defined $return; - warn "couldn't run $specfile" unless $return; + die "Fatal error: couldn't parse $specfile: $@" if $@; + die "Fatal error: couldn't do $specfile: $!" unless defined $return; + die "Fatal error: couldn't run $specfile" unless $return; } use strict "subs"; my $target_c = $target_dir."/gen_".$arch."_regalloc_if.c"; my $target_h = $target_dir."/gen_".$arch."_regalloc_if.h"; -my $target_h_t = $target_dir."/gen_".$arch."_regalloc_if_t.h"; # helper function sub translate_reg_type { @@ -44,26 +61,18 @@ sub translate_reg_type { my @types; if ($t & 1) { - push(@types, "arch_register_type_caller_save"); - } - - if ($t & 2) { - push(@types, "arch_register_type_callee_save"); - } - - if ($t & 4) { push(@types, "arch_register_type_ignore"); } - if ($t & 8) { + if ($t & 2) { push(@types, "arch_register_type_joker"); } - if ($t & 16) { + if ($t & 4) { push(@types, "arch_register_type_virtual"); } - if ($t & 32) { + if ($t & 8) { push(@types, "arch_register_type_state"); } @@ -72,542 +81,261 @@ sub translate_reg_type { } # stacks for output -my @obst_regtypes_def; # stack for the register type variables definitions -my @obst_regtypes_decl;# stack for the register type variables declarations -my @obst_regclasses; # stack for the register class variables -my @obst_classdef; # stack to define a name for a class index -my @obst_regdef; # stack to define a name for a register index -my @obst_reginit; # stack for the register type inits -my @obst_req; # stack for the register requirements -my @obst_limit_func; # stack for functions to return a subset of a register class -my @obst_header_all; # stack for some extern struct defs needed for bearch_$arch include -my @obst_header_t; - -my $numregs; +my $regtypes_def; # stack for the register type variables definitions +my $regtypes_decl;# stack for the register type variables declarations +my @regclasses; # stack for the register class variables +my $classdef; # stack to define a name for a class index +my $regdef; # stack to define a name for a register index +my $regdef2; +my $regcounts; +my $reginit; # stack for the register type inits +my $single_constraints_decls; +my $single_constraints; + my $class_ptr; my $class_idx = 0; -my $tmp; - -my %reg2class; -my %regclass2len; +my %regclass2len = (); +my %reg2class = (); -push(@obst_classdef, "enum reg_classes {\n"); +$classdef .= "enum reg_classes {\n"; my $class_mode; -# assure, the initialization is done only once -push(@obst_reginit, "\tstatic int run_once = 0;\n"); -push(@obst_reginit, "\n"); -push(@obst_reginit, "\tif (run_once)\n"); -push(@obst_reginit, "\t\treturn;\n"); -push(@obst_reginit, "\trun_once = 1;\n"); - -# generate register type and class variable, init function and default requirements foreach my $class_name (keys(%reg_classes)) { - my @class = @{ $reg_classes{"$class_name"} }; - my $old_classname = $class_name; - - $class_name = $arch."_".$class_name; - $numregs = "N_".$class_name."_REGS"; - $class_ptr = "&".$arch."_reg_classes[CLASS_".$class_name."]"; - $class_mode = pop(@class)->{"mode"}; - - push(@obst_regtypes_decl, "extern arch_register_t ".$class_name."_regs[$numregs];\n"); - push(@obst_regtypes_def, "arch_register_t ".$class_name."_regs[$numregs];\n"); - - push(@obst_classdef, "\tCLASS_$class_name = $class_idx,\n"); - push(@obst_regclasses, "{ \"$class_name\", $numregs, NULL, ".$class_name."_regs }"); + my @class = @{ $reg_classes{"$class_name"} }; my $idx = 0; - push(@obst_reginit, "\t/* Init of all registers in class '$class_name' */\n\n"); - push(@obst_reginit, "\t/* set largest possible mode for '$class_name' */\n"); - push(@obst_reginit, "\t$arch\_reg_classes[CLASS_".$class_name."].mode = $class_mode;\n\n"); - push(@obst_regdef, "enum reg_".$class_name."_values {\n"); foreach (@class) { - # realname is name if not set by user - $_->{"realname"} = $_->{"name"} if (! exists($_->{"realname"})); - - $reg2class{$_->{"name"}} = { "class" => $old_classname, "index" => $idx }; # remember reg to class for later use - push(@obst_regdef, "\tREG_".uc($_->{"name"})." = $idx,\n"); - push(@obst_reginit, "\t${class_name}_regs[$idx].name = \"".$_->{"realname"}."\";\n"); - push(@obst_reginit, "\t${class_name}_regs[$idx].reg_class = $class_ptr;\n"); - push(@obst_reginit, "\t${class_name}_regs[$idx].index = $idx;\n"); - push(@obst_reginit, "\t${class_name}_regs[$idx].type = ".translate_reg_type($_->{"type"}).";\n"); - push(@obst_reginit, "\t${class_name}_regs[$idx].data = ".get_execunit_variable_name($_->{"unit"}).";\n"); - push(@obst_reginit, "\n"); + if (defined($_->{name})) { + $reg2class{$_->{name}} = { + "class" => $class_name, + "index" => $idx + }; + } $idx++; } - $regclass2len{$old_classname} = $idx; - push(@obst_regdef, "\t$numregs = $idx\n"); - push(@obst_regdef, "};\n\n"); - - $class_idx++; + $regclass2len{$class_name} = $idx; } -push(@obst_classdef, "\tN_CLASSES = ".scalar(keys(%reg_classes))."\n"); -push(@obst_classdef, "};\n\n"); - -# generate node-register constraints -foreach my $op (keys(%nodes)) { - my %n = %{ $nodes{"$op"} }; - - next if (!exists($n{"reg_req"})); - - $op = $arch."_".$op; - - push(@obst_req, "/* IN requirements for '$op' */\n"); - # check for argument requirements - if (exists($n{"reg_req"}{"in"})) { - generate_requirements(\%n, $op, "in"); - } +sub get_limited_array { + my $reg = shift; + my $regclass = $reg2class{"$reg"}{"class"}; + my $ucname = uc($reg); + my $result = "{ "; + + my $limitedbitsetlen = $regclass2len{$regclass}; + my $arraylen = ($limitedbitsetlen+31) / 32; + my $firstreg = uc($reg_classes{$regclass}[0]->{"name"}); + my $classuc = uc($regclass); + my $first = 1; + for (my $i = 0; $i < $arraylen; ++$i) { + if ($first) { + $first = 0; + } else { + $result .= ", "; + } - push(@obst_req, "/* OUT requirements for '$op' */\n"); - # check for result requirements - if (exists($n{"reg_req"}{"out"})) { - generate_requirements(\%n, $op, "out"); + my $index = $reg2class{"$reg"}{"index"}; + if ($index >= $i*32 && $index < ($i+1)*32) { + if ($i > 0) { + $result .= "(1 << (REG_${classuc}_${ucname} % 32))"; + } else { + $result .= "(1 << REG_${classuc}_${ucname})"; + } + } else { + $result .= "0"; + } } + $result .= " }"; } +# generate register type and class variable, init function and default requirements +foreach my $class_name (keys(%reg_classes)) { + my @class = @{ $reg_classes{"$class_name"} }; + my $old_classname = $class_name; + $class_name = $arch."_".$class_name; + $class_ptr = "&".$arch."_reg_classes[CLASS_".$class_name."]"; + my $flags = pop(@class); + $class_mode = $flags->{"mode"}; + my $class_flags = $flags->{"flags"}; + my $flags_prepared = ""; -# generate header _t (internal usage) file -open(OUT, ">$target_h_t") || die("Could not open $target_h_t, reason: $!\n"); - -my $creation_time = localtime(time()); + if(defined($class_flags)) { + my $first = 1; + foreach my $flag (split(/\|/, $class_flags)) { + if(!$first) { + $flags_prepared .= "|"; + } else { + $first = 0; + } + $flags_prepared .= "arch_register_class_flag_$flag"; + } + } else { + $flags_prepared = "arch_register_class_flag_none"; + } -$tmp = uc($arch); + $single_constraints .= <{"name"}) . "]"; + push(@regclasses, "{ $class_idx, \"$class_name\", $numregs, NULL, $first_reg, $flags_prepared, &${arch}_class_reg_req_${old_classname} }"); -#include "gen_${arch}_regalloc_if.h" + my $idx = 0; + $reginit .= "\t$arch\_reg_classes[CLASS_".$class_name."].mode = $class_mode;\n"; + my $lastreg; + foreach (@class) { + my $name = $_->{"name"}; + my $ucname = uc($name); + my $type = "arch_register_type_none"; + $type = translate_reg_type($_->{"type"}) if (exists($_->{"type"})); + # realname is name if not set by user + $_->{"realname"} = $_->{"name"} if (! exists($_->{"realname"})); + my $realname = $_->{realname}; + my $classuc = uc($old_classname); + + $regdef .= "\tREG_${ucname},\n"; + $regdef2 .= "\tREG_${classuc}_${ucname} = $idx,\n"; + + $regtypes_def .= <$target_h") || die("Could not open $target_h, reason: $!\n"); +open(OUT, ">$target_h") || die("Fatal error: Could not open $target_h, reason: $!\n"); -$creation_time = localtime(time()); +my $creation_time = localtime(time()); print OUT<$target_c") || die("Could not open $target_c, reason: $!\n"); +open(OUT, ">$target_c") || die("Fatal error: Could not open $target_c, reason: $!\n"); $creation_time = localtime(time()); print OUT<{"reg_req"}{"$inout"})) { - my @reqs = @{ $n->{"reg_req"}{"$inout"} }; - - for (my $idx = 0; $idx <= $#reqs; $idx++) { - my $class = undef; - - if ($reqs[$idx] eq "none") { - $class = "none"; - } elsif (is_reg_class($reqs[$idx])) { - $class = $reqs[$idx]; - } else { - my @regs = split(/ /, $reqs[$idx]); -GET_CLASS: foreach my $reg (@regs) { - if ($reg =~ /!?(in|out)\_r\d+/ || $reg =~ /!in/) { - $class = "UNKNOWN_CLASS"; - } - else { - $class = get_reg_class($reg); - if (!defined $class) { - die("Could not get ".uc($inout)." register class for '$op' pos $idx (reg $reg) ... exiting.\n"); - } - else { - last GET_CLASS; - } # !defined class - } # if (reg =~ ... - } # foreach - } # if - - push(@idx_class, $class); - } # for - } # if - - return @idx_class; -} - -### -# Generates the requirements for the given description -### -sub generate_requirements { - my $n = shift; - my $op = shift; - my $inout = shift; - - # get classes for the complementary direction - my $outin = ($inout eq "in") ? "out" : "in"; - - my @reqs = @{ $n->{"reg_req"}{"$inout"} }; - - for (my $idx = 0; $idx <= $#reqs; $idx++) { - my $class = undef; - - my $tmp2 = "const arch_register_req_t ${op}_reg_req_${inout}_${idx} = "; - - if ($reqs[$idx] eq "none") { - $tmp2 .= "{\n"; - $tmp2 .= "\tarch_register_req_type_none,\n"; - $tmp2 .= "\tNULL, /* regclass */\n"; - $tmp2 .= "\tNULL, /* limit bitset */\n"; - $tmp2 .= "\t-1, /* same pos */\n"; - $tmp2 .= "\t-1 /* different pos */\n"; - $tmp2 .= "};\n"; - - push(@obst_req, $tmp2."\n"); - push(@obst_header_t, "extern const arch_register_req_t ${op}_reg_req_${inout}_${idx};\n"); - } elsif ($reqs[$idx] =~ /^new_reg_(.*)$/) { - if (is_reg_class($1)) { - $tmp2 .= "{\n"; - $tmp2 .= "\tarch_register_req_type_should_be_different_from_all,\n"; - $tmp2 .= "\t&${arch}_reg_classes[CLASS_${arch}_$1],\n"; - $tmp2 .= "\tNULL, /* limit bitset */\n"; - $tmp2 .= "\t-1, /* same pos */\n"; - $tmp2 .= "\t-1 /* different pos */\n"; - $tmp2 .= "};\n"; - - push(@obst_req, $tmp2."\n"); - push(@obst_header_t, "extern const arch_register_req_t ${op}_reg_req_${inout}_${idx};\n"); - } else { - print STDERR "Invalid register class '$1' given in OUT requirement $idx for '$op'.\n"; - } - } elsif (is_reg_class($reqs[$idx])) { - my $class = $reqs[$idx]; - $tmp2 .= "{\n"; - $tmp2 .= "\tarch_register_req_type_normal,\n"; - $tmp2 .= "\t&${arch}_reg_classes[CLASS_${arch}_${class}],\n"; - $tmp2 .= "\tNULL, /* limit bitset */\n"; - $tmp2 .= "\t-1, /* same pos */\n"; - $tmp2 .= "\t-1 /* different pos */\n"; - $tmp2 .= "};\n"; - - push(@obst_req, $tmp2."\n"); - push(@obst_header_t, "extern const arch_register_req_t ${op}_reg_req_${inout}_${idx};\n"); - } else { - my @req_type_mask; - my ($class, $has_limit, $same_pos, $different_pos) = build_subset_class_func($n, $op, $idx, (($inout eq "in") ? 1 : 0), $reqs[$idx]); - - if (!defined($class)) { - die("Could not build subset for ".uc($inout)." requirements '$op' pos $idx ... exiting.\n"); - } - - if ($has_limit) { - push(@req_type_mask, "arch_register_req_type_limited"); - } - if (defined($same_pos)) { - push(@req_type_mask, "arch_register_req_type_should_be_same"); - } - if (defined($different_pos)) { - if ($different_pos == 666) { - push(@req_type_mask, "arch_register_req_type_should_be_different_from_all"); - undef $different_pos; - } else { - push(@req_type_mask, "arch_register_req_type_should_be_different"); - } - } - - $tmp2 .= "{\n"; - $tmp2 .= "\t".join(" | ", @req_type_mask).",\n"; - $tmp2 .= "\t&${arch}_reg_classes[CLASS_${arch}_${class}],\n"; - $tmp2 .= "\t".($has_limit ? "limit_reg_${op}_${inout}_${idx}" : "NULL").",\n"; - $tmp2 .= "\t".(defined($same_pos) ? $same_pos : "-1").",\n"; - $tmp2 .= "\t".(defined($different_pos) ? $different_pos : "-1")."\n"; - $tmp2 .= "};\n"; - - push(@obst_req, $tmp2."\n"); - push(@obst_header_t, "extern const arch_register_req_t ${op}_reg_req_${inout}_${idx};\n"); - } - } - -} - -### -# Determines whether $name is a specified register class or not. -# @return 1 if name is register class, 0 otherwise -### -sub is_reg_class { - my $name = shift; - return 1 if exists($reg_classes{"$name"}); - return 0; -} - -### -# Returns the register class for a given register. -# @return class or undef -### -sub get_reg_class { - my $reg = shift; - $reg = substr($reg, 1) if ($reg =~ /!.*/); - return $reg2class{"$reg"}{"class"} if (exists($reg2class{"$reg"})); - return undef; -} - -### -# Returns the index of a given register within it's register class. -# @return index or undef -### -sub get_reg_index { - my $reg = shift; - return $reg2class{"$reg"}{"index"} if (exists($reg2class{"$reg"})); - return undef; -} - -### -# Generates the function for a given $op and a given IN-index -# which returns a subset of possible register from a register class -# @return classname from which the subset is derived or undef and -# pos which corresponds to in/out reference position or undef -### -sub build_subset_class_func { - my $neg = undef; - my $class = undef; - my $has_limit = 0; - my $same_pos = undef; - my $different_pos = undef; - my $temp; - my @obst_init; - my @obst_limits; - my @obst_ignore; - my @limit_array; - - # build function header - my $n = shift; - my $op = shift; - my $idx = shift; - my $in = shift; - - my $outin = $in ? "out" : "in"; - my @regs = split(/ /, shift); - - my @idx_class = build_inout_idx_class($n, $op, $outin); - - # set/unset registers -CHECK_REQS: foreach (@regs) { - if (/(!)?$outin\_r(\d+)/) { - if (($1 && defined($different_pos)) || (!$1 && defined($same_pos))) { - print STDERR "Multiple in/out references of same type in one requirement not allowed.\n"; - return (undef, undef, undef, undef); - } - - if ($1) { - $different_pos = $in ? -$2 : $2 - 1; - } - else { - $same_pos = $in ? -$2 : $2 - 1; - } - - $class = $idx_class[$2 - 1]; - next CHECK_REQS; - } - elsif (/!in/) { - $class = $idx_class[0]; - return ($class, 0, undef, 666); - } - - # check for negate - if (substr($_, 0, 1) eq "!") { - if (defined($neg) && $neg == 0) { - # we have seen a positiv constraint as first one but this one is negative - # this doesn't make sense - print STDERR "Mixed positive and negative constraints for the same slot are not allowed.\n"; - return (undef, undef, undef, undef); - } - - if (!defined($neg)) { - $has_limit = 1; - } - - $_ = substr($_, 1); # skip '!' - $neg = 1; - } else { - if (defined($neg) && $neg == 1) { - # we have seen a negative constraint as first one but this one is positive - # this doesn't make sense - print STDERR "Mixed positive and negative constraints for the same slot are not allowed.\n"; - return (undef, undef, undef, undef); - } - - $has_limit = 1; - $neg = 0; - } - - # check if register belongs to one of the given classes - $temp = get_reg_class($_); - if (!defined($temp)) { - print STDERR "Unknown register '$_'!\n"; - return (undef, undef, undef, undef); - } - - # set class - if (!defined($class)) { - $class = $temp; - } elsif ($class ne $temp) { - # all registers must belong to the same class - print STDERR "Registerclass mismatch. '$_' is not member of class '$class'.\n"; - return (undef, undef, undef, undef); - } - - # calculate position inside the initializer bitfield (only 32 bits per - # element) - my $regidx = get_reg_index($_); - my $arrayp = $regidx / 32; - push(@{$limit_array[$arrayp]}, $_); - } - - # don't allow ignore regs in negative constraints - if($neg) { - my @cur_class = @{ $reg_classes{"$class"} }; - for (my $idx = 0; $idx <= $#cur_class; $idx++) { - if (defined($cur_class[$idx]{"type"}) && ($cur_class[$idx]{"type"} & 4)) { - my $reg = $cur_class[$idx]{"name"}; - my $regix = get_reg_index($reg); - my $arrayp = $regix / 32; - push(@{$limit_array[$arrayp]}, $reg); - } - } - } +print OUT< 0 ? 1 : 0); - for(my $i = 0; $i < $limitarraylen; $i++) { - my $limitarraypart = $limit_array[$i]; - if($first) { - $first = 0; - } else { - push(@obst_limit_func, ", "); - } - my $temp; - if($neg) { - $temp = "0xFFFFFFFF"; - } - foreach my $reg (@{$limitarraypart}) { - if($neg) { - $temp .= " & ~"; - } elsif(defined($temp)) { - $temp .= " | "; - } - $temp .= "BIT(REG_".uc(${reg}).")"; - } - if(defined($temp)) { - push(@obst_limit_func, "${temp}"); - } else { - push(@obst_limit_func, "0"); - } - } - push(@obst_limit_func, " };\n"); - } +/** The array of all registers in the ${arch} architecture, sorted by its global index.*/ +const arch_register_t ${arch}_registers[] = { +${regtypes_def} +}; - return ($class, $has_limit, $same_pos, $different_pos); +/** + * Initializes ${arch} register classes. + */ +void ${arch}_register_init(void) +{ +${reginit} } +EOF +close(OUT); ### # Gets the variable name for the execution unit assigned to this register.