no 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;
+ warn "couldn't parse $specfile: $@" if $@;
+ warn "couldn't do $specfile: $!" unless defined $return;
+ warn "couldn't run $specfile" unless $return;
}
use strict "subs";
my $target_h_t = $target_dir."/gen_".$arch."_regalloc_if_t.h";
# helper function
-my @rt = ("arch_register_type_none",
- "arch_register_type_write_invariant",
- "arch_register_type_caller_saved",
- "arch_register_type_callee_saved",
- "arch_register_type_ignore");
+sub translate_reg_type {
+ my $t = shift;
+
+ if ($t == 0) {
+ return "arch_register_type_none";
+ }
+ else {
+ my @types;
+
+ if ($t & 1) {
+ push(@types, "arch_register_type_caller_save");
+ }
+
+ if ($t & 2) {
+ push(@types, "arch_register_type_callee_save");
+ }
+
+ if ($t & 4) {
+ push(@types, "arch_register_type_ignore");
+ }
+
+ return join(" | ", @types);
+ }
+}
# stacks for output
-my @obst_regtypes; # stack for the register type variables
+my @obst_regtypes_def; # stack for the register type variables definitions
+my @obst_regtypes_decl;# stack for the register type variables declarations
my @obst_regclasses; # stack for the register class variables
my @obst_classdef; # stack to define a name for a class index
my @obst_regdef; # stack to define a name for a register index
my @obst_limit_func; # stack for functions to return a subset of a register class
my @obst_defreq_head; # stack for prototypes of default requirement function
my @obst_header_all; # stack for some extern struct defs needed for bearch_$arch include
+my @obst_requirement_def; # stack for requirement name defines
my $numregs;
my $class_ptr;
# there is a default NONE requirement
$tmp = "/* Default NONE register requirements */\n";
-$tmp .= "const arch_register_req_t ia32_default_req_none = {\n";
-$tmp .= " arch_register_req_type_none,\n";
-$tmp .= " NULL,\n";
-$tmp .= " { NULL }\n";
+$tmp .= "const $arch\_register_req_t $arch\_default_req_none = {\n";
+$tmp .= " {\n";
+$tmp .= " arch_register_req_type_none, /* register type */\n";
+$tmp .= " NULL, /* register class */\n";
+$tmp .= " NULL, /* limit function */\n";
+$tmp .= " NULL, /* limit environment */\n";
+$tmp .= " NULL, /* node for same */\n";
+$tmp .= " NULL /* node for different */\n";
+$tmp .= " },\n";
+$tmp .= " 0, /* same pos */\n";
+$tmp .= " 0 /* different pos */\n";
$tmp .= "};\n\n";
push(@obst_req, $tmp);
+push(@obst_header_all, "extern const $arch\_register_req_t $arch\_default_req_none;\n");
-push(@obst_header_all, "extern arch_register_class_t $arch\_reg_classes[N_CLASSES];\n\n");
-push(@obst_header_all, "extern const arch_register_req_t ia32_default_req_none;\n");
+push(@obst_classdef, "enum reg_classes {\n");
-push(@obst_classdef, "#define N_CLASSES ".scalar(keys(%reg_classes))."\n");
+my $class_mode;
# 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."]";
-
- push(@obst_regtypes, "#define $numregs ".($#class + 1)."\n");
- push(@obst_regtypes, "arch_register_t ".$class_name."_regs[$numregs];\n\n");
-
- push(@obst_classdef, "#define CLASS_$class_name $class_idx\n");
- push(@obst_regclasses, "{ \"$class_name\", $numregs, ".$class_name."_regs }");
-
- # there is a default NORMAL requirement for each class
- $tmp = "/* Default NORMAL register requirements for class $class_name */\n";
- $tmp .= "const arch_register_req_t ia32_default_req_$class_name = {\n";
- $tmp .= " arch_register_req_type_normal,\n";
- $tmp .= " $class_ptr,\n";
- $tmp .= " { NULL }\n";
- $tmp .= "};\n\n";
- push(@obst_req, $tmp);
-
- push(@obst_header_all, "\nextern const arch_register_req_t ia32_default_req_$class_name;\n");
-
- my $idx = 0;
- push(@obst_reginit, " /* Init of all registers in class '$class_name' */\n\n");
- foreach (@class) {
- # For each class we build for each of it's member registers a limit function
- # which limits the class to this particular register. We also build the
- # corresponding requirement structs.
- # We need those functions to set register requirements on demand in transformation
- # esp. for Call and RegParams where we can mix int and float parameters.
-
- my $limit_func_name = $arch."_limit_".$class_name."_".$_->{"name"};
-
- # push the function prototype
- $tmp = "int $limit_func_name(const ir_node *irn, int pos, bitset_t *bs)";
- push(@obst_defreq_head, $tmp.";\n");
-
- # push the function definition
- $tmp .= " {\n";
- $tmp .= " bs = bitset_clear_all(bs);\n";
- $tmp .= " bitset_set(bs, REG_".uc($_->{"name"}).");\n"; # REGISTER to index assignment is done some lines down
- $tmp .= " return 1;\n";
- $tmp .= "}\n\n";
- push(@obst_limit_func, $tmp);
-
- # push the default requirement struct
- $tmp = "const arch_register_req_t ia32_default_req_$class_name\_".$_->{"name"}." = {\n";
- $tmp .= " arch_register_req_type_limited,\n";
- $tmp .= " $class_ptr,\n";
- $tmp .= " { $limit_func_name }\n";
- $tmp .= "};\n\n";
- push(@obst_req, $tmp);
-
- push(@obst_header_all, "extern const arch_register_req_t ia32_default_req_$class_name\_".$_->{"name"}.";\n");
-
- $reg2class{$_->{"name"}} = { "class" => $old_classname, "index" => $idx }; # remember reg to class for later use
- push(@obst_regdef, "#define REG_".uc($_->{"name"})." $idx\n");
- push(@obst_reginit, " ".$class_name."_regs[$idx].name = \"".$_->{"name"}."\";\n");
- push(@obst_reginit, " ".$class_name."_regs[$idx].reg_class = $class_ptr;\n");
- push(@obst_reginit, " ".$class_name."_regs[$idx].index = $idx;\n");
- push(@obst_reginit, " ".$class_name."_regs[$idx].type = ".$rt[$_->{"type"}].";\n\n");
- $idx++;
- }
-
- $class_idx++;
+ 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[$numregs];\n");
+
+ push(@obst_classdef, " CLASS_$class_name = $class_idx,\n");
+ push(@obst_regclasses, "{ \"$class_name\", $numregs, NULL, ".$class_name."_regs }");
+
+ # there is a default NORMAL requirement for each class
+ $tmp = "/* Default NORMAL register requirements for class $class_name */\n";
+ $tmp .= "const $arch\_register_req_t $arch\_default_req_$class_name = {\n";
+ $tmp .= " {\n";
+ $tmp .= " arch_register_req_type_normal,\n";
+ $tmp .= " $class_ptr,\n";
+ $tmp .= " NULL, /* limit function */ \n";
+ $tmp .= " NULL, /* limit environment */\n";
+ $tmp .= " NULL, /* node for same */\n";
+ $tmp .= " NULL /* node for different */\n";
+ $tmp .= " },\n";
+ $tmp .= " 0, /* same pos */\n";
+ $tmp .= " 0 /* different pos */\n";
+ $tmp .= "};\n\n";
+ push(@obst_req, $tmp);
+ push(@obst_header_all, "extern const $arch\_register_req_t $arch\_default_req_$class_name;\n");
+
+ my $idx = 0;
+ push(@obst_reginit, " /* Init of all registers in class '$class_name' */\n\n");
+ push(@obst_reginit, " /* set largest possible mode for '$class_name' */\n");
+ push(@obst_reginit, " $arch\_reg_classes[CLASS_".$class_name."].mode = $class_mode;\n\n");
+ push(@obst_regdef, "enum reg_".$class_name."_values {\n");
+ foreach (@class) {
+ # For each class we build for each of it's member registers a limit function
+ # which limits the class to this particular register. We also build the
+ # corresponding requirement structs.
+ # We need those functions to set register requirements on demand in transformation
+ # esp. for Call and RegParams where we can mix int and float parameters.
+
+ my $limit_func_name = $arch."_limit_".$class_name."_".$_->{"name"};
+
+ # push the function prototype
+ $tmp = "void $limit_func_name(void *_unused, bitset_t *bs)";
+ push(@obst_defreq_head, $tmp.";\n");
+
+ # push the function definition
+ $tmp .= " {\n";
+ $tmp .= " bs = bitset_clear_all(bs);\n";
+ $tmp .= " bitset_set(bs, REG_".uc($_->{"name"}).");\n"; # REGISTER to index assignment is done some lines down
+ $tmp .= "}\n\n";
+ push(@obst_limit_func, $tmp);
+
+ # push the default requirement struct
+ $tmp = "const $arch\_register_req_t $arch\_default_req_$class_name\_".$_->{"name"}." = {\n";
+ $tmp .= " {\n";
+ $tmp .= " arch_register_req_type_limited,\n";
+ $tmp .= " $class_ptr,\n";
+ $tmp .= " $limit_func_name,\n";
+ $tmp .= " NULL, /* limit environment */\n";
+ $tmp .= " NULL, /* node for same */\n";
+ $tmp .= " NULL /* node for different */\n";
+ $tmp .= " },\n";
+ $tmp .= " 0, /* same pos */\n";
+ $tmp .= " 0 /* different pos */\n";
+ $tmp .= "};\n\n";
+ push(@obst_req, $tmp);
+ push(@obst_header_all,"extern const $arch\_register_req_t $arch\_default_req_$class_name\_".$_->{"name"}.";\n");
+
+ $reg2class{$_->{"name"}} = { "class" => $old_classname, "index" => $idx }; # remember reg to class for later use
+ push(@obst_regdef, " REG_".uc($_->{"name"})." = $idx,\n");
+ push(@obst_reginit, " ".$class_name."_regs[$idx].name = \"".$_->{"name"}."\";\n");
+ push(@obst_reginit, " ".$class_name."_regs[$idx].reg_class = $class_ptr;\n");
+ push(@obst_reginit, " ".$class_name."_regs[$idx].index = $idx;\n");
+ push(@obst_reginit, " ".$class_name."_regs[$idx].type = ".translate_reg_type($_->{"type"}).";\n");
+ push(@obst_reginit, "\n");
+ $idx++;
+ }
+ push(@obst_regdef, " $numregs = $idx\n");
+ push(@obst_regdef, "};\n\n");
+
+ $class_idx++;
}
-push(@obst_header_all, "\n/* node specific requirements */\n");
+push(@obst_classdef, " N_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 '$op' */\n");
-
- # we need to remember the classes of the IN constraints for
- # OUT constraints like "in_s1"
- my @inidx_class;
-
- # check for argument requirements
- if (exists($n{"reg_req"}{"in"})) {
- my @in = @{ $n{"reg_req"}{"in"} };
-
- for (my $idx = 0; $idx <= $#in; $idx++) {
- my $class = undef;
-
- my $tmp2 = "const arch_register_req_t _".$op."_reg_req_in_$idx = ";
-
- $tmp = "const arch_register_req_t *".$op."_reg_req_in_$idx = ";
-
- push(@obst_header_all, "extern const arch_register_req_t *".$op."_reg_req_in_$idx;\n");
-
- if ($in[$idx] eq "none") {
- push(@inidx_class, "none");
- $tmp .= "&ia32_default_req_none;\n";
- }
- elsif (is_reg_class($in[$idx])) {
- push(@inidx_class, $in[$idx]);
- $tmp .= "&ia32_default_req_".$arch."_".$in[$idx].";\n";
- }
- else {
- $class = build_subset_class_func($op, $idx, 1, $in[$idx]);
- if (!defined $class) {
- die("Could not build subset for IN requirements '$op' pos $idx ... exiting.\n");
- }
- push(@inidx_class, $class);
- $tmp .= "&_".$op."_reg_req_in_$idx;\n";
- $tmp2 .= " {\n arch_register_req_type_limited,\n &$arch\_reg_classes[CLASS_$arch\_".$class."],\n { limit_reg_".$op."_in_".$idx." }\n};\n";
-
- $tmp = $tmp2.$tmp;
- }
-
- push(@obst_req, $tmp."\n");
- }
- }
-
- push(@obst_req, "/* OUT requirements for '$op' */\n");
-
- # check for result requirements
- if (exists($n{"reg_req"}{"out"})) {
- my @out = @{ $n{"reg_req"}{"out"} };
-
- for (my $idx = 0; $idx <= $#out; $idx++) {
- my $class = undef;
-
- my $tmp2 = "const arch_register_req_t _".$op."_reg_req_out_$idx = ";
-
- $tmp = "const arch_register_req_t *".$op."_reg_req_out_$idx = ";
-
- push(@obst_header_all, "extern const arch_register_req_t *".$op."_reg_req_out_$idx;\n");
-
- if ($out[$idx] eq "none") {
- $tmp .= "&ia32_default_req_none;\n";
- }
- elsif (is_reg_class($out[$idx])) {
- $tmp .= "&ia32_default_req_".$arch."_".$out[$idx].";\n";
- }
- elsif ($out[$idx] =~ /^(!)?in_s(\d+)/) { # this is a "should be (un)equal to register at in_X"
- $tmp .= "&_".$op."_reg_req_out_$idx;\n";
- $tmp2 .= " {\n";
- $tmp2 .= " arch_register_req_type_".($1 ? "un" : "")."equal,\n";
- $tmp2 .= " &$arch\_reg_classes[CLASS_$arch\_".$inidx_class[$2 - 1]."],\n";
- $tmp2 .= " { ".($2 - 1)." }\n};\n";
-
- $tmp = $tmp2.$tmp
- }
- else {
- $class = build_subset_class_func($op, $idx, 0, $out[$idx]);
- if (!defined $class) {
- die("Could not build subset for OUT requirements '$op' pos $idx ... exiting.\n");
- }
- $tmp .= "&_".$op."_reg_req_out_$idx;\n";
- $tmp2 .= " {\n arch_register_req_type_limited,\n &$arch\_reg_classes[CLASS_$arch\_".$class."],\n { limit_reg_".$op."_out_".$idx." }\n};\n";
-
- $tmp = $tmp2.$tmp
- }
-
- push(@obst_req, $tmp."\n");
- }
- }
+ 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, $op, "in");
+ }
+
+ push(@obst_req, "/* OUT requirements for '$op' */\n");
+ # check for result requirements
+ if (exists($n{"reg_req"}{"out"})) {
+ generate_requirements(\%n, $op, "out");
+ }
}
* date: $creation_time
*/
-#include "../bearch.h"
-
EOF
-print OUT @obst_regdef, "\n";
-
-print OUT @obst_classdef, "\n";
-
-print OUT @obst_regtypes, "\n";
-
-print OUT @obst_defreq_head, "\n";
-
-print OUT "void ".$arch."_register_init(void);\n\n";
+print OUT @obst_requirement_def;
print OUT "\n#endif /* _GEN_$tmp\_REGALLOC_IF_T_H_ */\n";
* date: $creation_time
*/
-#include "gen_$arch\_regalloc_if_t.h"
+#include "../bearch.h"
+#include "$arch\_nodes_attr.h"
EOF
-print OUT @obst_header_all;
+print OUT @obst_regdef, "\n";
+
+print OUT @obst_classdef, "\n";
+
+print OUT @obst_regtypes_decl, "\n";
+
+print OUT "extern arch_register_class_t $arch\_reg_classes[N_CLASSES];\n\n";
+
+print OUT "void ".$arch."_register_init(void *isa_ptr);\n\n";
+
+print OUT @obst_header_all, "\n";
+
+print OUT @obst_defreq_head, "\n";
print OUT "\n#endif /* _GEN_$tmp\_REGALLOC_IF_H_ */\n";
* date: $creation_time
*/
-#include "gen_$arch\_regalloc_if_t.h"
+#include "gen_$arch\_regalloc_if.h"
+#include "bearch_$arch\_t.h" /* we need this to put the caller saved registers into the isa set */
+#include "$arch\_map_regs.h"
+#include "irmode.h"
EOF
print OUT "arch_register_class_t $arch\_reg_classes[] = {\n ".join(",\n ", @obst_regclasses)."\n};\n\n";
-print OUT "void ".$arch."_register_init(void) {\n";
+print OUT @obst_regtypes_def, "\n";
+
+print OUT "void ".$arch."_register_init(void *isa_ptr) {\n";
print OUT @obst_reginit;
print OUT "}\n\n";
print OUT @obst_limit_func;
+
print OUT @obst_req;
close(OUT);
+###
+# Remember the register class for each index in the given requirements.
+# We need this information for requirements like "in_sX" or "out_dX"
+# @return array of classes corresponding to the requirement for each index
+###
+sub build_inout_idx_class {
+ my $n = shift;
+ my $op = shift;
+ my $inout = shift;
+ my @idx_class;
+
+ if (exists($n->{"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+/) {
+ $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 = ";
+ my $tmp = "#define ".$op."_reg_req_$inout\_$idx ";
+
+ if ($reqs[$idx] eq "none") {
+ $tmp .= "&$arch\_default_req_none\n";
+ }
+ elsif ($reqs[$idx] =~ /^new_reg_(.*)$/) {
+ if (is_reg_class($1)) {
+ $tmp .= "&_".$op."_reg_req_$inout\_$idx\n";
+ $tmp2 .= "{\n";
+ $tmp2 .= " {\n";
+ $tmp2 .= " arch_register_req_type_should_be_different_from_all,\n";
+ $tmp2 .= " &$arch\_reg_classes[CLASS_$arch\_".$1."],\n";
+ $tmp2 .= " NULL, /* limit function */\n";
+ $tmp2 .= " NULL, /* limit environment */\n";
+ $tmp2 .= " NULL, /* same node */\n";
+ $tmp2 .= " NULL /* different node */\n";
+ $tmp2 .= " },\n";
+ $tmp2 .= " 0,\n";
+ $tmp2 .= " 0\n";
+ $tmp2 .= "};\n";
+
+ push(@obst_req, $tmp2."\n");
+ push(@obst_header_all, "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])) {
+ $tmp .= "&$arch\_default_req_".$arch."_".$reqs[$idx]."\n";
+ }
+ else {
+ my @req_type_mask;
+ my ($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)) {
+ push(@req_type_mask, "arch_register_req_type_should_be_different");
+ }
+
+ $tmp .= "&_".$op."_reg_req_$inout\_$idx\n";
+ $tmp2 .= "{\n";
+ $tmp2 .= " {\n";
+ $tmp2 .= " ".join(" | ", @req_type_mask).",\n";
+ $tmp2 .= " &$arch\_reg_classes[CLASS_$arch\_".$class."],\n";
+ $tmp2 .= " ".($has_limit ? "limit_reg_".$op."_$inout\_".$idx : "NULL").",\n";
+ $tmp2 .= " NULL, /* limit environment */\n";
+ $tmp2 .= " NULL, /* same node */\n";
+ $tmp2 .= " NULL /* different node */\n";
+ $tmp2 .= " },\n";
+ $tmp2 .= " ".(defined($same_pos) ? $same_pos : "0").",\n";
+ $tmp2 .= " ".(defined($different_pos) ? $different_pos : "0")."\n";
+ $tmp2 .= "};\n";
+
+ push(@obst_req, $tmp2."\n");
+ push(@obst_header_all, "extern const $arch\_register_req_t _".$op."_reg_req_$inout\_$idx;\n");
+ }
+
+ push(@obst_requirement_def, $tmp);
+ }
+
+}
###
# 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;
+ my $name = shift;
+ return 1 if exists($reg_classes{"$name"});
+ return 0;
}
###
# @return class or undef
###
sub get_reg_class {
- my $reg = shift;
- return $reg2class{"$reg"}{"class"} if (exists($reg2class{"$reg"}));
- return undef;
+ my $reg = shift;
+ $reg = substr($reg, 1) if ($reg =~ /!.*/);
+ return $reg2class{"$reg"}{"class"} if (exists($reg2class{"$reg"}));
+ return undef;
}
###
# @return index or undef
###
sub get_reg_index {
- my $reg = shift;
- return $reg2class{"$reg"}{"index"} if (exists($reg2class{"$reg"}));
- return undef;
+ 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
+# @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 = "";
- my $temp;
-
- # build function header
- my $op = shift;
- my $idx = shift;
- my $in = shift;
- push(@obst_limit_func, "/* limit the possible registers for ".($in ? "IN" : "OUT")." $idx at op $op */\n");
- push(@obst_limit_func, "int limit_reg_".$op."_".($in ? "in" : "out")."_".$idx."(const ir_node *irn, int pos, bitset_t *bs) {\n");
-
- my @regs = split(/ /, shift);
-
- # set/unset registers
- foreach (@regs) {
- # check for negate
-
- if (substr($_, 0, 1) eq "!") {
- if (defined($neg) && $neg == 0) {
- # we have seen a positiv constraint as first one but this one is negative
- # this doesn't make sense
- print STDERR "Mixed positive and negative constraints for the same slot are not allowed.\n";
- return undef;
- }
-
- if (!defined($neg)) {
- push(@obst_limit_func, " bs = bitset_set_all(bs); /* allow all register (negative constraints given) */\n");
- }
-
- $_ = substr($_, 1); # skip '!'
- $neg = 1;
- }
- else {
- if (defined($neg) && $neg == 1) {
- # we have seen a negative constraint as first one but this one is positive
- # this doesn't make sense
- print STDERR "Mixed positive and negative constraints for the same slot are not allowed.\n";
- return undef;
- }
-
- if (!defined($neg)) {
- push(@obst_limit_func, " bs = bitset_clear_all(bs); /* disallow all register (positive constraints given) */\n");
- }
- $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;
- }
-
- # set class
- if (!$class) {
- $class = $temp;
- }
- elsif ($class ne $temp) {
- # all registers must belong to the same class
- print STDERR "Registerclass mismatch. '$_' is not member of class '$class'.\n";
- return undef;
- }
-
- if ($neg == 1) {
- push(@obst_limit_func, " bitset_clear(bs, ".get_reg_index($_)."); /* disallow $_ */\n");
- }
- else {
- push(@obst_limit_func, " bitset_set(bs, ".get_reg_index($_)."); /* allow $_ */\n");
- }
- }
-
- push(@obst_limit_func, "\n return ".($neg ? scalar(@{ $reg_classes{"$class"} }) - scalar(@regs) : scalar(@regs)).";\n");
- push(@obst_limit_func, "}\n\n");
-
- return $class;
+ my $neg = undef;
+ my $class = undef;
+ my $has_limit = 0;
+ my $same_pos = undef;
+ my $different_pos = undef;
+ my $temp;
+ my @temp_obst;
+
+
+ # 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[$2 - 1];
+ next CHECK_REQS;
+ }
+
+ # check for negate
+ if (substr($_, 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;
+ push(@temp_obst, " bs = bitset_set_all(bs); /* allow all register (negative constraints given) */\n");
+ }
+
+ $_ = substr($_, 1); # skip '!'
+ $neg = 1;
+ }
+ else {
+ if (defined($neg) && $neg == 1) {
+ # we have seen a negative constraint as first one but this one is positive
+ # this doesn't make sense
+ print STDERR "Mixed positive and negative constraints for the same slot are not allowed.\n";
+ return (undef, undef, undef, undef);
+ }
+
+ if (!defined($neg)) {
+ $has_limit = 1;
+ push(@temp_obst, " bs = bitset_clear_all(bs); /* disallow all register (positive constraints given) */\n");
+ }
+ $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 '$class'.\n";
+ return (undef, undef, undef, undef);
+ }
+
+ if ($neg == 1) {
+ $has_limit = 1;
+ push(@temp_obst, " bitset_clear(bs, ".get_reg_index($_)."); /* disallow $_ */\n");
+ }
+ else {
+ $has_limit = 1;
+ push(@temp_obst, " bitset_set(bs, ".get_reg_index($_)."); /* allow $_ */\n");
+ }
+ }
+
+ my @cur_class = @{ $reg_classes{"$class"} };
+ for (my $idx = 0; $idx <= $#cur_class; $idx++) {
+ if (defined($cur_class[$idx]{"type"}) && ($cur_class[$idx]{"type"} & 4)) {
+ push(@temp_obst, " bitset_clear(bs, ".get_reg_index($cur_class[$idx]{"name"}).");");
+ push(@temp_obst, " /* disallow ignore reg ".$cur_class[$idx]{"name"}." */\n");
+ }
+ }
+
+ if ($has_limit == 1) {
+ push(@obst_header_all, "void limit_reg_".$op."_".($in ? "in" : "out")."_".$idx."(void *_unused, bitset_t *bs);\n");
+
+ push(@obst_limit_func, "/* limit the possible registers for ".($in ? "IN" : "OUT")." $idx at op $op */\n");
+ push(@obst_limit_func, "void limit_reg_".$op."_".($in ? "in" : "out")."_".$idx."(void *_unused, bitset_t *bs) {\n");
+ push(@obst_limit_func, @temp_obst);
+ push(@obst_limit_func, "}\n\n");
+ }
+
+ return ($class, $has_limit, $same_pos, $different_pos);
}
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