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#===-- R600GenRegisterInfo.pl - Script for generating register info files --===#
#
# The LLVM Compiler Infrastructure
#
# This file is distributed under the University of Illinois Open Source
# License. See LICENSE.TXT for details.
#
#===------------------------------------------------------------------------===#
#
# This perl script prints to stdout .td code to be used as R600RegisterInfo.td
# it also generates a file called R600HwRegInfo.include, which contains helper
# functions for determining the hw encoding of registers.
#
#===------------------------------------------------------------------------===#
use strict;
use warnings;
use constant CONST_REG_COUNT => 1024;
use constant TEMP_REG_COUNT => 128;
my $CREG_MAX = CONST_REG_COUNT - 1;
my $TREG_MAX = TEMP_REG_COUNT - 1;
print <<STRING;
class R600Reg <string name> : Register<name> {
let Namespace = "AMDGPU";
}
class R600Reg_128<string n, list<Register> subregs> : RegisterWithSubRegs<n, subregs> {
let Namespace = "AMDGPU";
let SubRegIndices = [sel_x, sel_y, sel_z, sel_w];
}
STRING
my $i;
### REG DEFS ###
my @creg_list = print_reg_defs(CONST_REG_COUNT * 4, "C");
my @treg_list = print_reg_defs(TEMP_REG_COUNT * 4, "T");
my @t128reg;
my @treg_x;
for (my $i = 0; $i < TEMP_REG_COUNT; $i++) {
my $name = "T$i\_XYZW";
print qq{def $name : R600Reg_128 <"T$i.XYZW", [T$i\_X, T$i\_Y, T$i\_Z, T$i\_W] >;\n};
$t128reg[$i] = $name;
$treg_x[$i] = "T$i\_X";
}
my $treg_string = join(",", @treg_list);
my $creg_list = join(",", @creg_list);
my $t128_string = join(",", @t128reg);
my $treg_x_string = join(",", @treg_x);
print <<STRING;
class RegSet <dag s> {
dag set = s;
}
def ZERO : R600Reg<"0.0">;
def HALF : R600Reg<"0.5">;
def ONE : R600Reg<"1.0">;
def ONE_INT : R600Reg<"1">;
def NEG_HALF : R600Reg<"-0.5">;
def NEG_ONE : R600Reg<"-1.0">;
def PV_X : R600Reg<"pv.x">;
def ALU_LITERAL_X : R600Reg<"literal.x">;
def R600_CReg32 : RegisterClass <"AMDGPU", [f32, i32], 32, (add
$creg_list)>;
def R600_TReg32 : RegisterClass <"AMDGPU", [f32, i32], 32, (add
$treg_string)>;
def R600_TReg32_X : RegisterClass <"AMDGPU", [f32, i32], 32, (add
$treg_x_string)>;
def R600_Reg32 : RegisterClass <"AMDGPU", [f32, i32], 32, (add
R600_TReg32,
R600_CReg32,
ZERO, HALF, ONE, ONE_INT, PV_X, ALU_LITERAL_X, NEG_ONE, NEG_HALF)>;
def R600_Reg128 : RegisterClass<"AMDGPU", [v4f32, v4i32], 128, (add
$t128_string)>
{
let SubRegClasses = [(R600_TReg32 sel_x, sel_y, sel_z, sel_w)];
let CopyCost = -1;
}
STRING
my %index_map;
my %chan_map;
for ($i = 0; $i <= $#creg_list; $i++) {
push(@{$index_map{get_hw_index($i)}}, $creg_list[$i]);
push(@{$chan_map{get_chan_str($i)}}, $creg_list[$i]);
}
for ($i = 0; $i <= $#treg_list; $i++) {
push(@{$index_map{get_hw_index($i)}}, $treg_list[$i]);
push(@{$chan_map{get_chan_str($i)}}, $treg_list[$i]);
}
for ($i = 0; $i <= $#t128reg; $i++) {
push(@{$index_map{$i}}, $t128reg[$i]);
push(@{$chan_map{'X'}}, $t128reg[$i]);
}
open(OUTFILE, ">", "R600HwRegInfo.include");
print OUTFILE <<STRING;
unsigned R600RegisterInfo::getHWRegIndexGen(unsigned reg) const
{
switch(reg) {
default: assert(!"Unknown register"); return 0;
STRING
foreach my $key (keys(%index_map)) {
foreach my $reg (@{$index_map{$key}}) {
print OUTFILE " case AMDGPU::$reg:\n";
}
print OUTFILE " return $key;\n\n";
}
print OUTFILE " }\n}\n\n";
print OUTFILE <<STRING;
unsigned R600RegisterInfo::getHWRegChanGen(unsigned reg) const
{
switch(reg) {
default: assert(!"Unknown register"); return 0;
STRING
foreach my $key (keys(%chan_map)) {
foreach my $reg (@{$chan_map{$key}}) {
print OUTFILE " case AMDGPU::$reg:\n";
}
my $val;
if ($key eq 'X') {
$val = 0;
} elsif ($key eq 'Y') {
$val = 1;
} elsif ($key eq 'Z') {
$val = 2;
} elsif ($key eq 'W') {
$val = 3;
} else {
die("Unknown chan value; $key");
}
print OUTFILE " return $val;\n\n";
}
print OUTFILE " }\n}\n\n";
sub print_reg_defs {
my ($count, $prefix) = @_;
my @reg_list;
for ($i = 0; $i < $count; $i++) {
my $hw_index = get_hw_index($i);
my $chan= get_chan_str($i);
my $name = "$prefix$hw_index\_$chan";
print qq{def $name : R600Reg <"$prefix$hw_index.$chan">;\n};
$reg_list[$i] = $name;
}
return @reg_list;
}
#Helper functions
sub get_hw_index {
my ($index) = @_;
return int($index / 4);
}
sub get_chan_str {
my ($index) = @_;
my $chan = $index % 4;
if ($chan == 0 ) {
return 'X';
} elsif ($chan == 1) {
return 'Y';
} elsif ($chan == 2) {
return 'Z';
} elsif ($chan == 3) {
return 'W';
} else {
die("Unknown chan value: $chan");
}
}
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