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Message-Id: <20230217161805.236319-7-dtsen@linux.ibm.com>
Date: Fri, 17 Feb 2023 11:18:05 -0500
From: Danny Tsen <dtsen@...ux.ibm.com>
To: linux-crypto@...r.kernel.org
Cc: herbert@...dor.apana.org.au, leitao@...ian.org,
nayna@...ux.ibm.com, appro@...ptogams.org,
linux-kernel@...r.kernel.org, ltcgcw@...ux.vnet.ibm.com,
dtsen@...ibm.com, Danny Tsen <dtsen@...ux.ibm.com>
Subject: [PATCH v3 6/6] A perl script to process PowerPC assembler source.
Signed-off-by: Danny Tsen <dtsen@...ux.ibm.com>
---
arch/powerpc/crypto/ppc-xlate.pl | 229 +++++++++++++++++++++++++++++++
1 file changed, 229 insertions(+)
create mode 100644 arch/powerpc/crypto/ppc-xlate.pl
diff --git a/arch/powerpc/crypto/ppc-xlate.pl b/arch/powerpc/crypto/ppc-xlate.pl
new file mode 100644
index 000000000000..36db2ef09e5b
--- /dev/null
+++ b/arch/powerpc/crypto/ppc-xlate.pl
@@ -0,0 +1,229 @@
+#!/usr/bin/env perl
+# SPDX-License-Identifier: GPL-2.0
+
+# PowerPC assembler distiller by <appro>.
+
+my $flavour = shift;
+my $output = shift;
+open STDOUT,">$output" || die "can't open $output: $!";
+
+my %GLOBALS;
+my $dotinlocallabels=($flavour=~/linux/)?1:0;
+
+################################################################
+# directives which need special treatment on different platforms
+################################################################
+my $globl = sub {
+ my $junk = shift;
+ my $name = shift;
+ my $global = \$GLOBALS{$name};
+ my $ret;
+
+ $name =~ s|^[\.\_]||;
+
+ SWITCH: for ($flavour) {
+ /aix/ && do { $name = ".$name";
+ last;
+ };
+ /osx/ && do { $name = "_$name";
+ last;
+ };
+ /linux/
+ && do { $ret = "_GLOBAL($name)";
+ last;
+ };
+ }
+
+ $ret = ".globl $name\nalign 5\n$name:" if (!$ret);
+ $$global = $name;
+ $ret;
+};
+my $text = sub {
+ my $ret = ($flavour =~ /aix/) ? ".csect\t.text[PR],7" : ".text";
+ $ret = ".abiversion 2\n".$ret if ($flavour =~ /linux.*64le/);
+ $ret;
+};
+my $machine = sub {
+ my $junk = shift;
+ my $arch = shift;
+ if ($flavour =~ /osx/)
+ { $arch =~ s/\"//g;
+ $arch = ($flavour=~/64/) ? "ppc970-64" : "ppc970" if ($arch eq "any");
+ }
+ ".machine $arch";
+};
+my $size = sub {
+ if ($flavour =~ /linux/)
+ { shift;
+ my $name = shift; $name =~ s|^[\.\_]||;
+ my $ret = ".size $name,.-".($flavour=~/64$/?".":"").$name;
+ $ret .= "\n.size .$name,.-.$name" if ($flavour=~/64$/);
+ $ret;
+ }
+ else
+ { ""; }
+};
+my $asciz = sub {
+ shift;
+ my $line = join(",",@_);
+ if ($line =~ /^"(.*)"$/)
+ { ".byte " . join(",",unpack("C*",$1),0) . "\n.align 2"; }
+ else
+ { ""; }
+};
+my $quad = sub {
+ shift;
+ my @ret;
+ my ($hi,$lo);
+ for (@_) {
+ if (/^0x([0-9a-f]*?)([0-9a-f]{1,8})$/io)
+ { $hi=$1?"0x$1":"0"; $lo="0x$2"; }
+ elsif (/^([0-9]+)$/o)
+ { $hi=$1>>32; $lo=$1&0xffffffff; } # error-prone with 32-bit perl
+ else
+ { $hi=undef; $lo=$_; }
+
+ if (defined($hi))
+ { push(@ret,$flavour=~/le$/o?".long\t$lo,$hi":".long\t$hi,$lo"); }
+ else
+ { push(@ret,".quad $lo"); }
+ }
+ join("\n",@ret);
+};
+
+################################################################
+# simplified mnemonics not handled by at least one assembler
+################################################################
+my $cmplw = sub {
+ my $f = shift;
+ my $cr = 0; $cr = shift if ($#_>1);
+ # Some out-of-date 32-bit GNU assembler just can't handle cmplw...
+ ($flavour =~ /linux.*32/) ?
+ " .long ".sprintf "0x%x",31<<26|$cr<<23|$_[0]<<16|$_[1]<<11|64 :
+ " cmplw ".join(',',$cr,@_);
+};
+my $bdnz = sub {
+ my $f = shift;
+ my $bo = $f=~/[\+\-]/ ? 16+9 : 16; # optional "to be taken" hint
+ " bc $bo,0,".shift;
+} if ($flavour!~/linux/);
+my $bltlr = sub {
+ my $f = shift;
+ my $bo = $f=~/\-/ ? 12+2 : 12; # optional "not to be taken" hint
+ ($flavour =~ /linux/) ? # GNU as doesn't allow most recent hints
+ " .long ".sprintf "0x%x",19<<26|$bo<<21|16<<1 :
+ " bclr $bo,0";
+};
+my $bnelr = sub {
+ my $f = shift;
+ my $bo = $f=~/\-/ ? 4+2 : 4; # optional "not to be taken" hint
+ ($flavour =~ /linux/) ? # GNU as doesn't allow most recent hints
+ " .long ".sprintf "0x%x",19<<26|$bo<<21|2<<16|16<<1 :
+ " bclr $bo,2";
+};
+my $beqlr = sub {
+ my $f = shift;
+ my $bo = $f=~/-/ ? 12+2 : 12; # optional "not to be taken" hint
+ ($flavour =~ /linux/) ? # GNU as doesn't allow most recent hints
+ " .long ".sprintf "0x%X",19<<26|$bo<<21|2<<16|16<<1 :
+ " bclr $bo,2";
+};
+# GNU assembler can't handle extrdi rA,rS,16,48, or when sum of last two
+# arguments is 64, with "operand out of range" error.
+my $extrdi = sub {
+ my ($f,$ra,$rs,$n,$b) = @_;
+ $b = ($b+$n)&63; $n = 64-$n;
+ " rldicl $ra,$rs,$b,$n";
+};
+my $vmr = sub {
+ my ($f,$vx,$vy) = @_;
+ " vor $vx,$vy,$vy";
+};
+
+# Some ABIs specify vrsave, special-purpose register #256, as reserved
+# for system use.
+my $no_vrsave = ($flavour =~ /linux-ppc64le/);
+my $mtspr = sub {
+ my ($f,$idx,$ra) = @_;
+ if ($idx == 256 && $no_vrsave) {
+ " or $ra,$ra,$ra";
+ } else {
+ " mtspr $idx,$ra";
+ }
+};
+my $mfspr = sub {
+ my ($f,$rd,$idx) = @_;
+ if ($idx == 256 && $no_vrsave) {
+ " li $rd,-1";
+ } else {
+ " mfspr $rd,$idx";
+ }
+};
+
+# PowerISA 2.06 stuff
+sub vsxmem_op {
+ my ($f, $vrt, $ra, $rb, $op) = @_;
+ " .long ".sprintf "0x%X",(31<<26)|($vrt<<21)|($ra<<16)|($rb<<11)|($op*2+1);
+}
+# made-up unaligned memory reference AltiVec/VMX instructions
+my $lvx_u = sub { vsxmem_op(@_, 844); }; # lxvd2x
+my $stvx_u = sub { vsxmem_op(@_, 972); }; # stxvd2x
+my $lvdx_u = sub { vsxmem_op(@_, 588); }; # lxsdx
+my $stvdx_u = sub { vsxmem_op(@_, 716); }; # stxsdx
+my $lvx_4w = sub { vsxmem_op(@_, 780); }; # lxvw4x
+my $stvx_4w = sub { vsxmem_op(@_, 908); }; # stxvw4x
+
+# PowerISA 2.07 stuff
+sub vcrypto_op {
+ my ($f, $vrt, $vra, $vrb, $op) = @_;
+ " .long ".sprintf "0x%X",(4<<26)|($vrt<<21)|($vra<<16)|($vrb<<11)|$op;
+}
+my $vcipher = sub { vcrypto_op(@_, 1288); };
+my $vcipherlast = sub { vcrypto_op(@_, 1289); };
+my $vncipher = sub { vcrypto_op(@_, 1352); };
+my $vncipherlast= sub { vcrypto_op(@_, 1353); };
+my $vsbox = sub { vcrypto_op(@_, 0, 1480); };
+my $vshasigmad = sub { my ($st,$six)=splice(@_,-2); vcrypto_op(@_, $st<<4|$six, 1730); };
+my $vshasigmaw = sub { my ($st,$six)=splice(@_,-2); vcrypto_op(@_, $st<<4|$six, 1666); };
+my $vpmsumb = sub { vcrypto_op(@_, 1032); };
+my $vpmsumd = sub { vcrypto_op(@_, 1224); };
+my $vpmsubh = sub { vcrypto_op(@_, 1096); };
+my $vpmsumw = sub { vcrypto_op(@_, 1160); };
+my $vaddudm = sub { vcrypto_op(@_, 192); };
+my $vadduqm = sub { vcrypto_op(@_, 256); };
+
+my $mtsle = sub {
+ my ($f, $arg) = @_;
+ " .long ".sprintf "0x%X",(31<<26)|($arg<<21)|(147*2);
+};
+
+print "#include <asm/ppc_asm.h>\n" if $flavour =~ /linux/;
+
+while($line=<>) {
+
+ $line =~ s|[#!;].*$||; # get rid of asm-style comments...
+ $line =~ s|/\*.*\*/||; # ... and C-style comments...
+ $line =~ s|^\s+||; # ... and skip white spaces in beginning...
+ $line =~ s|\s+$||; # ... and at the end
+
+ {
+ $line =~ s|\b\.L(\w+)|L$1|g; # common denominator for Locallabel
+ $line =~ s|\bL(\w+)|\.L$1|g if ($dotinlocallabels);
+ }
+
+ {
+ $line =~ s|^\s*(\.?)(\w+)([\.\+\-]?)\s*||;
+ my $c = $1; $c = "\t" if ($c eq "");
+ my $mnemonic = $2;
+ my $f = $3;
+ my $opcode = eval("\$$mnemonic");
+ $line =~ s/\b(c?[rf]|v|vs)([0-9]+)\b/$2/g if ($c ne "." and $flavour !~ /osx/);
+ if (ref($opcode) eq 'CODE') { $line = &$opcode($f,split(',',$line)); }
+ elsif ($mnemonic) { $line = $c.$mnemonic.$f."\t".$line; }
+ }
+
+ print $line if ($line);
+ print "\n";
+}
+
+close STDOUT;
--
2.31.1
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