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#! perl -slw
use strict;
use Benchmark qw[ cmpthese ];
use Math::Int128 qw[ uint128 uint128_to_hex :op ];
use Math::GMPz qw[ Rmpz_init_set_str ];
sub FNV_1_128 {
my $s = shift;
my $h = uint128( '144066263297769815596495629667062367629' );
my $p = uint128( '309485009821345068724781371' );
$h *= $p, $h ^= $_ for unpack 'C*', $s;
return $h;
}
sub FNV_1a_128 {
my $s = shift;
my $h = uint128( '144066263297769815596495629667062367629' );
my $p = uint128( '309485009821345068724781371' );
$h ^= $_, $h *= $p for unpack 'C*', $s;
return $h;
}
our $h = uint128();
our $p = uint128();
sub FNV_1_128_pa {
my $s = shift;
uint128_set($h, '144066263297769815596495629667062367629' );
uint128_set($p, '309485009821345068724781371' );
$h *= $p, $h ^= $_ for unpack 'C*', $s;
return $h;
}
sub FNV_1a_128_pa {
my $s = shift;
uint128_set($h, '144066263297769815596495629667062367629' );
uint128_set($p, '309485009821345068724781371' );
$h ^= $_, $h *= $p for unpack 'C*', $s;
return $h;
}
sub FNV_1_128_gmpz {
my $s = shift;
my $h = Math::GMPz->new( '144066263297769815596495629667062367629' );
my $p = Math::GMPz->new( '309485009821345068724781371' );
my $m = Math::GMPz->new( 1 ) << 128;
$h *= $p, $h ^= $_ for unpack 'C*', $s;
return $h % $m;
}
sub FNV_1a_128_gmpz {
my $s = shift;
my $h = Math::GMPz->new( '144066263297769815596495629667062367629' );
my $p = Math::GMPz->new( '309485009821345068724781371' );
my $m = Math::GMPz->new( 1 ) << 128;
$h ^= $_, $h *= $p for unpack 'C*', $s;
return $h % $m;
}
sub FNV_1_128_gmpz2 {
my $s = shift;
my $h = Math::GMPz->new( '144066263297769815596495629667062367629' );
my $p = Math::GMPz->new( '309485009821345068724781371' );
my $m = Math::GMPz->new( 1 ) << 128;
$h *= $p, $h ^= $_, $h %= $m for unpack 'C*', $s;
return $h;
}
sub FNV_1a_128_gmpz2 {
my $s = shift;
my $h = Math::GMPz->new( '144066263297769815596495629667062367629' );
my $p = Math::GMPz->new( '309485009821345068724781371' );
my $m = Math::GMPz->new( 1 ) << 128;
$h ^= $_, $h *= $p, $h %= $m for unpack 'C*', $s;
return $h;
}
my $mod128_mask = (Math::GMPz->new( 1 ) << 128) - 1;
sub FNV_1_128_gmpz3 {
my $s = shift;
my $h = Math::GMPz->new( '144066263297769815596495629667062367629' );
my $p = Math::GMPz->new( '309485009821345068724781371' );
$h *= $p, $h &= $mod128_mask, $h ^= $_ for unpack 'C*', $s;
return $h;
}
sub FNV_1a_128_gmpz3 {
my $s = shift;
my $h = Rmpz_init_set_str('144066263297769815596495629667062367629', 10);
my $p = Rmpz_init_set_str('309485009821345068724781371', 10);
$h ^= $_, $h *= $p, $h &= $mod128_mask for unpack 'C*', $s;
return $h;
}
sub FNV_1_128_gmpz4 {
my $s = shift;
my $h = Math::GMPz->new( '144066263297769815596495629667062367629' );
my $p = Math::GMPz->new( '309485009821345068724781371' );
$h *= $p, $h ^= $_ for unpack 'C*', $s;
return $h;
}
sub FNV_1a_128_gmpz4 {
my $s = shift;
my $h = Math::GMPz->new( '144066263297769815596495629667062367629' );
my $p = Math::GMPz->new( '309485009821345068724781371' );
$h ^= $_, $h *= $p for unpack 'C*', $s;
return $h;
}
our $text = do{ local( @ARGV, $/ ) = $0; <> };
print length $text;
cmpthese -1, {
int128 => q[
my $fnv1 = uint128_to_hex( FNV_1_128( $text ) );
my $fnv1a = uint128_to_hex( FNV_1a_128( $text ) );
],
int128_pa => q[
my $fnv1 = uint128_to_hex( FNV_1_128_pa( $text ) );
my $fnv1a = uint128_to_hex( FNV_1a_128_pa( $text ) );
],
GMPz => q[
my $fnv1 = Math::GMPz::Rmpz_get_str( FNV_1_128_gmpz( $text ), 16 );
my $fnv1a = Math::GMPz::Rmpz_get_str( FNV_1a_128_gmpz( $text ), 16 );
],
GMPz2 => q[
my $fnv1 = Math::GMPz::Rmpz_get_str( FNV_1_128_gmpz2( $text ), 16 );
my $fnv1a = Math::GMPz::Rmpz_get_str( FNV_1a_128_gmpz2( $text ), 16 );
],
GMPz3 => q[
my $fnv1 = Math::GMPz::Rmpz_get_str( FNV_1_128_gmpz3( $text ), 16 );
my $fnv1a = Math::GMPz::Rmpz_get_str( FNV_1a_128_gmpz3( $text ), 16 );
],
GMPz4 => q[
my $fnv1 = Math::GMPz::Rmpz_get_str( FNV_1_128_gmpz3( $text ), 16 );
my $fnv1a = Math::GMPz::Rmpz_get_str( FNV_1a_128_gmpz3( $text ), 16 );
],
};
__END__
C:\test>FNV128.pl
2455
Rate GMPz GMPz2 int128
GMPz 14.1/s -- -77% -95%
GMPz2 61.4/s 334% -- -78%
int128 274/s 1840% 347% --
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