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Replace hand-written endian-specific loads with std.mem.readInt*() (#16431)

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And when we have the choice, favor little-endian because it's 2023.

Gives a slight performance improvement:

   md5: 552 -> 555 MiB/s
  sha1: 768 -> 786 MiB/s
sha512: 211 -> 217 MiB/s
This commit is contained in:
Frank Denis 2023-07-18 00:40:31 +02:00 committed by GitHub
parent a86f589a9f
commit a0b35249a2
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 20 additions and 33 deletions
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34
lib/std/crypto/aes/soft.zig
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@ -122,14 +122,14 @@ pub const Block = struct {
// Last round uses s-box directly and XORs to produce output.
var x: [4]u8 = undefined;
x = sbox_lookup(&sbox_encrypt, @as(u8, @truncate(s3 >> 24)), @as(u8, @truncate(s2 >> 16)), @as(u8, @truncate(s1 >> 8)), @as(u8, @truncate(s0)));
var t0 = @as(u32, x[0]) << 24 | @as(u32, x[1]) << 16 | @as(u32, x[2]) << 8 | @as(u32, x[3]);
x = sbox_lookup(&sbox_encrypt, @as(u8, @truncate(s0 >> 24)), @as(u8, @truncate(s3 >> 16)), @as(u8, @truncate(s2 >> 8)), @as(u8, @truncate(s1)));
var t1 = @as(u32, x[0]) << 24 | @as(u32, x[1]) << 16 | @as(u32, x[2]) << 8 | @as(u32, x[3]);
x = sbox_lookup(&sbox_encrypt, @as(u8, @truncate(s1 >> 24)), @as(u8, @truncate(s0 >> 16)), @as(u8, @truncate(s3 >> 8)), @as(u8, @truncate(s2)));
var t2 = @as(u32, x[0]) << 24 | @as(u32, x[1]) << 16 | @as(u32, x[2]) << 8 | @as(u32, x[3]);
x = sbox_lookup(&sbox_encrypt, @as(u8, @truncate(s2 >> 24)), @as(u8, @truncate(s1 >> 16)), @as(u8, @truncate(s0 >> 8)), @as(u8, @truncate(s3)));
var t3 = @as(u32, x[0]) << 24 | @as(u32, x[1]) << 16 | @as(u32, x[2]) << 8 | @as(u32, x[3]);
x = sbox_lookup(&sbox_encrypt, @as(u8, @truncate(s0)), @as(u8, @truncate(s1 >> 8)), @as(u8, @truncate(s2 >> 16)), @as(u8, @truncate(s3 >> 24)));
var t0 = mem.readIntLittle(u32, &x);
x = sbox_lookup(&sbox_encrypt, @as(u8, @truncate(s1)), @as(u8, @truncate(s2 >> 8)), @as(u8, @truncate(s3 >> 16)), @as(u8, @truncate(s0 >> 24)));
var t1 = mem.readIntLittle(u32, &x);
x = sbox_lookup(&sbox_encrypt, @as(u8, @truncate(s2)), @as(u8, @truncate(s3 >> 8)), @as(u8, @truncate(s0 >> 16)), @as(u8, @truncate(s1 >> 24)));
var t2 = mem.readIntLittle(u32, &x);
x = sbox_lookup(&sbox_encrypt, @as(u8, @truncate(s3)), @as(u8, @truncate(s0 >> 8)), @as(u8, @truncate(s1 >> 16)), @as(u8, @truncate(s2 >> 24)));
var t3 = mem.readIntLittle(u32, &x);
t0 ^= round_key.repr[0];
t1 ^= round_key.repr[1];
@ -218,14 +218,14 @@ pub const Block = struct {
// Last round uses s-box directly and XORs to produce output.
var x: [4]u8 = undefined;
x = sbox_lookup(&sbox_decrypt, @as(u8, @truncate(s1 >> 24)), @as(u8, @truncate(s2 >> 16)), @as(u8, @truncate(s3 >> 8)), @as(u8, @truncate(s0)));
var t0 = @as(u32, x[0]) << 24 | @as(u32, x[1]) << 16 | @as(u32, x[2]) << 8 | @as(u32, x[3]);
x = sbox_lookup(&sbox_decrypt, @as(u8, @truncate(s2 >> 24)), @as(u8, @truncate(s3 >> 16)), @as(u8, @truncate(s0 >> 8)), @as(u8, @truncate(s1)));
var t1 = @as(u32, x[0]) << 24 | @as(u32, x[1]) << 16 | @as(u32, x[2]) << 8 | @as(u32, x[3]);
x = sbox_lookup(&sbox_decrypt, @as(u8, @truncate(s3 >> 24)), @as(u8, @truncate(s0 >> 16)), @as(u8, @truncate(s1 >> 8)), @as(u8, @truncate(s2)));
var t2 = @as(u32, x[0]) << 24 | @as(u32, x[1]) << 16 | @as(u32, x[2]) << 8 | @as(u32, x[3]);
x = sbox_lookup(&sbox_decrypt, @as(u8, @truncate(s0 >> 24)), @as(u8, @truncate(s1 >> 16)), @as(u8, @truncate(s2 >> 8)), @as(u8, @truncate(s3)));
var t3 = @as(u32, x[0]) << 24 | @as(u32, x[1]) << 16 | @as(u32, x[2]) << 8 | @as(u32, x[3]);
x = sbox_lookup(&sbox_decrypt, @as(u8, @truncate(s0)), @as(u8, @truncate(s3 >> 8)), @as(u8, @truncate(s2 >> 16)), @as(u8, @truncate(s1 >> 24)));
var t0 = mem.readIntLittle(u32, &x);
x = sbox_lookup(&sbox_decrypt, @as(u8, @truncate(s1)), @as(u8, @truncate(s0 >> 8)), @as(u8, @truncate(s3 >> 16)), @as(u8, @truncate(s2 >> 24)));
var t1 = mem.readIntLittle(u32, &x);
x = sbox_lookup(&sbox_decrypt, @as(u8, @truncate(s2)), @as(u8, @truncate(s1 >> 8)), @as(u8, @truncate(s0 >> 16)), @as(u8, @truncate(s3 >> 24)));
var t2 = mem.readIntLittle(u32, &x);
x = sbox_lookup(&sbox_decrypt, @as(u8, @truncate(s3)), @as(u8, @truncate(s2 >> 8)), @as(u8, @truncate(s1 >> 16)), @as(u8, @truncate(s0 >> 24)));
var t3 = mem.readIntLittle(u32, &x);
t0 ^= round_key.repr[0];
t1 ^= round_key.repr[1];
@ -349,7 +349,7 @@ fn KeySchedule(comptime Aes: type) type {
// Apply sbox_encrypt to each byte in w.
fn func(w: u32) u32 {
const x = sbox_lookup(&sbox_key_schedule, @as(u8, @truncate(w)), @as(u8, @truncate(w >> 8)), @as(u8, @truncate(w >> 16)), @as(u8, @truncate(w >> 24)));
return @as(u32, x[3]) << 24 | @as(u32, x[2]) << 16 | @as(u32, x[1]) << 8 | @as(u32, x[0]);
return mem.readIntLittle(u32, &x);
}
}.func;

7
lib/std/crypto/md5.zig
View File

@ -121,12 +121,7 @@ pub const Md5 = struct {
var i: usize = 0;
while (i < 16) : (i += 1) {
// NOTE: Performing or's separately improves perf by ~10%
s[i] = 0;
s[i] |= @as(u32, b[i * 4 + 0]);
s[i] |= @as(u32, b[i * 4 + 1]) << 8;
s[i] |= @as(u32, b[i * 4 + 2]) << 16;
s[i] |= @as(u32, b[i * 4 + 3]) << 24;
s[i] = mem.readIntLittle(u32, b[i * 4 ..][0..4]);
}
var v: [4]u32 = [_]u32{

2
lib/std/crypto/sha1.zig
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@ -151,7 +151,7 @@ pub const Sha1 = struct {
roundParam(0, 1, 2, 3, 4, 15),
};
inline for (round0a) |r| {
s[r.i] = (@as(u32, b[r.i * 4 + 0]) << 24) | (@as(u32, b[r.i * 4 + 1]) << 16) | (@as(u32, b[r.i * 4 + 2]) << 8) | (@as(u32, b[r.i * 4 + 3]) << 0);
s[r.i] = mem.readIntBig(u32, b[r.i * 4 ..][0..4]);
v[r.e] = v[r.e] +% math.rotl(u32, v[r.a], @as(u32, 5)) +% 0x5A827999 +% s[r.i & 0xf] +% ((v[r.b] & v[r.c]) | (~v[r.b] & v[r.d]));
v[r.b] = math.rotl(u32, v[r.b], @as(u32, 30));

10
lib/std/crypto/sha2.zig
View File

@ -678,15 +678,7 @@ fn Sha2x64(comptime params: Sha2Params64) type {
var i: usize = 0;
while (i < 16) : (i += 1) {
s[i] = 0;
s[i] |= @as(u64, b[i * 8 + 0]) << 56;
s[i] |= @as(u64, b[i * 8 + 1]) << 48;
s[i] |= @as(u64, b[i * 8 + 2]) << 40;
s[i] |= @as(u64, b[i * 8 + 3]) << 32;
s[i] |= @as(u64, b[i * 8 + 4]) << 24;
s[i] |= @as(u64, b[i * 8 + 5]) << 16;
s[i] |= @as(u64, b[i * 8 + 6]) << 8;
s[i] |= @as(u64, b[i * 8 + 7]) << 0;
s[i] = mem.readIntBig(u64, b[i * 8 ..][0..8]);
}
while (i < 80) : (i += 1) {
s[i] = s[i - 16] +% s[i - 7] +%