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gcc/libgo/runtime/aeshash.c
eric fang 677ead3b34 runtime: use 64 bits of hash seed on arm64 
This is the same issue as #33960, but on gofrontend.

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/220297
2020-04-15 14:24:33 -07:00

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// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Hash code using AES intrinsics.
#include "runtime.h"
uintptr aeshashbody(void*, uintptr, uintptr, Slice)
__asm__(GOSYM_PREFIX "runtime.aeshashbody");
uintptr aeshashbody(void*, uintptr, uintptr, Slice)
__attribute__((no_split_stack));
#if (defined(__i386__) || defined(__x86_64__)) && defined(HAVE_AS_X86_AES)
#include <emmintrin.h>
#include <tmmintrin.h>
#include <wmmintrin.h>
// Force appropriate CPU level. We won't call here unless the CPU
// supports it.
#pragma GCC target("ssse3", "aes")
#ifdef __x86_64__
// aeshashbody implements a hash function using AES instructions
// available in recent x86 processors. Note this is not encryption,
// just hashing.
//
// This is written to produce exactly the same results as the gc
// implementation, not because that matters, but just to ensure that
// this does something reasonable.
uintptr aeshashbody(void* p, uintptr seed, uintptr size, Slice aeskeysched) {
__m128i mseed, mseed2, mseed3, mseed4, mseed5, mseed6, mseed7, mseed8;
__m128i mval, mval2, mval3, mval4, mval5, mval6, mval7, mval8;
// Start with hash seed.
mseed = _mm_cvtsi64_si128(seed);
// Get 16 bits of length.
mseed = _mm_insert_epi16(mseed, size, 4);
// Repeat length 4 times total.
mseed = _mm_shufflehi_epi16(mseed, 0);
// Save unscrambled seed.
mseed2 = mseed;
// XOR in per-process seed.
mseed ^= _mm_loadu_si128(aeskeysched.__values);
// Scramble seed.
mseed = _mm_aesenc_si128(mseed, mseed);
if (size <= 16) {
if (size == 0) {
// Return scrambled input seed.
return _mm_cvtsi128_si64(_mm_aesenc_si128(mseed, mseed));
} else if (size < 16) {
if ((((uintptr)(p) + 16) & 0xff0) != 0) {
static const uint64 masks[32]
__attribute__ ((aligned(16))) =
{
0x0000000000000000, 0x0000000000000000,
0x00000000000000ff, 0x0000000000000000,
0x000000000000ffff, 0x0000000000000000,
0x0000000000ffffff, 0x0000000000000000,
0x00000000ffffffff, 0x0000000000000000,
0x000000ffffffffff, 0x0000000000000000,
0x0000ffffffffffff, 0x0000000000000000,
0x00ffffffffffffff, 0x0000000000000000,
0xffffffffffffffff, 0x0000000000000000,
0xffffffffffffffff, 0x00000000000000ff,
0xffffffffffffffff, 0x000000000000ffff,
0xffffffffffffffff, 0x0000000000ffffff,
0xffffffffffffffff, 0x00000000ffffffff,
0xffffffffffffffff, 0x000000ffffffffff,
0xffffffffffffffff, 0x0000ffffffffffff,
0xffffffffffffffff, 0x00ffffffffffffff
};
// 16 bytes loaded at p won't cross a page
// boundary, so we can load directly.
mval = _mm_loadu_si128(p);
mval &= *(const __m128i*)(&masks[size*2]);
} else {
static const uint64 shifts[32]
__attribute__ ((aligned(16))) =
{
0x0000000000000000, 0x0000000000000000,
0xffffffffffffff0f, 0xffffffffffffffff,
0xffffffffffff0f0e, 0xffffffffffffffff,
0xffffffffff0f0e0d, 0xffffffffffffffff,
0xffffffff0f0e0d0c, 0xffffffffffffffff,
0xffffff0f0e0d0c0b, 0xffffffffffffffff,
0xffff0f0e0d0c0b0a, 0xffffffffffffffff,
0xff0f0e0d0c0b0a09, 0xffffffffffffffff,
0x0f0e0d0c0b0a0908, 0xffffffffffffffff,
0x0e0d0c0b0a090807, 0xffffffffffffff0f,
0x0d0c0b0a09080706, 0xffffffffffff0f0e,
0x0c0b0a0908070605, 0xffffffffff0f0e0d,
0x0b0a090807060504, 0xffffffff0f0e0d0c,
0x0a09080706050403, 0xffffff0f0e0d0c0b,
0x0908070605040302, 0xffff0f0e0d0c0b0a,
0x0807060504030201, 0xff0f0e0d0c0b0a09,
};
// address ends in 1111xxxx. Might be
// up against a page boundary, so load
// ending at last byte. Then shift
// bytes down using pshufb.
mval = _mm_loadu_si128((void*)((char*)p - 16 + size));
mval = _mm_shuffle_epi8(mval, *(const __m128i*)(&shifts[size*2]));
}
} else {
mval = _mm_loadu_si128(p);
}
// XOR data with seed.
mval ^= mseed;
// Scramble combo 3 times.
mval = _mm_aesenc_si128(mval, mval);
mval = _mm_aesenc_si128(mval, mval);
mval = _mm_aesenc_si128(mval, mval);
return _mm_cvtsi128_si64(mval);
} else if (size <= 32) {
// Make second starting seed.
mseed2 ^= _mm_loadu_si128((void*)((char*)aeskeysched.__values + 16));
mseed2 = _mm_aesenc_si128(mseed2, mseed2);
// Load data to be hashed.
mval = _mm_loadu_si128(p);
mval2 = _mm_loadu_si128((void*)((char*)p + size - 16));
// XOR with seed.
mval ^= mseed;
mval2 ^= mseed2;
// Scramble 3 times.
mval = _mm_aesenc_si128(mval, mval);
mval2 = _mm_aesenc_si128(mval2, mval2);
mval = _mm_aesenc_si128(mval, mval);
mval2 = _mm_aesenc_si128(mval2, mval2);
mval = _mm_aesenc_si128(mval, mval);
mval2 = _mm_aesenc_si128(mval2, mval2);
// Combine results.
mval ^= mval2;
return _mm_cvtsi128_si64(mval);
} else if (size <= 64) {
// Make 3 more starting seeds.
mseed3 = mseed2;
mseed4 = mseed2;
mseed2 ^= _mm_loadu_si128((void*)((char*)aeskeysched.__values + 16));
mseed3 ^= _mm_loadu_si128((void*)((char*)aeskeysched.__values + 32));
mseed4 ^= _mm_loadu_si128((void*)((char*)aeskeysched.__values + 48));
mseed2 = _mm_aesenc_si128(mseed2, mseed2);
mseed3 = _mm_aesenc_si128(mseed3, mseed3);
mseed4 = _mm_aesenc_si128(mseed4, mseed4);
mval = _mm_loadu_si128(p);
mval2 = _mm_loadu_si128((void*)((char*)p + 16));
mval3 = _mm_loadu_si128((void*)((char*)p + size - 32));
mval4 = _mm_loadu_si128((void*)((char*)p + size - 16));
mval ^= mseed;
mval2 ^= mseed2;
mval3 ^= mseed3;
mval4 ^= mseed4;
mval = _mm_aesenc_si128(mval, mval);
mval2 = _mm_aesenc_si128(mval2, mval2);
mval3 = _mm_aesenc_si128(mval3, mval3);
mval4 = _mm_aesenc_si128(mval4, mval4);
mval = _mm_aesenc_si128(mval, mval);
mval2 = _mm_aesenc_si128(mval2, mval2);
mval3 = _mm_aesenc_si128(mval3, mval3);
mval4 = _mm_aesenc_si128(mval4, mval4);
mval = _mm_aesenc_si128(mval, mval);
mval2 = _mm_aesenc_si128(mval2, mval2);
mval3 = _mm_aesenc_si128(mval3, mval3);
mval4 = _mm_aesenc_si128(mval4, mval4);
mval ^= mval3;
mval2 ^= mval4;
mval ^= mval2;
return _mm_cvtsi128_si64(mval);
} else if (size <= 128) {
// Make 7 more starting seeds.
mseed3 = mseed2;
mseed4 = mseed2;
mseed5 = mseed2;
mseed6 = mseed2;
mseed7 = mseed2;
mseed8 = mseed2;
mseed2 ^= _mm_loadu_si128((void*)((char*)aeskeysched.__values + 16));
mseed3 ^= _mm_loadu_si128((void*)((char*)aeskeysched.__values + 32));
mseed4 ^= _mm_loadu_si128((void*)((char*)aeskeysched.__values + 48));
mseed5 ^= _mm_loadu_si128((void*)((char*)aeskeysched.__values + 64));
mseed6 ^= _mm_loadu_si128((void*)((char*)aeskeysched.__values + 80));
mseed7 ^= _mm_loadu_si128((void*)((char*)aeskeysched.__values + 96));
mseed8 ^= _mm_loadu_si128((void*)((char*)aeskeysched.__values + 112));
mseed2 = _mm_aesenc_si128(mseed2, mseed2);
mseed3 = _mm_aesenc_si128(mseed3, mseed3);
mseed4 = _mm_aesenc_si128(mseed4, mseed4);
mseed5 = _mm_aesenc_si128(mseed5, mseed5);
mseed6 = _mm_aesenc_si128(mseed6, mseed6);
mseed7 = _mm_aesenc_si128(mseed7, mseed7);
mseed8 = _mm_aesenc_si128(mseed8, mseed8);
// Load data.
mval = _mm_loadu_si128(p);
mval2 = _mm_loadu_si128((void*)((char*)p + 16));
mval3 = _mm_loadu_si128((void*)((char*)p + 32));
mval4 = _mm_loadu_si128((void*)((char*)p + 48));
mval5 = _mm_loadu_si128((void*)((char*)p + size - 64));
mval6 = _mm_loadu_si128((void*)((char*)p + size - 48));
mval7 = _mm_loadu_si128((void*)((char*)p + size - 32));
mval8 = _mm_loadu_si128((void*)((char*)p + size - 16));
// XOR with seed.
mval ^= mseed;
mval2 ^= mseed2;
mval3 ^= mseed3;
mval4 ^= mseed4;
mval5 ^= mseed5;
mval6 ^= mseed6;
mval7 ^= mseed7;
mval8 ^= mseed8;
// Scramble 3 times.
mval = _mm_aesenc_si128(mval, mval);
mval2 = _mm_aesenc_si128(mval2, mval2);
mval3 = _mm_aesenc_si128(mval3, mval3);
mval4 = _mm_aesenc_si128(mval4, mval4);
mval5 = _mm_aesenc_si128(mval5, mval5);
mval6 = _mm_aesenc_si128(mval6, mval6);
mval7 = _mm_aesenc_si128(mval7, mval7);
mval8 = _mm_aesenc_si128(mval8, mval8);
mval = _mm_aesenc_si128(mval, mval);
mval2 = _mm_aesenc_si128(mval2, mval2);
mval3 = _mm_aesenc_si128(mval3, mval3);
mval4 = _mm_aesenc_si128(mval4, mval4);
mval5 = _mm_aesenc_si128(mval5, mval5);
mval6 = _mm_aesenc_si128(mval6, mval6);
mval7 = _mm_aesenc_si128(mval7, mval7);
mval8 = _mm_aesenc_si128(mval8, mval8);
mval = _mm_aesenc_si128(mval, mval);
mval2 = _mm_aesenc_si128(mval2, mval2);
mval3 = _mm_aesenc_si128(mval3, mval3);
mval4 = _mm_aesenc_si128(mval4, mval4);
mval5 = _mm_aesenc_si128(mval5, mval5);
mval6 = _mm_aesenc_si128(mval6, mval6);
mval7 = _mm_aesenc_si128(mval7, mval7);
mval8 = _mm_aesenc_si128(mval8, mval8);
// Combine results.
mval ^= mval5;
mval2 ^= mval6;
mval3 ^= mval7;
mval4 ^= mval8;
mval ^= mval3;
mval2 ^= mval4;
mval ^= mval2;
return _mm_cvtsi128_si64(mval);
} else {
// Make 7 more starting seeds.
mseed3 = mseed2;
mseed4 = mseed2;
mseed5 = mseed2;
mseed6 = mseed2;
mseed7 = mseed2;
mseed8 = mseed2;
mseed2 ^= _mm_loadu_si128((void*)((char*)aeskeysched.__values + 16));
mseed3 ^= _mm_loadu_si128((void*)((char*)aeskeysched.__values + 32));
mseed4 ^= _mm_loadu_si128((void*)((char*)aeskeysched.__values + 48));
mseed5 ^= _mm_loadu_si128((void*)((char*)aeskeysched.__values + 64));
mseed6 ^= _mm_loadu_si128((void*)((char*)aeskeysched.__values + 80));
mseed7 ^= _mm_loadu_si128((void*)((char*)aeskeysched.__values + 96));
mseed8 ^= _mm_loadu_si128((void*)((char*)aeskeysched.__values + 112));
mseed2 = _mm_aesenc_si128(mseed2, mseed2);
mseed3 = _mm_aesenc_si128(mseed3, mseed3);
mseed4 = _mm_aesenc_si128(mseed4, mseed4);
mseed5 = _mm_aesenc_si128(mseed5, mseed5);
mseed6 = _mm_aesenc_si128(mseed6, mseed6);
mseed7 = _mm_aesenc_si128(mseed7, mseed7);
mseed8 = _mm_aesenc_si128(mseed8, mseed8);
// Start with last (possibly overlapping) block.
mval = _mm_loadu_si128((void*)((char*)p + size - 128));
mval2 = _mm_loadu_si128((void*)((char*)p + size - 112));
mval3 = _mm_loadu_si128((void*)((char*)p + size - 96));
mval4 = _mm_loadu_si128((void*)((char*)p + size - 80));
mval5 = _mm_loadu_si128((void*)((char*)p + size - 64));
mval6 = _mm_loadu_si128((void*)((char*)p + size - 48));
mval7 = _mm_loadu_si128((void*)((char*)p + size - 32));
mval8 = _mm_loadu_si128((void*)((char*)p + size - 16));
// XOR in seed.
mval ^= mseed;
mval2 ^= mseed2;
mval3 ^= mseed3;
mval4 ^= mseed4;
mval5 ^= mseed5;
mval6 ^= mseed6;
mval7 ^= mseed7;
mval8 ^= mseed8;
// Compute number of remaining 128-byte blocks.
size--;
size >>= 7;
do {
// Scramble state.
mval = _mm_aesenc_si128(mval, mval);
mval2 = _mm_aesenc_si128(mval2, mval2);
mval3 = _mm_aesenc_si128(mval3, mval3);
mval4 = _mm_aesenc_si128(mval4, mval4);
mval5 = _mm_aesenc_si128(mval5, mval5);
mval6 = _mm_aesenc_si128(mval6, mval6);
mval7 = _mm_aesenc_si128(mval7, mval7);
mval8 = _mm_aesenc_si128(mval8, mval8);
// Scramble state, XOR in a block.
mval = _mm_aesenc_si128(mval, _mm_loadu_si128(p));
mval2 = _mm_aesenc_si128(mval2, _mm_loadu_si128((void*)((char*)p + 16)));
mval3 = _mm_aesenc_si128(mval3, _mm_loadu_si128((void*)((char*)p + 32)));
mval4 = _mm_aesenc_si128(mval4, _mm_loadu_si128((void*)((char*)p + 48)));
mval5 = _mm_aesenc_si128(mval5, _mm_loadu_si128((void*)((char*)p + 64)));
mval6 = _mm_aesenc_si128(mval6, _mm_loadu_si128((void*)((char*)p + 80)));
mval7 = _mm_aesenc_si128(mval7, _mm_loadu_si128((void*)((char*)p + 96)));
mval8 = _mm_aesenc_si128(mval8, _mm_loadu_si128((void*)((char*)p + 112)));
p = (void*)((char*)p + 128);
} while (--size > 0);
// 3 more scrambles to finish.
mval = _mm_aesenc_si128(mval, mval);
mval2 = _mm_aesenc_si128(mval2, mval2);
mval3 = _mm_aesenc_si128(mval3, mval3);
mval4 = _mm_aesenc_si128(mval4, mval4);
mval5 = _mm_aesenc_si128(mval5, mval5);
mval6 = _mm_aesenc_si128(mval6, mval6);
mval7 = _mm_aesenc_si128(mval7, mval7);
mval8 = _mm_aesenc_si128(mval8, mval8);
mval = _mm_aesenc_si128(mval, mval);
mval2 = _mm_aesenc_si128(mval2, mval2);
mval3 = _mm_aesenc_si128(mval3, mval3);
mval4 = _mm_aesenc_si128(mval4, mval4);
mval5 = _mm_aesenc_si128(mval5, mval5);
mval6 = _mm_aesenc_si128(mval6, mval6);
mval7 = _mm_aesenc_si128(mval7, mval7);
mval8 = _mm_aesenc_si128(mval8, mval8);
mval = _mm_aesenc_si128(mval, mval);
mval2 = _mm_aesenc_si128(mval2, mval2);
mval3 = _mm_aesenc_si128(mval3, mval3);
mval4 = _mm_aesenc_si128(mval4, mval4);
mval5 = _mm_aesenc_si128(mval5, mval5);
mval6 = _mm_aesenc_si128(mval6, mval6);
mval7 = _mm_aesenc_si128(mval7, mval7);
mval8 = _mm_aesenc_si128(mval8, mval8);
mval ^= mval5;
mval2 ^= mval6;
mval3 ^= mval7;
mval4 ^= mval8;
mval ^= mval3;
mval2 ^= mval4;
mval ^= mval2;
return _mm_cvtsi128_si64(mval);
}
}
#else // !defined(__x86_64__)
// The 32-bit version of aeshashbody.
uintptr aeshashbody(void* p, uintptr seed, uintptr size, Slice aeskeysched) {
__m128i mseed, mseed2, mseed3, mseed4;
__m128i mval, mval2, mval3, mval4;
// Start with hash seed.
mseed = _mm_cvtsi32_si128(seed);
// Get 16 bits of length.
mseed = _mm_insert_epi16(mseed, size, 4);
// Replace size with its low 2 bytes repeated 4 times.
mseed = _mm_shufflehi_epi16(mseed, 0);
// Save unscrambled seed.
mseed2 = mseed;
// XOR in per-process seed.
mseed ^= _mm_loadu_si128(aeskeysched.__values);
// Scramble seed.
mseed = _mm_aesenc_si128(mseed, mseed);
if (size <= 16) {
if (size == 0) {
// Return scrambled input seed.
return _mm_cvtsi128_si32(_mm_aesenc_si128(mseed, mseed));
} else if (size < 16) {
if ((((uintptr)(p) + 16) & 0xff0) != 0) {
static const uint64 masks[32]
__attribute__ ((aligned(16))) =
{
0x0000000000000000, 0x0000000000000000,
0x00000000000000ff, 0x0000000000000000,
0x000000000000ffff, 0x0000000000000000,
0x0000000000ffffff, 0x0000000000000000,
0x00000000ffffffff, 0x0000000000000000,
0x000000ffffffffff, 0x0000000000000000,
0x0000ffffffffffff, 0x0000000000000000,
0x00ffffffffffffff, 0x0000000000000000,
0xffffffffffffffff, 0x0000000000000000,
0xffffffffffffffff, 0x00000000000000ff,
0xffffffffffffffff, 0x000000000000ffff,
0xffffffffffffffff, 0x0000000000ffffff,
0xffffffffffffffff, 0x00000000ffffffff,
0xffffffffffffffff, 0x000000ffffffffff,
0xffffffffffffffff, 0x0000ffffffffffff,
0xffffffffffffffff, 0x00ffffffffffffff
};
// 16 bytes loaded at p won't cross a page
// boundary, so we can load it directly.
mval = _mm_loadu_si128(p);
mval &= *(const __m128i*)(&masks[size*2]);
} else {
static const uint64 shifts[32]
__attribute__ ((aligned(16))) =
{
0x0000000000000000, 0x0000000000000000,
0xffffffffffffff0f, 0xffffffffffffffff,
0xffffffffffff0f0e, 0xffffffffffffffff,
0xffffffffff0f0e0d, 0xffffffffffffffff,
0xffffffff0f0e0d0c, 0xffffffffffffffff,
0xffffff0f0e0d0c0b, 0xffffffffffffffff,
0xffff0f0e0d0c0b0a, 0xffffffffffffffff,
0xff0f0e0d0c0b0a09, 0xffffffffffffffff,
0x0f0e0d0c0b0a0908, 0xffffffffffffffff,
0x0e0d0c0b0a090807, 0xffffffffffffff0f,
0x0d0c0b0a09080706, 0xffffffffffff0f0e,
0x0c0b0a0908070605, 0xffffffffff0f0e0d,
0x0b0a090807060504, 0xffffffff0f0e0d0c,
0x0a09080706050403, 0xffffff0f0e0d0c0b,
0x0908070605040302, 0xffff0f0e0d0c0b0a,
0x0807060504030201, 0xff0f0e0d0c0b0a09,
};
// address ends in 1111xxxx. Might be
// up against a page boundary, so load
// ending at last byte. Then shift
// bytes down using pshufb.
mval = _mm_loadu_si128((void*)((char*)p - 16 + size));
mval = _mm_shuffle_epi8(mval, *(const __m128i*)(&shifts[size*2]));
}
} else {
mval = _mm_loadu_si128(p);
}
// Scramble input, XOR in seed.
mval = _mm_aesenc_si128(mval, mseed);
mval = _mm_aesenc_si128(mval, mval);
mval = _mm_aesenc_si128(mval, mval);
return _mm_cvtsi128_si32(mval);
} else if (size <= 32) {
// Make second starting seed.
mseed2 ^= _mm_loadu_si128((void*)((char*)aeskeysched.__values + 16));
mseed2 = _mm_aesenc_si128(mseed2, mseed2);
// Load data to be hashed.
mval = _mm_loadu_si128(p);
mval2 = _mm_loadu_si128((void*)((char*)p + size - 16));
// Scramble 3 times.
mval = _mm_aesenc_si128(mval, mseed);
mval2 = _mm_aesenc_si128(mval2, mseed2);
mval = _mm_aesenc_si128(mval, mval);
mval2 = _mm_aesenc_si128(mval2, mval2);
mval = _mm_aesenc_si128(mval, mval);
mval2 = _mm_aesenc_si128(mval2, mval2);
// Combine results.
mval ^= mval2;
return _mm_cvtsi128_si32(mval);
} else if (size <= 64) {
// Make 3 more starting seeds.
mseed3 = mseed2;
mseed4 = mseed2;
mseed2 ^= _mm_loadu_si128((void*)((char*)aeskeysched.__values + 16));
mseed3 ^= _mm_loadu_si128((void*)((char*)aeskeysched.__values + 32));
mseed4 ^= _mm_loadu_si128((void*)((char*)aeskeysched.__values + 48));
mseed2 = _mm_aesenc_si128(mseed2, mseed2);
mseed3 = _mm_aesenc_si128(mseed3, mseed3);
mseed4 = _mm_aesenc_si128(mseed4, mseed4);
mval = _mm_loadu_si128(p);
mval2 = _mm_loadu_si128((void*)((char*)p + 16));
mval3 = _mm_loadu_si128((void*)((char*)p + size - 32));
mval4 = _mm_loadu_si128((void*)((char*)p + size - 16));
mval = _mm_aesenc_si128(mval, mseed);
mval2 = _mm_aesenc_si128(mval2, mseed2);
mval3 = _mm_aesenc_si128(mval3, mseed3);
mval4 = _mm_aesenc_si128(mval4, mseed4);
mval = _mm_aesenc_si128(mval, mval);
mval2 = _mm_aesenc_si128(mval2, mval2);
mval3 = _mm_aesenc_si128(mval3, mval3);
mval4 = _mm_aesenc_si128(mval4, mval4);
mval = _mm_aesenc_si128(mval, mval);
mval2 = _mm_aesenc_si128(mval2, mval2);
mval3 = _mm_aesenc_si128(mval3, mval3);
mval4 = _mm_aesenc_si128(mval4, mval4);
mval ^= mval3;
mval2 ^= mval4;
mval ^= mval2;
return _mm_cvtsi128_si32(mval);
} else {
// Make 3 more starting seeds.
mseed3 = mseed2;
mseed4 = mseed2;
mseed2 ^= _mm_loadu_si128((void*)((char*)aeskeysched.__values + 16));
mseed3 ^= _mm_loadu_si128((void*)((char*)aeskeysched.__values + 32));
mseed4 ^= _mm_loadu_si128((void*)((char*)aeskeysched.__values + 48));
mseed2 = _mm_aesenc_si128(mseed2, mseed2);
mseed3 = _mm_aesenc_si128(mseed3, mseed3);
mseed4 = _mm_aesenc_si128(mseed4, mseed4);
// Start with last (possibly overlapping) block.
mval = _mm_loadu_si128((void*)((char*)p + size - 64));
mval2 = _mm_loadu_si128((void*)((char*)p + size - 48));
mval3 = _mm_loadu_si128((void*)((char*)p + size - 32));
mval4 = _mm_loadu_si128((void*)((char*)p + size - 16));
// Scramble state once.
mval = _mm_aesenc_si128(mval, mseed);
mval2 = _mm_aesenc_si128(mval2, mseed2);
mval3 = _mm_aesenc_si128(mval3, mseed3);
mval4 = _mm_aesenc_si128(mval4, mseed4);
// Compute number of remaining 64-byte blocks.
size--;
size >>= 6;
do {
// Scramble state, XOR in a block.
mval = _mm_aesenc_si128(mval, _mm_loadu_si128(p));
mval2 = _mm_aesenc_si128(mval2, _mm_loadu_si128((void*)((char*)p + 16)));
mval3 = _mm_aesenc_si128(mval3, _mm_loadu_si128((void*)((char*)p + 32)));
mval4 = _mm_aesenc_si128(mval4, _mm_loadu_si128((void*)((char*)p + 48)));
// Scramble state.
mval = _mm_aesenc_si128(mval, mval);
mval2 = _mm_aesenc_si128(mval2, mval2);
mval3 = _mm_aesenc_si128(mval3, mval3);
mval4 = _mm_aesenc_si128(mval4, mval4);
p = (void*)((char*)p + 64);
} while (--size > 0);
// 2 more scrambles to finish.
mval = _mm_aesenc_si128(mval, mval);
mval2 = _mm_aesenc_si128(mval2, mval2);
mval3 = _mm_aesenc_si128(mval3, mval3);
mval4 = _mm_aesenc_si128(mval4, mval4);
mval = _mm_aesenc_si128(mval, mval);
mval2 = _mm_aesenc_si128(mval2, mval2);
mval3 = _mm_aesenc_si128(mval3, mval3);
mval4 = _mm_aesenc_si128(mval4, mval4);
mval ^= mval3;
mval2 ^= mval4;
mval ^= mval2;
return _mm_cvtsi128_si32(mval);
}
}
#endif // !defined(__x86_64__)
#elif defined(__aarch64__)
// Undefine some identifiers that we pick up from the Go runtime package that
// are used in arm_neon.h.
#undef t1
#undef tx
#undef t2
#undef t3
#undef t4
#undef t5
#include <arm_neon.h>
// Force appropriate CPU level. We won't call here unless the CPU
// supports it.
#pragma GCC target("+crypto")
// The arm64 version of aeshashbody.
uintptr aeshashbody(void* p, uintptr seed, uintptr size, Slice aeskeysched) {
uint8x16_t *pseed;
uint64x2_t vinit64;
uint8x16_t vinit;
uint8x16_t vseed, vseed2, vseed3, vseed4;
uint8x16_t vseed5, vseed6, vseed7, vseed8;
uint8x16_t vval, vval2, vval3, vval4;
uint8x16_t vval5, vval6, vval7, vval8;
uint8x16_t vvalLoop, vvalLoop2, vvalLoop3, vvalLoop4;
uint8x16_t vvalLoop5, vvalLoop6, vvalLoop7, vvalLoop8;
uint8x16x2_t avval2;
uint8x16x3_t avseed3;
pseed = (uint8x16_t*)(aeskeysched.__values);
// Combined hash seed and length.
vinit64 = vdupq_n_u64(0);
vinit64[0] = (uint64)seed;
vinit64[1] = (uint64)size;
vinit = vreinterpretq_u8_u64(vinit64);
// Mix in per-process seed.
vseed = vaeseq_u8(*pseed, vinit);
++pseed;
// Scramble seed.
vseed = vaesmcq_u8(vseed);
if (size <= 16) {
if (size == 0) {
// Return 64 bits of scrambled input seed.
return vreinterpretq_u64_u8(vseed)[0];
} else if (size < 16) {
vval = vreinterpretq_u8_u64(vdupq_n_u64(0));
if ((size & 8) != 0) {
vval = vreinterpretq_u8_u64(vld1q_lane_u64((uint64_t*)(p), vreinterpretq_u64_u8(vval), 0));
p = (void*)((uint64_t*)(p) + 1);
}
if ((size & 4) != 0) {
vval = vreinterpretq_u8_u32(vld1q_lane_u32((uint32_t*)(p), vreinterpretq_u32_u8(vval), 2));
p = (void*)((uint32_t*)(p) + 1);
}
if ((size & 2) != 0) {
vval = vreinterpretq_u8_u16(vld1q_lane_u16((uint16_t*)(p), vreinterpretq_u16_u8(vval), 6));
p = (void*)((uint16_t*)(p) + 1);
}
if ((size & 1) != 0) {
vval = vld1q_lane_u8((uint8*)(p), vval, 14);
}
} else {
vval = *(uint8x16_t*)(p);
}
vval = vaeseq_u8(vval, vseed);
vval = vaesmcq_u8(vval);
vval = vaeseq_u8(vval, vseed);
vval = vaesmcq_u8(vval);
vval = vaeseq_u8(vval, vseed);
return vreinterpretq_u64_u8(vval)[0];
} else if (size <= 32) {
// Make a second seed.
vseed2 = vaeseq_u8(*pseed, vinit);
vseed2 = vaesmcq_u8(vseed2);
vval = *(uint8x16_t*)(p);
vval2 = *(uint8x16_t*)((char*)(p) + (size - 16));
vval = vaeseq_u8(vval, vseed);
vval = vaesmcq_u8(vval);
vval2 = vaeseq_u8(vval2, vseed2);
vval2 = vaesmcq_u8(vval2);
vval = vaeseq_u8(vval, vseed);
vval = vaesmcq_u8(vval);
vval2 = vaeseq_u8(vval2, vseed2);
vval2 = vaesmcq_u8(vval2);
vval = vaeseq_u8(vval, vseed);
vval2 = vaeseq_u8(vval2, vseed2);
vval ^= vval2;
return vreinterpretq_u64_u8(vval)[0];
} else if (size <= 64) {
avseed3 = vld1q_u8_x3((uint8*)(pseed));
vseed2 = avseed3.val[0];
vseed3 = avseed3.val[1];
vseed4 = avseed3.val[2];
vseed2 = vaeseq_u8(vseed2, vinit);
vseed2 = vaesmcq_u8(vseed2);
vseed3 = vaeseq_u8(vseed3, vinit);
vseed3 = vaesmcq_u8(vseed3);
vseed4 = vaeseq_u8(vseed4, vinit);
vseed4 = vaesmcq_u8(vseed4);
avval2 = vld1q_u8_x2((uint8*)(p));
vval = avval2.val[0];
vval2 = avval2.val[1];
avval2 = vld1q_u8_x2((uint8*)(p) + (size - 32));
vval3 = avval2.val[0];
vval4 = avval2.val[1];
vval = vaeseq_u8(vval, vseed);
vval = vaesmcq_u8(vval);
vval2 = vaeseq_u8(vval2, vseed2);
vval2 = vaesmcq_u8(vval2);
vval3 = vaeseq_u8(vval3, vseed3);
vval3 = vaesmcq_u8(vval3);
vval4 = vaeseq_u8(vval4, vseed4);
vval4 = vaesmcq_u8(vval4);
vval = vaeseq_u8(vval, vseed);
vval = vaesmcq_u8(vval);
vval2 = vaeseq_u8(vval2, vseed2);
vval2 = vaesmcq_u8(vval2);
vval3 = vaeseq_u8(vval3, vseed3);
vval3 = vaesmcq_u8(vval3);
vval4 = vaeseq_u8(vval4, vseed4);
vval4 = vaesmcq_u8(vval4);
vval = vaeseq_u8(vval, vseed);
vval2 = vaeseq_u8(vval2, vseed2);
vval3 = vaeseq_u8(vval3, vseed3);
vval4 = vaeseq_u8(vval4, vseed4);
vval ^= vval3;
vval2 ^= vval4;
vval ^= vval2;
return vreinterpretq_u64_u8(vval)[0];
} else if (size <= 128) {
// For some reason vld1q_u8_x4 is missing.
avseed3 = vld1q_u8_x3((uint8*)(pseed));
vseed2 = avseed3.val[0];
vseed3 = avseed3.val[1];
vseed4 = avseed3.val[2];
avseed3 = vld1q_u8_x3((uint8*)(pseed + 3));
vseed5 = avseed3.val[0];
vseed6 = avseed3.val[1];
vseed7 = avseed3.val[2];
vseed8 = *(pseed + 6);
vseed2 = vaeseq_u8(vseed2, vinit);
vseed2 = vaesmcq_u8(vseed2);
vseed3 = vaeseq_u8(vseed3, vinit);
vseed3 = vaesmcq_u8(vseed3);
vseed4 = vaeseq_u8(vseed4, vinit);
vseed4 = vaesmcq_u8(vseed4);
vseed5 = vaeseq_u8(vseed5, vinit);
vseed5 = vaesmcq_u8(vseed5);
vseed6 = vaeseq_u8(vseed6, vinit);
vseed6 = vaesmcq_u8(vseed6);
vseed7 = vaeseq_u8(vseed7, vinit);
vseed7 = vaesmcq_u8(vseed7);
vseed8 = vaeseq_u8(vseed8, vinit);
vseed8 = vaesmcq_u8(vseed8);
avval2 = vld1q_u8_x2((uint8*)(p));
vval = avval2.val[0];
vval2 = avval2.val[1];
avval2 = vld1q_u8_x2((uint8*)(p) + 32);
vval3 = avval2.val[0];
vval4 = avval2.val[1];
avval2 = vld1q_u8_x2((uint8*)(p) + (size - 64));
vval5 = avval2.val[0];
vval6 = avval2.val[1];
avval2 = vld1q_u8_x2((uint8*)(p) + (size - 32));
vval7 = avval2.val[0];
vval8 = avval2.val[1];
vval = vaeseq_u8(vval, vseed);
vval = vaesmcq_u8(vval);
vval2 = vaeseq_u8(vval2, vseed2);
vval2 = vaesmcq_u8(vval2);
vval3 = vaeseq_u8(vval3, vseed3);
vval3 = vaesmcq_u8(vval3);
vval4 = vaeseq_u8(vval4, vseed4);
vval4 = vaesmcq_u8(vval4);
vval5 = vaeseq_u8(vval5, vseed5);
vval5 = vaesmcq_u8(vval5);
vval6 = vaeseq_u8(vval6, vseed6);
vval6 = vaesmcq_u8(vval6);
vval7 = vaeseq_u8(vval7, vseed7);
vval7 = vaesmcq_u8(vval7);
vval8 = vaeseq_u8(vval8, vseed8);
vval8 = vaesmcq_u8(vval8);
vval = vaeseq_u8(vval, vseed);
vval = vaesmcq_u8(vval);
vval2 = vaeseq_u8(vval2, vseed2);
vval2 = vaesmcq_u8(vval2);
vval3 = vaeseq_u8(vval3, vseed3);
vval3 = vaesmcq_u8(vval3);
vval4 = vaeseq_u8(vval4, vseed4);
vval4 = vaesmcq_u8(vval4);
vval5 = vaeseq_u8(vval5, vseed5);
vval5 = vaesmcq_u8(vval5);
vval6 = vaeseq_u8(vval6, vseed6);
vval6 = vaesmcq_u8(vval6);
vval7 = vaeseq_u8(vval7, vseed7);
vval7 = vaesmcq_u8(vval7);
vval8 = vaeseq_u8(vval8, vseed8);
vval8 = vaesmcq_u8(vval8);
vval = vaeseq_u8(vval, vseed);
vval2 = vaeseq_u8(vval2, vseed2);
vval3 = vaeseq_u8(vval3, vseed3);
vval4 = vaeseq_u8(vval4, vseed4);
vval5 = vaeseq_u8(vval5, vseed5);
vval6 = vaeseq_u8(vval6, vseed6);
vval7 = vaeseq_u8(vval7, vseed7);
vval8 = vaeseq_u8(vval8, vseed8);
vval ^= vval5;
vval2 ^= vval6;
vval3 ^= vval7;
vval4 ^= vval8;
vval ^= vval3;
vval2 ^= vval4;
vval ^= vval2;
return vreinterpretq_u64_u8(vval)[0];
} else {
// For some reason vld1q_u8_x4 is missing.
avseed3 = vld1q_u8_x3((uint8*)(pseed));
vseed2 = avseed3.val[0];
vseed3 = avseed3.val[1];
vseed4 = avseed3.val[2];
avseed3 = vld1q_u8_x3((uint8*)(pseed + 3));
vseed5 = avseed3.val[0];
vseed6 = avseed3.val[1];
vseed7 = avseed3.val[2];
vseed8 = *(pseed + 6);
vseed2 = vaeseq_u8(vseed2, vinit);
vseed2 = vaesmcq_u8(vseed2);
vseed3 = vaeseq_u8(vseed3, vinit);
vseed3 = vaesmcq_u8(vseed3);
vseed4 = vaeseq_u8(vseed4, vinit);
vseed4 = vaesmcq_u8(vseed4);
vseed5 = vaeseq_u8(vseed5, vinit);
vseed5 = vaesmcq_u8(vseed5);
vseed6 = vaeseq_u8(vseed6, vinit);
vseed6 = vaesmcq_u8(vseed6);
vseed7 = vaeseq_u8(vseed7, vinit);
vseed7 = vaesmcq_u8(vseed7);
vseed8 = vaeseq_u8(vseed8, vinit);
vseed8 = vaesmcq_u8(vseed8);
avval2 = vld1q_u8_x2((uint8*)(p) + (size - 128));
vval = avval2.val[0];
vval2 = avval2.val[1];
avval2 = vld1q_u8_x2((uint8*)(p) + (size - 96));
vval3 = avval2.val[0];
vval4 = avval2.val[1];
avval2 = vld1q_u8_x2((uint8*)(p) + (size - 64));
vval5 = avval2.val[0];
vval6 = avval2.val[1];
avval2 = vld1q_u8_x2((uint8*)(p) + (size - 32));
vval7 = avval2.val[0];
vval8 = avval2.val[1];
vvalLoop = vseed;
vvalLoop2 = vseed2;
vvalLoop3 = vseed3;
vvalLoop4 = vseed4;
vvalLoop5 = vseed5;
vvalLoop6 = vseed6;
vvalLoop7 = vseed7;
vvalLoop8 = vseed8;
size--;
size >>= 7;
do {
vval = vaeseq_u8(vval, vvalLoop);
vval = vaesmcq_u8(vval);
vval2 = vaeseq_u8(vval2, vvalLoop2);
vval2 = vaesmcq_u8(vval2);
vval3 = vaeseq_u8(vval3, vvalLoop3);
vval3 = vaesmcq_u8(vval3);
vval4 = vaeseq_u8(vval4, vvalLoop4);
vval4 = vaesmcq_u8(vval4);
vval5 = vaeseq_u8(vval5, vvalLoop5);
vval5 = vaesmcq_u8(vval5);
vval6 = vaeseq_u8(vval6, vvalLoop6);
vval6 = vaesmcq_u8(vval6);
vval7 = vaeseq_u8(vval7, vvalLoop7);
vval7 = vaesmcq_u8(vval7);
vval8 = vaeseq_u8(vval8, vvalLoop8);
vval8 = vaesmcq_u8(vval8);
avval2 = vld1q_u8_x2((uint8*)(p));
vvalLoop = avval2.val[0];
vvalLoop2 = avval2.val[1];
avval2 = vld1q_u8_x2((uint8*)(p) + 32);
vvalLoop3 = avval2.val[0];
vvalLoop4 = avval2.val[1];
avval2 = vld1q_u8_x2((uint8*)(p) + 64);
vvalLoop5 = avval2.val[0];
vvalLoop6 = avval2.val[1];
avval2 = vld1q_u8_x2((uint8*)(p) + 96);
vvalLoop7 = avval2.val[0];
vvalLoop8 = avval2.val[1];
p = (void *)((uint8*)(p) + 128);
vval = vaeseq_u8(vval, vvalLoop);
vval = vaesmcq_u8(vval);
vval2 = vaeseq_u8(vval2, vvalLoop2);
vval2 = vaesmcq_u8(vval2);
vval3 = vaeseq_u8(vval3, vvalLoop3);
vval3 = vaesmcq_u8(vval3);
vval4 = vaeseq_u8(vval4, vvalLoop4);
vval4 = vaesmcq_u8(vval4);
vval5 = vaeseq_u8(vval5, vvalLoop5);
vval5 = vaesmcq_u8(vval5);
vval6 = vaeseq_u8(vval6, vvalLoop6);
vval6 = vaesmcq_u8(vval6);
vval7 = vaeseq_u8(vval7, vvalLoop7);
vval7 = vaesmcq_u8(vval7);
vval8 = vaeseq_u8(vval8, vvalLoop8);
vval8 = vaesmcq_u8(vval8);
} while (--size > 0);
vval = vaeseq_u8(vval, vvalLoop);
vval = vaesmcq_u8(vval);
vval2 = vaeseq_u8(vval2, vvalLoop2);
vval2 = vaesmcq_u8(vval2);
vval3 = vaeseq_u8(vval3, vvalLoop3);
vval3 = vaesmcq_u8(vval3);
vval4 = vaeseq_u8(vval4, vvalLoop4);
vval4 = vaesmcq_u8(vval4);
vval5 = vaeseq_u8(vval5, vvalLoop5);
vval5 = vaesmcq_u8(vval5);
vval6 = vaeseq_u8(vval6, vvalLoop6);
vval6 = vaesmcq_u8(vval6);
vval7 = vaeseq_u8(vval7, vvalLoop7);
vval7 = vaesmcq_u8(vval7);
vval8 = vaeseq_u8(vval8, vvalLoop8);
vval8 = vaesmcq_u8(vval8);
vval = vaeseq_u8(vval, vvalLoop);
vval = vaesmcq_u8(vval);
vval2 = vaeseq_u8(vval2, vvalLoop2);
vval2 = vaesmcq_u8(vval2);
vval3 = vaeseq_u8(vval3, vvalLoop3);
vval3 = vaesmcq_u8(vval3);
vval4 = vaeseq_u8(vval4, vvalLoop4);
vval4 = vaesmcq_u8(vval4);
vval5 = vaeseq_u8(vval5, vvalLoop5);
vval5 = vaesmcq_u8(vval5);
vval6 = vaeseq_u8(vval6, vvalLoop6);
vval6 = vaesmcq_u8(vval6);
vval7 = vaeseq_u8(vval7, vvalLoop7);
vval7 = vaesmcq_u8(vval7);
vval8 = vaeseq_u8(vval8, vvalLoop8);
vval8 = vaesmcq_u8(vval8);
vval = vaeseq_u8(vval, vvalLoop);
vval2 = vaeseq_u8(vval2, vvalLoop2);
vval3 = vaeseq_u8(vval3, vvalLoop3);
vval4 = vaeseq_u8(vval4, vvalLoop4);
vval5 = vaeseq_u8(vval5, vvalLoop5);
vval6 = vaeseq_u8(vval6, vvalLoop6);
vval7 = vaeseq_u8(vval7, vvalLoop7);
vval8 = vaeseq_u8(vval8, vvalLoop8);
vval ^= vval5;
vval2 ^= vval6;
vval3 ^= vval7;
vval4 ^= vval8;
vval ^= vval3;
vval2 ^= vval4;
vval ^= vval2;
return vreinterpretq_u64_u8(vval)[0];
}
}
#else // (!defined(__i386__) && !defined(__x86_64__) || !defined(HAVE_AS_X86_AES)) && !defined(__aarch64__)
uintptr aeshashbody(void* p __attribute__((unused)),
uintptr seed __attribute__((unused)),
uintptr size __attribute__((unused)),
Slice aeskeysched __attribute__((unused))) {
// We should never get here on a non-x86, non-arm64 system.
runtime_throw("impossible call to aeshashbody");
}
#endif // !defined(__i386__) && !defined(__x86_64__) || !defined(HAVE_AS_X86_AES)
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