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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__)
#else // !defined(__i386__) && !defined(__x86_64__) || !defined(HAVE_AS_X86_AES)
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 system.
runtime_throw("impossible call to aeshashbody");
}
#endif // !defined(__i386__) && !defined(__x86_64__) || !defined(HAVE_AS_X86_AES)
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