ref: 1b9c527c6269bd5ef8eae9dd08183509e69c9cd8
dir: /third_party/libyuv/source/compare_gcc.cc/
/*
* Copyright 2012 The LibYuv Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "libyuv/basic_types.h"
#include "libyuv/compare_row.h"
#include "libyuv/row.h"
#ifdef __cplusplus
namespace libyuv {
extern "C" {
#endif
// This module is for GCC x86 and x64.
#if !defined(LIBYUV_DISABLE_X86) && \
(defined(__x86_64__) || (defined(__i386__) && !defined(_MSC_VER)))
#if defined(__x86_64__)
uint32_t HammingDistance_SSE42(const uint8_t* src_a,
const uint8_t* src_b,
int count) {
uint64_t diff = 0u;
asm volatile(
"xor %3,%3 \n"
"xor %%r8,%%r8 \n"
"xor %%r9,%%r9 \n"
"xor %%r10,%%r10 \n"
// Process 32 bytes per loop.
LABELALIGN
"1: \n"
"mov (%0),%%rcx \n"
"mov 0x8(%0),%%rdx \n"
"xor (%1),%%rcx \n"
"xor 0x8(%1),%%rdx \n"
"popcnt %%rcx,%%rcx \n"
"popcnt %%rdx,%%rdx \n"
"mov 0x10(%0),%%rsi \n"
"mov 0x18(%0),%%rdi \n"
"xor 0x10(%1),%%rsi \n"
"xor 0x18(%1),%%rdi \n"
"popcnt %%rsi,%%rsi \n"
"popcnt %%rdi,%%rdi \n"
"add $0x20,%0 \n"
"add $0x20,%1 \n"
"add %%rcx,%3 \n"
"add %%rdx,%%r8 \n"
"add %%rsi,%%r9 \n"
"add %%rdi,%%r10 \n"
"sub $0x20,%2 \n"
"jg 1b \n"
"add %%r8, %3 \n"
"add %%r9, %3 \n"
"add %%r10, %3 \n"
: "+r"(src_a), // %0
"+r"(src_b), // %1
"+r"(count), // %2
"=r"(diff) // %3
:
: "memory", "cc", "rcx", "rdx", "rsi", "rdi", "r8", "r9", "r10");
return static_cast<uint32_t>(diff);
}
#else
uint32_t HammingDistance_SSE42(const uint8_t* src_a,
const uint8_t* src_b,
int count) {
uint32_t diff = 0u;
asm volatile(
// Process 16 bytes per loop.
LABELALIGN
"1: \n"
"mov (%0),%%ecx \n"
"mov 0x4(%0),%%edx \n"
"xor (%1),%%ecx \n"
"xor 0x4(%1),%%edx \n"
"popcnt %%ecx,%%ecx \n"
"add %%ecx,%3 \n"
"popcnt %%edx,%%edx \n"
"add %%edx,%3 \n"
"mov 0x8(%0),%%ecx \n"
"mov 0xc(%0),%%edx \n"
"xor 0x8(%1),%%ecx \n"
"xor 0xc(%1),%%edx \n"
"popcnt %%ecx,%%ecx \n"
"add %%ecx,%3 \n"
"popcnt %%edx,%%edx \n"
"add %%edx,%3 \n"
"add $0x10,%0 \n"
"add $0x10,%1 \n"
"sub $0x10,%2 \n"
"jg 1b \n"
: "+r"(src_a), // %0
"+r"(src_b), // %1
"+r"(count), // %2
"+r"(diff) // %3
:
: "memory", "cc", "ecx", "edx");
return diff;
}
#endif
static const vec8 kNibbleMask = {15, 15, 15, 15, 15, 15, 15, 15,
15, 15, 15, 15, 15, 15, 15, 15};
static const vec8 kBitCount = {0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4};
uint32_t HammingDistance_SSSE3(const uint8_t* src_a,
const uint8_t* src_b,
int count) {
uint32_t diff = 0u;
asm volatile(
"movdqa %4,%%xmm2 \n"
"movdqa %5,%%xmm3 \n"
"pxor %%xmm0,%%xmm0 \n"
"pxor %%xmm1,%%xmm1 \n"
"sub %0,%1 \n"
LABELALIGN
"1: \n"
"movdqa (%0),%%xmm4 \n"
"movdqa 0x10(%0), %%xmm5 \n"
"pxor (%0,%1), %%xmm4 \n"
"movdqa %%xmm4,%%xmm6 \n"
"pand %%xmm2,%%xmm6 \n"
"psrlw $0x4,%%xmm4 \n"
"movdqa %%xmm3,%%xmm7 \n"
"pshufb %%xmm6,%%xmm7 \n"
"pand %%xmm2,%%xmm4 \n"
"movdqa %%xmm3,%%xmm6 \n"
"pshufb %%xmm4,%%xmm6 \n"
"paddb %%xmm7,%%xmm6 \n"
"pxor 0x10(%0,%1),%%xmm5 \n"
"add $0x20,%0 \n"
"movdqa %%xmm5,%%xmm4 \n"
"pand %%xmm2,%%xmm5 \n"
"psrlw $0x4,%%xmm4 \n"
"movdqa %%xmm3,%%xmm7 \n"
"pshufb %%xmm5,%%xmm7 \n"
"pand %%xmm2,%%xmm4 \n"
"movdqa %%xmm3,%%xmm5 \n"
"pshufb %%xmm4,%%xmm5 \n"
"paddb %%xmm7,%%xmm5 \n"
"paddb %%xmm5,%%xmm6 \n"
"psadbw %%xmm1,%%xmm6 \n"
"paddd %%xmm6,%%xmm0 \n"
"sub $0x20,%2 \n"
"jg 1b \n"
"pshufd $0xaa,%%xmm0,%%xmm1 \n"
"paddd %%xmm1,%%xmm0 \n"
"movd %%xmm0, %3 \n"
: "+r"(src_a), // %0
"+r"(src_b), // %1
"+r"(count), // %2
"=r"(diff) // %3
: "m"(kNibbleMask), // %4
"m"(kBitCount) // %5
: "memory", "cc", "xmm0", "xmm1", "xmm2", "xmm3", "xmm4", "xmm5", "xmm6",
"xmm7");
return diff;
}
#ifdef HAS_HAMMINGDISTANCE_AVX2
uint32_t HammingDistance_AVX2(const uint8_t* src_a,
const uint8_t* src_b,
int count) {
uint32_t diff = 0u;
asm volatile(
"vbroadcastf128 %4,%%ymm2 \n"
"vbroadcastf128 %5,%%ymm3 \n"
"vpxor %%ymm0,%%ymm0,%%ymm0 \n"
"vpxor %%ymm1,%%ymm1,%%ymm1 \n"
"sub %0,%1 \n"
LABELALIGN
"1: \n"
"vmovdqa (%0),%%ymm4 \n"
"vmovdqa 0x20(%0), %%ymm5 \n"
"vpxor (%0,%1), %%ymm4, %%ymm4 \n"
"vpand %%ymm2,%%ymm4,%%ymm6 \n"
"vpsrlw $0x4,%%ymm4,%%ymm4 \n"
"vpshufb %%ymm6,%%ymm3,%%ymm6 \n"
"vpand %%ymm2,%%ymm4,%%ymm4 \n"
"vpshufb %%ymm4,%%ymm3,%%ymm4 \n"
"vpaddb %%ymm4,%%ymm6,%%ymm6 \n"
"vpxor 0x20(%0,%1),%%ymm5,%%ymm4 \n"
"add $0x40,%0 \n"
"vpand %%ymm2,%%ymm4,%%ymm5 \n"
"vpsrlw $0x4,%%ymm4,%%ymm4 \n"
"vpshufb %%ymm5,%%ymm3,%%ymm5 \n"
"vpand %%ymm2,%%ymm4,%%ymm4 \n"
"vpshufb %%ymm4,%%ymm3,%%ymm4 \n"
"vpaddb %%ymm5,%%ymm4,%%ymm4 \n"
"vpaddb %%ymm6,%%ymm4,%%ymm4 \n"
"vpsadbw %%ymm1,%%ymm4,%%ymm4 \n"
"vpaddd %%ymm0,%%ymm4,%%ymm0 \n"
"sub $0x40,%2 \n"
"jg 1b \n"
"vpermq $0xb1,%%ymm0,%%ymm1 \n"
"vpaddd %%ymm1,%%ymm0,%%ymm0 \n"
"vpermq $0xaa,%%ymm0,%%ymm1 \n"
"vpaddd %%ymm1,%%ymm0,%%ymm0 \n"
"vmovd %%xmm0, %3 \n"
"vzeroupper \n"
: "+r"(src_a), // %0
"+r"(src_b), // %1
"+r"(count), // %2
"=r"(diff) // %3
: "m"(kNibbleMask), // %4
"m"(kBitCount) // %5
: "memory", "cc", "xmm0", "xmm1", "xmm2", "xmm3", "xmm4", "xmm5", "xmm6");
return diff;
}
#endif // HAS_HAMMINGDISTANCE_AVX2
uint32_t SumSquareError_SSE2(const uint8_t* src_a,
const uint8_t* src_b,
int count) {
uint32_t sse;
asm volatile(
"pxor %%xmm0,%%xmm0 \n"
"pxor %%xmm5,%%xmm5 \n"
LABELALIGN
"1: \n"
"movdqu (%0),%%xmm1 \n"
"lea 0x10(%0),%0 \n"
"movdqu (%1),%%xmm2 \n"
"lea 0x10(%1),%1 \n"
"movdqa %%xmm1,%%xmm3 \n"
"psubusb %%xmm2,%%xmm1 \n"
"psubusb %%xmm3,%%xmm2 \n"
"por %%xmm2,%%xmm1 \n"
"movdqa %%xmm1,%%xmm2 \n"
"punpcklbw %%xmm5,%%xmm1 \n"
"punpckhbw %%xmm5,%%xmm2 \n"
"pmaddwd %%xmm1,%%xmm1 \n"
"pmaddwd %%xmm2,%%xmm2 \n"
"paddd %%xmm1,%%xmm0 \n"
"paddd %%xmm2,%%xmm0 \n"
"sub $0x10,%2 \n"
"jg 1b \n"
"pshufd $0xee,%%xmm0,%%xmm1 \n"
"paddd %%xmm1,%%xmm0 \n"
"pshufd $0x1,%%xmm0,%%xmm1 \n"
"paddd %%xmm1,%%xmm0 \n"
"movd %%xmm0,%3 \n"
: "+r"(src_a), // %0
"+r"(src_b), // %1
"+r"(count), // %2
"=g"(sse) // %3
::"memory",
"cc", "xmm0", "xmm1", "xmm2", "xmm3", "xmm5");
return sse;
}
static const uvec32 kHash16x33 = {0x92d9e201, 0, 0, 0}; // 33 ^ 16
static const uvec32 kHashMul0 = {
0x0c3525e1, // 33 ^ 15
0xa3476dc1, // 33 ^ 14
0x3b4039a1, // 33 ^ 13
0x4f5f0981, // 33 ^ 12
};
static const uvec32 kHashMul1 = {
0x30f35d61, // 33 ^ 11
0x855cb541, // 33 ^ 10
0x040a9121, // 33 ^ 9
0x747c7101, // 33 ^ 8
};
static const uvec32 kHashMul2 = {
0xec41d4e1, // 33 ^ 7
0x4cfa3cc1, // 33 ^ 6
0x025528a1, // 33 ^ 5
0x00121881, // 33 ^ 4
};
static const uvec32 kHashMul3 = {
0x00008c61, // 33 ^ 3
0x00000441, // 33 ^ 2
0x00000021, // 33 ^ 1
0x00000001, // 33 ^ 0
};
uint32_t HashDjb2_SSE41(const uint8_t* src, int count, uint32_t seed) {
uint32_t hash;
asm volatile(
"movd %2,%%xmm0 \n"
"pxor %%xmm7,%%xmm7 \n"
"movdqa %4,%%xmm6 \n"
LABELALIGN
"1: \n"
"movdqu (%0),%%xmm1 \n"
"lea 0x10(%0),%0 \n"
"pmulld %%xmm6,%%xmm0 \n"
"movdqa %5,%%xmm5 \n"
"movdqa %%xmm1,%%xmm2 \n"
"punpcklbw %%xmm7,%%xmm2 \n"
"movdqa %%xmm2,%%xmm3 \n"
"punpcklwd %%xmm7,%%xmm3 \n"
"pmulld %%xmm5,%%xmm3 \n"
"movdqa %6,%%xmm5 \n"
"movdqa %%xmm2,%%xmm4 \n"
"punpckhwd %%xmm7,%%xmm4 \n"
"pmulld %%xmm5,%%xmm4 \n"
"movdqa %7,%%xmm5 \n"
"punpckhbw %%xmm7,%%xmm1 \n"
"movdqa %%xmm1,%%xmm2 \n"
"punpcklwd %%xmm7,%%xmm2 \n"
"pmulld %%xmm5,%%xmm2 \n"
"movdqa %8,%%xmm5 \n"
"punpckhwd %%xmm7,%%xmm1 \n"
"pmulld %%xmm5,%%xmm1 \n"
"paddd %%xmm4,%%xmm3 \n"
"paddd %%xmm2,%%xmm1 \n"
"paddd %%xmm3,%%xmm1 \n"
"pshufd $0xe,%%xmm1,%%xmm2 \n"
"paddd %%xmm2,%%xmm1 \n"
"pshufd $0x1,%%xmm1,%%xmm2 \n"
"paddd %%xmm2,%%xmm1 \n"
"paddd %%xmm1,%%xmm0 \n"
"sub $0x10,%1 \n"
"jg 1b \n"
"movd %%xmm0,%3 \n"
: "+r"(src), // %0
"+r"(count), // %1
"+rm"(seed), // %2
"=g"(hash) // %3
: "m"(kHash16x33), // %4
"m"(kHashMul0), // %5
"m"(kHashMul1), // %6
"m"(kHashMul2), // %7
"m"(kHashMul3) // %8
: "memory", "cc", "xmm0", "xmm1", "xmm2", "xmm3", "xmm4", "xmm5", "xmm6",
"xmm7");
return hash;
}
#endif // defined(__x86_64__) || (defined(__i386__) && !defined(__pic__)))
#ifdef __cplusplus
} // extern "C"
} // namespace libyuv
#endif