| /* |
| * 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 |
