| /* |
| * 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/row.h" |
| |
| #ifdef __cplusplus |
| namespace libyuv { |
| extern "C" { |
| #endif |
| |
| #if !defined(LIBYUV_DISABLE_NEON) && defined(__ARM_NEON__) && \ |
| !defined(__aarch64__) |
| |
| uint32 SumSquareError_NEON(const uint8* src_a, const uint8* src_b, int count) { |
| volatile uint32 sse; |
| asm volatile ( |
| "vmov.u8 q8, #0 \n" |
| "vmov.u8 q10, #0 \n" |
| "vmov.u8 q9, #0 \n" |
| "vmov.u8 q11, #0 \n" |
| |
| ".p2align 2 \n" |
| "1: \n" |
| MEMACCESS(0) |
| "vld1.8 {q0}, [%0]! \n" |
| MEMACCESS(1) |
| "vld1.8 {q1}, [%1]! \n" |
| "subs %2, %2, #16 \n" |
| "vsubl.u8 q2, d0, d2 \n" |
| "vsubl.u8 q3, d1, d3 \n" |
| "vmlal.s16 q8, d4, d4 \n" |
| "vmlal.s16 q9, d6, d6 \n" |
| "vmlal.s16 q10, d5, d5 \n" |
| "vmlal.s16 q11, d7, d7 \n" |
| "bgt 1b \n" |
| |
| "vadd.u32 q8, q8, q9 \n" |
| "vadd.u32 q10, q10, q11 \n" |
| "vadd.u32 q11, q8, q10 \n" |
| "vpaddl.u32 q1, q11 \n" |
| "vadd.u64 d0, d2, d3 \n" |
| "vmov.32 %3, d0[0] \n" |
| : "+r"(src_a), |
| "+r"(src_b), |
| "+r"(count), |
| "=r"(sse) |
| : |
| : "memory", "cc", "q0", "q1", "q2", "q3", "q8", "q9", "q10", "q11"); |
| return sse; |
| } |
| |
| #endif // defined(__ARM_NEON__) && !defined(__aarch64__) |
| |
| #ifdef __cplusplus |
| } // extern "C" |
| } // namespace libyuv |
| #endif |
