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comparison: media/libyuv/source/compare_neon.cc
media/libyuv/source/compare_neon.cc
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| 1 /* | |
| 2 * Copyright 2012 The LibYuv Project Authors. All rights reserved. | |
| 3 * | |
| 4 * Use of this source code is governed by a BSD-style license | |
| 5 * that can be found in the LICENSE file in the root of the source | |
| 6 * tree. An additional intellectual property rights grant can be found | |
| 7 * in the file PATENTS. All contributing project authors may | |
| 8 * be found in the AUTHORS file in the root of the source tree. | |
| 9 */ | |
| 10 | |
| 11 #include "libyuv/basic_types.h" | |
| 12 | |
| 13 #ifdef __cplusplus | |
| 14 namespace libyuv { | |
| 15 extern "C" { | |
| 16 #endif | |
| 17 | |
| 18 #if !defined(LIBYUV_DISABLE_NEON) && defined(__ARM_NEON__) | |
| 19 | |
| 20 uint32 SumSquareError_NEON(const uint8* src_a, const uint8* src_b, int count) { | |
| 21 volatile uint32 sse; | |
| 22 asm volatile ( | |
| 23 "vmov.u8 q8, #0 \n" | |
| 24 "vmov.u8 q10, #0 \n" | |
| 25 "vmov.u8 q9, #0 \n" | |
| 26 "vmov.u8 q11, #0 \n" | |
| 27 | |
| 28 ".p2align 2 \n" | |
| 29 "1: \n" | |
| 30 "vld1.8 {q0}, [%0]! \n" | |
| 31 "vld1.8 {q1}, [%1]! \n" | |
| 32 "subs %2, %2, #16 \n" | |
| 33 "vsubl.u8 q2, d0, d2 \n" | |
| 34 "vsubl.u8 q3, d1, d3 \n" | |
| 35 "vmlal.s16 q8, d4, d4 \n" | |
| 36 "vmlal.s16 q9, d6, d6 \n" | |
| 37 "vmlal.s16 q10, d5, d5 \n" | |
| 38 "vmlal.s16 q11, d7, d7 \n" | |
| 39 "bgt 1b \n" | |
| 40 | |
| 41 "vadd.u32 q8, q8, q9 \n" | |
| 42 "vadd.u32 q10, q10, q11 \n" | |
| 43 "vadd.u32 q11, q8, q10 \n" | |
| 44 "vpaddl.u32 q1, q11 \n" | |
| 45 "vadd.u64 d0, d2, d3 \n" | |
| 46 "vmov.32 %3, d0[0] \n" | |
| 47 : "+r"(src_a), | |
| 48 "+r"(src_b), | |
| 49 "+r"(count), | |
| 50 "=r"(sse) | |
| 51 : | |
| 52 : "memory", "cc", "q0", "q1", "q2", "q3", "q8", "q9", "q10", "q11"); | |
| 53 return sse; | |
| 54 } | |
| 55 | |
| 56 #endif // __ARM_NEON__ | |
| 57 | |
| 58 #ifdef __cplusplus | |
| 59 } // extern "C" | |
| 60 } // namespace libyuv | |
| 61 #endif |
