| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef ANDROID_AUDIO_RESAMPLER_FIR_OPS_H |
| #define ANDROID_AUDIO_RESAMPLER_FIR_OPS_H |
| |
| namespace android { |
| |
| #if defined(__arm__) && !defined(__thumb__) |
| #define USE_INLINE_ASSEMBLY (true) |
| #else |
| #define USE_INLINE_ASSEMBLY (false) |
| #endif |
| |
| #if USE_INLINE_ASSEMBLY && defined(__ARM_NEON__) |
| #define USE_NEON (true) |
| #include <arm_neon.h> |
| #else |
| #define USE_NEON (false) |
| #endif |
| |
| template<typename T, typename U> |
| struct is_same |
| { |
| static const bool value = false; |
| }; |
| |
| template<typename T> |
| struct is_same<T, T> // partial specialization |
| { |
| static const bool value = true; |
| }; |
| |
| static inline |
| int32_t mulRL(int left, int32_t in, uint32_t vRL) |
| { |
| #if USE_INLINE_ASSEMBLY |
| int32_t out; |
| if (left) { |
| asm( "smultb %[out], %[in], %[vRL] \n" |
| : [out]"=r"(out) |
| : [in]"%r"(in), [vRL]"r"(vRL) |
| : ); |
| } else { |
| asm( "smultt %[out], %[in], %[vRL] \n" |
| : [out]"=r"(out) |
| : [in]"%r"(in), [vRL]"r"(vRL) |
| : ); |
| } |
| return out; |
| #else |
| int16_t v = left ? static_cast<int16_t>(vRL) : static_cast<int16_t>(vRL>>16); |
| return static_cast<int32_t>((static_cast<int64_t>(in) * v) >> 16); |
| #endif |
| } |
| |
| static inline |
| int32_t mulAdd(int16_t in, int16_t v, int32_t a) |
| { |
| #if USE_INLINE_ASSEMBLY |
| int32_t out; |
| asm( "smlabb %[out], %[v], %[in], %[a] \n" |
| : [out]"=r"(out) |
| : [in]"%r"(in), [v]"r"(v), [a]"r"(a) |
| : ); |
| return out; |
| #else |
| return a + v * in; |
| #endif |
| } |
| |
| static inline |
| int32_t mulAdd(int16_t in, int32_t v, int32_t a) |
| { |
| #if USE_INLINE_ASSEMBLY |
| int32_t out; |
| asm( "smlawb %[out], %[v], %[in], %[a] \n" |
| : [out]"=r"(out) |
| : [in]"%r"(in), [v]"r"(v), [a]"r"(a) |
| : ); |
| return out; |
| #else |
| return a + static_cast<int32_t>((static_cast<int64_t>(v) * in) >> 16); |
| #endif |
| } |
| |
| static inline |
| int32_t mulAdd(int32_t in, int32_t v, int32_t a) |
| { |
| #if USE_INLINE_ASSEMBLY |
| int32_t out; |
| asm( "smmla %[out], %[v], %[in], %[a] \n" |
| : [out]"=r"(out) |
| : [in]"%r"(in), [v]"r"(v), [a]"r"(a) |
| : ); |
| return out; |
| #else |
| return a + static_cast<int32_t>((static_cast<int64_t>(v) * in) >> 32); |
| #endif |
| } |
| |
| static inline |
| int32_t mulAddRL(int left, uint32_t inRL, int16_t v, int32_t a) |
| { |
| #if USE_INLINE_ASSEMBLY |
| int32_t out; |
| if (left) { |
| asm( "smlabb %[out], %[v], %[inRL], %[a] \n" |
| : [out]"=r"(out) |
| : [inRL]"%r"(inRL), [v]"r"(v), [a]"r"(a) |
| : ); |
| } else { |
| asm( "smlabt %[out], %[v], %[inRL], %[a] \n" |
| : [out]"=r"(out) |
| : [inRL]"%r"(inRL), [v]"r"(v), [a]"r"(a) |
| : ); |
| } |
| return out; |
| #else |
| int16_t s = left ? static_cast<int16_t>(inRL) : static_cast<int16_t>(inRL>>16); |
| return a + v * s; |
| #endif |
| } |
| |
| static inline |
| int32_t mulAddRL(int left, uint32_t inRL, int32_t v, int32_t a) |
| { |
| #if USE_INLINE_ASSEMBLY |
| int32_t out; |
| if (left) { |
| asm( "smlawb %[out], %[v], %[inRL], %[a] \n" |
| : [out]"=r"(out) |
| : [inRL]"%r"(inRL), [v]"r"(v), [a]"r"(a) |
| : ); |
| } else { |
| asm( "smlawt %[out], %[v], %[inRL], %[a] \n" |
| : [out]"=r"(out) |
| : [inRL]"%r"(inRL), [v]"r"(v), [a]"r"(a) |
| : ); |
| } |
| return out; |
| #else |
| int16_t s = left ? static_cast<int16_t>(inRL) : static_cast<int16_t>(inRL>>16); |
| return a + static_cast<int32_t>((static_cast<int64_t>(v) * s) >> 16); |
| #endif |
| } |
| |
| }; // namespace android |
| |
| #endif /*ANDROID_AUDIO_RESAMPLER_FIR_OPS_H*/ |