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/*
* 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 defined(__aarch64__) || 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*/
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