58 lines
No EOL
1.9 KiB
C++
58 lines
No EOL
1.9 KiB
C++
#include "StereoBuffer.h"
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template<>
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template<>
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void StereoBuffer<float>::readInterleaved<SIMD::sse>(float* input, int numFrames) noexcept
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{
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ASSERT(this->numFrames >= numFrames);
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const int residualFrames = numFrames & (2 * TypeAlignment - 1);
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const int lastAligned = numFrames - residualFrames;
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float* in = input;
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auto [lOut, rOut] = getChannels();
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const float* end = input + 2 * lastAligned;
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while (in < end)
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{
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auto register0 = _mm_loadu_ps(in);
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in += 4;
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auto register1 = _mm_loadu_ps(in);
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in += 4;
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auto register2 = register0;
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// register 2 holds the copy of register 0 that is going to get erased by the first operation
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// Remember that the bit mask reads from the end; 10 00 10 00 means
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// "take 0 from a, take 2 from a, take 0 from b, take 2 from b"
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register0 = _mm_shuffle_ps(register0, register1, 0b10001000);
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register1 = _mm_shuffle_ps(register2, register1, 0b11011101);
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_mm_store_ps(lOut, register0);
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_mm_store_ps(rOut, register1);
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lOut += 4;
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rOut += 4;
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}
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end = input + numChannels * numFrames;
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while (in < end)
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{
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*lOut = *in;
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in++;
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*rOut = *in;
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in++;
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lOut += 1;
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rOut += 1;
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}
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}
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template<>
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template<>
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void StereoBuffer<float, 16>::fill<SIMD::sse>(float value) noexcept
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{
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const __m128 mmValue = _mm_set_ps1(value);
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auto [lBegin, rBegin] = getChannels();
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auto [lEnd, rEnd] = alignedEnds();
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auto mmLeft = reinterpret_cast<__m128*>(lBegin);
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auto mmRight = reinterpret_cast<__m128*>(rBegin);
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while(mmLeft < reinterpret_cast<__m128*>(lEnd)) // we should only need to test a single channel
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{
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_mm_store_ps(reinterpret_cast<float*>(mmLeft), mmValue);
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_mm_store_ps(reinterpret_cast<float*>(mmRight), mmValue);
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mmLeft++;
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mmRight++;
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}
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} |