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Added a SSSE3 version of the swap16 and memcpy used by the mixer 

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@6824 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
skidau 2011-01-12 07:08:35 +00:00
parent 5255c35a1d
commit 542078c447
1 changed files with 19 additions and 2 deletions
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21
Source/Core/AudioCommon/Src/Mixer.cpp
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@ -19,6 +19,9 @@
#include "Atomic.h"
#include "Mixer.h"
#include "AudioCommon.h"
#include "CPUDetect.h"
static const __m128i sr_mask = _mm_set_epi32(0x0E0F0C0DL, 0x0A0B0809L, 0x06070405L, 0x02030001L);
// Executed from sound stream thread
unsigned int CMixer::Mix(short* samples, unsigned int numSamples)
@ -53,8 +56,22 @@ unsigned int CMixer::Mix(short* samples, unsigned int numSamples)
// Do re-sampling if needed
if (m_sampleRate == 32000)
{
for (unsigned int i = 0; i < numLeft * 2; i++)
samples[i] = Common::swap16(m_buffer[(m_indexR + i) & INDEX_MASK]);
#if _M_SSE >= 0x301
if (cpu_info.bSSSE3 && !((numLeft * 2) % 8))
{
for (unsigned int i = 0; i < numLeft * 2; i += 8)
{
_mm_storeu_si128((__m128i *)&samples[i], _mm_shuffle_epi8(_mm_loadu_si128((__m128i *)&m_buffer[(m_indexR + i) & INDEX_MASK]), sr_mask));
}
}
else
#endif
{
for (unsigned int i = 0; i < numLeft * 2; i++)
{
samples[i] = Common::swap16(m_buffer[(m_indexR + i) & INDEX_MASK]);
}
}
m_indexR += numLeft * 2;
}
else //linear interpolation