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CDROM: Add NEON implementation of GetPeakVolume()

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This commit is contained in:
Stenzek 2023-10-01 14:18:58 +10:00
parent 01e505ec8b
commit ecb082b672
1 changed files with 16 additions and 2 deletions
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18
src/core/cdrom.cpp
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@ -3071,9 +3071,13 @@ static s16 GetPeakVolume(const u8* raw_sector, u8 channel)
{
static constexpr u32 NUM_SAMPLES = CDImage::RAW_SECTOR_SIZE / sizeof(s16);
#if defined(CPU_ARCH_SSE)
#if defined(CPU_ARCH_SSE) || defined(CPU_ARCH_NEON)
static_assert(Common::IsAlignedPow2(NUM_SAMPLES, 8));
const u8* current_ptr = raw_sector;
s16 v_peaks[8];
#if defined(CPU_ARCH_SSE)
__m128i v_peak = _mm_set1_epi16(0);
for (u32 i = 0; i < NUM_SAMPLES; i += 8)
{
@ -3081,8 +3085,18 @@ static s16 GetPeakVolume(const u8* raw_sector, u8 channel)
v_peak = _mm_max_epi16(val, v_peak);
current_ptr += 16;
}
s16 v_peaks[8];
_mm_store_si128(reinterpret_cast<__m128i*>(v_peaks), v_peak);
#elif defined(CPU_ARCH_NEON)
int16x8_t v_peak = vdupq_n_s16(0);
for (u32 i = 0; i < NUM_SAMPLES; i += 8)
{
int16x8_t val = vld1q_s16(reinterpret_cast<const s16*>(current_ptr));
v_peak = vmaxq_s16(val, v_peak);
current_ptr += 16;
}
vst1q_s16(v_peaks, v_peak);
#endif
if (channel == 0)
return std::max(v_peaks[0], std::max(v_peaks[2], std::max(v_peaks[4], v_peaks[6])));
else