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Optimization: avoid cvtsd2ss instructions by using explicit floating point litterals. Spectrum histogram calculation optimization

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This commit is contained in:
f4exb
2015-10-09 03:59:28 +02:00
parent 7a798f7dbf
commit 7742c0de2d
7 changed files with 10 additions and 9 deletions
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sdrbase/gui/glspectrum.cpp
+3 -2
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@@ -353,14 +353,15 @@ void GLSpectrum::updateHistogram(const std::vector<Real>& spectrum)
quint8* b = m_histogram;
quint8* h = m_histogramHoldoff;
int sub = 1;
int fftMulSize = 100 * m_fftSize;
if(m_decay > 0)
sub += m_decay;
m_histogramHoldoffCount--;
if(m_histogramHoldoffCount <= 0) {
for(int i = 0; i < 100 * m_fftSize; i++) {
if(*b > 20) {
for(int i = 0; i < fftMulSize; i++) {
if((*b>>4) > 0) { // *b > 16
*b = *b - sub;
} else if(*b > 0) {
if(*h >= sub) {