mirror/JUCE
1
0
Fork 0
mirror of https://github.com/juce-framework/JUCE.git synced 2026-01-10 23:44:24 +00:00
Code Activity

Added FloatVectorOperations::findMinimum and findMaximum

Browse source
This commit is contained in:
jules 2013-03-05 21:58:52 +00:00
parent 4fe02d2c8d
commit 408399ddff
2 changed files with 75 additions and 7 deletions
Download patch file Download diff file Expand all files Collapse all files

76
modules/juce_audio_basics/buffers/juce_FloatVectorOperations.cpp
View file

@ -49,6 +49,61 @@ namespace FloatVectorHelpers
_mm_empty();
#endif
}
static inline float findMinimumOrMaximum (const float* src, int num, const bool isMinimum) noexcept
{
#if JUCE_USE_SSE_INTRINSICS
const int numLongOps = num / 4;
if (numLongOps > 1 && FloatVectorHelpers::isSSE2Available())
{
__m128 val;
#define JUCE_MINIMUMMAXIMUM_SSE_LOOP(loadOp, minMaxOp) \
val = loadOp (src); \
src += 4; \
for (int i = 1; i < numLongOps; ++i) \
{ \
const __m128 s = loadOp (src); \
val = minMaxOp (val, s); \
src += 4; \
}
if (isMinimum)
{
if (FloatVectorHelpers::isAligned (src)) { JUCE_MINIMUMMAXIMUM_SSE_LOOP (_mm_load_ps, _mm_min_ps) }
else { JUCE_MINIMUMMAXIMUM_SSE_LOOP (_mm_loadu_ps, _mm_min_ps) }
}
else
{
if (FloatVectorHelpers::isAligned (src)) { JUCE_MINIMUMMAXIMUM_SSE_LOOP (_mm_load_ps, _mm_max_ps) }
else { JUCE_MINIMUMMAXIMUM_SSE_LOOP (_mm_loadu_ps,_mm_max_ps) }
}
float localVal;
{
float vals[4];
_mm_storeu_ps (vals, val);
FloatVectorHelpers::mmEmpty();
localVal = isMinimum ? jmin (vals[0], vals[1], vals[2], vals[3])
: jmax (vals[0], vals[1], vals[2], vals[3]);
}
num &= 3;
for (int i = 0; i < num; ++i)
localVal = isMinimum ? jmin (localVal, src[i])
: jmax (localVal, src[i]);
return localVal;
}
#endif
return isMinimum ? juce::findMinimum (src, num)
: juce::findMaximum (src, num);
}
}
#define JUCE_BEGIN_SSE_OP \
@ -255,14 +310,11 @@ void JUCE_CALLTYPE FloatVectorOperations::findMinAndMax (const float* src, int n
num &= 3;
if (num != 0)
for (int i = 0; i < num; ++i)
{
for (int i = 0; i < num; ++i)
{
const float s = src[i];
localMin = jmin (localMin, s);
localMax = jmax (localMax, s);
}
const float s = src[i];
localMin = jmin (localMin, s);
localMax = jmax (localMax, s);
}
minResult = localMin;
@ -273,3 +325,13 @@ void JUCE_CALLTYPE FloatVectorOperations::findMinAndMax (const float* src, int n
juce::findMinAndMax (src, num, minResult, maxResult);
}
float JUCE_CALLTYPE FloatVectorOperations::findMinimum (const float* src, int num) noexcept
{
return FloatVectorHelpers::findMinimumOrMaximum (src, num, true);
}
float JUCE_CALLTYPE FloatVectorOperations::findMaximum (const float* src, int num) noexcept
{
return FloatVectorHelpers::findMinimumOrMaximum (src, num, false);
}

6
modules/juce_audio_basics/buffers/juce_FloatVectorOperations.h
View file

@ -68,6 +68,12 @@ public:
/** Finds the miniumum and maximum values in the given array. */
static void JUCE_CALLTYPE findMinAndMax (const float* src, int numValues, float& minResult, float& maxResult) noexcept;
/** Finds the miniumum value in the given array. */
static float JUCE_CALLTYPE findMinimum (const float* src, int numValues) noexcept;
/** Finds the maximum value in the given array. */
static float JUCE_CALLTYPE findMaximum (const float* src, int numValues) noexcept;
};