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Change the linear ramp to something more natural

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This commit is contained in:
Paul Ferrand 2020-03-30 23:48:24 +02:00
parent 8ef598bb7d
commit a71b5c3bb5
2 changed files with 4 additions and 3 deletions
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2
src/sfizz/SIMDHelpers.h
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@ -538,8 +538,8 @@ namespace _internals {
template <class T> template <class T>
inline void snippetRampLinear(T*& output, T& value, T step) inline void snippetRampLinear(T*& output, T& value, T step)
{ {
value += step;
*output++ = value; *output++ = value;
value += step;
} }
} }

5
src/sfizz/SIMDSSE.cpp
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@ -461,7 +461,7 @@ float sfz::linearRamp<float, true>(absl::Span<float> output, float value, float
while (unaligned(out) && out < lastAligned) while (unaligned(out) && out < lastAligned)
_internals::snippetRampLinear<float>(out, value, step); _internals::snippetRampLinear<float>(out, value, step);
auto mmValue = _mm_set1_ps(value); auto mmValue = _mm_set1_ps(value - step);
auto mmStep = _mm_set_ps(step + step + step + step, step + step + step, step + step, step); auto mmStep = _mm_set_ps(step + step + step + step, step + step + step, step + step, step);
while (out < lastAligned) { while (out < lastAligned) {
@ -471,7 +471,8 @@ float sfz::linearRamp<float, true>(absl::Span<float> output, float value, float
out += TypeAlignment; out += TypeAlignment;
} }
value = _mm_cvtss_f32(mmValue); value = _mm_cvtss_f32(mmValue) + step;
while (out < output.end()) while (out < output.end())
_internals::snippetRampLinear<float>(out, value, step); _internals::snippetRampLinear<float>(out, value, step);
return value; return value;