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[MultiVarStore] Add SSE codepath

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Doesn't speed up much. Keeping here for now, and adding a
Neon path next.
This commit is contained in:
Behdad Esfahbod 2024-09-26 13:25:49 -06:00
parent 3236ced128
commit 0c215616d8
1 changed files with 66 additions and 6 deletions
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72
src/hb-ot-layout-common.hh
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@ -38,6 +38,11 @@
#include "OT/Layout/Common/Coverage.hh"
#include "OT/Layout/types.hh"
#ifdef __SSE__
#include <xmmintrin.h>
#endif
// TODO(garretrieger): cleanup these after migration.
using OT::Layout::Common::Coverage;
using OT::Layout::Common::RangeRecord;
@ -3129,6 +3134,66 @@ struct MultiVarData
+ StructAfter<CFF2Index> (regionIndices).get_size ();
}
template <typename Iter>
void _copy (Iter &values_iter, unsigned count, float scalar, float *out) const
{
if (scalar == 1.f)
for (unsigned i = 0; i < count; i++)
out[i] += *values_iter++;
else
for (unsigned i = 0; i < count; i++)
out[i] += *values_iter++ * scalar;
}
void _copy (hb_array_t<const float> &values_iter, unsigned count, float scalar, float *out) const
{
const float *in = values_iter.arrayZ;
count = hb_min (count, values_iter.length);
values_iter += count;
#ifdef __SSE__
{
if (scalar == 1.f)
{
// SSE version
unsigned i = 0;
for (; i + 4 <= count; i += 4)
{
__m128 a = _mm_loadu_ps (in + i);
__m128 b = _mm_loadu_ps (out + i);
_mm_storeu_ps (out + i, _mm_add_ps (a, b));
}
for (; i < count; i++)
out[i] += in[i];
}
else
{
// SSE version
unsigned i = 0;
__m128 s = _mm_set1_ps (scalar);
for (; i + 4 <= count; i += 4)
{
__m128 a = _mm_loadu_ps (in + i);
__m128 b = _mm_loadu_ps (out + i);
_mm_storeu_ps (out + i, _mm_add_ps (_mm_mul_ps (a, s), b));
}
for (; i < count; i++)
out[i] += in[i] * scalar;
}
return;
}
#endif
// Fallback
{
if (scalar == 1.f)
for (unsigned i = 0; i < count; i++)
out[i] += in[i];
else
for (unsigned i = 0; i < count; i++)
out[i] += in[i] * scalar;
}
}
template <typename DeltaSets>
void get_delta_for_type (unsigned int inner,
const int *coords, unsigned int coord_count,
@ -3153,12 +3218,7 @@ struct MultiVarData
continue;
}
if (scalar == 1.f)
for (unsigned i = 0; i < count; i++)
out.arrayZ[i] += *values_iter++;
else
for (unsigned i = 0; i < count; i++)
out.arrayZ[i] += *values_iter++ * scalar;
_copy (values_iter, count, scalar, out.arrayZ);
}
}