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[MultiVarStore] Reinstate SSE / NEON paths

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Code is both smaller and slightly faster.
This commit is contained in:
Behdad Esfahbod 2024-09-29 09:30:11 -06:00
parent 00d7d90b3c
commit 0eaf833366
1 changed files with 53 additions and 2 deletions
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55
src/hb-ot-layout-common.hh
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@ -38,6 +38,12 @@
#include "OT/Layout/Common/Coverage.hh"
#include "OT/Layout/types.hh"
#ifdef __SSE__
#include <xmmintrin.h>
#elif defined(__ARM_NEON)
#include <arm_neon.h>
#endif
// TODO(garretrieger): cleanup these after migration.
using OT::Layout::Common::Coverage;
@ -3147,11 +3153,56 @@ struct MultiVarData
values_iter += count;
if (scalar == 1.f)
for (unsigned i = 0; i < count; i++)
{
unsigned i = 0;
for (; i + 4 <= count; i += 4)
{
#ifdef __SSE__
__m128 a = _mm_loadu_ps (in + i);
__m128 b = _mm_loadu_ps (out + i);
_mm_storeu_ps (out + i, _mm_add_ps (a, b));
#elif defined(__ARM_NEON)
float32x4_t a = vld1q_f32 (in + i);
float32x4_t b = vld1q_f32 (out + i);
vst1q_f32 (out + i, vaddq_f32 (a, b));
#else
out[i + 0] += in[i + 0];
out[i + 1] += in[i + 1];
out[i + 2] += in[i + 2];
out[i + 3] += in[i + 3];
#endif
}
for (; i < count; i++)
out[i] += in[i];
}
else
for (unsigned i = 0; i < count; i++)
{
unsigned i = 0;
#ifdef __SSE__
__m128 s = _mm_set1_ps (scalar);
#elif defined(__ARM_NEON)
float32x4_t s = vdupq_n_f32 (scalar);
#endif
for (; i + 4 <= count; i += 4)
{
#ifdef __SSE__
__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));
#elif defined(__ARM_NEON)
float32x4_t a = vld1q_f32 (in + i);
float32x4_t b = vld1q_f32 (out + i);
vst1q_f32 (out + i, vmlaq_f32 (b, a, s));
#else
out[i + 0] += in[i + 0] * scalar;
out[i + 1] += in[i + 1] * scalar;
out[i + 2] += in[i + 2] * scalar;
out[i + 3] += in[i + 3] * scalar;
#endif
}
for (; i < count; i++)
out[i] += in[i] * scalar;
}
}
template <typename DeltaSets>