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// Copyright 2021 Google LLC
//
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree.
$assert BATCH_TILE % 8 == 0
$assert BATCH_TILE >= 8
$SIMD_TILE = BATCH_TILE // 8
#include <assert.h>
#include <immintrin.h>
#include <xnnpack/common.h>
#include <xnnpack/intrinsics-polyfill.h>
#include <xnnpack/vcvt.h>
void xnn_f32_f16_vcvt_ukernel__f16c_x${BATCH_TILE}(
size_t batch,
const float* input,
void* output,
const union xnn_f32_f16_cvt_params params[restrict XNN_MIN_ELEMENTS(1)])
{
assert(batch != 0);
assert(batch % sizeof(float) == 0);
assert(input != NULL);
assert(output != NULL);
uint16_t* o = (uint16_t*) output;
$if BATCH_TILE > 8:
for (; batch >= ${BATCH_TILE} * sizeof(float); batch -= ${BATCH_TILE} * sizeof(float)) {
const __m256 vf0 = _mm256_loadu_ps(input);
$for N in range(1, SIMD_TILE):
const __m256 vf${N} = _mm256_loadu_ps(input + ${N * 8});
input += ${BATCH_TILE};
_mm_storeu_si128((__m128i*) o, _mm256_cvtps_ph(vf0, _MM_FROUND_TO_NEAREST_INT));
$for N in range(1, SIMD_TILE):
_mm_storeu_si128((__m128i*) (o + ${N * 8}), _mm256_cvtps_ph(vf${N}, _MM_FROUND_TO_NEAREST_INT));
o += ${BATCH_TILE};
}
for (; batch >= 8 * sizeof(float); batch -= 8 * sizeof(float)) {
const __m256 vf = _mm256_loadu_ps(input);
input += 8;
_mm_storeu_si128((__m128i*) o, _mm256_cvtps_ph(vf, _MM_FROUND_TO_NEAREST_INT));
o += 8;
}
if XNN_UNLIKELY(batch != 0) {
assert(batch >= 1 * sizeof(float));
assert(batch <= 7 * sizeof(float));
const __m256i vmask = _mm256_loadu_si256((const __m256i*) ((uintptr_t) ¶ms->f16c.mask_table[7] - batch));
const __m256 vf = _mm256_maskload_ps(input, vmask);
__m128 vf_lo = _mm256_castps256_ps128(vf);
if (batch & (4 * sizeof(float))) {
_mm_storel_epi64((__m128i*) o, _mm_cvtps_ph(vf_lo, _MM_FROUND_TO_NEAREST_INT));
vf_lo = _mm256_extractf128_ps(vf, 1);
o += 4;
}
__m128i vh = _mm_cvtps_ph(vf_lo, _MM_FROUND_TO_NEAREST_INT);
if (batch & (2 * sizeof(float))) {
_mm_storeu_si32(o, vh);
vh = _mm_srli_epi64(vh, 32);
o += 2;
}
if (batch & (1 * sizeof(float))) {
*((uint16_t*) o) = _mm_extract_epi16(vh, 0);
}
}
}
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