static constexpr IndexType kOutputDimensions = OutputDimensions;
static constexpr IndexType kPaddedInputDimensions =
CeilToMultiple<IndexType>(kInputDimensions, kMaxSimdWidth);
+#if defined (USE_AVX512)
+ static constexpr const IndexType kOutputSimdWidth = kSimdWidth / 2;
+#elif defined (USE_SSSE3)
+ static constexpr const IndexType kOutputSimdWidth = kSimdWidth / 4;
+#endif
// Size of forward propagation buffer used in this layer
static constexpr std::size_t kSelfBufferSize =
for (std::size_t i = 0; i < kOutputDimensions; ++i)
biases_[i] = read_little_endian<BiasType>(stream);
for (std::size_t i = 0; i < kOutputDimensions * kPaddedInputDimensions; ++i)
+#if !defined (USE_SSSE3)
weights_[i] = read_little_endian<WeightType>(stream);
+#else
+ weights_[
+ (i / 4) % (kPaddedInputDimensions / 4) * kOutputDimensions * 4 +
+ i / kPaddedInputDimensions * 4 +
+ i % 4
+ ] = read_little_endian<WeightType>(stream);
-#if defined (USE_SSSE3)
- // Determine if quadruplets of weight and input products can be summed using 16bits
+ // Determine if eights of weight and input products can be summed using 16bits
// without saturation. We assume worst case combinations of 0 and 127 for all inputs.
- if (!stream.fail())
+ if (kOutputDimensions > 1 && !stream.fail())
{
- auto can_saturate = [](const WeightType* w, int idx[4]) {
- int pSum = 0, nSum = 0;
- for (int p = 0; p < 4; ++p)
- if (w[idx[p]] > 0)
- pSum += w[idx[p]];
- else
- nSum += w[idx[p]];
-
- return pSum > 258 || nSum < -258;
- };
-
- for (IndexType i = 0; i < kOutputDimensions; ++i)
- {
- canSaturate16[i] = false;
- const WeightType* w = &weights_[i * kPaddedInputDimensions];
-#if defined (USE_AVX512)
- for (IndexType j = 0; j < (kPaddedInputDimensions & ~127) && !canSaturate16[i]; j += 128)
- for (int k = 0; k < 64 && !canSaturate16[i]; k += 2)
+ canSaturate16.count = 0;
+#if !defined(USE_VNNI)
+ for (IndexType i = 0; i < kPaddedInputDimensions; i += 16)
+ for (IndexType j = 0; j < kOutputDimensions; ++j)
+ for (int x = 0; x < 2; ++x)
{
- int spacing[4] = { 0, 1, 64, 65 };
- canSaturate16[i] = can_saturate(&w[j + k], spacing);
- }
-#elif defined (USE_AVX2)
- for (IndexType j = 0; j < (kPaddedInputDimensions & ~63) && !canSaturate16[i]; j += 64)
- for (int k = 0; k < 32 && !canSaturate16[i]; k += 2)
- {
- int spacing[4] = { 0, 1, 32, 33 };
- canSaturate16[i] = can_saturate(&w[j + k], spacing);
- }
-#elif defined (USE_SSSE3)
- for (IndexType j = 0; j < (kPaddedInputDimensions & ~31) && !canSaturate16[i]; j += 32)
- for (int k = 0; k < 16 && !canSaturate16[i]; k += 2)
- {
- int spacing[4] = { 0, 1, 16, 17 };
- canSaturate16[i] = can_saturate(&w[j + k], spacing);
+ WeightType* w = &weights_[i * kOutputDimensions + j * 4 + x * 2];
+ int sum[2] = {0, 0};
+ for (int k = 0; k < 8; ++k)
+ {
+ IndexType idx = k / 2 * kOutputDimensions * 4 + k % 2;
+ sum[w[idx] < 0] += w[idx];
+ }
+ for (int sign : {-1, 1})
+ while (sign * sum[sign == -1] > 258)
+ {
+ int maxK = 0, maxW = 0;
+ for (int k = 0; k < 8; ++k)
+ {
+ IndexType idx = k / 2 * kOutputDimensions * 4 + k % 2;
+ if (maxW < sign * w[idx])
+ maxK = k, maxW = sign * w[idx];
+ }
+
+ IndexType idx = maxK / 2 * kOutputDimensions * 4 + maxK % 2;
+ sum[sign == -1] -= w[idx];
+ canSaturate16.add(j, i + maxK / 2 * 4 + maxK % 2 + x * 2, w[idx]);
+ w[idx] = 0;
+ }
}
+
+ // Non functional optimization for faster more linear access
+ std::sort(canSaturate16.ids, canSaturate16.ids + canSaturate16.count,
+ [](const typename CanSaturate::Entry& e1, const typename CanSaturate::Entry& e2)
+ { return e1.in == e2.in ? e1.out < e2.out : e1.in < e2.in; });
#endif
- }
}
#endif
return _mm512_reduce_add_epi32(sum) + bias;
};
- // This function takes
- // sum0 = [xmm0a, xmm0b, xmm0c, xmm0d]
- // sum1 = [xmm1a, xmm1b, xmm1c, xmm1d]
- // sum2 = [xmm2a, xmm2b, xmm2c, xmm2d]
- // sum3 = [xmm3a, xmm3b, xmm3c, xmm3d]
- // and returns
- // ret = [
- // reduce_add_epi32(xmm0a), reduce_add_epi32(xmm1a), reduce_add_epi32(xmm2a), reduce_add_epi32(xmm3a),
- // reduce_add_epi32(xmm0b), reduce_add_epi32(xmm1b), reduce_add_epi32(xmm2b), reduce_add_epi32(xmm3b),
- // reduce_add_epi32(xmm0c), reduce_add_epi32(xmm1c), reduce_add_epi32(xmm2c), reduce_add_epi32(xmm3c),
- // reduce_add_epi32(xmm0d), reduce_add_epi32(xmm1d), reduce_add_epi32(xmm2d), reduce_add_epi32(xmm3d)
- // ]
- [[maybe_unused]] auto m512_hadd128x16_interleave = [](
- __m512i sum0, __m512i sum1, __m512i sum2, __m512i sum3) -> __m512i {
-
- __m512i sum01a = _mm512_unpacklo_epi32(sum0, sum1);
- __m512i sum01b = _mm512_unpackhi_epi32(sum0, sum1);
-
- __m512i sum23a = _mm512_unpacklo_epi32(sum2, sum3);
- __m512i sum23b = _mm512_unpackhi_epi32(sum2, sum3);
-
- __m512i sum01 = _mm512_add_epi32(sum01a, sum01b);
- __m512i sum23 = _mm512_add_epi32(sum23a, sum23b);
-
- __m512i sum0123a = _mm512_unpacklo_epi64(sum01, sum23);
- __m512i sum0123b = _mm512_unpackhi_epi64(sum01, sum23);
-
- return _mm512_add_epi32(sum0123a, sum0123b);
- };
-
- [[maybe_unused]] auto m512_haddx4 = [m512_hadd128x16_interleave](
- __m512i sum0, __m512i sum1, __m512i sum2, __m512i sum3, __m128i bias) -> __m128i {
-
- __m512i sum = m512_hadd128x16_interleave(sum0, sum1, sum2, sum3);
-
- __m256i sum256lo = _mm512_castsi512_si256(sum);
- __m256i sum256hi = _mm512_extracti64x4_epi64(sum, 1);
-
- sum256lo = _mm256_add_epi32(sum256lo, sum256hi);
-
- __m128i sum128lo = _mm256_castsi256_si128(sum256lo);
- __m128i sum128hi = _mm256_extracti128_si256(sum256lo, 1);
-
- return _mm_add_epi32(_mm_add_epi32(sum128lo, sum128hi), bias);
- };
-
- [[maybe_unused]] auto m512_haddx8 = [m512_hadd128x16_interleave](
- __m512i sum0, __m512i sum1, __m512i sum2, __m512i sum3,
- __m512i sum4, __m512i sum5, __m512i sum6, __m512i sum7, __m256i bias) -> __m256i {
-
- __m512i suma = m512_hadd128x16_interleave(sum0, sum1, sum2, sum3);
- __m512i sumb = m512_hadd128x16_interleave(sum4, sum5, sum6, sum7);
-
- __m512i indices0 = _mm512_setr_epi64(0, 1, 8, 9, 4, 5, 12, 13);
- __m512i indices1 = _mm512_setr_epi64(2, 3, 10, 11, 6, 7, 14, 15);
- __m512i x = _mm512_add_epi32(
- _mm512_permutex2var_epi64(suma, indices0, sumb),
- _mm512_permutex2var_epi64(suma, indices1, sumb));
-
- __m256i sum256lo = _mm512_castsi512_si256(x);
- __m256i sum256hi = _mm512_extracti64x4_epi64(x, 1);
-
- return _mm256_add_epi32(_mm256_add_epi32(sum256lo, sum256hi), bias);
- };
-
- [[maybe_unused]] auto m512_hadd256x8 =[m512_hadd128x16_interleave](
- __m512i sum0, __m512i sum1, __m512i sum2, __m512i sum3, __m256i bias) -> __m256i {
-
- __m512i sum = m512_hadd128x16_interleave(sum0, sum1, sum2, sum3);
-
- __m512i indices = _mm512_setr_epi32(
- 0, 4, 8, 12, 2, 6, 10, 14,
- 1, 5, 9, 13, 3, 7, 11, 15);
- sum = _mm512_permutexvar_epi32(indices, sum);
-
- __m256i sum256lo = _mm512_castsi512_si256(sum);
- __m256i sum256hi = _mm512_extracti64x4_epi64(sum, 1);
-
- return _mm256_add_epi32(_mm256_hadd_epi32(sum256lo, sum256hi), bias);
- };
-
- [[maybe_unused]] auto m512_hadd256x16 = [m512_hadd128x16_interleave](
- __m512i sum0, __m512i sum1, __m512i sum2, __m512i sum3,
- __m512i sum4, __m512i sum5, __m512i sum6, __m512i sum7, __m512i bias) -> __m512i {
-
- __m512i suma = m512_hadd128x16_interleave(sum0, sum1, sum2, sum3);
- __m512i sumb = m512_hadd128x16_interleave(sum4, sum5, sum6, sum7);
-
- __m512i indices0 = _mm512_setr_epi64(0, 1, 8, 9, 4, 5, 12, 13);
- __m512i indices1 = _mm512_setr_epi64(2, 3, 10, 11, 6, 7, 14, 15);
- __m512i x = _mm512_add_epi32(
- _mm512_permutex2var_epi64(suma, indices0, sumb),
- _mm512_permutex2var_epi64(suma, indices1, sumb));
-
- __m512i indices = _mm512_setr_epi32(0, 8, 1, 9, 2, 10, 3, 11, 4, 12, 5, 13, 6, 14, 7, 15);
- return _mm512_add_epi32(_mm512_permutexvar_epi32(indices, x), bias);
- };
-
[[maybe_unused]] auto m512_add_dpbusd_epi32 = [=](__m512i& acc, __m512i a, __m512i b) {
#if defined (USE_VNNI)
acc = _mm512_dpbusd_epi32(acc, a, b);
#endif
};
- [[maybe_unused]] auto m512_add_dpbusd_epi32x2 = [=](__m512i& acc, __m512i a0, __m512i b0, __m512i a1, __m512i b1) {
+ [[maybe_unused]] auto m512_add_dpbusd_epi32x4 = [=](__m512i& acc, __m512i a0, __m512i b0, __m512i a1, __m512i b1,
+ __m512i a2, __m512i b2, __m512i a3, __m512i b3) {
#if defined (USE_VNNI)
acc = _mm512_dpbusd_epi32(acc, a0, b0);
acc = _mm512_dpbusd_epi32(acc, a1, b1);
+ acc = _mm512_dpbusd_epi32(acc, a2, b2);
+ acc = _mm512_dpbusd_epi32(acc, a3, b3);
#else
__m512i product0 = _mm512_maddubs_epi16(a0, b0);
__m512i product1 = _mm512_maddubs_epi16(a1, b1);
- product0 = _mm512_adds_epi16(product0, product1);
+ __m512i product2 = _mm512_maddubs_epi16(a2, b2);
+ __m512i product3 = _mm512_maddubs_epi16(a3, b3);
+ product0 = _mm512_add_epi16(product0, product1);
+ product2 = _mm512_add_epi16(product2, product3);
+ product0 = _mm512_add_epi16(product0, product2);
product0 = _mm512_madd_epi16(product0, kOnes512);
acc = _mm512_add_epi32(acc, product0);
#endif
return _mm_cvtsi128_si32(sum128) + bias;
};
- [[maybe_unused]] auto m256_haddx4 = [](__m256i sum0, __m256i sum1, __m256i sum2, __m256i sum3, __m128i bias) -> __m128i {
- sum0 = _mm256_hadd_epi32(sum0, sum1);
- sum2 = _mm256_hadd_epi32(sum2, sum3);
-
- sum0 = _mm256_hadd_epi32(sum0, sum2);
-
- __m128i sum128lo = _mm256_castsi256_si128(sum0);
- __m128i sum128hi = _mm256_extracti128_si256(sum0, 1);
-
- return _mm_add_epi32(_mm_add_epi32(sum128lo, sum128hi), bias);
- };
-
[[maybe_unused]] auto m256_add_dpbusd_epi32 = [=](__m256i& acc, __m256i a, __m256i b) {
#if defined (USE_VNNI)
acc = _mm256_dpbusd_epi32(acc, a, b);
#endif
};
- [[maybe_unused]] auto m256_add_dpbusd_epi32x2 = [=](__m256i& acc, __m256i a0, __m256i b0, __m256i a1, __m256i b1) {
+ [[maybe_unused]] auto m256_add_dpbusd_epi32x4 = [=](__m256i& acc, __m256i a0, __m256i b0, __m256i a1, __m256i b1,
+ __m256i a2, __m256i b2, __m256i a3, __m256i b3) {
#if defined (USE_VNNI)
acc = _mm256_dpbusd_epi32(acc, a0, b0);
acc = _mm256_dpbusd_epi32(acc, a1, b1);
+ acc = _mm256_dpbusd_epi32(acc, a2, b2);
+ acc = _mm256_dpbusd_epi32(acc, a3, b3);
#else
__m256i product0 = _mm256_maddubs_epi16(a0, b0);
__m256i product1 = _mm256_maddubs_epi16(a1, b1);
- product0 = _mm256_adds_epi16(product0, product1);
+ __m256i product2 = _mm256_maddubs_epi16(a2, b2);
+ __m256i product3 = _mm256_maddubs_epi16(a3, b3);
+ product0 = _mm256_add_epi16(product0, product1);
+ product2 = _mm256_add_epi16(product2, product3);
+ product0 = _mm256_add_epi16(product0, product2);
product0 = _mm256_madd_epi16(product0, kOnes256);
acc = _mm256_add_epi32(acc, product0);
#endif
};
#endif
-
#if defined (USE_SSSE3)
[[maybe_unused]] const __m128i kOnes128 = _mm_set1_epi16(1);
return _mm_cvtsi128_si32(sum) + bias;
};
- [[maybe_unused]] auto m128_haddx4 = [](__m128i sum0, __m128i sum1, __m128i sum2, __m128i sum3, __m128i bias) -> __m128i {
- sum0 = _mm_hadd_epi32(sum0, sum1);
- sum2 = _mm_hadd_epi32(sum2, sum3);
-
- sum0 = _mm_hadd_epi32(sum0, sum2);
-
- return _mm_add_epi32(sum0, bias);
- };
-
[[maybe_unused]] auto m128_add_dpbusd_epi32 = [=](__m128i& acc, __m128i a, __m128i b) {
__m128i product0 = _mm_maddubs_epi16(a, b);
product0 = _mm_madd_epi16(product0, kOnes128);
acc = _mm_add_epi32(acc, product0);
};
- [[maybe_unused]] auto m128_add_dpbusd_epi32x2 = [=](__m128i& acc, __m128i a0, __m128i b0, __m128i a1, __m128i b1) {
+ [[maybe_unused]] auto m128_add_dpbusd_epi32x4 = [=](__m128i& acc, __m128i a0, __m128i b0, __m128i a1, __m128i b1,
+ __m128i a2, __m128i b2, __m128i a3, __m128i b3) {
__m128i product0 = _mm_maddubs_epi16(a0, b0);
__m128i product1 = _mm_maddubs_epi16(a1, b1);
+ __m128i product2 = _mm_maddubs_epi16(a2, b2);
+ __m128i product3 = _mm_maddubs_epi16(a3, b3);
product0 = _mm_adds_epi16(product0, product1);
+ product2 = _mm_adds_epi16(product2, product3);
+ product0 = _mm_adds_epi16(product0, product2);
product0 = _mm_madd_epi16(product0, kOnes128);
acc = _mm_add_epi32(acc, product0);
};
#endif
#if defined (USE_AVX512)
+ using vec_t = __m512i;
+ #define vec_setzero _mm512_setzero_si512
+ #define vec_set_32 _mm512_set1_epi32
+ auto& vec_add_dpbusd_32 = m512_add_dpbusd_epi32;
+ auto& vec_add_dpbusd_32x4 = m512_add_dpbusd_epi32x4;
+ auto& vec_hadd = m512_hadd;
+#elif defined (USE_AVX2)
+ using vec_t = __m256i;
+ #define vec_setzero _mm256_setzero_si256
+ #define vec_set_32 _mm256_set1_epi32
+ auto& vec_add_dpbusd_32 = m256_add_dpbusd_epi32;
+ auto& vec_add_dpbusd_32x4 = m256_add_dpbusd_epi32x4;
+ auto& vec_hadd = m256_hadd;
+#elif defined (USE_SSSE3)
+ using vec_t = __m128i;
+ #define vec_setzero _mm_setzero_si128
+ #define vec_set_32 _mm_set1_epi32
+ auto& vec_add_dpbusd_32 = m128_add_dpbusd_epi32;
+ auto& vec_add_dpbusd_32x4 = m128_add_dpbusd_epi32x4;
+ auto& vec_hadd = m128_hadd;
+#endif
- constexpr IndexType kNumChunks512 = kPaddedInputDimensions / (kSimdWidth * 2);
- constexpr IndexType kNumChunks256 = kPaddedInputDimensions / kSimdWidth;
+#if defined (USE_SSSE3)
const auto output = reinterpret_cast<OutputType*>(buffer);
+ const auto input_vector = reinterpret_cast<const vec_t*>(input);
- // Since to saturate a zmm register it takes 64 bytes we
- // cannot use AVX512 for the smaller affine transforms.
- // Instead we fallback to a AVX2 implementation if the
- // kInputDimensions isn't a multiple of 64.
- // Note that this means that for example for
- // kInputDimensions of 96 we fallback to AVX2 even though
- // the first 64 elements could be processed with AVX512.
- // This is caused by mixing the __m256 and __m512 variables
- // required to better handle that case and it would
- // require handling more cases statically not to lose performance.
- // This should be revisited if such input dimensions are to be considered.
- [[maybe_unused]] const auto input_vector512 = reinterpret_cast<const __m512i*>(input);
- [[maybe_unused]] const auto input_vector256 = reinterpret_cast<const __m256i*>(input);
+ static_assert(kOutputDimensions % kOutputSimdWidth == 0 || kOutputDimensions == 1);
// kOutputDimensions is either 1 or a multiple of kSimdWidth
// because then it is also an input dimension.
- if constexpr (kOutputDimensions % 16 == 0 && kNumChunks256 == 1)
- {
- for (IndexType i = 0; i < kOutputDimensions; i += 16)
- {
- const IndexType offset01a = (i + 0) * kPaddedInputDimensions;
- const IndexType offset23a = (i + 2) * kPaddedInputDimensions;
- const IndexType offset45a = (i + 4) * kPaddedInputDimensions;
- const IndexType offset67a = (i + 6) * kPaddedInputDimensions;
- const IndexType offset01b = (i + 8) * kPaddedInputDimensions;
- const IndexType offset23b = (i + 10) * kPaddedInputDimensions;
- const IndexType offset45b = (i + 12) * kPaddedInputDimensions;
- const IndexType offset67b = (i + 14) * kPaddedInputDimensions;
-
- const __m512i bias = *reinterpret_cast<const __m512i*>(&biases_[i]);
- __m512i* outptr = reinterpret_cast<__m512i*>(&output[i]);
-
- __m512i sum01a = _mm512_setzero_si512();
- __m512i sum23a = _mm512_setzero_si512();
- __m512i sum45a = _mm512_setzero_si512();
- __m512i sum67a = _mm512_setzero_si512();
- __m512i sum01b = _mm512_setzero_si512();
- __m512i sum23b = _mm512_setzero_si512();
- __m512i sum45b = _mm512_setzero_si512();
- __m512i sum67b = _mm512_setzero_si512();
-
- const auto row01a = *reinterpret_cast<const __m512i*>(&weights_[offset01a]);
- const auto row23a = *reinterpret_cast<const __m512i*>(&weights_[offset23a]);
- const auto row45a = *reinterpret_cast<const __m512i*>(&weights_[offset45a]);
- const auto row67a = *reinterpret_cast<const __m512i*>(&weights_[offset67a]);
- const auto row01b = *reinterpret_cast<const __m512i*>(&weights_[offset01b]);
- const auto row23b = *reinterpret_cast<const __m512i*>(&weights_[offset23b]);
- const auto row45b = *reinterpret_cast<const __m512i*>(&weights_[offset45b]);
- const auto row67b = *reinterpret_cast<const __m512i*>(&weights_[offset67b]);
-
- const __m256i in256 = input_vector256[0];
- const __m512i in = _mm512_inserti64x4(_mm512_castsi256_si512(in256), in256, 1);
-
- m512_add_dpbusd_epi32(sum01a, in, row01a);
- m512_add_dpbusd_epi32(sum23a, in, row23a);
- m512_add_dpbusd_epi32(sum45a, in, row45a);
- m512_add_dpbusd_epi32(sum67a, in, row67a);
- m512_add_dpbusd_epi32(sum01b, in, row01b);
- m512_add_dpbusd_epi32(sum23b, in, row23b);
- m512_add_dpbusd_epi32(sum45b, in, row45b);
- m512_add_dpbusd_epi32(sum67b, in, row67b);
-
- *outptr = m512_hadd256x16(
- sum01a, sum23a, sum45a, sum67a,
- sum01b, sum23b, sum45b, sum67b, bias);
- }
- }
- else if constexpr (kOutputDimensions % 4 == 0)
- {
- for (IndexType i = 0; i < kOutputDimensions; i += 4)
- {
- const IndexType offset0 = (i + 0) * kPaddedInputDimensions;
- const IndexType offset1 = (i + 1) * kPaddedInputDimensions;
- const IndexType offset2 = (i + 2) * kPaddedInputDimensions;
- const IndexType offset3 = (i + 3) * kPaddedInputDimensions;
-
- const __m128i bias = *reinterpret_cast<const __m128i*>(&biases_[i]);
- __m128i* outptr = reinterpret_cast<__m128i*>(&output[i]);
-
- if constexpr (kPaddedInputDimensions % (kSimdWidth * 2) == 0)
- {
- __m512i sum0 = _mm512_setzero_si512();
- __m512i sum1 = _mm512_setzero_si512();
- __m512i sum2 = _mm512_setzero_si512();
- __m512i sum3 = _mm512_setzero_si512();
-
- const auto row0 = reinterpret_cast<const __m512i*>(&weights_[offset0]);
- const auto row1 = reinterpret_cast<const __m512i*>(&weights_[offset1]);
- const auto row2 = reinterpret_cast<const __m512i*>(&weights_[offset2]);
- const auto row3 = reinterpret_cast<const __m512i*>(&weights_[offset3]);
-
- int j = 0;
- if (!canSaturate16x4[i / 4])
- {
- for (; j < (int)kNumChunks512 - 1; j += 2)
- {
- const __m512i in0 = input_vector512[j];
- const __m512i in1 = input_vector512[j + 1];
-
- m512_add_dpbusd_epi32x2(sum0, in0, row0[j], in1, row0[j + 1]);
- m512_add_dpbusd_epi32x2(sum1, in0, row1[j], in1, row1[j + 1]);
- m512_add_dpbusd_epi32x2(sum2, in0, row2[j], in1, row2[j + 1]);
- m512_add_dpbusd_epi32x2(sum3, in0, row3[j], in1, row3[j + 1]);
- }
- }
- for (; j < (int)kNumChunks512; ++j)
- {
- const __m512i in = input_vector512[j];
-
- m512_add_dpbusd_epi32(sum0, in, row0[j]);
- m512_add_dpbusd_epi32(sum1, in, row1[j]);
- m512_add_dpbusd_epi32(sum2, in, row2[j]);
- m512_add_dpbusd_epi32(sum3, in, row3[j]);
- }
-
- *outptr = m512_haddx4(sum0, sum1, sum2, sum3, bias);
- }
- else
- {
- __m256i sum0 = _mm256_setzero_si256();
- __m256i sum1 = _mm256_setzero_si256();
- __m256i sum2 = _mm256_setzero_si256();
- __m256i sum3 = _mm256_setzero_si256();
-
- const auto row0 = reinterpret_cast<const __m256i*>(&weights_[offset0]);
- const auto row1 = reinterpret_cast<const __m256i*>(&weights_[offset1]);
- const auto row2 = reinterpret_cast<const __m256i*>(&weights_[offset2]);
- const auto row3 = reinterpret_cast<const __m256i*>(&weights_[offset3]);
-
- for (IndexType j = 0; j < kNumChunks256; ++j)
- {
- const __m256i in = input_vector256[j];
-
- m256_add_dpbusd_epi32(sum0, in, row0[j]);
- m256_add_dpbusd_epi32(sum1, in, row1[j]);
- m256_add_dpbusd_epi32(sum2, in, row2[j]);
- m256_add_dpbusd_epi32(sum3, in, row3[j]);
- }
-
- *outptr = m256_haddx4(sum0, sum1, sum2, sum3, bias);
- }
- }
- }
- else if constexpr (kOutputDimensions == 1)
+ if constexpr (kOutputDimensions % kOutputSimdWidth == 0)
{
- if constexpr (kPaddedInputDimensions % (kSimdWidth * 2) == 0)
- {
- __m512i sum0 = _mm512_setzero_si512();
+ constexpr IndexType kNumChunks = kPaddedInputDimensions / 4;
- const auto row0 = reinterpret_cast<const __m512i*>(&weights_[0]);
+ const auto input32 = reinterpret_cast<const std::int32_t*>(input);
+ vec_t* outptr = reinterpret_cast<vec_t*>(output);
+ std::memcpy(output, biases_, kOutputDimensions * sizeof(OutputType));
- for (IndexType j = 0; j < kNumChunks512; ++j)
+ for (int i = 0; i < (int)kNumChunks - 3; i += 4)
{
- const __m512i in = input_vector512[j];
-
- m512_add_dpbusd_epi32(sum0, in, row0[j]);
+ const vec_t in0 = vec_set_32(input32[i + 0]);
+ const vec_t in1 = vec_set_32(input32[i + 1]);
+ const vec_t in2 = vec_set_32(input32[i + 2]);
+ const vec_t in3 = vec_set_32(input32[i + 3]);
+ const auto col0 = reinterpret_cast<const vec_t*>(&weights_[(i + 0) * kOutputDimensions * 4]);
+ const auto col1 = reinterpret_cast<const vec_t*>(&weights_[(i + 1) * kOutputDimensions * 4]);
+ const auto col2 = reinterpret_cast<const vec_t*>(&weights_[(i + 2) * kOutputDimensions * 4]);
+ const auto col3 = reinterpret_cast<const vec_t*>(&weights_[(i + 3) * kOutputDimensions * 4]);
+ for (int j = 0; j * kOutputSimdWidth < kOutputDimensions; ++j)
+ vec_add_dpbusd_32x4(outptr[j], in0, col0[j], in1, col1[j], in2, col2[j], in3, col3[j]);
}
-
- output[0] = m512_hadd(sum0, biases_[0]);
- }
- else
- {
- __m256i sum0 = _mm256_setzero_si256();
-
- const auto row0 = reinterpret_cast<const __m256i*>(&weights_[0]);
-
- for (IndexType j = 0; j < kNumChunks256; ++j)
- {
- const __m256i in = input_vector256[j];
-
- m256_add_dpbusd_epi32(sum0, in, row0[j]);
- }
-
- output[0] = m256_hadd(sum0, biases_[0]);
- }
- }
- else
- {
- // This case can never happen because kOutputDimensions
- // is always 1 or a multiple of kSimdWidth.
- assert(false);
- }
-
-#elif defined (USE_AVX2)
-
- constexpr IndexType kNumChunks = kPaddedInputDimensions / kSimdWidth;
-
- const auto output = reinterpret_cast<OutputType*>(buffer);
- const auto input_vector = reinterpret_cast<const __m256i*>(input);
-
- // kOutputDimensions is either 1 or a multiple of kSimdWidth
- // because then it is also an input dimension.
- if constexpr (kOutputDimensions % 4 == 0)
- {
- for (IndexType i = 0; i < kOutputDimensions; i += 4)
- {
- const IndexType offset0 = (i + 0) * kPaddedInputDimensions;
- const IndexType offset1 = (i + 1) * kPaddedInputDimensions;
- const IndexType offset2 = (i + 2) * kPaddedInputDimensions;
- const IndexType offset3 = (i + 3) * kPaddedInputDimensions;
-
- const __m128i bias = *reinterpret_cast<const __m128i*>(&biases_[i]);
- __m128i* outptr = reinterpret_cast<__m128i*>(&output[i]);
-
- __m256i sum0 = _mm256_setzero_si256();
- __m256i sum1 = _mm256_setzero_si256();
- __m256i sum2 = _mm256_setzero_si256();
- __m256i sum3 = _mm256_setzero_si256();
-
- const auto row0 = reinterpret_cast<const __m256i*>(&weights_[offset0]);
- const auto row1 = reinterpret_cast<const __m256i*>(&weights_[offset1]);
- const auto row2 = reinterpret_cast<const __m256i*>(&weights_[offset2]);
- const auto row3 = reinterpret_cast<const __m256i*>(&weights_[offset3]);
-
- int j = 0;
- if (!canSaturate16x4[i / 4])
- {
- for (; j < (int)kNumChunks - 1; j += 2)
- {
- const __m256i in0 = input_vector[j];
- const __m256i in1 = input_vector[j + 1];
-
- m256_add_dpbusd_epi32x2(sum0, in0, row0[j], in1, row0[j + 1]);
- m256_add_dpbusd_epi32x2(sum1, in0, row1[j], in1, row1[j + 1]);
- m256_add_dpbusd_epi32x2(sum2, in0, row2[j], in1, row2[j + 1]);
- m256_add_dpbusd_epi32x2(sum3, in0, row3[j], in1, row3[j + 1]);
- }
- }
- for (; j < (int)kNumChunks; ++j)
- {
- const __m256i in = input_vector[j];
-
- m256_add_dpbusd_epi32(sum0, in, row0[j]);
- m256_add_dpbusd_epi32(sum1, in, row1[j]);
- m256_add_dpbusd_epi32(sum2, in, row2[j]);
- m256_add_dpbusd_epi32(sum3, in, row3[j]);
- }
-
- *outptr = m256_haddx4(sum0, sum1, sum2, sum3, bias);
- }
+ for (int i = 0; i < canSaturate16.count; ++i)
+ output[canSaturate16.ids[i].out] += input[canSaturate16.ids[i].in] * canSaturate16.ids[i].w;
}
else if constexpr (kOutputDimensions == 1)
{
- __m256i sum0 = _mm256_setzero_si256();
-
- const auto row0 = reinterpret_cast<const __m256i*>(&weights_[0]);
-
- for (IndexType j = 0; j < kNumChunks; ++j)
- {
- const __m256i in = input_vector[j];
-
- m256_add_dpbusd_epi32(sum0, in, row0[j]);
- }
-
- output[0] = m256_hadd(sum0, biases_[0]);
- }
- else
- {
- // This case can never happen because kOutputDimensions
- // is always 1 or a multiple of kSimdWidth.
- assert(false);
- }
+ constexpr IndexType kNumChunks = kPaddedInputDimensions / kSimdWidth;
-#elif defined (USE_SSSE3)
+ vec_t sum0 = vec_setzero();
- constexpr IndexType kNumChunks = kPaddedInputDimensions / kSimdWidth;
+ const auto row0 = reinterpret_cast<const vec_t*>(&weights_[0]);
- auto output = reinterpret_cast<OutputType*>(buffer);
- const auto input_vector = reinterpret_cast<const __m128i*>(input);
-
- // kOutputDimensions is either 1 or a multiple of kSimdWidth
- // because then it is also an input dimension.
- if constexpr (kOutputDimensions % 4 == 0)
- {
- for (IndexType i = 0; i < kOutputDimensions; i += 4)
- {
- const IndexType offset0 = (i + 0) * kPaddedInputDimensions;
- const IndexType offset1 = (i + 1) * kPaddedInputDimensions;
- const IndexType offset2 = (i + 2) * kPaddedInputDimensions;
- const IndexType offset3 = (i + 3) * kPaddedInputDimensions;
-
- const __m128i bias = *reinterpret_cast<const __m128i*>(&biases_[i]);
- __m128i* outptr = reinterpret_cast<__m128i*>(&output[i]);
-
- __m128i sum0 = _mm_setzero_si128();
- __m128i sum1 = _mm_setzero_si128();
- __m128i sum2 = _mm_setzero_si128();
- __m128i sum3 = _mm_setzero_si128();
-
- const auto row0 = reinterpret_cast<const __m128i*>(&weights_[offset0]);
- const auto row1 = reinterpret_cast<const __m128i*>(&weights_[offset1]);
- const auto row2 = reinterpret_cast<const __m128i*>(&weights_[offset2]);
- const auto row3 = reinterpret_cast<const __m128i*>(&weights_[offset3]);
-
- int j = 0;
- if (!canSaturate16x4[i / 4])
- {
- for (; j < (int)kNumChunks - 1; j += 2)
- {
- const __m128i in0 = input_vector[j];
- const __m128i in1 = input_vector[j + 1];
-
- m128_add_dpbusd_epi32x2(sum0, in0, row0[j], in1, row0[j + 1]);
- m128_add_dpbusd_epi32x2(sum1, in0, row1[j], in1, row1[j + 1]);
- m128_add_dpbusd_epi32x2(sum2, in0, row2[j], in1, row2[j + 1]);
- m128_add_dpbusd_epi32x2(sum3, in0, row3[j], in1, row3[j + 1]);
- }
- }
- for (; j < (int)kNumChunks; ++j)
+ for (int j = 0; j < (int)kNumChunks; ++j)
{
- const __m128i in = input_vector[j];
+ const vec_t in = input_vector[j];
- m128_add_dpbusd_epi32(sum0, in, row0[j]);
- m128_add_dpbusd_epi32(sum1, in, row1[j]);
- m128_add_dpbusd_epi32(sum2, in, row2[j]);
- m128_add_dpbusd_epi32(sum3, in, row3[j]);
+ vec_add_dpbusd_32(sum0, in, row0[j]);
}
- *outptr = m128_haddx4(sum0, sum1, sum2, sum3, bias);
- }
- }
- else if constexpr (kOutputDimensions == 1)
- {
- __m128i sum0 = _mm_setzero_si128();
-
- const auto row0 = reinterpret_cast<const __m128i*>(&weights_[0]);
-
- for (int j = 0; j < (int)kNumChunks; ++j)
- {
- const __m128i in = input_vector[j];
-
- m128_add_dpbusd_epi32(sum0, in, row0[j]);
- }
-
- output[0] = m128_hadd(sum0, biases_[0]);
- }
- else
- {
- // This case can never happen because kOutputDimensions
- // is always 1 or a multiple of kSimdWidth.
- assert(false);
+ output[0] = vec_hadd(sum0, biases_[0]);
}
#else
#if defined(USE_SSE2)
constexpr IndexType kNumChunks = kPaddedInputDimensions / kSimdWidth;
-#ifndef USE_SSSE3
const __m128i kZeros = _mm_setzero_si128();
-#else
- const __m128i kOnes = _mm_set1_epi16(1);
-#endif
const auto input_vector = reinterpret_cast<const __m128i*>(input);
#elif defined(USE_MMX)
alignas(kCacheLineSize) BiasType biases_[kOutputDimensions];
alignas(kCacheLineSize) WeightType weights_[kOutputDimensions * kPaddedInputDimensions];
- union {
- uint32_t canSaturate16x4[(kOutputDimensions + 3) / 4];
- bool canSaturate16[kOutputDimensions];
- };
+#if defined (USE_SSSE3)
+ struct CanSaturate {
+ int count;
+ struct Entry {
+ uint16_t out;
+ uint16_t in;
+ int8_t w;
+ } ids[kPaddedInputDimensions * kOutputDimensions * 3 / 4];
+
+ void add(int i, int j, int8_t w) {
+ ids[count].out = i;
+ ids[count].in = j;
+ ids[count].w = w;
+ ++count;
+ }
+ } canSaturate16;
+#endif
};
} // namespace Eval::NNUE::Layers
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