diff options
Diffstat (limited to 'src/cpu/kernels/softmax/generic/neon/impl.cpp')
| -rw-r--r-- | src/cpu/kernels/softmax/generic/neon/impl.cpp | 353 |
1 files changed, 343 insertions, 10 deletions
diff --git a/src/cpu/kernels/softmax/generic/neon/impl.cpp b/src/cpu/kernels/softmax/generic/neon/impl.cpp index 487f6ae051..31baf8a9df 100644 --- a/src/cpu/kernels/softmax/generic/neon/impl.cpp +++ b/src/cpu/kernels/softmax/generic/neon/impl.cpp @@ -1,5 +1,5 @@ /* - * Copyright (c) 2021-2023 Arm Limited. + * Copyright (c) 2021-2024 Arm Limited. * * SPDX-License-Identifier: MIT * @@ -30,8 +30,11 @@ namespace arm_compute namespace cpu { template <typename T, bool IS_LOG> -void neon_softmax_quantized(const ITensor *in, void *const tmp, ITensor *out, float beta, const Window &window) +void neon_softmax_x_quantized( + const ITensor *in, void *const tmp, ITensor *out, float beta, int axis, const Window &window) { + ARM_COMPUTE_UNUSED(axis); + static_assert(std::is_same<T, qasymm8_t>::value || std::is_same<T, qasymm8_signed_t>::value, "quantized type should be either qasymm8_t or qasymm8_signed_t."); @@ -248,16 +251,346 @@ void neon_softmax_quantized(const ITensor *in, void *const tmp, ITensor *out, fl in_it, out_it); } -template void neon_softmax_quantized<qasymm8_signed_t, true>( - const ITensor *in, void *const tmp, ITensor *out, float beta, const Window &window); +template <typename T, bool IS_LOG> +void neon_softmax_non_x_quantized( + const ITensor *in, void *const tmp, ITensor *out, float beta, int axis, const Window &window) +{ + static_assert(std::is_same<T, qasymm8_t>::value || std::is_same<T, qasymm8_signed_t>::value, + "quantized type should be either qasymm8_t or qasymm8_signed_t."); + + const float scale_beta = -beta * in->info()->quantization_info().uniform().scale; + const float32x4_t scale_beta_vec = vdupq_n_f32(scale_beta); + + Iterator in_it(in, window); + Iterator out_it(out, window); + + /** SIMD vector tag type. */ + using ExactTagType = typename wrapper::traits::neon_bitvector_tag_t<T, wrapper::traits::BitWidth::W128>; + + constexpr int vec_size = 16; + const ITensorInfo *in_info = in->info(); + const ITensorInfo *out_info = out->info(); + const int x_width = in_info->valid_region().shape.x(); + const int in_axis_stride = in_info->strides_in_bytes()[axis]; + const int out_axis_stride = out_info->strides_in_bytes()[axis]; + const int tmp_axis_stride = in_axis_stride; + const int axis_width = in_info->dimension(axis); + const int end_actual = std::min(window[0].end(), x_width); + + execute_window_loop( + window, + [&](const Coordinates &winCoords) + { + const bool vector_exceeds_bounds = ((winCoords[0] + vec_size) > end_actual); + + int num_remaining = (end_actual - winCoords[0]); + int num_remaining_full = num_remaining / 4; + int num_remaining_partial = num_remaining % 4; + + /* Get pointers */ + const uint8_t *in_ptr = in_it.ptr(); + uint8_t *out_ptr = out_it.ptr(); + uint8_t *tmp_ptr = reinterpret_cast<uint8_t *>(tmp); + + auto vec_max = wrapper::vdup_n(support::cpp11::lowest<T>(), ExactTagType{}); + + /* Compute Max */ + { + if (!vector_exceeds_bounds) + { + int i = 0; + for (; i < axis_width; ++i) + { + const auto current_value = + wrapper::vloadq((i * in_axis_stride) + reinterpret_cast<const T *>(in_ptr)); + vec_max = wrapper::vmax(vec_max, current_value); + } + } + else + { + int i = 0; + for (; i < axis_width; ++i) + { + const T *const base_ptr_in = ((i * in_axis_stride) + reinterpret_cast<const T *>(in_ptr)); + int j = 0; + for (; j < num_remaining; ++j) + { + const T current_value = *(base_ptr_in + j); + vec_max[j] = std::max(vec_max[j], current_value); + } + } + } + } // Compute Max + + float32x4x4_t vec_sum_transformed = { + vdupq_n_f32(0.f), + vdupq_n_f32(0.f), + vdupq_n_f32(0.f), + vdupq_n_f32(0.f), + }; + + /* Compute exponentials and sum */ + { + /* Init sum to zero */ + float32x4x4_t vec_sum = vec_sum_transformed; + + auto vec_elements = wrapper::vdup_n(static_cast<T>(0), ExactTagType{}); + + float32x4x4_t vec_elements_flt; + + if (!vector_exceeds_bounds) + { + int i = 0; + for (; i < axis_width; ++i) + { + vec_elements = wrapper::vloadq((i * in_axis_stride) + reinterpret_cast<const T *>(in_ptr)); + vec_elements = wrapper::vqsub(vec_max, vec_elements); + vec_elements_flt = convert_int_to_float<float32x4x4_t>(vec_elements); + + if (IS_LOG) + { + vec_elements_flt.val[0] = vmulq_f32(vec_elements_flt.val[0], scale_beta_vec); + vec_elements_flt.val[1] = vmulq_f32(vec_elements_flt.val[1], scale_beta_vec); + vec_elements_flt.val[2] = vmulq_f32(vec_elements_flt.val[2], scale_beta_vec); + vec_elements_flt.val[3] = vmulq_f32(vec_elements_flt.val[3], scale_beta_vec); + vec_sum.val[0] = vaddq_f32(vec_sum.val[0], vexpq_f32(vec_elements_flt.val[0])); + vec_sum.val[1] = vaddq_f32(vec_sum.val[1], vexpq_f32(vec_elements_flt.val[1])); + vec_sum.val[2] = vaddq_f32(vec_sum.val[2], vexpq_f32(vec_elements_flt.val[2])); + vec_sum.val[3] = vaddq_f32(vec_sum.val[3], vexpq_f32(vec_elements_flt.val[3])); + } + else + { + vec_elements_flt.val[0] = vexpq_f32(vmulq_f32(vec_elements_flt.val[0], scale_beta_vec)); + vec_elements_flt.val[1] = vexpq_f32(vmulq_f32(vec_elements_flt.val[1], scale_beta_vec)); + vec_elements_flt.val[2] = vexpq_f32(vmulq_f32(vec_elements_flt.val[2], scale_beta_vec)); + vec_elements_flt.val[3] = vexpq_f32(vmulq_f32(vec_elements_flt.val[3], scale_beta_vec)); + vec_sum.val[0] = vaddq_f32(vec_sum.val[0], vec_elements_flt.val[0]); + vec_sum.val[1] = vaddq_f32(vec_sum.val[1], vec_elements_flt.val[1]); + vec_sum.val[2] = vaddq_f32(vec_sum.val[2], vec_elements_flt.val[2]); + vec_sum.val[3] = vaddq_f32(vec_sum.val[3], vec_elements_flt.val[3]); + } + vst4q_f32((i * tmp_axis_stride) + reinterpret_cast<float *>(tmp_ptr), vec_elements_flt); + } + + auto vec_256 = wrapper::vdup_n(static_cast<float32_t>(256.f), ExactTagType{}); + if (!IS_LOG) + { + vec_sum_transformed.val[0] = wrapper::vdiv(vec_256, vec_sum.val[0]); + vec_sum_transformed.val[1] = wrapper::vdiv(vec_256, vec_sum.val[1]); + vec_sum_transformed.val[2] = wrapper::vdiv(vec_256, vec_sum.val[2]); + vec_sum_transformed.val[3] = wrapper::vdiv(vec_256, vec_sum.val[3]); + } + else + { + vec_sum_transformed.val[0] = wrapper::vlog(vec_sum.val[0]); + vec_sum_transformed.val[1] = wrapper::vlog(vec_sum.val[1]); + vec_sum_transformed.val[2] = wrapper::vlog(vec_sum.val[2]); + vec_sum_transformed.val[3] = wrapper::vlog(vec_sum.val[3]); + } + } + else + { + int i = 0; + for (; i < axis_width; ++i) + { + const T *const base_ptr_in = (i * in_axis_stride) + reinterpret_cast<const T *>(in_ptr); + auto vec_elements = wrapper::vdup_n(static_cast<T>(0), ExactTagType{}); + //vec_els is functionally redundant but is needed as a workaround for a toolchain bug. + std::vector<T> vec_els(16); + + for (int k = 0; k < num_remaining_full; ++k) + { + for (int j = 0; j < 4; ++j) + { + vec_els[k * 4 + j] = *(base_ptr_in + (4 * k + j)); + } + } + for (int j = 0; j < num_remaining_partial; ++j) + { + vec_els[num_remaining_full * 4 + j] = *(base_ptr_in + (4 * num_remaining_full + j)); + } + for (int q = 0; q < 16; q++) + { + vec_elements[q] = vec_els[q]; + } + vec_elements = wrapper::vqsub(vec_max, vec_elements); + float32x4x4_t vec_elements_flt = convert_int_to_float<float32x4x4_t>(vec_elements); + + if (IS_LOG) + { + vec_elements_flt.val[0] = vmulq_f32(vec_elements_flt.val[0], scale_beta_vec); + vec_elements_flt.val[1] = vmulq_f32(vec_elements_flt.val[1], scale_beta_vec); + vec_elements_flt.val[2] = vmulq_f32(vec_elements_flt.val[2], scale_beta_vec); + vec_elements_flt.val[3] = vmulq_f32(vec_elements_flt.val[3], scale_beta_vec); + vec_sum.val[0] = vaddq_f32(vec_sum.val[0], vexpq_f32(vec_elements_flt.val[0])); + vec_sum.val[1] = vaddq_f32(vec_sum.val[1], vexpq_f32(vec_elements_flt.val[1])); + vec_sum.val[2] = vaddq_f32(vec_sum.val[2], vexpq_f32(vec_elements_flt.val[2])); + vec_sum.val[3] = vaddq_f32(vec_sum.val[3], vexpq_f32(vec_elements_flt.val[3])); + } + else + { + vec_elements_flt.val[0] = vexpq_f32(vmulq_f32(vec_elements_flt.val[0], scale_beta_vec)); + vec_elements_flt.val[1] = vexpq_f32(vmulq_f32(vec_elements_flt.val[1], scale_beta_vec)); + vec_elements_flt.val[2] = vexpq_f32(vmulq_f32(vec_elements_flt.val[2], scale_beta_vec)); + vec_elements_flt.val[3] = vexpq_f32(vmulq_f32(vec_elements_flt.val[3], scale_beta_vec)); + vec_sum.val[0] = vaddq_f32(vec_sum.val[0], vec_elements_flt.val[0]); + vec_sum.val[1] = vaddq_f32(vec_sum.val[1], vec_elements_flt.val[1]); + vec_sum.val[2] = vaddq_f32(vec_sum.val[2], vec_elements_flt.val[2]); + vec_sum.val[3] = vaddq_f32(vec_sum.val[3], vec_elements_flt.val[3]); + } + + float *const base_ptr_tmp = (i * tmp_axis_stride) + reinterpret_cast<float *>(tmp_ptr); + for (int k = 0; k < num_remaining_full; ++k) + { + for (int j = 0; j < 4; ++j) + { + *(base_ptr_tmp + (4 * k + j)) = vec_elements_flt.val[k][j]; + } + } + + for (int j = 0; j < num_remaining_partial; ++j) + { + *(base_ptr_tmp + (4 * num_remaining_full + j)) = + vec_elements_flt.val[num_remaining_full][j]; + } + } + + auto vec_256 = wrapper::vdup_n(static_cast<float32_t>(256), ExactTagType{}); + if (!IS_LOG) + { + vec_sum_transformed.val[0] = wrapper::vdiv(vec_256, vec_sum.val[0]); + vec_sum_transformed.val[1] = wrapper::vdiv(vec_256, vec_sum.val[1]); + vec_sum_transformed.val[2] = wrapper::vdiv(vec_256, vec_sum.val[2]); + vec_sum_transformed.val[3] = wrapper::vdiv(vec_256, vec_sum.val[3]); + } + else + { + vec_sum_transformed.val[0] = wrapper::vlog(vec_sum.val[0]); + vec_sum_transformed.val[1] = wrapper::vlog(vec_sum.val[1]); + vec_sum_transformed.val[2] = wrapper::vlog(vec_sum.val[2]); + vec_sum_transformed.val[3] = wrapper::vlog(vec_sum.val[3]); + } + } + } // Compute exponentials and sum + + /* Normalize exponentials */ + { + constexpr bool is_qasymm8_signed = std::is_same<T, qasymm8_signed_t>::value; + if (!vector_exceeds_bounds) + { + int i = 0; + for (; i < axis_width; ++i) + { + using int_vec_type = wrapper::traits::neon_vector_t<T, 16>; + float32x4x4_t vec_in = vld4q_f32((i * tmp_axis_stride) + reinterpret_cast<float *>(tmp_ptr)); + + int_vec_type normalized_value{}; + + if (IS_LOG) + { + const float32x4x4_t sub = { + vsubq_f32(vec_in.val[0], vec_sum_transformed.val[0]), + vsubq_f32(vec_in.val[1], vec_sum_transformed.val[1]), + vsubq_f32(vec_in.val[2], vec_sum_transformed.val[2]), + vsubq_f32(vec_in.val[3], vec_sum_transformed.val[3]), + }; + normalized_value = convert_float_to_int<float32x4x4_t, int_vec_type>(sub); + } + else + { + float32x4x4_t mul = { + vmulq_f32(vec_in.val[0], vec_sum_transformed.val[0]), + vmulq_f32(vec_in.val[1], vec_sum_transformed.val[1]), + vmulq_f32(vec_in.val[2], vec_sum_transformed.val[2]), + vmulq_f32(vec_in.val[3], vec_sum_transformed.val[3]), + }; + + if (is_qasymm8_signed) + { + const auto offset_vec = wrapper::vdup_n(128.f, wrapper::traits::vector_128_tag{}); + mul.val[0] = wrapper::vsub(mul.val[0], offset_vec); + mul.val[1] = wrapper::vsub(mul.val[1], offset_vec); + mul.val[2] = wrapper::vsub(mul.val[2], offset_vec); + mul.val[3] = wrapper::vsub(mul.val[3], offset_vec); + } + + normalized_value = convert_float_to_int<float32x4x4_t, int_vec_type>(mul); + } + wrapper::vstore((i * out_axis_stride) + reinterpret_cast<T *>(out_ptr), normalized_value); + } + } + else + { + int i = 0; + for (; i < axis_width; ++i) + { + T *const base_ptr_out = (i * out_axis_stride) + reinterpret_cast<T *>(out_ptr); + float *const base_ptr_tmp = (i * tmp_axis_stride) + reinterpret_cast<float *>(tmp_ptr); + if (IS_LOG) + { + for (int k = 0; k < num_remaining_full; ++k) + { + for (int j = 0; j < 4; ++j) + { + *(base_ptr_out + (4 * k + j)) = utils::cast::saturate_cast<T>( + (*(base_ptr_tmp + (4 * k + j)) - vec_sum_transformed.val[k][j])); + } + } + for (int j = 0; j < num_remaining_partial; ++j) + { + *(base_ptr_out + (4 * num_remaining_full + j)) = + utils::cast::saturate_cast<T>(*(base_ptr_tmp + (4 * num_remaining_full + j)) - + vec_sum_transformed.val[num_remaining_full][j]); + } + } + else + { + for (int k = 0; k < num_remaining_full; ++k) + { + for (int j = 0; j < 4; ++j) + { + *(base_ptr_out + (4 * k + j)) = utils::cast::saturate_cast<T>( + *(base_ptr_tmp + (4 * k + j)) * vec_sum_transformed.val[k][j] - + (is_qasymm8_signed ? 128.f : 0)); + } + } + for (int j = 0; j < num_remaining_partial; ++j) + { + *(base_ptr_out + (4 * num_remaining_full + j)) = + utils::cast::saturate_cast<T>(*(base_ptr_tmp + (4 * num_remaining_full + j)) * + vec_sum_transformed.val[num_remaining_full][j] - + (is_qasymm8_signed ? 128.f : 0)); + } + } + } + } + } // Normalize exponentials + }, + in_it, out_it); +} + +template void neon_softmax_x_quantized<qasymm8_signed_t, true>( + const ITensor *in, void *const tmp, ITensor *out, float beta, int axis, const Window &window); + +template void neon_softmax_x_quantized<qasymm8_signed_t, false>( + const ITensor *in, void *const tmp, ITensor *out, float beta, int axis, const Window &window); + +template void neon_softmax_x_quantized<qasymm8_t, true>( + const ITensor *in, void *const tmp, ITensor *out, float beta, int axis, const Window &window); + +template void neon_softmax_x_quantized<qasymm8_t, false>( + const ITensor *in, void *const tmp, ITensor *out, float beta, int axis, const Window &window); + +template void neon_softmax_non_x_quantized<qasymm8_signed_t, true>( + const ITensor *in, void *const tmp, ITensor *out, float beta, int axis, const Window &window); -template void neon_softmax_quantized<qasymm8_signed_t, false>( - const ITensor *in, void *const tmp, ITensor *out, float beta, const Window &window); +template void neon_softmax_non_x_quantized<qasymm8_signed_t, false>( + const ITensor *in, void *const tmp, ITensor *out, float beta, int axis, const Window &window); -template void neon_softmax_quantized<qasymm8_t, true>( - const ITensor *in, void *const tmp, ITensor *out, float beta, const Window &window); +template void neon_softmax_non_x_quantized<qasymm8_t, true>( + const ITensor *in, void *const tmp, ITensor *out, float beta, int axis, const Window &window); -template void neon_softmax_quantized<qasymm8_t, false>( - const ITensor *in, void *const tmp, ITensor *out, float beta, const Window &window); +template void neon_softmax_non_x_quantized<qasymm8_t, false>( + const ITensor *in, void *const tmp, ITensor *out, float beta, int axis, const Window &window); } // namespace cpu } // namespace arm_compute |