| /* |
| * Copyright (c) 2020-2021 Arm Limited. |
| * |
| * SPDX-License-Identifier: MIT |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to |
| * deal in the Software without restriction, including without limitation the |
| * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or |
| * sell copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in all |
| * copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| */ |
| |
| #include "arm_compute/core/Helpers.h" |
| #include "arm_compute/core/Window.h" |
| #include "src/core/NEON/NEAsymm.h" |
| #include "src/core/NEON/NEMath.h" |
| #include "src/core/NEON/wrapper/wrapper.h" |
| |
| #include <arm_neon.h> |
| #include <cmath> |
| #include <cstddef> |
| |
| namespace arm_compute |
| { |
| namespace cpu |
| { |
| void neon_qasymm8_activation(const ITensor *src, ITensor *dst, const ActivationLayerInfo &act_info, const Window &window) |
| { |
| constexpr int window_step_x = 16; |
| const auto window_start_x = static_cast<int>(window.x().start()); |
| const auto window_end_x = static_cast<int>(window.x().end()); |
| const ActivationLayerInfo::ActivationFunction act = act_info.activation(); |
| |
| Window win_collapsed = window.collapse_if_possible(window, Window::DimZ); |
| win_collapsed.set(Window::DimX, Window::Dimension(0, 1, 1)); |
| |
| Iterator input(src, win_collapsed); |
| Iterator output(dst, win_collapsed); |
| |
| const UniformQuantizationInfo qi_in = src->info()->quantization_info().uniform(); |
| const UniformQuantizationInfo qi_out = dst->info()->quantization_info().uniform(); |
| const qasymm8x16_t va = vdupq_n_u8(quantize_qasymm8(act_info.a(), qi_in)); |
| const qasymm8x16_t vb = vdupq_n_u8(quantize_qasymm8(act_info.b(), qi_in)); |
| const qasymm8_t a = quantize_qasymm8(act_info.a(), qi_in); |
| const qasymm8_t b = quantize_qasymm8(act_info.b(), qi_in); |
| const qasymm8_t const_0 = quantize_qasymm8(0.f, qi_in); |
| const qasymm8x16_t vconst_0 = vdupq_n_u8(const_0); |
| const auto vconst_1 = vdupq_n_f32(1.f); |
| #ifndef __aarch64__ |
| const auto vconst_0_f32 = vdupq_n_f32(0); |
| #endif // __aarch64__ |
| const float32x4_t va_f32 = vdupq_n_f32(act_info.a()); |
| const float32x4_t vb_f32 = vdupq_n_f32(act_info.b()); |
| const float a_f32 = act_info.a(); |
| const float b_f32 = act_info.b(); |
| const auto const_6_f32 = vdupq_n_f32(6.f); |
| const auto const_0_f32 = vdupq_n_f32(0.f); |
| const auto const_3_f32 = vdupq_n_f32(3.f); |
| const auto const_inv_6_f32 = vdupq_n_f32(0.166666667f); |
| |
| // Initialise scale/offset for re-quantization |
| float s = qi_in.scale / qi_out.scale; |
| float o = -qi_in.offset * s + qi_out.offset; |
| float32x4_t vs = vdupq_n_f32(s); |
| float32x4_t vo = vdupq_n_f32(o); |
| |
| execute_window_loop(win_collapsed, [&](const Coordinates &) |
| { |
| const auto input_ptr = reinterpret_cast<const qasymm8_t *>(input.ptr()); |
| const auto output_ptr = reinterpret_cast<qasymm8_t *>(output.ptr()); |
| |
| wrapper::traits::neon_bitvector_t<qasymm8_t, wrapper::traits::BitWidth::W128> tmp; |
| |
| // Compute S elements per iteration |
| int x = window_start_x; |
| for(; x <= (window_end_x - window_step_x); x += window_step_x) |
| { |
| const auto vin = wrapper::vloadq(input_ptr + x); |
| if(act == ActivationLayerInfo::ActivationFunction::RELU) |
| { |
| // Perform activation |
| tmp = vmaxq_u8(vconst_0, vin); |
| // Re-quantize to new output space |
| tmp = vmlaq_qasymm8(tmp, vs, vo); |
| } |
| else if(act == ActivationLayerInfo::ActivationFunction::BOUNDED_RELU) |
| { |
| // Perform activation |
| tmp = vminq_u8(va, vmaxq_u8(vconst_0, vin)); |
| // Re-quantize to new output space |
| tmp = vmlaq_qasymm8(tmp, vs, vo); |
| } |
| else if(act == ActivationLayerInfo::ActivationFunction::LU_BOUNDED_RELU) |
| { |
| // Perform activation |
| tmp = vminq_u8(va, vmaxq_u8(vb, vin)); |
| // Re-quantize to new output space |
| tmp = vmlaq_qasymm8(tmp, vs, vo); |
| } |
| else if(act == ActivationLayerInfo::ActivationFunction::LOGISTIC) |
| { |
| // De-quantize |
| const auto vin_deq = vdequantize(vin, qi_in); |
| // Perform activation |
| const float32x4x4_t tmp_dep = |
| { |
| { |
| wrapper::vdiv(vconst_1, wrapper::vadd(vconst_1, wrapper::vexpq(wrapper::vneg(vin_deq.val[0])))), |
| wrapper::vdiv(vconst_1, wrapper::vadd(vconst_1, wrapper::vexpq(wrapper::vneg(vin_deq.val[1])))), |
| wrapper::vdiv(vconst_1, wrapper::vadd(vconst_1, wrapper::vexpq(wrapper::vneg(vin_deq.val[2])))), |
| wrapper::vdiv(vconst_1, wrapper::vadd(vconst_1, wrapper::vexpq(wrapper::vneg(vin_deq.val[3])))), |
| } |
| }; |
| // Re-quantize to new output space |
| tmp = vquantize(tmp_dep, qi_out); |
| } |
| else if(act == ActivationLayerInfo::ActivationFunction::TANH) |
| { |
| // De-quantize |
| const auto vin_deq = vdequantize(vin, qi_in); |
| // Perform activation |
| const float32x4x4_t tmp_dep = |
| { |
| { |
| wrapper::vmul(va_f32, wrapper::vtanh(wrapper::vmul(vin_deq.val[0], vb_f32))), |
| wrapper::vmul(va_f32, wrapper::vtanh(wrapper::vmul(vin_deq.val[1], vb_f32))), |
| wrapper::vmul(va_f32, wrapper::vtanh(wrapper::vmul(vin_deq.val[2], vb_f32))), |
| wrapper::vmul(va_f32, wrapper::vtanh(wrapper::vmul(vin_deq.val[3], vb_f32))), |
| } |
| }; |
| // Re-quantize to new output space |
| tmp = vquantize(tmp_dep, qi_out); |
| } |
| else if(act == ActivationLayerInfo::ActivationFunction::HARD_SWISH) |
| { |
| // De-quantize |
| const auto vin_deq = vdequantize(vin, qi_in); |
| // Perform activation |
| const float32x4x4_t tmp_dep = |
| { |
| { |
| wrapper::vmul(vin_deq.val[0], wrapper::vmul(const_inv_6_f32, wrapper::vmin(const_6_f32, wrapper::vmax(const_0_f32, wrapper::vadd(vin_deq.val[0], const_3_f32))))), |
| wrapper::vmul(vin_deq.val[1], wrapper::vmul(const_inv_6_f32, wrapper::vmin(const_6_f32, wrapper::vmax(const_0_f32, wrapper::vadd(vin_deq.val[1], const_3_f32))))), |
| wrapper::vmul(vin_deq.val[2], wrapper::vmul(const_inv_6_f32, wrapper::vmin(const_6_f32, wrapper::vmax(const_0_f32, wrapper::vadd(vin_deq.val[2], const_3_f32))))), |
| wrapper::vmul(vin_deq.val[3], wrapper::vmul(const_inv_6_f32, wrapper::vmin(const_6_f32, wrapper::vmax(const_0_f32, wrapper::vadd(vin_deq.val[3], const_3_f32))))), |
| } |
| }; |
| // Re-quantize to new output space |
| tmp = vquantize(tmp_dep, qi_out); |
| } |
| else if(act == ActivationLayerInfo::ActivationFunction::LEAKY_RELU) |
| { |
| const auto vin_deq = vdequantize(vin, qi_in); |
| |
| #ifdef __aarch64__ |
| const uint32x4x4_t pos_mask = |
| { |
| { |
| wrapper::vcgtz(vin_deq.val[0]), |
| wrapper::vcgtz(vin_deq.val[1]), |
| wrapper::vcgtz(vin_deq.val[2]), |
| wrapper::vcgtz(vin_deq.val[3]), |
| } |
| }; |
| #else // __aarch64__ |
| const uint32x4x4_t pos_mask = |
| { |
| { |
| wrapper::vcgt(vin_deq.val[0], vconst_0_f32), |
| wrapper::vcgt(vin_deq.val[1], vconst_0_f32), |
| wrapper::vcgt(vin_deq.val[2], vconst_0_f32), |
| wrapper::vcgt(vin_deq.val[3], vconst_0_f32), |
| } |
| }; |
| #endif // __aarch64__ |
| |
| const float32x4x4_t tmp_dep = |
| { |
| { |
| wrapper::vbsl(pos_mask.val[0], vin_deq.val[0], wrapper::vmul(va_f32, vin_deq.val[0])), |
| wrapper::vbsl(pos_mask.val[1], vin_deq.val[1], wrapper::vmul(va_f32, vin_deq.val[1])), |
| wrapper::vbsl(pos_mask.val[2], vin_deq.val[2], wrapper::vmul(va_f32, vin_deq.val[2])), |
| wrapper::vbsl(pos_mask.val[3], vin_deq.val[3], wrapper::vmul(va_f32, vin_deq.val[3])), |
| } |
| }; |
| |
| tmp = vquantize(tmp_dep, qi_out); |
| } |
| else |
| { |
| ARM_COMPUTE_ERROR("Unsupported activation function"); |
| } |
| wrapper::vstore(output_ptr + x, tmp); |
| } |
| |
| // Compute left-over elements |
| for(; x < window_end_x; ++x) |
| { |
| qasymm8_t in = *(reinterpret_cast<const qasymm8_t *>(input_ptr + x)); |
| qasymm8_t tmp = 0; |
| if(act == ActivationLayerInfo::ActivationFunction::RELU) |
| { |
| tmp = std::max(const_0, in); |
| tmp = utility::clamp<int32_t, qasymm8_t>(tmp * s + o); |
| } |
| else if(act == ActivationLayerInfo::ActivationFunction::BOUNDED_RELU) |
| { |
| tmp = std::min(a, std::max(const_0, in)); |
| tmp = utility::clamp<int32_t, qasymm8_t>(tmp * s + o); |
| } |
| else if(act == ActivationLayerInfo::ActivationFunction::LU_BOUNDED_RELU) |
| { |
| tmp = std::min(a, std::max(b, in)); |
| tmp = utility::clamp<int32_t, qasymm8_t>(tmp * s + o); |
| } |
| else if(act == ActivationLayerInfo::ActivationFunction::LOGISTIC) |
| { |
| float tmp_f = dequantize_qasymm8(in, qi_in); |
| tmp_f = 1.f / (1.f + std::exp(-tmp_f)); |
| tmp = quantize_qasymm8(tmp_f, qi_out); |
| } |
| else if(act == ActivationLayerInfo::ActivationFunction::TANH) |
| { |
| float tmp_f = dequantize_qasymm8(in, qi_in); |
| tmp_f = a_f32 * std::tanh(b_f32 * tmp_f); |
| tmp = quantize_qasymm8(tmp_f, qi_out); |
| } |
| else if(act == ActivationLayerInfo::ActivationFunction::HARD_SWISH) |
| { |
| float tmp_f = dequantize_qasymm8(in, qi_in); |
| tmp_f = tmp_f * ((std::min(std::max((tmp_f + 3), 0.0f), 6.0f)) * 0.166666667f); |
| tmp = quantize_qasymm8(tmp_f, qi_out); |
| } |
| else if(act == ActivationLayerInfo::ActivationFunction::LEAKY_RELU) |
| { |
| float tmp_f = dequantize_qasymm8(in, qi_in); |
| tmp_f = tmp_f > 0 ? tmp_f : tmp_f * a_f32; |
| tmp = quantize_qasymm8(tmp_f, qi_out); |
| } |
| else |
| { |
| ARM_COMPUTE_ERROR("Unsupported activation function"); |
| } |
| *(output_ptr + x) = tmp; |
| } |
| }, |
| input, output); |
| } |
| } // namespace cpu |
| } // namespace arm_compute |
