| /* |
| * Copyright (c) 2017-2019 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. |
| */ |
| #ifndef __ARM_COMPUTE_NEASYMM_H__ |
| #define __ARM_COMPUTE_NEASYMM_H__ |
| |
| #include <arm_neon.h> |
| |
| namespace arm_compute |
| { |
| using qasymm8x8_t = uint8x8_t; /**< 8 bit quantized asymmetric vector with 8 elements */ |
| using qasymm8x8x2_t = uint8x8x2_t; /**< 8 bit quantized asymmetric vector with 16 elements */ |
| using qasymm8x8x3_t = uint8x8x3_t; /**< 8 bit quantized asymmetric vector with 24 elements */ |
| using qasymm8x8x4_t = uint8x8x4_t; /**< 8 bit quantized asymmetric vector with 32 elements */ |
| using qasymm8x16_t = uint8x16_t; /**< 8 bit quantized asymmetric vector with 16 elements */ |
| |
| /** Round to the nearest division by a power-of-two using exponent |
| * |
| * @note This function calculates the following expression: (x + 2^n -1 ) / 2^n where n = exponent |
| * |
| * @param[in] x Vector of 4 elements |
| * @param[in] exponent Integer value used to round to nearest division by a power-of-two |
| * |
| * @return the nearest division by a power-of-two using exponent |
| */ |
| int32x4_t rounding_divide_by_pow2(int32x4_t x, int exponent); |
| |
| /** Perform a multiply-accumulate on all 16 components of a QASYMM8 vector |
| * |
| * vd*vs + vo |
| * |
| * @param[in] vd Input vector value in QASYMM8 format |
| * @param[in] vs Vector multiplier in F32 format. The multiplier value must be duplicated across all four lanes. |
| * @param[in] vo Vector addend in F32 format. The addend value must be duplicated across all four lanes. |
| * |
| * @return A 16-component vector in QASYMM8 format, saturated to fit |
| */ |
| uint8x16_t vmlaq_qasymm8(qasymm8x16_t vd, float32x4_t vs, float32x4_t vo); |
| |
| /** Performs final quantization step on 16 elements |
| * |
| * @tparam is_bounded_relu Specified if a fused bounded relu should be applied |
| * |
| * @param in_s32 Input to be quantized. |
| * @param result_fixedpoint_multiplier Result multiplier parameter |
| * @param result_shift Result shift parameter |
| * @param result_offset_after_shift_s32 Result offset parameter |
| * @param min_u8 Relu lower bound |
| * @param max_u8 Relu upper bound |
| * |
| * @return Quantized values |
| */ |
| template <bool is_bounded_relu> |
| uint8x16_t finalize_quantization(int32x4x4_t &in_s32, |
| int result_fixedpoint_multiplier, |
| int32_t result_shift, |
| int32x4_t result_offset_after_shift_s32, |
| uint8x16_t min_u8, |
| uint8x16_t max_u8) |
| { |
| const static int32x4_t zero_s32 = vdupq_n_s32(0); |
| |
| // Fixed point multiplication with vector saturating rounding doubling multiply high with scalar |
| in_s32.val[0] = vqrdmulhq_n_s32(in_s32.val[0], result_fixedpoint_multiplier); |
| in_s32.val[1] = vqrdmulhq_n_s32(in_s32.val[1], result_fixedpoint_multiplier); |
| in_s32.val[2] = vqrdmulhq_n_s32(in_s32.val[2], result_fixedpoint_multiplier); |
| in_s32.val[3] = vqrdmulhq_n_s32(in_s32.val[3], result_fixedpoint_multiplier); |
| |
| // Round to the nearest division by a power-of-two using result_shift_s32 |
| in_s32.val[0] = rounding_divide_by_pow2(in_s32.val[0], result_shift); |
| in_s32.val[1] = rounding_divide_by_pow2(in_s32.val[1], result_shift); |
| in_s32.val[2] = rounding_divide_by_pow2(in_s32.val[2], result_shift); |
| in_s32.val[3] = rounding_divide_by_pow2(in_s32.val[3], result_shift); |
| |
| // Add the offset terms |
| in_s32.val[0] = vaddq_s32(in_s32.val[0], result_offset_after_shift_s32); |
| in_s32.val[1] = vaddq_s32(in_s32.val[1], result_offset_after_shift_s32); |
| in_s32.val[2] = vaddq_s32(in_s32.val[2], result_offset_after_shift_s32); |
| in_s32.val[3] = vaddq_s32(in_s32.val[3], result_offset_after_shift_s32); |
| |
| // Saturate negative values |
| in_s32.val[0] = vmaxq_s32(in_s32.val[0], zero_s32); |
| in_s32.val[1] = vmaxq_s32(in_s32.val[1], zero_s32); |
| in_s32.val[2] = vmaxq_s32(in_s32.val[2], zero_s32); |
| in_s32.val[3] = vmaxq_s32(in_s32.val[3], zero_s32); |
| |
| // Convert S32 to S16 |
| const int16x8x2_t in_s16 = |
| { |
| { |
| vcombine_s16(vqmovn_s32(in_s32.val[0]), vqmovn_s32(in_s32.val[1])), |
| vcombine_s16(vqmovn_s32(in_s32.val[2]), vqmovn_s32(in_s32.val[3])) |
| } |
| }; |
| |
| // Convert S16 to U8 |
| uint8x16_t out_u8 = vcombine_u8(vqmovun_s16(in_s16.val[0]), vqmovun_s16(in_s16.val[1])); |
| |
| if(is_bounded_relu) |
| { |
| out_u8 = vmaxq_u8(out_u8, min_u8); |
| out_u8 = vminq_u8(out_u8, max_u8); |
| } |
| |
| return out_u8; |
| } |
| |
| /** Dequantize a neon vector holding 16 quantized values. |
| * |
| * @param qv Input values to be dequantized. |
| * @param qi Quantization information to be used in the computation. |
| * |
| * @return Dequantized values in a neon vector |
| */ |
| inline float32x4x4_t vdequantize(const uint8x16_t &qv, const QuantizationInfo &qi) |
| { |
| const float scale = qi.scale; |
| const int offset = qi.offset; |
| const int32x4_t voffset = vdupq_n_s32(offset); |
| const float32x4_t vscale = vdupq_n_f32(scale); |
| const float32x4x4_t vdequantized_input = |
| { |
| { |
| vmulq_f32(vcvtq_f32_s32(vsubq_s32(vreinterpretq_s32_u32(vmovl_u16(vget_low_u16(vmovl_u8(vget_low_u8(qv))))), voffset)), vscale), |
| vmulq_f32(vcvtq_f32_s32(vsubq_s32(vreinterpretq_s32_u32(vmovl_u16(vget_high_u16(vmovl_u8(vget_low_u8(qv))))), voffset)), vscale), |
| vmulq_f32(vcvtq_f32_s32(vsubq_s32(vreinterpretq_s32_u32(vmovl_u16(vget_low_u16(vmovl_u8(vget_high_u8(qv))))), voffset)), vscale), |
| vmulq_f32(vcvtq_f32_s32(vsubq_s32(vreinterpretq_s32_u32(vmovl_u16(vget_high_u16(vmovl_u8(vget_high_u8(qv))))), voffset)), vscale), |
| } |
| }; |
| return vdequantized_input; |
| } |
| |
| /** Quantize a neon vector holding 16 floating point values. |
| * |
| * @param qv Input values to be quantized. |
| * @param qi Quantization information to be used in the computation. |
| * |
| * @return A neon vector holding the quantized values |
| */ |
| inline uint8x16_t vquantize(const float32x4x4_t &qv, const QuantizationInfo &qi) |
| { |
| const float scale = qi.scale; |
| const int offset = qi.offset; |
| const float32x4_t voffset = vdupq_n_f32(offset); |
| const float32x4_t vinvscale = vdupq_n_f32(1.f / scale); |
| const int32x4x4_t rf = |
| { |
| { |
| #ifdef __aarch64__ |
| vcvtnq_s32_f32(vmlaq_f32(voffset, qv.val[0], vinvscale)), |
| vcvtnq_s32_f32(vmlaq_f32(voffset, qv.val[1], vinvscale)), |
| vcvtnq_s32_f32(vmlaq_f32(voffset, qv.val[2], vinvscale)), |
| vcvtnq_s32_f32(vmlaq_f32(voffset, qv.val[3], vinvscale)), |
| #else //__aarch64__ |
| vcvtq_s32_f32(vmlaq_f32(voffset, qv.val[0], vinvscale)), |
| vcvtq_s32_f32(vmlaq_f32(voffset, qv.val[1], vinvscale)), |
| vcvtq_s32_f32(vmlaq_f32(voffset, qv.val[2], vinvscale)), |
| vcvtq_s32_f32(vmlaq_f32(voffset, qv.val[3], vinvscale)), |
| #endif //__aarch64__ |
| } |
| }; |
| const uint8x8_t pa = vqmovun_s16(vcombine_s16(vqmovn_s32(rf.val[0]), vqmovn_s32(rf.val[1]))); |
| const uint8x8_t pb = vqmovun_s16(vcombine_s16(vqmovn_s32(rf.val[2]), vqmovn_s32(rf.val[3]))); |
| return vcombine_u8(pa, pb); |
| } |
| |
| } // namespace arm_compute |
| #include "arm_compute/core/NEON/NEAsymm.inl" |
| #endif // __ARM_COMPUTE_NEASYMM_H__ |