| // Auto-generated file. Do not edit! |
| // Template: src/f32-qs8-vcvt/neon.c.in |
| // Generator: tools/xngen |
| // |
| // 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. |
| |
| #include <assert.h> |
| |
| #include <arm_neon.h> |
| |
| #include <xnnpack/common.h> |
| #include <xnnpack/intrinsics-polyfill.h> |
| #include <xnnpack/vcvt.h> |
| |
| |
| void xnn_f32_qu8_vcvt_ukernel__neon_x8( |
| size_t n, |
| const float* x, |
| uint8_t* y, |
| const union xnn_f32_qu8_cvt_params params[restrict XNN_MIN_ELEMENTS(1)]) XNN_OOB_READS |
| { |
| assert(n != 0); |
| assert(n % sizeof(float) == 0); |
| assert(x != NULL); |
| assert(y != NULL); |
| |
| const float32x4_t vscale = vld1q_dup_f32(¶ms->neon.scale); |
| const float32x4_t vmagic_bias = vld1q_dup_f32(¶ms->neon.magic_bias); |
| const int32x4_t vmagic_bias_less_zero_point = vld1q_dup_s32(¶ms->neon.magic_bias_less_zero_point); |
| const uint8x8_t voutput_min = vld1_dup_u8(¶ms->neon.output_min); |
| const uint8x8_t voutput_max = vld1_dup_u8(¶ms->neon.output_max); |
| for (; n >= 8 * sizeof(float); n -= 8 * sizeof(float)) { |
| float32x4_t vx_lo = vld1q_f32(x); x += 4; |
| float32x4_t vx_hi = vld1q_f32(x); x += 4; |
| |
| vx_lo = vmulq_f32(vx_lo, vscale); |
| vx_hi = vmulq_f32(vx_hi, vscale); |
| |
| vx_lo = vaddq_f32(vx_lo, vmagic_bias); |
| vx_hi = vaddq_f32(vx_hi, vmagic_bias); |
| |
| const int32x4_t vacc_lo = vqsubq_s32(vreinterpretq_s32_f32(vx_lo), vmagic_bias_less_zero_point); |
| const int32x4_t vacc_hi = vqsubq_s32(vreinterpretq_s32_f32(vx_hi), vmagic_bias_less_zero_point); |
| |
| const int16x8_t vacc = vcombine_s16(vqmovn_s32(vacc_lo), vqmovn_s32(vacc_hi)); |
| |
| uint8x8_t vy = vqmovun_s16(vacc); |
| vy = vmax_u8(vy, voutput_min); |
| vy = vmin_u8(vy, voutput_max); |
| vst1_u8(y, vy); y += 8; |
| } |
| if XNN_UNLIKELY(n != 0) { |
| assert(n >= 1 * sizeof(float)); |
| assert(n <= 7 * sizeof(float)); |
| float32x4_t vx_lo = vld1q_f32(x); |
| const float* x_hi = (const float*) ((uintptr_t) x + (n & (4 * sizeof(float)))); |
| float32x4_t vx_hi = vld1q_f32(x_hi); |
| |
| vx_lo = vmulq_f32(vx_lo, vscale); |
| vx_hi = vmulq_f32(vx_hi, vscale); |
| |
| vx_lo = vaddq_f32(vx_lo, vmagic_bias); |
| vx_hi = vaddq_f32(vx_hi, vmagic_bias); |
| |
| const int32x4_t vacc_lo = vqsubq_s32(vreinterpretq_s32_f32(vx_lo), vmagic_bias_less_zero_point); |
| const int32x4_t vacc_hi = vqsubq_s32(vreinterpretq_s32_f32(vx_hi), vmagic_bias_less_zero_point); |
| |
| const int16x8_t vacc = vcombine_s16(vqmovn_s32(vacc_lo), vqmovn_s32(vacc_hi)); |
| |
| uint8x8_t vy = vqmovun_s16(vacc); |
| vy = vmax_u8(vy, voutput_min); |
| vy = vmin_u8(vy, voutput_max); |
| |
| if (n & (4 * sizeof(float))) { |
| vst1_lane_u32((void*) y, vreinterpret_u32_u8(vy), 0); y += 4; |
| vy = vext_u8(vy, vy, 4); |
| } |
| if (n & (2 * sizeof(float))) { |
| vst1_lane_u16((void*) y, vreinterpret_u16_u8(vy), 0); y += 2; |
| vy = vext_u8(vy, vy, 2); |
| } |
| if (n & (1 * sizeof(float))) { |
| vst1_lane_u8(y, vy, 0); |
| } |
| } |
| } |