1// Copyright 2020 Google LLC 2// 3// This source code is licensed under the BSD-style license found in the 4// LICENSE file in the root directory of this source tree. 5 6$assert BATCH_TILE % 16 == 0 7$assert BATCH_TILE >= 16 8$assert DIV_ALGO in ["div", "nr1fma", "nr1fma1adj"] 9$ABC = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ" 10$SIMD_TILE = BATCH_TILE // 16 11#include <assert.h> 12 13#include <immintrin.h> 14 15#include <xnnpack/common.h> 16#include <xnnpack/intrinsics-polyfill.h> 17#include <xnnpack/vunary.h> 18 19 20void xnn_f32_vsigmoid_ukernel__avx512f_rr2_lut32_p2_perm2_scalef_${DIV_ALGO}_x${BATCH_TILE}( 21 size_t n, 22 const float* x, 23 float* y, 24 const union xnn_f32_sigmoid_params params[restrict XNN_MIN_ELEMENTS(1)]) 25{ 26 assert(n % sizeof(float) == 0); 27 28 const __m512i vsign_mask = _mm512_set1_epi32((int) params->avx512_rr2_lut32_p2.sign_mask); 29 const __m512 vmagic_bias = _mm512_set1_ps(params->avx512_rr2_lut32_p2.magic_bias); 30 const __m512 vlog2e = _mm512_set1_ps(params->avx512_rr2_lut32_p2.log2e); 31 const __m512 vtable_lo = _mm512_load_ps(params->avx512_rr2_lut32_p2.table_lo); 32 const __m512 vtable_hi = _mm512_load_ps(params->avx512_rr2_lut32_p2.table_hi); 33 const __m512 vminus_ln2_hi = _mm512_set1_ps(params->avx512_rr2_lut32_p2.minus_ln2_hi); 34 const __m512 vminus_ln2_lo = _mm512_set1_ps(params->avx512_rr2_lut32_p2.minus_ln2_lo); 35 const __m512 vc2 = _mm512_set1_ps(params->avx512_rr2_lut32_p2.c2); 36 const __m512 vc1 = _mm512_set1_ps(params->avx512_rr2_lut32_p2.c1); 37 const __m512 vone = _mm512_set1_ps(params->avx512_rr2_lut32_p2.one); 38 39 $if BATCH_TILE > 16: 40 for (; n >= ${BATCH_TILE} * sizeof(float); n -= ${BATCH_TILE} * sizeof(float)) { 41 const __m512 vx${ABC[0]} = _mm512_loadu_ps(x); 42 $for N in range(1, SIMD_TILE): 43 const __m512 vx${ABC[N]} = _mm512_loadu_ps(x + ${N * 16}); 44 x += ${BATCH_TILE}; 45 46 $for N in range(SIMD_TILE): 47 const __m512 vz${ABC[N]} = _mm512_castsi512_ps(_mm512_or_epi32(_mm512_castps_si512(vx${ABC[N]}), vsign_mask)); 48 49 $for N in range(SIMD_TILE): 50 __m512 vn${ABC[N]} = _mm512_fmadd_ps(vz${ABC[N]}, vlog2e, vmagic_bias); 51 52 $for N in range(SIMD_TILE): 53 const __m512 vl${ABC[N]} = _mm512_permutex2var_ps(vtable_lo, _mm512_castps_si512(vn${ABC[N]}), vtable_hi); 54 55 $for N in range(SIMD_TILE): 56 vn${ABC[N]} = _mm512_sub_ps(vn${ABC[N]}, vmagic_bias); 57 58 $for N in range(SIMD_TILE): 59 __m512 vt${ABC[N]} = _mm512_fmadd_ps(vn${ABC[N]}, vminus_ln2_hi, vz${ABC[N]}); 60 61 $for N in range(SIMD_TILE): 62 vt${ABC[N]} = _mm512_fmadd_ps(vn${ABC[N]}, vminus_ln2_lo, vt${ABC[N]}); 63 64 $for N in range(SIMD_TILE): 65 __m512 vp${ABC[N]} = _mm512_fmadd_ps(vt${ABC[N]}, vc2, vc1); 66 67 $for N in range(SIMD_TILE): 68 vt${ABC[N]} = _mm512_mul_ps(vt${ABC[N]}, vl${ABC[N]}); 69 70 $for N in range(SIMD_TILE): 71 vp${ABC[N]} = _mm512_fmadd_ps(vt${ABC[N]}, vp${ABC[N]}, vl${ABC[N]}); 72 73 $for N in range(SIMD_TILE): 74 const __m512 ve${ABC[N]} = _mm512_scalef_ps(vp${ABC[N]}, vn${ABC[N]}); 75 76 $for N in range(SIMD_TILE): 77 const __m512 vd${ABC[N]} = _mm512_add_ps(ve${ABC[N]}, vone); 78 79 $if DIV_ALGO == "div": 80 $for N in range(SIMD_TILE): 81 __m512 vf${ABC[N]} = _mm512_div_ps(ve${ABC[N]}, vd${ABC[N]}); 82 $else: 83 $for N in range(SIMD_TILE): 84 __m512 vr${ABC[N]} = _mm512_rcp14_ps(vd${ABC[N]}); 85 86 $for N in range(SIMD_TILE): 87 vr${ABC[N]} = _mm512_fmadd_ps(_mm512_fnmadd_ps(vr${ABC[N]}, vd${ABC[N]}, vone), vr${ABC[N]}, vr${ABC[N]}); 88 89 $for N in range(SIMD_TILE): 90 __m512 vf${ABC[N]} = _mm512_mul_ps(ve${ABC[N]}, vr${ABC[N]}); 91 92 $if DIV_ALGO == "nr1fma1adj": 93 $for N in range(SIMD_TILE): 94 vf${ABC[N]} = _mm512_fmadd_ps(_mm512_fnmadd_ps(vf${ABC[N]}, vd${ABC[N]}, ve${ABC[N]}), vr${ABC[N]}, vf${ABC[N]}); 95 96 $for N in range(SIMD_TILE): 97 vf${ABC[N]} = _mm512_mask_sub_ps(vf${ABC[N]}, _mm512_testn_epi32_mask(_mm512_castps_si512(vx${ABC[N]}), vsign_mask), vone, vf${ABC[N]}); 98 99 _mm512_storeu_ps(y, vf${ABC[0]}); 100 $for N in range(1, SIMD_TILE): 101 _mm512_storeu_ps(y + ${N * 16}, vf${ABC[N]}); 102 y += ${BATCH_TILE}; 103 } 104 for (; n >= 16 * sizeof(float); n -= 16 * sizeof(float)) { 105 const __m512 vx = _mm512_loadu_ps(x); 106 x += 16; 107 108 const __m512 vz = _mm512_castsi512_ps(_mm512_or_epi32(_mm512_castps_si512(vx), vsign_mask)); 109 110 __m512 vn = _mm512_fmadd_ps(vz, vlog2e, vmagic_bias); 111 const __m512 vl = _mm512_permutex2var_ps(vtable_lo, _mm512_castps_si512(vn), vtable_hi); 112 vn = _mm512_sub_ps(vn, vmagic_bias); 113 114 __m512 vt = _mm512_fmadd_ps(vn, vminus_ln2_hi, vz); 115 vt = _mm512_fmadd_ps(vn, vminus_ln2_lo, vt); 116 117 __m512 vp = _mm512_fmadd_ps(vt, vc2, vc1); 118 vt = _mm512_mul_ps(vt, vl); 119 vp = _mm512_fmadd_ps(vt, vp, vl); 120 121 const __m512 ve = _mm512_scalef_ps(vp, vn); 122 const __m512 vd = _mm512_add_ps(ve, vone); 123 124 $if DIV_ALGO == "div": 125 __m512 vf = _mm512_div_ps(ve, vd); 126 $else: 127 __m512 vr = _mm512_rcp14_ps(vd); 128 vr = _mm512_fmadd_ps(_mm512_fnmadd_ps(vr, vd, vone), vr, vr); 129 130 __m512 vf = _mm512_mul_ps(ve, vr); 131 $if DIV_ALGO == "nr1fma1adj": 132 vf = _mm512_fmadd_ps(_mm512_fnmadd_ps(vf, vd, ve), vr, vf); 133 134 vf = _mm512_mask_sub_ps(vf, _mm512_testn_epi32_mask(_mm512_castps_si512(vx), vsign_mask), vone, vf); 135 136 _mm512_storeu_ps(y, vf); 137 y += 16; 138 } 139 if XNN_UNLIKELY(n != 0) { 140 assert(n >= 1 * sizeof(float)); 141 assert(n <= 15 * sizeof(float)); 142 143 // Prepare mask for valid 32-bit elements (depends on n). 144 n >>= 2 /* log2(sizeof(float)) */; 145 const __mmask16 vmask = _cvtu32_mask16((uint16_t) ((uint32_t) (UINT32_C(1) << n) - UINT32_C(1))); 146 147 const __m512 vx = _mm512_maskz_loadu_ps(vmask, x); 148 const __m512 vz = _mm512_castsi512_ps(_mm512_or_epi32(_mm512_castps_si512(vx), vsign_mask)); 149 150 __m512 vn = _mm512_fmadd_ps(vz, vlog2e, vmagic_bias); 151 const __m512 vl = _mm512_permutex2var_ps(vtable_lo, _mm512_castps_si512(vn), vtable_hi); 152 vn = _mm512_sub_ps(vn, vmagic_bias); 153 154 __m512 vt = _mm512_fmadd_ps(vn, vminus_ln2_hi, vz); 155 vt = _mm512_fmadd_ps(vn, vminus_ln2_lo, vt); 156 157 __m512 vp = _mm512_fmadd_ps(vt, vc2, vc1); 158 vt = _mm512_mul_ps(vt, vl); 159 vp = _mm512_fmadd_ps(vt, vp, vl); 160 161 const __m512 ve = _mm512_scalef_ps(vp, vn); 162 const __m512 vd = _mm512_add_ps(ve, vone); 163 164 $if DIV_ALGO == "div": 165 __m512 vf = _mm512_div_ps(ve, vd); 166 $else: 167 __m512 vr = _mm512_rcp14_ps(vd); 168 vr = _mm512_fmadd_ps(_mm512_fnmadd_ps(vr, vd, vone), vr, vr); 169 170 __m512 vf = _mm512_mul_ps(ve, vr); 171 $if DIV_ALGO == "nr1fma1adj": 172 vf = _mm512_fmadd_ps(_mm512_fnmadd_ps(vf, vd, ve), vr, vf); 173 174 vf = _mm512_mask_sub_ps(vf, _mm512_testn_epi32_mask(_mm512_castps_si512(vx), vsign_mask), vone, vf); 175 176 _mm512_mask_storeu_ps(y, vmask, vf); 177 } 178} 179