Marat Dukhan | ed6baaf | 2020-12-01 15:07:08 -0800 | [diff] [blame^] | 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 % 4 == 0 |
| 7 | $assert BATCH_TILE >= 4 |
| 8 | $ABC = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ" |
| 9 | #include <assert.h> |
| 10 | |
| 11 | #include <wasm_simd128.h> |
| 12 | |
| 13 | #include <xnnpack/vunary.h> |
| 14 | #include <xnnpack/common.h> |
| 15 | |
| 16 | |
| 17 | void xnn_f32_velu_ukernel__wasmsimd_${"x86" if X86 else "arm"}_rr2_p6_x${BATCH_TILE}( |
| 18 | size_t n, |
| 19 | const float* x, |
| 20 | float* y, |
| 21 | const union xnn_f32_elu_params params[restrict XNN_MIN_ELEMENTS(1)]) XNN_DISABLE_TSAN |
| 22 | { |
| 23 | assert(n != 0); |
| 24 | assert(n % sizeof(float) == 0); |
| 25 | assert(x != NULL); |
| 26 | assert(y != NULL); |
| 27 | |
| 28 | const v128_t vprescale = wasm_v32x4_load_splat(¶ms->scalar.prescale); |
| 29 | const v128_t valpha = wasm_v32x4_load_splat(¶ms->scalar.alpha); |
| 30 | const v128_t vbeta = wasm_v32x4_load_splat(¶ms->scalar.beta); |
| 31 | |
| 32 | const v128_t vsat_cutoff = wasm_f32x4_splat(-0x1.154246p+4f); |
| 33 | const v128_t vmagic_bias = wasm_f32x4_splat(0x1.8000FEp23f); |
| 34 | const v128_t vlog2e = wasm_f32x4_splat(0x1.715476p+0f); |
| 35 | const v128_t vminus_ln2_hi = wasm_f32x4_splat(-0x1.62E440p-1f); |
| 36 | const v128_t vminus_ln2_lo = wasm_f32x4_splat(0x1.0105C6p-21f); |
| 37 | const v128_t vc6 = wasm_f32x4_splat(0x1.6b7338p-10f); |
| 38 | const v128_t vc5 = wasm_f32x4_splat(0x1.12278Ep-7f); |
| 39 | const v128_t vc4 = wasm_f32x4_splat(0x1.555716p-5f); |
| 40 | const v128_t vc3 = wasm_f32x4_splat(0x1.5554B0p-3f); |
| 41 | const v128_t vc2 = wasm_f32x4_splat(0x1.FFFFFEp-2f); |
| 42 | const v128_t vone = wasm_f32x4_splat(1.0f); |
| 43 | |
| 44 | $if BATCH_TILE > 4: |
| 45 | for (; n >= ${BATCH_TILE} * sizeof(float); n -= ${BATCH_TILE} * sizeof(float)) { |
| 46 | v128_t vx${ABC[0:4]} = wasm_v128_load(x); |
| 47 | $for N in range(4, BATCH_TILE, 4): |
| 48 | v128_t vx${ABC[N:N+4]} = wasm_v128_load(x + ${N}); |
| 49 | x += ${BATCH_TILE}; |
| 50 | |
| 51 | $for N in range(0, BATCH_TILE, 4): |
| 52 | $if X86: |
| 53 | const v128_t vz${ABC[N:N+4]} = wasm_f32x4_mul(vx${ABC[N:N+4]}, vprescale); |
| 54 | $else: |
| 55 | const v128_t vz${ABC[N:N+4]} = wasm_f32x4_max(wasm_f32x4_mul(vx${ABC[N:N+4]}, vprescale), vsat_cutoff); |
| 56 | |
| 57 | $for N in range(0, BATCH_TILE, 4): |
| 58 | v128_t vn${ABC[N:N+4]} = wasm_f32x4_add(wasm_f32x4_mul(vz${ABC[N:N+4]}, vlog2e), vmagic_bias); |
| 59 | |
| 60 | $for N in range(0, BATCH_TILE, 4): |
| 61 | v128_t vs${ABC[N:N+4]} = wasm_i32x4_shl(vn${ABC[N:N+4]}, 23); |
| 62 | |
| 63 | $for N in range(0, BATCH_TILE, 4): |
| 64 | vn${ABC[N:N+4]} = wasm_f32x4_sub(vn${ABC[N:N+4]}, vmagic_bias); |
| 65 | |
| 66 | $if X86: |
| 67 | $for N in range(0, BATCH_TILE, 4): |
| 68 | vs${ABC[N:N+4]} = wasm_v128_andnot(vs${ABC[N:N+4]}, wasm_f32x4_le(vz${ABC[N:N+4]}, vsat_cutoff)); |
| 69 | |
| 70 | $for N in range(0, BATCH_TILE, 4): |
| 71 | v128_t vt${ABC[N:N+4]} = wasm_f32x4_add(wasm_f32x4_mul(vn${ABC[N:N+4]}, vminus_ln2_hi), vz${ABC[N:N+4]}); |
| 72 | |
| 73 | $for N in range(0, BATCH_TILE, 4): |
| 74 | vt${ABC[N:N+4]} = wasm_f32x4_add(wasm_f32x4_mul(vn${ABC[N:N+4]}, vminus_ln2_lo), vt${ABC[N:N+4]}); |
| 75 | |
| 76 | $for N in range(0, BATCH_TILE, 4): |
| 77 | v128_t vp${ABC[N:N+4]} = wasm_f32x4_add(wasm_f32x4_mul(vc6, vt${ABC[N:N+4]}), vc5); |
| 78 | |
| 79 | $for N in range(0, BATCH_TILE, 4): |
| 80 | vp${ABC[N:N+4]} = wasm_f32x4_add(wasm_f32x4_mul(vp${ABC[N:N+4]}, vt${ABC[N:N+4]}), vc4); |
| 81 | |
| 82 | $for N in range(0, BATCH_TILE, 4): |
| 83 | vp${ABC[N:N+4]} = wasm_f32x4_add(wasm_f32x4_mul(vp${ABC[N:N+4]}, vt${ABC[N:N+4]}), vc3); |
| 84 | |
| 85 | $for N in range(0, BATCH_TILE, 4): |
| 86 | vp${ABC[N:N+4]} = wasm_f32x4_add(wasm_f32x4_mul(vp${ABC[N:N+4]}, vt${ABC[N:N+4]}), vc2); |
| 87 | |
| 88 | $for N in range(0, BATCH_TILE, 4): |
| 89 | vp${ABC[N:N+4]} = wasm_f32x4_mul(vp${ABC[N:N+4]}, vt${ABC[N:N+4]}); |
| 90 | |
| 91 | $for N in range(0, BATCH_TILE, 4): |
| 92 | vt${ABC[N:N+4]} = wasm_f32x4_mul(vt${ABC[N:N+4]}, vs${ABC[N:N+4]}); |
| 93 | vs${ABC[N:N+4]} = wasm_f32x4_sub(vs${ABC[N:N+4]}, vone); |
| 94 | |
| 95 | $for N in range(0, BATCH_TILE, 4): |
| 96 | vp${ABC[N:N+4]} = wasm_f32x4_add(wasm_f32x4_mul(vp${ABC[N:N+4]}, vt${ABC[N:N+4]}), vt${ABC[N:N+4]}); |
| 97 | |
| 98 | $for N in range(0, BATCH_TILE, 4): |
| 99 | const v128_t ve${ABC[N:N+4]} = wasm_f32x4_mul(wasm_f32x4_add(vp${ABC[N:N+4]}, vs${ABC[N:N+4]}), valpha); |
| 100 | |
| 101 | $for N in range(0, BATCH_TILE, 4): |
| 102 | const v128_t vm${ABC[N:N+4]} = wasm_i32x4_shr(vx${ABC[N:N+4]}, 31); |
| 103 | vx${ABC[N:N+4]} = wasm_f32x4_mul(vx${ABC[N:N+4]}, vbeta); |
| 104 | |
| 105 | $for N in range(0, BATCH_TILE, 4): |
| 106 | const v128_t vy${ABC[N:N+4]} = wasm_v128_bitselect(ve${ABC[N:N+4]}, vx${ABC[N:N+4]}, vm${ABC[N:N+4]}); |
| 107 | |
| 108 | wasm_v128_store(y, vy${ABC[0:4]}); |
| 109 | $for N in range(4, BATCH_TILE, 4): |
| 110 | wasm_v128_store(y + ${N}, vy${ABC[N:N+4]}); |
| 111 | y += ${BATCH_TILE}; |
| 112 | } |
| 113 | for (; n >= 4 * sizeof(float); n -= 4 * sizeof(float)) { |
| 114 | v128_t vx = wasm_v128_load(x); |
| 115 | x += 4; |
| 116 | |
| 117 | $if X86: |
| 118 | const v128_t vz = wasm_f32x4_mul(vx, vprescale); |
| 119 | $else: |
| 120 | const v128_t vz = wasm_f32x4_max(wasm_f32x4_mul(vx, vprescale), vsat_cutoff); |
| 121 | |
| 122 | v128_t vn = wasm_f32x4_add(wasm_f32x4_mul(vz, vlog2e), vmagic_bias); |
| 123 | v128_t vs = wasm_i32x4_shl(vn, 23); |
| 124 | vn = wasm_f32x4_sub(vn, vmagic_bias); |
| 125 | $if X86: |
| 126 | vs = wasm_v128_andnot(vs, wasm_f32x4_le(vz, vsat_cutoff)); |
| 127 | |
| 128 | v128_t vt = wasm_f32x4_add(wasm_f32x4_mul(vn, vminus_ln2_hi), vz); |
| 129 | vt = wasm_f32x4_add(wasm_f32x4_mul(vn, vminus_ln2_lo), vt); |
| 130 | |
| 131 | v128_t vp = wasm_f32x4_add(wasm_f32x4_mul(vc6, vt), vc5); |
| 132 | vp = wasm_f32x4_add(wasm_f32x4_mul(vp, vt), vc4); |
| 133 | vp = wasm_f32x4_add(wasm_f32x4_mul(vp, vt), vc3); |
| 134 | vp = wasm_f32x4_add(wasm_f32x4_mul(vp, vt), vc2); |
| 135 | vp = wasm_f32x4_mul(vp, vt); |
| 136 | |
| 137 | vt = wasm_f32x4_mul(vt, vs); |
| 138 | vs = wasm_f32x4_sub(vs, vone); |
| 139 | vp = wasm_f32x4_add(wasm_f32x4_mul(vp, vt), vt); |
| 140 | const v128_t ve = wasm_f32x4_mul(wasm_f32x4_add(vp, vs), valpha); |
| 141 | |
| 142 | const v128_t vm = wasm_i32x4_shr(vx, 31); |
| 143 | vx = wasm_f32x4_mul(vx, vbeta); |
| 144 | const v128_t vy = wasm_v128_bitselect(ve, vx, vm); |
| 145 | |
| 146 | wasm_v128_store(y, vy); |
| 147 | y += 4; |
| 148 | } |
| 149 | if XNN_UNLIKELY(n != 0) { |
| 150 | v128_t vx = wasm_v128_load(x); |
| 151 | |
| 152 | $if X86: |
| 153 | const v128_t vz = wasm_f32x4_mul(vx, vprescale); |
| 154 | $else: |
| 155 | const v128_t vz = wasm_f32x4_max(wasm_f32x4_mul(vx, vprescale), vsat_cutoff); |
| 156 | |
| 157 | v128_t vn = wasm_f32x4_add(wasm_f32x4_mul(vz, vlog2e), vmagic_bias); |
| 158 | v128_t vs = wasm_i32x4_shl(vn, 23); |
| 159 | vn = wasm_f32x4_sub(vn, vmagic_bias); |
| 160 | $if X86: |
| 161 | vs = wasm_v128_andnot(vs, wasm_f32x4_le(vz, vsat_cutoff)); |
| 162 | |
| 163 | v128_t vt = wasm_f32x4_add(wasm_f32x4_mul(vn, vminus_ln2_hi), vz); |
| 164 | vt = wasm_f32x4_add(wasm_f32x4_mul(vn, vminus_ln2_lo), vt); |
| 165 | |
| 166 | v128_t vp = wasm_f32x4_add(wasm_f32x4_mul(vc6, vt), vc5); |
| 167 | vp = wasm_f32x4_add(wasm_f32x4_mul(vp, vt), vc4); |
| 168 | vp = wasm_f32x4_add(wasm_f32x4_mul(vp, vt), vc3); |
| 169 | vp = wasm_f32x4_add(wasm_f32x4_mul(vp, vt), vc2); |
| 170 | vp = wasm_f32x4_mul(vp, vt); |
| 171 | |
| 172 | vt = wasm_f32x4_mul(vt, vs); |
| 173 | vs = wasm_f32x4_sub(vs, vone); |
| 174 | vp = wasm_f32x4_add(wasm_f32x4_mul(vp, vt), vt); |
| 175 | const v128_t ve = wasm_f32x4_mul(wasm_f32x4_add(vp, vs), valpha); |
| 176 | |
| 177 | const v128_t vm = wasm_i32x4_shr(vx, 31); |
| 178 | vx = wasm_f32x4_mul(vx, vbeta); |
| 179 | v128_t vy = wasm_v128_bitselect(ve, vx, vm); |
| 180 | |
| 181 | if (n & (2 * sizeof(float))) { |
| 182 | *((double*) y) = wasm_f64x2_extract_lane(vy, 0); |
| 183 | vy = wasm_v32x4_shuffle(vy, vy, 2, 3, 2, 3); |
| 184 | y += 2; |
| 185 | } |
| 186 | if (n & (1 * sizeof(float))) { |
| 187 | *y = wasm_f32x4_extract_lane(vy, 0); |
| 188 | } |
| 189 | } |
| 190 | } |