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$ABC = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
9#include <assert.h>
10
11#include <wasm_simd128.h>
12
13#include <xnnpack/common.h>
14#include <xnnpack/math.h>
15#include <xnnpack/vunary.h>
16
17
18void xnn_f32_vrndu_ukernel__wasmsimd_cvt_x${BATCH_TILE}(
19    size_t n,
20    const float* x,
21    float* y,
22    const union xnn_f32_rnd_params params[restrict XNN_MIN_ELEMENTS(1)]) XNN_DISABLE_TSAN
23{
24  assert(n != 0);
25  assert(n % sizeof(float) == 0);
26
27  const v128_t vsign_mask = wasm_f32x4_splat(-0.0f);
28  const v128_t vmagic_number = wasm_f32x4_splat(0x1.000000p+23f);
29  const v128_t vone = wasm_f32x4_splat(1.0f);
30  $if BATCH_TILE > 4:
31    for (; n >= ${BATCH_TILE} * sizeof(float); n -= ${BATCH_TILE} * sizeof(float)) {
32      const v128_t vx${ABC[0:4]} = wasm_v128_load(x);
33      $for N in range(4, BATCH_TILE, 4):
34        const v128_t vx${ABC[N:N+4]} = wasm_v128_load(x + ${N});
35      x += ${BATCH_TILE};
36
37      $for N in range(0, BATCH_TILE, 4):
38        const v128_t vintx${ABC[N:N+4]} = wasm_i32x4_trunc_saturate_f32x4(vx${ABC[N:N+4]});
39        const v128_t vabsx${ABC[N:N+4]} = wasm_f32x4_abs(vx${ABC[N:N+4]});
40
41      $for N in range(0, BATCH_TILE, 4):
42        const v128_t vprerndx${ABC[N:N+4]} = wasm_f32x4_convert_i32x4(vintx${ABC[N:N+4]});
43        const v128_t vrndmask${ABC[N:N+4]} = wasm_v128_andnot(wasm_f32x4_lt(vabsx${ABC[N:N+4]}, vmagic_number), vsign_mask);
44
45      $for N in range(0, BATCH_TILE, 4):
46        const v128_t vrndx${ABC[N:N+4]} = wasm_v128_bitselect(vprerndx${ABC[N:N+4]}, vx${ABC[N:N+4]}, vrndmask${ABC[N:N+4]});
47
48      $for N in range(0, BATCH_TILE, 4):
49        const v128_t vadjmask${ABC[N:N+4]} = wasm_v128_or(vsign_mask, wasm_f32x4_le(vx${ABC[N:N+4]}, vrndx${ABC[N:N+4]}));
50
51      $for N in range(0, BATCH_TILE, 4):
52        const v128_t vadjrndx${ABC[N:N+4]} = wasm_f32x4_add(vrndx${ABC[N:N+4]}, vone);
53
54      $for N in range(0, BATCH_TILE, 4):
55        const v128_t vy${ABC[N:N+4]} = wasm_v128_bitselect(vrndx${ABC[N:N+4]}, vadjrndx${ABC[N:N+4]}, vadjmask${ABC[N:N+4]});
56
57      wasm_v128_store(y, vy${ABC[0:4]});
58      $for N in range(4, BATCH_TILE, 4):
59        wasm_v128_store(y + ${N}, vy${ABC[N:N+4]});
60      y += ${BATCH_TILE};
61    }
62  for (; n >= 4 * sizeof(float); n -= 4 * sizeof(float)) {
63    const v128_t vx = wasm_v128_load(x);
64    x += 4;
65
66    const v128_t vintx = wasm_i32x4_trunc_saturate_f32x4(vx);
67    const v128_t vabsx = wasm_f32x4_abs(vx);
68    const v128_t vprerndx = wasm_f32x4_convert_i32x4(vintx);
69    const v128_t vrndmask = wasm_v128_andnot(wasm_f32x4_lt(vabsx, vmagic_number), vsign_mask);
70    const v128_t vrndx = wasm_v128_bitselect(vprerndx, vx, vrndmask);
71    const v128_t vadjmask = wasm_v128_or(vsign_mask, wasm_f32x4_le(vx, vrndx));
72    const v128_t vadjrndx = wasm_f32x4_add(vrndx, vone);
73    const v128_t vy = wasm_v128_bitselect(vrndx, vadjrndx, vadjmask);
74
75    wasm_v128_store(y, vy);
76    y += 4;
77  }
78  if XNN_UNLIKELY(n != 0) {
79    const v128_t vx = wasm_v128_load(x);
80
81    const v128_t vintx = wasm_i32x4_trunc_saturate_f32x4(vx);
82    const v128_t vabsx = wasm_f32x4_abs(vx);
83    const v128_t vprerndx = wasm_f32x4_convert_i32x4(vintx);
84    const v128_t vrndmask = wasm_v128_andnot(wasm_f32x4_lt(vabsx, vmagic_number), vsign_mask);
85    const v128_t vrndx = wasm_v128_bitselect(vprerndx, vx, vrndmask);
86    const v128_t vadjmask = wasm_v128_or(vsign_mask, wasm_f32x4_le(vx, vrndx));
87    const v128_t vadjrndx = wasm_f32x4_add(vrndx, vone);
88    v128_t vy = wasm_v128_bitselect(vrndx, vadjrndx, vadjmask);
89
90    if (n & (2 * sizeof(float))) {
91      *((double*) y) = wasm_f64x2_extract_lane(vy, 0);
92      vy = wasm_v32x4_shuffle(vy, vy, 2, 3, 2, 3);
93      y += 2;
94    }
95    if (n & (1 * sizeof(float))) {
96      *y = wasm_f32x4_extract_lane(vy, 0);
97    }
98  }
99}
100