1 // Auto-generated file. Do not edit!
2 // Template: src/f32-vrnd/vrndd-neon.c.in
3 // Generator: tools/xngen
4 //
5 // Copyright 2020 Google LLC
6 //
7 // This source code is licensed under the BSD-style license found in the
8 // LICENSE file in the root directory of this source tree.
9
10 #include <assert.h>
11
12 #include <arm_neon.h>
13
14 #include <xnnpack/common.h>
15 #include <xnnpack/math.h>
16 #include <xnnpack/vunary.h>
17
18
xnn_f32_vrndd_ukernel__neon_x4(size_t n,const float * x,float * y,const union xnn_f32_rnd_params params[restrict XNN_MIN_ELEMENTS (1)])19 void xnn_f32_vrndd_ukernel__neon_x4(
20 size_t n,
21 const float* x,
22 float* y,
23 const union xnn_f32_rnd_params params[restrict XNN_MIN_ELEMENTS(1)]) XNN_OOB_READS
24 {
25 assert(n != 0);
26 assert(n % sizeof(float) == 0);
27
28 const float32x4_t vintegral_threshold = vreinterpretq_f32_u32(vmovq_n_u32(UINT32_C(0x4B000000)));
29 const uint32x4_t vone = vreinterpretq_u32_f32(vmovq_n_f32(1.0f));
30 for (; n >= 4 * sizeof(float); n -= 4 * sizeof(float)) {
31 const float32x4_t vx0123 = vld1q_f32(x); x += 4;
32
33 const int32x4_t vintx0123 = vcvtq_s32_f32(vx0123);
34
35 uint32x4_t vrndmask0123 = vcaltq_f32(vx0123, vintegral_threshold);
36
37 const float32x4_t vprerndx0123 = vcvtq_f32_s32(vintx0123);
38
39 vrndmask0123 = vbicq_u32(vrndmask0123, vmovq_n_u32(UINT32_C(0x80000000)));
40
41 const float32x4_t vrndx0123 = vbslq_f32(vrndmask0123, vprerndx0123, vx0123);
42
43 const uint32x4_t vadjmask0123 = vcgtq_f32(vrndx0123, vx0123);
44
45 const float32x4_t vadjrndx0123 = vreinterpretq_f32_u32(vandq_u32(vadjmask0123, vone));
46
47 const float32x4_t vy0123 = vsubq_f32(vrndx0123, vadjrndx0123);
48
49 vst1q_f32(y, vy0123); y += 4;
50 }
51 if XNN_UNLIKELY(n != 0) {
52 const float32x4_t vx = vld1q_f32(x);
53 const int32x4_t vintx = vcvtq_s32_f32(vx);
54 uint32x4_t vrndmask = vcaltq_f32(vx, vintegral_threshold);
55 const float32x4_t vprerndx = vcvtq_f32_s32(vintx);
56 vrndmask = vbicq_u32(vrndmask, vmovq_n_u32(UINT32_C(0x80000000)));
57 const float32x4_t vrndx = vbslq_f32(vrndmask, vprerndx, vx);
58 const uint32x4_t vadjmask = vcgtq_f32(vrndx, vx);
59 const float32x4_t vadjrndx = vreinterpretq_f32_u32(vandq_u32(vadjmask, vone));
60 const float32x4_t vy = vsubq_f32(vrndx, vadjrndx);
61 float32x2_t vy_lo = vget_low_f32(vy);
62 if (n & (2 * sizeof(float))) {
63 vst1_f32(y, vy_lo); y += 2;
64 vy_lo = vget_high_f32(vy);
65 }
66 if (n & (1 * sizeof(float))) {
67 vst1_lane_f32(y, vy_lo, 0);
68 }
69 }
70 }
71