1 // Auto-generated file. Do not edit!
2 // Template: src/f32-qs8-vcvt/avx.c.in
3 // Generator: tools/xngen
4 //
5 // Copyright 2021 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 <immintrin.h>
13
14 #include <xnnpack/common.h>
15 #include <xnnpack/intrinsics-polyfill.h>
16 #include <xnnpack/vcvt.h>
17
18
xnn_f32_qu8_vcvt_ukernel__avx_x8(size_t n,const float * x,uint8_t * y,const union xnn_f32_qu8_cvt_params params[restrict XNN_MIN_ELEMENTS (1)])19 void xnn_f32_qu8_vcvt_ukernel__avx_x8(
20 size_t n,
21 const float* x,
22 uint8_t* y,
23 const union xnn_f32_qu8_cvt_params params[restrict XNN_MIN_ELEMENTS(1)])
24 {
25 assert(n != 0);
26 assert(n % sizeof(float) == 0);
27 assert(x != NULL);
28 assert(y != NULL);
29
30 const __m256 vscale = _mm256_load_ps(params->avx.scale);
31 const __m256 voutput_max_less_zero_point = _mm256_load_ps(params->avx.output_max_less_zero_point);
32 const __m128i voutput_zero_point = _mm_load_si128((const __m128i*) params->avx.output_zero_point);
33 const __m128i voutput_min = _mm_load_si128((const __m128i*) params->avx.output_min);
34
35 for (; n >= 8 * sizeof(float); n -= 8 * sizeof(float)) {
36 __m256 vx = _mm256_loadu_ps(x);
37 vx = _mm256_mul_ps(vx, vscale);
38 vx = _mm256_min_ps(vx, voutput_max_less_zero_point);
39 x += 8;
40
41 const __m256i vacc = _mm256_cvtps_epi32(vx);
42
43 __m128i vy = _mm_packs_epi32(_mm256_castsi256_si128(vacc), _mm256_extractf128_si256(vacc, 1));
44 vy = _mm_adds_epi16(vy, voutput_zero_point);
45 vy = _mm_packus_epi16(vy, vy);
46 vy = _mm_max_epu8(vy, voutput_min);
47
48 _mm_storel_epi64((__m128i*) y, vy);
49 y += 8;
50 }
51 if XNN_UNLIKELY(n != 0) {
52 assert(n >= 1 * sizeof(float));
53 assert(n <= 7 * sizeof(float));
54 const __m256i vmask = _mm256_loadu_si256((const __m256i*) ((uintptr_t) ¶ms->avx.mask_table[7] - n));
55
56 __m256 vx = _mm256_maskload_ps(x, vmask);
57 vx = _mm256_mul_ps(vx, vscale);
58 vx = _mm256_min_ps(vx, voutput_max_less_zero_point);
59
60 const __m256i vacc = _mm256_cvtps_epi32(vx);
61
62 __m128i vy = _mm_packs_epi32(_mm256_castsi256_si128(vacc), _mm256_extractf128_si256(vacc, 1));
63 vy = _mm_adds_epi16(vy, voutput_zero_point);
64 vy = _mm_packus_epi16(vy, vy);
65 vy = _mm_max_epu8(vy, voutput_min);
66
67 if (n & (4 * sizeof(float))) {
68 _mm_storeu_si32(y, vy);
69 y += 4;
70 vy = _mm_srli_epi64(vy, 32);
71 }
72 if (n & (2 * sizeof(float))) {
73 _mm_storeu_si16(y, vy);
74 y += 2;
75 vy = _mm_srli_epi32(vy, 16);
76 }
77 if (n & (1 * sizeof(float))) {
78 *y = (uint8_t) _mm_extract_epi8(vy, 0);
79 }
80 }
81 }
82