1 // Auto-generated file. Do not edit!
2 // Template: src/qs8-vcvt/avx2.c.in
3 // Generator: tools/xngen
4 //
5 // Copyright 2022 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_qu8_vcvt_ukernel__avx2_x16(size_t n,const uint8_t * x,uint8_t * y,const union xnn_qu8_cvt_params params[restrict XNN_MIN_ELEMENTS (1)])19 void xnn_qu8_vcvt_ukernel__avx2_x16(
20 size_t n,
21 const uint8_t* x,
22 uint8_t* y,
23 const union xnn_qu8_cvt_params params[restrict XNN_MIN_ELEMENTS(1)]) XNN_OOB_READS
24 {
25 assert(n != 0);
26 assert(n % sizeof(uint8_t) == 0);
27 assert(x != NULL);
28 assert(y != NULL);
29
30 const __m256i vinput_zero_point = _mm256_load_si256((const __m256i*) params->avx2.input_zero_point);
31 const __m256i vmultiplier = _mm256_load_si256((const __m256i*) params->avx2.multiplier);
32 const __m256i voutput_zero_point = _mm256_load_si256((const __m256i*) params->avx2.output_zero_point);
33 for (; n >= 16 * sizeof(uint8_t); n -= 16 * sizeof(uint8_t)) {
34 __m256i vacc = _mm256_cvtepu8_epi16(_mm_loadu_si128((const __m128i*) x));
35 vacc = _mm256_sub_epi16(vinput_zero_point, vacc);
36 vacc = _mm256_slli_epi16(vacc, 7);
37 vacc = _mm256_mulhrs_epi16(vacc, vmultiplier);
38 vacc = _mm256_adds_epi16(vacc, voutput_zero_point);
39 x += 16;
40
41 const __m128i vacc_hi = _mm256_extracti128_si256(vacc, 1);
42 const __m128i vy = _mm_packus_epi16(_mm256_castsi256_si128(vacc), vacc_hi);
43 _mm_storeu_si128((__m128i*) y, vy);
44 y += 16;
45 }
46 if XNN_UNLIKELY(n != 0) {
47 assert(n >= 1 * sizeof(uint8_t));
48 assert(n <= 15 * sizeof(uint8_t));
49
50 __m256i vacc = _mm256_cvtepu8_epi16(_mm_loadu_si128((const __m128i*) x));
51 vacc = _mm256_sub_epi16(vinput_zero_point, vacc);
52 vacc = _mm256_slli_epi16(vacc, 7);
53 vacc = _mm256_mulhrs_epi16(vacc, vmultiplier);
54 vacc = _mm256_adds_epi16(vacc, voutput_zero_point);
55
56 const __m128i vacc_hi = _mm256_extracti128_si256(vacc, 1);
57 __m128i vy = _mm_packus_epi16(_mm256_castsi256_si128(vacc), vacc_hi);
58 if (n & (8 * sizeof(uint8_t))) {
59 _mm_storel_epi64((__m128i*) y, vy);
60 vy = _mm_unpackhi_epi64(vy, vy);
61 y += 8;
62 }
63 if (n & (4 * sizeof(uint8_t))) {
64 _mm_storeu_si32(y, vy);
65 vy = _mm_srli_epi64(vy, 32);
66 y += 4;
67 }
68 if (n & (2 * sizeof(uint8_t))) {
69 _mm_storeu_si16(y, vy);
70 vy = _mm_srli_epi32(vy, 16);
71 y += 2;
72 }
73 if (n & (1 * sizeof(uint8_t))) {
74 *y = (uint8_t) _mm_extract_epi8(vy, 0);
75 }
76 }
77 }
78