1
2 /*
3 * Copyright 2009 The Android Open Source Project
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8
9
10 #include <emmintrin.h>
11 #include "SkUtils_opts_SSE2.h"
12
sk_memset16_SSE2(uint16_t * dst,uint16_t value,int count)13 void sk_memset16_SSE2(uint16_t *dst, uint16_t value, int count)
14 {
15 SkASSERT(dst != NULL && count >= 0);
16
17 // dst must be 2-byte aligned.
18 SkASSERT((((size_t) dst) & 0x01) == 0);
19
20 if (count >= 32) {
21 while (((size_t)dst) & 0x0F) {
22 *dst++ = value;
23 --count;
24 }
25 __m128i *d = reinterpret_cast<__m128i*>(dst);
26 __m128i value_wide = _mm_set1_epi16(value);
27 while (count >= 32) {
28 _mm_store_si128(d++, value_wide);
29 _mm_store_si128(d++, value_wide);
30 _mm_store_si128(d++, value_wide);
31 _mm_store_si128(d++, value_wide);
32 count -= 32;
33 }
34 dst = reinterpret_cast<uint16_t*>(d);
35 }
36 while (count > 0) {
37 *dst++ = value;
38 --count;
39 }
40 }
41
sk_memset32_SSE2(uint32_t * dst,uint32_t value,int count)42 void sk_memset32_SSE2(uint32_t *dst, uint32_t value, int count)
43 {
44 SkASSERT(dst != NULL && count >= 0);
45
46 // dst must be 4-byte aligned.
47 SkASSERT((((size_t) dst) & 0x03) == 0);
48
49 if (count >= 16) {
50 while (((size_t)dst) & 0x0F) {
51 *dst++ = value;
52 --count;
53 }
54 __m128i *d = reinterpret_cast<__m128i*>(dst);
55 __m128i value_wide = _mm_set1_epi32(value);
56 while (count >= 16) {
57 _mm_store_si128(d++, value_wide);
58 _mm_store_si128(d++, value_wide);
59 _mm_store_si128(d++, value_wide);
60 _mm_store_si128(d++, value_wide);
61 count -= 16;
62 }
63 dst = reinterpret_cast<uint32_t*>(d);
64 }
65 while (count > 0) {
66 *dst++ = value;
67 --count;
68 }
69 }
70