aboutsummaryrefslogtreecommitdiffhomepage
path: root/src/opts/SkUtils_opts_SSE2.cpp
blob: 63e7f2ce6dd86f20e11a81754c34090bad142b1a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69

/*
 * Copyright 2009 The Android Open Source Project
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */


#include <emmintrin.h>
#include "SkUtils_opts_SSE2.h"
 
void sk_memset16_SSE2(uint16_t *dst, uint16_t value, int count)
{
    SkASSERT(dst != NULL && count >= 0);

    // dst must be 2-byte aligned.
    SkASSERT((((size_t) dst) & 0x01) == 0);

    if (count >= 32) {
        while (((size_t)dst) & 0x0F) {
            *dst++ = value;
            --count;
        }
        __m128i *d = reinterpret_cast<__m128i*>(dst);
        __m128i value_wide = _mm_set1_epi16(value);
        while (count >= 32) {
            _mm_store_si128(d++, value_wide);
            _mm_store_si128(d++, value_wide);
            _mm_store_si128(d++, value_wide);
            _mm_store_si128(d++, value_wide);
            count -= 32;
        }
        dst = reinterpret_cast<uint16_t*>(d);
    }
    while (count > 0) {
        *dst++ = value;
        --count;
    }
}
 
void sk_memset32_SSE2(uint32_t *dst, uint32_t value, int count)
{
    SkASSERT(dst != NULL && count >= 0);

    // dst must be 4-byte aligned.
    SkASSERT((((size_t) dst) & 0x03) == 0);

    if (count >= 16) {
        while (((size_t)dst) & 0x0F) {
            *dst++ = value;
            --count;
        }
        __m128i *d = reinterpret_cast<__m128i*>(dst);
        __m128i value_wide = _mm_set1_epi32(value);
        while (count >= 16) {
            _mm_store_si128(d++, value_wide);
            _mm_store_si128(d++, value_wide);
            _mm_store_si128(d++, value_wide);
            _mm_store_si128(d++, value_wide);
            count -= 16;
        }
        dst = reinterpret_cast<uint32_t*>(d);
    }
    while (count > 0) {
        *dst++ = value;
        --count;
    }
}