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
|
std::pair<const char *, char32_t *>
lsx_convert_latin1_to_utf32(const char *buf, size_t len,
char32_t *utf32_output) {
const char *end = buf + len;
while (buf + 16 <= end) {
__m128i in8 = __lsx_vld(reinterpret_cast<const uint8_t *>(buf), 0);
__m128i zero = __lsx_vldi(0);
__m128i in16low = __lsx_vilvl_b(zero, in8);
__m128i in16high = __lsx_vilvh_b(zero, in8);
__m128i in32_0 = __lsx_vilvl_h(zero, in16low);
__m128i in32_1 = __lsx_vilvh_h(zero, in16low);
__m128i in32_2 = __lsx_vilvl_h(zero, in16high);
__m128i in32_3 = __lsx_vilvh_h(zero, in16high);
__lsx_vst(in32_0, reinterpret_cast<uint32_t *>(utf32_output), 0);
__lsx_vst(in32_1, reinterpret_cast<uint32_t *>(utf32_output + 4), 0);
__lsx_vst(in32_2, reinterpret_cast<uint32_t *>(utf32_output + 8), 0);
__lsx_vst(in32_3, reinterpret_cast<uint32_t *>(utf32_output + 12), 0);
utf32_output += 16;
buf += 16;
}
return std::make_pair(buf, utf32_output);
}
|
