-
-
Notifications
You must be signed in to change notification settings - Fork 597
/
paddq.c
58 lines (48 loc) · 2.27 KB
/
paddq.c
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
/* https://github.com/cirosantilli/linux-kernel-module-cheat#gcc-intrinsics */
#include <assert.h>
#include <x86intrin.h>
int main(void) {
/* 32-bit add hello world. */
{
__m128i input0 = _mm_set_epi32(1, 2, 3, 4);
__m128i input1 = _mm_set_epi32(5, 6, 7, 8);
__m128i output = _mm_add_epi32(input0, input1);
/* _mm_extract_epi32 mentioned at:
* https://stackoverflow.com/questions/12495467/how-to-store-the-contents-of-a-m128d-simd-vector-as-doubles-without-accessing/56404421#56404421 */
assert(_mm_extract_epi32(output, 3) == 6);
assert(_mm_extract_epi32(output, 2) == 8);
assert(_mm_extract_epi32(output, 1) == 10);
assert(_mm_extract_epi32(output, 0) == 12);
}
/* Now a bunch of other sizes. */
{
__m128i input0 = _mm_set_epi32(0xF1F1F1F1, 0xF2F2F2F2, 0xF3F3F3F3, 0xF4F4F4F4);
__m128i input1 = _mm_set_epi32(0x12121212, 0x13131313, 0x14141414, 0x15151515);
__m128i output;
/* 8-bit integers (paddb) */
output = _mm_add_epi8(input0, input1);
assert(_mm_extract_epi32(output, 3) == 0x03030303);
assert(_mm_extract_epi32(output, 2) == 0x05050505);
assert(_mm_extract_epi32(output, 1) == 0x07070707);
assert(_mm_extract_epi32(output, 0) == 0x09090909);
/* 32-bit integers (paddw) */
output = _mm_add_epi16(input0, input1);
assert(_mm_extract_epi32(output, 3) == 0x04030403);
assert(_mm_extract_epi32(output, 2) == 0x06050605);
assert(_mm_extract_epi32(output, 1) == 0x08070807);
assert(_mm_extract_epi32(output, 0) == 0x0A090A09);
/* 32-bit integers (paddd) */
output = _mm_add_epi32(input0, input1);
assert(_mm_extract_epi32(output, 3) == 0x04040403);
assert(_mm_extract_epi32(output, 2) == 0x06060605);
assert(_mm_extract_epi32(output, 1) == 0x08080807);
assert(_mm_extract_epi32(output, 0) == 0x0A0A0A09);
/* 64-bit integers (paddq) */
output = _mm_add_epi64(input0, input1);
assert(_mm_extract_epi32(output, 3) == 0x04040404);
assert(_mm_extract_epi32(output, 2) == 0x06060605);
assert(_mm_extract_epi32(output, 1) == 0x08080808);
assert(_mm_extract_epi32(output, 0) == 0x0A0A0A09);
}
return 0;
}