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
|
// run
//go:build !wasm
// Copyright 2021 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// wasm is excluded because the compiler chatter about register abi pragma ends up
// on stdout, and causes the expected output to not match.
package main
import "fmt"
type i4 struct {
a, b, c, d int
}
//go:registerparams
//go:noinline
func F(x i4) i4 {
ab := x.a + x.b
bc := x.b + x.c
cd := x.c + x.d
ad := x.a + x.d
ba := x.a - x.b
cb := x.b - x.c
dc := x.c - x.d
da := x.a - x.d
return i4{ab*bc + da, cd*ad + cb, ba*cb + ad, dc*da + bc}
}
func main() {
x := i4{1, 2, 3, 4}
y := x
z := F(x)
if (i4{12, 34, 6, 8}) != z {
fmt.Printf("y=%v, z=%v\n", y, z)
}
}
|
