blob: 13a7ff1e1cb2a1aa886d74022d3bf323304d1fa8 (
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
|
// Copyright 2022 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.
package main
import (
"fmt"
"os"
)
//go:noinline
func f(x float64) float64 {
return x
}
func inlineFma(x, y, z float64) float64 {
return x + y*z
}
func main() {
w, x, y := 1.0, 1.0, 1.0
x = f(x + x/(1<<52))
w = f(w / (1 << 27))
y = f(y + y/(1<<52))
w0 := f(2 * w * (1 - w))
w1 := f(w * (1 + w))
x = x + w0*w1
x = inlineFma(x, w0, w1)
y = y + f(w0*w1)
y = y + f(w0*w1)
fmt.Println(x, y, x-y)
if x != y {
os.Exit(1)
}
}
|
