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
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
|
// Copyright 2016 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 gc
import "testing"
// For GO386=387, make sure fucomi* opcodes are not used
// for comparison operations.
// Note that this test will fail only on a Pentium MMX
// processor (with GOARCH=386 GO386=387), as it just runs
// some code and looks for an unimplemented instruction fault.
//go:noinline
func compare1(a, b float64) bool {
return a < b
}
//go:noinline
func compare2(a, b float32) bool {
return a < b
}
func TestFloatCompare(t *testing.T) {
if !compare1(3, 5) {
t.Errorf("compare1 returned false")
}
if !compare2(3, 5) {
t.Errorf("compare2 returned false")
}
}
// For GO386=387, make sure fucomi* opcodes are not used
// for float->int conversions.
//go:noinline
func cvt1(a float64) uint64 {
return uint64(a)
}
//go:noinline
func cvt2(a float64) uint32 {
return uint32(a)
}
//go:noinline
func cvt3(a float32) uint64 {
return uint64(a)
}
//go:noinline
func cvt4(a float32) uint32 {
return uint32(a)
}
//go:noinline
func cvt5(a float64) int64 {
return int64(a)
}
//go:noinline
func cvt6(a float64) int32 {
return int32(a)
}
//go:noinline
func cvt7(a float32) int64 {
return int64(a)
}
//go:noinline
func cvt8(a float32) int32 {
return int32(a)
}
func TestFloatConvert(t *testing.T) {
if got := cvt1(3.5); got != 3 {
t.Errorf("cvt1 got %d, wanted 3", got)
}
if got := cvt2(3.5); got != 3 {
t.Errorf("cvt2 got %d, wanted 3", got)
}
if got := cvt3(3.5); got != 3 {
t.Errorf("cvt3 got %d, wanted 3", got)
}
if got := cvt4(3.5); got != 3 {
t.Errorf("cvt4 got %d, wanted 3", got)
}
if got := cvt5(3.5); got != 3 {
t.Errorf("cvt5 got %d, wanted 3", got)
}
if got := cvt6(3.5); got != 3 {
t.Errorf("cvt6 got %d, wanted 3", got)
}
if got := cvt7(3.5); got != 3 {
t.Errorf("cvt7 got %d, wanted 3", got)
}
if got := cvt8(3.5); got != 3 {
t.Errorf("cvt8 got %d, wanted 3", got)
}
}
|
