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go/test/fixedbugs/issue6889.go
Robert Griesemer a51d5f27e8 cmd/internal/gc: use 512 bits (rather than 464) for multi-precision arithmetic
The original implementation used 16 int "words" but only 29 bits per word
for a total of 16*29 = 464 bits, with a space consumption of 16*64 = 1024
bits on a 64 bit machine. Switching to 512 bits increases precision while
still using (in the worst case) half the amount of memory per mp value on
a 64 bit machine.

Also: Decreased permitted number of least-significant mantissa bits which
may be incorrect when considering if a precise floating-point constant is
an integer from 29 to 16 bits.

Change-Id: Iee9287056f0e9aa4f06ceac0724ff4674f710c53
Reviewed-on: https://go-review.googlesource.com/8429
Reviewed-by: Russ Cox <rsc@golang.org>
2015-04-03 17:13:07 +00:00

112 lines
1.8 KiB
Go

// errorcheck
// Copyright 2014 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.
// Issue 6889: confusing error message: ovf in mpaddxx
package main
const (
f1 = 1
f2 = f1 * 2
f3 = f2 * 3
f4 = f3 * 4
f5 = f4 * 5
f6 = f5 * 6
f7 = f6 * 7
f8 = f7 * 8
f9 = f8 * 9
f10 = f9 * 10
f11 = f10 * 11
f12 = f11 * 12
f13 = f12 * 13
f14 = f13 * 14
f15 = f14 * 15
f16 = f15 * 16
f17 = f16 * 17
f18 = f17 * 18
f19 = f18 * 19
f20 = f19 * 20
f21 = f20 * 21
f22 = f21 * 22
f23 = f22 * 23
f24 = f23 * 24
f25 = f24 * 25
f26 = f25 * 26
f27 = f26 * 27
f28 = f27 * 28
f29 = f28 * 29
f30 = f29 * 30
f31 = f30 * 31
f32 = f31 * 32
f33 = f32 * 33
f34 = f33 * 34
f35 = f34 * 35
f36 = f35 * 36
f37 = f36 * 37
f38 = f37 * 38
f39 = f38 * 39
f40 = f39 * 40
f41 = f40 * 41
f42 = f41 * 42
f43 = f42 * 43
f44 = f43 * 44
f45 = f44 * 45
f46 = f45 * 46
f47 = f46 * 47
f48 = f47 * 48
f49 = f48 * 49
f50 = f49 * 50
f51 = f50 * 51
f52 = f51 * 52
f53 = f52 * 53
f54 = f53 * 54
f55 = f54 * 55
f56 = f55 * 56
f57 = f56 * 57
f58 = f57 * 58
f59 = f58 * 59
f60 = f59 * 60
f61 = f60 * 61
f62 = f61 * 62
f63 = f62 * 63
f64 = f63 * 64
f65 = f64 * 65
f66 = f65 * 66
f67 = f66 * 67
f68 = f67 * 68
f69 = f68 * 69
f70 = f69 * 70
f71 = f70 * 71
f72 = f71 * 72
f73 = f72 * 73
f74 = f73 * 74
f75 = f74 * 75
f76 = f75 * 76
f77 = f76 * 77
f78 = f77 * 78
f79 = f78 * 79
f80 = f79 * 80
f81 = f80 * 81
f82 = f81 * 82
f83 = f82 * 83
f84 = f83 * 84
f85 = f84 * 85
f86 = f85 * 86
f87 = f86 * 87
f88 = f87 * 88
f89 = f88 * 89
f90 = f89 * 90
f91 = f90 * 91
f92 = f91 * 92
f93 = f92 * 93
f94 = f93 * 94
f95 = f94 * 95
f96 = f95 * 96
f97 = f96 * 97
f98 = f97 * 98
f99 = f98 * 99 // ERROR "overflow"
)