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e36aeda | 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 | // 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 test
import (
"testing"
)
var boolres bool
var i64res int64
func BenchmarkDivconstI64(b *testing.B) {
for i := 0; i < b.N; i++ {
i64res = int64(i) / 7
}
}
func BenchmarkModconstI64(b *testing.B) {
for i := 0; i < b.N; i++ {
i64res = int64(i) % 7
}
}
func BenchmarkDivisiblePow2constI64(b *testing.B) {
for i := 0; i < b.N; i++ {
boolres = int64(i)%16 == 0
}
}
func BenchmarkDivisibleconstI64(b *testing.B) {
for i := 0; i < b.N; i++ {
boolres = int64(i)%7 == 0
}
}
func BenchmarkDivisibleWDivconstI64(b *testing.B) {
for i := 0; i < b.N; i++ {
i64res = int64(i) / 7
boolres = int64(i)%7 == 0
}
}
var u64res uint64
func TestDivmodConstU64(t *testing.T) {
// Test division by c. Function f must be func(n) { return n/c, n%c }
testdiv := func(c uint64, f func(uint64) (uint64, uint64)) func(*testing.T) {
return func(t *testing.T) {
x := uint64(12345)
for i := 0; i < 10000; i++ {
x += x << 2
q, r := f(x)
if r < 0 || r >= c || q*c+r != x {
t.Errorf("divmod(%d, %d) returned incorrect (%d, %d)", x, c, q, r)
}
}
max := uint64(1<<64-1) / c * c
xs := []uint64{0, 1, c - 1, c, c + 1, 2*c - 1, 2 * c, 2*c + 1,
c*c - 1, c * c, c*c + 1, max - 1, max, max + 1, 1<<64 - 1}
for _, x := range xs {
q, r := f(x)
if r < 0 || r >= c || q*c+r != x {
t.Errorf("divmod(%d, %d) returned incorrect (%d, %d)", x, c, q, r)
}
}
}
}
t.Run("2", testdiv(2, func(n uint64) (uint64, uint64) { return n / 2, n % 2 }))
t.Run("3", testdiv(3, func(n uint64) (uint64, uint64) { return n / 3, n % 3 }))
t.Run("4", testdiv(4, func(n uint64) (uint64, uint64) { return n / 4, n % 4 }))
t.Run("5", testdiv(5, func(n uint64) (uint64, uint64) { return n / 5, n % 5 }))
t.Run("6", testdiv(6, func(n uint64) (uint64, uint64) { return n / 6, n % 6 }))
t.Run("7", testdiv(7, func(n uint64) (uint64, uint64) { return n / 7, n % 7 }))
t.Run("8", testdiv(8, func(n uint64) (uint64, uint64) { return n / 8, n % 8 }))
t.Run("9", testdiv(9, func(n uint64) (uint64, uint64) { return n / 9, n % 9 }))
t.Run("10", testdiv(10, func(n uint64) (uint64, uint64) { return n / 10, n % 10 }))
t.Run("11", testdiv(11, func(n uint64) (uint64, uint64) { return n / 11, n % 11 }))
t.Run("12", testdiv(12, func(n uint64) (uint64, uint64) { return n / 12, n % 12 }))
t.Run("13", testdiv(13, func(n uint64) (uint64, uint64) { return n / 13, n % 13 }))
t.Run("14", testdiv(14, func(n uint64) (uint64, uint64) { return n / 14, n % 14 }))
t.Run("15", testdiv(15, func(n uint64) (uint64, uint64) { return n / 15, n % 15 }))
t.Run("16", testdiv(16, func(n uint64) (uint64, uint64) { return n / 16, n % 16 }))
t.Run("17", testdiv(17, func(n uint64) (uint64, uint64) { return n / 17, n % 17 }))
t.Run("255", testdiv(255, func(n uint64) (uint64, uint64) { return n / 255, n % 255 }))
t.Run("256", testdiv(256, func(n uint64) (uint64, uint64) { return n / 256, n % 256 }))
t.Run("257", testdiv(257, func(n uint64) (uint64, uint64) { return n / 257, n % 257 }))
t.Run("65535", testdiv(65535, func(n uint64) (uint64, uint64) { return n / 65535, n % 65535 }))
t.Run("65536", testdiv(65536, func(n uint64) (uint64, uint64) { return n / 65536, n % 65536 }))
t.Run("65537", testdiv(65537, func(n uint64) (uint64, uint64) { return n / 65537, n % 65537 }))
t.Run("1<<32-1", testdiv(1<<32-1, func(n uint64) (uint64, uint64) { return n / (1<<32 - 1), n % (1<<32 - 1) }))
t.Run("1<<32+1", testdiv(1<<32+1, func(n uint64) (uint64, uint64) { return n / (1<<32 + 1), n % (1<<32 + 1) }))
t.Run("1<<64-1", testdiv(1<<64-1, func(n uint64) (uint64, uint64) { return n / (1<<64 - 1), n % (1<<64 - 1) }))
}
func BenchmarkDivconstU64(b *testing.B) {
b.Run("3", func(b *testing.B) {
x := uint64(123456789123456789)
for i := 0; i < b.N; i++ {
x += x << 4
u64res = x / 3
}
})
b.Run("5", func(b *testing.B) {
x := uint64(123456789123456789)
for i := 0; i < b.N; i++ {
x += x << 4
u64res = x / 5
}
})
b.Run("37", func(b *testing.B) {
x := uint64(123456789123456789)
for i := 0; i < b.N; i++ {
x += x << 4
u64res = x / 37
}
})
b.Run("1234567", func(b *testing.B) {
x := uint64(123456789123456789)
for i := 0; i < b.N; i++ {
x += x << 4
u64res = x / 1234567
}
})
}
func BenchmarkModconstU64(b *testing.B) {
for i := 0; i < b.N; i++ {
u64res = uint64(i) % 7
}
}
func BenchmarkDivisibleconstU64(b *testing.B) {
for i := 0; i < b.N; i++ {
boolres = uint64(i)%7 == 0
}
}
func BenchmarkDivisibleWDivconstU64(b *testing.B) {
for i := 0; i < b.N; i++ {
u64res = uint64(i) / 7
boolres = uint64(i)%7 == 0
}
}
var i32res int32
func BenchmarkDivconstI32(b *testing.B) {
for i := 0; i < b.N; i++ {
i32res = int32(i) / 7
}
}
func BenchmarkModconstI32(b *testing.B) {
for i := 0; i < b.N; i++ {
i32res = int32(i) % 7
}
}
func BenchmarkDivisiblePow2constI32(b *testing.B) {
for i := 0; i < b.N; i++ {
boolres = int32(i)%16 == 0
}
}
func BenchmarkDivisibleconstI32(b *testing.B) {
for i := 0; i < b.N; i++ {
boolres = int32(i)%7 == 0
}
}
func BenchmarkDivisibleWDivconstI32(b *testing.B) {
for i := 0; i < b.N; i++ {
i32res = int32(i) / 7
boolres = int32(i)%7 == 0
}
}
var u32res uint32
func BenchmarkDivconstU32(b *testing.B) {
for i := 0; i < b.N; i++ {
u32res = uint32(i) / 7
}
}
func BenchmarkModconstU32(b *testing.B) {
for i := 0; i < b.N; i++ {
u32res = uint32(i) % 7
}
}
func BenchmarkDivisibleconstU32(b *testing.B) {
for i := 0; i < b.N; i++ {
boolres = uint32(i)%7 == 0
}
}
func BenchmarkDivisibleWDivconstU32(b *testing.B) {
for i := 0; i < b.N; i++ {
u32res = uint32(i) / 7
boolres = uint32(i)%7 == 0
}
}
var i16res int16
func BenchmarkDivconstI16(b *testing.B) {
for i := 0; i < b.N; i++ {
i16res = int16(i) / 7
}
}
func BenchmarkModconstI16(b *testing.B) {
for i := 0; i < b.N; i++ {
i16res = int16(i) % 7
}
}
func BenchmarkDivisiblePow2constI16(b *testing.B) {
for i := 0; i < b.N; i++ {
boolres = int16(i)%16 == 0
}
}
func BenchmarkDivisibleconstI16(b *testing.B) {
for i := 0; i < b.N; i++ {
boolres = int16(i)%7 == 0
}
}
func BenchmarkDivisibleWDivconstI16(b *testing.B) {
for i := 0; i < b.N; i++ {
i16res = int16(i) / 7
boolres = int16(i)%7 == 0
}
}
var u16res uint16
func BenchmarkDivconstU16(b *testing.B) {
for i := 0; i < b.N; i++ {
u16res = uint16(i) / 7
}
}
func BenchmarkModconstU16(b *testing.B) {
for i := 0; i < b.N; i++ {
u16res = uint16(i) % 7
}
}
func BenchmarkDivisibleconstU16(b *testing.B) {
for i := 0; i < b.N; i++ {
boolres = uint16(i)%7 == 0
}
}
func BenchmarkDivisibleWDivconstU16(b *testing.B) {
for i := 0; i < b.N; i++ {
u16res = uint16(i) / 7
boolres = uint16(i)%7 == 0
}
}
var i8res int8
func BenchmarkDivconstI8(b *testing.B) {
for i := 0; i < b.N; i++ {
i8res = int8(i) / 7
}
}
func BenchmarkModconstI8(b *testing.B) {
for i := 0; i < b.N; i++ {
i8res = int8(i) % 7
}
}
func BenchmarkDivisiblePow2constI8(b *testing.B) {
for i := 0; i < b.N; i++ {
boolres = int8(i)%16 == 0
}
}
func BenchmarkDivisibleconstI8(b *testing.B) {
for i := 0; i < b.N; i++ {
boolres = int8(i)%7 == 0
}
}
func BenchmarkDivisibleWDivconstI8(b *testing.B) {
for i := 0; i < b.N; i++ {
i8res = int8(i) / 7
boolres = int8(i)%7 == 0
}
}
var u8res uint8
func BenchmarkDivconstU8(b *testing.B) {
for i := 0; i < b.N; i++ {
u8res = uint8(i) / 7
}
}
func BenchmarkModconstU8(b *testing.B) {
for i := 0; i < b.N; i++ {
u8res = uint8(i) % 7
}
}
func BenchmarkDivisibleconstU8(b *testing.B) {
for i := 0; i < b.N; i++ {
boolres = uint8(i)%7 == 0
}
}
func BenchmarkDivisibleWDivconstU8(b *testing.B) {
for i := 0; i < b.N; i++ {
u8res = uint8(i) / 7
boolres = uint8(i)%7 == 0
}
}
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