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Source file src/cmd/compile/internal/test/math_test.go

Documentation: cmd/compile/internal/test

     1  // Copyright 2023 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package test
     6  
     7  import (
     8  	"testing"
     9  )
    10  
    11  var Output int
    12  
    13  func BenchmarkDiv64UnsignedSmall(b *testing.B) {
    14  	q := uint64(1)
    15  	for i := 1; i <= b.N; i++ {
    16  		q = (q + uint64(i)) / uint64(i)
    17  	}
    18  	Output = int(q)
    19  }
    20  
    21  func BenchmarkDiv64Small(b *testing.B) {
    22  	q := int64(1)
    23  	for i := 1; i <= b.N; i++ {
    24  		q = (q + int64(i)) / int64(i)
    25  	}
    26  	Output = int(q)
    27  }
    28  
    29  func BenchmarkDiv64SmallNegDivisor(b *testing.B) {
    30  	q := int64(-1)
    31  	for i := 1; i <= b.N; i++ {
    32  		q = (int64(i) - q) / -int64(i)
    33  	}
    34  	Output = int(q)
    35  }
    36  
    37  func BenchmarkDiv64SmallNegDividend(b *testing.B) {
    38  	q := int64(-1)
    39  	for i := 1; i <= b.N; i++ {
    40  		q = -(int64(i) - q) / int64(i)
    41  	}
    42  	Output = int(q)
    43  }
    44  
    45  func BenchmarkDiv64SmallNegBoth(b *testing.B) {
    46  	q := int64(1)
    47  	for i := 1; i <= b.N; i++ {
    48  		q = -(int64(i) + q) / -int64(i)
    49  	}
    50  	Output = int(q)
    51  }
    52  
    53  func BenchmarkDiv64Unsigned(b *testing.B) {
    54  	q := uint64(1)
    55  	for i := 1; i <= b.N; i++ {
    56  		q = (uint64(0x7fffffffffffffff) - uint64(i) - (q & 1)) / uint64(i)
    57  	}
    58  	Output = int(q)
    59  }
    60  
    61  func BenchmarkDiv64(b *testing.B) {
    62  	q := int64(1)
    63  	for i := 1; i <= b.N; i++ {
    64  		q = (int64(0x7fffffffffffffff) - int64(i) - (q & 1)) / int64(i)
    65  	}
    66  	Output = int(q)
    67  }
    68  
    69  func BenchmarkDiv64NegDivisor(b *testing.B) {
    70  	q := int64(-1)
    71  	for i := 1; i <= b.N; i++ {
    72  		q = (int64(0x7fffffffffffffff) - int64(i) - (q & 1)) / -int64(i)
    73  	}
    74  	Output = int(q)
    75  }
    76  
    77  func BenchmarkDiv64NegDividend(b *testing.B) {
    78  	q := int64(-1)
    79  	for i := 1; i <= b.N; i++ {
    80  		q = -(int64(0x7fffffffffffffff) - int64(i) - (q & 1)) / int64(i)
    81  	}
    82  	Output = int(q)
    83  }
    84  
    85  func BenchmarkDiv64NegBoth(b *testing.B) {
    86  	q := int64(-1)
    87  	for i := 1; i <= b.N; i++ {
    88  		q = -(int64(0x7fffffffffffffff) - int64(i) - (q & 1)) / -int64(i)
    89  	}
    90  	Output = int(q)
    91  }
    92  
    93  func BenchmarkMod64UnsignedSmall(b *testing.B) {
    94  	r := uint64(1)
    95  	for i := 1; i <= b.N; i++ {
    96  		r = (uint64(i) + r) % uint64(i)
    97  	}
    98  	Output = int(r)
    99  }
   100  
   101  func BenchmarkMod64Small(b *testing.B) {
   102  	r := int64(1)
   103  	for i := 1; i <= b.N; i++ {
   104  		r = (int64(i) + r) % int64(i)
   105  	}
   106  	Output = int(r)
   107  }
   108  
   109  func BenchmarkMod64SmallNegDivisor(b *testing.B) {
   110  	r := int64(-1)
   111  	for i := 1; i <= b.N; i++ {
   112  		r = (int64(i) - r) % -int64(i)
   113  	}
   114  	Output = int(r)
   115  }
   116  
   117  func BenchmarkMod64SmallNegDividend(b *testing.B) {
   118  	r := int64(-1)
   119  	for i := 1; i <= b.N; i++ {
   120  		r = -(int64(i) - r) % int64(i)
   121  	}
   122  	Output = int(r)
   123  }
   124  
   125  func BenchmarkMod64SmallNegBoth(b *testing.B) {
   126  	r := int64(1)
   127  	for i := 1; i <= b.N; i++ {
   128  		r = -(int64(i) + r) % -int64(i)
   129  	}
   130  	Output = int(r)
   131  }
   132  
   133  func BenchmarkMod64Unsigned(b *testing.B) {
   134  	r := uint64(1)
   135  	for i := 1; i <= b.N; i++ {
   136  		r = (uint64(0x7fffffffffffffff) - uint64(i) - (r & 1)) % uint64(i)
   137  	}
   138  	Output = int(r)
   139  }
   140  
   141  func BenchmarkMod64(b *testing.B) {
   142  	r := int64(1)
   143  	for i := 1; i <= b.N; i++ {
   144  		r = (int64(0x7fffffffffffffff) - int64(i) - (r & 1)) % int64(i)
   145  	}
   146  	Output = int(r)
   147  }
   148  
   149  func BenchmarkMod64NegDivisor(b *testing.B) {
   150  	r := int64(-1)
   151  	for i := 1; i <= b.N; i++ {
   152  		r = (int64(0x7fffffffffffffff) - int64(i) - (r & 1)) % -int64(i)
   153  	}
   154  	Output = int(r)
   155  }
   156  
   157  func BenchmarkMod64NegDividend(b *testing.B) {
   158  	r := int64(-1)
   159  	for i := 1; i <= b.N; i++ {
   160  		r = -(int64(0x7fffffffffffffff) - int64(i) - (r & 1)) % int64(i)
   161  	}
   162  	Output = int(r)
   163  }
   164  
   165  func BenchmarkMod64NegBoth(b *testing.B) {
   166  	r := int64(1)
   167  	for i := 1; i <= b.N; i++ {
   168  		r = -(int64(0x7fffffffffffffff) - int64(i) - (r & 1)) % -int64(i)
   169  	}
   170  	Output = int(r)
   171  }
   172  

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