github.com/brownsys/tracing-framework-go@v0.0.0-20161210174012-0542a62412fe/go/darwin_amd64/test/intrinsic.dir/main.go (about)

     1  // Copyright 2016 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 main
     6  
     7  import (
     8  	"fmt"
     9  	T "runtime/internal/sys"
    10  )
    11  
    12  var A = []uint64{0x0102030405060708, 0x1122334455667788}
    13  var B = []uint64{0x0807060504030201, 0x8877665544332211}
    14  
    15  var errors int
    16  
    17  func logf(f string, args ...interface{}) {
    18  	errors++
    19  	fmt.Printf(f, args...)
    20  	if errors > 100 { // 100 is enough spewage
    21  		panic("100 errors is plenty is enough")
    22  	}
    23  }
    24  
    25  func test(i, x uint64) {
    26  	t := T.Ctz64(x) // ERROR "intrinsic substitution for Ctz64"
    27  	if i != t {
    28  		logf("Ctz64(0x%x) expected %d but got %d\n", x, i, t)
    29  	}
    30  	x = -x
    31  	t = T.Ctz64(x) // ERROR "intrinsic substitution for Ctz64"
    32  	if i != t {
    33  		logf("Ctz64(0x%x) expected %d but got %d\n", x, i, t)
    34  	}
    35  
    36  	if i <= 32 {
    37  		x32 := uint32(x)
    38  		t32 := T.Ctz32(x32) // ERROR "intrinsic substitution for Ctz32"
    39  		if uint32(i) != t32 {
    40  			logf("Ctz32(0x%x) expected %d but got %d\n", x32, i, t32)
    41  		}
    42  		x32 = -x32
    43  		t32 = T.Ctz32(x32) // ERROR "intrinsic substitution for Ctz32"
    44  		if uint32(i) != t32 {
    45  			logf("Ctz32(0x%x) expected %d but got %d\n", x32, i, t32)
    46  		}
    47  	}
    48  	if i <= 16 {
    49  		x16 := uint16(x)
    50  		t16 := T.Ctz16(x16) // ERROR "intrinsic substitution for Ctz16"
    51  		if uint16(i) != t16 {
    52  			logf("Ctz16(0x%x) expected %d but got %d\n", x16, i, t16)
    53  		}
    54  		x16 = -x16
    55  		t16 = T.Ctz16(x16) // ERROR "intrinsic substitution for Ctz16"
    56  		if uint16(i) != t16 {
    57  			logf("Ctz16(0x%x) expected %d but got %d\n", x16, i, t16)
    58  		}
    59  	}
    60  }
    61  
    62  func main() {
    63  	// Test Bswap first because the other test relies on it
    64  	// working correctly (to implement bit reversal).
    65  	for i := range A {
    66  		x := A[i]
    67  		y := B[i]
    68  		X := T.Bswap64(x) // ERROR "intrinsic substitution for Bswap64"
    69  		Y := T.Bswap64(y) // ERROR "intrinsic substitution for Bswap64"
    70  		if y != X {
    71  			logf("Bswap64(0x%08x) expected 0x%08x but got 0x%08x\n", x, y, X)
    72  		}
    73  		if x != Y {
    74  			logf("Bswap64(0x%08x) expected 0x%08x but got 0x%08x\n", y, x, Y)
    75  		}
    76  
    77  		x32 := uint32(X)
    78  		y32 := uint32(Y >> 32)
    79  
    80  		X32 := T.Bswap32(x32) // ERROR "intrinsic substitution for Bswap32"
    81  		Y32 := T.Bswap32(y32) // ERROR "intrinsic substitution for Bswap32"
    82  		if y32 != X32 {
    83  			logf("Bswap32(0x%08x) expected 0x%08x but got 0x%08x\n", x32, y32, X32)
    84  		}
    85  		if x32 != Y32 {
    86  			logf("Bswap32(0x%08x) expected 0x%08x but got 0x%08x\n", y32, x32, Y32)
    87  		}
    88  	}
    89  
    90  	// Zero is a special case, be sure it is done right.
    91  	if T.Ctz16(0) != 16 { // ERROR "intrinsic substitution for Ctz16"
    92  		logf("ctz16(0) != 16")
    93  	}
    94  	if T.Ctz32(0) != 32 { // ERROR "intrinsic substitution for Ctz32"
    95  		logf("ctz32(0) != 32")
    96  	}
    97  	if T.Ctz64(0) != 64 { // ERROR "intrinsic substitution for Ctz64"
    98  		logf("ctz64(0) != 64")
    99  	}
   100  
   101  	for i := uint64(0); i <= 64; i++ {
   102  		for j := uint64(1); j <= 255; j += 2 {
   103  			for k := uint64(1); k <= 65537; k += 128 {
   104  				x := (j * k) << i
   105  				test(i, x)
   106  			}
   107  		}
   108  	}
   109  }