Training courses

Kernel and Embedded Linux

Bootlin training courses

Embedded Linux, kernel,
Yocto Project, Buildroot, real-time,
graphics, boot time, debugging...

Bootlin logo

Elixir Cross Referencer

Open Menu /sys/external/bsd/compiler_rt/dist/test/builtins/Unit/fixunsdfsi_test.c 
  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
//===-- fixunsdfsi_test.c - Test __fixunsdfsi -----------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file tests __fixunsdfsi for the compiler_rt library.
//
//===----------------------------------------------------------------------===//

#include "int_lib.h"
#include <stdio.h>

// Returns: convert a to a unsigned int, rounding toward zero.
//          Negative values all become zero.

// Assumption: double is a IEEE 64 bit floating point type 
//             su_int is a 32 bit integral type
//             value in double is representable in su_int or is negative 
//                 (no range checking performed)

// seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm

COMPILER_RT_ABI su_int __fixunsdfsi(double a);

int test__fixunsdfsi(double a, su_int expected)
{
    su_int x = __fixunsdfsi(a);
    if (x != expected)
        printf("error in __fixunsdfsi(%A) = %X, expected %X\n", a, x, expected);
    return x != expected;
}

char assumption_2[sizeof(su_int)*CHAR_BIT == 32] = {0};
char assumption_3[sizeof(double)*CHAR_BIT == 64] = {0};

int main()
{
    if (test__fixunsdfsi(0.0, 0))
        return 1;

    if (test__fixunsdfsi(0.5, 0))
        return 1;
    if (test__fixunsdfsi(0.99, 0))
        return 1;
    if (test__fixunsdfsi(1.0, 1))
        return 1;
    if (test__fixunsdfsi(1.5, 1))
        return 1;
    if (test__fixunsdfsi(1.99, 1))
        return 1;
    if (test__fixunsdfsi(2.0, 2))
        return 1;
    if (test__fixunsdfsi(2.01, 2))
        return 1;
    if (test__fixunsdfsi(-0.5, 0))
        return 1;
    if (test__fixunsdfsi(-0.99, 0))
        return 1;
#if !TARGET_LIBGCC
    if (test__fixunsdfsi(-1.0, 0))  // libgcc ignores "returns 0 for negative input" spec
        return 1;
    if (test__fixunsdfsi(-1.5, 0))
        return 1;
    if (test__fixunsdfsi(-1.99, 0))
        return 1;
    if (test__fixunsdfsi(-2.0, 0))
        return 1;
    if (test__fixunsdfsi(-2.01, 0))
        return 1;
#endif

    if (test__fixunsdfsi(0x1.000000p+31, 0x80000000))
        return 1;
    if (test__fixunsdfsi(0x1.000000p+32, 0xFFFFFFFF))
        return 1;
    if (test__fixunsdfsi(0x1.FFFFFEp+31, 0xFFFFFF00))
        return 1;
    if (test__fixunsdfsi(0x1.FFFFFEp+30, 0x7FFFFF80))
        return 1;
    if (test__fixunsdfsi(0x1.FFFFFCp+30, 0x7FFFFF00))
        return 1;

#if !TARGET_LIBGCC
    if (test__fixunsdfsi(-0x1.FFFFFEp+30, 0))
        return 1;
    if (test__fixunsdfsi(-0x1.FFFFFCp+30, 0))
        return 1;
#endif

    if (test__fixunsdfsi(0x1.FFFFFFFEp+31, 0xFFFFFFFF))
        return 1;
    if (test__fixunsdfsi(0x1.FFFFFFFC00000p+30, 0x7FFFFFFF))
        return 1;
    if (test__fixunsdfsi(0x1.FFFFFFF800000p+30, 0x7FFFFFFE))
        return 1;

   return 0;
}