compiler-rt/test/builtins/Unit/floattisf_test.c

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 // REQUIRES: librt_has_floattisf
   3 // REQUIRES: int128
   4
   5 #include "int_lib.h"
   6 #include <float.h>
   7 #include <stdio.h>
   8
   9 #ifdef CRT_HAS_128BIT
  10
  11 // Returns: convert a to a float, rounding toward even.
  12
  13 // Assumption: float is a IEEE 32 bit floating point type
  14 //             ti_int is a 64 bit integral type
  15
  16 // seee eeee emmm mmmm mmmm mmmm mmmm mmmm
  17
  18 COMPILER_RT_ABI float __floattisf(ti_int a);
  19
  20 int test__floattisf(ti_int a, float expected)
  21 {
  22     float x = __floattisf(a);
  23     if (x != expected)
  24     {
  25         twords at;
  26         at.all = a;
  27         printf("error in __floattisf(0x%.16llX%.16llX) = %a, expected %a\n",
  28                at.s.high, at.s.low, x, expected);
  29     }
  30     return x != expected;
  31 }
  32
  33 char assumption_1[sizeof(ti_int) == 2*sizeof(di_int)] = {0};
  34 char assumption_2[sizeof(ti_int)*CHAR_BIT == 128] = {0};
  35 char assumption_3[sizeof(float)*CHAR_BIT == 32] = {0};
  36
  37 #endif
  38
  39 int main()
  40 {
  41 #ifdef CRT_HAS_128BIT
  42     if (test__floattisf(0, 0.0F))
  43         return 1;
  44
  45     if (test__floattisf(1, 1.0F))
  46         return 1;
  47     if (test__floattisf(2, 2.0F))
  48         return 1;
  49     if (test__floattisf(-1, -1.0F))
  50         return 1;
  51     if (test__floattisf(-2, -2.0F))
  52         return 1;
  53
  54     if (test__floattisf(0x7FFFFF8000000000LL, 0x1.FFFFFEp+62F))
  55         return 1;
  56     if (test__floattisf(0x7FFFFF0000000000LL, 0x1.FFFFFCp+62F))
  57         return 1;
  58
  59     if (test__floattisf(make_ti(0xFFFFFFFFFFFFFFFFLL, 0x8000008000000000LL),
  60                         -0x1.FFFFFEp+62F))
  61         return 1;
  62     if (test__floattisf(make_ti(0xFFFFFFFFFFFFFFFFLL, 0x8000010000000000LL),
  63                         -0x1.FFFFFCp+62F))
  64         return 1;
  65
  66     if (test__floattisf(make_ti(0xFFFFFFFFFFFFFFFFLL, 0x8000000000000000LL),
  67                         -0x1.000000p+63F))
  68         return 1;
  69     if (test__floattisf(make_ti(0xFFFFFFFFFFFFFFFFLL, 0x8000000000000001LL),
  70                         -0x1.000000p+63F))
  71         return 1;
  72
  73     if (test__floattisf(0x0007FB72E8000000LL, 0x1.FEDCBAp+50F))
  74         return 1;
  75
  76     if (test__floattisf(0x0007FB72EA000000LL, 0x1.FEDCBAp+50F))
  77         return 1;
  78     if (test__floattisf(0x0007FB72EB000000LL, 0x1.FEDCBAp+50F))
  79         return 1;
  80     if (test__floattisf(0x0007FB72EBFFFFFFLL, 0x1.FEDCBAp+50F))
  81         return 1;
  82     if (test__floattisf(0x0007FB72EC000000LL, 0x1.FEDCBCp+50F))
  83         return 1;
  84     if (test__floattisf(0x0007FB72E8000001LL, 0x1.FEDCBAp+50F))
  85         return 1;
  86
  87     if (test__floattisf(0x0007FB72E6000000LL, 0x1.FEDCBAp+50F))
  88         return 1;
  89     if (test__floattisf(0x0007FB72E7000000LL, 0x1.FEDCBAp+50F))
  90         return 1;
  91     if (test__floattisf(0x0007FB72E7FFFFFFLL, 0x1.FEDCBAp+50F))
  92         return 1;
  93     if (test__floattisf(0x0007FB72E4000001LL, 0x1.FEDCBAp+50F))
  94         return 1;
  95     if (test__floattisf(0x0007FB72E4000000LL, 0x1.FEDCB8p+50F))
  96         return 1;
  97
  98     if (test__floattisf(make_ti(0x0007FB72E8000000LL, 0), 0x1.FEDCBAp+114F))
  99         return 1;
 100
 101     if (test__floattisf(make_ti(0x0007FB72EA000000LL, 0), 0x1.FEDCBAp+114F))
 102         return 1;
 103     if (test__floattisf(make_ti(0x0007FB72EB000000LL, 0), 0x1.FEDCBAp+114F))
 104         return 1;
 105     if (test__floattisf(make_ti(0x0007FB72EBFFFFFFLL, 0), 0x1.FEDCBAp+114F))
 106         return 1;
 107     if (test__floattisf(make_ti(0x0007FB72EC000000LL, 0), 0x1.FEDCBCp+114F))
 108         return 1;
 109     if (test__floattisf(make_ti(0x0007FB72E8000001LL, 0), 0x1.FEDCBAp+114F))
 110         return 1;
 111
 112     if (test__floattisf(make_ti(0x0007FB72E6000000LL, 0), 0x1.FEDCBAp+114F))
 113         return 1;
 114     if (test__floattisf(make_ti(0x0007FB72E7000000LL, 0), 0x1.FEDCBAp+114F))
 115         return 1;
 116     if (test__floattisf(make_ti(0x0007FB72E7FFFFFFLL, 0), 0x1.FEDCBAp+114F))
 117         return 1;
 118     if (test__floattisf(make_ti(0x0007FB72E4000001LL, 0), 0x1.FEDCBAp+114F))
 119         return 1;
 120     if (test__floattisf(make_ti(0x0007FB72E4000000LL, 0), 0x1.FEDCB8p+114F))
 121         return 1;
 122
 123 #else
 124     printf("skipped\n");
 125 #endif
 126    return 0;
 127 }