compiler-rt/test/builtins/Unit/ppc/fixtfti_test.c

   1 // REQUIRES: target-is-powerpc64le
   2 // RUN: %clang_builtins %s %librt -o %t && %run %t
   3
   4 #include <stdint.h>
   5 #include <stdio.h>
   6
   7 #include "fixtfti_test.h"
   8
   9 // The long double representation, with the high and low portions of
  10 // the long double, and the corresponding bit patterns of each double.
  11 typedef union {
  12   long double ld;
  13   double d[2]; // [0] is the high double, [1] is the low double.
  14   unsigned long long ull[2]; // High and low doubles as 64-bit integers.
  15 } ldUnion;
  16
  17 __int128_t __fixtfti(long double);
  18
  19 int main(int argc, char *argv[]) {
  20   // Necessary long double and (unsigned) 128 bit integer
  21   // declarations used to compare the computed and expected results
  22   // from converting the IBM double-double to int128.
  23   ldUnion ldInput;
  24   __uint128_t expectedResult, computedResult;
  25
  26   for (int i = 0; i < numTests; ++i) {
  27     // Set the expected 128 bit integer and the high and low
  28     // values of the long double input.
  29     ldInput.d[0] = testList[i].hiInput;
  30     ldInput.d[1] = testList[i].loInput;
  31     expectedResult = testList[i].result128;
  32
  33     // Get the computed 128 bit integer from the long double to
  34     // int128 conversion. Here we cast to unsigned int128 to
  35     // get the bit pattern of the result.
  36     computedResult = (__uint128_t) __fixtfti(ldInput.ld);
  37
  38     if (computedResult != expectedResult) {
  39       printf("Error for __fixtfti at input %La = ( %a , %a ):\n", ldInput.ld,
  40              ldInput.d[0], ldInput.d[1]);
  41       printf("\tExpected __int128_t: 0x%016llx 0x%016llx\n",
  42              (unsigned long long)(expectedResult >> 64),
  43              (unsigned long long)expectedResult);
  44       printf("\tComputed __int128_t: 0x%016llx 0x%016llx\n\n",
  45              (unsigned long long)(computedResult >> 64),
  46              (unsigned long long)computedResult);
  47
  48       return 1;
  49     }
  50   }
  51
  52   return 0;
  53 }