compiler-rt/test/builtins/Unit/ppc/fixunstfti_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 "fixunstfti_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 __uint128_t __fixunstfti(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->
  34      * uint128 conversion, and check for errors between results. */
  35     computedResult = __fixunstfti(ldInput.ld);
  36
  37     if (computedResult != expectedResult) {
  38       printf("Error for __fixunstfti at input %La = ( %a , %a ):\n", ldInput.ld,
  39              ldInput.d[0], ldInput.d[1]);
  40       printf("\tExpected __uint128_t: 0x%016llx 0x%016llx\n",
  41              (unsigned long long)(expectedResult >> 64),
  42              (unsigned long long)expectedResult);
  43       printf("\tComputed __uint128_t: 0x%016llx 0x%016llx\n\n",
  44              (unsigned long long)(computedResult >> 64),
  45              (unsigned long long)computedResult);
  46
  47       return 1;
  48     }
  49   }
  50
  51   return 0;
  52 }