memcheck/tests/s390x/ltgjhe.c

   1 #include <stdio.h>
   2 #include "../../../none/tests/s390x/opcodes.h"
   3 int main()
   4 {
   5         int field1, field2;
   6         int result;
   7
   8         /*
   9          * gcc does some tricks for checking the highest bit. It seems
  10          * to load a full word/double word.
  11          * By using mask=10 for brc (jhe) only the msb is influencing
  12          * the code flow. This test was inspired by 308427
  13          */
  14         asm volatile(   "oi %1,128\n\t"
  15                         "la 1,%1\n\t"
  16                         LTG(0,0,1,000,00)
  17                         "jhe 1f\n\t"
  18                         "lghi %0,0\n\t"
  19                         "j 2f\n\t"
  20                         "1:lghi %0,1\n\t"
  21                         "2:\n\t"
  22                         :"=d" (result)
  23                         :"Q" (field1)
  24                         :"0","cc");
  25
  26         if (result)
  27                 printf("Error\n");
  28
  29         asm volatile(   "oi %1,128\n\t"
  30                         "la 1,%1\n\t"
  31                         LT(0,0,1,000,00)
  32                         "jhe 1f\n\t"
  33                         "lghi %0,0\n\t"
  34                         "j 2f\n\t"
  35                         "1:lghi %0,1\n\t"
  36                         "2:\n\t"
  37                         :"=d" (result)
  38                         :"Q" (field2)
  39                         :"0","cc");
  40
  41         if (result)
  42                 printf("Error\n");
  43
  44         asm volatile(   "oi %1,128\n\t"
  45                         "la 1,%1\n\t"
  46                         LTG(0,0,1,000,00)
  47                         "jl 1f\n\t"
  48                         "lghi %0,1\n\t"
  49                         "j 2f\n\t"
  50                         "1:lghi %0,0\n\t"
  51                         "2:\n\t"
  52                         :"=d" (result)
  53                         :"Q" (field1)
  54                         :"0","cc");
  55
  56         if (result)
  57                 printf("Error\n");
  58
  59         asm volatile(   "oi %1,128\n\t"
  60                         "la 1,%1\n\t"
  61                         LT(0,0,1,000,00)
  62                         "jl 1f\n\t"
  63                         "lghi %0,1\n\t"
  64                         "j 2f\n\t"
  65                         "1:lghi %0,0\n\t"
  66                         "2:\n\t"
  67                         :"=d" (result)
  68                         :"Q" (field2)
  69                         :"0","cc");
  70
  71         if (result)
  72                 printf("Error\n");
  73
  74         return 0;
  75 }