none/tests/mips64/cvm_bbit.c

   1 #include <stdio.h>
   2
   3 int main()
   4 {
   5 #if (_MIPS_ARCH_OCTEON)
   6    int t1 = 0;
   7    int t2 = 0;
   8    __asm__ volatile(
   9       ".set noreorder"          "\n\t"
  10       "move  $t0, $zero"        "\n\t"
  11       "label2:"                 "\n\t"
  12       "addiu $t0, $t0, 1"       "\n\t"
  13       "bbit0 $t0, 0x3, label2"  "\n\t"
  14       "nop"                     "\n\t"
  15       "move %0, $t0"            "\n\t"
  16       ".set reorder"            "\n\t"
  17       : "=r" (t1)
  18       :
  19       : "t0");
  20    __asm__ volatile(
  21       ".set noreorder"          "\n\t"
  22       "li    $t0, 0xff"         "\n\t"
  23       "label1:"                 "\n\t"
  24       "addiu $t0, $t0, -1"      "\n\t"
  25       "bbit1 $t0, 0x3, label1"  "\n\t"
  26       "nop"                     "\n\t"
  27       "move %0, $t0"            "\n\t"
  28       ".set reorder"            "\n\t"
  29       : "=r" (t2)
  30       :
  31       : "t0");
  32
  33    printf("TEST bbit0: %s\n", t1 == 0x08 ? "PASS" : "FAIL");
  34    printf("TEST bbit1: %s\n", t2 == 0xF7 ? "PASS" : "FAIL");
  35
  36    long long int lt1 = 0;
  37    long long int lt2 = 0;
  38    long long int lt3 = 0xff00000000;
  39    long long int lt4 = 0x100000000;
  40    /* Take 0x100000000 and loop until 35th bit is set
  41       by incrementing 0x100000000 at a time. */
  42    __asm__ volatile(
  43       ".set noreorder"           "\n\t"
  44       "move $t0, $zero"          "\n\t"
  45       "move $t1, %1"             "\n\t"
  46       "label4:"                  "\n\t"
  47       "dadd $t0, $t0, $t1"       "\n\t"
  48       "bbit032 $t0, 0x3, label4" "\n\t"
  49       "nop"                      "\n\t"
  50       "move %0, $t0"             "\n\t"
  51       ".set reorder"             "\n\t"
  52       : "=r" (lt1)
  53       : "r" (lt4)
  54       : "t0", "t1");
  55    /* Take 0xff00000000 and loop until 35th bit is cleared
  56       by decrementing 0x100000000 at a time. */
  57    __asm__ volatile(
  58       ".set noreorder"           "\n\t"
  59       "move $t0, %1"             "\n\t"
  60       "move $t1, %2"             "\n\t"
  61       "label3:"                  "\n\t"
  62       "dadd $t0, $t0, $t1"       "\n\t"
  63       "bbit132 $t0, 0x3, label3" "\n\t"
  64       "nop"                      "\n\t"
  65       "move %0, $t0"             "\n\t"
  66       ".set reorder"             "\n\t"
  67       : "=r" (lt2)
  68       : "r" (lt3), "r" (-lt4)
  69       : "t0", "t1");
  70
  71    printf("TEST bbit032: %s\n", lt1 == 0x0800000000 ? "PASS" : "FAIL");
  72    printf("TEST bbit132: %s\n", lt2 == 0xF700000000 ? "PASS" : "FAIL");
  73
  74 #endif
  75    return 0;
  76 }