1 #include <stdio.h> 2 #include <config.h> 3 4 double foo = -1.0; 5 double FRT1; 6 double FRT2; 7 8 #ifdef HAS_ISA_2_07 9 10 /* b0 may be non-zero in lwarx/ldarx Power6 instrs */ 11 void test_reservation() 12 { 13 14 unsigned RT; 15 unsigned base; 16 unsigned offset; 17 unsigned arrB[] = { 0x00112233U, 0x44556677U, 0x8899aabbU, 0xccddeeffU }; 18 int arrH[] __attribute__ ((aligned (2))) = { 0xdeadbeef, 0xbad0beef, 0xbeefdead, 0xbeef0bad }; 19 20 /* The lbarx and lharx instructions were "phased in" in ISA 2.06. That 21 * means it they may show up in some implementations but not others. They 22 * are in all ISA 2.08 implementations. 23 */ 24 base = (unsigned) &arrB; 25 offset = ((unsigned ) &arrB[1]) - base; 26 __asm__ volatile ("ori 20, %0, 0"::"r" (base)); 27 __asm__ volatile ("ori 21, %0, 0"::"r" (offset)); 28 __asm__ volatile ("lbarx %0, 20, 21, 1":"=r" (RT)); 29 printf("lbarx => 0x%x\n", RT); 30 31 base = (unsigned) &arrH; 32 offset = ((unsigned) &arrH[1]) - base; 33 __asm__ volatile ("ori 20, %0, 0"::"r" (base)); 34 __asm__ volatile ("ori 21, %0, 0"::"r" (offset)); 35 __asm__ volatile ("lharx %0, 20, 21, 1":"=r" (RT)); 36 printf("lharx => 0x%x\n", RT); 37 38 } 39 #endif 40 41 int main(void) 42 { 43 #ifdef HAS_ISA_2_07 44 (void) test_reservation(); 45 #endif 46 47 return 0; 48 } 49
