?? mactest2.c
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/* mactest2.c - An example of using inline assembly macros in a program */#include <stdio.h>#define GREATER(a, b, result) ({ \ asm("cmp %1, %2\n\t" \ "jge 0f\n\t" \ "movl %1, %0\n\t" \ "jmp 1f\n\t" \ "0:\n\t" \ "movl %2, %0\n\t" \ "1:" \ :"=r"(result) \ :"r"(a), "r"(b)); })int main(){ int data1 = 10; int data2 = 20; int result; GREATER(data1, data2, result); printf("a = %d, b = %d result: %d\n", data1, data2, result); data1 = 30; GREATER(data1, data2, result); printf("a = %d, b = %d result: %d\n", data1, data2, result); return 0;}
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