areatest.c

来自「汇编经典教程profession_assembly_language（Richa」· C语言 代码 · 共 20 行

/* areatest.c - An example of using floating point regs */
#include <stdio.h>

int main()
{
   int radius = 10;
   float area;

   asm("fild %1\n\t"
       "fimul %1\n\t"
       "fldpi\n\t"
       "fmul %%st(1), %%st(0)"
       : "=t"(area)
       :"m"(radius)
       : "%st(1)");

   printf("The result is %f\n", area);
   return 0;
}