_status8.c

来自「开放源码的编译器open watcom 1.6.0版的源代码」· C语言 代码 · 共 21 行

#include <stdio.h>
#include <float.h>

#define TEST_FPU(x,y) printf( "\t%s " y "\n", \
                ((fp_status & x) ? "  " : "No") )

void main()
  {
    unsigned int fp_status;

    fp_status = _status87();

    printf( "80x87 status\n" );
    TEST_FPU( SW_INVALID, "invalid operation" );
    TEST_FPU( SW_DENORMAL, "denormalized operand" );
    TEST_FPU( SW_ZERODIVIDE, "divide by zero" );
    TEST_FPU( SW_OVERFLOW, "overflow" );
    TEST_FPU( SW_UNDERFLOW, "underflow" );
    TEST_FPU( SW_INEXACT, "inexact result" );
  }