gdb/testsuite/gdb.reverse/i387-stack-reverse.c

   1 #include <stdio.h>
   2 #include <math.h>
   3 #include <stdlib.h>
   4
   5 /* marks FPU stack as empty */
   6 void empty_fpu_stack()
   7 {
   8   asm ("ffree %st(1) \n\t"
   9        "ffree %st(2) \n\t"
  10        "ffree %st(3) \n\t"
  11        "ffree %st(4) \n\t"
  12        "ffree %st(5) \n\t"
  13        "ffree %st(6) \n\t"
  14        "ffree %st(7)");
  15 }
  16
  17 /* tests floating point arithmatic */
  18 void test_arith_floats()
  19 {
  20
  21 }
  22
  23 int main()
  24 {
  25   empty_fpu_stack();    /* BEGIN I387-FLOAT-REVERSE */
  26
  27   asm ("fld1");   /* test st0 register */
  28   asm ("fldl2t"); /* test st0, st1 */
  29   asm ("fldl2e"); /* test st0, st1, st2 */
  30   asm ("fldpi");  /* test st0, st1, st2, st3 */
  31   asm ("fldlg2"); /* test st0, st1, st2, st3, st4 */
  32   asm ("fldln2"); /* test st0, st1, st2, st3, st4, st5 */
  33   asm ("fldz");   /* test st0, st1, st2, st3, st4, st5, st6 */
  34   asm ("fld1");   /* test st0, st1, st2, st3, st4, st5, st6, st7 */
  35   asm ("nop");
  36
  37   return 1;             /* END I387-FLOAT-REVERSE */
  38 }