src/c/arch.c

   1 /* support for the simulated micro-architecture */
   2
   3 #include "arch.h"
   4 #include "assertions.h"
   5 #include <stdlib.h>
   6
   7 int MAX_STACK_SIZE;
   8
   9 void initArchitecture(int stackSize, int regsCount)
  10 {
  11   MAX_STACK_SIZE = stackSize;
  12   stack = (int*)malloc( stackSize * sizeof(int) );
  13   sp = 0;
  14   fp = 0;
  15
  16   r = (int*)malloc( regsCount * sizeof(int) );
  17 }
  18
  19 void push(int x)
  20 {
  21   ASSERT_ALWAYS(sp < MAX_STACK_SIZE,"");
  22
  23   stack[sp++] = x;
  24 }
  25
  26 int pop()
  27 {
  28   ASSERT_ALWAYS(sp > 0,"");
  29
  30   return stack[--sp];
  31 }