Appendix 2. Modula-2 Runtime Support Routines

Call runtime support routine r: CALL r (CALL = 70B)

r Name   Function      Stack Operands   Stack Result

0 Trap   System trap     trap number    -

1 Move   Move block     dest, source, length  -

2 IMul   Multiply integers   factor1, factor2   product

3 IDiv   Divide integers    dividend, divisor  quotient

4 IMod   Calculate congruence  number, modulus  congruence   

5 RAdd  Add reals     operand1, operand2 result

6 RSub   Subtract reals    operand1, operand2 result

7 RMult  Multiply reals    operand1, operand2 result

8 RDiv   Divide reals     operand1, operand2 result

9 Alloc   Allocate memory block size      base address

10 Dealloc  Deallocate memory block base address    -

11 MakeBit  Make singleton bitset  bit number    { bit number }

12 MakeBits  Make range bitset   lowBit, highBit   { lowBit .. highBit }