dave wrote: > I may have to eat my words. I just looked at one of the .asm routines > and it looked rather well documented. But then that assumes that one > knows 360 assembler. The fortran documentation is terse. > 360 assembler is fairly readable, once you know the basic format of the instructions. They have register-register and register to indexed memory for computations, and the usual conditional branch instructions. Subroutine call/return is ghastly, from the 1950's. To call, you branch and link (BALR) typically using register 14 to store the return address. Return is BR 14, branching back through the register storing the return address. Forgetting to save R14 causes an infinite loop when the outer routine has called another subroutine and then returns to itself.
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