mdw@git.distorted.org.uk Git - ssr/blob - StraySrc/Libraries/Sapphire/sail/sh/interp

   1 ;
   2 ; interp.sh
   3 ;
   4 ; Main entry point for the interpreter
   5 ;
   6 ; © 1995 Straylight
   7 ;
   8
   9 ;----- Overview -------------------------------------------------------------
  10 ;
  11 ; Functions provided:
  12 ;
  13 ;  interp_start
  14 ;  interp_exec
  15 ;  interp_notImpl
  16 ;  interp_next
  17
  18                 [       :LNOT::DEF:interp__dfn
  19                 GBLL    interp__dfn
  20
  21 ; --- interp_start ---
  22 ;
  23 ; On entry:     R12 == pointer to our anchor block
  24 ;
  25 ; On exit:      R7-R9 == next token
  26 ;
  27 ; Use:          Prepares for execution, and even does some too.
  28
  29                 IMPORT  interp_start
  30
  31 ; --- interp_exec ---
  32 ;
  33 ; On entry:     R7-R9 == token to deal with
  34 ;               R11 == offset in file to execute from
  35 ;               R12 == pointer to the anchor block
  36 ;
  37 ; On exit:      R0 == type code (eg. 0 == we are still executing
  38 ;               R7-R9 == next token to deal with
  39 ;
  40 ; Use:          Executes some of the file.
  41
  42                 IMPORT  interp_exec
  43
  44 ; --- interp_notImpl ---
  45
  46                 IMPORT  interp_notImpl
  47
  48 ; --- interp_next ---
  49 ;
  50 ; On entry:     R7-R9 == token to deal with
  51 ;               R11 == offset in file to execute from
  52 ;               R12 == pointer to the anchor block
  53 ;
  54 ; On exit:      R0 == type code (eg. 0 == we are still executing
  55 ;               R7-R9 == next token to deal with
  56 ;
  57 ; Use:          Checks the next instruction and acts approriately.
  58
  59                 IMPORT  interp_next
  60
  61                 ]
  62
  63 ;----- That's all, folks ----------------------------------------------------
  64
  65                 END