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- ;;; -*- Package: RT; Log: c.log -*-
- ;;;
- ;;; **********************************************************************
- ;;; This code was written as part of the CMU Common Lisp project at
- ;;; Carnegie Mellon University, and has been placed in the public
- ;;; domain. If you want to use this code or any part of CMU Common
- ;;; Lisp, please contact Scott Fahlman (Scott.Fahlman@CS.CMU.EDU)
- ;;; **********************************************************************
- ;;;
- ;;; $Header: params.lisp,v 1.12 92/03/10 08:57:55 wlott Exp $
- ;;;
- ;;; This file contains some parameterizations of various VM attributes for the
- ;;; IBM RT. This file is separate from other stuff, so we can compile and
- ;;; load it earlier.
- ;;;
- ;;; Written by Rob MacLachlan
- ;;; Converted to MIPS by William Lott.
- ;;; Converted to IBM RT by William Lott and Bill Chiles.
- ;;;
-
- (in-package "RT")
- (use-package "C")
-
- (export '(word-bits byte-bits word-shift word-bytes float-sign-shift
-
- single-float-bias single-float-exponent-byte
- single-float-significand-byte single-float-normal-exponent-min
- single-float-normal-exponent-max single-float-hidden-bit
- single-float-trapping-nan-bit single-float-digits
-
- double-float-bias double-float-exponent-byte
- double-float-significand-byte double-float-normal-exponent-min
- double-float-normal-exponent-max double-float-hidden-bit
- double-float-trapping-nan-bit double-float-digits
-
- float-underflow-trap-bit float-overflow-trap-bit
- float-imprecise-trap-bit float-invalid-trap-bit
- float-divide-by-zero-trap-bit
-
- ))
-
-
-
- ;;;; Compiler constants.
-
- (eval-when (compile eval load)
-
- #-afpa (progn
- (setf *target-float-hardware* :mc68881)
- (setf (backend-name *target-backend*) "RT")
- (setf (backend-version *target-backend*) "IBM RT/Mach 1.0")
- (setf (backend-fasl-file-type *target-backend*) "rtf")
- (setf (backend-fasl-file-implementation *target-backend*)
- rt-fasl-file-implementation)
- (setf *features* (delete :afpa *features*)))
-
- #+afpa (progn
- (setf *target-float-hardware* :afpa)
- (setf (backend-name *target-backend*) "RT")
- (setf (backend-version *target-backend*) "IBM RT EAPC/Mach 1.0")
- (setf (backend-fasl-file-type *target-backend*) "eapcf")
- (setf (backend-fasl-file-implementation *target-backend*)
- rt-afpa-fasl-file-implementation)
- (pushnew :afpa *features*))
-
- (setf (backend-fasl-file-version *target-backend*) 1)
- (setf (backend-register-save-penalty *target-backend*) 3)
- (setf (backend-byte-order *target-backend*) :big-endian)
-
- ) ;eval-when
-
-
-
- ;;;; Machine Architecture parameters:
-
- (eval-when (compile load eval)
-
- (defconstant word-bits 32
- "Number of bits per word where a word holds one lisp descriptor.")
-
- (defconstant byte-bits 8
- "Number of bits per byte where a byte is the smallest addressable object.")
-
- (defconstant word-shift (1- (integer-length (/ word-bits byte-bits)))
- "Number of bits to shift between word addresses and byte addresses.")
-
- (defconstant word-bytes (/ word-bits byte-bits)
- "Number of bytes in a word.")
-
- (defparameter target-most-positive-fixnum (1- (ash 1 29))
- "most-positive-fixnum in the target architecture.")
-
- (defparameter target-most-negative-fixnum (ash -1 29)
- "most-negative-fixnum in the target architecture.")
-
- (defconstant float-sign-shift 31)
-
- ;;; The exponent min/max values are wrong, I think. The denorm, infinity, etc.
- ;;; info must go in there somewhere.
-
- (defconstant single-float-bias 126)
- (defconstant single-float-exponent-byte (byte 8 23))
- (defconstant single-float-significand-byte (byte 23 0))
- (defconstant single-float-normal-exponent-min 1)
- (defconstant single-float-normal-exponent-max 254)
- (defconstant single-float-hidden-bit (ash 1 23))
- (defconstant single-float-trapping-nan-bit (ash 1 22))
-
- (defconstant double-float-bias 1022)
- (defconstant double-float-exponent-byte (byte 11 20))
- (defconstant double-float-significand-byte (byte 20 0))
- (defconstant double-float-normal-exponent-min 1)
- (defconstant double-float-normal-exponent-max #x7FE)
- (defconstant double-float-hidden-bit (ash 1 20))
- (defconstant double-float-trapping-nan-bit (ash 1 19))
-
- (defconstant single-float-digits
- (+ (byte-size single-float-significand-byte) 1))
-
- (defconstant double-float-digits
- (+ (byte-size double-float-significand-byte) word-bits 1))
-
- ); eval-when
-
-
-
-
- ;;;; Description of the target address space.
-
- (export '(target-read-only-space-start
- target-static-space-start
- target-dynamic-space-start))
-
- ;;; Where to put the different spaces.
- ;;;
- (defparameter target-read-only-space-start #x00100000)
- (defparameter target-static-space-start #x05000000)
- (defparameter target-dynamic-space-start #x07000000)
-
-
-
- ;;;; Other non-type constants.
-
- (export '(halt-trap pending-interrupt-trap error-trap cerror-trap
- breakpoint-trap function-end-breakpoint-trap))
-
- (defenum (:suffix -trap :start 8)
- halt
- pending-interrupt
- error
- cerror
- breakpoint
- function-end-breakpoint)
-
-
-
- ;;;; Static symbols.
-
- (export '(static-symbols exported-static-symbols))
-
-
- ;;; These symbols are loaded into static space directly after NIL so
- ;;; that the system can compute their address by adding a constant
- ;;; amount to NIL.
- ;;;
- ;;; The exported static symbols are a subset of the static symbols that get
- ;;; exported to the C header file. NOTE: EXPORTED-STATIC-SYMBOLS IS DEFINED
- ;;; AS A FUNCTION OF THE ORDERING OF THIS LIST.
- ;;;
- (defparameter static-symbols
- '(t
-
- ;; Random stuff needed for initialization.
- lisp::lisp-environment-list
- lisp::lisp-command-line-list
-
- ;; Functions that C needs to call.
- lisp::%initial-function
- lisp::maybe-gc
- kernel::internal-error
- di::handle-breakpoint
-
- ;; Free Pointers and the like
- lisp::*read-only-space-free-pointer*
- lisp::*static-space-free-pointer*
- lisp::*initial-dynamic-space-free-pointer*
- *allocation-pointer*
- *internal-gc-trigger*
- *binding-stack-pointer*
-
- ;; Things needed for non-local-exit.
- lisp::*current-catch-block*
- lisp::*current-unwind-protect-block*
- *eval-stack-top*
-
- ;; Interrupt Handling
- lisp::*pseudo-atomic-atomic*
- lisp::*pseudo-atomic-interrupted*
- unix::*interrupts-enabled*
- unix::*interrupt-pending*
- lisp::*free-interrupt-context-index*
-
- ;; Static functions.
- two-arg-+ two-arg-- two-arg-* two-arg-/ two-arg-< two-arg-> two-arg-=
- %negate two-arg-and two-arg-ior two-arg-xor
- length two-arg-gcd two-arg-lcm truncate
- ))
-
- (defparameter exported-static-symbols
- (subseq static-symbols 0 (1+ (position 'lisp::*free-interrupt-context-index*
- static-symbols))))
-
-
-
- ;;;; Assembler parameters:
-
- ;;; The number of bits per element in the assemblers code vector.
- ;;;
- (defparameter *assembly-unit-length* 8)
-