src/compiler/hppa/parms.lisp

   1 (in-package "SB!VM")
   2
   3 \f
   4 ;;;; Machine Architecture parameters:
   5
   6 ;;; number of bits per word where a word holds one lisp descriptor
   7 (def!constant n-word-bits 32)
   8
   9 ;;; the natural width of a machine word (as seen in e.g. register width,
  10 ;;; address space)
  11 (def!constant n-machine-word-bits 32)
  12
  13 ;;; number of bits per byte where a byte is the smallest addressable
  14 ;;; object
  15 (def!constant n-byte-bits 8)
  16
  17 (def!constant float-sign-shift 31)
  18
  19 (def!constant single-float-bias 126)
  20 (defconstant-eqx single-float-exponent-byte (byte 8 23) #'equal)
  21 (defconstant-eqx single-float-significand-byte (byte 23 0) #'equal)
  22 (def!constant single-float-normal-exponent-min 1)
  23 (def!constant single-float-normal-exponent-max 254)
  24 (def!constant single-float-hidden-bit (ash 1 23))
  25 (def!constant single-float-trapping-nan-bit (ash 1 22))
  26
  27 (def!constant double-float-bias 1022)
  28 (defconstant-eqx double-float-exponent-byte (byte 11 20) #'equal)
  29 (defconstant-eqx double-float-significand-byte (byte 20 0) #'equal)
  30 (def!constant double-float-normal-exponent-min 1)
  31 (def!constant double-float-normal-exponent-max #x7FE)
  32 (def!constant double-float-hidden-bit (ash 1 20))
  33 (def!constant double-float-trapping-nan-bit (ash 1 19))
  34
  35 (def!constant single-float-digits
  36   (+ (byte-size single-float-significand-byte) 1))
  37
  38 (def!constant double-float-digits
  39   (+ (byte-size double-float-significand-byte) n-word-bits 1))
  40
  41 (def!constant float-inexact-trap-bit (ash 1 0))
  42 (def!constant float-underflow-trap-bit (ash 1 1))
  43 (def!constant float-overflow-trap-bit (ash 1 2))
  44 (def!constant float-divide-by-zero-trap-bit (ash 1 3))
  45 (def!constant float-invalid-trap-bit (ash 1 4))
  46
  47 (def!constant float-round-to-nearest 0)
  48 (def!constant float-round-to-zero 1)
  49 (def!constant float-round-to-positive 2)
  50 (def!constant float-round-to-negative 3)
  51
  52 (defconstant-eqx float-rounding-mode (byte 2 7) #'equal)
  53 (defconstant-eqx float-sticky-bits (byte 5 27) #'equal)
  54 (defconstant-eqx float-traps-byte (byte 5 0) #'equal)
  55 (defconstant-eqx float-exceptions-byte (byte 5 27) #'equal)
  56 (def!constant float-condition-bit (ash 1 26))
  57 (def!constant float-fast-bit 0)                   ; No fast mode on HPPA.
  58
  59
  60 \f
  61 ;;;; Description of the target address space.
  62
  63 ;;; Where to put the different spaces.
  64 ;;;
  65 (def!constant read-only-space-start #x20000000)
  66 (def!constant read-only-space-end   #x24000000)
  67
  68 (def!constant static-space-start    #x28000000)
  69 (def!constant static-space-end      #x2a000000)
  70
  71 (def!constant dynamic-0-space-start   #x30000000)
  72 (def!constant dynamic-0-space-end     #x37fff000)
  73 (def!constant dynamic-1-space-start   #x38000000)
  74 (def!constant dynamic-1-space-end     #x3ffff000)
  75
  76 ;;; FIXME: WTF are these for?
  77
  78 ;; The space-register holding the lisp heap.
  79 (def!constant lisp-heap-space 5)
  80
  81 ;; The space-register holding the C text segment.
  82 (def!constant c-text-space 4)
  83
  84 \f
  85 ;;;; Other random constants.
  86
  87 (defenum (:suffix -trap :start 8)
  88   halt
  89   pending-interrupt
  90   error
  91   cerror
  92   breakpoint
  93   fun-end-breakpoint
  94   single-step-breakpoint)
  95
  96 (defenum (:prefix trace-table-)
  97   normal
  98   call-site
  99   fun-prologue
 100   fun-epilogue)
 101
 102
 103 \f
 104 ;;;; Static symbols.
 105
 106 ;;; These symbols are loaded into static space directly after NIL so
 107 ;;; that the system can compute their address by adding a constant
 108 ;;; amount to NIL.
 109 ;;;
 110 ;;; The fdefn objects for the static functions are loaded into static
 111 ;;; space directly after the static symbols.  That way, the raw-addr
 112 ;;; can be loaded directly out of them by indirecting relative to NIL.
 113 ;;;
 114 (defparameter *static-symbols*
 115   '(t
 116
 117     ;; The C startup code must fill these in.
 118     *posix-argv*
 119
 120     ;; Functions that the C code needs to call
 121     sb!impl::sub-gc
 122     sb!kernel::internal-error
 123     sb!kernel::control-stack-exhausted-error
 124     sb!kernel::undefined-alien-variable-error
 125     sb!kernel::undefined-alien-function-error
 126     sb!di::handle-breakpoint
 127     sb!impl::fdefinition-object
 128
 129     ;; Free Pointers.
 130     *read-only-space-free-pointer*
 131     *static-space-free-pointer*
 132     *initial-dynamic-space-free-pointer*
 133
 134     ;; Things needed for non-local-exit.
 135     *current-catch-block*
 136     *current-unwind-protect-block*
 137
 138     *binding-stack-start*
 139     *control-stack-start*
 140     *control-stack-end*
 141
 142     ;; Interrupt Handling
 143     *free-interrupt-context-index*
 144     sb!unix::*interrupts-enabled*
 145     sb!unix::*interrupt-pending*
 146     ))
 147
 148 (defparameter *static-funs*
 149   '(length
 150     sb!kernel:two-arg-+
 151     sb!kernel:two-arg--
 152     sb!kernel:two-arg-*
 153     sb!kernel:two-arg-/
 154     sb!kernel:two-arg-<
 155     sb!kernel:two-arg->
 156     sb!kernel:two-arg-=
 157     eql
 158     sb!kernel:%negate
 159     sb!kernel:two-arg-and
 160     sb!kernel:two-arg-ior
 161     sb!kernel:two-arg-xor
 162     sb!kernel:two-arg-gcd
 163     sb!kernel:two-arg-lcm
 164     ))