src/compiler/ppc/parms.lisp

   1 ;;;; This file contains some parameterizations of various VM
   2 ;;;; attributes for the PPC.  This file is separate from other stuff so
   3 ;;;; that it can be compiled and loaded earlier.
   4
   5
   6 (in-package "SB!VM")
   7
   8 (defconstant n-word-bits 32
   9   "Number of bits per word where a word holds one lisp descriptor.")
  10
  11 (defconstant n-byte-bits 8
  12   "Number of bits per byte where a byte is the smallest addressable object.")
  13
  14 (defconstant word-shift (1- (integer-length (/ n-word-bits n-byte-bits)))
  15   "Number of bits to shift between word addresses and byte addresses.")
  16
  17 (defconstant n-word-bytes (/ n-word-bits n-byte-bits)
  18   "Number of bytes in a word.")
  19
  20
  21 (defconstant float-sign-shift 31)
  22
  23 (defconstant single-float-bias 126)
  24 (defconstant-eqx single-float-exponent-byte (byte 8 23) #'equalp)
  25 (defconstant-eqx single-float-significand-byte (byte 23 0) #'equalp)
  26 (defconstant single-float-normal-exponent-min 1)
  27 (defconstant single-float-normal-exponent-max 254)
  28 (defconstant single-float-hidden-bit (ash 1 23))
  29 (defconstant single-float-trapping-nan-bit (ash 1 22))
  30
  31 (defconstant double-float-bias 1022)
  32 (defconstant-eqx double-float-exponent-byte (byte 11 20) #'equalp)
  33 (defconstant-eqx double-float-significand-byte (byte 20 0) #'equalp)
  34 (defconstant double-float-normal-exponent-min 1)
  35 (defconstant double-float-normal-exponent-max #x7FE)
  36 (defconstant double-float-hidden-bit (ash 1 20))
  37 (defconstant double-float-trapping-nan-bit (ash 1 19))
  38
  39 (defconstant single-float-digits
  40   (+ (byte-size single-float-significand-byte) 1))
  41
  42 (defconstant double-float-digits
  43   (+ (byte-size double-float-significand-byte) n-word-bits 1))
  44
  45
  46 (defconstant float-inexact-trap-bit (ash 1 0))
  47 (defconstant float-divide-by-zero-trap-bit (ash 1 1))
  48 (defconstant float-underflow-trap-bit (ash 1 2))
  49 (defconstant float-overflow-trap-bit (ash 1 3))
  50 (defconstant float-invalid-trap-bit (ash 1 4))
  51
  52 (defconstant float-round-to-nearest 0)
  53 (defconstant float-round-to-zero 1)
  54 (defconstant float-round-to-positive 2)
  55 (defconstant float-round-to-negative 3)
  56
  57 (defconstant-eqx float-rounding-mode (byte 2 0) #'equalp)         ; RD
  58 (defconstant-eqx float-sticky-bits (byte 10 19) #'equalp)
  59 (defconstant-eqx float-traps-byte (byte 6 3) #'equalp)
  60 (defconstant-eqx float-exceptions-byte (byte 5 0) #'equalp)       ; cexc
  61
  62 (defconstant float-fast-bit 2)          ; Non-IEEE mode
  63
  64
  65 ;;; NUMBER-STACK-DISPLACEMENT
  66 ;;;
  67 ;;; The number of bytes reserved above the number stack pointer.  These
  68 ;;; slots are required by architecture, mostly (?) to make C backtrace
  69 ;;; work.
  70 ;;;
  71 (defconstant number-stack-displacement
  72   (* 2 sb!vm:n-word-bytes))
  73
  74 \f
  75
  76
  77 ;;; Where to put the different spaces.
  78 ;;;
  79
  80 (defconstant read-only-space-start #x01000000)
  81 (defconstant read-only-space-end   #x04ff8000)
  82
  83 (defconstant binding-stack-start   #x06000000)
  84 (defconstant binding-stack-end     #x06ff0000)
  85
  86 (defconstant control-stack-start   #x07000000)
  87 (defconstant control-stack-end     #x07ff0000)
  88
  89 (defconstant static-space-start    #x08000000)
  90 (defconstant static-space-end      #x097fff00)
  91
  92 ;;; FIXME: this is a gross violation of OAOO, done purely to support
  93 ;;; the #define of DYNAMIC_SPACE_SIZE in validate.c -- CSR, 2002-02-25
  94 ;;; (these numbers should match dynamic-0-*)
  95 (defconstant dynamic-space-start   #x40000000)
  96 (defconstant dynamic-space-end     #x47fff000)
  97
  98 ;;; nothing _seems_ to be using these addresses
  99 (defconstant dynamic-0-space-start #x40000000)
 100 (defconstant dynamic-0-space-end   #x47fff000)
 101 (defconstant dynamic-1-space-start #x48000000)
 102 (defconstant dynamic-1-space-end   #x4ffff000)
 103
 104
 105
 106 \f
 107 ;;;; Other random constants.
 108
 109 (defenum (:suffix -trap :start 8)
 110   halt
 111   pending-interrupt
 112   error
 113   cerror
 114   breakpoint
 115   fun-end-breakpoint
 116   after-breakpoint
 117   fixnum-additive-overflow)
 118
 119 (defenum (:prefix object-not- :suffix -trap :start 16)
 120   list
 121   instance)
 122
 123 (defenum (:prefix trace-table-)
 124   normal
 125   call-site
 126   fun-prologue
 127   fun-epilogue)
 128
 129 \f
 130 ;;;; Static symbols.
 131
 132
 133 ;;; These symbols are loaded into static space directly after NIL so
 134 ;;; that the system can compute their address by adding a constant
 135 ;;; amount to NIL.
 136 ;;;
 137 ;;; The fdefn objects for the static functions are loaded into static
 138 ;;; space directly after the static symbols.  That way, the raw-addr
 139 ;;; can be loaded directly out of them by indirecting relative to NIL.
 140 ;;;
 141 (defparameter *static-symbols*
 142   '(t
 143
 144     ;; The C startup code must fill these in.
 145     *posix-argv*
 146     sb!impl::*initial-fdefn-objects*
 147
 148     ;; Functions that the C code needs to call
 149     ;; sb!impl::%initial-fun
 150     sb!impl::maybe-gc
 151     sb!kernel::internal-error
 152     sb!di::handle-breakpoint
 153     sb!impl::fdefinition-object
 154
 155     ;; Free Pointers.
 156     *read-only-space-free-pointer*
 157     *static-space-free-pointer*
 158     *initial-dynamic-space-free-pointer*
 159
 160     ;; Things needed for non-local-exit.
 161     *current-catch-block*
 162     *current-unwind-protect-block*
 163     *eval-stack-top*
 164
 165     ;; Interrupt Handling
 166     *free-interrupt-context-index*
 167     sb!unix::*interrupts-enabled*
 168     sb!unix::*interrupt-pending*
 169
 170     #|sb!kernel::*current-thread*|#
 171     ))
 172
 173 (defparameter *static-funs*
 174   '(length
 175     sb!kernel:two-arg-+
 176     sb!kernel:two-arg--
 177     sb!kernel:two-arg-*
 178     sb!kernel:two-arg-/
 179     sb!kernel:two-arg-<
 180     sb!kernel:two-arg->
 181     sb!kernel:two-arg-=
 182     sb!kernel:two-arg-<=
 183     sb!kernel:two-arg->=
 184     sb!kernel:two-arg-/=
 185     eql
 186     sb!kernel:%negate
 187     sb!kernel:two-arg-and
 188     sb!kernel:two-arg-ior
 189     sb!kernel:two-arg-xor
 190     sb!kernel:two-arg-gcd
 191     sb!kernel:two-arg-lcm))
 192
 193 \f
 194 ;;;; Assembler parameters:
 195
 196 ;;; The number of bits per element in the assemblers code vector.
 197 ;;;
 198 (defparameter *assembly-unit-length* 8)