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 ;;;; This software is part of the SBCL system. See the README file for
   6 ;;;; more information.
   7 ;;;;
   8 ;;;; This software is derived from the CMU CL system, which was
   9 ;;;; written at Carnegie Mellon University and released into the
  10 ;;;; public domain. The software is in the public domain and is
  11 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
  12 ;;;; files for more information.
  13
  14 (in-package "SB!VM")
  15
  16 ;;; number of bits per word where a word holds one lisp descriptor
  17 (def!constant n-word-bits 32)
  18
  19 ;;; the natural width of a machine word (as seen in e.g. register width,
  20 ;;; address space)
  21 (def!constant n-machine-word-bits 32)
  22
  23 ;;; number of bits per byte where a byte is the smallest addressable
  24 ;;; object
  25 (def!constant n-byte-bits 8)
  26
  27 ;;; flags for the generational garbage collector
  28 (def!constant pseudo-atomic-interrupted-flag 1)
  29 (def!constant pseudo-atomic-flag 4)
  30
  31 (def!constant float-sign-shift 31)
  32
  33 (def!constant single-float-bias 126)
  34 (defconstant-eqx single-float-exponent-byte (byte 8 23) #'equalp)
  35 (defconstant-eqx single-float-significand-byte (byte 23 0) #'equalp)
  36 (def!constant single-float-normal-exponent-min 1)
  37 (def!constant single-float-normal-exponent-max 254)
  38 (def!constant single-float-hidden-bit (ash 1 23))
  39 (def!constant single-float-trapping-nan-bit (ash 1 22))
  40
  41 (def!constant double-float-bias 1022)
  42 (defconstant-eqx double-float-exponent-byte (byte 11 20) #'equalp)
  43 (defconstant-eqx double-float-significand-byte (byte 20 0) #'equalp)
  44 (def!constant double-float-normal-exponent-min 1)
  45 (def!constant double-float-normal-exponent-max #x7FE)
  46 (def!constant double-float-hidden-bit (ash 1 20))
  47 (def!constant double-float-trapping-nan-bit (ash 1 19))
  48
  49 (def!constant single-float-digits
  50   (+ (byte-size single-float-significand-byte) 1))
  51
  52 (def!constant double-float-digits
  53   (+ (byte-size double-float-significand-byte) n-word-bits 1))
  54
  55
  56 (def!constant float-inexact-trap-bit (ash 1 0))
  57 (def!constant float-divide-by-zero-trap-bit (ash 1 1))
  58 (def!constant float-underflow-trap-bit (ash 1 2))
  59 (def!constant float-overflow-trap-bit (ash 1 3))
  60 (def!constant float-invalid-trap-bit (ash 1 4))
  61
  62 (def!constant float-round-to-nearest 0)
  63 (def!constant float-round-to-zero 1)
  64 (def!constant float-round-to-positive 2)
  65 (def!constant float-round-to-negative 3)
  66
  67 (defconstant-eqx float-rounding-mode (byte 2 0) #'equalp)         ; RD
  68 ;;; FIXME I: Beware, all ye who trespass here. Despite its name,
  69 ;;; FLOAT-STICKY-BITS is not the byte specifier for sticky bits in the
  70 ;;; floating point control word. It is more like "accrued exceptions"
  71 ;;; where FLOAT-EXCEPTIONS-BYTE is "current exceptions". Consequently,
  72 ;;; on architectures where there is no "current exceptions"
  73 ;;; FLOAT-EXCEPTIONS-BYTE and FLOAT-STICKY-BITS had better be the
  74 ;;; same.
  75 ;;;
  76 ;;; FIXME II: So, I've now documented this in comments in the PowerPC
  77 ;;; tree. This may not make it easy to find for when new architectures
  78 ;;; get backends written...
  79 ;;;
  80 ;;; CSR, 2002-06-11
  81 (defconstant-eqx float-sticky-bits (byte 5 25) #'equalp)
  82 (defconstant-eqx float-traps-byte (byte 5 3) #'equalp)
  83 (defconstant-eqx float-exceptions-byte (byte 5 25) #'equalp)      ; cexc
  84
  85 (def!constant float-fast-bit 2)         ; Non-IEEE mode
  86
  87 \f
  88 ;;;; Where to put the different spaces.
  89
  90 ;;; On non-gencgc we need large dynamic and static spaces for PURIFY
  91 #!-gencgc
  92 (progn
  93   (def!constant read-only-space-start #x04000000)
  94   (def!constant read-only-space-end   #x07ff8000)
  95   (def!constant static-space-start    #x08000000)
  96   (def!constant static-space-end      #x097fff00)
  97
  98   (def!constant linkage-table-space-start #x0a000000)
  99   (def!constant linkage-table-space-end   #x0b000000))
 100
 101 ;;; While on gencgc we don't.
 102 #!+gencgc
 103 (!gencgc-space-setup #x04000000
 104                      #!+linux   #x4f000000
 105                      #!+netbsd  #x4f000000
 106                      #!+openbsd #x4f000000
 107                      #!+darwin  #x10000000)
 108
 109 (def!constant linkage-table-entry-size 16)
 110
 111 #!+linux
 112 (progn
 113   #!-gencgc
 114   (progn
 115     (def!constant dynamic-0-space-start #x4f000000)
 116     (def!constant dynamic-0-space-end   #x66fff000)
 117     (def!constant dynamic-1-space-start #x67000000)
 118     (def!constant dynamic-1-space-end   #x7efff000)))
 119
 120 #!+netbsd
 121 (progn
 122   #!-gencgc
 123   (progn
 124     (def!constant dynamic-0-space-start #x4f000000)
 125     (def!constant dynamic-0-space-end   #x66fff000)
 126     (def!constant dynamic-1-space-start #x67000000)
 127     (def!constant dynamic-1-space-end   #x7efff000)))
 128
 129 ;;; Text and data segments start at #x01800000.  Range for randomized
 130 ;;; malloc() starts #x20000000 (MAXDSIZ) after end of data seg and
 131 ;;; extends 256 MB.  Use 512 - 64 MB for dynamic space so we can run
 132 ;;; under default resource limits.
 133 ;;; FIXME: MAXDSIZ is a kernel parameter, and can vary as high as 1GB.
 134 ;;; These parameters should probably be tested under such a configuration,
 135 ;;; as rare as it might or might not be.
 136 #!+openbsd
 137 (progn
 138   #!-gencgc
 139   (progn
 140     (def!constant dynamic-0-space-start #x4f000000)
 141     (def!constant dynamic-0-space-end   #x5cfff000)
 142     (def!constant dynamic-1-space-start #x5f000000)
 143     (def!constant dynamic-1-space-end   #x6cfff000)))
 144
 145 #!+darwin
 146 (progn
 147   #!-gencgc
 148   (progn
 149     (def!constant dynamic-0-space-start #x10000000)
 150     (def!constant dynamic-0-space-end   #x3ffff000)
 151
 152     (def!constant dynamic-1-space-start #x40000000)
 153     (def!constant dynamic-1-space-end   #x6ffff000)))
 154 \f
 155 ;;;; Other miscellaneous constants.
 156
 157 (defenum (:start 8)
 158   halt-trap
 159   pending-interrupt-trap
 160   error-trap
 161   cerror-trap
 162   breakpoint-trap
 163   fun-end-breakpoint-trap
 164   after-breakpoint-trap
 165   fixnum-additive-overflow-trap
 166   single-step-around-trap
 167   single-step-before-trap)
 168
 169 (defenum (:start 24)
 170   object-not-list-trap
 171   object-not-instance-trap)
 172 \f
 173 ;;;; Static symbols.
 174
 175
 176 ;;; These symbols are loaded into static space directly after NIL so
 177 ;;; that the system can compute their address by adding a constant
 178 ;;; amount to NIL.
 179 ;;;
 180 ;;; The fdefn objects for the static functions are loaded into static
 181 ;;; space directly after the static symbols.  That way, the raw-addr
 182 ;;; can be loaded directly out of them by indirecting relative to NIL.
 183 ;;;
 184 (defparameter *static-symbols*
 185   (append
 186    *common-static-symbols*
 187    *c-callable-static-symbols*
 188    '(
 189      #!+gencgc *restart-lisp-function*
 190
 191      ;; CLH: 20060210 Taken from x86-64/parms.lisp per JES' suggestion
 192      ;; Needed for callbacks to work across saving cores. see
 193      ;; ALIEN-CALLBACK-ASSEMBLER-WRAPPER in c-call.lisp for gory
 194      ;; details.
 195      sb!alien::*enter-alien-callback*)))
 196
 197 (defparameter *static-funs*
 198   '(length
 199     sb!kernel:two-arg-+
 200     sb!kernel:two-arg--
 201     sb!kernel:two-arg-*
 202     sb!kernel:two-arg-/
 203     sb!kernel:two-arg-<
 204     sb!kernel:two-arg->
 205     sb!kernel:two-arg-=
 206     sb!kernel:two-arg-<=
 207     sb!kernel:two-arg->=
 208     sb!kernel:two-arg-/=
 209     eql
 210     sb!kernel:%negate
 211     sb!kernel:two-arg-and
 212     sb!kernel:two-arg-ior
 213     sb!kernel:two-arg-xor
 214     sb!kernel:two-arg-eqv
 215     sb!kernel:two-arg-gcd
 216     sb!kernel:two-arg-lcm))