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.
5 ;;;; This software is part of the SBCL system. See the README file for
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.
16 ;;; number of bits per word where a word holds one lisp descriptor
17 (def!constant n-word-bits 32)
19 ;;; the natural width of a machine word (as seen in e.g. register width,
21 (def!constant n-machine-word-bits 32)
23 ;;; number of bits per byte where a byte is the smallest addressable
25 (def!constant n-byte-bits 8)
27 ;;; flags for the generational garbage collector
28 (def!constant pseudo-atomic-interrupted-flag 1)
29 (def!constant pseudo-atomic-flag 4)
31 (def!constant float-sign-shift 31)
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))
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))
49 (def!constant single-float-digits
50 (+ (byte-size single-float-significand-byte) 1))
52 (def!constant double-float-digits
53 (+ (byte-size double-float-significand-byte) n-word-bits 1))
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))
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)
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
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...
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
85 (def!constant float-fast-bit 2) ; Non-IEEE mode
88 ;;; Where to put the different spaces.
90 (def!constant read-only-space-start #x04000000)
91 (def!constant read-only-space-end #x07ff8000)
93 (def!constant static-space-start #x08000000)
94 (def!constant static-space-end #x097fff00)
100 (def!constant dynamic-space-start #x4f000000)
101 (def!constant dynamic-space-end #x7efff000))
104 (def!constant dynamic-0-space-start #x4f000000)
105 (def!constant dynamic-0-space-end #x66fff000)
106 (def!constant dynamic-1-space-start #x67000000)
107 (def!constant dynamic-1-space-end #x7efff000))
109 (def!constant linkage-table-space-start #x0a000000)
110 (def!constant linkage-table-space-end #x0b000000)
111 (def!constant linkage-table-entry-size 16))
117 (def!constant dynamic-space-start #x4f000000)
118 (def!constant dynamic-space-end #x7efff000))
121 (def!constant dynamic-0-space-start #x4f000000)
122 (def!constant dynamic-0-space-end #x66fff000)
123 (def!constant dynamic-1-space-start #x67000000)
124 (def!constant dynamic-1-space-end #x7efff000))
126 (def!constant linkage-table-space-start #x0a000000)
127 (def!constant linkage-table-space-end #x0b000000)
128 (def!constant linkage-table-entry-size 16))
134 (def!constant dynamic-space-start #x10000000)
135 (def!constant dynamic-space-end #x6ffff000))
138 (def!constant dynamic-0-space-start #x10000000)
139 (def!constant dynamic-0-space-end #x3ffff000)
141 (def!constant dynamic-1-space-start #x40000000)
142 (def!constant dynamic-1-space-end #x6ffff000))
145 (def!constant linkage-table-space-start #x0a000000)
146 (def!constant linkage-table-space-end #x0b000000)
147 (def!constant linkage-table-entry-size 16))
149 ;;;; Other miscellaneous constants.
151 (defenum (:suffix -trap :start 8)
159 fixnum-additive-overflow
163 (defenum (:prefix object-not- :suffix -trap :start 24)
167 (defenum (:prefix trace-table-)
177 ;;; These symbols are loaded into static space directly after NIL so
178 ;;; that the system can compute their address by adding a constant
181 ;;; The fdefn objects for the static functions are loaded into static
182 ;;; space directly after the static symbols. That way, the raw-addr
183 ;;; can be loaded directly out of them by indirecting relative to NIL.
185 (defparameter *static-symbols*
187 *common-static-symbols*
188 *c-callable-static-symbols*
190 #!+gencgc *restart-lisp-function*
192 ;; CLH: 20060210 Taken from x86-64/parms.lisp per JES' suggestion
193 ;; Needed for callbacks to work across saving cores. see
194 ;; ALIEN-CALLBACK-ASSEMBLER-WRAPPER in c-call.lisp for gory
196 sb!alien::*enter-alien-callback*)))
198 (defparameter *static-funs*
212 sb!kernel:two-arg-and
213 sb!kernel:two-arg-ior
214 sb!kernel:two-arg-xor
215 sb!kernel:two-arg-eqv
216 sb!kernel:two-arg-gcd
217 sb!kernel:two-arg-lcm))
220 ;;;; Assembler parameters:
222 ;;; The number of bits per element in the assemblers code vector.
224 (defparameter *assembly-unit-length* 8)