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)
28 ;;; The size in bytes of the GENCGC pages. Should be a multiple of the
29 ;;; architecture code size.
30 (def!constant gencgc-page-size 4096)
32 ;;; flags for the generational garbage collector
33 (def!constant pseudo-atomic-interrupted-flag 1)
34 (def!constant pseudo-atomic-flag 4)
36 (def!constant float-sign-shift 31)
38 (def!constant single-float-bias 126)
39 (defconstant-eqx single-float-exponent-byte (byte 8 23) #'equalp)
40 (defconstant-eqx single-float-significand-byte (byte 23 0) #'equalp)
41 (def!constant single-float-normal-exponent-min 1)
42 (def!constant single-float-normal-exponent-max 254)
43 (def!constant single-float-hidden-bit (ash 1 23))
44 (def!constant single-float-trapping-nan-bit (ash 1 22))
46 (def!constant double-float-bias 1022)
47 (defconstant-eqx double-float-exponent-byte (byte 11 20) #'equalp)
48 (defconstant-eqx double-float-significand-byte (byte 20 0) #'equalp)
49 (def!constant double-float-normal-exponent-min 1)
50 (def!constant double-float-normal-exponent-max #x7FE)
51 (def!constant double-float-hidden-bit (ash 1 20))
52 (def!constant double-float-trapping-nan-bit (ash 1 19))
54 (def!constant single-float-digits
55 (+ (byte-size single-float-significand-byte) 1))
57 (def!constant double-float-digits
58 (+ (byte-size double-float-significand-byte) n-word-bits 1))
61 (def!constant float-inexact-trap-bit (ash 1 0))
62 (def!constant float-divide-by-zero-trap-bit (ash 1 1))
63 (def!constant float-underflow-trap-bit (ash 1 2))
64 (def!constant float-overflow-trap-bit (ash 1 3))
65 (def!constant float-invalid-trap-bit (ash 1 4))
67 (def!constant float-round-to-nearest 0)
68 (def!constant float-round-to-zero 1)
69 (def!constant float-round-to-positive 2)
70 (def!constant float-round-to-negative 3)
72 (defconstant-eqx float-rounding-mode (byte 2 0) #'equalp) ; RD
73 ;;; FIXME I: Beware, all ye who trespass here. Despite its name,
74 ;;; FLOAT-STICKY-BITS is not the byte specifier for sticky bits in the
75 ;;; floating point control word. It is more like "accrued exceptions"
76 ;;; where FLOAT-EXCEPTIONS-BYTE is "current exceptions". Consequently,
77 ;;; on architectures where there is no "current exceptions"
78 ;;; FLOAT-EXCEPTIONS-BYTE and FLOAT-STICKY-BITS had better be the
81 ;;; FIXME II: So, I've now documented this in comments in the PowerPC
82 ;;; tree. This may not make it easy to find for when new architectures
83 ;;; get backends written...
86 (defconstant-eqx float-sticky-bits (byte 5 25) #'equalp)
87 (defconstant-eqx float-traps-byte (byte 5 3) #'equalp)
88 (defconstant-eqx float-exceptions-byte (byte 5 25) #'equalp) ; cexc
90 (def!constant float-fast-bit 2) ; Non-IEEE mode
93 ;;; Where to put the different spaces.
95 (def!constant read-only-space-start #x01000000)
96 (def!constant read-only-space-end #x04ff8000)
98 (def!constant static-space-start #x08000000)
99 (def!constant static-space-end #x097fff00)
105 (def!constant dynamic-space-start #x50000000)
106 (def!constant dynamic-space-end #x7ffff000))
109 (def!constant dynamic-0-space-start #x50000000)
110 (def!constant dynamic-0-space-end #x67fff000)
111 (def!constant dynamic-1-space-start #x68000000)
112 (def!constant dynamic-1-space-end #x7ffff000))
114 (def!constant linkage-table-space-start #x0a000000)
115 (def!constant linkage-table-space-end #x0b000000)
116 (def!constant linkage-table-entry-size 16))
122 (def!constant dynamic-space-start #x10000000)
123 (def!constant dynamic-space-end #x6ffff000))
126 (def!constant dynamic-0-space-start #x10000000)
127 (def!constant dynamic-0-space-end #x3ffff000)
129 (def!constant dynamic-1-space-start #x40000000)
130 (def!constant dynamic-1-space-end #x6ffff000))
133 (def!constant linkage-table-space-start #x0a000000)
134 (def!constant linkage-table-space-end #x0b000000)
135 (def!constant linkage-table-entry-size 16))
137 ;;;; Other miscellaneous constants.
139 (defenum (:suffix -trap :start 8)
147 fixnum-additive-overflow)
149 (defenum (:prefix object-not- :suffix -trap :start 16)
153 (defenum (:prefix trace-table-)
163 ;;; These symbols are loaded into static space directly after NIL so
164 ;;; that the system can compute their address by adding a constant
167 ;;; The fdefn objects for the static functions are loaded into static
168 ;;; space directly after the static symbols. That way, the raw-addr
169 ;;; can be loaded directly out of them by indirecting relative to NIL.
171 (defparameter *static-symbols*
173 *common-static-symbols*
174 *c-callable-static-symbols*
176 #!+gencgc *restart-lisp-function*
178 ;; CLH: 20060210 Taken from x86-64/parms.lisp per JES' suggestion
179 ;; Needed for callbacks to work across saving cores. see
180 ;; ALIEN-CALLBACK-ASSEMBLER-WRAPPER in c-call.lisp for gory
182 sb!alien::*enter-alien-callback*)))
184 (defparameter *static-funs*
198 sb!kernel:two-arg-and
199 sb!kernel:two-arg-ior
200 sb!kernel:two-arg-xor
201 sb!kernel:two-arg-eqv
202 sb!kernel:two-arg-gcd
203 sb!kernel:two-arg-lcm))
206 ;;;; Assembler parameters:
208 ;;; The number of bits per element in the assemblers code vector.
210 (defparameter *assembly-unit-length* 8)