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 ;;; On non-gencgc we need large dynamic and static spaces for PURIFY
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
)
98 (def!constant linkage-table-space-start
#x0a000000
)
99 (def!constant linkage-table-space-end
#x0b000000
))
101 ;;; While on gencgc we don't.
104 (def!constant read-only-space-start
#x04000000
)
105 (def!constant read-only-space-end
#x040ff000
)
106 (def!constant static-space-start
#x04100000
)
107 (def!constant static-space-end
#x041ff000
)
109 (def!constant linkage-table-space-start
#x04200000
)
110 (def!constant linkage-table-space-end
#x042ff000
))
112 (def!constant linkage-table-entry-size
16)
118 (def!constant dynamic-space-start
#x4f000000
)
119 (def!constant dynamic-space-end
#x7efff000
))
122 (def!constant dynamic-0-space-start
#x4f000000
)
123 (def!constant dynamic-0-space-end
#x66fff000
)
124 (def!constant dynamic-1-space-start
#x67000000
)
125 (def!constant dynamic-1-space-end
#x7efff000
)))
131 (def!constant dynamic-space-start
#x4f000000
)
132 (def!constant dynamic-space-end
#x7efff000
))
135 (def!constant dynamic-0-space-start
#x4f000000
)
136 (def!constant dynamic-0-space-end
#x66fff000
)
137 (def!constant dynamic-1-space-start
#x67000000
)
138 (def!constant dynamic-1-space-end
#x7efff000
)))
144 (def!constant dynamic-space-start
#x10000000
)
145 (def!constant dynamic-space-end
#x6ffff000
))
148 (def!constant dynamic-0-space-start
#x10000000
)
149 (def!constant dynamic-0-space-end
#x3ffff000
)
151 (def!constant dynamic-1-space-start
#x40000000
)
152 (def!constant dynamic-1-space-end
#x6ffff000
)))
154 ;;;; Other miscellaneous constants.
156 (defenum (:suffix -trap
:start
8)
164 fixnum-additive-overflow
168 (defenum (:prefix object-not-
:suffix -trap
:start
24)
172 (defenum (:prefix trace-table-
)
182 ;;; These symbols are loaded into static space directly after NIL so
183 ;;; that the system can compute their address by adding a constant
186 ;;; The fdefn objects for the static functions are loaded into static
187 ;;; space directly after the static symbols. That way, the raw-addr
188 ;;; can be loaded directly out of them by indirecting relative to NIL.
190 (defparameter *static-symbols
*
192 *common-static-symbols
*
193 *c-callable-static-symbols
*
195 #!+gencgc
*restart-lisp-function
*
197 ;; CLH: 20060210 Taken from x86-64/parms.lisp per JES' suggestion
198 ;; Needed for callbacks to work across saving cores. see
199 ;; ALIEN-CALLBACK-ASSEMBLER-WRAPPER in c-call.lisp for gory
201 sb
!alien
::*enter-alien-callback
*)))
203 (defparameter *static-funs
*
217 sb
!kernel
:two-arg-and
218 sb
!kernel
:two-arg-ior
219 sb
!kernel
:two-arg-xor
220 sb
!kernel
:two-arg-eqv
221 sb
!kernel
:two-arg-gcd
222 sb
!kernel
:two-arg-lcm
))
225 ;;;; Assembler parameters:
227 ;;; The number of bits per element in the assemblers code vector.
229 (defparameter *assembly-unit-length
* 8)