4 ;;;; Machine Architecture parameters:
6 ;;; number of bits per word where a word holds one lisp descriptor
7 (def!constant n-word-bits
32)
9 ;;; the natural width of a machine word (as seen in e.g. register width,
11 (def!constant n-machine-word-bits
32)
13 ;;; number of bits per byte where a byte is the smallest addressable
15 (def!constant n-byte-bits
8)
17 (def!constant float-sign-shift
31)
19 (def!constant single-float-bias
126)
20 (defconstant-eqx single-float-exponent-byte
(byte 8 23) #'equal
)
21 (defconstant-eqx single-float-significand-byte
(byte 23 0) #'equal
)
22 (def!constant single-float-normal-exponent-min
1)
23 (def!constant single-float-normal-exponent-max
254)
24 (def!constant single-float-hidden-bit
(ash 1 23))
25 (def!constant single-float-trapping-nan-bit
(ash 1 22))
27 (def!constant double-float-bias
1022)
28 (defconstant-eqx double-float-exponent-byte
(byte 11 20) #'equal
)
29 (defconstant-eqx double-float-significand-byte
(byte 20 0) #'equal
)
30 (def!constant double-float-normal-exponent-min
1)
31 (def!constant double-float-normal-exponent-max
#x7FE
)
32 (def!constant double-float-hidden-bit
(ash 1 20))
33 (def!constant double-float-trapping-nan-bit
(ash 1 19))
35 (def!constant single-float-digits
36 (+ (byte-size single-float-significand-byte
) 1))
38 (def!constant double-float-digits
39 (+ (byte-size double-float-significand-byte
) n-word-bits
1))
41 (def!constant float-inexact-trap-bit
(ash 1 0))
42 (def!constant float-underflow-trap-bit
(ash 1 1))
43 (def!constant float-overflow-trap-bit
(ash 1 2))
44 (def!constant float-divide-by-zero-trap-bit
(ash 1 3))
45 (def!constant float-invalid-trap-bit
(ash 1 4))
47 (def!constant float-round-to-nearest
0)
48 (def!constant float-round-to-zero
1)
49 (def!constant float-round-to-positive
2)
50 (def!constant float-round-to-negative
3)
52 (defconstant-eqx float-rounding-mode
(byte 2 7) #'equal
)
53 (defconstant-eqx float-sticky-bits
(byte 5 27) #'equal
)
54 (defconstant-eqx float-traps-byte
(byte 5 0) #'equal
)
55 (defconstant-eqx float-exceptions-byte
(byte 5 27) #'equal
)
56 (def!constant float-condition-bit
(ash 1 26))
57 (def!constant float-fast-bit
0) ; No fast mode on HPPA.
61 ;;;; Description of the target address space.
63 ;;; Where to put the different spaces.
65 (def!constant read-only-space-start
#x20000000
)
66 (def!constant read-only-space-end
#x24000000
)
68 (def!constant static-space-start
#x28000000
)
69 (def!constant static-space-end
#x2a000000
)
71 (def!constant dynamic-0-space-start
#x30000000
)
72 (def!constant dynamic-0-space-end
#x37fff000
)
73 (def!constant dynamic-1-space-start
#x38000000
)
74 (def!constant dynamic-1-space-end
#x3ffff000
)
76 ;;; FIXME: WTF are these for?
78 ;; The space-register holding the lisp heap.
79 (def!constant lisp-heap-space
5)
81 ;; The space-register holding the C text segment.
82 (def!constant c-text-space
4)
85 ;;;; Other random constants.
87 (defenum (:suffix -trap
:start
8)
94 single-step-breakpoint
)
96 (defenum (:prefix trace-table-
)
106 ;;; These symbols are loaded into static space directly after NIL so
107 ;;; that the system can compute their address by adding a constant
110 ;;; The fdefn objects for the static functions are loaded into static
111 ;;; space directly after the static symbols. That way, the raw-addr
112 ;;; can be loaded directly out of them by indirecting relative to NIL.
114 (defparameter *static-symbols
*
117 ;; The C startup code must fill these in.
120 ;; Functions that the C code needs to call
122 sb
!kernel
::internal-error
123 sb
!kernel
::control-stack-exhausted-error
124 sb
!kernel
::undefined-alien-variable-error
125 sb
!kernel
::undefined-alien-function-error
126 sb
!di
::handle-breakpoint
127 sb
!impl
::fdefinition-object
130 *read-only-space-free-pointer
*
131 *static-space-free-pointer
*
132 *initial-dynamic-space-free-pointer
*
134 ;; Things needed for non-local-exit.
135 *current-catch-block
*
136 *current-unwind-protect-block
*
138 *binding-stack-start
*
139 *control-stack-start
*
142 ;; Interrupt Handling
143 *free-interrupt-context-index
*
144 sb
!unix
::*interrupts-enabled
*
145 sb
!unix
::*interrupt-pending
*
149 (defparameter *static-funs
*
160 sb
!kernel
:two-arg-and
161 sb
!kernel
:two-arg-ior
162 sb
!kernel
:two-arg-xor
163 sb
!kernel
:two-arg-gcd
164 sb
!kernel
:two-arg-lcm