\f
;;;; machine architecture parameters
-(eval-when (:compile-toplevel :load-toplevel :execute)
-
(defconstant word-bits 32
#!+sb-doc
"Number of bits per word where a word holds one lisp descriptor.")
#!+sb-doc
"Number of bytes in a word.")
-) ; EVAL-WHEN
-
-(eval-when (:compile-toplevel :load-toplevel :execute)
(defconstant float-sign-shift 31)
-;; These values were taken from the alpha code. The values for
-;; bias and exponent min/max are not the same as shown in the 486 book.
-;; They may be correct for how Python uses them.
-(defconstant single-float-bias 126) ; Intel says 127
-(defconstant single-float-exponent-byte (byte 8 23))
-(defconstant single-float-significand-byte (byte 23 0))
-;; The 486 book shows the exponent range -126 to +127. The Lisp
-;; code that uses these values seems to want already biased numbers.
+;;; comment from CMU CL:
+;;; These values were taken from the alpha code. The values for
+;;; bias and exponent min/max are not the same as shown in the 486 book.
+;;; They may be correct for how Python uses them.
+(defconstant single-float-bias 126) ; Intel says 127.
+(defconstant-eqx single-float-exponent-byte (byte 8 23) #'equalp)
+(defconstant-eqx single-float-significand-byte (byte 23 0) #'equalp)
+;;; comment from CMU CL:
+;;; The 486 book shows the exponent range -126 to +127. The Lisp
+;;; code that uses these values seems to want already biased numbers.
(defconstant single-float-normal-exponent-min 1)
(defconstant single-float-normal-exponent-max 254)
(defconstant single-float-hidden-bit (ash 1 23))
(defconstant single-float-trapping-nan-bit (ash 1 22))
(defconstant double-float-bias 1022)
-(defconstant double-float-exponent-byte (byte 11 20))
-(defconstant double-float-significand-byte (byte 20 0))
+(defconstant-eqx double-float-exponent-byte (byte 11 20) #'equalp)
+(defconstant-eqx double-float-significand-byte (byte 20 0) #'equalp)
(defconstant double-float-normal-exponent-min 1)
(defconstant double-float-normal-exponent-max #x7FE)
(defconstant double-float-hidden-bit (ash 1 20))
(defconstant double-float-trapping-nan-bit (ash 1 19))
(defconstant long-float-bias 16382)
-(defconstant long-float-exponent-byte (byte 15 0))
-(defconstant long-float-significand-byte (byte 31 0))
+(defconstant-eqx long-float-exponent-byte (byte 15 0) #'equalp)
+(defconstant-eqx long-float-significand-byte (byte 31 0) #'equalp)
(defconstant long-float-normal-exponent-min 1)
(defconstant long-float-normal-exponent-max #x7FFE)
-(defconstant long-float-hidden-bit (ash 1 31)) ; Actually not hidden
+(defconstant long-float-hidden-bit (ash 1 31)) ; actually not hidden
(defconstant long-float-trapping-nan-bit (ash 1 30))
(defconstant single-float-digits
(defconstant long-float-digits
(+ (byte-size long-float-significand-byte) word-bits 1))
-;;; pfw -- from i486 microprocessor programmers reference manual
-(defconstant float-invalid-trap-bit (ash 1 0))
+;;; pfw -- from i486 microprocessor programmer's reference manual
+(defconstant float-invalid-trap-bit (ash 1 0))
(defconstant float-denormal-trap-bit (ash 1 1))
(defconstant float-divide-by-zero-trap-bit (ash 1 2))
(defconstant float-overflow-trap-bit (ash 1 3))
(defconstant float-underflow-trap-bit (ash 1 4))
-(defconstant float-inexact-trap-bit (ash 1 5))
+(defconstant float-inexact-trap-bit (ash 1 5))
(defconstant float-round-to-nearest 0)
(defconstant float-round-to-negative 1)
(defconstant float-round-to-positive 2)
(defconstant float-round-to-zero 3)
-(defconstant float-rounding-mode (byte 2 10))
-(defconstant float-sticky-bits (byte 6 16))
-(defconstant float-traps-byte (byte 6 0))
-(defconstant float-exceptions-byte (byte 6 16))
-(defconstant float-precision-control (byte 2 8))
-(defconstant float-fast-bit 0) ; No fast mode on x86
-
-); EVAL-WHEN
+(defconstant-eqx float-rounding-mode (byte 2 10) #'equalp)
+(defconstant-eqx float-sticky-bits (byte 6 16) #'equalp)
+(defconstant-eqx float-traps-byte (byte 6 0) #'equalp)
+(defconstant-eqx float-exceptions-byte (byte 6 16) #'equalp)
+(defconstant-eqx float-precision-control (byte 2 8) #'equalp)
+(defconstant float-fast-bit 0) ; no fast mode on x86
\f
;;;; description of the target address space
;;; where to put the different spaces
;;;
-;;; FIXME: Couldn't/shouldn't these be DEFCONSTANT instead of DEFPARAMETER?
-;;;
-;;; FIXME: Since SBCL has a different way of distinguishing between target
-;;; and host than the old CMU CL code used, the "TARGET-" prefix is
-;;; redundant. Perhaps each *TARGET-FOO* should become *FOO*, probably
-;;; at the same time that we unscrew the kludgy way that constants are
-;;; duplicated between this file and runtime/x86-validate.h.
-;;;
;;; Note: Mostly these values are black magic, inherited from CMU CL
;;; without any documentation. However, there were a few explanatory
;;; comments in the CMU CL sources:
breakpoint
function-end-breakpoint
single-step-breakpoint)
-;;; FIXME: It'd be nice to replace all the DEFENUMs with something
-;;; a la
+;;; FIXME: It'd be nice to replace all the DEFENUMs with something like
;;; (WITH-DEF-ENUM (:START 8)
;;; (DEF-ENUM HALT-TRAP)
;;; (DEF-ENUM PENDING-INTERRUPT-TRAP)
projects / sbcl.git / blobdiff