X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcompiler%2Fx86%2Fparms.lisp;h=d7764005a2f83167d75a6e52927a90f99ee32ce6;hb=29a9ccc860532b32c566aec095f570e999a9c52c;hp=29b4dfed3168e31954fc95eab9b9e72c8caea69a;hpb=8fc5fda05f92d69c95b47e4ad7561d91dab18c3e;p=sbcl.git diff --git a/src/compiler/x86/parms.lisp b/src/compiler/x86/parms.lisp index 29b4dfe..d776400 100644 --- a/src/compiler/x86/parms.lisp +++ b/src/compiler/x86/parms.lisp @@ -13,9 +13,6 @@ (in-package "SB!VM") -(file-comment - "$Header$") - ;;; ### Note: we simultaneously use ``word'' to mean a 32 bit quantity ;;; and a 16 bit quantity depending on context. This is because Intel ;;; insists on calling 16 bit things words and 32 bit things @@ -27,107 +24,160 @@ ;;;; 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.") +;;; the number of bits per word, where a word holds one lisp descriptor +(defconstant n-word-bits 32) -(defconstant byte-bits 8 - #!+sb-doc - "Number of bits per byte where a byte is the smallest addressable object.") +;;; the number of bits per byte, where a byte is the smallest +;;; addressable object +(defconstant n-byte-bits 8) -(defconstant word-shift (1- (integer-length (/ word-bits byte-bits))) - #!+sb-doc - "Number of bits to shift between word addresses and byte addresses.") +;;; the number of bits to shift between word addresses and byte addresses +(defconstant word-shift (1- (integer-length (/ n-word-bits n-byte-bits)))) -(defconstant word-bytes (/ word-bits byte-bits) - #!+sb-doc - "Number of bytes in a word.") +;;; the number of bytes in a word +(defconstant n-word-bytes (/ n-word-bits n-byte-bits)) -) ; 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 (+ (byte-size single-float-significand-byte) 1)) (defconstant double-float-digits - (+ (byte-size double-float-significand-byte) word-bits 1)) + (+ (byte-size double-float-significand-byte) n-word-bits 1)) (defconstant long-float-digits - (+ (byte-size long-float-significand-byte) word-bits 1)) + (+ (byte-size long-float-significand-byte) n-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 ;;;; description of the target address space ;;; where to put the different spaces ;;; -;;; FIXME: Couldn't/shouldn't these be DEFCONSTANT instead of DEFPARAMETER? -#!-linux (defparameter *target-read-only-space-start* #x10000000) -#!-linux (defparameter *target-static-space-start* - ;; FIXME: was #x28000000 until RAW's RUN-PROGRAM - ;; patches, why the change? - #x30000000) -#!-linux (defparameter *target-dynamic-space-start* #x48000000) -#!+linux (defparameter *target-read-only-space-start* #x01000000) -#!+linux (defparameter *target-static-space-start* #x05000000) -#!+linux (defparameter *target-dynamic-space-start* #x09000000) +;;; 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: +;;; * On Linux, +;;; ** The space 0x08000000-0x10000000 is "C program and memory allocation". +;;; ** The space 0x40000000-0x48000000 is reserved for shared libs. +;;; ** The space >0xE0000000 is "C stack - Alien stack". +;;; * On FreeBSD, +;;; ** The space 0x0E000000-0x10000000 is "Foreign segment". +;;; ** The space 0x20000000-0x30000000 is reserved for shared libs. +;;; And there have been some changes since the fork from CMU CL: +;;; * The OpenBSD port is new since the fork. We started with +;;; the FreeBSD address map, which actually worked until the +;;; Alpha port patches, for reasons which in retrospect are rather +;;; mysterious. After the Alpha port patches were added, the +;;; OpenBSD port suffered memory corruption problems. While +;;; debugging those, it was discovered that src/runtime/trymap +;;; failed for the control stack region #x40000000-#x47fff000. +;;; After the control stack was moved upward out of this region +;;; (stealing some bytes from dynamic space) the problems went +;;; away. +;;; * The FreeBSD STATIC-SPACE-START value was bumped up from +;;; #x28000000 to #x30000000 when FreeBSD ld.so dynamic linking +;;; support was added for FreeBSD ca. 20000910. This was to keep from +;;; stomping on an address range that the dynamic libraries want to +;;; use. (They want to use this address range even if we try to +;;; reserve it with a call to validate() as the first operation in +;;; main().) + +#!+linux +(progn + + (defconstant read-only-space-start #x01000000) + (defconstant read-only-space-end #x037ff000) + + (defconstant static-space-start #x05000000) + (defconstant static-space-end #x07fff000) + + (defconstant dynamic-space-start #x09000000) + (defconstant dynamic-space-end #x29000000) + + (defconstant control-stack-start #x50000000) + (defconstant control-stack-end #x57fff000) + + (defconstant binding-stack-start #x60000000) + (defconstant binding-stack-end #x67fff000)) + +#!+bsd +(progn + + (defconstant read-only-space-start #x10000000) + (defconstant read-only-space-end #x1ffff000) + + (defconstant static-space-start + #!+freebsd #x30000000 + #!+openbsd #x28000000) + (defconstant static-space-end #x37fff000) + + (defconstant binding-stack-start #x38000000) + (defconstant binding-stack-end #x3ffff000) + + (defconstant control-stack-start + #+freebsd #x40000000 + #+openbsd #x48000000) + (defconstant control-stack-end + #+freebsd #x47fff000 + #+openbsd #x4ffff000) + (defconstant dynamic-space-start + #+freebsd #x48000000 + #+openbsd #x50000000) + (defconstant dynamic-space-end #x88000000)) ;;; Given that NIL is the first thing allocated in static space, we ;;; know its value at compile time: -(defparameter *nil-value* (+ *target-static-space-start* #xb)) +(defconstant nil-value (+ static-space-start #xb)) ;;;; other miscellaneous constants @@ -137,10 +187,9 @@ error cerror breakpoint - function-end-breakpoint + fun-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) @@ -155,8 +204,8 @@ (defenum (:prefix trace-table-) normal call-site - function-prologue - function-epilogue) + fun-prologue + fun-epilogue) ;;;; static symbols @@ -172,8 +221,6 @@ ;;; Note these spaces grow from low to high addresses. (defvar *allocation-pointer*) (defvar *binding-stack-pointer*) -(defvar *x86-cgc-active-p*) ; FIXME: Document this. -(defvar *static-blue-bag* nil) ;;; FIXME: *!INITIAL-FDEFN-OBJECTS* and !COLD-INIT probably don't need ;;; to be in the static symbols table any more. Also, if @@ -186,76 +233,61 @@ sb!impl::*!initial-fdefn-objects* ;; functions that the C code needs to call - sb!impl::!cold-init - sb!impl::maybe-gc + maybe-gc sb!kernel::internal-error sb!di::handle-breakpoint - sb!impl::fdefinition-object + fdefinition-object ;; free pointers - sb!impl::*read-only-space-free-pointer* - sb!impl::*static-space-free-pointer* - sb!impl::*initial-dynamic-space-free-pointer* + ;; + ;; Note that these are FIXNUM word counts, not (as one might + ;; expect) byte counts or SAPs. The reason seems to be that by + ;; representing them this way, we can avoid consing bignums. + ;; -- WHN 2000-10-02 + *read-only-space-free-pointer* + *static-space-free-pointer* + *initial-dynamic-space-free-pointer* ;; things needed for non-local exit - sb!impl::*current-catch-block* - sb!impl::*current-unwind-protect-block* - sb!c::*eval-stack-top* - sb!vm::*alien-stack* + *current-catch-block* + *current-unwind-protect-block* + *eval-stack-top* + *alien-stack* ;; interrupt handling - sb!impl::*pseudo-atomic-atomic* - sb!impl::*pseudo-atomic-interrupted* + *pseudo-atomic-atomic* + *pseudo-atomic-interrupted* sb!unix::*interrupts-enabled* sb!unix::*interrupt-pending* - sb!impl::*free-interrupt-context-index* + *free-interrupt-context-index* - sb!vm::*allocation-pointer* - sb!vm::*binding-stack-pointer* - sb!vm::*internal-gc-trigger* ; Not used. + *allocation-pointer* + *binding-stack-pointer* + *internal-gc-trigger* ; Not used. ;; the floating point constants - sb!vm::*fp-constant-0d0* - sb!vm::*fp-constant-1d0* - sb!vm::*fp-constant-0s0* - sb!vm::*fp-constant-1s0* + *fp-constant-0d0* + *fp-constant-1d0* + *fp-constant-0s0* + *fp-constant-1s0* ;; The following are all long-floats. - sb!vm::*fp-constant-0l0* - sb!vm::*fp-constant-1l0* - sb!vm::*fp-constant-pi* - sb!vm::*fp-constant-l2t* - sb!vm::*fp-constant-l2e* - sb!vm::*fp-constant-lg2* - sb!vm::*fp-constant-ln2* - - ;; used by gencgc - sb!vm::*scavenge-read-only-space* - - ;; multi-process support - sb!vm::*control-stacks* + *fp-constant-0l0* + *fp-constant-1l0* + *fp-constant-pi* + *fp-constant-l2t* + *fp-constant-l2e* + *fp-constant-lg2* + *fp-constant-ln2* ;; The ..SLOT-UNBOUND.. symbol is static in order to optimise the ;; common slot unbound check. - sb!pcl::..slot-unbound.. - - ;; spare symbols - sb!vm::spare-10 - sb!vm::spare-9 - sb!vm::spare-8 - sb!vm::spare-7 - sb!vm::spare-6 - sb!vm::spare-5 - sb!vm::spare-4 - sb!vm::spare-3 - sb!vm::spare-2 - sb!vm::spare-1 - - ;; used by cgc - sb!vm::*x86-cgc-active-p* - sb!vm::*static-blue-bag* ; must be last or change C code - )) - -(defparameter *static-functions* + ;; + ;; FIXME: In SBCL, the CLOS code has become sufficiently tightly + ;; integrated into the system that it'd probably make sense to use + ;; the ordinary unbound marker for this. + sb!pcl::..slot-unbound..)) + +(defparameter *static-funs* '(length sb!kernel:two-arg-+ sb!kernel:two-arg--