-;;;; type testing and checking VOPs for the x86 VM
+;;;; type testing and checking VOPs for the x86-64 VM
;;;; This software is part of the SBCL system. See the README file for
;;;; more information.
\f
;;;; test generation utilities
-;;; Emit the most compact form of the test immediate instruction,
-;;; using an 8 bit test when the immediate is only 8 bits and the
-;;; value is one of the four low registers (eax, ebx, ecx, edx) or the
-;;; control stack.
+;;; Optimize the case of moving a 64-bit value into RAX when not caring
+;;; about the upper 32 bits: often the REX prefix can be spared.
+(defun move-qword-to-eax (value)
+ (if (and (sc-is value any-reg descriptor-reg)
+ (< (tn-offset value) r8-offset))
+ (move eax-tn (make-dword-tn value))
+ (move rax-tn value)))
+
(defun generate-fixnum-test (value)
"zero flag set if VALUE is fixnum"
- (let ((offset (tn-offset value)))
- (cond ((and (sc-is value any-reg descriptor-reg)
- (or (= offset eax-offset) (= offset ebx-offset)
- (= offset ecx-offset) (= offset edx-offset)))
- (inst test (make-random-tn :kind :normal
- :sc (sc-or-lose 'byte-reg)
- :offset offset)
- 7))
- ((sc-is value control-stack)
- (inst test (make-ea :byte :base rbp-tn
- :disp (- (* (1+ offset) n-word-bytes)))
- 7))
- (t
- (inst test value 7)))))
+ (inst test
+ (cond ((sc-is value any-reg descriptor-reg)
+ (make-byte-tn value))
+ ((sc-is value control-stack)
+ (make-ea :byte :base rbp-tn
+ :disp (frame-byte-offset (tn-offset value))))
+ (t
+ value))
+ sb!vm::fixnum-tag-mask))
(defun %test-fixnum (value target not-p)
(generate-fixnum-test value)
(inst jmp :z (if not-p drop-through target))
(%test-headers value target not-p nil headers drop-through)))
-(defun %test-immediate (value target not-p immediate)
+(defun %test-fixnum-and-immediate (value target not-p immediate)
+ (let ((drop-through (gen-label)))
+ (generate-fixnum-test value)
+ (inst jmp :z (if not-p drop-through target))
+ (%test-immediate value target not-p immediate drop-through)))
+
+(defun %test-fixnum-immediate-and-headers (value target not-p immediate
+ headers)
+ (let ((drop-through (gen-label)))
+ (generate-fixnum-test value)
+ (inst jmp :z (if not-p drop-through target))
+ (%test-immediate-and-headers value target not-p immediate headers
+ drop-through)))
+
+(defun %test-immediate (value target not-p immediate
+ &optional (drop-through (gen-label)))
;; Code a single instruction byte test if possible.
- (let ((offset (tn-offset value)))
- (cond ((and (sc-is value any-reg descriptor-reg)
- (or (= offset rax-offset) (= offset rbx-offset)
- (= offset rcx-offset) (= offset rdx-offset)))
- (inst cmp (make-random-tn :kind :normal
- :sc (sc-or-lose 'byte-reg)
- :offset offset)
- immediate))
- (t
- (move rax-tn value)
- (inst cmp al-tn immediate))))
- (inst jmp (if not-p :ne :e) target))
+ (cond ((sc-is value any-reg descriptor-reg)
+ (inst cmp (make-byte-tn value) immediate))
+ (t
+ (move rax-tn value)
+ (inst cmp al-tn immediate)))
+ (inst jmp (if not-p :ne :e) target)
+ (emit-label drop-through))
-(defun %test-lowtag (value target not-p lowtag &optional al-loaded)
- (unless al-loaded
- (move rax-tn value)
- (inst and al-tn lowtag-mask))
+(defun %test-immediate-and-headers (value target not-p immediate headers
+ &optional (drop-through (gen-label)))
+ ;; Code a single instruction byte test if possible.
+ (cond ((sc-is value any-reg descriptor-reg)
+ (inst cmp (make-byte-tn value) immediate))
+ (t
+ (move rax-tn value)
+ (inst cmp al-tn immediate)))
+ (inst jmp :e (if not-p drop-through target))
+ (%test-headers value target not-p nil headers drop-through))
+
+(defun %test-lowtag (value target not-p lowtag)
+ (move-qword-to-eax value)
+ (inst and al-tn lowtag-mask)
(inst cmp al-tn lowtag)
(inst jmp (if not-p :ne :e) target))
(defun %test-headers (value target not-p function-p headers
- &optional (drop-through (gen-label)) al-loaded)
+ &optional (drop-through (gen-label)))
(let ((lowtag (if function-p fun-pointer-lowtag other-pointer-lowtag)))
- (multiple-value-bind (equal less-or-equal when-true when-false)
- ;; EQUAL and LESS-OR-EQUAL are the conditions for branching to TARGET.
- ;; WHEN-TRUE and WHEN-FALSE are the labels to branch to when we know
- ;; it's true and when we know it's false respectively.
- (if not-p
- (values :ne :a drop-through target)
- (values :e :na target drop-through))
- (%test-lowtag value when-false t lowtag al-loaded)
- (inst mov al-tn (make-ea :byte :base value :disp (- lowtag)))
- (do ((remaining headers (cdr remaining)))
- ((null remaining))
- (let ((header (car remaining))
- (last (null (cdr remaining))))
- (cond
- ((atom header)
- (inst cmp al-tn header)
- (if last
- (inst jmp equal target)
- (inst jmp :e when-true)))
- (t
- (let ((start (car header))
- (end (cdr header)))
- (unless (= start bignum-widetag)
- (inst cmp al-tn start)
- (inst jmp :b when-false)) ; was :l
- (inst cmp al-tn end)
- (if last
- (inst jmp less-or-equal target)
- (inst jmp :be when-true))))))) ; was :le
+ (multiple-value-bind (equal less-or-equal greater-or-equal when-true
+ when-false)
+ ;; EQUAL, LESS-OR-EQUAL, and GREATER-OR-EQUAL are the conditions
+ ;; for branching to TARGET. WHEN-TRUE and WHEN-FALSE are the
+ ;; labels to branch to when we know it's true and when we know
+ ;; it's false respectively.
+ (if not-p
+ (values :ne :a :b drop-through target)
+ (values :e :na :nb target drop-through))
+ (%test-lowtag value when-false t lowtag)
+ (do ((remaining headers (cdr remaining))
+ ;; It is preferable (smaller and faster code) to directly
+ ;; compare the value in memory instead of loading it into
+ ;; a register first. Find out if this is possible and set
+ ;; WIDETAG-TN accordingly. If impossible, generate the
+ ;; register load.
+ ;; Compared to x86 we additionally optimize the cases of a
+ ;; range starting with BIGNUM-WIDETAG or ending with
+ ;; COMPLEX-ARRAY-WIDETAG.
+ (widetag-tn (if (and (null (cdr headers))
+ (or (atom (car headers))
+ (= (caar headers) bignum-widetag)
+ (= (cdar headers) complex-array-widetag)))
+ (make-ea :byte :base value :disp (- lowtag))
+ (progn
+ (inst mov eax-tn (make-ea :dword :base value
+ :disp (- lowtag)))
+ al-tn))))
+ ((null remaining))
+ (let ((header (car remaining))
+ (last (null (cdr remaining))))
+ (cond
+ ((atom header)
+ (inst cmp widetag-tn header)
+ (if last
+ (inst jmp equal target)
+ (inst jmp :e when-true)))
+ (t
+ (let ((start (car header))
+ (end (cdr header)))
+ (cond
+ ((= start bignum-widetag)
+ (inst cmp widetag-tn end)
+ (if last
+ (inst jmp less-or-equal target)
+ (inst jmp :be when-true)))
+ ((= end complex-array-widetag)
+ (inst cmp widetag-tn start)
+ (if last
+ (inst jmp greater-or-equal target)
+ (inst jmp :b when-false)))
+ ((not last)
+ (inst cmp al-tn start)
+ (inst jmp :b when-false)
+ (inst cmp al-tn end)
+ (inst jmp :be when-true))
+ (t
+ (inst sub al-tn start)
+ (inst cmp al-tn (- end start))
+ (inst jmp less-or-equal target))))))))
(emit-label drop-through))))
\f
(define-vop (simple-check-type)
(:args (value :target result :scs (any-reg descriptor-reg)))
(:results (result :scs (any-reg descriptor-reg)
- :load-if (not (and (sc-is value any-reg descriptor-reg)
- (sc-is result control-stack)))))
+ :load-if (not (and (sc-is value any-reg descriptor-reg)
+ (sc-is result control-stack)))))
(:vop-var vop)
(:save-p :compute-only))
(:info target not-p)
(:policy :fast-safe))
-(defun cost-to-test-types (type-codes)
- (+ (* 2 (length type-codes))
- (if (> (apply #'max type-codes) lowtag-limit) 7 2)))
-
(defmacro !define-type-vops (pred-name check-name ptype error-code
- (&rest type-codes)
- &key (variant nil variant-p) &allow-other-keys)
+ (&rest type-codes)
+ &key (variant nil variant-p) &allow-other-keys)
;; KLUDGE: UGH. Why do we need this eval? Can't we put this in the
;; expansion?
- (let* ((cost (cost-to-test-types (mapcar #'eval type-codes)))
- (prefix (if variant-p
- (concatenate 'string (string variant) "-")
- "")))
- `(progn
- ,@(when pred-name
- `((define-vop (,pred-name ,(intern (concatenate 'string prefix "TYPE-PREDICATE")))
- (:translate ,pred-name)
- (:generator ,cost
- (test-type value target not-p (,@type-codes))))))
- ,@(when check-name
- `((define-vop (,check-name ,(intern (concatenate 'string prefix "CHECK-TYPE")))
- (:generator ,cost
- (let ((err-lab
- (generate-error-code vop ,error-code value)))
- (test-type value err-lab t (,@type-codes))
- (move result value))))))
- ,@(when ptype
- `((primitive-type-vop ,check-name (:check) ,ptype))))))
+ (flet ((cost-to-test-types (type-codes)
+ (+ (* 2 (length type-codes))
+ (if (> (apply #'max type-codes) lowtag-limit) 7 2))))
+ (let* ((cost (cost-to-test-types (mapcar #'eval type-codes)))
+ (prefix (if variant-p
+ (concatenate 'string (string variant) "-")
+ "")))
+ `(progn
+ ,@(when pred-name
+ `((define-vop (,pred-name ,(intern (concatenate 'string prefix "TYPE-PREDICATE")))
+ (:translate ,pred-name)
+ (:generator ,cost
+ (test-type value target not-p (,@type-codes))))))
+ ,@(when check-name
+ `((define-vop (,check-name ,(intern (concatenate 'string prefix "CHECK-TYPE")))
+ (:generator ,cost
+ (let ((err-lab
+ (generate-error-code vop ',error-code value)))
+ (test-type value err-lab t (,@type-codes))
+ (move result value))))))
+ ,@(when ptype
+ `((primitive-type-vop ,check-name (:check) ,ptype)))))))
\f
;;;; other integer ranges
(:args (value :scs (unsigned-reg)))
(:arg-types unsigned-num)
(:translate fixnump)
- (:temporary (:sc unsigned-reg) tmp)
+ (:temporary (:sc unsigned-reg :from (:argument 0)) tmp)
+ (:info)
+ (:conditional :z)
+ (:generator 5
+ (move tmp value)
+ (inst shr tmp n-positive-fixnum-bits)))
+
+#-#.(cl:if (cl:= sb!vm:n-fixnum-tag-bits 1) '(:and) '(:or))
+(define-vop (fixnump/signed-byte-64 simple-type-predicate)
+ (:args (value :scs (signed-reg)))
+ (:info)
+ (:conditional :z)
+ (:temporary (:sc unsigned-reg :offset eax-offset) eax)
+ (:arg-types signed-num)
+ (:translate fixnump)
(:generator 5
- (inst mov tmp value)
- (inst shr tmp 61)
- (inst jmp (if not-p :nz :z) target)))
+ ;; Hackers Delight, p. 53: signed
+ ;; a <= x <= a + 2^n - 1
+ ;; is equivalent to unsigned
+ ;; ((x-a) >> n) = 0
+ (inst mov rax-tn #.(- sb!xc:most-negative-fixnum))
+ (inst add rax-tn value)
+ (inst shr rax-tn n-fixnum-bits)))
+
+#+#.(cl:if (cl:= sb!vm:n-fixnum-tag-bits 1) '(:and) '(:or))
+(define-vop (fixnump/signed-byte-64 simple-type-predicate)
+ (:args (value :scs (signed-reg) :target temp))
+ (:info)
+ (:conditional :no)
+ (:temporary (:sc unsigned-reg :from (:argument 0)) temp)
+ (:arg-types signed-num)
+ (:translate fixnump)
+ (:generator 5
+ (move temp value)
+ ;; The overflow flag will be set if the reg's sign bit changes.
+ (inst shl temp 1)))
+
+;;; A (SIGNED-BYTE 64) can be represented with either fixnum or a bignum with
+;;; exactly one digit.
-(define-vop (signed-byte-32-p type-predicate)
- (:translate signed-byte-32-p)
+(define-vop (signed-byte-64-p type-predicate)
+ (:translate signed-byte-64-p)
(:generator 45
- ;; (and (fixnum) (no bits set >32))
- (move rax-tn value)
- (inst test rax-tn 7)
- (inst jmp :ne (if not-p target not-target))
- (inst sar rax-tn (+ 32 3))
- (inst jmp (if not-p :nz :z) target)
+ (multiple-value-bind (yep nope)
+ (if not-p
+ (values not-target target)
+ (values target not-target))
+ (generate-fixnum-test value)
+ (inst jmp :e yep)
+ (move-qword-to-eax value)
+ (inst and al-tn lowtag-mask)
+ (inst cmp al-tn other-pointer-lowtag)
+ (inst jmp :ne nope)
+ (inst cmp (make-ea-for-object-slot value 0 other-pointer-lowtag)
+ (+ (ash 1 n-widetag-bits) bignum-widetag))
+ (inst jmp (if not-p :ne :e) target))
NOT-TARGET))
-(define-vop (check-signed-byte-32 check-type)
+(define-vop (check-signed-byte-64 check-type)
(:generator 45
(let ((nope (generate-error-code vop
- object-not-signed-byte-32-error
- value)))
- (move rax-tn value)
- (inst test rax-tn 7)
+ 'object-not-signed-byte-64-error
+ value)))
+ (generate-fixnum-test value)
+ (inst jmp :e yep)
+ (move-qword-to-eax value)
+ (inst and al-tn lowtag-mask)
+ (inst cmp al-tn other-pointer-lowtag)
(inst jmp :ne nope)
- (inst sar rax-tn (+ 32 3))
- (inst jmp :nz nope)
- (move result value))))
-
+ (inst cmp (make-ea-for-object-slot value 0 other-pointer-lowtag)
+ (+ (ash 1 n-widetag-bits) bignum-widetag))
+ (inst jmp :ne nope))
+ YEP
+ (move result value)))
-(define-vop (unsigned-byte-32-p type-predicate)
- (:translate unsigned-byte-32-p)
+;;; An (unsigned-byte 64) can be represented with either a positive
+;;; fixnum, a bignum with exactly one positive digit, or a bignum with
+;;; exactly two digits and the second digit all zeros.
+(define-vop (unsigned-byte-64-p type-predicate)
+ (:translate unsigned-byte-64-p)
(:generator 45
- ;; (and (fixnum) (no bits set >31))
- (move rax-tn value)
- (inst test rax-tn 7)
- (inst jmp :ne (if not-p target not-target))
- (inst sar rax-tn (+ 32 3 -1))
- (inst jmp (if not-p :nz :z) target)
- NOT-TARGET))
+ (let ((not-target (gen-label))
+ (single-word (gen-label))
+ (fixnum (gen-label)))
+ (multiple-value-bind (yep nope)
+ (if not-p
+ (values not-target target)
+ (values target not-target))
+ ;; Is it a fixnum?
+ (generate-fixnum-test value)
+ (move rax-tn value)
+ (inst jmp :e fixnum)
-(define-vop (check-unsigned-byte-32 check-type)
+ ;; If not, is it an other pointer?
+ (inst and al-tn lowtag-mask)
+ (inst cmp al-tn other-pointer-lowtag)
+ (inst jmp :ne nope)
+ ;; Get the header.
+ (loadw rax-tn value 0 other-pointer-lowtag)
+ ;; Is it one?
+ (inst cmp rax-tn (+ (ash 1 n-widetag-bits) bignum-widetag))
+ (inst jmp :e single-word)
+ ;; If it's other than two, we can't be an (unsigned-byte 64)
+ (inst cmp rax-tn (+ (ash 2 n-widetag-bits) bignum-widetag))
+ (inst jmp :ne nope)
+ ;; Get the second digit.
+ (loadw rax-tn value (1+ bignum-digits-offset) other-pointer-lowtag)
+ ;; All zeros, its an (unsigned-byte 64).
+ (inst test rax-tn rax-tn)
+ (inst jmp :z yep)
+ (inst jmp nope)
+
+ (emit-label single-word)
+ ;; Get the single digit.
+ (loadw rax-tn value bignum-digits-offset other-pointer-lowtag)
+
+ ;; positive implies (unsigned-byte 64).
+ (emit-label fixnum)
+ (inst test rax-tn rax-tn)
+ (inst jmp (if not-p :s :ns) target)
+
+ (emit-label not-target)))))
+
+(define-vop (check-unsigned-byte-64 check-type)
(:generator 45
(let ((nope
- (generate-error-code vop object-not-unsigned-byte-32-error value)))
+ (generate-error-code vop 'object-not-unsigned-byte-64-error value))
+ (yep (gen-label))
+ (fixnum (gen-label))
+ (single-word (gen-label)))
+
+ ;; Is it a fixnum?
+ (generate-fixnum-test value)
(move rax-tn value)
- (inst test rax-tn 7)
+ (inst jmp :e fixnum)
+
+ ;; If not, is it an other pointer?
+ (inst and al-tn lowtag-mask)
+ (inst cmp al-tn other-pointer-lowtag)
+ (inst jmp :ne nope)
+ ;; Get the header.
+ (loadw rax-tn value 0 other-pointer-lowtag)
+ ;; Is it one?
+ (inst cmp rax-tn (+ (ash 1 n-widetag-bits) bignum-widetag))
+ (inst jmp :e single-word)
+ ;; If it's other than two, we can't be an (unsigned-byte 64)
+ (inst cmp rax-tn (+ (ash 2 n-widetag-bits) bignum-widetag))
(inst jmp :ne nope)
- (inst sar rax-tn (+ 32 3 -1))
- (inst jmp :nz nope)
+ ;; Get the second digit.
+ (loadw rax-tn value (1+ bignum-digits-offset) other-pointer-lowtag)
+ ;; All zeros, its an (unsigned-byte 64).
+ (inst test rax-tn rax-tn)
+ (inst jmp :z yep)
+ (inst jmp nope)
+
+ (emit-label single-word)
+ ;; Get the single digit.
+ (loadw rax-tn value bignum-digits-offset other-pointer-lowtag)
+
+ ;; positive implies (unsigned-byte 64).
+ (emit-label fixnum)
+ (inst test rax-tn rax-tn)
+ (inst jmp :s nope)
+
+ (emit-label yep)
(move result value))))
+
+(define-vop (check-mod-fixnum check-type)
+ (:info type)
+ (:temporary (:sc any-reg) temp)
+ (:generator 30
+ (let* ((low (numeric-type-low type))
+ (hi (numeric-type-high type))
+ (fixnum-hi (fixnumize hi))
+ (error (gen-label)))
+ ;; FIXME: abstract
+ (assemble (*elsewhere*)
+ (emit-label error)
+ ;; The general case uses the number directly,
+ ;; and it will already have the number constantized
+ ;; even though MOV can use 64-bit immediates,
+ ;; using the same inlined constant will save space
+ (if (= (logcount (1+ hi)) 1)
+ (inst mov temp fixnum-hi)
+ (inst mov temp (constantize fixnum-hi)))
+ (emit-error-break vop error-trap
+ (error-number-or-lose 'object-not-mod-error)
+ (list value temp)))
+ (aver (zerop low))
+ (cond
+ ;; Handle powers of two specially
+ ;; The higher bits and the fixnum tag can be tested in one go
+ ((= (logcount (1+ hi)) 1)
+ (inst test value
+ (constantize (lognot fixnum-hi)))
+ (inst jmp :ne error))
+ (t
+ (generate-fixnum-test value)
+ (inst jmp :ne error)
+ (inst cmp value (constantize fixnum-hi))
+ (inst jmp :a error)))
+ (move result value))))
+
\f
;;;; list/symbol types
;;;
(define-vop (symbolp type-predicate)
(:translate symbolp)
(:generator 12
- (let ((is-symbol-label (if not-p drop-thru target)))
+ (let ((is-symbol-label (if not-p DROP-THRU target)))
(inst cmp value nil-value)
(inst jmp :e is-symbol-label)
(test-type value target not-p (symbol-header-widetag)))
(define-vop (check-symbol check-type)
(:generator 12
- (let ((error (generate-error-code vop object-not-symbol-error value)))
+ (let ((error (generate-error-code vop 'object-not-symbol-error value)))
(inst cmp value nil-value)
- (inst jmp :e drop-thru)
+ (inst jmp :e DROP-THRU)
(test-type value error t (symbol-header-widetag)))
DROP-THRU
(move result value)))
(define-vop (consp type-predicate)
(:translate consp)
(:generator 8
- (let ((is-not-cons-label (if not-p target drop-thru)))
+ (let ((is-not-cons-label (if not-p target DROP-THRU)))
(inst cmp value nil-value)
(inst jmp :e is-not-cons-label)
(test-type value target not-p (list-pointer-lowtag)))
(define-vop (check-cons check-type)
(:generator 8
- (let ((error (generate-error-code vop object-not-cons-error value)))
+ (let ((error (generate-error-code vop 'object-not-cons-error value)))
(inst cmp value nil-value)
(inst jmp :e error)
(test-type value error t (list-pointer-lowtag))
(move result value))))
+
+#!+sb-simd-pack
+(progn
+ (!define-type-vops simd-pack-p nil nil nil (simd-pack-widetag))
+
+ (define-vop (check-simd-pack check-type)
+ (:args (value :target result
+ :scs (any-reg descriptor-reg
+ int-sse-reg single-sse-reg double-sse-reg
+ int-sse-stack single-sse-stack double-sse-stack)))
+ (:results (result :scs (any-reg descriptor-reg
+ int-sse-reg single-sse-reg double-sse-reg)))
+ (:temporary (:sc unsigned-reg :offset eax-offset :to (:result 0)) eax)
+ (:ignore eax)
+ (:vop-var vop)
+ (:node-var node)
+ (:save-p :compute-only)
+ (:generator 50
+ (sc-case value
+ ((int-sse-reg single-sse-reg double-sse-reg
+ int-sse-stack single-sse-stack double-sse-stack)
+ (sc-case result
+ ((int-sse-reg single-sse-reg double-sse-reg)
+ (move result value))
+ ((any-reg descriptor-reg)
+ (with-fixed-allocation (result
+ simd-pack-widetag
+ simd-pack-size
+ node)
+ ;; see *simd-pack-element-types*
+ (storew (fixnumize
+ (sc-case value
+ ((int-sse-reg int-sse-stack) 0)
+ ((single-sse-reg single-sse-stack) 1)
+ ((double-sse-reg double-sse-stack) 2)))
+ result simd-pack-tag-slot other-pointer-lowtag)
+ (let ((ea (make-ea-for-object-slot
+ result simd-pack-lo-value-slot other-pointer-lowtag)))
+ (if (float-simd-pack-p value)
+ (inst movaps ea value)
+ (inst movdqa ea value)))))))
+ ((any-reg descriptor-reg)
+ (let ((leaf (sb!c::tn-leaf value)))
+ (unless (and (sb!c::lvar-p leaf)
+ (csubtypep (sb!c::lvar-type leaf)
+ (specifier-type 'simd-pack)))
+ (test-type
+ value
+ (generate-error-code vop 'object-not-simd-pack-error value)
+ t (simd-pack-widetag))))
+ (sc-case result
+ ((int-sse-reg)
+ (let ((ea (make-ea-for-object-slot
+ value simd-pack-lo-value-slot other-pointer-lowtag)))
+ (inst movdqa result ea)))
+ ((single-sse-reg double-sse-reg)
+ (let ((ea (make-ea-for-object-slot
+ value simd-pack-lo-value-slot other-pointer-lowtag)))
+ (inst movaps result ea)))
+ ((any-reg descriptor-reg)
+ (move result value)))))))
+
+ (primitive-type-vop check-simd-pack (:check) simd-pack-int simd-pack-single simd-pack-double))
projects / sbcl.git / blobdiff