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|
;;;; vectors.lisp -- signed/unsigned byte accessors
(cl:in-package :nibbles)
(declaim (inline array-data-and-offsets))
(defun array-data-and-offsets (v start end)
"Like ARRAY-DISPLACEMENT, only more useful."
#+cmu
(lisp::with-array-data ((v v) (start start) (end end))
(values v start end))
#+sbcl
(sb-kernel:with-array-data ((v v) (start start) (end end))
(values v start end))
#-(or cmu sbcl)
(values v start (or end (length v))))
(macrolet ((define-fetcher (bitsize signedp big-endian-p)
(let ((ref-name (byte-ref-fun-name bitsize signedp big-endian-p))
(bytes (truncate bitsize 8)))
`(defun ,ref-name (vector index)
(declare (type octet-vector vector))
(declare (type (integer 0 ,(- array-dimension-limit bytes)) index))
(multiple-value-bind (vector start end)
(array-data-and-offsets vector index (+ index ,bytes))
#+sbcl (declare (optimize (sb-c::insert-array-bounds-checks 0)))
(declare (type (integer 0 ,(- array-dimension-limit bytes)) start))
(declare (ignore end))
,(ref-form 'vector 'start bytes signedp big-endian-p)))))
(define-storer (bitsize signedp big-endian-p)
(let ((ref-name (byte-ref-fun-name bitsize signedp big-endian-p))
(set-name (byte-set-fun-name bitsize signedp big-endian-p))
(bytes (truncate bitsize 8)))
`(progn
(defun ,set-name (vector index value)
(declare (type octet-vector vector))
(declare (type (integer 0 ,(- array-dimension-limit bytes)) index))
(declare (type (,(if signedp
'signed-byte
'unsigned-byte) ,bitsize) value))
(multiple-value-bind (vector start end)
(array-data-and-offsets vector index (+ index ,bytes))
#+sbcl (declare (optimize (sb-c::insert-array-bounds-checks 0)))
(declare (type (integer 0 ,(- array-dimension-limit bytes)) start))
(declare (ignore end))
,(set-form 'vector 'start 'value bytes big-endian-p)))
(defsetf ,ref-name ,set-name))))
(define-fetchers-and-storers (bitsize)
(loop for i from 0 below 4
for signedp = (logbitp 1 i)
for big-endian-p = (logbitp 0 i)
collect `(define-fetcher ,bitsize ,signedp ,big-endian-p) into forms
collect `(define-storer ,bitsize ,signedp ,big-endian-p) into forms
finally (return `(progn ,@forms)))))
(define-fetchers-and-storers 16)
(define-fetchers-and-storers 32)
(define-fetchers-and-storers 64))
(defun not-supported ()
(error "not supported"))
#+sbcl (declaim (sb-ext:maybe-inline ieee-single-ref/be))
(defun ieee-single-ref/be (vector index)
(declare (ignorable vector index))
#+abcl
(system::make-single-float (sb32ref/be vector index))
#+allegro
(let ((high (ub16ref/be vector index))
(low (ub16ref/be vector (+ index 2))))
(excl:shorts-to-single-float high low))
#+ccl
(ccl::host-single-float-from-unsigned-byte-32 (ub32ref/be vector index))
#+cmu
(kernel:make-single-float (sb32ref/be vector index))
#+lispworks
(let* ((ub (ub32ref/be vector index))
(v (sys:make-typed-aref-vector 4)))
(declare (optimize (speed 3) (float 0) (safety 0)))
(declare (dynamic-extent v))
(setf (sys:typed-aref '(unsigned-byte 32) v 0) ub)
(sys:typed-aref 'single-float v 0))
#+sbcl
(sb-kernel:make-single-float (sb32ref/be vector index))
#-(or abcl allegro ccl cmu lispworks sbcl)
(not-supported))
#+sbcl (declaim (sb-ext:maybe-inline ieee-single-sef/be))
(defun ieee-single-set/be (vector index value)
(declare (ignorable value vector index))
#+abcl
(progn
(setf (sb32ref/be vector index) (system:single-float-bits value))
value)
#+allegro
(multiple-value-bind (high low) (excl:single-float-to-shorts value)
(setf (ub16ref/be vector index) high
(ub16ref/be vector (+ index 2)) low)
value)
#+ccl
(progn
(setf (ub32ref/be vector index) (ccl::single-float-bits value))
value)
#+cmu
(progn
(setf (sb32ref/be vector index) (kernel:single-float-bits value))
value)
#+lispworks
(let* ((v (sys:make-typed-aref-vector 4)))
(declare (optimize (speed 3) (float 0) (safety 0)))
(declare (dynamic-extent v))
(setf (sys:typed-aref 'single-float v 0) value)
(setf (ub32ref/be vector index) (sys:typed-aref '(unsigned-byte 32) v 0))
value)
#+sbcl
(progn
(setf (sb32ref/be vector index) (sb-kernel:single-float-bits value))
value)
#-(or abcl allegro ccl cmu lispworks sbcl)
(not-supported))
(defsetf ieee-single-ref/be ieee-single-set/be)
#+sbcl (declaim (sb-ext:maybe-inline ieee-single-ref/le))
(defun ieee-single-ref/le (vector index)
(declare (ignorable vector index))
#+abcl
(system::make-single-float (sb32ref/le vector index))
#+allegro
(let ((low (ub16ref/le vector index))
(high (ub16ref/le vector (+ index 2))))
(excl:shorts-to-single-float high low))
#+ccl
(ccl::host-single-float-from-unsigned-byte-32 (ub32ref/le vector index))
#+cmu
(kernel:make-single-float (sb32ref/le vector index))
#+lispworks
(let* ((ub (ub32ref/le vector index))
(v (sys:make-typed-aref-vector 4)))
(declare (optimize (speed 3) (float 0) (safety 0)))
(declare (dynamic-extent v))
(setf (sys:typed-aref '(unsigned-byte 32) v 0) ub)
(sys:typed-aref 'single-float v 0))
#+sbcl
(sb-kernel:make-single-float (sb32ref/le vector index))
#-(or abcl allegro ccl cmu lispworks sbcl)
(not-supported))
#+sbcl (declaim (sb-ext:maybe-inline ieee-single-set/le))
(defun ieee-single-set/le (vector index value)
(declare (ignorable value vector index))
#+abcl
(progn
(setf (sb32ref/le vector index) (system:single-float-bits value))
value)
#+allegro
(multiple-value-bind (high low) (excl:single-float-to-shorts value)
(setf (ub16ref/le vector index) low
(ub16ref/le vector (+ index 2)) high)
value)
#+ccl
(progn
(setf (ub32ref/le vector index) (ccl::single-float-bits value))
value)
#+cmu
(progn
(setf (sb32ref/le vector index) (kernel:single-float-bits value))
value)
#+lispworks
(let* ((v (sys:make-typed-aref-vector 4)))
(declare (optimize (speed 3) (float 0) (safety 0)))
(declare (dynamic-extent v))
(setf (sys:typed-aref 'single-float v 0) value)
(setf (ub32ref/le vector index) (sys:typed-aref '(unsigned-byte 32) v 0))
value)
#+sbcl
(progn
(setf (sb32ref/le vector index) (sb-kernel:single-float-bits value))
value)
#-(or abcl allegro ccl cmu lispworks sbcl)
(not-supported))
(defsetf ieee-single-ref/le ieee-single-set/le)
#+sbcl (declaim (sb-ext:maybe-inline ieee-double-ref/be))
(defun ieee-double-ref/be (vector index)
(declare (ignorable vector index))
#+abcl
(let ((upper (sb32ref/be vector index))
(lower (ub32ref/be vector (+ index 4))))
(system:make-double-float (logior (ash upper 32) lower)))
#+allegro
(let ((u3 (ub16ref/be vector index))
(u2 (ub16ref/be vector (+ index 2)))
(u1 (ub16ref/be vector (+ index 4)))
(u0 (ub16ref/be vector (+ index 6))))
(excl:shorts-to-double-float u3 u2 u1 u0))
#+ccl
(let ((upper (ub32ref/be vector index))
(lower (ub32ref/be vector (+ index 4))))
(ccl::double-float-from-bits upper lower))
#+cmu
(let ((upper (sb32ref/be vector index))
(lower (ub32ref/be vector (+ index 4))))
(kernel:make-double-float upper lower))
#+sbcl
(let ((upper (sb32ref/be vector index))
(lower (ub32ref/be vector (+ index 4))))
(sb-kernel:make-double-float upper lower))
#-(or abcl allegro ccl cmu sbcl)
(not-supported))
#+sbcl (declaim (sb-ext:maybe-inline ieee-double-set/be))
(defun ieee-double-set/be (vector index value)
(declare (ignorable value vector index))
#+abcl
(progn
(setf (sb32ref/be vector index) (system::double-float-high-bits value)
(ub32ref/be vector (+ index 4)) (system::double-float-low-bits value))
value)
#+allegro
(multiple-value-bind (us3 us2 us1 us0) (excl:double-float-to-shorts value)
(setf (ub16ref/be vector index) us3
(ub16ref/be vector (+ index 2)) us2
(ub16ref/be vector (+ index 4)) us1
(ub16ref/be vector (+ index 6)) us0)
value)
#+ccl
(multiple-value-bind (upper lower) (ccl::double-float-bits value)
(setf (ub32ref/be vector index) upper
(ub32ref/be vector (+ index 4)) lower)
value)
#+cmu
(progn
(setf (sb32ref/be vector index) (kernel:double-float-high-bits value)
(ub32ref/be vector (+ index 4)) (kernel:double-float-low-bits value))
value)
#+sbcl
(progn
(setf (sb32ref/be vector index) (sb-kernel:double-float-high-bits value)
(ub32ref/be vector (+ index 4)) (sb-kernel:double-float-low-bits value))
value)
#-(or abcl allegro ccl cmu sbcl)
(not-supported))
(defsetf ieee-double-ref/be ieee-double-set/be)
#+sbcl (declaim (sb-ext:maybe-inline ieee-double-ref/le))
(defun ieee-double-ref/le (vector index)
(declare (ignorable vector index))
#+abcl
(let ((lower (ub32ref/le vector index))
(upper (sb32ref/le vector (+ index 4))))
(system:make-double-float (logior (ash upper 32) lower)))
#+allegro
(let ((u0 (ub16ref/le vector index))
(u1 (ub16ref/le vector (+ index 2)))
(u2 (ub16ref/le vector (+ index 4)))
(u3 (ub16ref/le vector (+ index 6))))
(excl:shorts-to-double-float u3 u2 u1 u0))
#+ccl
(let ((lower (ub32ref/le vector index))
(upper (ub32ref/le vector (+ index 4))))
(ccl::double-float-from-bits upper lower))
#+cmu
(let ((lower (ub32ref/le vector index))
(upper (sb32ref/le vector (+ index 4))))
(kernel:make-double-float upper lower))
#+sbcl
(let ((lower (ub32ref/le vector index))
(upper (sb32ref/le vector (+ index 4))))
(sb-kernel:make-double-float upper lower))
#-(or abcl allegro ccl cmu sbcl)
(not-supported))
#+sbcl (declaim (sb-ext:maybe-inline ieee-double-set/le))
(defun ieee-double-set/le (vector index value)
(declare (ignorable value vector index))
#+abcl
(progn
(setf (ub32ref/le vector index) (system::double-float-low-bits value)
(sb32ref/le vector (+ index 4)) (system::double-float-high-bits value))
value)
#+allegro
(multiple-value-bind (us3 us2 us1 us0) (excl:double-float-to-shorts value)
(setf (ub16ref/le vector index) us0
(ub16ref/le vector (+ index 2)) us1
(ub16ref/le vector (+ index 4)) us2
(ub16ref/le vector (+ index 6)) us3)
value)
#+ccl
(multiple-value-bind (upper lower) (ccl::double-float-bits value)
(setf (ub32ref/le vector index) lower
(ub32ref/le vector (+ index 4)) upper)
value)
#+cmu
(progn
(setf (ub32ref/le vector index) (kernel:double-float-low-bits value)
(sb32ref/le vector (+ index 4)) (kernel:double-float-high-bits value))
value)
#+sbcl
(progn
(setf (ub32ref/le vector index) (sb-kernel:double-float-low-bits value)
(sb32ref/le vector (+ index 4)) (sb-kernel:double-float-high-bits value))
value)
#-(or abcl allegro ccl cmu sbcl)
(not-supported))
(defsetf ieee-double-ref/le ieee-double-set/le)
|
