(declare (type bit sign) (type (unsigned-byte 53) sig)
(type (unsigned-byte 11) exp))
(make-double-float (dpb exp sb!vm:double-float-exponent-byte
- (dpb (ash sig -32) sb!vm:double-float-significand-byte
+ (dpb (ash sig -32)
+ sb!vm:double-float-significand-byte
(if (zerop sign) 0 -1)))
(ldb (byte 32 0) sig)))
#!+(and long-float x86)
(make-long-float (logior (ash sign 15) exp)
(ldb (byte 32 32) sig)
(ldb (byte 32 0) sig)))
-
+
) ; EVAL-WHEN
\f
;;;; float parameters
(defconstant least-negative-short-float least-negative-single-float)
(defconstant least-positive-double-float (double-from-bits 0 0 1))
#!-long-float
-(defconstant least-positive-long-float least-positive-double-float)
+(defconstant least-positive-long-float (double-from-bits 0 0 1))
#!+(and long-float x86)
(defconstant least-positive-long-float (long-from-bits 0 0 1))
(defconstant least-negative-double-float (double-from-bits 1 0 1))
#!-long-float
-(defconstant least-negative-long-float least-negative-double-float)
+(defconstant least-negative-long-float (double-from-bits 1 0 1))
#!+(and long-float x86)
(defconstant least-negative-long-float (long-from-bits 1 0 1))
(and (zerop (ldb sb!vm:long-float-exponent-byte (long-float-exp-bits x)))
(not (zerop x))))))
-(macrolet ((def (name doc single double #!+(and long-float x86) long)
- `(defun ,name (x)
- ,doc
- (number-dispatch ((x float))
- ((single-float)
- (let ((bits (single-float-bits x)))
- (and (> (ldb sb!vm:single-float-exponent-byte bits)
- sb!vm:single-float-normal-exponent-max)
- ,single)))
- ((double-float)
- (let ((hi (double-float-high-bits x))
- (lo (double-float-low-bits x)))
- (declare (ignorable lo))
- (and (> (ldb sb!vm:double-float-exponent-byte hi)
- sb!vm:double-float-normal-exponent-max)
- ,double)))
- #!+(and long-float x86)
- ((long-float)
- (let ((exp (long-float-exp-bits x))
- (hi (long-float-high-bits x))
- (lo (long-float-low-bits x)))
- (declare (ignorable lo))
- (and (> (ldb sb!vm:long-float-exponent-byte exp)
- sb!vm:long-float-normal-exponent-max)
- ,long)))))))
-
- (def float-infinity-p
- "Return true if the float X is an infinity (+ or -)."
- (zerop (ldb sb!vm:single-float-significand-byte bits))
- (and (zerop (ldb sb!vm:double-float-significand-byte hi))
- (zerop lo))
- #!+(and long-float x86)
- (and (zerop (ldb sb!vm:long-float-significand-byte hi))
- (zerop lo)))
-
- (def float-nan-p
- "Return true if the float X is a NaN (Not a Number)."
- (not (zerop (ldb sb!vm:single-float-significand-byte bits)))
- (or (not (zerop (ldb sb!vm:double-float-significand-byte hi)))
- (not (zerop lo)))
- #!+(and long-float x86)
- (or (not (zerop (ldb sb!vm:long-float-significand-byte hi)))
- (not (zerop lo))))
-
- (def float-trapping-nan-p
- "Return true if the float X is a trapping NaN (Not a Number)."
- (zerop (logand (ldb sb!vm:single-float-significand-byte bits)
- sb!vm:single-float-trapping-nan-bit))
- (zerop (logand (ldb sb!vm:double-float-significand-byte hi)
- sb!vm:double-float-trapping-nan-bit))
- #!+(and long-float x86)
- (zerop (logand (ldb sb!vm:long-float-significand-byte hi)
- sb!vm:long-float-trapping-nan-bit))))
+(defmacro !define-float-dispatching-function
+ (name doc single double #!+(and long-float x86) long)
+ `(defun ,name (x)
+ ,doc
+ (number-dispatch ((x float))
+ ((single-float)
+ (let ((bits (single-float-bits x)))
+ (and (> (ldb sb!vm:single-float-exponent-byte bits)
+ sb!vm:single-float-normal-exponent-max)
+ ,single)))
+ ((double-float)
+ (let ((hi (double-float-high-bits x))
+ (lo (double-float-low-bits x)))
+ (declare (ignorable lo))
+ (and (> (ldb sb!vm:double-float-exponent-byte hi)
+ sb!vm:double-float-normal-exponent-max)
+ ,double)))
+ #!+(and long-float x86)
+ ((long-float)
+ (let ((exp (long-float-exp-bits x))
+ (hi (long-float-high-bits x))
+ (lo (long-float-low-bits x)))
+ (declare (ignorable lo))
+ (and (> (ldb sb!vm:long-float-exponent-byte exp)
+ sb!vm:long-float-normal-exponent-max)
+ ,long))))))
+
+(!define-float-dispatching-function float-infinity-p
+ "Return true if the float X is an infinity (+ or -)."
+ (zerop (ldb sb!vm:single-float-significand-byte bits))
+ (and (zerop (ldb sb!vm:double-float-significand-byte hi))
+ (zerop lo))
+ #!+(and long-float x86)
+ (and (zerop (ldb sb!vm:long-float-significand-byte hi))
+ (zerop lo)))
+
+(!define-float-dispatching-function float-nan-p
+ "Return true if the float X is a NaN (Not a Number)."
+ (not (zerop (ldb sb!vm:single-float-significand-byte bits)))
+ (or (not (zerop (ldb sb!vm:double-float-significand-byte hi)))
+ (not (zerop lo)))
+ #!+(and long-float x86)
+ (or (not (zerop (ldb sb!vm:long-float-significand-byte hi)))
+ (not (zerop lo))))
+
+(!define-float-dispatching-function float-trapping-nan-p
+ "Return true if the float X is a trapping NaN (Not a Number)."
+ (zerop (logand (ldb sb!vm:single-float-significand-byte bits)
+ sb!vm:single-float-trapping-nan-bit))
+ (zerop (logand (ldb sb!vm:double-float-significand-byte hi)
+ sb!vm:double-float-trapping-nan-bit))
+ #!+(and long-float x86)
+ (zerop (logand (ldb sb!vm:long-float-significand-byte hi)
+ sb!vm:long-float-trapping-nan-bit)))
;;; If denormalized, use a subfunction from INTEGER-DECODE-FLOAT to find the
;;; actual exponent (and hence how denormalized it is), otherwise we just
(defun float-sign (float1 &optional (float2 (float 1 float1)))
#!+sb-doc
"Return a floating-point number that has the same sign as
- float1 and, if float2 is given, has the same absolute value
- as float2."
+ FLOAT1 and, if FLOAT2 is given, has the same absolute value
+ as FLOAT2."
(declare (float float1 float2))
(* (if (etypecase float1
(single-float (minusp (single-float-bits float1)))
(defun float-radix (x)
#!+sb-doc
"Return (as an integer) the radix b of its floating-point argument."
- ;; ANSI says this function "should signal an error if [..] argument
- ;; is not a float". Since X is otherwise ignored, Python doesn't
- ;; check the type by default, so we have to do it ourself:
- (unless (floatp x)
- (error 'type-error :datum x :expected-type 'float))
2)
\f
;;;; INTEGER-DECODE-FLOAT and DECODE-FLOAT
(t
(values (logior sig sb!vm:single-float-hidden-bit) biased sign)))))
-;;; Like INTEGER-DECODE-SINGLE-DENORM, only doubly so.
+;;; like INTEGER-DECODE-SINGLE-DENORM, only doubly so
(defun integer-decode-double-denorm (x)
(declare (type double-float x))
(let* ((high-bits (double-float-high-bits (abs x)))
(truly-the fixnum (- biased extra-bias))
sign)))))
-;;; Like INTEGER-DECODE-SINGLE-FLOAT, only doubly so.
+;;; like INTEGER-DECODE-SINGLE-FLOAT, only doubly so
(defun integer-decode-double-float (x)
(declare (double-float x))
(let* ((abs (abs x))
bits))
biased sign)))))
-;;; Like DECODE-SINGLE-DENORM, only doubly so.
+;;; like DECODE-SINGLE-DENORM, only doubly so
(defun decode-double-denorm (x)
(declare (double-float x))
(multiple-value-bind (sig exp sign) (integer-decode-double-denorm x)
(truly-the fixnum (+ exp sb!vm:double-float-digits))
(float sign x))))
-;;; Like DECODE-SINGLE-FLOAT, only doubly so.
+;;; like DECODE-SINGLE-FLOAT, only doubly so
(defun decode-double-float (x)
(declare (double-float x))
(let* ((abs (abs x))
projects / sbcl.git / blobdiff