X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcompiler%2Ffloat-tran.lisp;h=ec1fabfe9f8aac8c71fc6c06d3f1e3756fdcb41f;hb=80f222325e1f677e5cf8de01c6990906fa47f65d;hp=42f18fa73ada25eccbe5238fd45b8cc4778ba4a6;hpb=10079735369606be93965175c0e2750e1f893824;p=sbcl.git

diff --git a/src/compiler/float-tran.lisp b/src/compiler/float-tran.lisp
index 42f18fa..ec1fabf 100644
--- a/src/compiler/float-tran.lisp
+++ b/src/compiler/float-tran.lisp
@@ -56,10 +56,10 @@
   ;; to let me scan for places that I made this mistake and didn't
   ;; catch myself.
   "use inline (UNSIGNED-BYTE 32) operations"
-  (let ((num-high (numeric-type-high (continuation-type num))))
+  (let ((num-high (numeric-type-high (lvar-type num))))
     (when (null num-high)
       (give-up-ir1-transform))
-    (cond ((constant-continuation-p num)
+    (cond ((constant-lvar-p num)
 	   ;; Check the worst case sum absolute error for the random number
 	   ;; expectations.
 	   (let ((rem (rem (expt 2 32) num-high)))
@@ -137,10 +137,10 @@
   (values double-float-significand double-float-int-exponent (integer -1 1))
   (movable foldable flushable))
 
-(defknown scale-single-float (single-float fixnum) single-float
+(defknown scale-single-float (single-float integer) single-float
   (movable foldable flushable))
 
-(defknown scale-double-float (double-float fixnum) double-float
+(defknown scale-double-float (double-float integer) double-float
   (movable foldable flushable))
 
 (deftransform decode-float ((x) (single-float) *)
@@ -157,14 +157,14 @@
 
 (deftransform scale-float ((f ex) (single-float *) *)
   (if (and #!+x86 t #!-x86 nil
-	   (csubtypep (continuation-type ex)
+	   (csubtypep (lvar-type ex)
 		      (specifier-type '(signed-byte 32))))
       '(coerce (%scalbn (coerce f 'double-float) ex) 'single-float)
       '(scale-single-float f ex)))
 
 (deftransform scale-float ((f ex) (double-float *) *)
   (if (and #!+x86 t #!-x86 nil
-	   (csubtypep (continuation-type ex)
+	   (csubtypep (lvar-type ex)
 		      (specifier-type '(signed-byte 32))))
       '(%scalbn f ex)
       '(scale-double-float f ex)))
@@ -274,10 +274,10 @@
 ;;; rational arithmetic, or different float types, and fix it up. If
 ;;; we don't, he won't even get so much as an efficiency note.
 (deftransform float-contagion-arg1 ((x y) * * :defun-only t :node node)
-  `(,(continuation-fun-name (basic-combination-fun node))
+  `(,(lvar-fun-name (basic-combination-fun node))
     (float x y) y))
 (deftransform float-contagion-arg2 ((x y) * * :defun-only t :node node)
-  `(,(continuation-fun-name (basic-combination-fun node))
+  `(,(lvar-fun-name (basic-combination-fun node))
     x (float y x)))
 
 (dolist (x '(+ * / -))
@@ -298,10 +298,10 @@
 (macrolet ((frob (op)
 	     `(deftransform ,op ((x y) (float rational) *)
 		"open-code FLOAT to RATIONAL comparison"
-		(unless (constant-continuation-p y)
+		(unless (constant-lvar-p y)
 		  (give-up-ir1-transform
 		   "The RATIONAL value isn't known at compile time."))
-		(let ((val (continuation-value y)))
+		(let ((val (lvar-value y)))
 		  (unless (eql (rational (float val)) val)
 		    (give-up-ir1-transform
 		     "~S doesn't have a precise float representation."
@@ -326,17 +326,17 @@
       (setf (fun-info-derive-type (fun-info-or-lose name))
 	    (lambda (call)
 	      (declare (type combination call))
-	      (when (csubtypep (continuation-type
+	      (when (csubtypep (lvar-type
 				(first (combination-args call)))
 			       type)
 		(specifier-type 'float)))))))
 
 #+sb-xc-host ; (See CROSS-FLOAT-INFINITY-KLUDGE.)
 (defoptimizer (log derive-type) ((x &optional y))
-  (when (and (csubtypep (continuation-type x)
+  (when (and (csubtypep (lvar-type x)
 			(specifier-type '(real 0.0)))
 	     (or (null y)
-		 (csubtypep (continuation-type y)
+		 (csubtypep (lvar-type y)
 			    (specifier-type '(real 0.0)))))
     (specifier-type 'float)))
 
@@ -424,7 +424,7 @@
              (declare (ignorable prim-quick))
              `(progn
                 (deftransform ,name ((x) (single-float) *)
-                  #!+x86 (cond ((csubtypep (continuation-type x)
+                  #!+x86 (cond ((csubtypep (lvar-type x)
                                            (specifier-type '(single-float
                                                              (#.(- (expt 2f0 64)))
                                                              (#.(expt 2f0 64)))))
@@ -434,11 +434,11 @@
                                 (compiler-notify
                                  "unable to avoid inline argument range check~@
                                   because the argument range (~S) was not within 2^64"
-                                 (type-specifier (continuation-type x)))
+                                 (type-specifier (lvar-type x)))
                                 `(coerce (,',prim (coerce x 'double-float)) 'single-float)))
                   #!-x86 `(coerce (,',prim (coerce x 'double-float)) 'single-float))
                (deftransform ,name ((x) (double-float) *)
-                 #!+x86 (cond ((csubtypep (continuation-type x)
+                 #!+x86 (cond ((csubtypep (lvar-type x)
                                           (specifier-type '(double-float
                                                             (#.(- (expt 2d0 64)))
                                                             (#.(expt 2d0 64)))))
@@ -447,7 +447,7 @@
                                (compiler-notify
                                 "unable to avoid inline argument range check~@
                                  because the argument range (~S) was not within 2^64"
-                                (type-specifier (continuation-type x)))
+                                (type-specifier (lvar-type x)))
                                `(,',prim x)))
                  #!-x86 `(,',prim x)))))
   (def sin %sin %sin-quick)
@@ -906,17 +906,21 @@
 	((csubtypep y (specifier-type 'integer))
 	 ;; A real raised to an integer power is well-defined.
 	 (merged-interval-expt x y))
+	;; A real raised to a non-integral power can be a float or a
+	;; complex number.
+	((or (csubtypep x (specifier-type '(rational 0)))
+	     (csubtypep x (specifier-type '(float (0d0)))))
+	 ;; But a positive real to any power is well-defined.
+	 (merged-interval-expt x y))
+	((and (csubtypep x (specifier-type 'rational))
+	      (csubtypep x (specifier-type 'rational)))
+	 ;; A rational to the power of a rational could be a rational
+	 ;; or a possibly-complex single float
+	 (specifier-type '(or rational single-float (complex single-float))))
 	(t
-	 ;; A real raised to a non-integral power can be a float or a
-	 ;; complex number.
-	 (cond ((or (csubtypep x (specifier-type '(rational 0)))
-		    (csubtypep x (specifier-type '(float (0d0)))))
-		;; But a positive real to any power is well-defined.
-		(merged-interval-expt x y))
-	       (t
-		;; a real to some power. The result could be a real
-		;; or a complex.
-		(float-or-complex-float-type (numeric-contagion x y)))))))
+	 ;; a real to some power. The result could be a real or a
+	 ;; complex.
+	 (float-or-complex-float-type (numeric-contagion x y)))))
 
 (defoptimizer (expt derive-type) ((x y))
   (two-arg-derive-type x y #'expt-derive-type-aux #'expt))
@@ -1287,7 +1291,7 @@
 ;;; FIXME: ANSI allows any subtype of REAL for the components of COMPLEX.
 ;;; So what if the input type is (COMPLEX (SINGLE-FLOAT 0 1))?
 (defoptimizer (conjugate derive-type) ((num))
-  (continuation-type num))
+  (lvar-type num))
 
 (defoptimizer (cis derive-type) ((num))
   (one-arg-derive-type num
@@ -1342,3 +1346,56 @@
 		    (plusp number)))
 	   (values (1+ tru) (- rem ,defaulted-divisor))
 	   (values tru rem)))))
+
+(defknown %unary-ftruncate (real) float (movable foldable flushable))
+(defknown %unary-ftruncate/single (single-float) single-float
+  (movable foldable flushable))
+(defknown %unary-ftruncate/double (double-float) double-float
+  (movable foldable flushable))
+
+(defun %unary-ftruncate/single (x)
+  (declare (type single-float x))
+  (declare (optimize speed (safety 0)))
+  (let* ((bits (single-float-bits x))
+	 (exp (ldb sb!vm:single-float-exponent-byte bits))
+	 (biased (the single-float-exponent
+		   (- exp sb!vm:single-float-bias))))
+    (declare (type (signed-byte 32) bits))
+    (cond
+      ((= exp sb!vm:single-float-normal-exponent-max) x)
+      ((<= biased 0) (* x 0f0))
+      ((>= biased (float-digits x)) x)
+      (t
+       (let ((frac-bits (- (float-digits x) biased)))
+	 (setf bits (logandc2 bits (- (ash 1 frac-bits) 1)))
+	 (make-single-float bits))))))
+
+(defun %unary-ftruncate/double (x)
+  (declare (type double-float x))
+  (declare (optimize speed (safety 0)))
+  (let* ((high (double-float-high-bits x))
+	 (low (double-float-low-bits x))
+	 (exp (ldb sb!vm:double-float-exponent-byte high))
+	 (biased (the double-float-exponent
+		   (- exp sb!vm:double-float-bias))))
+    (declare (type (signed-byte 32) high)
+	     (type (unsigned-byte 32) low))
+    (cond
+      ((= exp sb!vm:double-float-normal-exponent-max) x)
+      ((<= biased 0) (* x 0d0))
+      ((>= biased (float-digits x)) x)
+      (t
+       (let ((frac-bits (- (float-digits x) biased)))
+	 (cond ((< frac-bits 32)
+		(setf low (logandc2 low (- (ash 1 frac-bits) 1))))
+	       (t
+		(setf low 0)
+		(setf high (logandc2 high (- (ash 1 (- frac-bits 32)) 1)))))
+	 (make-double-float high low))))))
+
+(macrolet
+    ((def (float-type fun)
+	 `(deftransform %unary-ftruncate ((x) (,float-type))
+	    '(,fun x))))
+  (def single-float %unary-ftruncate/single)
+  (def double-float %unary-ftruncate/double))