X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcompiler%2Fx86%2Farith.lisp;h=b451680681875a178aba64406025771983b0cad7;hb=e9984509712529c60d1158d44207d6abf11dccce;hp=970b36903a53bf0b0ace5bb0468028091840a94c;hpb=16028d14234d2acd0e6a3145a7364f2a52eabf63;p=sbcl.git

diff --git a/src/compiler/x86/arith.lisp b/src/compiler/x86/arith.lisp
index 970b369..b451680 100644
--- a/src/compiler/x86/arith.lisp
+++ b/src/compiler/x86/arith.lisp
@@ -359,7 +359,7 @@
   (:note "inline fixnum arithmetic")
   (:generator 4
     (move r x)
-    (inst sar r 2)
+    (inst sar r n-fixnum-tag-bits)
     (inst imul r y)))
 
 (define-vop (fast-*-c/fixnum=>fixnum fast-safe-arith-op)
@@ -436,7 +436,7 @@
   (:vop-var vop)
   (:save-p :compute-only)
   (:generator 31
-    (let ((zero (generate-error-code vop division-by-zero-error x y)))
+    (let ((zero (generate-error-code vop 'division-by-zero-error x y)))
       (if (sc-is y any-reg)
           (inst test y y)  ; smaller instruction
           (inst cmp y 0))
@@ -445,8 +445,9 @@
     (inst cdq)
     (inst idiv eax y)
     (if (location= quo eax)
-        (inst shl eax 2)
-        (inst lea quo (make-ea :dword :index eax :scale 4)))
+        (inst shl eax n-fixnum-tag-bits)
+        (inst lea quo (make-ea :dword :index eax
+                               :scale (ash 1 n-fixnum-tag-bits))))
     (move rem edx)))
 
 (define-vop (fast-truncate-c/fixnum=>fixnum fast-safe-arith-op)
@@ -471,8 +472,9 @@
     (inst mov y-arg (fixnumize y))
     (inst idiv eax y-arg)
     (if (location= quo eax)
-        (inst shl eax 2)
-        (inst lea quo (make-ea :dword :index eax :scale 4)))
+        (inst shl eax n-fixnum-tag-bits)
+        (inst lea quo (make-ea :dword :index eax
+                               :scale (ash 1 n-fixnum-tag-bits))))
     (move rem edx)))
 
 (define-vop (fast-truncate/unsigned=>unsigned fast-safe-arith-op)
@@ -491,7 +493,7 @@
   (:vop-var vop)
   (:save-p :compute-only)
   (:generator 33
-    (let ((zero (generate-error-code vop division-by-zero-error x y)))
+    (let ((zero (generate-error-code vop 'division-by-zero-error x y)))
       (if (sc-is y unsigned-reg)
           (inst test y y)  ; smaller instruction
           (inst cmp y 0))
@@ -542,7 +544,7 @@
   (:vop-var vop)
   (:save-p :compute-only)
   (:generator 33
-    (let ((zero (generate-error-code vop division-by-zero-error x y)))
+    (let ((zero (generate-error-code vop 'division-by-zero-error x y)))
       (if (sc-is y signed-reg)
           (inst test y y)  ; smaller instruction
           (inst cmp y 0))
@@ -595,6 +597,8 @@
                                        (location= number result)))))
   (:result-types tagged-num)
   (:note "inline ASH")
+  (:variant nil)
+  (:variant-vars modularp)
   (:generator 2
     (cond ((and (= amount 1) (not (location= number result)))
            (inst lea result (make-ea :dword :base number :index number)))
@@ -605,7 +609,7 @@
           (t
            (move result number)
            (cond ((< -32 amount 32)
-                  ;; this code is used both in ASH and ASH-SMOD30, so
+                  ;; this code is used both in ASH and ASH-MODFX, so
                   ;; be careful
                   (if (plusp amount)
                       (inst shl result amount)
@@ -613,6 +617,9 @@
                         (inst sar result (- amount))
                         (inst and result (lognot fixnum-tag-mask)))))
                  ((plusp amount)
+                  (unless modularp
+                    (aver (not "Impossible: fixnum ASH should not be called with
+constant shift greater than word length")))
                   (if (sc-is result any-reg)
                       (inst xor result result)
                       (inst mov result 0)))
@@ -1009,8 +1016,7 @@
 ;;;; binary conditional VOPs
 
 (define-vop (fast-conditional)
-  (:conditional)
-  (:info target not-p)
+  (:conditional :e)
   (:effects)
   (:affected)
   (:policy :fast-safe))
@@ -1026,7 +1032,7 @@
 (define-vop (fast-conditional-c/fixnum fast-conditional/fixnum)
   (:args (x :scs (any-reg control-stack)))
   (:arg-types tagged-num (:constant (signed-byte 30)))
-  (:info target not-p y))
+  (:info y))
 
 (define-vop (fast-conditional/signed fast-conditional)
   (:args (x :scs (signed-reg)
@@ -1039,7 +1045,7 @@
 (define-vop (fast-conditional-c/signed fast-conditional/signed)
   (:args (x :scs (signed-reg signed-stack)))
   (:arg-types signed-num (:constant (signed-byte 32)))
-  (:info target not-p y))
+  (:info y))
 
 (define-vop (fast-conditional/unsigned fast-conditional)
   (:args (x :scs (unsigned-reg)
@@ -1052,7 +1058,7 @@
 (define-vop (fast-conditional-c/unsigned fast-conditional/unsigned)
   (:args (x :scs (unsigned-reg unsigned-stack)))
   (:arg-types unsigned-num (:constant (unsigned-byte 32)))
-  (:info target not-p y))
+  (:info y))
 
 (macrolet ((define-logtest-vops ()
              `(progn
@@ -1064,12 +1070,12 @@
                        `(define-vop (,(symbolicate "FAST-LOGTEST" suffix)
                                      ,(symbolicate "FAST-CONDITIONAL" suffix))
                          (:translate logtest)
+                         (:conditional :ne)
                          (:generator ,cost
                           (emit-optimized-test-inst x
                                                     ,(if (eq suffix '-c/fixnum)
                                                          '(fixnumize y)
-                                                         'y))
-                          (inst jmp (if not-p :e :ne) target)))))))
+                                                         'y))))))))
   (define-logtest-vops))
 
 (defknown %logbitp (integer unsigned-byte) boolean
@@ -1082,42 +1088,42 @@
 ;;; too much work to do the non-constant case (maybe?)
 (define-vop (fast-logbitp-c/fixnum fast-conditional-c/fixnum)
   (:translate %logbitp)
+  (:conditional :c)
   (:arg-types tagged-num (:constant (integer 0 29)))
   (:generator 4
-    (inst bt x (+ y n-fixnum-tag-bits))
-    (inst jmp (if not-p :nc :c) target)))
+    (inst bt x (+ y n-fixnum-tag-bits))))
 
 (define-vop (fast-logbitp/signed fast-conditional/signed)
   (:args (x :scs (signed-reg signed-stack))
          (y :scs (signed-reg)))
   (:translate %logbitp)
+  (:conditional :c)
   (:generator 6
-    (inst bt x y)
-    (inst jmp (if not-p :nc :c) target)))
+    (inst bt x y)))
 
 (define-vop (fast-logbitp-c/signed fast-conditional-c/signed)
   (:translate %logbitp)
+  (:conditional :c)
   (:arg-types signed-num (:constant (integer 0 31)))
   (:generator 5
-    (inst bt x y)
-    (inst jmp (if not-p :nc :c) target)))
+    (inst bt x y)))
 
 (define-vop (fast-logbitp/unsigned fast-conditional/unsigned)
   (:args (x :scs (unsigned-reg unsigned-stack))
          (y :scs (unsigned-reg)))
   (:translate %logbitp)
+  (:conditional :c)
   (:generator 6
-    (inst bt x y)
-    (inst jmp (if not-p :nc :c) target)))
+    (inst bt x y)))
 
 (define-vop (fast-logbitp-c/unsigned fast-conditional-c/unsigned)
   (:translate %logbitp)
+  (:conditional :c)
   (:arg-types unsigned-num (:constant (integer 0 31)))
   (:generator 5
-    (inst bt x y)
-    (inst jmp (if not-p :nc :c) target)))
+    (inst bt x y)))
 
-(macrolet ((define-conditional-vop (tran cond unsigned not-cond not-unsigned)
+(macrolet ((define-conditional-vop (tran cond unsigned)
              `(progn
                 ,@(mapcar
                    (lambda (suffix cost signed)
@@ -1129,31 +1135,25 @@
                                      (format nil "~:@(FAST-CONDITIONAL~A~)"
                                              suffix)))
                         (:translate ,tran)
+                        (:conditional ,(if signed
+                                           cond
+                                           unsigned))
                         (:generator ,cost
                                     (inst cmp x
                                           ,(if (eq suffix '-c/fixnum)
                                                '(fixnumize y)
-                                               'y))
-                                    (inst jmp (if not-p
-                                                  ,(if signed
-                                                       not-cond
-                                                       not-unsigned)
-                                                  ,(if signed
-                                                       cond
-                                                       unsigned))
-                                          target))))
+                                               'y)))))
                    '(/fixnum -c/fixnum /signed -c/signed /unsigned -c/unsigned)
                    '(4 3 6 5 6 5)
                    '(t t t t nil nil)))))
 
-  (define-conditional-vop < :l :b :ge :ae)
-  (define-conditional-vop > :g :a :le :be))
+  (define-conditional-vop < :l :b)
+  (define-conditional-vop > :g :a))
 
 (define-vop (fast-if-eql/signed fast-conditional/signed)
   (:translate eql)
   (:generator 6
-    (inst cmp x y)
-    (inst jmp (if not-p :ne :e) target)))
+    (inst cmp x y)))
 
 (define-vop (fast-if-eql-c/signed fast-conditional-c/signed)
   (:translate eql)
@@ -1161,14 +1161,12 @@
     (cond ((and (sc-is x signed-reg) (zerop y))
            (inst test x x))  ; smaller instruction
           (t
-           (inst cmp x y)))
-    (inst jmp (if not-p :ne :e) target)))
+           (inst cmp x y)))))
 
 (define-vop (fast-if-eql/unsigned fast-conditional/unsigned)
   (:translate eql)
   (:generator 6
-    (inst cmp x y)
-    (inst jmp (if not-p :ne :e) target)))
+    (inst cmp x y)))
 
 (define-vop (fast-if-eql-c/unsigned fast-conditional-c/unsigned)
   (:translate eql)
@@ -1176,8 +1174,7 @@
     (cond ((and (sc-is x unsigned-reg) (zerop y))
            (inst test x x))  ; smaller instruction
           (t
-           (inst cmp x y)))
-    (inst jmp (if not-p :ne :e) target)))
+           (inst cmp x y)))))
 
 ;;; EQL/FIXNUM is funny because the first arg can be of any type, not just a
 ;;; known fixnum.
@@ -1197,8 +1194,7 @@
   (:note "inline fixnum comparison")
   (:translate eql)
   (:generator 4
-    (inst cmp x y)
-    (inst jmp (if not-p :ne :e) target)))
+    (inst cmp x y)))
 (define-vop (generic-eql/fixnum fast-eql/fixnum)
   (:args (x :scs (any-reg descriptor-reg)
             :load-if (not (and (sc-is x control-stack)
@@ -1210,14 +1206,13 @@
 (define-vop (fast-eql-c/fixnum fast-conditional/fixnum)
   (:args (x :scs (any-reg control-stack)))
   (:arg-types tagged-num (:constant (signed-byte 30)))
-  (:info target not-p y)
+  (:info y)
   (:translate eql)
   (:generator 2
     (cond ((and (sc-is x any-reg) (zerop y))
            (inst test x x))  ; smaller instruction
           (t
-           (inst cmp x (fixnumize y))))
-    (inst jmp (if not-p :ne :e) target)))
+           (inst cmp x (fixnumize y))))))
 (define-vop (generic-eql-c/fixnum fast-eql-c/fixnum)
   (:args (x :scs (any-reg descriptor-reg control-stack)))
   (:arg-types * (:constant (signed-byte 30)))
@@ -1225,21 +1220,6 @@
 
 ;;;; 32-bit logical operations
 
-(define-vop (merge-bits)
-  (:translate merge-bits)
-  (:args (shift :scs (signed-reg unsigned-reg) :target ecx)
-         (prev :scs (unsigned-reg) :target result)
-         (next :scs (unsigned-reg)))
-  (:arg-types tagged-num unsigned-num unsigned-num)
-  (:temporary (:sc signed-reg :offset ecx-offset :from (:argument 0)) ecx)
-  (:results (result :scs (unsigned-reg) :from (:argument 1)))
-  (:result-types unsigned-num)
-  (:policy :fast-safe)
-  (:generator 4
-    (move ecx shift)
-    (move result prev)
-    (inst shrd result next :cl)))
-
 ;;; Only the lower 5 bits of the shift amount are significant.
 (define-vop (shift-towards-someplace)
   (:policy :fast-safe)
@@ -1318,18 +1298,19 @@
                    (vop32f (intern (format nil "FAST-~S-MOD32/FIXNUM=>FIXNUM" name)))
                    (vop32cu (intern (format nil "FAST-~S-MOD32-C/WORD=>UNSIGNED" name)))
                    (vop32cf (intern (format nil "FAST-~S-MOD32-C/FIXNUM=>FIXNUM" name)))
-                   (sfun30 (intern (format nil "~S-SMOD30" name)))
-                   (svop30f (intern (format nil "FAST-~S-SMOD30/FIXNUM=>FIXNUM" name)))
-                   (svop30cf (intern (format nil "FAST-~S-SMOD30-C/FIXNUM=>FIXNUM" name))))
+                   (funfx (intern (format nil "~S-MODFX" name)))
+                   (vopfxf (intern (format nil "FAST-~S-MODFX/FIXNUM=>FIXNUM" name)))
+                   (vopfxcf (intern (format nil "FAST-~S-MODFX-C/FIXNUM=>FIXNUM" name))))
                `(progn
                   (define-modular-fun ,fun32 (x y) ,name :untagged nil 32)
-                  (define-modular-fun ,sfun30 (x y) ,name :tagged t 30)
+                  (define-modular-fun ,funfx (x y) ,name :tagged t
+                                      #.(- n-word-bits n-fixnum-tag-bits))
                   (define-mod-binop (,vop32u ,vopu) ,fun32)
                   (define-vop (,vop32f ,vopf) (:translate ,fun32))
-                  (define-vop (,svop30f ,vopf) (:translate ,sfun30))
+                  (define-vop (,vopfxf ,vopf) (:translate ,funfx))
                   ,@(when -c-p
                       `((define-mod-binop-c (,vop32cu ,vopcu) ,fun32)
-                        (define-vop (,svop30cf ,vopcf) (:translate ,sfun30))))))))
+                        (define-vop (,vopfxcf ,vopcf) (:translate ,funfx))))))))
   (def + t)
   (def - t)
   ;; (no -C variant as x86 MUL instruction doesn't take an immediate)
@@ -1348,25 +1329,26 @@
     (sb!c::give-up-ir1-transform))
   '(%primitive fast-ash-left-mod32/unsigned=>unsigned integer count))
 
-(define-vop (fast-ash-left-smod30-c/fixnum=>fixnum
+(define-vop (fast-ash-left-modfx-c/fixnum=>fixnum
              fast-ash-c/fixnum=>fixnum)
-  (:translate ash-left-smod30))
+  (:variant :modular)
+  (:translate ash-left-modfx))
 
-(define-vop (fast-ash-left-smod30/fixnum=>fixnum
+(define-vop (fast-ash-left-modfx/fixnum=>fixnum
              fast-ash-left/fixnum=>fixnum))
-(deftransform ash-left-smod30 ((integer count)
-                               ((signed-byte 30) (unsigned-byte 5)))
+(deftransform ash-left-modfx ((integer count)
+                              (fixnum (unsigned-byte 5)))
   (when (sb!c::constant-lvar-p count)
     (sb!c::give-up-ir1-transform))
-  '(%primitive fast-ash-left-smod30/fixnum=>fixnum integer count))
+  '(%primitive fast-ash-left-modfx/fixnum=>fixnum integer count))
 
 (in-package "SB!C")
 
 (defknown sb!vm::%lea-mod32 (integer integer (member 1 2 4 8) (signed-byte 32))
   (unsigned-byte 32)
   (foldable flushable movable))
-(defknown sb!vm::%lea-smod30 (integer integer (member 1 2 4 8) (signed-byte 32))
-  (signed-byte 30)
+(defknown sb!vm::%lea-modfx (integer integer (member 1 2 4 8) (signed-byte 32))
+  fixnum
   (foldable flushable movable))
 
 (define-modular-fun-optimizer %lea ((base index scale disp) :untagged nil :width width)
@@ -1377,19 +1359,20 @@
     (cut-to-width index :untagged width nil)
     'sb!vm::%lea-mod32))
 (define-modular-fun-optimizer %lea ((base index scale disp) :tagged t :width width)
-  (when (and (<= width 30)
+  (when (and (<= width (- sb!vm:n-word-bits sb!vm:n-fixnum-tag-bits))
              (constant-lvar-p scale)
              (constant-lvar-p disp))
     (cut-to-width base :tagged width t)
     (cut-to-width index :tagged width t)
-    'sb!vm::%lea-smod30))
+    'sb!vm::%lea-modfx))
 
 #+sb-xc-host
 (progn
   (defun sb!vm::%lea-mod32 (base index scale disp)
     (ldb (byte 32 0) (%lea base index scale disp)))
-  (defun sb!vm::%lea-smod30 (base index scale disp)
-    (mask-signed-field 30 (%lea base index scale disp))))
+  (defun sb!vm::%lea-modfx (base index scale disp)
+    (mask-signed-field (- sb!vm:n-word-bits sb!vm:n-fixnum-tag-bits)
+                       (%lea base index scale disp))))
 #-sb-xc-host
 (progn
   (defun sb!vm::%lea-mod32 (base index scale disp)
@@ -1398,21 +1381,22 @@
       ;; can't use modular version of %LEA, as we only have VOPs for
       ;; constant SCALE and DISP.
       (ldb (byte 32 0) (+ base (* index scale) disp))))
-  (defun sb!vm::%lea-smod30 (base index scale disp)
-    (let ((base (mask-signed-field 30 base))
-          (index (mask-signed-field 30 index)))
+  (defun sb!vm::%lea-modfx (base index scale disp)
+    (let* ((fixnum-width (- sb!vm:n-word-bits sb!vm:n-fixnum-tag-bits))
+           (base (mask-signed-field fixnum-width base))
+           (index (mask-signed-field fixnum-width index)))
       ;; can't use modular version of %LEA, as we only have VOPs for
       ;; constant SCALE and DISP.
-      (mask-signed-field 30 (+ base (* index scale) disp)))))
+      (mask-signed-field fixnum-width (+ base (* index scale) disp)))))
 
 (in-package "SB!VM")
 
 (define-vop (%lea-mod32/unsigned=>unsigned
              %lea/unsigned=>unsigned)
   (:translate %lea-mod32))
-(define-vop (%lea-smod30/fixnum=>fixnum
+(define-vop (%lea-modfx/fixnum=>fixnum
              %lea/fixnum=>fixnum)
-  (:translate %lea-smod30))
+  (:translate %lea-modfx))
 
 ;;; logical operations
 (define-modular-fun lognot-mod32 (x) lognot :untagged nil 32)
@@ -1478,11 +1462,9 @@
   (:policy :fast-safe)
   (:args (digit :scs (unsigned-reg)))
   (:arg-types unsigned-num)
-  (:conditional)
-  (:info target not-p)
+  (:conditional :ns)
   (:generator 3
-    (inst or digit digit)
-    (inst jmp (if not-p :s :ns) target)))
+    (inst or digit digit)))
 
 
 ;;; For add and sub with carry the sc of carry argument is any-reg so
@@ -1595,6 +1577,42 @@
     (move hi edx)
     (move lo eax)))
 
+#!+multiply-high-vops
+(define-vop (mulhi)
+  (:translate sb!kernel:%multiply-high)
+  (:policy :fast-safe)
+  (:args (x :scs (unsigned-reg) :target eax)
+         (y :scs (unsigned-reg unsigned-stack)))
+  (:arg-types unsigned-num unsigned-num)
+  (:temporary (:sc unsigned-reg :offset eax-offset :from (:argument 0))
+              eax)
+  (:temporary (:sc unsigned-reg :offset edx-offset :from (:argument 1)
+                   :to (:result 0) :target hi) edx)
+  (:results (hi :scs (unsigned-reg)))
+  (:result-types unsigned-num)
+  (:generator 20
+    (move eax x)
+    (inst mul eax y)
+    (move hi edx)))
+
+#!+multiply-high-vops
+(define-vop (mulhi/fx)
+  (:translate sb!kernel:%multiply-high)
+  (:policy :fast-safe)
+  (:args (x :scs (any-reg) :target eax)
+         (y :scs (unsigned-reg unsigned-stack)))
+  (:arg-types positive-fixnum unsigned-num)
+  (:temporary (:sc any-reg :offset eax-offset :from (:argument 0)) eax)
+  (:temporary (:sc any-reg :offset edx-offset :from (:argument 1)
+                   :to (:result 0) :target hi) edx)
+  (:results (hi :scs (any-reg)))
+  (:result-types positive-fixnum)
+  (:generator 15
+    (move eax x)
+    (inst mul eax y)
+    (move hi edx)
+    (inst and hi (lognot fixnum-tag-mask))))
+
 (define-vop (bignum-lognot lognot-mod32/word=>unsigned)
   (:translate sb!bignum:%lognot))
 
@@ -1610,10 +1628,10 @@
   (:result-types unsigned-num)
   (:generator 1
     (move digit fixnum)
-    (inst sar digit 2)))
+    (inst sar digit n-fixnum-tag-bits)))
 
 (define-vop (bignum-floor)
-  (:translate sb!bignum:%floor)
+  (:translate sb!bignum:%bigfloor)
   (:policy :fast-safe)
   (:args (div-high :scs (unsigned-reg) :target edx)
          (div-low :scs (unsigned-reg) :target eax)
@@ -1646,7 +1664,7 @@
   (:generator 1
     (move res digit)
     (when (sc-is res any-reg control-stack)
-      (inst shl res 2))))
+      (inst shl res n-fixnum-tag-bits))))
 
 (define-vop (digit-ashr)
   (:translate sb!bignum:%ashr)
@@ -1871,17 +1889,17 @@
     (*-transformer :unsigned 32 y)))
 
 (deftransform * ((x y)
-                 ((signed-byte 30) (constant-arg (unsigned-byte 32)))
-                 (signed-byte 30))
+                 (fixnum (constant-arg (unsigned-byte 32)))
+                 fixnum)
   "recode as leas, shifts and adds"
   (let ((y (lvar-value y)))
-    (*-transformer :signed 30 y)))
-(deftransform sb!vm::*-smod30
-    ((x y) ((signed-byte 30) (constant-arg (unsigned-byte 32)))
-     (signed-byte 30))
+    (*-transformer :signed (- sb!vm:n-word-bits sb!vm:n-fixnum-tag-bits) y)))
+(deftransform sb!vm::*-modfx
+    ((x y) (fixnum (constant-arg (unsigned-byte 32)))
+     fixnum)
   "recode as leas, shifts and adds"
   (let ((y (lvar-value y)))
-    (*-transformer :signed 30 y)))
+    (*-transformer :signed (- sb!vm:n-word-bits sb!vm:n-fixnum-tag-bits) y)))
 
 ;;; FIXME: we should also be able to write an optimizer or two to
 ;;; convert (+ (* x 2) 17), (- (* x 9) 5) to a %LEA.