X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;ds=inline;f=src%2Fcompiler%2Fgeneric%2Fearly-objdef.lisp;h=46bd930ae3bd42af0ef14cbe05f6c527b060ac90;hb=862c0325616a991a5bd7b50d79f7176d2115493b;hp=2b1cff009ba764e3402ecbce311f9a6e1d171799;hpb=52ac289268a5b6ad76c6d50c919e5d23f1faa52e;p=sbcl.git diff --git a/src/compiler/generic/early-objdef.lisp b/src/compiler/generic/early-objdef.lisp index 2b1cff0..46bd930 100644 --- a/src/compiler/generic/early-objdef.lisp +++ b/src/compiler/generic/early-objdef.lisp @@ -20,12 +20,12 @@ ;;; 'def.*even-fixnum-lowtag' can find them. ;;; Tags for the main low-level types are stored in the low n (usually three) -;;; bits to identify the type of a machine word. Certain constraints +;;; bits to identify the type of a machine word. Certain constraints ;;; apply: ;;; * EVEN-FIXNUM-LOWTAG and ODD-FIXNUM-LOWTAG must be 0 and 4: code ;;; which shifts left two places to convert raw integers to tagged ;;; fixnums is ubiquitous. -;;; * LIST-POINTER-LOWTAG + N-WORD-BYTES = OTHER-POINTER-LOWTAG: NIL +;;; * LIST-POINTER-LOWTAG + N-WORD-BYTES = OTHER-POINTER-LOWTAG: NIL ;;; is both a cons and a symbol (at the same address) and depends on this. ;;; See the definition of SYMBOL in objdef.lisp ;;; * OTHER-POINTER-LOWTAG > 4: Some code in the SPARC backend, @@ -33,8 +33,10 @@ ;;; PSEUDO-ATOMIC is on, doesn't strip the low bits of reg_ALLOC ;;; before ORing in OTHER-POINTER-LOWTAG within a PSEUDO-ATOMIC ;;; section. -;;; * OTHER-IMMEDIATE-0-LOWTAG are spaced 4 apart: various code wants to +;;; * OTHER-IMMEDIATE-0-LOWTAG are spaced 4 apart: various code wants to ;;; iterate through these +;;; * Allocation code on Alpha wants lowtags for heap-allocated +;;; objects to be odd. ;;; (These are just the ones we know about as of sbcl-0.7.1.22. There ;;; might easily be more, since these values have stayed highly ;;; constrained for more than a decade, an inviting target for @@ -43,7 +45,7 @@ ;; The EVAL-WHEN is necessary (at least for Lispworks), because the ;; second DEFENUM uses the value of OTHER-IMMEDIATE-0-LOWTAG, which is ;; defined in the first DEFENUM. -- AL 20000216 - #!+x86-64 + #!+#.(cl:if (cl:= 64 sb!vm:n-word-bits) '(and) '(or)) (defenum (:suffix -lowtag) even-fixnum instance-pointer @@ -57,7 +59,7 @@ pad3 pad4 pad5 other-immediate-3 other-pointer) - #!-x86-64 + #!+#.(cl:if (cl:= 32 sb!vm:n-word-bits) '(and) '(or)) (defenum (:suffix -lowtag) even-fixnum instance-pointer @@ -108,10 +110,17 @@ ;;; ANDcc tag, 0xA6, tag ;;; JNE tag, label ;;; -;;; rather than two separate tests and jumps +;;; rather than two separate tests and jumps (defenum (:suffix -widetag - :start (+ (ash 1 n-lowtag-bits) other-immediate-0-lowtag) - :step 4) + ;; The first widetag must be greater than SB!VM:LOWTAG-LIMIT + ;; otherwise code in generic/early-type-vops will suffer + ;; a long, horrible death. --njf, 2004-08-09 + :start (+ (ash 1 n-lowtag-bits) other-immediate-0-lowtag) + :step 4) + ;; NOTE: the binary numbers off to the side are only valid for 32-bit + ;; ports; add #b1000 if you want to know the values for 64-bit ports. + ;; And note that the numbers get a little scrambled further down. + ;; --njf, 2004-08-09 bignum ; 00001010 ratio ; 00001110 single-float ; 00010010 @@ -129,14 +138,14 @@ return-pc-header ; 00110110 value-cell-header ; 00111010 symbol-header ; 00111110 - base-char ; 01000010 + character ; 01000010 sap ; 01000110 unbound-marker ; 01001010 weak-pointer ; 01001110 instance-header ; 01010010 fdefn ; 01010110 - unused00 ; 01011010 + no-tls-value-marker ; 01011010 unused01 ; 01011110 unused02 ; 01100010 unused03 ; 01100110 @@ -144,10 +153,14 @@ unused05 ; 01101110 unused06 ; 01110010 unused07 ; 01110110 + #!+#.(cl:if (cl:= 32 sb!vm:n-word-bits) '(and) '(or)) unused08 ; 01111010 + #!+#.(cl:if (cl:= 32 sb!vm:n-word-bits) '(and) '(or)) unused09 ; 01111110 - + + #!+#.(cl:if (cl:= 32 sb!vm:n-word-bits) '(and) '(or)) unused10 ; 10000010 + #!+#.(cl:if (cl:= 32 sb!vm:n-word-bits) '(and) '(or)) unused11 ; 10000110 simple-array-unsigned-byte-2 ; 10001010 @@ -158,15 +171,28 @@ simple-array-unsigned-byte-16 ; 10011110 simple-array-nil ; 10100010 simple-base-string ; 10100110 + #!+sb-unicode simple-character-string simple-bit-vector ; 10101010 simple-vector ; 10101110 + #!+#.(cl:if (cl:= 32 sb!vm:n-word-bits) '(and) '(or)) simple-array-unsigned-byte-29 ; 10110010 simple-array-unsigned-byte-31 ; 10110110 simple-array-unsigned-byte-32 ; 10111010 + #!+#.(cl:if (cl:= 64 sb!vm:n-word-bits) '(and) '(or)) + simple-array-unsigned-byte-60 + #!+#.(cl:if (cl:= 64 sb!vm:n-word-bits) '(and) '(or)) + simple-array-unsigned-byte-63 + #!+#.(cl:if (cl:= 64 sb!vm:n-word-bits) '(and) '(or)) + simple-array-unsigned-byte-64 simple-array-signed-byte-8 ; 10111110 simple-array-signed-byte-16 ; 11000010 + #!+#.(cl:if (cl:= 32 sb!vm:n-word-bits) '(and) '(or)) simple-array-signed-byte-30 ; 11000110 simple-array-signed-byte-32 ; 11001010 + #!+#.(cl:if (cl:= 64 sb!vm:n-word-bits) '(and) '(or)) + simple-array-signed-byte-61 + #!+#.(cl:if (cl:= 64 sb!vm:n-word-bits) '(and) '(or)) + simple-array-signed-byte-64 simple-array-single-float ; 11001110 simple-array-double-float ; 11010010 simple-array-complex-single-float ; 11010110 @@ -174,12 +200,18 @@ simple-array ; 11011110 complex-vector-nil ; 11100010 complex-base-string ; 11100110 + #!+sb-unicode complex-character-string complex-bit-vector ; 11101010 complex-vector ; 11101110 complex-array ; 11110010 + #!+#.(cl:if (cl:= 32 sb!vm:n-word-bits) '(and) '(or)) unused12 ; 11110110 + #!+(and #.(cl:if (cl:= 32 sb!vm:n-word-bits) '(and) '(or)) + (not sb-unicode)) unused13 ; 11111010 + #!+(and #.(cl:if (cl:= 32 sb!vm:n-word-bits) '(and) '(or)) + (not sb-unicode)) unused14 ; 11111110 )