(in-package "SB!VM")
\f
-;;;; from signed/unsigned
+;;;; Signed and unsigned bignums from word-sized integers. Argument
+;;;; and return in the same register. No VOPs, as these are only used
+;;;; as out-of-line versions: MOVE-FROM-[UN]SIGNED VOPs handle the
+;;;; fixnum cases inline.
-;;; KLUDGE: Why don't we want vops for this one and the next
-;;; one? -- WHN 19990916
-#+sb-assembling ; We don't want a vop for this one.
-(define-assembly-routine
- (move-from-signed)
- ((:temp eax unsigned-reg eax-offset)
- (:temp ebx unsigned-reg ebx-offset))
- (inst mov ebx eax)
- (inst shl ebx 1)
- (inst jmp :o bignum)
- (inst shl ebx 1)
- (inst jmp :o bignum)
- (inst ret)
- BIGNUM
+;;; #+SB-ASSEMBLING as we don't need VOPS, just the asm routines:
+;;; these are out-of-line versions called by VOPs.
- (with-fixed-allocation (ebx bignum-widetag (+ bignum-digits-offset 1))
- (storew eax ebx bignum-digits-offset other-pointer-lowtag))
+#+sb-assembling
+(macrolet ((def (reg)
+ (let ((tn (symbolicate reg "-TN")))
+ `(define-assembly-routine (,(symbolicate "ALLOC-SIGNED-BIGNUM-IN-" reg)) ()
+ (inst push ,tn)
+ (with-fixed-allocation (,tn bignum-widetag (+ bignum-digits-offset 1))
+ (popw ,tn bignum-digits-offset other-pointer-lowtag))
+ (inst ret)))))
+ (def eax)
+ (def ebx)
+ (def ecx)
+ (def edx)
+ (def edi)
+ (def esi))
- (inst ret))
+#+sb-assembling
+(macrolet ((def (reg)
+ (let ((tn (symbolicate reg "-TN")))
+ `(define-assembly-routine (,(symbolicate "ALLOC-UNSIGNED-BIGNUM-IN-" reg)) ()
+ (inst push ,tn)
+ ;; Sign flag is set by the caller! Note: The inline
+ ;; version always allocates space for two words, but
+ ;; here we minimize garbage.
+ (inst jmp :ns one-word-bignum)
+ ;; Two word bignum
+ (with-fixed-allocation (,tn bignum-widetag (+ bignum-digits-offset 2))
+ (popw ,tn bignum-digits-offset other-pointer-lowtag))
+ (inst ret)
+ ONE-WORD-BIGNUM
+ (with-fixed-allocation (,tn bignum-widetag (+ bignum-digits-offset 1))
+ (popw ,tn bignum-digits-offset other-pointer-lowtag))
+ (inst ret)))))
+ (def eax)
+ (def ebx)
+ (def ecx)
+ (def edx)
+ (def edi)
+ (def esi))
-#+sb-assembling ; We don't want a vop for this one either.
-(define-assembly-routine
- (move-from-unsigned)
- ((:temp eax unsigned-reg eax-offset)
- (:temp ebx unsigned-reg ebx-offset))
+;;; FIXME: This is dead, right? Can it go?
+#+sb-assembling
+(defun frob-allocation-assembly-routine (obj lowtag arg-tn)
+ `(define-assembly-routine (,(intern (format nil "ALLOCATE-~A-TO-~A" obj arg-tn)))
+ ((:temp ,arg-tn descriptor-reg ,(intern (format nil "~A-OFFSET" arg-tn))))
+ (pseudo-atomic
+ (allocation ,arg-tn (pad-data-block ,(intern (format nil "~A-SIZE" obj))))
+ (inst lea ,arg-tn (make-ea :byte :base ,arg-tn :disp ,lowtag)))
+ (inst ret)))
- (inst test eax #xe0000000)
- (inst jmp :nz bignum)
- ;; Fixnum
- (inst mov ebx eax)
- (inst shl ebx 2)
- (inst ret)
-
- BIGNUM
- ;;; Note: On the mips port space for a two word bignum is always
- ;;; allocated and the header size is set to either one or two words
- ;;; as appropriate. On the mips port this is faster, and smaller
- ;;; inline, but produces more garbage. The inline x86 version uses
- ;;; the same approach, but here we save garbage and allocate the
- ;;; smallest possible bignum.
- (inst jmp :ns one-word-bignum)
- (inst mov ebx eax)
-
- ;; Two word bignum
- (with-fixed-allocation (ebx bignum-widetag (+ bignum-digits-offset 2))
- (storew eax ebx bignum-digits-offset other-pointer-lowtag))
- (inst ret)
-
- ONE-WORD-BIGNUM
- (with-fixed-allocation (ebx bignum-widetag (+ bignum-digits-offset 1))
- (storew eax ebx bignum-digits-offset other-pointer-lowtag))
- (inst ret))
+#+sb-assembling
+(macrolet ((frob-cons-routines ()
+ (let ((routines nil))
+ (dolist (tn-offset *dword-regs*
+ `(progn ,@routines))
+ (push (frob-allocation-assembly-routine 'cons
+ list-pointer-lowtag
+ (intern (aref *dword-register-names* tn-offset)))
+ routines)))))
+ (frob-cons-routines))
projects / sbcl.git / blobdiff