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;;;; stuff to handle simple cases for generic arithmetic
;;;; This software is part of the SBCL system. See the README file for
;;;; more information.
;;;;
;;;; This software is derived from the CMU CL system, which was
;;;; written at Carnegie Mellon University and released into the
;;;; public domain. The software is in the public domain and is
;;;; provided with absolutely no warranty. See the COPYING and CREDITS
;;;; files for more information.
(in-package "SB!VM")
(define-assembly-routine (generic-+
(:cost 10)
(:return-style :full-call)
(:translate +)
(:policy :safe)
(:save-p t))
((:arg x (descriptor-reg any-reg) a0-offset)
(:arg y (descriptor-reg any-reg) a1-offset)
(:res res (descriptor-reg any-reg) a0-offset)
(:temp temp non-descriptor-reg nl0-offset)
(:temp temp2 non-descriptor-reg nl1-offset)
(:temp temp3 non-descriptor-reg nl2-offset)
(:temp lip interior-reg lip-offset)
(:temp lra descriptor-reg lra-offset)
(:temp nargs any-reg nargs-offset)
(:temp ocfp any-reg ocfp-offset))
(inst and x 3 temp)
(inst bne temp DO-STATIC-FUN)
(inst and y 3 temp)
(inst bne temp DO-STATIC-FUN)
(inst addq x y res)
; Check whether we need a bignum.
(inst sra res 31 temp)
(inst beq temp DONE)
(inst not temp temp)
(inst beq temp DONE)
(inst sra res 2 temp3)
; from move-from-signed
(inst li 2 temp2)
(inst sra temp3 31 temp)
(inst cmoveq temp 1 temp2)
(inst not temp temp)
(inst cmoveq temp 1 temp2)
(inst sll temp2 n-widetag-bits temp2)
(inst bis temp2 bignum-widetag temp2)
(pseudo-atomic (:extra (pad-data-block (+ bignum-digits-offset 3)))
(inst bis alloc-tn other-pointer-lowtag res)
(storew temp2 res 0 other-pointer-lowtag)
(storew temp3 res bignum-digits-offset other-pointer-lowtag)
(inst srl temp3 32 temp)
(storew temp res (1+ bignum-digits-offset) other-pointer-lowtag))
DONE
(lisp-return lra lip :offset 2)
DO-STATIC-FUN
(inst ldl lip (static-fun-offset 'two-arg-+) null-tn)
(inst li (fixnumize 2) nargs)
(inst move cfp-tn ocfp)
(inst move csp-tn cfp-tn)
(inst jmp zero-tn lip))
(define-assembly-routine (generic--
(:cost 10)
(:return-style :full-call)
(:translate -)
(:policy :safe)
(:save-p t))
((:arg x (descriptor-reg any-reg) a0-offset)
(:arg y (descriptor-reg any-reg) a1-offset)
(:res res (descriptor-reg any-reg) a0-offset)
(:temp temp non-descriptor-reg nl0-offset)
(:temp temp2 non-descriptor-reg nl1-offset)
(:temp temp3 non-descriptor-reg nl2-offset)
(:temp lip interior-reg lip-offset)
(:temp lra descriptor-reg lra-offset)
(:temp nargs any-reg nargs-offset)
(:temp ocfp any-reg ocfp-offset))
(inst and x 3 temp)
(inst bne temp DO-STATIC-FUN)
(inst and y 3 temp)
(inst bne temp DO-STATIC-FUN)
(inst subq x y res)
; Check whether we need a bignum.
(inst sra res 31 temp)
(inst beq temp DONE)
(inst not temp temp)
(inst beq temp DONE)
(inst sra res 2 temp3)
; from move-from-signed
(inst li 2 temp2)
(inst sra temp3 31 temp)
(inst cmoveq temp 1 temp2)
(inst not temp temp)
(inst cmoveq temp 1 temp2)
(inst sll temp2 n-widetag-bits temp2)
(inst bis temp2 bignum-widetag temp2)
(pseudo-atomic (:extra (pad-data-block (+ bignum-digits-offset 3)))
(inst bis alloc-tn other-pointer-lowtag res)
(storew temp2 res 0 other-pointer-lowtag)
(storew temp3 res bignum-digits-offset other-pointer-lowtag)
(inst srl temp3 32 temp)
(storew temp res (1+ bignum-digits-offset) other-pointer-lowtag))
DONE
(lisp-return lra lip :offset 2)
DO-STATIC-FUN
(inst ldl lip (static-fun-offset 'two-arg--) null-tn)
(inst li (fixnumize 2) nargs)
(inst move cfp-tn ocfp)
(inst move csp-tn cfp-tn)
(inst jmp zero-tn lip))
(define-assembly-routine (generic-*
(:cost 25)
(:return-style :full-call)
(:translate *)
(:policy :safe)
(:save-p t))
((:arg x (descriptor-reg any-reg) a0-offset)
(:arg y (descriptor-reg any-reg) a1-offset)
(:res res (descriptor-reg any-reg) a0-offset)
(:temp temp non-descriptor-reg nl0-offset)
(:temp lo non-descriptor-reg nl1-offset)
(:temp hi non-descriptor-reg nl2-offset)
(:temp temp2 non-descriptor-reg nl3-offset)
(:temp lip interior-reg lip-offset)
(:temp lra descriptor-reg lra-offset)
(:temp nargs any-reg nargs-offset)
(:temp ocfp any-reg ocfp-offset))
;; If either arg is not a fixnum, call the static function.
(inst and x 3 temp)
(inst bne temp DO-STATIC-FUN)
(inst and y 3 temp)
(inst bne temp DO-STATIC-FUN)
;; Remove the tag from one arg so that the result will have the
;; correct fixnum tag.
(inst sra x 2 temp)
(inst mulq temp y lo)
(inst sra lo 32 hi)
(inst sll lo 32 res)
(inst sra res 32 res)
;; Check to see if the result will fit in a fixnum. (I.e. the high
;; word is just 32 copies of the sign bit of the low word).
(inst sra res 31 temp)
(inst xor hi temp temp)
(inst beq temp DONE)
;; Shift the double word hi:res down two bits into hi:low to get rid
;; of the fixnum tag.
(inst sra lo 2 lo)
(inst sra lo 32 hi)
;; Do we need one word or two? Assume two.
(inst li (logior (ash 2 n-widetag-bits) bignum-widetag) temp2)
(inst sra lo 31 temp)
(inst xor temp hi temp)
(inst bne temp two-words)
;; Only need one word, fix the header.
(inst li (logior (ash 1 n-widetag-bits) bignum-widetag) temp2)
;; Allocate one word.
(pseudo-atomic (:extra (pad-data-block (1+ bignum-digits-offset)))
(inst bis alloc-tn other-pointer-lowtag res)
(storew temp2 res 0 other-pointer-lowtag))
;; Store one word
(storew lo res bignum-digits-offset other-pointer-lowtag)
;; Out of here
(lisp-return lra lip :offset 2)
TWO-WORDS
;; Allocate two words.
(pseudo-atomic (:extra (pad-data-block (+ 2 bignum-digits-offset)))
(inst bis alloc-tn other-pointer-lowtag res)
(storew temp2 res 0 other-pointer-lowtag))
;; Store two words.
(storew lo res bignum-digits-offset other-pointer-lowtag)
(storew hi res (1+ bignum-digits-offset) other-pointer-lowtag)
;; out of here
(lisp-return lra lip :offset 2)
DO-STATIC-FUN
(inst ldl lip (static-fun-offset 'two-arg-*) null-tn)
(inst li (fixnumize 2) nargs)
(inst move cfp-tn ocfp)
(inst move csp-tn cfp-tn)
(inst jmp zero-tn lip)
DONE)
;;;; division
(define-assembly-routine (signed-truncate
(:note "(signed-byte 64) truncate")
(:cost 60)
(:policy :fast-safe)
(:translate truncate)
(:arg-types signed-num signed-num)
(:result-types signed-num signed-num))
((:arg dividend signed-reg nl0-offset)
(:arg divisor signed-reg nl1-offset)
(:res quo signed-reg nl2-offset)
(:res rem signed-reg nl3-offset)
(:temp quo-sign signed-reg nl5-offset)
(:temp rem-sign signed-reg nargs-offset)
(:temp temp1 non-descriptor-reg nl4-offset))
(let ((error (generate-error-code nil division-by-zero-error
dividend divisor)))
(inst beq divisor error))
(inst xor dividend divisor quo-sign)
(inst move dividend rem-sign)
(let ((label (gen-label)))
(inst bge dividend label)
(inst subq zero-tn dividend dividend)
(emit-label label))
(let ((label (gen-label)))
(inst bge divisor label)
(inst subq zero-tn divisor divisor)
(emit-label label))
(inst move zero-tn rem)
(inst move zero-tn quo)
(dotimes (i 64)
(inst srl dividend 63 temp1)
(inst sll rem 1 rem)
(inst bis temp1 rem rem)
(inst cmple divisor rem temp1)
(inst sll quo 1 quo)
(inst bis temp1 quo quo)
(inst sll dividend 1 dividend)
(inst subq temp1 1 temp1)
(inst zap divisor temp1 temp1)
(inst subq rem temp1 rem))
(let ((label (gen-label)))
;; If the quo-sign is negative, we need to negate quo.
(inst bge quo-sign label)
(inst subq zero-tn quo quo)
(emit-label label))
(let ((label (gen-label)))
;; If the rem-sign is negative, we need to negate rem.
(inst bge rem-sign label)
(inst subq zero-tn rem rem)
(emit-label label)))
;;;; comparison routines
(macrolet
((define-cond-assem-rtn (name translate static-fn cmp not-p)
`(define-assembly-routine (,name
(:cost 10)
(:return-style :full-call)
(:policy :safe)
(:translate ,translate)
(:save-p t))
((:arg x (descriptor-reg any-reg) a0-offset)
(:arg y (descriptor-reg any-reg) a1-offset)
(:res res descriptor-reg a0-offset)
(:temp temp non-descriptor-reg nl0-offset)
(:temp lip interior-reg lip-offset)
(:temp nargs any-reg nargs-offset)
(:temp ocfp any-reg ocfp-offset))
(inst and x 3 temp)
(inst bne temp DO-STATIC-FN)
(inst and y 3 temp)
(inst beq temp DO-COMPARE)
DO-STATIC-FN
(inst ldl lip (static-fun-offset ',static-fn) null-tn)
(inst li (fixnumize 2) nargs)
(inst move cfp-tn ocfp)
(inst move csp-tn cfp-tn)
(inst jmp zero-tn lip)
DO-COMPARE
,cmp
(inst move null-tn res)
(inst ,(if not-p 'bne 'beq) temp done)
(load-symbol res t)
DONE)))
(define-cond-assem-rtn generic-< < two-arg-< (inst cmplt x y temp) nil)
(define-cond-assem-rtn generic-> > two-arg-> (inst cmplt y x temp) nil))
(define-assembly-routine (generic-eql
(:cost 10)
(:return-style :full-call)
(:policy :safe)
(:translate eql)
(:save-p t))
((:arg x (descriptor-reg any-reg) a0-offset)
(:arg y (descriptor-reg any-reg) a1-offset)
(:res res descriptor-reg a0-offset)
(:temp temp non-descriptor-reg nl0-offset)
(:temp lip interior-reg lip-offset)
(:temp lra descriptor-reg lra-offset)
(:temp nargs any-reg nargs-offset)
(:temp ocfp any-reg ocfp-offset))
(inst cmpeq x y temp)
(inst bne temp RETURN-T)
(inst and x 3 temp)
(inst beq temp RETURN-NIL)
(inst and y 3 temp)
(inst bne temp DO-STATIC-FN)
RETURN-NIL
(inst move null-tn res)
(lisp-return lra lip :offset 2)
DO-STATIC-FN
(inst ldl lip (static-fun-offset 'eql) null-tn)
(inst li (fixnumize 2) nargs)
(inst move cfp-tn ocfp)
(inst move csp-tn cfp-tn)
(inst jmp zero-tn lip)
RETURN-T
(load-symbol res t))
(define-assembly-routine (generic-=
(:cost 10)
(:return-style :full-call)
(:policy :safe)
(:translate =)
(:save-p t))
((:arg x (descriptor-reg any-reg) a0-offset)
(:arg y (descriptor-reg any-reg) a1-offset)
(:res res descriptor-reg a0-offset)
(:temp temp non-descriptor-reg nl0-offset)
(:temp lip interior-reg lip-offset)
(:temp lra descriptor-reg lra-offset)
(:temp nargs any-reg nargs-offset)
(:temp ocfp any-reg ocfp-offset))
(inst and x 3 temp)
(inst bne temp DO-STATIC-FN)
(inst and y 3 temp)
(inst bne temp DO-STATIC-FN)
(inst cmpeq x y temp)
(inst bne temp RETURN-T)
(inst move null-tn res)
(lisp-return lra lip :offset 2)
DO-STATIC-FN
(inst ldl lip (static-fun-offset 'two-arg-=) null-tn)
(inst li (fixnumize 2) nargs)
(inst move cfp-tn ocfp)
(inst move csp-tn cfp-tn)
(inst jmp zero-tn lip)
RETURN-T
(load-symbol res t))
(define-assembly-routine (generic-/=
(:cost 10)
(:return-style :full-call)
(:policy :safe)
(:translate /=)
(:save-p t))
((:arg x (descriptor-reg any-reg) a0-offset)
(:arg y (descriptor-reg any-reg) a1-offset)
(:res res descriptor-reg a0-offset)
(:temp temp non-descriptor-reg nl0-offset)
(:temp lip interior-reg lip-offset)
(:temp lra descriptor-reg lra-offset)
(:temp nargs any-reg nargs-offset)
(:temp ocfp any-reg ocfp-offset))
(inst and x 3 temp)
(inst bne temp DO-STATIC-FN)
(inst and y 3 temp)
(inst bne temp DO-STATIC-FN)
(inst cmpeq x y temp)
(inst bne temp RETURN-NIL)
(load-symbol res t)
(lisp-return lra lip :offset 2)
DO-STATIC-FN
(inst ldl lip (static-fun-offset 'two-arg-=) null-tn)
(inst li (fixnumize 2) nargs)
(inst move cfp-tn ocfp)
(inst move csp-tn cfp-tn)
(inst jmp zero-tn lip)
RETURN-NIL
(inst move null-tn res))