;;; The ABI specifies that signed short/int's are returned as 32-bit
;;; values. Negative values need to be sign-extended to 64-bits (done
;;; in a :NATURALIZE-GEN alien-type-method).
-(defknown sign-extend (fixnum) fixnum (foldable flushable movable))
+(defknown sign-extend ((signed-byte 64)) (signed-byte 64)
+ (foldable flushable movable))
(define-vop (sign-extend)
(:translate sign-extend)
(:policy :fast-safe)
- (:args (val :scs (any-reg)))
- (:arg-types fixnum)
- (:results (res :scs (any-reg)))
- (:result-types fixnum)
+ (:args (val :scs (signed-reg)))
+ (:arg-types signed-byte-64)
+ (:results (res :scs (signed-reg)))
+ (:result-types signed-byte-64)
(:generator 1
(inst movsxd res
(make-random-tn :kind :normal
(:generator 2
(inst add rsp-tn (fixnumize number))))
+;;; Callbacks
+
+#-sb-xc-host
+(defun alien-callback-accessor-form (type sp offset)
+ `(deref (sap-alien (sap+ ,sp ,offset) (* ,type))))
+
+#-sb-xc-host
+(defun alien-callback-assembler-wrapper (index result-type argument-types)
+ (labels ((make-tn-maker (sc-name)
+ (lambda (offset)
+ (make-random-tn :kind :normal
+ :sc (sc-or-lose sc-name)
+ :offset offset)))
+ (out-of-registers-error ()
+ (error "Too many arguments in callback")))
+ (let* ((segment (make-segment))
+ (rax rax-tn)
+ (rcx rcx-tn)
+ (rdi rdi-tn)
+ (rsi rsi-tn)
+ (rdx rdx-tn)
+ (rbp rbp-tn)
+ (rsp rsp-tn)
+ (xmm0 float0-tn)
+ ([rsp] (make-ea :qword :base rsp :disp 0))
+ (words-processed 0)
+ (gprs (mapcar (make-tn-maker 'any-reg) *c-call-register-arg-offsets*))
+ (fprs (mapcar (make-tn-maker 'double-reg)
+ ;; Only 8 first XMM registers are used for
+ ;; passing arguments
+ (subseq *float-regs* 0 8))))
+ (assemble (segment)
+ ;; Make room on the stack for arguments.
+ (inst sub rsp (* n-word-bytes (length argument-types)))
+ ;; Copy arguments from registers to stack
+ (dolist (type argument-types)
+ (let ((integerp (not (alien-float-type-p type)))
+ (stack-tn (make-ea :qword :base rsp
+ :disp (* words-processed
+ n-word-bytes))))
+ (incf words-processed)
+ (cond (integerp
+ (let ((gpr (pop gprs)))
+ (if gpr
+ (inst mov stack-tn gpr)
+ (out-of-registers-error))))
+ ((or (alien-single-float-type-p type)
+ (alien-double-float-type-p type))
+ (let ((fpr (pop fprs)))
+ (if fpr
+ (inst movq stack-tn fpr)
+ (out-of-registers-error))))
+ (t
+ (bug "Unknown alien floating point type: ~S" type)))))
+
+ ;; arg0 to FUNCALL3 (function)
+ (inst mov rdi (get-lisp-obj-address #'enter-alien-callback))
+ ;; arg0 to ENTER-ALIEN-CALLBACK (trampoline index)
+ (inst mov rsi (fixnumize index))
+ ;; arg1 to ENTER-ALIEN-CALLBACK (pointer to argument vector)
+ (inst mov rdx rsp)
+ ;; add room on stack for return value
+ (inst sub rsp 8)
+ ;; arg2 to ENTER-ALIEN-CALLBACK (pointer to return value)
+ (inst mov rcx rsp)
+
+ ;; Make new frame
+ (inst push rbp)
+ (inst mov rbp rsp)
+
+ ;; Call
+ (inst mov rax (foreign-symbol-address "funcall3"))
+ (inst call rax)
+
+ ;; Back! Restore frame
+ (inst mov rsp rbp)
+ (inst pop rbp)
+
+ ;; Result now on top of stack, put it in the right register
+ (cond
+ ((or (alien-integer-type-p result-type)
+ (alien-pointer-type-p result-type)
+ (alien-type-= #.(parse-alien-type 'system-area-pointer nil)
+ result-type))
+ (inst mov rax [rsp]))
+ ((or (alien-single-float-type-p result-type)
+ (alien-double-float-type-p result-type))
+ (inst movq xmm0 [rsp]))
+ ((alien-void-type-p result-type))
+ (t
+ (error "unrecognized alien type: ~A" result-type)))
+
+ ;; Pop the arguments and the return value from the stack to get
+ ;; the return address at top of stack.
+ (inst add rsp (* (1+ (length argument-types)) n-word-bytes))
+ ;; Return
+ (inst ret))
+ (finalize-segment segment)
+ ;; Now that the segment is done, convert it to a static
+ ;; vector we can point foreign code to.
+ (let ((buffer (sb!assem::segment-buffer segment)))
+ (make-static-vector (length buffer)
+ :element-type '(unsigned-byte 8)
+ :initial-contents buffer)))))
projects / sbcl.git / blobdiff