;;;; the machine-specific support routines needed by the file assembler;;;; 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")(!def-vm-support-routine generate-call-sequence (name style vop)  (ecase style    ((:raw :none)     (values      `((inst jal (make-fixup ',name :assembly-routine))        (inst nop))      `()))    (:full-call     (let ((temp (make-symbol "TEMP"))           (nfp-save (make-symbol "NFP-SAVE"))           (lra (make-symbol "LRA")))       (values        `((let ((lra-label (gen-label))                (cur-nfp (current-nfp-tn ,vop)))            (when cur-nfp              (store-stack-tn ,nfp-save cur-nfp))            (inst compute-lra-from-code ,lra code-tn lra-label ,temp)            (note-next-instruction ,vop :call-site)            (inst j (make-fixup ',name :assembly-routine))            (inst nop)            (without-scheduling ()              (emit-return-pc lra-label)              (note-this-location ,vop :single-value-return)              (inst move csp-tn ocfp-tn)              (inst nop))            (inst compute-code-from-lra code-tn code-tn                  lra-label ,temp)            (when cur-nfp              (load-stack-tn cur-nfp ,nfp-save))))        `((:temporary (:scs (non-descriptor-reg) :from (:eval 0) :to (:eval 1))                      ,temp)          (:temporary (:sc descriptor-reg :offset lra-offset                       :from (:eval 0) :to (:eval 1))                      ,lra)          (:temporary (:scs (control-stack) :offset nfp-save-offset)                      ,nfp-save)          (:save-p t)))))))(!def-vm-support-routine generate-return-sequence (style)  (ecase style    (:raw     `((inst j lip-tn)       (inst nop)))    (:full-call     `((lisp-return (make-random-tn :kind :normal                                    :sc (sc-or-lose                                         'descriptor-reg)                                    :offset lra-offset)                    lip-tn :offset 2)))    (:none)))(defun return-machine-address (scp)  (context-register scp lip-offset))