src/assembly/sparc/support.lisp

   1 ;;;; the machine-specific support routines needed by the file assembler
   2
   3 ;;;; This software is part of the SBCL system. See the README file for
   4 ;;;; more information.
   5 ;;;;
   6 ;;;; This software is derived from the CMU CL system, which was
   7 ;;;; written at Carnegie Mellon University and released into the
   8 ;;;; public domain. The software is in the public domain and is
   9 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
  10 ;;;; files for more information.
  11
  12 (in-package "SB!VM")
  13
  14 (!def-vm-support-routine generate-call-sequence (name style vop)
  15   (ecase style
  16     ((:raw :none)
  17      (let ((temp (make-symbol "TEMP"))
  18            (lip (make-symbol "LIP")))
  19        (values
  20         `((inst jali ,lip ,temp (make-fixup ',name :assembly-routine))
  21           (inst nop))
  22         `((:temporary (:scs (non-descriptor-reg) :from (:eval 0) :to (:eval 1))
  23                       ,temp)
  24           (:temporary (:scs (interior-reg) :from (:eval 0) :to (:eval 1))
  25                       ,lip)))))
  26     (:full-call
  27      (let ((temp (make-symbol "TEMP"))
  28            (nfp-save (make-symbol "NFP-SAVE"))
  29            (lra (make-symbol "LRA")))
  30        (values
  31         `((let ((lra-label (gen-label))
  32                 (cur-nfp (current-nfp-tn ,vop)))
  33             (when cur-nfp
  34               (store-stack-tn ,nfp-save cur-nfp))
  35             (inst compute-lra-from-code ,lra code-tn lra-label ,temp)
  36             (note-next-instruction ,vop :call-site)
  37             (inst ji ,temp (make-fixup ',name :assembly-routine))
  38             (inst nop)
  39             (emit-return-pc lra-label)
  40             (note-this-location ,vop :single-value-return)
  41             (without-scheduling ()
  42               (move csp-tn ocfp-tn)
  43               (inst nop))
  44             (inst compute-code-from-lra code-tn code-tn
  45                   lra-label ,temp)
  46             (when cur-nfp
  47               (load-stack-tn cur-nfp ,nfp-save))))
  48         `((:temporary (:scs (non-descriptor-reg) :from (:eval 0) :to (:eval 1))
  49                       ,temp)
  50           (:temporary (:sc descriptor-reg :offset lra-offset
  51                            :from (:eval 0) :to (:eval 1))
  52                       ,lra)
  53           (:temporary (:scs (control-stack) :offset nfp-save-offset)
  54                       ,nfp-save)
  55           (:save-p :compute-only)))))))
  56
  57 (!def-vm-support-routine generate-return-sequence (style)
  58   (ecase style
  59     (:raw
  60      `((inst j
  61              (make-random-tn :kind :normal
  62                              :sc (sc-or-lose 'interior-reg)
  63                              :offset lip-offset)
  64              8)
  65        (inst nop)))
  66     (:full-call
  67      `((lisp-return (make-random-tn :kind :normal
  68                                     :sc (sc-or-lose 'descriptor-reg)
  69                                     :offset lra-offset)
  70                     :offset 2)))
  71     (:none)))
  72
  73 (defun return-machine-address (scp)
  74   (+ (context-register scp lip-offset) 8))