jump.md

linux下编程用 编译软件

;; Machine Descriptions for R8C/M16C/M32C
;; Copyright (C) 2005
;; Free Software Foundation, Inc.
;; Contributed by Red Hat.
;;
;; This file is part of GCC.
;;
;; GCC is free software; you can redistribute it and/or modify it
;; under the terms of the GNU General Public License as published
;; by the Free Software Foundation; either version 2, or (at your
;; option) any later version.
;;
;; GCC is distributed in the hope that it will be useful, but WITHOUT
;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
;; or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
;; License for more details.
;;
;; You should have received a copy of the GNU General Public License
;; along with GCC; see the file COPYING.  If not, write to the Free
;; Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
;; 02110-1301, USA.

;; jump, conditionals, calls, etc

(define_insn "indirect_jump_16"
  [(set (pc)
       (match_operand:HI 0 "register_operand" "Rhi"))]
  "TARGET_A16"
;  "jmpi.a\t%0"
  ; no 16 bit jmpi in r8c
  "push.b #0 | push.w\t%0 | rts"
  )

(define_insn "indirect_jump_24"
  [(set (pc)
       (match_operand:PSI 0 "register_operand" "Rpi"))]
  "TARGET_A24"
  "jmpi.a\t%0"
  )

(define_expand "indirect_jump"
  [(match_operand 0 "register_operand" "")]
  ""
  "if (TARGET_A16)
     emit_jump_insn (gen_indirect_jump_16(operands[0]));
   else
     emit_jump_insn (gen_indirect_jump_24(operands[0]));
   DONE;"
  )

; We can replace this with jmp.s when gas supports relaxing.  m32c
; opcodes are too complicated to try to compute their sizes here, it's
; far easier (and more reliable) to let gas worry about it.
(define_insn "jump"
  [(set (pc)
	(label_ref (match_operand 0 "" "")))]
  ""
  "jmp.a\t%l0"
)

; No 16 bit indirect calls on r8c/m16c.  */
(define_insn "call"
  [(call (match_operand:QI 0 "memory_operand" "Si,SaSb,?Rmm")
	 (match_operand 1 "" ""))
   (use (match_operand 2 "immediate_operand" ""))]
  ""
  "*
switch (which_alternative) {
  case 0: return \"jsr.a\t%0\";
  case 1: return TARGET_A16 ? \"push.w %a0 | jsr.a\tm32c_jsri16\" : \"jsri.a\t%a0\";
  case 2: return \"jsri.a\t%a0\";
}"
  )

(define_insn "call_value"
  [(set (match_operand 0 "m32c_return_operand" "=RdiRmmRpa,RdiRmmRpa,RdiRmmRpa")
	(call (match_operand:QI 1 "memory_operand" "Si,SaSb,?Rmm")
	      (match_operand 2 "" "")))
   (use (match_operand 3 "immediate_operand" ""))]
  ""
  "*
switch (which_alternative) {
  case 0: return \"jsr.a\t%1\";
  case 1: return TARGET_A16 ? \"push.w %a1 | jsr.a\tm32c_jsri16\" : \"jsri.a\t%a1\";
  case 2: return \"jsri.a\t%a1\";
}"
  )