Subversion Repositories scarts

; SCARTS generic architecture description.  -*- Scheme -*-
; Copyright 2000, 2001 Free Software Foundation, Inc.
; Contributed by Martin Walter <mwalter@opencores.org>
;
; This file is part of the GNU Binutils.
;
; This program 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 of the License, or
; (at your option) any later version.
;
; This program 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 this program; if not, write to the Free Software
; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
;

;-------------------------------
; Instruction Field Definitions
;-------------------------------

; Opcode fields
(dnf f-opc-4    "4-bit opcode field"                 ()             15  4)
(dnf f-opc-5    "5-bit opcode field"                 ()             15  5)
(dnf f-opc-6    "6-bit opcode field"                 ()             15  6)
(dnf f-opc-7    "7-bit opcode field"                 ()             15  7)
(dnf f-opc-8    "8-bit opcode field"                 ()             15  8)
(dnf f-opc-12   "12-bit opcode field"                ()             15 12)
(dnf f-opc-16   "16-bit opcode field"                ()             15 16)

; Register fields
(dnf f-reg-x    "Register field (rX)"                ()              3  4)
(dnf f-reg-y    "Register field (rY)"                ()              7  4)

; Immediate fields
(df f-uimm-4    "4-bit unsigned immediate field"     ()                       7  4  UINT #f #f)
(df f-simm-5    "5-bit signed immediate field"       ()                       8  5   INT #f #f)
(df f-uimm-5    "5-bit unsigned immediate field"     ()                       8  5  UINT #f #f)
(df f-simm-6    "6-bit signed immediate field"       ()                       9  6   INT #f #f)
(df f-simm-7    "7-bit signed immediate field"       ()                      10  7   INT #f #f)
(df f-simm-8    "8-bit signed immediate field"       ()                      11  8   INT #f #f)
(df f-uimm-8    "8-bit unsigned immediate field"     ()                      11  8  UINT #f #f)
(df f-simm-10   "10-bit signed immediate field"      (SIGN-OPT PCREL-ADDR)    9 10   INT #f #f)

;----------------------
; Hardware Definitions
;----------------------

; Program counter
(dsh h-pc "program counter" (PC) (pc))

; Special-purpose registers
(dnh h-simm-8    "8-bit signed immediate register"     ()   (immediate (INT 8))    () () ())
(dnh h-uimm-8    "8-bit unsigned immediate register"   ()   (immediate (UINT 8))   () () ())
(dnh h-simm-10   "10-bit signed immediate register"    ()   (immediate (INT 10))   () () ())

;----------------------
; Instruction Operands
;----------------------

; Immediate operands
(dnop uimm4    "4-bit unsigned immediate operand"   ()   h-uint   f-uimm-4)
(dnop simm5    "5-bit signed immediate operand"     ()   h-sint   f-simm-5)
(dnop uimm5    "5-bit unsigned immediate operand"   ()   h-uint   f-uimm-5)
(dnop simm6    "6-bit signed immediate operand"     ()   h-sint   f-simm-6)
(dnop simm7    "7-bit signed immediate operand"     ()   h-sint   f-simm-7)

(define-operand
  (name simm8)
  (comment "8-bit signed immediate operand")
  (type h-simm-8)
  (index f-simm-8)
  (handlers (parse "simm8"))
)

(define-operand
  (name uimm8)
  (comment "8-bit unsigned immediate operand")
  (type h-uimm-8)
  (index f-uimm-8)
  (handlers (parse "uimm8"))
)

(define-operand
  (name saddr10-pcrel)
  (comment "10-bit signed pc-relative address operand")
  (type h-simm-10)
  (index f-simm-10)
  (handlers (parse "saddr10_pcrel"))
)

; Register operands
(dnop regX   "register operand rX"   ()   h-gpr   f-reg-x)
(dnop regY   "register operand rY"   ()   h-gpr   f-reg-y)

;--------------
; Instructions
;--------------

; OPC4-REG-SIMM8 instructions
(define-pmacro (m-opc4-reg-simm8-insn mnemonic sym comment attributes)
  (dni mnemonic comment
    attributes
    (.str mnemonic " $regX,$simm8")
    (+ (.sym OPC4_ sym) simm8 regX)
    (nop)
    ()
  )
)

; OPC4-REG_UIMM8 instructions
(define-pmacro (m-opc4-reg-uimm8-insn mnemonic sym comment attributes)
  (dni mnemonic comment
    attributes
    (.str mnemonic " $regX,$uimm8")
    (+ (.sym OPC4_ sym) uimm8 regX)
    (nop)
    ()
  )
)

; OPC5-REG-SIMM7 instructions
(define-pmacro (m-opc5-reg-simm7-insn mnemonic sym comment attributes)
  (dni mnemonic comment
    attributes
    (.str mnemonic " $regX,$simm7")
    (+ (.sym OPC5_ sym) simm7 regX)
    (nop)
    ()
  )
)

; OPC6-REG-SIMM6 instructions
(define-pmacro (m-opc6-reg-simm6-insn mnemonic sym comment attributes)
  (dni mnemonic comment
    attributes
    (.str mnemonic " $regX,$simm6")
    (+ (.sym OPC6_ sym) simm6 regX)
    (nop)
    ()
  )
)

; OPC6-SADDR10-PCREL instructions
(define-pmacro (m-opc6-saddr10-pcrel-insn mnemonic sym comment attributes)
  (dni mnemonic comment
    attributes
    (.str mnemonic " ${saddr10-pcrel}")
    (+ (.sym OPC6_ sym) saddr10-pcrel)
    (nop)
    ()
  )
)

; OPC7-REG-SIMM5 instructions
(define-pmacro (m-opc7-reg-simm5-insn mnemonic sym comment attributes)
  (dni mnemonic comment
    attributes
    (.str mnemonic " $regX,$simm5")
    (+ (.sym OPC7_ sym) simm5 regX)
    (nop)
    ()
  )
)

; OPC7-REG-UIMM5 instructions
(define-pmacro (m-opc7-reg-uimm5-insn mnemonic sym comment attributes)
  (dni mnemonic comment
    attributes
    (.str mnemonic " $regX,$uimm5")
    (+ (.sym OPC7_ sym) uimm5 regX)
    (nop)
    ()
  )
)

; OPC8-REG-UIMM4 instructions
(define-pmacro (m-opc8-reg-uimm4-insn mnemonic sym comment attributes)
  (dni mnemonic comment
    attributes
    (.str mnemonic " $regX,$uimm4")
    (+ (.sym OPC8_ sym) uimm4 regX)
    (nop)
    ()
  )
)

; OPC8-REG-REG instructions
(define-pmacro (m-opc8-reg-reg-insn mnemonic sym comment attributes)
  (dni mnemonic comment
    attributes
    (.str mnemonic " $regX,$regY")
    (+ (.sym OPC8_ sym) regY regX)
    (nop)
    ()
  )
)

; OPC12-REG instructions
(define-pmacro (m-opc12-reg-insn mnemonic sym comment attributes)
  (dni mnemonic comment
    attributes
    (.str mnemonic " $regX")
    (+ (.sym OPC12_ sym) regX)
    (nop)
    ()
  )
)

; OPC16 instructions
(define-pmacro (m-opc16-insn mnemonic sym comment attributes)
  (dni mnemonic comment
    attributes
    (.str mnemonic "")
    (+ (.sym OPC16_ sym))
    (nop)
    ()
  )
)