cpu/mep-rhcop.cpu

; Copyright 2011 Free Software Foundation, Inc.
;
; Contributed by Red Hat Inc;
;
; 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 3 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., 51 Franklin Street - Fifth Floor, Boston,
; MA 02110-1301, USA.

;; This coprocessor definition is being used to verify vliw mode behaviour.
;; This is a mock-up done by Red Hat and is in no way supposed to represent
;; a real coprocessor.  The hardware is defined in mep-core.cpu.

; Coprocessor registers
(define-pmacro rh-isa-1 () (ISA ext_cop1_16,ext_cop1_32,ext_cop1_48,ext_cop1_64))

(define-hardware
  (name h-cr64-rh-1)
  (comment "64-bit coprocessor registers for rh coprocessor for core 1")
  (attrs VIRTUAL rh-isa-1)
  (type register DI (32))
  (set (index newval) (c-call VOID "h_cr64_set" index newval))
  (get (index) (c-call DI "h_cr64_get" index))
  (indices keyword "$c" (.map -reg-pair (.iota 32)))
)

(define-hardware
  (name h-cr-rh-1)
  (comment "32-bit coprocessor registers for rh coprocessor for core 1")
  (attrs VIRTUAL rh-isa-1)
  (type register SI (32))
  (set (index newval) (c-call VOID "h_cr64_set" index (ext DI newval)))
  (get (index) (trunc SI (c-call DI "h_cr64_get" index)))
  (indices keyword "$c" (.map -reg-pair (.iota 32)))
)

(define-hardware
  (name h-ccr-rh-1)
  (comment "Coprocessor control registers for rh coprocessor for core 1")
  (attrs VIRTUAL rh-isa-1)
  (type register SI (64))
  (set (index newval) (c-call VOID "h_ccr_set" index newval))
  (get (index) (c-call DI "h_ccr_get" index))
  (indices keyword "" (.map -ccr-reg-pair (.iota 64)))
)
 
; ifields For 16-bit insns
(dnf f-cphigh4 "High 4 bits" 		((ISA ext_cop1_16,ext_cop1_32,ext_cop1_48,ext_cop1_64))   0  4)
(dnf f-cpcrn   "Copro Reg"  		((ISA ext_cop1_16,ext_cop1_32,ext_cop1_48,ext_cop1_64))   4  5)
(dnf f-cpcrm   "Copro Reg"  		((ISA ext_cop1_16,ext_cop1_32,ext_cop1_48,ext_cop1_64))  11  5)
(dnf f-uu2   "UU for 16-bit insns"      ((ISA ext_cop1_16))   9  2)
(dnf f-uu3   "UU for 16-bit insns"      ((ISA ext_cop1_16))   9  3)
(dnf f-cprm   "Core GPR"                ((ISA ext_cop1_16))  12  4)

; ifields For 32-bit insns (some of the above are used too)
; Notes: 
; 
;  f-alone: A value of 0111 means that the insn can run alone in 
;           one of the vliw modes.  
;
;  f-seg32:   Together f-seg32 and f-seg32-a allow 64 different 32-bit 
;  f-seg32-a: insns to be defined.
(dnf f-seg32 "Enumerate 32 bit-insns"     ((ISA ext_cop1_32))   9  3)
(dnf f-alone "Run-alone indicator"        ((ISA ext_cop1_16,ext_cop1_32,ext_cop1_64))  12  4) 
(dnf f-seg32-a "Enumerate 32 bit-insns"   ((ISA ext_cop1_32))  21  3)
(dnf f-code8 "8 bit unsigned immediate"   ((ISA ext_cop1_32))  24 8)
(dnf f-cpcrm-32 "Corpocessor Reg"         ((ISA ext_cop1_32))  16  5)

; ifields for 48-bit insns
; Note: Part of f-uu12 can be broken off later to enumerate 
;       any 48-bit insns that may be added. 
(dnf f-uu12 "Unusued 12 bits"            ((ISA ext_cop1_48))   4 12)
(dnf f-code16a "Unsigned immediate"      ((ISA ext_cop1_48))  16 16)
(dnf f-code16b "Unsigned immediate"      ((ISA ext_cop1_48,ext_cop1_64))  32 16)

; ifields for 64-bit insns
(dnf f-uu8 "Unsused 8 bits"               ((ISA ext_cop1_64))   4  8)
(dnf f-uu8a "Unused 13 bits"              ((ISA ext_cop1_64))  16  8)
(dnf f-seg64 "Enumerate 64-bit insns"     ((ISA ext_cop1_64))  24  8)
(dnf f-code16c "Unsigned immediate"       ((ISA ext_cop1_64))  48 16)
(dnf f-cpcrn-64 "Coprocessor Register"    ((ISA ext_cop1_64))  32  5)
(dnf f-cpcrm-64 "Coprocessor Register"    ((ISA ext_cop1_64))  37  4)
(dnf f-code23 "23 Bit Unisgned Immediate" ((ISA ext_cop1_64))  41 23)
(dnf f-cpccrn-64 "Coprocessor Register"   ((ISA ext_cop1_64))  32  4)
(dnf f-cpccrm-64 "Core GPR"               ((ISA ext_cop1_64))  36  4)
(dnf f-code24 "24 Bit Unisgned Immediate" ((ISA ext_cop1_64))  40 24)


; Operands for 16-bit insns
(dnop cpcrn   "cpcrn"  ((ISA ext_cop1_16,ext_cop1_32)) h-cr64-rh-1 f-cpcrn)
(dnop cpcrm   "cpcrm"  ((ISA ext_cop1_16,ext_cop1_32)) h-cr64-rh-1 f-cpcrm)
(dnop cprm    "cprm"   ((ISA ext_cop1_16)) h-gpr f-cprm)

; Additional operands for 32-bit insns 
(dnop code8 "imm8" ((ISA ext_cop1_32)) h-uint f-code8)

; Operands for 48-bit insns
(dnop code16a "code16a" ((ISA ext_cop1_48)) h-uint f-code16a)
(dnop code16b "code16b" ((ISA ext_cop1_48,ext_cop1_64)) h-uint f-code16b)

; Additional operands for 64-bit insns
(dnop code16c "code16c" ((ISA ext_cop1_64)) h-uint f-code16c)
(dnop cpcrn64 "cpcrn64" ((ISA ext_cop1_64)) h-cr64-rh-1 f-cpcrn-64)
(dnop cpcrm64 "crm64" ((ISA ext_cop1_64)) h-gpr f-cpcrm-64)
(dnop cpccrn64 "cpccrn64" ((ISA ext_cop1_64)) h-ccr-rh-1 f-cpccrn-64)
(dnop cpccrm64 "cpccrm64" ((ISA ext_cop1_64)) h-gpr f-cpccrm-64)
(dnop cpcode23 "cpcode23" ((ISA ext_cop1_64)) h-uint f-code23)
(dnop cpcode24 "cpcode24" ((ISA ext_cop1_64)) h-uint f-code24)



; 16- and 32-bit nops can be defined as normal instructions without
; any problems.  nops take no operands, so nops longer than 32 
; bits cannot be defined as normal insns since that would result in
; decodable bits beyond cgen's 32-bit boundary.  As a result, we
; have to use macros and other real insns to create 48- and 64-bit nops.
; 
; In addition, since the names of the nops that will be created as part
; of future insn sets are not known at this time, the assembler needs a
; fixed set of nop names that it can use for automatic nop insertion.  
; The idea is that no matter what those insns are called, we don't want
; to have to change the C code in the assemblers vliw grouping validation
; and nop insertion routines.  We therefore have to create macros for
; all nops to map the macro names which are known to the assembler to the
; names of the real nop insns.
;
; These emitted insns in these macros will need to be modified when
; new nops are defined in new coprocessor insn sets.

; A real 16-bit nop insn exists
(dnmi cpnop16 "cpnop16"
      ((ISA ext_cop1_16))
      "cpnop16"
      (emit cp16nop)
)

; A real 32-bit nop insn exists
(dnmi cpnop32 "cpnop32"
      ((ISA ext_cop1_32))
      "cpnop32"
      (emit cp32nop)
)

; There is no 48-bit nop insn so we use a real "dummy" insn to enable the nop.
(dnmi cpnop48 "cpnop48"
      ((ISA ext_cop1_48))
      "cpnop48"
      (emit cpf1nop (code16a 0) (code16b 0))
)

; There is no 64-bit nop insn so we use a real "dummy" insn to enable the nop.
(dnmi cpnop64 "cpnop64"
      ((ISA ext_cop1_64))
      "cpnop64"
      (emit cpf3nop (code16b 0) (code16c 0))
)


(define-pmacro (dncp116i xname xcomment xattrs xsyntax xformat xsemantics xtiming)  (dni-isa xname xcomment xattrs xsyntax xformat xsemantics xtiming ext_cop1_16))
(define-pmacro (dncp132i xname xcomment xattrs xsyntax xformat xsemantics xtiming)  (dni-isa xname xcomment xattrs xsyntax xformat xsemantics xtiming ext_cop1_32))
(define-pmacro (dncp148i xname xcomment xattrs xsyntax xformat xsemantics xtiming)  (dni-isa xname xcomment xattrs xsyntax xformat xsemantics xtiming ext_cop1_48))
(define-pmacro (dncp164i xname xcomment xattrs xsyntax xformat xsemantics xtiming)  (dni-isa xname xcomment xattrs xsyntax xformat xsemantics xtiming ext_cop1_64))

; 16-Bit Insns
(dncp116i movcp16 "16-bit coprocessor move insn"
        (VLIW64_NO_MATCHING_NOP)
        "movcp16 $cpcrn,$cpcrm"
        (+ (f-cphigh4 1) cpcrn (f-uu2 0) cpcrm)
        (set cpcrn cpcrm)
        () 
)

(dncp116i movcp16a "16-bit coprocessor move insn" 
	(VLIW64_NO_MATCHING_NOP)
	"movcp16a $cpcrn,$cprm"
        (+ (f-cphigh4 2) cpcrn (f-uu3 0) cprm)
        (set cpcrn (zext DI cprm))
        ()
)

(dncp116i movcp16b "16-bit coprocessor move insn" 
	(VLIW64_NO_MATCHING_NOP)
	"movcp16b $cprm,$cpcrn"
        (+ (f-cphigh4 3) cpcrn (f-uu3 0) cprm)
	(set cprm (subword SI cpcrn 1))
        ()
)

(dncp116i cp16nop "16-bit coprocessor nop" 
	(VLIW64_NO_MATCHING_NOP)
	"cp16nop"
        (+ (f-cphigh4 0) (f-cpcrn 0) (f-uu2 0) (f-cpcrm 0))
	(unimp "cp16nop")
        ()
)

; 32-Bit Insns
(dncp132i cp32nop "32-bit coprocessor nop" 
	(VLIW64_NO_MATCHING_NOP)
	"cp32nop"
        (+ (f-cphigh4 #xf ) (f-cpcrn 0) (f-seg32 0) (f-alone #x7) 
           (f-cpcrm-32 0) (f-seg32-a 0) (f-code8 0))
	(unimp "cpnop32")
        ()
)

(dncp132i cpf2 "General 32-bit insn for compatibility with toshiba's tests " 
	(VLIW64_NO_MATCHING_NOP)
	"cpf2 $code8"
        (+ (f-cphigh4 #xf ) (f-cpcrn 0) (f-seg32 0) (f-alone #x7) 
           (f-cpcrm-32 0) (f-seg32-a 1) code8)
	(unimp "cpf2")
        ()
)

; 48-Bit Insns
(dncp148i cpf1 "48-bit coprocessor helper insn" 
	()
	"cpf1 $code16a,$code16b"
        (+ (f-cphigh4 4) (f-uu12 0) code16a code16b) 
	(sequence ((HI result))
           (if (eq code16a 0)
               (set pc (c-call USI "cop_exception" pc))
               ; Set branch condition flags to value of code16a[0:3]
               ; Branch condition flags do not exist yet.
               (nop)
           )
        )
        ()
)

(dncp148i cpf1nop "48-bit coprocessor nop insn" 
	()
	"cpf1nop $code16a,$code16b"
        (+ (f-cphigh4 5) (f-uu12 0) code16a code16b) 
	(sequence ((HI result))
           (set result (add code16a code16b))
        )
        ()
)

; 64-Bit Insns
(dncp164i cpf3 "64-bit coprocessor helper insn" 
	()
	"cpf3 $code16b,$code16c"
        (+ (f-cphigh4 #xf) (f-uu8 0) (f-alone 7) (f-uu8a 0) 
           (f-seg64 0) code16b code16c)
	(sequence ((HI result))
           (set result (add code16b code16c))
        )
        ()
)

(dncp164i cpf3nop "64-bit coprocessor helper insn" 
	()
	"cpf3nop $code16b,$code16c"
        (+ (f-cphigh4 #xf) (f-uu8 0) (f-alone 7) (f-uu8a 0) 
           (f-seg64 7) code16b code16c)
	(sequence ((HI result))
           (set result (add code16b code16c))
        )
        ()
)

(dncp164i cmov64a "64-bit cmov" 
	()
	"cmov64a $cpcrn64,$cpcrm64,$cpcode23"
        (+ (f-cphigh4 #xf ) (f-uu8 0) (f-alone 7) (f-uu8a 0) 
           (f-seg64 1) cpcrn64 cpcrm64 cpcode23) 
        (sequence ((SI dummy))
           (set dummy cpcode23)
           (set cpcrn64 (zext DI cpcrm64)))
        ()
)

(dncp164i cmov64b "64-bit cmov" 
	()
	"cmov64b $cpcrm64,$cpcrn64,$cpcode23"
        (+ (f-cphigh4 #xf ) (f-uu8 0) (f-alone 7) (f-uu8a 0) 
           (f-seg64 2) cpcrn64 cpcrm64 cpcode23) 
        (sequence ((SI dummy))
          (set dummy cpcode23)
          (set cpcrm64 (subword SI cpcrn64 1)))
        ()
)

(dncp164i cmovh64a "64-bit cmovh" 
	()
	"cmovh64a $cpcrn64,$cpcrm64,$cpcode23"
        (+ (f-cphigh4 #xf ) (f-uu8 0) (f-alone 7) (f-uu8a 0) 
           (f-seg64 3) cpcrn64 cpcrm64 cpcode23) 
        (sequence ((SI dummy))
           (set dummy cpcode23)
           (set cpcrn64 (or (sll (zext DI cpcrm64) 32) (zext DI (subword SI cpcrn64 1)))))
        ()
)

(dncp164i cmovh64b "64-bit cmovh" 
	()
	"cmovh64b $cpcrm64,$cpcrn64,$cpcode23"
        (+ (f-cphigh4 #xf ) (f-uu8 0) (f-alone 7) (f-uu8a 0) 
           (f-seg64 4) cpcrn64 cpcrm64 cpcode23) 
        (sequence ((SI dummy))
           (set dummy cpcode23)
           (set cpcrm64 (subword SI cpcrn64 0)))
        ()
)

(dncp164i cmovc64a "64-bit cmovc" 
	()
	"cmovc64a $cpccrn64,$cpccrm64,$cpcode24"
        (+ (f-cphigh4 #xf ) (f-uu8 0) (f-alone 7) (f-uu8a 0) 
           (f-seg64 5) cpccrn64 cpccrm64 cpcode24) 
        (sequence ((SI dummy))
           (set dummy cpcode24)
           (set cpccrn64 cpccrm64))
        ()
)

(dncp164i cmovc64b "64-bit cmovc" 
	()
	"cmovc64b $cpccrm64,$cpccrn64,$cpcode24"
        (+ (f-cphigh4 #xf ) (f-uu8 0) (f-alone 7) (f-uu8a 0) 
           (f-seg64 6) cpccrn64 cpccrm64 cpcode24) 
        (sequence ((SI dummy))
           (set dummy cpcode24)
           (set cpccrm64 cpccrn64))
        ()
)