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;; Machine Descriptions for R8C/M16C/M32C

;; Copyright (C) 2006, 2007, 2010

;; 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 3, 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 COPYING3.  If not see

;; .

;; various block move instructions

;; R8C:

;;  SMOVB - while (r3--) { *a1-- = *r1ha0--; } - memcpy

;;  SMOVF - while (r3--) { *a1++ = *r1ha0++; } - memcpy

;;  SSTR  - while (r3--) { *a1++ = [r0l,r0]; } - memset

;; M32CM:

;;  SCMPU - while (*a0 && *a0 != *a1) { a0++; a1++; } - strcmp

;;  SIN   - while (r3--) { *a1++ = *a0; }

;;  SMOVB - while (r3--) { *a1-- = *a0--; } - memcpy

;;  SMOVF - while (r3--) { *a1++ = *a0++; } - memcpy

;;  SMOVU - while (*a1++ = *a0++) ; - strcpy

;;  SOUT  - while (r3--) { *a1 = *a0++; }

;;  SSTR  - while (r3--) { *a1++ = [r0l,r0]; } - memset

;; 0 = destination (mem:BLK ...)

;; 1 = source (mem:BLK ...)

;; 2 = count

;; 3 = alignment

(define_expand "movmemhi"

  [(match_operand 0 "ap_operand" "")

   (match_operand 1 "ap_operand" "")

   (match_operand 2 "m32c_r3_operand" "")

   (match_operand 3 "" "")

   ]

  ""

  "if (m32c_expand_movmemhi(operands)) DONE; FAIL;"

  )

;; We can't use mode iterators for these because M16C uses r1h to extend

;; the source address, for copying data from ROM to RAM.  We don't yet

;; support that, but we need to zero our r1h, so the patterns differ.

;; 0 = dest (out)

;; 1 = src (out)

;; 2 = count (out)

;; 3 = dest (in)

;; 4 = src (in)

;; 5 = count (in)

(define_insn "movmemhi_bhi_op"

  [(set (mem:QI (match_operand:HI 3 "ap_operand" "0"))

        (mem:QI (match_operand:HI 4 "ap_operand" "1")))

   (set (match_operand:HI 2 "m32c_r3_operand" "=R3w")

        (const_int 0))

   (set (match_operand:HI 0 "ap_operand" "=Ra1")

        (plus:HI (match_dup 3)

                  (zero_extend:HI (match_operand:HI 5 "m32c_r3_operand" "2"))))

   (set (match_operand:HI 1 "ap_operand" "=Ra0")

        (plus:HI (match_dup 4)

                  (zero_extend:HI (match_dup 5))))

   (use (reg:HI R1_REGNO))]

  "TARGET_A16"

  "mov.b:q\t#0,r1h\n\tsmovf.b\t; %0[0..%2-1]=r1h%1[]"

  )

(define_insn "movmemhi_bpsi_op"

  [(set (mem:QI (match_operand:PSI 3 "ap_operand" "0"))

        (mem:QI (match_operand:PSI 4 "ap_operand" "1")))

   (set (match_operand:HI 2 "m32c_r3_operand" "=R3w")

        (const_int 0))

   (set (match_operand:PSI 0 "ap_operand" "=Ra1")

        (plus:PSI (match_dup 3)

                  (zero_extend:PSI (match_operand:HI 5 "m32c_r3_operand" "2"))))

   (set (match_operand:PSI 1 "ap_operand" "=Ra0")

        (plus:PSI (match_dup 4)

                  (zero_extend:PSI (match_dup 5))))]

  "TARGET_A24"

  "smovf.b\t; %0[0..%2-1]=%1[]"

  )

(define_insn "movmemhi_whi_op"

  [(set (mem:HI (match_operand:HI 3 "ap_operand" "0"))

        (mem:HI (match_operand:HI 4 "ap_operand" "1")))

   (set (match_operand:HI 2 "m32c_r3_operand" "=R3w")

        (const_int 0))

   (set (match_operand:HI 0 "ap_operand" "=Ra1")

        (plus:HI (match_dup 3)

                  (zero_extend:HI (match_operand:HI 5 "m32c_r3_operand" "2"))))

   (set (match_operand:HI 1 "ap_operand" "=Ra0")

        (plus:HI (match_dup 4)

                  (zero_extend:HI (match_dup 5))))

   (use (reg:HI R1_REGNO))]

  "TARGET_A16"

  "mov.b:q\t#0,r1h\n\tsmovf.w\t; %0[0..%2-1]=r1h%1[]"

  )

(define_insn "movmemhi_wpsi_op"

  [(set (mem:HI (match_operand:PSI 3 "ap_operand" "0"))

        (mem:HI (match_operand:PSI 4 "ap_operand" "1")))

   (set (match_operand:HI 2 "m32c_r3_operand" "=R3w")

        (const_int 0))

   (set (match_operand:PSI 0 "ap_operand" "=Ra1")

        (plus:PSI (match_dup 3)

                  (zero_extend:PSI (match_operand:HI 5 "m32c_r3_operand" "2"))))

   (set (match_operand:PSI 1 "ap_operand" "=Ra0")

        (plus:PSI (match_dup 4)

                  (zero_extend:PSI (match_dup 5))))]

  "TARGET_A24"

  "smovf.w\t; %0[0..%2-1]=%1[]"

  )

;; 0 = destination (mem:BLK ...)

;; 1 = number of bytes

;; 2 = value to store

;; 3 = alignment

(define_expand "setmemhi"

  [(match_operand 0 "ap_operand" "")

   (match_operand 1 "m32c_r3_operand" "")

   (match_operand 2 "m32c_r0_operand" "")

   (match_operand 3 "" "")

   ]

  "TARGET_A24"

  "if (m32c_expand_setmemhi(operands)) DONE; FAIL;"

  )

;; 0 = address (out)

;; 1 = count (out)

;; 2 = value (in)

;; 3 = address (in)

;; 4 = count (in)

(define_insn "setmemhi_b_op"

  [(set (mem:QI (match_operand:HPSI 3 "ap_operand" "0"))

        (match_operand:QI 2 "m32c_r0_operand" "R0w"))

   (set (match_operand:HI 1 "m32c_r3_operand" "=R3w")

        (const_int 0))

   (set (match_operand:HPSI 0 "ap_operand" "=Ra1")

        (plus:HPSI (match_dup 3)

                  (zero_extend:HPSI (match_operand:HI 4 "m32c_r3_operand" "1"))))]

  "TARGET_A24"

  "sstr.b\t; %0[0..%1-1]=%2"

  )

(define_insn "setmemhi_w_op"

  [(set (mem:HI (match_operand:HPSI 3 "ap_operand" "0"))

        (match_operand:HI 2 "m32c_r0_operand" "R0w"))

   (set (match_operand:HI 1 "m32c_r3_operand" "=R3w")

        (const_int 0))

   (set (match_operand:HPSI 0 "ap_operand" "=Ra1")

        (plus:HPSI (match_dup 3)

                  (zero_extend:HPSI (match_operand:HI 4 "m32c_r3_operand" "1"))))]

  "TARGET_A24"

  "sstr.w\t; %0[0..%1-1]=%2"

  )

;; SCMPU sets the flags according to the result of the string

;; comparison.  GCC wants the result to be a signed value reflecting

;; the result, which it then compares to zero.  Hopefully we can

;; optimize that later (see peephole in cond.md).  Meanwhile, the

;; strcmp builtin is expanded to a SCMPU followed by a flags-to-int

;; pattern in cond.md.

;; 0 = result:HI

;; 1 = destination (mem:BLK ...)

;; 2 = source (mem:BLK ...)

;; 3 = alignment

(define_expand "cmpstrsi"

  [(match_operand:HI 0 "" "")

   (match_operand 1 "ap_operand" "")

   (match_operand 2 "ap_operand" "")

   (match_operand 3 "" "")

   ]

  "TARGET_A24"

  "if (m32c_expand_cmpstr(operands)) DONE; FAIL;"

  )

;; 0 = string1

;; 1 = string2

(define_insn "cmpstrhi_op"

  [(set (reg:CC FLG_REGNO)

        (compare:CC (mem:BLK (match_operand:PSI 0 "ap_operand" "Ra0"))

                    (mem:BLK (match_operand:PSI 1 "ap_operand" "Ra1"))))

   (clobber (match_operand:PSI 2 "ap_operand" "=0"))

   (clobber (match_operand:PSI 3 "ap_operand" "=1"))]

  "TARGET_A24"

  "scmpu.b\t; flags := strcmp(*%0,*%1)"

  [(set_attr "flags" "oszc")]

  )

;; Note that SMOVU leaves the address registers pointing *after*

;; the NUL at the end of the string.  This is not what gcc expects; it

;; expects the address registers to point *at* the NUL.  The expander

;; must emit a suitable add insn.

;; 0 = target: set to &NUL in dest

;; 1 = destination (mem:BLK ...)

;; 2 = source (mem:BLK ...)

(define_expand "movstr"

  [(match_operand 0 "m32c_nonimmediate_operand" "")

   (match_operand 1 "ap_operand" "")

   (match_operand 2 "ap_operand" "")

   ]

  "TARGET_A24"

  "if (m32c_expand_movstr(operands)) DONE; FAIL;"

  )

;; 0 = dest (out)

;; 1 = src (out) (clobbered)

;; 2 = dest (in)

;; 3 = src (in)

(define_insn "movstr_op"

  [(set (mem:BLK (match_operand:PSI 2 "ap_operand" "0"))

        (mem:BLK (match_operand:PSI 3 "ap_operand" "1")))

   (set (match_operand:PSI 0 "ap_operand" "=Ra1")

        (plus:PSI (match_dup 2)

                  (unspec:PSI [(const_int 0)] UNS_SMOVU)))

   (set (match_operand:PSI 1 "ap_operand" "=Ra0")

        (plus:PSI (match_dup 3)

                  (unspec:PSI [(const_int 0)] UNS_SMOVU)))]

  "TARGET_A24"

  "smovu.b\t; while (*%2++ := *%3++) != 0"

  [(set_attr "flags" "*")]

  )