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#!/bin/sh

# Generate mova.md, a file containing patterns that can be implemented

# using the h8sx mova instruction.

echo ";; -*- buffer-read-only: t -*-"

echo ";; Generated automatically from genmova.sh"

# Loop over modes for the source operand (the index).  Only 8-bit and

# 16-bit indices are allowed.

for s in QI HI; do

  # Set $src to the operand syntax for this size of index.

  case $s in

    QI) src=%X1.b;;

    HI) src=%T1.w;;

  esac

  # A match_operand for the source.

  operand="(match_operand:$s 1 \"h8300_dst_operand\" \"0,rQ\")"

  # Loop over the destination register's mode.  The QI and HI versions use

  # the same instructions as the SI ones, they just ignore the upper bits

  # of the result.

  for d in QI HI SI; do

    # If the destination is larger than the source, include a

    # zero_extend/plus pattern.  We could also match zero extensions

    # of memory without the plus, but it's not any smaller or faster

    # than separate insns.

    case $d:$s in

      SI:QI | SI:HI | HI:QI)

        cat <<EOF

(define_insn ""

  [(set (match_operand:$d 0 "register_operand" "=r,r")

        (plus:$d (zero_extend:$d $operand)

                 (match_operand:$d 2 "immediate_operand" "i,i")))]

  "TARGET_H8300SX"

  "mova/b.l @(%o2,$src),%S0"

  [(set_attr "length_table" "mova")

   (set_attr "cc" "none")])

EOF

        ;;

    esac

    # Loop over the shift amount.

    for shift in 1 2; do

      case $shift in

        1) opsize=w mult=2;;

        2) opsize=l mult=4;;

      esac

      # Calculate the mask of bits that will be nonzero after the source

      # has been extended and shifted.

      case $s:$shift in

        QI:1) mask=510;;

        QI:2) mask=1020;;

        HI:1) mask=131070;;

        HI:2) mask=262140;;

      esac

      # There doesn't seem to be a well-established canonical form for

      # some of the patterns we need.  Emit both shift and multiplication

      # patterns.

      for form in mult ashift; do

        case $form in

          mult) amount=$mult;;

          ashift) amount=$shift;;

        esac

        case $d:$s in

          # If the source and destination are the same size, we can treat

          # mova as a sort of multiply-add instruction.

          QI:QI | HI:HI)

            cat <<EOF

(define_insn ""

  [(set (match_operand:$d 0 "register_operand" "=r,r")

        (plus:$d ($form:$d $operand

                           (const_int $amount))

                 (match_operand:$d 2 "immediate_operand" "i,i")))]

  "TARGET_H8300SX"

  "mova/$opsize.l @(%o2,$src),%S0"

  [(set_attr "length_table" "mova")

   (set_attr "cc" "none")])

EOF

            ;;

          # Handle the cases where the source is smaller than the

          # destination.  Sometimes combine will keep the extension,

          # sometimes it will use an AND.

          SI:QI | SI:HI | HI:QI)

            # Emit the forms that use zero_extend.

            cat <<EOF

(define_insn ""

  [(set (match_operand:$d 0 "register_operand" "=r,r")

        ($form:$d (zero_extend:$d $operand)

                  (const_int $amount)))]

  "TARGET_H8300SX"

  "mova/$opsize.l @(0,$src),%S0"

  [(set_attr "length_table" "mova_zero")

   (set_attr "cc" "none")])

(define_insn ""

  [(set (match_operand:$d 0 "register_operand" "=r,r")

        (plus:$d ($form:$d (zero_extend:$d $operand)

                           (const_int $amount))

                 (match_operand:$d 2 "immediate_operand" "i,i")))]

  "TARGET_H8300SX"

  "mova/$opsize.l @(%o2,$src),%S0"

  [(set_attr "length_table" "mova")

   (set_attr "cc" "none")])

EOF

            # Now emit the forms that use AND.  When the index is a register,

            # these forms are effectively $d-mode operations: the index will

            # be a $d-mode REG or SUBREG.  When the index is a memory

            # location, we will have a paradoxical subreg such as:

            #

            #   (and:SI (mult:SI (subreg:SI (mem:QI ...) 0)

            #                    (const_int 4))

            #           (const_int 1020))

            #

            # Match the two case separately: a $d-mode register_operand

            # or a $d-mode subreg of an $s-mode memory_operand.  Match the

            # memory form first since register_operand accepts mem subregs

            # before reload.

            memory="(match_operand:$s 1 \"memory_operand\" \"m\")"

            memory="(subreg:$d $memory 0)"

            register="(match_operand:$d 1 \"register_operand\" \"0\")"

            for paradoxical in "$memory" "$register"; do

              cat <<EOF

(define_insn ""

  [(set (match_operand:$d 0 "register_operand" "=r")

        (and:$d ($form:$d $paradoxical

                          (const_int $amount))

                (const_int $mask)))]

  "TARGET_H8300SX"

  "mova/$opsize.l @(0,$src),%S0"

  [(set_attr "length_table" "mova_zero")

   (set_attr "cc" "none")])

(define_insn ""

  [(set (match_operand:$d 0 "register_operand" "=r")

        (plus:$d (and:$d ($form:$d $paradoxical

                                   (const_int $amount))

                         (const_int $mask))

                 (match_operand:$d 2 "immediate_operand" "i")))]

  "TARGET_H8300SX"

  "mova/$opsize.l @(%o2,$src),%S0"

  [(set_attr "length_table" "mova")

   (set_attr "cc" "none")])

EOF

              done

            ;;

        esac

      done

    done

  done

done