Module: HDLRuby::High::Std::SEnumerable

Included in:
AnyRange, SEnumerator
Defined in:
lib/HDLRuby/std/sequencer.rb

Overview

Module adding functionalities to object including the +seach+ method.

Instance Method Summary collapse

Instance Method Details

#sall?(arg = nil, &ruby_block) ⇒ Boolean

Tell if all the elements respect a given criterion given either as +arg+ or as block.

Returns:

  • (Boolean) 


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# File 'lib/HDLRuby/std/sequencer.rb', line 375

def sall?(arg = nil,&ruby_block)
    # Declare the result signal.
    res = nil
    HDLRuby::High.cur_system.open do
        res = bit.inner(HDLRuby.uniq_name(:"all_cond"))
    end
    # Initialize the result.
    res <= 1
    # Performs the computation.
    if arg then
        # Compare elements to arg.
        self.seach do |elem|
            res <= res & (elem == arg)
        end
    elsif ruby_block then
        # Use the ruby block.
        self.seach do |elem|
            res <= res & ruby_block.call(elem)
        end
    else
        raise "Ruby nil does not have any meaning in HW."
    end
    res
end

#sany?(arg = nil, &ruby_block) ⇒ Boolean

Tell if any of the elements respects a given criterion given either as +arg+ or as block.

Returns:

  • (Boolean) 


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# File 'lib/HDLRuby/std/sequencer.rb', line 402

def sany?(arg = nil,&ruby_block)
    # Declare the result signal.
    res = nil
    HDLRuby::High.cur_system.open do
        res = bit.inner(HDLRuby.uniq_name(:"any_cond"))
    end
    # Initialize the result.
    res <= 0
    # Performs the computation.
    if arg then
        # Compare elements to arg.
        self.seach do |elem|
            res <= res | (elem == arg)
        end
    elsif ruby_block then
        # Use the ruby block.
        self.seach do |elem|
            res <= res | ruby_block.call(elem)
        end
    else
        raise "Ruby nil does not have any meaning in HW."
    end
    res
end

#schain(arg) ⇒ Object

Returns an SEnumerator generated from current enumerable and +arg+



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# File 'lib/HDLRuby/std/sequencer.rb', line 428

def schain(arg)
    return self.seach + arg
end

#schunk(*args, &ruby_block) ⇒ Object

HW implementation of the Ruby chunk. NOTE: to do, or may be not.



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# File 'lib/HDLRuby/std/sequencer.rb', line 434

def schunk(*args,&ruby_block)
    raise "schunk is not supported yet."
end

#schunk_while(*args, &ruby_block) ⇒ Object

HW implementation of the Ruby chunk_while. NOTE: to do, or may be not.



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# File 'lib/HDLRuby/std/sequencer.rb', line 440

def schunk_while(*args,&ruby_block)
    raise "schunk_while is not supported yet."
end

#scompact ⇒ Object

HW implementation of the Ruby compact, but remove 0 values instead on nil (since nil that does not have any meaning in HW).



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# File 'lib/HDLRuby/std/sequencer.rb', line 478

def scompact
    # Generate the vector to put the result in.
    # The declares the resulting vector and index.
    res = nil
    idx = nil
    enum = self.seach
    HDLRuby::High.cur_system.open do
        res = enum.type[-enum.size].inner(HDLRuby.uniq_name(:"compact_vec"))
        idx = [enum.size.width].inner(HDLRuby.uniq_name(:"compact_idx"))
    end
    # And do the iteration.
    idx <= 0
    enum.seach do |elem|
        HDLRuby::High.top_user.hif(elem != 0) do
            res[idx] <= elem
            idx <= idx + 1
        end
    end
    SequencerT.current.swhile(idx < enum.size) do
        res[idx] <= 0
        idx <= idx + 1
    end
    # Return the resulting vector.
    return res
end

#scount(obj = nil, &ruby_block) ⇒ Object

WH implementation of the Ruby count.



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# File 'lib/HDLRuby/std/sequencer.rb', line 506

def scount(obj = nil, &ruby_block)
    # Generate the counter result signal.
    cnt = nil
    enum = self.seach
    HDLRuby::High.cur_system.open do
        cnt = [enum.size.width].inner(HDLRuby.uniq_name(:"count_idx"))
    end
    # Do the counting.
    cnt <= 0
    # Is obj present?
    if obj then
        # Yes, count the occurences of obj.
        enum.seach do |elem|
            HDLRuby::High.top_user.hif(obj == elem) { cnt <= cnt + 1 }
        end
    elsif ruby_block
        # No, but there is a ruby block, use its result for counting.
        enum.seach do |elem|
            HDLRuby::High.top_user.hif(ruby_block.call(elem)) do
                cnt <= cnt + 1
            end
        end
    else
        # No, the result is simply the number of elements.
        cnt <= enum.size
    end
    return cnt
end

#scycle(n = nil, &ruby_block) ⇒ Object

HW implementation of the Ruby cycle.



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# File 'lib/HDLRuby/std/sequencer.rb', line 536

def scycle(n = nil,&ruby_block)
    # No block given? Generate a new wrapper enumerator for scycle.
    if !ruby_block then
        return SEnumeratorWrapper.new(self,:scycle,n)
    end
    this = self
    # Is n nil?
    if n == nil then
        # Yes, infinite loop.
        SequencerT.current.sloop do
            this.seach(&ruby_block)
        end
    else
        # Finite loop.
        (0..(n-1)).seach do
            this.seach(&ruby_block)
        end
    end
end

#sdrop(n) ⇒ Object

HW implementation of the Ruby drop.



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# File 'lib/HDLRuby/std/sequencer.rb', line 594

def sdrop(n)
    # Generate the vector to put the result in.
    # The declares the resulting vector and index.
    res = nil
    idx = nil
    enum = self.seach
    HDLRuby::High.cur_system.open do
        # res = enum.type[-enum.size].inner(HDLRuby.uniq_name(:"drop_vec"))
        res = enum.type[-enum.size+n].inner(HDLRuby.uniq_name(:"drop_vec"))
        # idx = [enum.size.width].inner(HDLRuby.uniq_name(:"drop_idx"))
    end
    # And do the iteration.
    # idx <= 0
    # enum.seach.with_index do |elem,i|
    #     HDLRuby::High.top_user.hif(i >= n) do
    #         res[idx] <= elem
    #         idx <= idx + 1
    #     end
    # end
    # SequencerT.current.swhile(idx < enum.size) do
    #     res[idx] <= 0
    #     idx <= idx + 1
    # end
    (enum.size-n).stimes do |i|
        res[i] <= enum.access(i+n)
    end
    # Return the resulting vector.
    return res
end

#sdrop_while(&ruby_block) ⇒ Object

HW implementation of the Ruby drop_while.



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# File 'lib/HDLRuby/std/sequencer.rb', line 625

def sdrop_while(&ruby_block)
    # No block given? Generate a new wrapper enumerator for sdrop_while.
    if !ruby_block then
        return SEnumeratorWrapper.new(self,:sdrop_while)
    end
    # A block is given.
    # Generate the vector to put the result in.
    # The declares the resulting vector, index and drop flag.
    res = nil
    idx = nil
    flg = nil
    enum = self.seach
    HDLRuby::High.cur_system.open do
        res = enum.type[-enum.size].inner(HDLRuby.uniq_name(:"drop_vec"))
        idx = [enum.size.width].inner(HDLRuby.uniq_name(:"drop_idx"))
        flg = bit.inner(HDLRuby.uniq_name(:"drop_flg"))
    end
    # And do the iteration.
    # First drop and fill from current enumerable elements.
    idx <= 0
    flg <= 1
    enum.seach.with_index do |elem,i|
        HDLRuby::High.top_user.hif(flg == 1) do
            HDLRuby::High.top_user.hif(ruby_block.call(elem) == 0) do
                flg <= 0
            end
        end
        HDLRuby::High.top_user.hif(flg == 0) do
            res[idx] <= elem
            idx <= idx + 1
        end
    end
    # Finally, end with zeros.
    SequencerT.current.swhile(idx < enum.size) do
        res[idx] <= 0
        idx <= idx + 1
    end
    # Return the resulting vector.
    return res
end

#seach_cons(n, &ruby_block) ⇒ Object

HW implementation of the Ruby each_cons



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# File 'lib/HDLRuby/std/sequencer.rb', line 667

def seach_cons(n,&ruby_block)
    # No block given? Generate a new wrapper enumerator for seach_cons.
    if !ruby_block then
        return SEnumeratorWrapper.new(self,:seach_cons)
    end
    # A block is given.
    # Declares the indexes and the buffer for cosecutive elements.
    enum = self.seach
    idx  = nil
    buf  = nil
    HDLRuby::High.cur_system.open do
        idx = [enum.size.width].inner(HDLRuby.uniq_name(:"each_cons_idx"))
        buf = n.times.map do |i|
            [enum.type].inner(HDLRuby.uniq_name(:"each_cons_buf#{i}"))
        end
    end
    # And do the iteration.
    this = self
    # Initialize the buffer.
    n.times do |i|
        buf[i] <= enum.access(i)
        SequencerT.current.step
    end
    # Do the first iteration.
    ruby_block.call(*buf)
    # Do the remaining iteration.
    idx <= n
    SequencerT.current.swhile(idx < enum.size) do
        # Shifts the buffer (in parallel)
        buf.each_cons(2) { |a0,a1| a0 <= a1 }
        # Adds the new element.
        buf[-1] <= enum.access(idx)
        idx <= idx + 1
        # Executes the block.
        ruby_block.call(*buf)
    end
end

#seach_entry(*args, &ruby_block) ⇒ Object

HW implementation of the Ruby each_entry. NOTE: to do, or may be not.



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# File 'lib/HDLRuby/std/sequencer.rb', line 707

def seach_entry(*args,&ruby_block)
    raise "seach_entry is not supported yet."
end

#seach_nexts(num, &ruby_block) ⇒ Object

Iterator on the +num+ next elements. NOTE:

  • Stop iteration when the end of the range is reached or when there are no elements left
  • This is not a method from Ruby but one specific for hardware where creating a array is very expensive.


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# File 'lib/HDLRuby/std/sequencer.rb', line 1680

def seach_nexts(num,&ruby_block)
    # # No block given, returns a new enumerator.
    # unless ruby_block then
    #     res = SEnumeratorWrapper.new(self,:seach_nexts,num)
    #     res.size = num
    #     return res
    # end
    # # A block is given, iterate.
    # enum = self.seach
    # # Create a counter. 
    # count = nil
    # zero = nil
    # one = nil
    # HDLRuby::High.cur_system.open do
    #     if num.respond_to?(:width) then
    #         count = [num.width].inner(HDLRuby.uniq_name(:"snexts_count"))
    #     else
    #         count = num.to_expr.type.inner(HDLRuby.uniq_name(:"snexts_count"))
    #     end
    #     zero = _b0
    #     one  = _b1
    # end
    # count <= num
    # SequencerT.current.swhile(count > zero) do
    #     ruby_block.call(enum.snext)
    #     count <= count - one
    # end
    zero = nil
    one = nil
    HDLRuby::High.cur_system.open do
        zero = _b0.as(num.to_expr.type)
        one = _b1.as(num.to_expr.type)
    end
    subE = SEnumeratorSub.new(self,zero..num-one)
    if ruby_block then
        # A block is given, iterate immediatly.
        subE.seach(&ruby_block)
    else
        # No block given, return the new sub iterator.
        return subE
    end
end

#seach_range(rng, &ruby_block) ⇒ Object

Iterator on each of the elements in range +rng+. NOTE:

  • Stop iteration when the end of the range is reached or when there are no elements left
  • This is not a method from Ruby but one specific for hardware where creating a array is very expensive.


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# File 'lib/HDLRuby/std/sequencer.rb', line 369

def seach_range(rng,&ruby_block)
    return self.seach.seach_range(rng,&ruby_block)
end

#seach_slice(n, &ruby_block) ⇒ Object

HW implementation of the Ruby each_slice



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# File 'lib/HDLRuby/std/sequencer.rb', line 712

def seach_slice(n,&ruby_block)
    # No block given? Generate a new wrapper enumerator for seach_slice.
    if !ruby_block then
        return SEnumeratorWrapper.new(self,:seach_slice)
    end
    # A block is given.
    # Declares the indexes and the buffer for consecutive elements.
    enum = self.seach
    idx  = nil
    buf  = nil
    HDLRuby::High.cur_system.open do
        idx = [(enum.size+n).width].inner(HDLRuby.uniq_name(:"each_slice_idx"))
        buf = n.times.map do |i|
            [enum.type].inner(HDLRuby.uniq_name(:"each_slice_buf#{i}"))
        end
    end
    # And do the iteration.
    this = self
    # Adjust n if too large.
    n = enum.size if n > enum.size
    # Initialize the buffer.
    n.times do |i|
        buf[i] <= enum.access(i)
        SequencerT.current.step
    end
    # Do the first iteration.
    ruby_block.call(*buf)
    # Do the remaining iteration.
    idx <= n
    SequencerT.current.swhile(idx < enum.size) do
        # Gets the new element.
        n.times do |i|
            sif(idx+i < enum.size) do
                buf[i] <= enum.access(idx+i)
            end
            selse do
                buf[i] <= 0
            end
        end
        idx <= idx + n
        # Executes the block.
        ruby_block.call(*buf)
    end
end

#seach_with_index(*args, &ruby_block) ⇒ Object

HW implementation of the Ruby each_with_index.



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# File 'lib/HDLRuby/std/sequencer.rb', line 758

def seach_with_index(*args,&ruby_block)
    self.seach.with_index(*args,&ruby_block)
end

#seach_with_object(obj, &ruby_block) ⇒ Object

HW implementation of the Ruby each_with_object.



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# File 'lib/HDLRuby/std/sequencer.rb', line 763

def seach_with_object(obj,&ruby_block)
    self.seach.with_object(obj,&ruby_block)
end

#sfind(if_none_proc, &ruby_block) ⇒ Object

HW implementation of the Ruby find. NOTE: contrary to Ruby, if_none_proc is mandatory since there is no nil in HW. Moreover, the argument can also be a value.



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# File 'lib/HDLRuby/std/sequencer.rb', line 559

def sfind(if_none_proc, &ruby_block)
    # No block given? Generate a new wrapper enumerator for sfind.
    if !ruby_block then
        return SEnumeratorWrapper.new(self,:sfind,if_none_proc)
    end
    # Generate the found result signal and flag signals.
    found = nil
    flag = nil
    enum = self.seach
    HDLRuby::High.cur_system.open do
        found = enum.type.inner(HDLRuby.uniq_name(:"find_found"))
        flag = bit.inner(HDLRuby.uniq_name(:"find_flag"))
    end
    # Look for the element.
    flag <= 0
    enum.srewind
    SequencerT.current.swhile((flag == 0) & (enum.snext?)) do
        found <= enum.snext
        hif(ruby_block.call(found)) do
            # Found, save the element and raise the flag.
            flag <= 1
        end
    end
    HDLRuby::High.top_user.hif(~flag) do
        # Not found, execute the none block.
        if if_none_proc.respond_to?(:call) then
            found <= f_none_proc.call
        else
            found <= if_none_proc
        end
    end
    found
end

#sfind_index(obj = nil, &ruby_block) ⇒ Object

HW implementation of the Ruby find_index.



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# File 'lib/HDLRuby/std/sequencer.rb', line 819

def sfind_index(obj = nil, &ruby_block)
    # No block given nor obj? Generate a new wrapper enumerator for
    # sfind.
    if !ruby_block && !obj then
        return SEnumeratorWrapper.new(self,:sfind,if_none_proc)
    end
    # Generate the index result signal and flag signals.
    idx  = nil
    flag = nil
    enum = self.seach
    HDLRuby::High.cur_system.open do
        idx = signed[enum.size.width+1].inner(HDLRuby.uniq_name(:"find_idx"))
        flag = bit.inner(HDLRuby.uniq_name(:"find_flag"))
    end
    # Look for the element.
    flag <= 0
    idx <= 0
    enum.srewind
    SequencerT.current.swhile((flag == 0) & (enum.snext?)) do
        if (obj) then
            # There is obj case.
            HDLRuby::High.top_user.hif(enum.snext == obj) do
                # Found, save the element and raise the flag.
                flag <= 1
            end
        else
            # There is a block case.
            HDLRuby::High.top_user.hif(ruby_block.call(enum.snext)) do
                # Found, save the element and raise the flag.
                flag <= 1
            end
        end
        HDLRuby::High.top_user.helse do
            idx <= idx + 1
        end
    end
    HDLRuby::High.top_user.hif(flag ==0) { idx <= -1 }
    return idx
end

#sfirst(n = 1) ⇒ Object

HW implementation of the Ruby first.



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# File 'lib/HDLRuby/std/sequencer.rb', line 860

def sfirst(n=1)
    # Generate the vector to put the result in.
    # The declares the resulting vector and index.
    res = nil
    enum = self.seach
    HDLRuby::High.cur_system.open do
        res = enum.type[-n].inner(HDLRuby.uniq_name(:"first_vec"))
    end
    # And do the iteration.
    n.stimes do |i|
        res[i] <= enum.access(i)
    end
    # Return the resulting vector.
    return res
end

#sflat_map(&ruby_block) ⇒ Object

HW implementation of the Ruby flat_map. NOTE: actually due to the way HDLRuby handles vectors, should work like smap



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# File 'lib/HDLRuby/std/sequencer.rb', line 472

def sflat_map(&ruby_block)
    return smap(&ruby_block)
end

#sgrep(*args, &ruby_block) ⇒ Object

HW implementation of the Ruby grep. NOTE: to do, or may be not.



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# File 'lib/HDLRuby/std/sequencer.rb', line 878

def sgrep(*args,&ruby_block)
    raise "sgrep is not supported yet."
end

#sgrep_v(*args, &ruby_block) ⇒ Object

HW implementation of the Ruby grep_v. NOTE: to do, or may be not.



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# File 'lib/HDLRuby/std/sequencer.rb', line 884

def sgrep_v(*args,&ruby_block)
    raise "sgrep_v is not supported yet."
end

#sgroup_by(*args, &ruby_block) ⇒ Object

HW implementation of the Ruby group_by. NOTE: to do, or may be not.



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# File 'lib/HDLRuby/std/sequencer.rb', line 890

def sgroup_by(*args,&ruby_block)
    raise "sgroup_by is not supported yet."
end

#sinclude?(obj) ⇒ Boolean

HW implementation of the Ruby include?

Returns:

  • (Boolean) 


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# File 'lib/HDLRuby/std/sequencer.rb', line 895

def sinclude?(obj)
    # Generate the result signal.
    res  = nil
    enum = self.seach
    HDLRuby::High.cur_system.open do
        res = bit.inner(HDLRuby.uniq_name(:"include_res"))
    end
    # Look for the element.
    res <= 0
    enum.srewind
    SequencerT.current.swhile((res == 0) & (enum.snext?)) do
        # There is obj case.
        HDLRuby::High.top_user.hif(enum.snext == obj) do
            # Found, save the element and raise the flag.
            res <= 1
        end
    end
    return res
end

#sinject(*args, &ruby_block) ⇒ Object Also known as: sreduce

HW implementation of the Ruby inject.



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# File 'lib/HDLRuby/std/sequencer.rb', line 916

def sinject(*args,&ruby_block)
    init = nil
    symbol = nil
    # Process the arguments.
    if args.size > 2 then
        raise ArgumentError.new("wrong number of arguments (given #{args.size} expected 0..2)")
    elsif args.size == 2 then
        # Initial value and symbol given case.
        init, symbol = args
    elsif args.size == 1 && ruby_block then
        # Initial value and block given case.
        init = args[0]
    elsif args.size == 1 then
        # Symbol given case.
        symbol = args[0]
    end
    enum = self.seach
    # Define the computation type: from the initial value if any,
    # otherwise from the enum.
    typ = init ? init.to_expr.type : enum.type
    # Generate the result signal.
    res  = nil
    HDLRuby::High.cur_system.open do
        res = typ.inner(HDLRuby.uniq_name(:"inject_res"))
    end
    # Start the initialization
    enum.srewind
    # Is there an initial value?
    if (init) then
        # Yes, start with it.
        res <= init
    else
        # No, start with the first element of the enumerator.
        res <= 0
        SequencerT.current.sif(!enum.snext?) { res <= enum.snext }
    end
    SequencerT.current.swhile(enum.snext?) do
        # Do the accumulation.
        if (symbol) then
            res <= res.send(symbol,enum.snext)
        else
            res <= ruby_block.call(res,enum.snext)
        end
    end
    return res
end

#slazy(*args, &ruby_block) ⇒ Object

HW implementation of the Ruby lazy. NOTE: to do, or may be not.



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# File 'lib/HDLRuby/std/sequencer.rb', line 967

def slazy(*args,&ruby_block)
    raise "slazy is not supported yet."
end

#smap(&ruby_block) ⇒ Object

Returns a vector containing the execution result of the given block on each element. If no block is given, return an SEnumerator. NOTE: be carful that the resulting vector can become huge if there are many element.



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# File 'lib/HDLRuby/std/sequencer.rb', line 448

def smap(&ruby_block)
    # No block given? Generate a new wrapper enumerator for smap.
    if !ruby_block then
        return SEnumeratorWrapper.new(self,:smap)
    end
    # A block given? Fill the vector it with the computation result.
    # Generate the vector to put the result in.
    # The declares the resulting vector.
    res = nil
    enum = self.seach
    HDLRuby::High.cur_system.open do
        res = enum.type[-enum.size].inner(HDLRuby.uniq_name(:"map_vec"))
    end
    # And do the iteration.
    enum.with_index do |elem,idx|
        res[idx] <= ruby_block.call(elem)
    end
    # Return the resulting vector.
    return res
end

#smax(n = nil, &ruby_block) ⇒ Object

HW implementation of the Ruby max.



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# File 'lib/HDLRuby/std/sequencer.rb', line 972

def smax(n = nil, &ruby_block)
    # Process the arguments.
    n = 1 unless n
    enum = self.seach
    # Declare the result signal the flag and the result array size index
    # used for implementing the algorithm (shift-based sorting) in
    # case of multiple max.
    res  = nil
    flg = nil
    idx = nil
    HDLRuby::High.cur_system.open do
        if n == 1 then
            res = enum.type.inner(HDLRuby.uniq_name(:"max_res"))
            # No flg nor idx!
        else
            res = enum.type[-n].inner(HDLRuby.uniq_name(:"max_res"))
            flg = bit.inner(HDLRuby.uniq_name(:"max_flg"))
            idx = bit[n.width].inner(HDLRuby.uniq_name(:"max_idx"))
        end
    end
    enum.srewind
    if n == 1 then
        # Single max case, initialize res with the first element(s)
        res <= enum.type.min
        SequencerT.current.sif(enum.snext?) { res <= enum.snext }
    else
        # Multiple max case, initialize the resulting array size index.
        idx <= 0
    end
    # Do the iteration.
    SequencerT.current.swhile(enum.snext?) do
        if n == 1 then
            # Single max case.
            elem = enum.snext
            if ruby_block then
                hif(ruby_block.call(res,elem) < 0) { res <= elem }
            else
                hif(res < elem) { res <= elem }
            end
        else
            # Multiple max case.
            SequencerT.current.sif(enum.snext?) do
                elem = enum.snext
                flg <= 1
                n.times do |i|
                    # Compute the comparison between the result element
                    # at i and the enum element.
                    if ruby_block then
                        cond = ruby_block.call(res[i],elem) < 0
                    else
                        cond = res[i] < elem
                    end
                    # If flg is 0, elem is already set as max, skip.
                    # If the result array size index is equal to i, then
                    # put the element whatever the comparison is since
                    # the place is still empty.
                    hif(flg & (cond | (idx == i))) do
                        # A new max is found, shift res from i.
                        ((i+1)..(n-1)).reverse_each { |j| res[j] <= res[j-1] }
                        # An set the new max in current position.
                        res[i] <= elem
                        # For now skip.
                        flg <= 0
                    end
                end
                # Note: when idx >= n, the resulting array is full
                hif(idx < n) { idx <= idx + 1 }
            end
        end
    end
    return res
end

#smax_by(n = nil, &ruby_block) ⇒ Object

HW implementation of the Ruby max_by.



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# File 'lib/HDLRuby/std/sequencer.rb', line 1046

def smax_by(n = nil, &ruby_block)
    # No block given? Generate a new wrapper enumerator for smax_by.
    if !ruby_block then
        return SEnumeratorWrapper.new(self,:smax_by,n)
    end
    # A block is given, use smax with a proc that applies ruby_block
    # before comparing.
    return smax(n) { |a,b| ruby_block.call(a) <=> ruby_block.call(b) }
end

#smin(n = nil, &ruby_block) ⇒ Object

HW implementation of the Ruby min.



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# File 'lib/HDLRuby/std/sequencer.rb', line 1057

def smin(n = nil, &ruby_block)
    # Process the arguments.
    n = 1 unless n
    enum = self.seach
    # Declare the result signal the flag and the result array size index
    # used for implementing the algorithm (shift-based sorting) in
    # case of multiple min.
    res  = nil
    flg = nil
    idx = nil
    HDLRuby::High.cur_system.open do
        if n == 1 then
            res = enum.type.inner(HDLRuby.uniq_name(:"min_res"))
            # No flg nor idx!
        else
            res = enum.type[-n].inner(HDLRuby.uniq_name(:"min_res"))
            flg = bit.inner(HDLRuby.uniq_name(:"min_flg"))
            idx = bit[n.width].inner(HDLRuby.uniq_name(:"min_idx"))
        end
    end
    enum.srewind
    if n == 1 then
        # Single min case, initialize res with the first element(s)
        res <= enum.type.max
        SequencerT.current.sif(enum.snext?) { res <= enum.snext }
    else
        # Multiple min case, initialize the resulting array size index.
        idx <= 0
    end
    # Do the iteration.
    SequencerT.current.swhile(enum.snext?) do
        if n == 1 then
            # Single min case.
            elem = enum.snext
            if ruby_block then
                hif(ruby_block.call(res,elem) > 0) { res <= elem }
            else
                hif(res > elem) { res <= elem }
            end
        else
            # Multiple min case.
            SequencerT.current.sif(enum.snext?) do
                elem = enum.snext
                flg <= 1
                n.times do |i|
                    # Compute the comparison between the result element
                    # at i and the enum element.
                    if ruby_block then
                        cond = ruby_block.call(res[i],elem) > 0
                    else
                        cond = res[i] > elem
                    end
                    # If flg is 0, elem is already set as min, skip.
                    # If the result array size index is equal to i, then
                    # put the element whatever the comparison is since
                    # the place is still empty.
                    hif(flg & (cond | (idx == i))) do
                        # A new min is found, shift res from i.
                        ((i+1)..(n-1)).reverse_each { |j| res[j] <= res[j-1] }
                        # An set the new min in current position.
                        res[i] <= elem
                        # For now skip.
                        flg <= 0
                    end
                end
                # Note: when idx >= n, the resulting array is full
                hif(idx < n) { idx <= idx + 1 }
            end
        end
    end
    return res
end

#smin_by(n = nil, &ruby_block) ⇒ Object

HW implementation of the Ruby min_by.



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# File 'lib/HDLRuby/std/sequencer.rb', line 1131

def smin_by(n = nil, &ruby_block)
    # No block given? Generate a new wrapper enumerator for smin_by.
    if !ruby_block then
        return SEnumeratorWrapper.new(self,:smin_by,n)
    end
    # A block is given, use smin with a proc that applies ruby_block
    # before comparing.
    return smin(n) { |a,b| ruby_block.call(a) <=> ruby_block.call(b) }
end

#sminmax(&ruby_block) ⇒ Object

HW implementation of the Ruby minmax.



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# File 'lib/HDLRuby/std/sequencer.rb', line 1142

def sminmax(&ruby_block)
    # Generate the result signal.
    res  = nil
    enum = self.seach
    HDLRuby::High.cur_system.open do
        res = enum.type[2].inner(HDLRuby.uniq_name(:"minmax_res"))
    end
    # Computes the min.
    res[0] <= enum.smin(&ruby_block)
    # Computes the max.
    res[1] <= enum.smax(&ruby_block)
    # Return the result.
    return res
end

#sminmax_by(&ruby_block) ⇒ Object

HW implementation of the Ruby minmax_by.



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# File 'lib/HDLRuby/std/sequencer.rb', line 1158

def sminmax_by(&ruby_block)
    # Generate the result signal.
    res  = nil
    enum = self.seach
    HDLRuby::High.cur_system.open do
        res = enum.type[2].inner(HDLRuby.uniq_name(:"minmax_res"))
    end
    # Computes the min.
    res[0] <= enum.smin_by(&ruby_block)
    # Computes the max.
    res[1] <= enum.smax_by(&ruby_block)
    # Return the result.
    return res
end

#snone?(arg = nil, &ruby_block) ⇒ Boolean

Tell if none of the elements respects a given criterion given either as +arg+ or as block.

Returns:

  • (Boolean) 


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# File 'lib/HDLRuby/std/sequencer.rb', line 1175

def snone?(arg = nil,&ruby_block)
    # Declare the result signal.
    res = nil
    HDLRuby::High.cur_system.open do
        res = bit.inner(HDLRuby.uniq_name(:"none_cond"))
    end
    # Initialize the result.
    res <= 1
    # Performs the computation.
    if arg then
        # Compare elements to arg.
        self.seach do |elem|
            res <= res & (elem != arg)
        end
    elsif ruby_block then
        # Use the ruby block.
        self.seach do |elem|
            res <= res & ~ruby_block.call(elem)
        end
    else
        raise "Ruby nil does not have any meaning in HW."
    end
    res
end

#sone?(arg = nil, &ruby_block) ⇒ Boolean

Tell if one and only one of the elements respects a given criterion given either as +arg+ or as block.

Returns:

  • (Boolean) 


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# File 'lib/HDLRuby/std/sequencer.rb', line 1202

def sone?(arg = nil,&ruby_block)
    # Declare the result signal.
    res = nil
    HDLRuby::High.cur_system.open do
        res = bit.inner(HDLRuby.uniq_name(:"one_cond"))
    end
    # Initialize the result.
    res <= 0
    # Performs the computation.
    if arg then
        # Compare elements to arg.
        self.seach do |elem|
            res <= res ^ (elem == arg)
        end
    elsif ruby_block then
        # Use the ruby block.
        self.seach do |elem|
            res <= res ^ ruby_block.call(elem)
        end
    else
        raise "Ruby nil does not have any meaning in HW."
    end
    res
end

#spartition(*args, &ruby_block) ⇒ Object

HW implementation of the Ruby partition. NOTE: to do, or may be not.



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# File 'lib/HDLRuby/std/sequencer.rb', line 1229

def spartition(*args,&ruby_block)
    raise "spartition is not supported yet."
end

#sreject(&ruby_block) ⇒ Object

HW implementatiob of the Ruby reject.



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# File 'lib/HDLRuby/std/sequencer.rb', line 1234

def sreject(&ruby_block)
    return sselect {|elem| ~ruby_block.call(elem) }
end

#sreverse_each(*args, &ruby_block) ⇒ Object

HW implementatiob of the Ruby reverse_each.



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# File 'lib/HDLRuby/std/sequencer.rb', line 1239

def sreverse_each(*args,&ruby_block)
    # No block given? Generate a new wrapper enumerator for 
    # sreverse_each.
    if !ruby_block then
        return SEnumeratorWrapper.new(self,:sreverse_each,*args)
    end
    # A block is given.
    # Declares the index.
    enum = self.seach
    idx = nil
    HDLRuby::High.cur_system.open do
        idx = bit[enum.size.width].inner(HDLRuby.uniq_name(:"reverse_idx"))
    end
    # Do the iteration.
    idx <= enum.size
    SequencerT.current.swhile(idx > 0) do
        idx <= idx - 1
        ruby_block.call(*args,enum.access(idx))
    end
end

#sselect(&ruby_block) ⇒ Object

HW implementation of the Ruby select.



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# File 'lib/HDLRuby/std/sequencer.rb', line 785

def sselect(&ruby_block)
    # No block given? Generate a new wrapper enumerator for sselect.
    if !ruby_block then
        return SEnumeratorWrapper.new(self,:sselect)
    end
    # A block is given.
    # Generate the vector to put the result in.
    # The declares the resulting vector and index.
    res = nil
    idx = nil
    enum = self.seach
    HDLRuby::High.cur_system.open do
        res = enum.type[-enum.size].inner(HDLRuby.uniq_name(:"select_vec"))
        idx = [enum.size.width].inner(HDLRuby.uniq_name(:"select_idx"))
    end
    # And do the iteration.
    # First select and fill from current enumerable elements.
    idx <= 0
    enum.seach do |elem|
        HDLRuby::High.top_user.hif(ruby_block.call(elem) == 1) do
            res[idx] <= elem
            idx <= idx + 1
        end
    end
    # Finally, end with zeros.
    SequencerT.current.swhile(idx < enum.size) do
        res[idx] <= 0
        idx <= idx + 1
    end
    # Return the resulting vector.
    return res
end

#sslice_after(pattern = nil, &ruby_block) ⇒ Object

HW implementation of the Ruby slice_after. NOTE: to do, or may be not.



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# File 'lib/HDLRuby/std/sequencer.rb', line 1262

def sslice_after(pattern = nil,&ruby_block)
    raise "sslice_after is not supported yet."
end

#sslice_before(*args, &ruby_block) ⇒ Object

HW implementation of the Ruby slice_before. NOTE: to do, or may be not.



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# File 'lib/HDLRuby/std/sequencer.rb', line 1268

def sslice_before(*args,&ruby_block)
    raise "sslice_before is not supported yet."
end

#sslice_when(*args, &ruby_block) ⇒ Object

HW implementation of the Ruby slice_when. NOTE: to do, or may be not.



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# File 'lib/HDLRuby/std/sequencer.rb', line 1274

def sslice_when(*args,&ruby_block)
    raise "sslice_before is not supported yet."
end

#ssort(&ruby_block) ⇒ Object

HW implementation of the Ruby sort.



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# File 'lib/HDLRuby/std/sequencer.rb', line 1373

def ssort(&ruby_block)
    enum = self.seach
    n = enum.size
    # Declare the result signal.
    res = nil
    flg = nil
    siz = nil
    HDLRuby::High.cur_system.open do
        res = enum.type[-n].inner(HDLRuby.uniq_name(:"sort_res"))
    end
    # Only one element?
    if n == 1 then
        # Just copy to the result and end here.
        res[0] <= enum.snext
        return res
    end
    tmp = []
    idxF = nil; idxM = nil; idxO = nil
    HDLRuby::High.cur_system.open do
        # More elements, need to declare intermediate arrays.
        ((n-1).width).times do
            tmp << enum.type[-n].inner(HDLRuby.uniq_name(:"sort_tmp"))
        end
        # The result will be the last of the intermediate arrays.
        tmp << res
    end
    # Fills the first temporary array.
    enum.seach_with_index { |e,i| tmp[0][i] <= e }
    # Is there only 2 elements?
    if n == 2 then
        if ruby_block then
            cond = ruby_block.call(tmp[0][0],tmp[0][1]) < 0
        else
            cond = tmp[0][0] < tmp[0][1]
        end
        # Just look for the min and the max.
        hif(cond) do
            res[0] <= tmp[0][0]
            res[1] <= tmp[0][1]
        end
        helse do
            res[1] <= tmp[0][0]
            res[0] <= tmp[0][1]
        end
        return res
    end
    # Performs the sort using a merge-based algorithm.
    breadth = 1; i = 0
    # while(breadth*2 < n)
    while(breadth < n)
        pos = 0; last = 0
        while(pos+breadth < n)
            last = [n-1,pos+breadth*2-1].min
            ssort_merge(tmp[i], tmp[i+1], pos, pos+breadth,last,&ruby_block)
            pos = pos + breadth * 2
        end
        # Copy the remaining elements if any
        # puts "n=#{n} breadth=#{breadth} last=#{last} n-last-1=#{n-last-1}"
        if last < n-1 then
            (n-last-1).stimes do |j|
                tmp[i+1][last+1+j] <= tmp[i][last+1+j]
            end
        end
        # Next step
        # SequencerT.current.step
        breadth = breadth * 2
        i += 1
    end
    # # Last merge if the array size was not a power of 2.
    # if (breadth*2 != n) then
    #     ssort_merge(tmp[-2],tmp[-1],0,breadth,n-1,&ruby_block)
    #     # SequencerT.current.step
    # end
    return res
end

#ssort_by(&ruby_block) ⇒ Object

HW implementation of the Ruby sort.



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# File 'lib/HDLRuby/std/sequencer.rb', line 1450

def ssort_by(&ruby_block)
    # No block given? Generate a new wrapper enumerator for smin_by.
    if !ruby_block then
        return SEnumeratorWrapper.new(self,:ssort_by,n)
    end
    # A block is given, use smin with a proc that applies ruby_block
    # before comparing.
    return ssort { |a,b| ruby_block.call(a) <=> ruby_block.call(b) }
end

#ssort_merge(arI, arO, first, middle, last, &ruby_block) ⇒ Object

Merge two arrays in order, for ssort only.



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# File 'lib/HDLRuby/std/sequencer.rb', line 1330

def ssort_merge(arI, arO, first, middle, last, &ruby_block)
    # puts "first=#{first} middle=#{middle} last=#{last}"
    # Declare and initialize the indexes and
    # the ending flag.
    idF = nil; idM = nil; idO = nil
    flg = nil
    HDLRuby::High.cur_system.open do
        typ = [(last+1).width]
        idF = typ.inner(HDLRuby.uniq_name(:"sort_idF"))
        idM = typ.inner(HDLRuby.uniq_name(:"sort_idM"))
        idO = typ.inner(HDLRuby.uniq_name(:"sort_idO"))
        flg = inner(HDLRuby.uniq_name(:"sort_flg"))
    end
    idF <= first; idM <= middle; idO <= first
    flg <= 0
    SequencerT.current.swhile((flg == 0) & (idO < middle*2)) do
        if ruby_block then
            cond = ruby_block.call(arI[idF],arI[idM]) < 0
        else
            cond = arI[idF] < arI[idM]
        end
        hif((idF >= middle) & (idM > last)) { flg <= 1 }
        helsif (idF >= middle) do
            arO[idO] <= arI[idM]
            idM <= idM + 1
        end
        helsif(idM > last) do
            arO[idO] <= arI[idF]
            idF <= idF + 1
        end
        helsif(cond) do
            arO[idO] <= arI[idF]
            idF <= idF + 1
        end
        helse do
            arO[idO] <= arI[idM]
            idM <= idM + 1
        end
        idO <= idO + 1
    end
end

#ssum(initial_value = nil, &ruby_block) ⇒ Object

HW implementation of the Ruby sum.



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# File 'lib/HDLRuby/std/sequencer.rb', line 1461

def ssum(initial_value = nil,&ruby_block)
    enum = self.seach
    # Define the computation type: from the initial value if any,
    # otherwise from the enum.
    typ = initial_value ? initial_value.to_expr.type : enum.type
    # Ensures there is an initial value.
    initial_value = 0.to_expr.as(typ) unless initial_value
    # Generate the result signal.
    res  = nil
    HDLRuby::High.cur_system.open do
        res = typ.inner(HDLRuby.uniq_name(:"sum_res"))
    end
    # Start the initialization
    enum.srewind
    # Yes, start with the initial value.
    res <= initial_value
    SequencerT.current.swhile(enum.snext?) do
        # Do the accumulation.
        if (ruby_block) then
            # There is a ruby block, use it to process the element first.
            res <= res + ruby_block.call(enum.snext)
        else
            # No ruby block, just do the sum
            res <= res + enum.snext
        end
    end
    return res
end

#stake(n) ⇒ Object

The HW implementation of the Ruby take.



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# File 'lib/HDLRuby/std/sequencer.rb', line 1491

def stake(n)
    enum = self.seach
    # Generate the result signal.
    res  = nil
    HDLRuby::High.cur_system.open do
        res = enum.type[-n].inner(HDLRuby.uniq_name(:"sum_res"))
    end
    # Take the n first elements.
    n.stimes do |i|
        res[i] <= enum.access(i)
    end
    return res
end

#stake_while(&ruby_block) ⇒ Object

The HW implementation of the Ruby take_while.



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# File 'lib/HDLRuby/std/sequencer.rb', line 1506

def stake_while(&ruby_block)
    # No block given? Generate a new wrapper enumerator for sdrop_while.
    if !ruby_block then
        return SEnumeratorWrapper.new(self,:stake_while)
    end
    # A block is given.
    # Generate the vector to put the result in.
    # The declares the resulting vector and take flag.
    res = nil
    flg = nil
    enum = self.seach
    HDLRuby::High.cur_system.open do
        res = enum.type[-enum.size].inner(HDLRuby.uniq_name(:"take_vec"))
        flg = bit.inner(HDLRuby.uniq_name(:"take_flg"))
    end
    # And do the iteration.
    # First fill from current enumerable elements.
    flg <= 1
    enum.seach.with_index do |elem,i|
        HDLRuby::High.top_user.hif(flg == 1) do
            HDLRuby::High.top_user.hif(ruby_block.call(elem) == 0) do
                flg <= 0
            end
        end
        HDLRuby::High.top_user.hif(flg == 1) do
            res[i] <= elem
        end
        HDLRuby::High.top_user.helse do
            res[i] <= 0
        end
    end
    # Return the resulting vector.
    return res
end

#stally(h = nil) ⇒ Object

HW implementation of the Ruby tally. NOTE: to do, or may be not.



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# File 'lib/HDLRuby/std/sequencer.rb', line 1543

def stally(h = nil)
    raise "stally is not supported yet."
end

#sto_a ⇒ Object

HW implementation of the Ruby to_a.



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# File 'lib/HDLRuby/std/sequencer.rb', line 768

def sto_a
    # Declares the resulting vector.
    enum = self.seach
    res  = nil
    # size = enum.size.to_value
    HDLRuby::High.cur_system.open do
        # res = enum.type[-enum.size].inner(HDLRuby.uniq_name(:"to_a_res"))
        res = enum.type[-enum.size.to_i].inner(HDLRuby.uniq_name(:"to_a_res"))
    end
    # Fills it.
    self.seach_with_index do |elem,i|
        res[i] <= elem
    end
    return res
end

#sto_h(h = nil) ⇒ Object

HW implementation of the Ruby to_h. NOTE: to do, or may be not.



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# File 'lib/HDLRuby/std/sequencer.rb', line 1549

def sto_h(h = nil)
    raise "sto_h is not supported yet."
end

#suniq(&ruby_block) ⇒ Object

HW implementation of the Ruby uniq.



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# File 'lib/HDLRuby/std/sequencer.rb', line 1554

def suniq(&ruby_block)
    enum = self.seach
    n = enum.size
    # Declare the result signal the flag and the result array size index
    # used for implementing the algorithm (shift-based sorting).
    res = nil
    flg = nil
    idx = nil
    HDLRuby::High.cur_system.open do
        res = enum.type[-n].inner(HDLRuby.uniq_name(:"suniq_res"))
        flg = bit.inner(HDLRuby.uniq_name(:"suniq_flg"))
        idx = bit[n.width].inner(HDLRuby.uniq_name(:"suniq_idx"))
    end
    enum.srewind
    # Do the iteration.
    idx <= 0
    SequencerT.current.swhile(enum.snext?) do
        # Multiple min case.
        SequencerT.current.sif(enum.snext?) do
            elem = enum.snext
            flg <= 1
            n.times do |i|
                # Compute the comparison between the result element at i
                # and the enum element.
                hif(i < idx) do
                    if ruby_block then
                        flg <= (flg & 
                                (ruby_block.call(res[i]) != ruby_block.call(elem)))
                    else
                        flg <= (flg & (res[i] != elem))
                    end
                end
                # If flg is 1 the element is new, if it is the right
                # position, add it to the result.
                hif((idx == i) & flg) do
                    # An set the new min in current position.
                    res[i] <= elem
                    # For next position now.
                    idx <= idx + 1
                    # Stop here for current element.
                    flg <= 0
                end
            end
        end
    end
    # Fills the remaining location with 0.
    SequencerT.current.swhile(idx < enum.size) do
        res[idx] <= 0
        idx <= idx + 1
    end
    return res
end

#szip(obj, &ruby_block) ⇒ Object

HW implementation of the Ruby zip. NOTE: for now szip is deactivated untile tuples are properly handled by HDLRuby.



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# File 'lib/HDLRuby/std/sequencer.rb', line 1610

def szip(obj,&ruby_block)
    res = nil
    l0,r0,l1,r1 = nil,nil,nil,nil
    idx = nil
    enum0 = self.seach
    enum1 = obj.seach
    # Compute the minimal and maximal iteration sizes of both
    # enumerables.
    size_min = [enum0.size,enum1.size].min
    size_max = [enum0.size,enum1.size].max
    HDLRuby::High.cur_system.open do
        # If there is no ruby_block, szip generates a resulting vector
        # and its access indexes.
        unless ruby_block then
            res = bit[enum0.type.width+enum1.type.width][-size_max].inner(HDLRuby.uniq_name(:"zip_res"))
            l0 = enum0.type.width+enum1.type.width - 1
            r0 = enum1.type.width
            l1 = r0-1
            r1 = 0
        end
        # Generate the index.
        idx = [size_max.width].inner(HDLRuby.uniq_name(:"zip_idx"))
    end
    # Do the iteration.
    enum0.srewind
    enum1.srewind
    # As long as there is enough elements.
    idx <= 0
    SequencerT.current.swhile(idx < size_min) do
        # Generate the access to the elements.
        elem0 = enum0.snext
        elem1 = enum1.snext
        if ruby_block then
            # A ruby block is given, applies it directly on the elements.
            ruby_block.call(elem0,elem1)
        else
            # No ruby block, put the access results into res.
            # res[idx][l0..r0] <= elem0
            # res[idx][l1..r1] <= elem1
            res[idx] <= [elem0,elem1]
        end
        idx <= idx + 1
    end
    # For the remaining iteration use zeros for the smaller enumerable.
    SequencerT.current.swhile(idx < size_max) do
        # Generate the access to the elements.
        elem0 = enum0.size < size_max ? 0 : enum0.snext
        elem1 = enum1.size < size_max ? 0 : enum1.snext
        if ruby_block then
            # A ruby block is given, applies it directly on the elements.
            ruby_block.call(elem0,elem1)
        else
            # No ruby block, put the access results into res.
            # res[idx][l0..r0] <= elem0
            # res[idx][l1..r1] <= elem1
            res[idx] <= [elem0,elem1]
        end
        idx <= idx + 1
    end
    unless ruby_block then
        return res
    end
end