Class: RubyHDL::High::Transmit

Inherits:
Statement show all
Defined in:
lib/HDLRuby/std/sequencer_sw.rb

Overview

Describes a SW implementation of a transmit statement.

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Statement

#each_statement, #each_statement_deep

Constructor Details

#initialize(left, right) ⇒ Transmit

Create a new transmit statement with left value +left+ and right value +right+.



2326
2327
2328
2329
2330
2331
2332
 
# File 'lib/HDLRuby/std/sequencer_sw.rb', line 2326

def initialize(left,right)
  @left = left.to_expr
  @right = right.to_expr
  # Add the transmit to the top SW block.
  # (It will be removed after if it was actually a comparison).
  RubyHDL::High.top_sblock << self
end

Instance Attribute Details

#left ⇒ Object (readonly)

Returns the value of attribute left.



2322
2323
2324
 
# File 'lib/HDLRuby/std/sequencer_sw.rb', line 2322

def left
  @left
end

#right ⇒ Object (readonly)

Returns the value of attribute right.



2322
2323
2324
 
# File 'lib/HDLRuby/std/sequencer_sw.rb', line 2322

def right
  @right
end

Instance Method Details

#to_c ⇒ Object

Convert to C code.



2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
 
# File 'lib/HDLRuby/std/sequencer_sw.rb', line 2367

def to_c
  if (@left.is_a?(RefIndex) or @left.is_a?(RefRange)) then
    if @left.base.type.base.is_a?(TypeVector) then
      return "#{@left.to_c} = #{@right.to_c};"
    else
      # Get the access range.
      rng = @left.range
      # Compute the writing and clearing masks
      smask = (1.to_value<<(rng.first+1-rng.last))-1
      cmask = ~(smask << rng.last)
      # Get the final base.
      base = left.final_base.to_c
      # Generate the ruby code.
      return "#{base} &= #{cmask.to_c}; " +
        "#{base} |= (((#{@right.to_c} & #{smask.to_c}) << (#{rng.last.to_c})))"
    end
  else
    return "#{@left.to_c} = #{@right.to_c};"
  end
end

#to_expr ⇒ Object

Convert to expression: transforms the transmit to a comparison.



2335
2336
2337
2338
2339
2340
 
# File 'lib/HDLRuby/std/sequencer_sw.rb', line 2335

def to_expr
  # Remove the transmit from the top SW block.
  RubyHDL::High.top_sblock.delete(self)
  # And convert it to a comparison.
  return Binary.new(@left.type,@left,@right)
end

#to_python(l = "") ⇒ Object

Convert to Python code.



2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
 
# File 'lib/HDLRuby/std/sequencer_sw.rb', line 2389

def to_python(l = "")
  if (@left.is_a?(RefIndex) or @left.is_a?(RefRange)) then
    if @left.base.type.base.is_a?(TypeVector) then
      # Assign inside array.
      base = @left.final_base.to_python
      return "#{l}try:\n#{l}  #{base}\n" + 
        "#{l}except NameError:\n#{l}  #{base} = []\n" +
        "#{l}#{@left.to_python} = #{@right.to_python}"
    else
      # Get the access range.
      rng = @left.range
      # Compute the writing and clearing masks
      smask = (1.to_value<<(rng.first+1-rng.last))-1
      cmask = ~(smask << rng.last)
      # Get the final base.
      base = left.final_base.to_ruby
      # Generate the ruby code.
      return "#{l}#{base} &= #{cmask.to_python}\n" +
        "#{l}#{base} |= (((#{@right.to_python} & #{smask.to_python}) << (#{rng.last.to_python})))"
    end
  else
    return "#{l}#{@left.to_python} = #{@right.to_python}"
  end
end

#to_ruby ⇒ Object

Convert to Ruby code.



2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
 
# File 'lib/HDLRuby/std/sequencer_sw.rb', line 2343

def to_ruby
  if (@left.is_a?(RefIndex) or @left.is_a?(RefRange)) then
    if @left.base.type.base.is_a?(TypeVector) then
      # Assign inside array.
      base = @left.final_base.to_ruby
      return "#{base} ||= []; #{@left.to_ruby} = #{@right.to_ruby}"
    else
      # Get the access range.
      rng = @left.range
      # Compute the writing and clearing masks
      smask = (1.to_value<<(rng.first+1-rng.last))-1
      cmask = ~(smask << rng.last)
      # Get the final base.
      base = left.final_base.to_ruby
      # Generate the ruby code.
      return "#{base} &= #{cmask.to_ruby}; " +
        "#{base} |= (((#{@right.to_ruby} & #{smask.to_ruby}) << (#{rng.last.to_ruby})))"
    end
  else
    return "#{@left.to_ruby} = #{@right.to_ruby}"
  end
end