late prop2 RDBYTE idea

Comments

• heater Posts: 3,370

  2009-06-23 20:26 edited 2009-06-23 20:26

  Sometimes yes. But that zero extend saves a lot of masking sometimes when dealing with bytes. On the other hand I was wishing for a sign extended RDBYTE in my emulator codes.
  
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  For me, the past is not over yet.
• Sapieha Posts: 2,964

  2009-06-23 20:42 edited 2009-06-23 20:42

  Hi Bill Henning.
  
  My proposo to Chip was to have 1 instructions that can combine 4 bytes from one register to one Long in another.
  Else 2 Word to one Long. Without destroing other Bytes/Words in that Long
  And one instruction that can take one of 4 bytes from register Long and place in another register.
  Eles 1 Long to one of 2 words
  
  ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
  Nothing is impossible, there are only different degrees of difficulty.
  For every stupid question there is at least one intelligent answer.
  Don't guess - ask instead.
  If you don't ask you won't know.
  If your gonna construct something, make it·as simple as·possible yet as versatile as posible.
  
  
  Sapieha
• Bill Henning Posts: 6,445

  2009-06-23 22:00 edited 2009-06-23 22:00

  Yes, those would be very handy... I proposed something similar to Chip too.
  

  Sapieha said...
  Hi Bill Henning.
  
  My proposo to Chip was to have 1 instructions that can combine 4 bytes from one register to one Long in another.
  Else 2 Word to one Long. Without destroing other Bytes/Words in that Long
  And one instruction that can take one of 4 bytes from register Long and place in another register.
  Eles 1 Long to one of 2 words

  ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
  my 6.250MHz custom Crystals now available - run your Propeller at 100MHz!
  Las - Large model assembler for the Propeller (alpha version released)
  Largos - a feature full nano operating system for the Propeller
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• Sapieha Posts: 2,964

  2009-06-23 22:04 edited 2009-06-23 22:04

  Hi Bill Henning.
  
  But I have one more idea to that instructions.
  
  And it is posiblity in them to reverse Bit order on that combined Bytes/Words at same time.
  
  
  ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
  Nothing is impossible, there are only different degrees of difficulty.
  For every stupid question there is at least one intelligent answer.
  Don't guess - ask instead.
  If you don't ask you won't know.
  If your gonna construct something, make it·as simple as·possible yet as versatile as posible.
  
  
  Sapieha
• Bill Henning Posts: 6,445

  2009-06-23 22:13 edited 2009-06-23 22:13

  Nice!
  

  Sapieha said...
  Hi Bill Henning.
  
  But I have one more idea to that instructions.
  
  And it is posiblity in them to reverse Bit order on that combined Bytes/Words at same time.

  ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
  my 6.250MHz custom Crystals now available - run your Propeller at 100MHz!
  Las - Large model assembler for the Propeller (alpha version released)
  Largos - a feature full nano operating system for the Propeller
  www.mikronauts.com - a new blog about microcontrollers