Info Catalog as: Xtensa Optimizations as: Xtensa Automatic Alignment

as: Density Instructions

 
 9.54.3.1 Using Density Instructions
 ...................................
 
 The Xtensa instruction set has a code density option that provides
 16-bit versions of some of the most commonly used opcodes.  Use of these
 opcodes can significantly reduce code size.  When possible, the
 assembler automatically translates instructions from the core Xtensa
 instruction set into equivalent instructions from the Xtensa code
 density option.  This translation can be disabled by using underscore
 prefixes (Opcode Names Xtensa Opcodes.), by using the
DONTPRINTYET  '--no-transform' command-line option (Command Line Options Xtensa
 Options.), or by using the 'no-transform' directive (*notetransform:
DONTPRINTYET  '--no-transform' command-line option (Command Line Options Xtensa
 Options.), or by using the 'no-transform' directive (transform

 Transform Directive.).
 
    It is a good idea _not_ to use the density instructions directly.
 The assembler will automatically select dense instructions where
 possible.  If you later need to use an Xtensa processor without the code
 density option, the same assembly code will then work without
 modification.
 

Info Catalog as: Xtensa Optimizations as: Xtensa Automatic Alignment