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[avr-gcc-list] Optimizations of rotate operations in avr-gcc 4.4
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From: |
Anatoly Sokolov |
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Subject: |
[avr-gcc-list] Optimizations of rotate operations in avr-gcc 4.4 |
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Date: |
Sun, 2 Nov 2008 17:33:31 +0300 |
Hello.
The 'rotate' insn pattern is added in GCC avr back end. Now avr-gcc 4.4 use
SWAP instruction for ((a<<4)|(a>>4)) operation instead of shift-or sequence.
Similarly optimizations for rotation of int and long types on 8, 16 and 24 is
present,
also. Use it.
Anatoliy.
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