On 3/12/06, Steven Bosscher <[EMAIL PROTECTED]> wrote: > > It is valid. We should understand why this behavior has changed so > drastically. >
I've attached assembler output from different compiler versions: 3.4.5-athlon-xp: gcc-3.4.5 -O3 -march=athlon-xp 3.4.5-pentium4: gcc-3.4.5 -O3 -march=pentium4 4.1.0-athlon-xp: gcc-4.1.0 -O3 -march=athlon-xp As you can see, gcc-3.4.5 generates fastest code for "-march=athlon-xp". This code should also run faster on any pentium machine. gcc-4.1.0 generates "same" slow code for "pentium" and "athlon" arch. -- Nickolay
test_cmd-3.4.5-athlon-xp.s
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test_cmd-3.4.5-pentium4.s
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test_cmd-4.1.0-athlon-xp.s
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