On 05/27/2010 12:33 PM, Amker.Cheng wrote:
while GCC3.4.4 treats the long long multiplication just like simple
ones, which generates only one
mult insn for each statement, like

In my understanding, It‘s not necessary using three mult insn to implement
long long mult, since the operands are converted from int type.

This is more helpful. It is a known case in which GCC 4.x generates worse code.

Paolo

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