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Message
From: Mark<mark@j...>
Date: Sat Mar 22 06:03:00 CET 2008
Subject: [openrisc] Dead Loop in Generated Image of OR1200
rachel_cy@h... wrote:
> 5 80000010: 1b 80 00 01 l.movhi r28,0x1
> 6 80000014: ab 9c 2f 94 l.ori r28,r28,0x2f94
> 7 80000018: 1b c0 00 01 l.movhi r30,0x1
> 8 8000001c: ab de 2f e0 l.ori r30,r30,0x2fe0
> 9 80000020: d4 1c 00 00 l.sw 0x0(r28),r0
> 10 80000024: e4 9c f0 00 l.sfltu r28,r30
> 11 80000028: 13 ff ff fe l.bf 0x80000020
> 12 8000002c: 9f 9c 00 04 l.addi r28,r28,0x4
By "dead loop", do you mean infinite loop? Or loop in which no
iterations are executed? Either way, I don't think that's what's
happening here.
Maybe I'm misunderstanding, but I believe this loop fills 0x00012f94 to
0x00012fdc with 0x00000000. The addi is in the branch delay slot.
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