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Re: [Qemu-devel] [PATCH 5/8] tcg: Add interpreter for bytecode

From: Paolo Bonzini
Subject: Re: [Qemu-devel] [PATCH 5/8] tcg: Add interpreter for bytecode
Date: Sun, 18 Sep 2011 09:22:43 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:6.0.2) Gecko/20110906 Thunderbird/6.0.2

On 09/18/2011 07:49 AM, Stefan Weil wrote:
Is there really any difference in the generated code?
gcc already uses a jump table internally to handle the
switch cases.

You typically save something on range checks, and it enables a lot more tricks for use later (e.g. using multiple jump tables to perform simple peephole optimizations, or to divert code execution on interrupts).


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