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Re: [Qemu-devel] [PATCH 1/2] tcg/i386: remove suboptimal register shifti
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From: |
Richard Henderson |
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Subject: |
Re: [Qemu-devel] [PATCH 1/2] tcg/i386: remove suboptimal register shifting |
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Date: |
Sun, 21 Oct 2012 16:41:43 +1000 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:16.0) Gecko/20121016 Thunderbird/16.0.1 |
On 2012-10-21 03:28, Aurelien Jarno wrote:
> Now that CONFIG_TCG_PASS_AREG0 has been removed, it's easier to get
> an optimal code for the load/store functions.
>
> First swap the two registers used in tcg_out_tlb_load() so that the
> address end-up in the second register instead of the first one. Adjust
> tcg_out_qemu_ld() and tcg_out_qemu_st() to respectively call
> tcg_out_qemu_ld_direct() and tcg_out_qemu_st_direct() with the correct
> registers. Then replace the register shifting by direct load of the
> arguments.
>
> Signed-off-by: Aurelien Jarno <address@hidden>
Reviewed-by: Richard Henderson <address@hidden>
r~