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Re: [Qemu-devel] [Qemu-ppc] TCG and branches
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From: |
Nikunj A Dadhania |
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Subject: |
Re: [Qemu-devel] [Qemu-ppc] TCG and branches |
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Date: |
Mon, 01 Aug 2016 00:01:53 +0530 |
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User-agent: |
Notmuch/0.21 (https://notmuchmail.org) Emacs/25.0.94.1 (x86_64-redhat-linux-gnu) |
Nikunj A Dadhania <address@hidden> writes:
> Benjamin Herrenschmidt <address@hidden> writes:
>
>> Hi Richard !
>>
>> So in my discovery of TCG, one thing I noticed is the horrendous amount
>> of code generated for branches, especially conditional ones.
>>
>
> static inline void gen_bcond(DisasContext *ctx, int type)
> {
> [...]
> if ((bo & 0x4) == 0) {
> /* Decrement and test CTR */
> [...]
> if (bo & 0x2) {
> tcg_gen_brcondi_tl(TCG_COND_NE, temp, 0, l1);
> } else {
> tcg_gen_brcondi_tl(TCG_COND_EQ, temp, 0, l1);
> }
>
> BUG, both jumping to same label?
Sorry for the noise, I understood it wrong.
Regards
Nikunj