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Re: [Qemu-devel] [PATCH v2 3/5] target-arm: convert sar, shl and shr hel


From: Aurelien Jarno
Subject: Re: [Qemu-devel] [PATCH v2 3/5] target-arm: convert sar, shl and shr helpers to TCG
Date: Sat, 22 Sep 2012 11:33:26 +0200
User-agent: Mutt/1.5.21 (2010-09-15)

On Fri, Sep 21, 2012 at 04:14:29PM -0700, Richard Henderson wrote:
> On 09/21/2012 12:33 PM, Aurelien Jarno wrote:
> > +static void gen_sar(TCGv dest, TCGv t0, TCGv t1)
> > +{
> > +    TCGv tmp1, tmp2, tmp3;
> > +    tmp1 = tcg_temp_new_i32();
> > +    tcg_gen_andi_i32(tmp1, t1, 0xff);
> > +    tmp2 = tcg_const_i32(0x1f);
> > +    tmp3 = tcg_const_i32(0);
> > +    tcg_gen_movcond_i32(TCG_COND_GTU, tmp1, tmp1, tmp2, tmp2, tmp1);
> > +    tcg_temp_free_i32(tmp3);
> > +    tcg_temp_free_i32(tmp2);
> > +    tcg_gen_andi_i32(tmp1, tmp1, 0x1f);
> > +    tcg_gen_sar_i32(dest, t0, tmp1);
> > +    tcg_temp_free_i32(tmp1);
> > +}
> 
> tmp3 is unused in this version.
> 

Good catch, fix locally.

-- 
Aurelien Jarno                          GPG: 1024D/F1BCDB73
address@hidden                 http://www.aurel32.net



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