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Re: [RFC PATCH 17/42] target/mips/tx79: Introduce PEXTUW (Parallel Exten


From: Richard Henderson
Subject: Re: [RFC PATCH 17/42] target/mips/tx79: Introduce PEXTUW (Parallel Extend Upper from Word)
Date: Mon, 15 Feb 2021 08:44:50 -0800
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0

On 2/14/21 9:58 AM, Philippe Mathieu-Daudé wrote:
> +    tcg_gen_deposit_i64(cpu_gpr[a->rd], bx, ax, 32, 32);
> +    tcg_gen_shri_i64(bx, bx, 32);
> +    tcg_gen_deposit_i64(cpu_gpr_hi[a->rd], ax, bx, 0, 32);

I think you should pull this out as a helper:

void gen_pextw(TCGv_i64 dl, TCGv_i64 dh, TCGv_i64 a, TCGv_i64 b);

since you'll re-use this for PEXTLW.


r~



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