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Re: [PATCH] tcg: Document ctpop opcodes
From: |
Philippe Mathieu-Daudé |
Subject: |
Re: [PATCH] tcg: Document ctpop opcodes |
Date: |
Wed, 10 Nov 2021 13:32:49 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.2.0 |
On 11/10/21 13:20, Richard Henderson wrote:
> Fixes: a768e4e99247
> Resolves: https://gitlab.com/qemu-project/qemu/-/issues/658
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> tcg/README | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/tcg/README b/tcg/README
> index c2e7762a37..391f4d1e80 100644
> --- a/tcg/README
> +++ b/tcg/README
> @@ -254,6 +254,12 @@ t0 = t1 ? clz(t1) : t2
>
> t0 = t1 ? ctz(t1) : t2
>
> +* ctpop_i32/i64 t0, t1
> +
> +t0 = number of bits set in t1
> +With "ctpop" short for "count popultation", matching
Typo "population".
> +the function name used in include/qemu/host-utils.h.
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>