* [PATCH] tcg: Document ctpop opcodes
@ 2021-11-10 12:20 Richard Henderson
2021-11-10 12:32 ` Philippe Mathieu-Daudé
0 siblings, 1 reply; 2+ messages in thread
From: Richard Henderson @ 2021-11-10 12:20 UTC (permalink / raw)
To: qemu-devel; +Cc: f4bug
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
+the function name used in include/qemu/host-utils.h.
+
********* Shifts/Rotates
* shl_i32/i64 t0, t1, t2
--
2.25.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] tcg: Document ctpop opcodes
2021-11-10 12:20 [PATCH] tcg: Document ctpop opcodes Richard Henderson
@ 2021-11-10 12:32 ` Philippe Mathieu-Daudé
0 siblings, 0 replies; 2+ messages in thread
From: Philippe Mathieu-Daudé @ 2021-11-10 12:32 UTC (permalink / raw)
To: Richard Henderson, qemu-devel
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>
^ permalink raw reply [flat|nested] 2+ messages in thread
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