From: "Nicholas Piggin" <npiggin@gmail.com>
To: "Richard Henderson" <richard.henderson@linaro.org>,
<qemu-devel@nongnu.org>
Cc: <jniethe5@gmail.com>, <qemu-ppc@nongnu.org>
Subject: Re: [PATCH v2 6/7] tcg/ppc: Disable USE_REG_TB for Power v3.1
Date: Wed, 09 Aug 2023 21:21:53 +1000 [thread overview]
Message-ID: <CUNZ3S3QUQ4V.OQZZMUYGOQO8@wheely> (raw)
In-Reply-To: <20230808030250.50602-7-richard.henderson@linaro.org>
On Tue Aug 8, 2023 at 1:02 PM AEST, Richard Henderson wrote:
> With Power v3.1, we have pc-relative addressing and so
> do not require a register holding the current TB.
>
Acked-by: Nicholas Piggin <npiggin@gmail.com>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> tcg/ppc/tcg-target.c.inc | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/tcg/ppc/tcg-target.c.inc b/tcg/ppc/tcg-target.c.inc
> index 01ca5c9f39..63fe4ef995 100644
> --- a/tcg/ppc/tcg-target.c.inc
> +++ b/tcg/ppc/tcg-target.c.inc
> @@ -83,7 +83,7 @@
> #define TCG_VEC_TMP2 TCG_REG_V1
>
> #define TCG_REG_TB TCG_REG_R31
> -#define USE_REG_TB (TCG_TARGET_REG_BITS == 64)
> +#define USE_REG_TB (TCG_TARGET_REG_BITS == 64 && !have_isa_3_10)
>
> /* Shorthand for size of a pointer. Avoid promotion to unsigned. */
> #define SZP ((int)sizeof(void *))
next prev parent reply other threads:[~2023-08-09 11:23 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-08 3:02 [PATCH for-8.2 v2 0/7] tcg/ppc: Support power10 prefixed instructions Richard Henderson
2023-08-08 3:02 ` [PATCH v2 1/7] tcg/ppc: Untabify tcg-target.c.inc Richard Henderson
2023-08-09 8:55 ` Nicholas Piggin
2023-08-08 3:02 ` [PATCH v2 2/7] tcg/ppc: Use PADDI in tcg_out_movi Richard Henderson
2023-08-09 9:03 ` Nicholas Piggin
2023-08-08 3:02 ` [PATCH v2 3/7] tcg/ppc: Use prefixed instructions in tcg_out_mem_long Richard Henderson
2023-08-09 11:00 ` Nicholas Piggin
2023-08-08 3:02 ` [PATCH v2 4/7] tcg/ppc: Use PLD in tcg_out_movi for constant pool Richard Henderson
2023-08-09 11:20 ` Nicholas Piggin
2023-08-08 3:02 ` [PATCH v2 5/7] tcg/ppc: Use prefixed instructions in tcg_out_dupi_vec Richard Henderson
2023-08-08 3:02 ` [PATCH v2 6/7] tcg/ppc: Disable USE_REG_TB for Power v3.1 Richard Henderson
2023-08-09 11:21 ` Nicholas Piggin [this message]
2023-08-08 3:02 ` [PATCH v2 7/7] tcg/ppc: Use prefixed instructions for tcg_out_goto_tb Richard Henderson
2023-08-09 2:56 ` Jordan Niethe
2023-08-09 3:18 ` Richard Henderson
2023-08-09 11:24 ` Nicholas Piggin
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