From: Richard Henderson <richard.henderson@linaro.org>
To: Ilya Leoshkevich <iii@linux.ibm.com>, qemu-devel@nongnu.org
Cc: david@redhat.com
Subject: Re: [PATCH for-8.0 v2 12/13] target/s390x: Use tcg_gen_atomic_cmpxchg_i128 for CDSG
Date: Mon, 28 Nov 2022 16:02:39 -0800 [thread overview]
Message-ID: <0ab87401-268a-4b97-c4bf-37066e3968a1@linaro.org> (raw)
In-Reply-To: <20221128234051.7j3tre72owh4eyif@heavy>
On 11/28/22 15:40, Ilya Leoshkevich wrote:
> On an s390x host we fall back to cpu_exec_step_atomic(), because in the
> configure test:
>
> int main(void)
> {
> unsigned __int128 x = 0, y = 0;
> __sync_val_compare_and_swap_16(&x, y, x);
> return 0;
> }
>
> x and y are not aligned. I guess that's working as intended as well,
> even though it would be nice to eventually make use of cdsg there.
I have a fix for that as a part of '[PATCH for-8.0 00/29] tcg: Improve atomicity support':
https://lore.kernel.org/qemu-devel/20221118094754.242910-14-richard.henderson@linaro.org/
r~
next prev parent reply other threads:[~2022-11-29 0:03 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-11 8:08 [PATCH for-8.0 v2 00/13] target/s390x: Use TCGv_i128 Richard Henderson
2022-11-11 8:08 ` [PATCH for-8.0 v2 01/13] tests/tcg/s390x: Add div.c Richard Henderson
2022-11-11 8:08 ` [PATCH for-8.0 v2 02/13] tests/tcg/s390x: Add clst.c Richard Henderson
2022-11-11 8:08 ` [PATCH for-8.0 v2 03/13] tests/tcg/s390x: Add long-double.c Richard Henderson
2022-11-11 8:08 ` [PATCH for-8.0 v2 04/13] target/s390x: Use a single return for helper_divs32/u32 Richard Henderson
2022-11-28 21:42 ` Ilya Leoshkevich
2022-11-11 8:08 ` [PATCH for-8.0 v2 05/13] target/s390x: Use a single return for helper_divs64/u64 Richard Henderson
2022-11-11 8:08 ` [PATCH for-8.0 v2 06/13] target/s390x: Use Int128 for return from CLST Richard Henderson
2022-11-11 8:08 ` [PATCH for-8.0 v2 07/13] target/s390x: Use Int128 for return from CKSM Richard Henderson
2022-11-11 8:08 ` [PATCH for-8.0 v2 08/13] target/s390x: Use Int128 for return from TRE Richard Henderson
2022-11-11 8:08 ` [PATCH for-8.0 v2 09/13] target/s390x: Copy wout_x1 to wout_x1_P Richard Henderson
2022-11-11 8:08 ` [PATCH for-8.0 v2 10/13] target/s390x: Use Int128 for returning float128 Richard Henderson
2022-11-28 21:53 ` Ilya Leoshkevich
2022-11-11 8:08 ` [PATCH for-8.0 v2 11/13] target/s390x: Use Int128 for passing float128 Richard Henderson
2022-11-28 22:07 ` Ilya Leoshkevich
2022-11-11 8:08 ` [PATCH for-8.0 v2 12/13] target/s390x: Use tcg_gen_atomic_cmpxchg_i128 for CDSG Richard Henderson
2022-11-28 23:40 ` Ilya Leoshkevich
2022-11-28 23:48 ` [PATCH] tests/tcg/s390x: Add cdsg.c Ilya Leoshkevich
2022-11-29 8:54 ` David Hildenbrand
2022-11-29 14:28 ` Ilya Leoshkevich
2022-11-29 14:30 ` [PATCH v2] " Ilya Leoshkevich
2022-11-29 15:24 ` [PATCH v3] " Ilya Leoshkevich
2022-11-29 0:02 ` Richard Henderson [this message]
2022-11-11 8:08 ` [PATCH for-8.0 v2 13/13] target/s390x: Implement CC_OP_NZ in gen_op_calc_cc Richard Henderson
2022-11-28 23:45 ` Ilya Leoshkevich
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