From: David Hildenbrand <david@redhat.com>
To: Richard Henderson <richard.henderson@linaro.org>, qemu-devel@nongnu.org
Cc: alex.bennee@linaro.org, Ilya Leoshkevich <iii@linux.ibm.com>
Subject: Re: [PATCH v5 32/36] target/s390x: Use tcg_gen_atomic_cmpxchg_i128 for CDSG
Date: Fri, 27 Jan 2023 17:09:53 +0100 [thread overview]
Message-ID: <40962115-a8f3-ac9f-d505-8ac94165b68b@redhat.com> (raw)
In-Reply-To: <49c17ab2-c179-724a-0f60-5ff43e9af54e@linaro.org>
On 26.01.23 22:01, Richard Henderson wrote:
> On 1/26/23 01:27, David Hildenbrand wrote:
>>> static DisasJumpType op_csst(DisasContext *s, DisasOps *o)
>>> @@ -5419,6 +5410,14 @@ static void prep_r1_P(DisasContext *s, DisasOps *o)
>>> }
>>> #define SPEC_prep_r1_P SPEC_r1_even
>>> +static void prep_r1_D64(DisasContext *s, DisasOps *o)
>>> +{
>>> + int r1 = get_field(s, r1);
>>> + o->out_128 = tcg_temp_new_i128();
>>> + tcg_gen_concat_i64_i128(o->out_128, regs[r1 + 1], regs[r1]);
>>
>> I really wonder if we should simply move the tcg_gen_concat_i64_i128() into the op and use
>> a generic "allocate out_128" instead.
>>
>> At least that part here confused me heavily.
>
> Just the prep_r1_D64 bit of it?
Yes.
>
> Better for you as
>
>
> C(0xeb3e, CDSG, RSY_a, Z, la2, r3_D64, 0, r1_D64, cdsg, 0)
>
>
> static DisasJumpType op_cdsg(DisasContext *s, DisasOps *o)
> {
> int r1 = get_field(s, r1);
> + o->out_128 = tcg_temp_new_i128();
> + tcg_gen_concat_i64_i128(o->out_128, regs[r1 + 1], regs[r1]);
>
>
> The existing generic "allocate out_128" is named "new_x", which I thought was also
> confusing, since this isn't an "x" format operation. Since there's only one use, I did it
> inline.
LGTM
--
Thanks,
David / dhildenb
next prev parent reply other threads:[~2023-01-27 16:11 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-26 4:37 [PATCH v5 00/36] tcg: Support for Int128 with helpers Richard Henderson
2023-01-26 4:37 ` [PATCH v5 01/36] tcg: Define TCG_TYPE_I128 and related helper macros Richard Henderson
2023-01-26 4:37 ` [PATCH v5 02/36] tcg: Handle dh_typecode_i128 with TCG_CALL_{RET, ARG}_NORMAL Richard Henderson
2023-01-26 4:37 ` [PATCH v5 03/36] tcg: Allocate objects contiguously in temp_allocate_frame Richard Henderson
2023-01-26 17:12 ` Alex Bennée
2023-01-26 19:48 ` Richard Henderson
2023-01-26 4:37 ` [PATCH v5 04/36] tcg: Introduce tcg_out_addi_ptr Richard Henderson
2023-01-26 4:37 ` [PATCH v5 05/36] tcg: Add TCG_CALL_{RET,ARG}_BY_REF Richard Henderson
2023-01-27 10:40 ` Alex Bennée
2023-01-27 18:48 ` Richard Henderson
2023-01-26 4:37 ` [PATCH v5 06/36] tcg: Introduce tcg_target_call_oarg_reg Richard Henderson
2023-01-26 4:37 ` [PATCH v5 07/36] tcg: Add TCG_CALL_RET_BY_VEC Richard Henderson
2023-01-26 4:37 ` [PATCH v5 08/36] include/qemu/int128: Use Int128 structure for TCI Richard Henderson
2023-01-27 13:51 ` Alex Bennée
2023-01-26 4:37 ` [PATCH v5 09/36] tcg/i386: Add TCG_TARGET_CALL_{RET,ARG}_I128 Richard Henderson
2023-01-27 13:52 ` Alex Bennée
2023-01-26 4:37 ` [PATCH v5 10/36] tcg/tci: Fix big-endian return register ordering Richard Henderson
2023-01-27 13:53 ` Alex Bennée
2023-01-26 4:37 ` [PATCH v5 11/36] tcg/tci: Add TCG_TARGET_CALL_{RET,ARG}_I128 Richard Henderson
2023-01-27 14:00 ` Alex Bennée
2023-01-27 18:55 ` Richard Henderson
2023-01-26 4:38 ` [PATCH v5 12/36] tcg: " Richard Henderson
2023-01-27 17:04 ` Alex Bennée
2023-01-26 4:38 ` [PATCH v5 13/36] tcg: Add temp allocation for TCGv_i128 Richard Henderson
2023-01-27 17:08 ` Alex Bennée
2023-01-27 18:56 ` Richard Henderson
2023-01-26 4:38 ` [PATCH v5 14/36] tcg: Add basic data movement " Richard Henderson
2023-01-27 18:23 ` Alex Bennée
2023-01-26 4:38 ` [PATCH v5 15/36] tcg: Add guest load/store primitives " Richard Henderson
2023-01-26 4:38 ` [PATCH v5 16/36] tcg: Add tcg_gen_{non}atomic_cmpxchg_i128 Richard Henderson
2023-01-27 0:45 ` Philippe Mathieu-Daudé
2023-01-27 6:39 ` Richard Henderson
2023-01-27 23:49 ` Philippe Mathieu-Daudé
2023-01-26 4:38 ` [PATCH v5 17/36] tcg: Split out tcg_gen_nonatomic_cmpxchg_i{32,64} Richard Henderson
2023-01-27 0:53 ` Philippe Mathieu-Daudé
2023-01-27 6:44 ` Richard Henderson
2023-01-26 4:38 ` [PATCH v5 18/36] target/arm: Use tcg_gen_atomic_cmpxchg_i128 for STXP Richard Henderson
2023-01-26 4:38 ` [PATCH v5 19/36] target/arm: Use tcg_gen_atomic_cmpxchg_i128 for CASP Richard Henderson
2023-01-26 4:38 ` [PATCH v5 20/36] target/ppc: Use tcg_gen_atomic_cmpxchg_i128 for STQCX Richard Henderson
2023-01-26 4:38 ` [PATCH v5 21/36] tests/tcg/s390x: Add div.c Richard Henderson
2023-01-26 4:38 ` [PATCH v5 22/36] tests/tcg/s390x: Add clst.c Richard Henderson
2023-01-26 4:38 ` [PATCH v5 23/36] tests/tcg/s390x: Add long-double.c Richard Henderson
2023-01-26 4:38 ` [PATCH v5 24/36] target/s390x: Use a single return for helper_divs32/u32 Richard Henderson
2023-01-26 9:58 ` David Hildenbrand
2023-01-27 0:57 ` Philippe Mathieu-Daudé
2023-01-26 4:38 ` [PATCH v5 25/36] target/s390x: Use a single return for helper_divs64/u64 Richard Henderson
2023-01-26 4:38 ` [PATCH v5 26/36] target/s390x: Use Int128 for return from CLST Richard Henderson
2023-01-26 4:38 ` [PATCH v5 27/36] target/s390x: Use Int128 for return from CKSM Richard Henderson
2023-01-26 4:38 ` [PATCH v5 28/36] target/s390x: Use Int128 for return from TRE Richard Henderson
2023-01-26 4:38 ` [PATCH v5 29/36] target/s390x: Copy wout_x1 to wout_x1_P Richard Henderson
2023-01-26 4:38 ` [PATCH v5 30/36] target/s390x: Use Int128 for returning float128 Richard Henderson
2023-01-26 10:06 ` David Hildenbrand
2023-01-26 4:38 ` [PATCH v5 31/36] target/s390x: Use Int128 for passing float128 Richard Henderson
2023-01-26 11:19 ` David Hildenbrand
2023-01-26 4:38 ` [PATCH v5 32/36] target/s390x: Use tcg_gen_atomic_cmpxchg_i128 for CDSG Richard Henderson
2023-01-26 11:27 ` David Hildenbrand
2023-01-26 21:01 ` Richard Henderson
2023-01-27 16:09 ` David Hildenbrand [this message]
2023-01-26 4:38 ` [PATCH v5 33/36] target/s390x: Implement CC_OP_NZ in gen_op_calc_cc Richard Henderson
2023-01-26 11:25 ` David Hildenbrand
2023-01-26 4:38 ` [PATCH v5 34/36] target/i386: Split out gen_cmpxchg8b, gen_cmpxchg16b Richard Henderson
2023-01-26 4:38 ` [PATCH v5 35/36] target/i386: Inline cmpxchg8b Richard Henderson
2023-01-26 4:38 ` [PATCH v5 36/36] target/i386: Inline cmpxchg16b Richard Henderson
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