From: Fredrik Noring <noring@nocrew.org>
To: "Philippe Mathieu-Daudé" <f4bug@amsat.org>,
"Maciej W. Rozycki" <macro@orcam.me.uk>
Cc: "Thomas Huth" <thuth@redhat.com>,
"Aleksandar Rikalo" <aleksandar.rikalo@syrmia.com>,
"Richard Henderson" <richard.henderson@linaro.org>,
qemu-devel@nongnu.org, "Laurent Vivier" <laurent@vivier.eu>,
"Wainer dos Santos Moschetta" <wainersm@redhat.com>,
"Cleber Rosa" <crosa@redhat.com>,
"Alex Bennée" <alex.bennee@linaro.org>,
"Aurelien Jarno" <aurelien@aurel32.net>
Subject: Re: [RFC PATCH 41/42] tests/acceptance: Test R5900 CPU with BusyBox from Sony PS2
Date: Mon, 15 Feb 2021 15:28:09 +0100 [thread overview]
Message-ID: <YCqE+QCFbsW4MVmJ@sx9> (raw)
In-Reply-To: <20210214175912.732946-42-f4bug@amsat.org>
On Sun, Feb 14, 2021 at 06:59:11PM +0100, Philippe Mathieu-Daudé wrote:
> Test BusyBox on the R5900 CPU with 2 different binaries:
>
> - o32 32-bit (statically linked)
> - o32 64-bit (dynamically linked, uses multimedia instructions)
R5900/libc update:
Gnu libc for o32 was merged some time ago so any recent Gentoo etc. will
do fine without patches.
For n32, there's a provisional patch that needs reworking to get merged
(to have libc emulate DMULT etc. rather than the kernel/QEMU).[1]
Musl has a pending patch I posted[2] about a month ago. Musl is o32 only,
for all MIPS, but other than that it's got two significant advantages
over Gnu libc:
1. excellent support for static linking;
2. program sizes are often much smaller, more than 5x smaller observed.
An important detail is that since the R5900 FPU isn't compliant with
the IEEE 754 standard[3] it's normally wholly emulated by either libc or
the kernel, to comply with the MIPS psABI. The R5900 hardware FPU can
perhaps be enabled with a future R5900 ELF ABI annotation extension.[4]
Finally, the situation with the 128-bit R5900 general purpose registers
(GPRs) is not fully resolved with the Linux kernel. The best case
scenario, I believe, would be to have them available at all times.[5]
Fredrik
References:
[1] https://lists.gnu.org/archive/html/qemu-devel/2019-01/msg00974.html
[2] https://www.openwall.com/lists/musl/2020/12/24/2
[3] https://github.com/frno7/linux/wiki/R5900-floating-point-unit-(FPU)
[4] https://github.com/frno7/linux/issues/3
[5] https://github.com/frno7/linux/issues/5
next prev parent reply other threads:[~2021-02-15 14:28 UTC|newest]
Thread overview: 102+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-14 17:58 [RFC PATCH 00/42] target/mips: Reintroduce the R5900 CPU (with more testing) Philippe Mathieu-Daudé
2021-02-14 17:58 ` [RFC PATCH 01/42] linux-user/mips64: Restore setup_frame() for o32 ABI Philippe Mathieu-Daudé
2021-02-14 17:58 ` [RFC PATCH 02/42] linux-user/mips64: Support o32 ABI syscalls Philippe Mathieu-Daudé
2021-02-14 17:58 ` [RFC PATCH 03/42] target/mips/translate: Make cpu_HI/LO registers public Philippe Mathieu-Daudé
2021-02-15 16:12 ` Richard Henderson
2021-02-14 17:58 ` [RFC PATCH 04/42] target/mips: Promote 128-bit multimedia registers as global ones Philippe Mathieu-Daudé
2021-02-15 16:14 ` Richard Henderson
2021-02-14 17:58 ` [RFC PATCH 05/42] target/mips: Rename 128-bit upper halve GPR registers Philippe Mathieu-Daudé
2021-02-15 16:15 ` Richard Henderson
2021-02-14 17:58 ` [RFC PATCH 06/42] target/mips: Introduce gen_load_gpr_hi() / gen_store_gpr_hi() helpers Philippe Mathieu-Daudé
2021-02-15 16:15 ` Richard Henderson
2021-02-14 17:58 ` [RFC PATCH 07/42] target/mips/translate: Use GPR move functions in gen_HILO1_tx79() Philippe Mathieu-Daudé
2021-02-15 16:17 ` Richard Henderson
2021-02-14 17:58 ` [RFC PATCH 08/42] target/mips/tx79: Move MFHI1 / MFLO1 opcodes to decodetree Philippe Mathieu-Daudé
2021-02-15 16:21 ` Richard Henderson
2021-02-14 17:58 ` [RFC PATCH 09/42] target/mips/tx79: Move MTHI1 / MTLO1 " Philippe Mathieu-Daudé
2021-02-15 16:23 ` Richard Henderson
2021-02-14 17:58 ` [RFC PATCH 10/42] target/mips/translate: Simplify PCPYH using deposit_i64() Philippe Mathieu-Daudé
2021-02-15 16:24 ` Richard Henderson
2021-02-14 17:58 ` [RFC PATCH 11/42] target/mips/tx79: Move PCPYH opcode to decodetree Philippe Mathieu-Daudé
2021-02-15 16:26 ` Richard Henderson
2021-03-08 10:48 ` Philippe Mathieu-Daudé
2021-03-08 11:57 ` Philippe Mathieu-Daudé
2021-03-09 14:25 ` Richard Henderson
2021-02-14 17:58 ` [RFC PATCH 12/42] target/mips/tx79: Move PCPYLD / PCPYUD opcodes " Philippe Mathieu-Daudé
2021-02-15 16:28 ` Richard Henderson
2021-02-15 16:58 ` Philippe Mathieu-Daudé
2021-02-14 17:58 ` [RFC PATCH 13/42] target/mips: Remove 'C790 Multimedia Instructions' dead code Philippe Mathieu-Daudé
2021-02-15 16:32 ` Richard Henderson
2021-02-14 17:58 ` [RFC PATCH 14/42] target/mips/tx79: Salvage instructions description comment Philippe Mathieu-Daudé
2021-02-15 16:33 ` Richard Henderson
2021-02-14 17:58 ` [RFC PATCH 15/42] target/mips/tx79: Introduce PAND/POR/PXOR/PNOR opcodes (parallel logic) Philippe Mathieu-Daudé
2021-02-15 16:35 ` Richard Henderson
2021-02-14 17:58 ` [RFC PATCH 16/42] target/mips/tx79: Introduce PSUB* opcodes (Parallel Subtract) Philippe Mathieu-Daudé
2021-02-15 16:38 ` Richard Henderson
2021-03-08 18:46 ` Philippe Mathieu-Daudé
2021-02-14 17:58 ` [RFC PATCH 17/42] target/mips/tx79: Introduce PEXTUW (Parallel Extend Upper from Word) Philippe Mathieu-Daudé
2021-02-15 16:44 ` Richard Henderson
2021-03-08 18:40 ` Philippe Mathieu-Daudé
2021-02-14 17:58 ` [RFC PATCH 18/42] target/mips/tx79: Introduce PEXTU[BHW] opcodes (Parallel Extend Lower) Philippe Mathieu-Daudé
2021-02-15 18:28 ` Richard Henderson
2021-02-14 17:58 ` [RFC PATCH 19/42] target/mips/tx79: Introduce PCEQ* opcodes (Parallel Compare for Equal) Philippe Mathieu-Daudé
2021-02-15 20:32 ` Richard Henderson
2021-02-14 17:58 ` [RFC PATCH 20/42] target/mips/tx79: Introduce PCGT* (Parallel Compare for Greater Than) Philippe Mathieu-Daudé
2021-02-14 17:58 ` [RFC PATCH 21/42] target/mips/tx79: Introduce PPACW opcode (Parallel Pack to Word) Philippe Mathieu-Daudé
2021-02-15 20:38 ` Richard Henderson
2021-02-14 17:58 ` [RFC PATCH 22/42] target/mips/tx79: Introduce PINTEH (Parallel Interleave Even Halfword) Philippe Mathieu-Daudé
2021-02-15 20:41 ` Richard Henderson
2021-02-14 17:58 ` [RFC PATCH 23/42] target/mips/tx79: Introduce PEXE[HW] opcodes (Parallel Exchange Even) Philippe Mathieu-Daudé
2021-02-15 20:45 ` Richard Henderson
2021-02-14 17:58 ` [RFC PATCH 24/42] target/mips/tx79: Introduce PROT3W opcode (Parallel Rotate 3 Words) Philippe Mathieu-Daudé
2021-02-15 20:49 ` Richard Henderson
2021-02-14 17:58 ` [RFC PATCH 25/42] target/mips/tx79: Introduce LQ opcode (Load Quadword) Philippe Mathieu-Daudé
2021-02-15 20:51 ` Richard Henderson
2021-02-14 17:58 ` [RFC PATCH 26/42] target/mips/tx79: Introduce SQ opcode (Store Quadword) Philippe Mathieu-Daudé
2021-02-15 20:51 ` Richard Henderson
2021-02-14 17:58 ` [RFC PATCH 27/42] target/mips/translate: Make gen_rdhwr() public Philippe Mathieu-Daudé
2021-02-15 20:51 ` Richard Henderson
2021-02-14 17:58 ` [RFC PATCH 28/42] target/mips/tx79: Move RDHWR usermode kludge to trans_SQ() Philippe Mathieu-Daudé
2021-02-15 21:01 ` Richard Henderson
2021-02-16 7:05 ` Fredrik Noring
2021-02-16 12:21 ` Maciej W. Rozycki
2021-02-16 13:04 ` Fredrik Noring
2021-02-14 17:58 ` [RFC PATCH 29/42] linux-user/mips64: Support the n32 ABI for the R5900 Philippe Mathieu-Daudé
2021-02-15 21:02 ` Richard Henderson
2021-02-14 17:59 ` [RFC PATCH 30/42] target/mips: Reintroduce the R5900 CPU Philippe Mathieu-Daudé
2021-02-15 21:04 ` Richard Henderson
2021-02-14 17:59 ` [RFC PATCH 31/42] default-configs: Support o32 ABI with R5900 64-bit MIPS CPU Philippe Mathieu-Daudé
2021-02-15 21:05 ` Richard Henderson
2021-02-14 17:59 ` [RFC PATCH 32/42] docker: Add gentoo-mipsr5900el-cross image Philippe Mathieu-Daudé
2021-02-15 11:59 ` Daniel P. Berrangé
2021-02-15 13:45 ` Fredrik Noring
2021-02-20 20:01 ` Philippe Mathieu-Daudé
2021-03-12 15:10 ` Philippe Mathieu-Daudé
2021-03-12 17:05 ` Maciej W. Rozycki
2021-03-12 17:46 ` Philippe Mathieu-Daudé
2021-03-12 20:04 ` Maciej W. Rozycki
2021-03-13 7:02 ` Fredrik Noring
2021-03-17 18:55 ` Philippe Mathieu-Daudé
2021-03-17 22:21 ` Maciej W. Rozycki
2021-03-12 18:24 ` Fredrik Noring
2021-03-12 20:05 ` Philippe Mathieu-Daudé
2021-02-14 17:59 ` [RFC PATCH 33/42] gitlab-ci: Pass optional EXTRA_FILES when building docker images Philippe Mathieu-Daudé
2021-02-14 17:59 ` [RFC PATCH 34/42] gitlab-ci: Build MIPS R5900 cross-toolchain (Gentoo based) Philippe Mathieu-Daudé
2021-02-15 11:42 ` Philippe Mathieu-Daudé
2021-02-15 11:58 ` Daniel P. Berrangé
2021-02-14 17:59 ` [RFC PATCH 35/42] tests/tcg: Add MIPS R5900 to arches filter Philippe Mathieu-Daudé
2021-02-14 17:59 ` [RFC PATCH 36/42] tests/tcg/mips: Test user mode DMULT for the R5900 Philippe Mathieu-Daudé
2021-02-14 17:59 ` [RFC PATCH 37/42] gitlab-ci: Add job to test the MIPS r5900o32el target Philippe Mathieu-Daudé
2021-02-15 5:31 ` Thomas Huth
2021-02-15 8:07 ` Philippe Mathieu-Daudé
2021-02-15 8:11 ` Philippe Mathieu-Daudé
2021-02-14 17:59 ` [RFC PATCH 38/42] tests/acceptance: Extract QemuBaseTest from Test Philippe Mathieu-Daudé
2021-02-14 17:59 ` [RFC PATCH 39/42] tests/acceptance: Make pick_default_qemu_bin() more generic Philippe Mathieu-Daudé
2021-02-14 17:59 ` [RFC PATCH 40/42] tests/acceptance: Introduce QemuUserTest base class Philippe Mathieu-Daudé
2021-02-14 17:59 ` [RFC PATCH 41/42] tests/acceptance: Test R5900 CPU with BusyBox from Sony PS2 Philippe Mathieu-Daudé
2021-02-15 14:28 ` Fredrik Noring [this message]
2021-02-15 14:46 ` Maciej W. Rozycki
2021-02-14 17:59 ` [RFC PATCH 42/42] gitlab-ci: Add job to run integration tests for the r5900o32el target Philippe Mathieu-Daudé
2021-02-14 18:08 ` [RFC PATCH 00/42] target/mips: Reintroduce the R5900 CPU (with more testing) Philippe Mathieu-Daudé
2021-02-15 9:24 ` Philippe Mathieu-Daudé
2021-02-21 14:04 ` Philippe Mathieu-Daudé
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=YCqE+QCFbsW4MVmJ@sx9 \
--to=noring@nocrew.org \
--cc=aleksandar.rikalo@syrmia.com \
--cc=alex.bennee@linaro.org \
--cc=aurelien@aurel32.net \
--cc=crosa@redhat.com \
--cc=f4bug@amsat.org \
--cc=laurent@vivier.eu \
--cc=macro@orcam.me.uk \
--cc=qemu-devel@nongnu.org \
--cc=richard.henderson@linaro.org \
--cc=thuth@redhat.com \
--cc=wainersm@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).