From: "Maciej W. Rozycki" <macro@linux-mips.org>
To: Aleksandar Markovic <amarkovic@wavecomp.com>
Cc: "Fredrik Noring" <noring@nocrew.org>,
"Aurelien Jarno" <aurelien@aurel32.net>,
"Philippe Mathieu-Daudé" <f4bug@amsat.org>,
"Jürgen Urban" <JuergenUrban@gmx.de>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] [PATCH v2 4/6] target/mips: Fix decoding mechanism of special R5900 opcodes
Date: Fri, 9 Nov 2018 13:53:27 +0000 (GMT) [thread overview]
Message-ID: <alpine.LFD.2.21.1811091341070.27920@eddie.linux-mips.org> (raw)
In-Reply-To: <BN6PR2201MB1251F9977B0D4B901801275CC6C60@BN6PR2201MB1251.namprd22.prod.outlook.com>
On Fri, 9 Nov 2018, Aleksandar Markovic wrote:
> > ... and DMULT, DMULTU, DDIV and DDIVU
> > are part of the MIPS III ISA. They are emulated in user mode to support
> > generic MIPS III programs.
>
> Pure MIPS III executables should not be a concern of the R5900
> emulation, but R5900 executables.
I repeat: MIPS III is the available instruction set defined with the base
64-bit MIPS Linux psABI and must not be subsetted. You have to support it
in QEMU Linux user emulation mode for any 64-bit MIPS processor and this
is not debatable, period. QEMU has no control over the Linux ABI, it has
to accept it as it is.
Maciej
next prev parent reply other threads:[~2018-11-09 13:53 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-07 19:17 [Qemu-devel] [PATCH v2 0/6] Fix decoding mechanisms of the R5900 Fredrik Noring
2018-11-07 19:18 ` [Qemu-devel] [PATCH v2 1/6] target/mips: Fix decoding mechanism of R5900 MFLO1, MFHI1, MTLO1 and MTHI1 Fredrik Noring
2018-11-17 15:28 ` Aleksandar Markovic
2018-11-07 19:18 ` [Qemu-devel] [PATCH v2 2/6] target/mips: Fix decoding mechanism of R5900 DIV1 and DIVU1 Fredrik Noring
2018-11-07 19:18 ` [Qemu-devel] [PATCH v2 3/6] target/mips: Fix HI[ac] and LO[ac] 32-bit truncation with MIPS64 DSP ASE Fredrik Noring
2018-11-08 10:17 ` Aleksandar Markovic
2018-11-07 19:19 ` [Qemu-devel] [PATCH v2 4/6] target/mips: Fix decoding mechanism of special R5900 opcodes Fredrik Noring
2018-11-08 10:27 ` Aleksandar Markovic
2018-11-08 18:50 ` Fredrik Noring
2018-11-08 22:00 ` Maciej W. Rozycki
2018-11-09 9:50 ` Aleksandar Markovic
2018-11-09 13:24 ` Fredrik Noring
2018-11-09 14:23 ` Aleksandar Markovic
2018-11-09 14:35 ` Fredrik Noring
2018-11-09 14:37 ` Aleksandar Markovic
2018-11-09 15:23 ` Aleksandar Markovic
2018-11-09 16:49 ` Maciej W. Rozycki
2018-11-09 13:53 ` Maciej W. Rozycki [this message]
2018-11-17 15:25 ` Aleksandar Markovic
2018-11-07 19:19 ` [Qemu-devel] [PATCH v2 5/6] target/mips: Guard check_insn_opc_user_only with INSN_R5900 check Fredrik Noring
2018-11-17 15:27 ` Aleksandar Markovic
2018-11-07 19:19 ` [Qemu-devel] [PATCH v2 6/6] target/mips: Guard check_insn " Fredrik Noring
2018-11-17 15:26 ` Aleksandar Markovic
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