From: Fredrik Noring <noring@nocrew.org>
To: "Maciej W. Rozycki" <macro@linux-mips.org>
Cc: "Philippe Mathieu-Daudé" <f4bug@amsat.org>,
"Richard Henderson" <richard.henderson@linaro.org>,
"Aleksandar Markovic" <amarkovic@wavecomp.com>,
"Aurelien Jarno" <aurelien@aurel32.net>,
"qemu-devel@nongnu.org Developers" <qemu-devel@nongnu.org>,
"Jürgen Urban" <JuergenUrban@gmx.de>
Subject: Re: [Qemu-devel] [PATCH] target/mips: Support Toshiba specific three-operand MADD and MADDU
Date: Mon, 15 Oct 2018 19:02:02 +0200 [thread overview]
Message-ID: <20181015170202.GB2364@sx9> (raw)
In-Reply-To: <alpine.LFD.2.21.1810142320320.16498@eddie.linux-mips.org>
Hi Maciej, Philippe,
> So results of individual operations are as in the comments with this
> code:
>
> mthi $0 # HI <- 0
> mtlo $0 # LO <- 0
> addiu $2, $0, 1 # $2 <- 1
> lui $3, 0x4000 # $3 <- 0x40000000
> maddu $4, $3, $2 # HI <- 0
> # LO <- 0x40000000
> # $4 <- 0x40000000
> maddu $5, $4, $2 # HI <- 0
> # LO <- 0xffffffff80000000
> # $5 <- 0xffffffff80000000
> maddu $6, $4, $2 # HI <- 1
> # LO <- 0
> # $6 <- 0
Adding tests such as the one above to for example tests/tcg/mips/txx9/
would be useful, I think. As previously noted, GCC can produce 32-bit
R5900 programs but 64-bit compilations fail, so full test coverage may
not be easily obtainable at the moment.
Fredrik
next prev parent reply other threads:[~2018-10-15 17:02 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-14 14:29 [Qemu-devel] [PATCH] target/mips: Support Toshiba specific three-operand MADD and MADDU Philippe Mathieu-Daudé
2018-10-14 16:41 ` Fredrik Noring
2018-10-14 21:56 ` Philippe Mathieu-Daudé
2018-10-14 23:03 ` Maciej W. Rozycki
2018-10-15 17:02 ` Fredrik Noring [this message]
2018-10-16 9:43 ` Aleksandar Markovic
2018-10-16 18:19 ` Fredrik Noring
2018-10-16 18:37 ` Richard Henderson
2018-10-16 18:52 ` Fredrik Noring
2018-10-16 19:02 ` Maciej W. Rozycki
2018-10-19 18:09 ` Aleksandar Markovic
2018-10-28 19:43 ` Aleksandar Markovic
2018-10-28 20:00 ` Maciej W. Rozycki
2018-10-29 11:52 ` Aleksandar Markovic
2018-10-29 14:51 ` Fredrik Noring
2018-10-29 15:03 ` Aleksandar Markovic
2018-10-29 15:44 ` Maciej W. Rozycki
2018-10-16 18:55 ` Maciej W. Rozycki
2018-10-15 15:36 ` Fredrik Noring
2018-10-24 18:01 ` Fredrik Noring
2018-10-26 11:17 ` Aleksandar Markovic
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