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From: "Philippe Mathieu-Daudé" <f4bug@amsat.org>
To: qemu-devel@nongnu.org, Richard Henderson <rth@twiddle.net>,
	Aurelien Jarno <aurelien@aurel32.net>,
	Aleksandar Markovic <aleksandar.markovic@mips.com>
Cc: "Fredrik Noring" <noring@nocrew.org>,
	"Jürgen Urban" <JuergenUrban@gmx.de>,
	"Maciej W. Rozycki" <macro@linux-mips.org>
Subject: Re: [Qemu-devel] [RFC] target/mips: Initial support for MIPS R5900
Date: Fri, 7 Sep 2018 21:03:01 -0300	[thread overview]
Message-ID: <dde6d3cb-f2a4-e36b-69ac-8147fc5e752d@amsat.org> (raw)
In-Reply-To: <20180707194137.GB14409@localhost.localdomain>

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Hi,

On 7/7/18 4:41 PM, Fredrik Noring wrote:
[...]
> --- a/target/mips/mips-defs.h
> +++ b/target/mips/mips-defs.h
> @@ -52,6 +52,7 @@
>  #define   ASE_MSA       0x01000000
>  
>  /* Chip specific instructions. */
> +#define		INSN_R5900	0x10000000

We have 4 bits to store the chip-specific instructions and this is the
last bit available.

Any objection to upraise CPUMIPSState.insn_flags to a uint64_t?
I'd then shift the chip-specific bits to the 32 upper bits, to keep this
flag clean.

>  #define		INSN_LOONGSON2E  0x20000000
>  #define		INSN_LOONGSON2F  0x40000000
>  #define		INSN_VR54XX	0x80000000
> @@ -62,6 +63,7 @@
>  #define		CPU_MIPS3	(CPU_MIPS2 | ISA_MIPS3)
>  #define		CPU_MIPS4	(CPU_MIPS3 | ISA_MIPS4)
>  #define		CPU_VR54XX	(CPU_MIPS4 | INSN_VR54XX)
> +#define		CPU_R5900	(CPU_MIPS4 | INSN_R5900)
>  #define		CPU_LOONGSON2E  (CPU_MIPS3 | INSN_LOONGSON2E)
>  #define		CPU_LOONGSON2F  (CPU_MIPS3 | INSN_LOONGSON2F)
[...]


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      parent reply	other threads:[~2018-09-08  0:11 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-07-07 19:41 [Qemu-devel] [RFC] target/mips: Initial support for MIPS R5900 Fredrik Noring
2018-07-08 12:10 ` Fredrik Noring
2018-07-08 21:07 ` "Jürgen Urban"
2018-08-01  1:33 ` Maciej W. Rozycki
2018-08-01 13:39   ` Fredrik Noring
2018-08-01 13:54     ` Richard Henderson
2018-09-07 19:16       ` [Qemu-devel] [PATCH v2] " Fredrik Noring
2018-09-08  9:20         ` Aleksandar Markovic
2018-09-08 14:27           ` [Qemu-devel] [PATCH v3] target/mips: Support R5900 GCC programs in user mode Fredrik Noring
2018-09-11  9:46             ` Aleksandar Markovic
2018-09-08 11:31         ` [Qemu-devel] [PATCH v2] target/mips: Initial support for MIPS R5900 Maciej W. Rozycki
2018-09-12 20:23         ` Maciej W. Rozycki
2018-09-16 16:19           ` [Qemu-devel] [PATCH v3] target/mips: Support R5900 GCC programs in user mode Fredrik Noring
2018-09-08  0:03 ` Philippe Mathieu-Daudé [this message]

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