From: Paul Brook <paul@codesourcery.com>
To: qemu-devel@nongnu.org
Cc: Andrzej Zaborowski <balrog@zabor.org>,
Aurelien Jarno <aurelien@aurel32.net>
Subject: Re: [Qemu-devel] [PATCH 11/18] tcg/arm: add bswap ops
Date: Fri, 9 Apr 2010 00:32:04 +0100 [thread overview]
Message-ID: <201004090032.05788.paul@codesourcery.com> (raw)
In-Reply-To: <1270662685-7379-12-git-send-email-aurelien@aurel32.net>
> +static inline void tcg_out_bswap32(TCGContext *s, int cond, int rd, int rn)
> +#else
> + /* This code only uses one temporary register. There is probably
> + a faster way to do that with more temporary registers. */
You can do better even without a temporary:
eor r8, rn, rn, ror #16
bic r8, r8, #0x00ff0000
mov rd, rn, ror #8
eor rd, rd, r8, lsr #8
Paul
next prev parent reply other threads:[~2010-04-08 23:32 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-07 17:51 [Qemu-devel] [PATCH 0/18] tcg/arm: cleanup and improvements Aurelien Jarno
2010-04-07 17:51 ` [Qemu-devel] [PATCH 01/18] tcg/arm: remove SAVE_LR code Aurelien Jarno
2010-04-07 17:51 ` [Qemu-devel] [PATCH 02/18] tcg/arm: explicitely list clobbered/reserved regs Aurelien Jarno
2010-04-07 17:51 ` [Qemu-devel] [PATCH 03/18] tcg/arm: remove store signed functions Aurelien Jarno
2010-04-07 17:51 ` [Qemu-devel] [PATCH 04/18] tcg/arm: replace integer values by registers enum Aurelien Jarno
2010-04-07 17:51 ` [Qemu-devel] [PATCH 05/18] tcg/arm: align 64-bit arguments in function calls Aurelien Jarno
2010-04-07 17:51 ` [Qemu-devel] [PATCH 06/18] tcg/arm: add defines for the allowed instructions set Aurelien Jarno
2010-04-08 13:46 ` Paul Brook
2010-04-08 16:46 ` Richard Henderson
2010-04-07 17:51 ` [Qemu-devel] [PATCH 07/18] tcg/arm: sxtb and sxth are available starting with ARMv6 Aurelien Jarno
2010-04-07 17:51 ` [Qemu-devel] [PATCH 08/18] tcg/arm: use the blx instruction when possible Aurelien Jarno
2010-04-07 17:51 ` [Qemu-devel] [PATCH 09/18] tcg/arm: add rotation ops Aurelien Jarno
2010-04-07 17:51 ` [Qemu-devel] [PATCH 10/18] tcg/arm: add ext16u op Aurelien Jarno
2010-04-07 17:51 ` [Qemu-devel] [PATCH 11/18] tcg/arm: add bswap ops Aurelien Jarno
2010-04-08 23:32 ` Paul Brook [this message]
2010-04-09 17:11 ` Aurelien Jarno
2010-04-07 17:51 ` [Qemu-devel] [PATCH 12/18] tcg/arm: remove conditional argument for qemu_ld/st Aurelien Jarno
2010-04-07 17:51 ` [Qemu-devel] [PATCH 13/18] tcg/arm: use ext* ops in qemu_ld Aurelien Jarno
2010-04-07 17:51 ` [Qemu-devel] [PATCH 14/18] tcg/arm: bswap arguments in qemu_ld/st if needed Aurelien Jarno
2010-04-07 17:51 ` [Qemu-devel] [PATCH 15/18] tcg/arm: remove useless register tests in qemu_ld/st Aurelien Jarno
2010-04-07 17:51 ` [Qemu-devel] [PATCH 16/18] tcg/arm: fix argument alignment in qemu_st64 Aurelien Jarno
2010-04-07 17:51 ` [Qemu-devel] [PATCH 17/18] tcg/arm: optimize register allocation order Aurelien Jarno
2010-04-07 17:51 ` [Qemu-devel] [PATCH 18/18] tcg/arm: don't try to load constants using pc Aurelien Jarno
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