From: Segher Boessenkool <segher@kernel.crashing.org>
To: Christophe Leroy <christophe.leroy@c-s.fr>
Cc: linuxppc-dev@lists.ozlabs.org, Paul Mackerras <paulus@samba.org>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 3/3] powerpc/64: optimise LOAD_REG_IMMEDIATE_SYM()
Date: Mon, 19 Aug 2019 09:24:59 -0500 [thread overview]
Message-ID: <20190819142459.GJ31406@gate.crashing.org> (raw)
In-Reply-To: <92bf50b31f5f78cc76ed055b11a492e8e9e2c731.1566223054.git.christophe.leroy@c-s.fr>
On Mon, Aug 19, 2019 at 01:58:12PM +0000, Christophe Leroy wrote:
> -#define LOAD_REG_IMMEDIATE_SYM(reg,expr) \
> - lis reg,(expr)@highest; \
> - ori reg,reg,(expr)@higher; \
> - rldicr reg,reg,32,31; \
> - oris reg,reg,(expr)@__AS_ATHIGH; \
> - ori reg,reg,(expr)@l;
> +#define LOAD_REG_IMMEDIATE_SYM(reg, tmp, expr) \
> + lis reg, (expr)@highest; \
> + lis tmp, (expr)@__AS_ATHIGH; \
> + ori reg, reg, (expr)@higher; \
> + ori tmp, reg, (expr)@l; \
> + rldimi reg, tmp, 32, 0
That should be
#define LOAD_REG_IMMEDIATE_SYM(reg, tmp, expr) \
lis tmp, (expr)@highest; \
ori tmp, tmp, (expr)@higher; \
lis reg, (expr)@__AS_ATHIGH; \
ori reg, reg, (expr)@l; \
rldimi reg, tmp, 32, 0
(tmp is the high half, reg is the low half, as inputs to that rldimi).
Segher
next prev parent reply other threads:[~2019-08-19 14:31 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-19 13:58 [PATCH v3 1/3] powerpc: rewrite LOAD_REG_IMMEDIATE() as an intelligent macro Christophe Leroy
2019-08-19 13:58 ` [PATCH v3 2/3] powerpc/32: replace LOAD_MSR_KERNEL() by LOAD_REG_IMMEDIATE() Christophe Leroy
2019-08-19 13:58 ` [PATCH v3 3/3] powerpc/64: optimise LOAD_REG_IMMEDIATE_SYM() Christophe Leroy
2019-08-19 14:24 ` Segher Boessenkool [this message]
2019-08-19 15:05 ` Nicholas Piggin
2019-08-19 14:16 ` [PATCH v3 1/3] powerpc: rewrite LOAD_REG_IMMEDIATE() as an intelligent macro Segher Boessenkool
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