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Date: Fri, 08 Nov 2013 17:02:57 +0000 From: Måns Rullgård <mans@...sr.com> To: Stephen Boyd <sboyd@...eaurora.org> Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH] ARM: Use udiv/sdiv for __aeabi_{u}idiv library functions Stephen Boyd <sboyd@...eaurora.org> writes: > +int __aeabi_idiv(int numerator, int denominator) > +{ > + if (static_key_false(&cpu_has_idiv)) { > + int ret; > + > + asm volatile ( > + ".arch_extension idiv\n" > + "sdiv %0, %1, %2" > + : "=&r" (ret) There is no need for the & in the output constraint. Dropping it allows using one of the source registers as destination which may sometimes be beneficial. > + : "r" (numerator), "r" (denominator)); > + > + return ret; > + } > + > + return ___aeabi_idiv(numerator, denominator); > +} -- Måns Rullgård mans@...sr.com -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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