Unverified Commit ef85d057 authored by Paul Burton's avatar Paul Burton
Browse files

MIPS: Use compact branch for LL/SC loops on MIPSr6+ 



When targeting MIPSr6 or higher make use of a compact branch in LL/SC
loops, preventing the insertion of a delay slot nop that only serves to
waste space.

Signed-off-by: default avatarPaul Burton <paul.burton@mips.com>
Cc: linux-mips@vger.kernel.org
Cc: Huacai Chen <chenhc@lemote.com>
Cc: Jiaxun Yang <jiaxun.yang@flygoat.com>
Cc: linux-kernel@vger.kernel.org
parent 878f75c7

arch/mips/include/asm/llsc.h

+4 −0
Original line number Diff line number Diff line
@@ -9,6 +9,8 @@ 
#ifndef __ASM_LLSC_H

#define __ASM_LLSC_H



#include <asm/isa-rev.h>



#if _MIPS_SZLONG == 32

#define SZLONG_LOG 5

#define SZLONG_MASK 31UL
@@ -32,6 +34,8 @@ 
 */

#if R10000_LLSC_WAR

# define __SC_BEQZ "beqzl	"

#elif MIPS_ISA_REV >= 6

# define __SC_BEQZ "beqzc	"

#else

# define __SC_BEQZ "beqz	"

#endif