From 84f3fb7a2aadeda3c0a34e61591a8eccf5e367b4 Mon Sep 17 00:00:00 2001 From: Greg Ungerer Date: Fri, 11 Nov 2011 15:13:08 +1000 Subject: m68k: handle presence of 64bit mul/div instructions cleanly The traditional 68000 processors and the newer reduced instruction set ColdFire processors do not support the 32*32->64 multiply or the 64/32->32 divide instructions. This is not a difference based on the presence of a hardware MMU or not. Create a new config symbol to mark that a CPU type doesn't support the longer multiply/divide instructions. Use this then as a basis for using the fast 64bit based divide (in div64.h) and for linking in the extra libgcc functions that may be required (mulsi3, divsi3, etc). Signed-off-by: Greg Ungerer Acked-by: Geert Uytterhoeven --- arch/m68k/include/asm/div64.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'arch/m68k/include') diff --git a/arch/m68k/include/asm/div64.h b/arch/m68k/include/asm/div64.h index edb66148a71d..444ea8a09e9f 100644 --- a/arch/m68k/include/asm/div64.h +++ b/arch/m68k/include/asm/div64.h @@ -1,7 +1,9 @@ #ifndef _M68K_DIV64_H #define _M68K_DIV64_H -#ifdef CONFIG_MMU +#ifdef CONFIG_CPU_HAS_NO_MULDIV64 +#include +#else #include @@ -27,8 +29,6 @@ __rem; \ }) -#else -#include -#endif /* CONFIG_MMU */ +#endif /* CONFIG_CPU_HAS_NO_MULDIV64 */ #endif /* _M68K_DIV64_H */ -- cgit v1.2.1