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| author | George Spelvin | 2016-05-26 17:36:19 +0200 |
|---|---|---|
| committer | George Spelvin | 2016-05-28 21:48:57 +0200 |
| commit | 14c44b95b3dcb8ff1d627e6b78f57c4373d375cb (patch) | |
| tree | e81c581cdff3075036b99e0dbf2f0c47afe1e6ec /arch/m68k/Kconfig.cpu | |
| parent | <linux/hash.h>: Add support for architecture-specific functions (diff) | |
| download | kernel-qcow2-linux-14c44b95b3dcb8ff1d627e6b78f57c4373d375cb.tar.gz kernel-qcow2-linux-14c44b95b3dcb8ff1d627e6b78f57c4373d375cb.tar.xz kernel-qcow2-linux-14c44b95b3dcb8ff1d627e6b78f57c4373d375cb.zip | |
m68k: Add <asm/hash.h>
This provides a multiply by constant GOLDEN_RATIO_32 = 0x61C88647
for the original mc68000, which lacks a 32x32-bit multiply instruction.
Yes, the amount of optimization effort put in is excessive. :-)
Shift-add chain found by Yevgen Voronenko's Hcub algorithm at
http://spiral.ece.cmu.edu/mcm/gen.html
Signed-off-by: George Spelvin <linux@sciencehorizons.net>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greg Ungerer <gerg@linux-m68k.org>
Cc: Andreas Schwab <schwab@linux-m68k.org>
Cc: Philippe De Muyter <phdm@macq.eu>
Cc: linux-m68k@lists.linux-m68k.org
Diffstat (limited to 'arch/m68k/Kconfig.cpu')
| -rw-r--r-- | arch/m68k/Kconfig.cpu | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/m68k/Kconfig.cpu b/arch/m68k/Kconfig.cpu index 0dfcf1281e9c..bf3de464cf3c 100644 --- a/arch/m68k/Kconfig.cpu +++ b/arch/m68k/Kconfig.cpu @@ -40,6 +40,7 @@ config M68000 select CPU_HAS_NO_MULDIV64 select CPU_HAS_NO_UNALIGNED select GENERIC_CSUM + select HAVE_ARCH_HASH help The Freescale (was Motorola) 68000 CPU is the first generation of the well known M68K family of processors. The CPU core as well as |