1/* MN10300 64-bit logical right shift 2 * 3 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. 4 * Written by David Howells (dhowells@redhat.com) 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public Licence 8 * as published by the Free Software Foundation; either version 9 * 2 of the Licence, or (at your option) any later version. 10 */ 11 12#include <asm/cache.h> 13 14 .text 15 .balign L1_CACHE_BYTES 16 17############################################################################### 18# 19# unsigned long long __lshrdi3(unsigned long long value [D1:D0], 20# unsigned by [(12,SP)]) 21# 22############################################################################### 23 .globl __lshrdi3 24 .type __lshrdi3,@function 25__lshrdi3: 26 mov (12,sp),a0 27 and +63,a0 28 beq __lshrdi3_zero 29 30 cmp +31,a0 31 bhi __lshrdi3_32plus 32 33 # the count is in the range 1-31 34 lsr a0,d0 35 36 mov +32,a1 37 sub a0,a1,a1 # a1 = 32 - count 38 asl a1,d1,a1 # get underflow from MSW -> LSW 39 40 or_lsr a1,d0,a0,d1 # insert underflow into LSW and 41 # shift the MSW 42 rets 43 44 .balign L1_CACHE_BYTES 45 # the count is in the range 32-63 46__lshrdi3_32plus: 47 lsr a0,d1,d0 48 clr d1 49__lshrdi3_zero: 50 rets 51 52 .size __lshrdi3, .-__lshrdi3 53