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David Howellsb920de12008-02-08 04:19:31 -08001/* MN10300 64-bit arithmetic left 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#include <asm/cache.h>
12
13 .text
14 .balign L1_CACHE_BYTES
15
16###############################################################################
17#
18# unsigned long long __ashldi3(unsigned long long value [D1:D0],
19# unsigned by [(12,SP)])
20#
21###############################################################################
22 .globl __ashldi3
23 .type __ashldi3,@function
24__ashldi3:
25 mov (12,sp),a0
26 and +63,a0
27 beq __ashldi3_zero
28
29 cmp +31,a0
30 bhi __ashldi3_32plus
31
32 # the count is in the range 1-31
33 asl a0,d1
34
35 mov +32,a1
36 sub a0,a1,a1 # a1 = 32 - count
37 lsr a1,d0,a1 # get overflow from LSW -> MSW
38
39 or_asl a1,d1,a0,d0 # insert overflow into MSW and
40 # shift the LSW
41 rets
42
43 .balign L1_CACHE_BYTES
44 # the count is in the range 32-63
45__ashldi3_32plus:
46 asl a0,d0,d1
47 clr d0
48__ashldi3_zero:
49 rets
50
51 .size __ashldi3, .-__ashldi3