Merge branch 'sh/dwarf-unwinder'
[pandora-kernel.git] / arch / blackfin / lib / ashrdi3.c
1 /*
2  * Copyright 2004-2009 Analog Devices Inc.
3  *
4  * Licensed under the GPL-2 or later.
5  */
6
7 #include "gcclib.h"
8
9 #ifdef CONFIG_ARITHMETIC_OPS_L1
10 DItype __ashrdi3(DItype u, word_type b)__attribute__((l1_text));
11 #endif
12
13 DItype __ashrdi3(DItype u, word_type b)
14 {
15         DIunion w;
16         word_type bm;
17         DIunion uu;
18
19         if (b == 0)
20                 return u;
21
22         uu.ll = u;
23
24         bm = (sizeof(SItype) * BITS_PER_UNIT) - b;
25         if (bm <= 0) {
26                 /* w.s.high = 1..1 or 0..0 */
27                 w.s.high = uu.s.high >> (sizeof(SItype) * BITS_PER_UNIT - 1);
28                 w.s.low = uu.s.high >> -bm;
29         } else {
30                 USItype carries = (USItype) uu.s.high << bm;
31                 w.s.high = uu.s.high >> b;
32                 w.s.low = ((USItype) uu.s.low >> b) | carries;
33         }
34
35         return w.ll;
36 }