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1 | /* SPARC v9 __mpn_lshift -- |
2 | ||
d4697bc9 | 3 | Copyright (C) 1996-2014 Free Software Foundation, Inc. |
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4 | |
5 | This file is part of the GNU MP Library. | |
6 | ||
7 | The GNU MP Library is free software; you can redistribute it and/or modify | |
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8 | it under the terms of the GNU Lesser General Public License as published by |
9 | the Free Software Foundation; either version 2.1 of the License, or (at your | |
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10 | option) any later version. |
11 | ||
12 | The GNU MP Library is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
6d84f89a | 14 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |
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15 | License for more details. |
16 | ||
6d84f89a | 17 | You should have received a copy of the GNU Lesser General Public License |
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18 | along with the GNU MP Library; see the file COPYING.LIB. If not, |
19 | see <http://www.gnu.org/licenses/>. */ | |
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20 | |
21 | #include <sysdep.h> | |
22 | ||
23 | /* INPUT PARAMETERS | |
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24 | res_ptr %o0 |
25 | src_ptr %o1 | |
26 | size %o2 | |
27 | cnt %o3 */ | |
5ae3e846 | 28 | |
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29 | .register %g2, #scratch |
30 | .register %g3, #scratch | |
31 | ||
5ae3e846 | 32 | ENTRY(__mpn_lshift) |
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33 | sllx %o2,3,%g1 |
34 | add %o1,%g1,%o1 ! make %o1 point at end of src | |
35 | ldx [%o1-8],%g2 ! load first limb | |
36 | sub %g0,%o3,%o5 ! negate shift count | |
37 | add %o0,%g1,%o0 ! make %o0 point at end of res | |
38 | add %o2,-1,%o2 | |
39 | andcc %o2,4-1,%g4 ! number of limbs in first loop | |
40 | srlx %g2,%o5,%g1 ! compute function result | |
41 | be,pn %xcc,.L0 ! if multiple of 4 limbs, skip first loop | |
42 | mov %g1,%g5 | |
43 | ||
44 | sub %o2,%g4,%o2 ! adjust count for main loop | |
45 | ||
46 | .Loop0: ldx [%o1-16],%g3 | |
47 | add %o0,-8,%o0 | |
48 | add %o1,-8,%o1 | |
49 | sllx %g2,%o3,%o4 | |
50 | addcc %g4,-1,%g4 | |
51 | srlx %g3,%o5,%g1 | |
5ae3e846 | 52 | mov %g3,%g2 |
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53 | or %o4,%g1,%o4 |
54 | bne,pt %xcc,.Loop0 | |
55 | stx %o4,[%o0+0] | |
5ae3e846 | 56 | |
2e65ca2b | 57 | .L0: brz,pn %o2,.Lend |
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58 | nop |
59 | ||
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60 | .Loop: ldx [%o1-16],%g3 |
61 | add %o0,-32,%o0 | |
62 | sllx %g2,%o3,%o4 | |
63 | addcc %o2,-4,%o2 | |
64 | srlx %g3,%o5,%g1 | |
65 | ||
66 | ldx [%o1-24],%g2 | |
67 | sllx %g3,%o3,%g4 | |
68 | or %o4,%g1,%o4 | |
69 | stx %o4,[%o0+24] | |
70 | srlx %g2,%o5,%g1 | |
71 | ||
72 | ldx [%o1-32],%g3 | |
73 | sllx %g2,%o3,%o4 | |
74 | or %g4,%g1,%g4 | |
75 | stx %g4,[%o0+16] | |
76 | srlx %g3,%o5,%g1 | |
77 | ||
78 | ldx [%o1-40],%g2 | |
79 | sllx %g3,%o3,%g4 | |
80 | or %o4,%g1,%o4 | |
81 | stx %o4,[%o0+8] | |
82 | srlx %g2,%o5,%g1 | |
83 | ||
84 | add %o1,-32,%o1 | |
85 | or %g4,%g1,%g4 | |
86 | bne,pt %xcc,.Loop | |
87 | stx %g4,[%o0+0] | |
88 | ||
89 | .Lend: sllx %g2,%o3,%g2 | |
90 | stx %g2,[%o0-8] | |
91 | ||
92 | jmpl %o7+8, %g0 | |
93 | mov %g5,%o0 | |
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94 | |
95 | END(__mpn_lshift) |