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Diffstat (limited to 'arch/sh/lib/udivsi3-Os.S')
-rw-r--r-- | arch/sh/lib/udivsi3-Os.S | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/arch/sh/lib/udivsi3-Os.S b/arch/sh/lib/udivsi3-Os.S new file mode 100644 index 000000000000..2bed76587f1e --- /dev/null +++ b/arch/sh/lib/udivsi3-Os.S | |||
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1 | /* Copyright (C) 2006 Free Software Foundation, Inc. | ||
2 | |||
3 | This file is free software; you can redistribute it and/or modify it | ||
4 | under the terms of the GNU General Public License as published by the | ||
5 | Free Software Foundation; either version 2, or (at your option) any | ||
6 | later version. | ||
7 | |||
8 | In addition to the permissions in the GNU General Public License, the | ||
9 | Free Software Foundation gives you unlimited permission to link the | ||
10 | compiled version of this file into combinations with other programs, | ||
11 | and to distribute those combinations without any restriction coming | ||
12 | from the use of this file. (The General Public License restrictions | ||
13 | do apply in other respects; for example, they cover modification of | ||
14 | the file, and distribution when not linked into a combine | ||
15 | executable.) | ||
16 | |||
17 | This file is distributed in the hope that it will be useful, but | ||
18 | WITHOUT ANY WARRANTY; without even the implied warranty of | ||
19 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
20 | General Public License for more details. | ||
21 | |||
22 | You should have received a copy of the GNU General Public License | ||
23 | along with this program; see the file COPYING. If not, write to | ||
24 | the Free Software Foundation, 51 Franklin Street, Fifth Floor, | ||
25 | Boston, MA 02110-1301, USA. */ | ||
26 | |||
27 | /* Moderately Space-optimized libgcc routines for the Renesas SH / | ||
28 | STMicroelectronics ST40 CPUs. | ||
29 | Contributed by J"orn Rennecke joern.rennecke@st.com. */ | ||
30 | |||
31 | /* Size: 186 bytes jointly for udivsi3_i4i and sdivsi3_i4i | ||
32 | sh4-200 run times: | ||
33 | udiv small divisor: 55 cycles | ||
34 | udiv large divisor: 52 cycles | ||
35 | sdiv small divisor, positive result: 59 cycles | ||
36 | sdiv large divisor, positive result: 56 cycles | ||
37 | sdiv small divisor, negative result: 65 cycles (*) | ||
38 | sdiv large divisor, negative result: 62 cycles (*) | ||
39 | (*): r2 is restored in the rts delay slot and has a lingering latency | ||
40 | of two more cycles. */ | ||
41 | .balign 4 | ||
42 | .global __udivsi3_i4i | ||
43 | .global __udivsi3 | ||
44 | .set __udivsi3, __udivsi3_i4i | ||
45 | .type __udivsi3_i4i, @function | ||
46 | .type __sdivsi3_i4i, @function | ||
47 | __udivsi3_i4i: | ||
48 | sts pr,r1 | ||
49 | mov.l r4,@-r15 | ||
50 | extu.w r5,r0 | ||
51 | cmp/eq r5,r0 | ||
52 | swap.w r4,r0 | ||
53 | shlr16 r4 | ||
54 | bf/s large_divisor | ||
55 | div0u | ||
56 | mov.l r5,@-r15 | ||
57 | shll16 r5 | ||
58 | sdiv_small_divisor: | ||
59 | div1 r5,r4 | ||
60 | bsr div6 | ||
61 | div1 r5,r4 | ||
62 | div1 r5,r4 | ||
63 | bsr div6 | ||
64 | div1 r5,r4 | ||
65 | xtrct r4,r0 | ||
66 | xtrct r0,r4 | ||
67 | bsr div7 | ||
68 | swap.w r4,r4 | ||
69 | div1 r5,r4 | ||
70 | bsr div7 | ||
71 | div1 r5,r4 | ||
72 | xtrct r4,r0 | ||
73 | mov.l @r15+,r5 | ||
74 | swap.w r0,r0 | ||
75 | mov.l @r15+,r4 | ||
76 | jmp @r1 | ||
77 | rotcl r0 | ||
78 | div7: | ||
79 | div1 r5,r4 | ||
80 | div6: | ||
81 | div1 r5,r4; div1 r5,r4; div1 r5,r4 | ||
82 | div1 r5,r4; div1 r5,r4; rts; div1 r5,r4 | ||
83 | |||
84 | divx3: | ||
85 | rotcl r0 | ||
86 | div1 r5,r4 | ||
87 | rotcl r0 | ||
88 | div1 r5,r4 | ||
89 | rotcl r0 | ||
90 | rts | ||
91 | div1 r5,r4 | ||
92 | |||
93 | large_divisor: | ||
94 | mov.l r5,@-r15 | ||
95 | sdiv_large_divisor: | ||
96 | xor r4,r0 | ||
97 | .rept 4 | ||
98 | rotcl r0 | ||
99 | bsr divx3 | ||
100 | div1 r5,r4 | ||
101 | .endr | ||
102 | mov.l @r15+,r5 | ||
103 | mov.l @r15+,r4 | ||
104 | jmp @r1 | ||
105 | rotcl r0 | ||
106 | |||
107 | .global __sdivsi3_i4i | ||
108 | .global __sdivsi3 | ||
109 | .set __sdivsi3, __sdivsi3_i4i | ||
110 | __sdivsi3_i4i: | ||
111 | mov.l r4,@-r15 | ||
112 | cmp/pz r5 | ||
113 | mov.l r5,@-r15 | ||
114 | bt/s pos_divisor | ||
115 | cmp/pz r4 | ||
116 | neg r5,r5 | ||
117 | extu.w r5,r0 | ||
118 | bt/s neg_result | ||
119 | cmp/eq r5,r0 | ||
120 | neg r4,r4 | ||
121 | pos_result: | ||
122 | swap.w r4,r0 | ||
123 | bra sdiv_check_divisor | ||
124 | sts pr,r1 | ||
125 | pos_divisor: | ||
126 | extu.w r5,r0 | ||
127 | bt/s pos_result | ||
128 | cmp/eq r5,r0 | ||
129 | neg r4,r4 | ||
130 | neg_result: | ||
131 | mova negate_result,r0 | ||
132 | ; | ||
133 | mov r0,r1 | ||
134 | swap.w r4,r0 | ||
135 | lds r2,macl | ||
136 | sts pr,r2 | ||
137 | sdiv_check_divisor: | ||
138 | shlr16 r4 | ||
139 | bf/s sdiv_large_divisor | ||
140 | div0u | ||
141 | bra sdiv_small_divisor | ||
142 | shll16 r5 | ||
143 | .balign 4 | ||
144 | negate_result: | ||
145 | neg r0,r0 | ||
146 | jmp @r2 | ||
147 | sts macl,r2 | ||